CN111094193A

CN111094193A - Water treatment device and water treatment system

Info

Publication number: CN111094193A
Application number: CN201880054801.2A
Authority: CN
Inventors: 藤田浩史; 广田达哉; 野间真二郎; 平山哲章; 丸尾友子; 五百崎太辅
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2017-08-25
Filing date: 2018-04-25
Publication date: 2020-05-01
Also published as: WO2019038994A1; JPWO2019038994A1

Abstract

The water treatment device (10) is provided with a container (20) and a solid medicine dissolver (30), the solid medicine dissolver (30) is accommodated in the container (20), and includes a water supply part (31), which is sent from the container (20) ) to convey raw water outside; the lower plate part (33) has a first opening (32) communicating with the water supply part (31); the upper plate part (37) has a gap (34) with the lower plate part (33) Opposed to each other, it has a plurality of second openings (35) for supporting the solid medicine (36); and a gasket (38) for passing raw water from the first openings (32) through the plurality of second openings (36). 35) to be surrounded by the gap (34) that flows; the positions of the plurality of second openings (35) provided in the upper plate (37) and the first openings (35) provided in the lower plate (33) The position of 32) is shifted in the direction perpendicular to the stacking direction of the upper plate portion (37) and the lower plate portion (33).

Description

Water treatment device and water treatment system

Technical Field

The present invention relates to a water treatment apparatus and a water treatment system using the same. More particularly, the present invention relates to a water treatment apparatus capable of purifying water to be treated by finely controlling the chemical concentration of the water and a water treatment system using the water treatment apparatus.

Background

Conventionally, various water treatment apparatuses have been proposed as water treatment apparatuses for purifying water to be treated. By using such a water treatment apparatus, it is possible to purify well water as water to be treated, for example, to obtain purified water.

As a method for purifying the water to be treated, for example, a device for dissolving a solid chemical into the water to be treated has been proposed (for example, see patent documents 1 and 2).

Patent document 1 describes a medicine supply device including a collecting reservoir and an etching reservoir disposed in the collecting reservoir at a distance from a wall portion thereof. An elongated hydraulic cylinder is supported on the trapping liquid reservoir, and the lower end of the hydraulic cylinder is disposed in the trapping liquid reservoir. The capture reservoir has a water discharge port and the etch reservoir has an inlet with a valve controlling the flow rate of water into the etch reservoir. A tank for containing a solid chemical sterilizing material is supported in the hydraulic cylinder, and the lower end portion of the tank is disposed above the etching reservoir. Since the opening is provided at the lower end of the tank, the solid dry sterilizing material provided at the lower end of the tank comes into contact with water in the etching reservoir to etch and dissolve the solid material, and the chemically treated water flowing out of the etching reservoir can be made to flow into the collecting reservoir.

Patent document 2 describes a supply device including a feeder inlet and a feeder outlet, and a storage container having a porous lower portion and containing a solid chemical, for adding the chemical to a water flow. Further, the supply device includes: a first conduit having a conduit flow outlet in communication with the feeder flow inlet at least in a first feeder state; and a wall surrounding and extending upwardly from the conduit outlet to maintain a body of water in which the conduit outlet is submerged in at least the first hopper state. Further, the supply device includes an effluent chamber that houses an overflow containing dissolved medicine from the body of water and is in communication with the feeder outlet when in at least the first feeder state.

Documents of the prior art

Patent document

Patent document 1: japanese Kohyo publication Hei 6-501418

Patent document 2: japanese Kokai publication Hei-2005-511267

The medicine supply device described in patent document 1 is a device that supplies a part of a solid medicine by immersing the medicine in water to be treated. Therefore, although chlorine can be continuously supplied to a large-scale bath such as a pool, when a chemical is intermittently supplied to a relatively small amount of water to be treated, the solid chemical dissolves excessively into the water to be treated when the circulation of the water is stopped. Therefore, according to the medicine supply device described in patent document 1, the medicine concentration may become higher than necessary.

In the supply device described in patent document 2, the solid chemical is not always immersed in the water to be treated, but the water to be treated is directly circulated through the tablet-shaped chemical that is easily dissolved in the water. Therefore, although chlorine can be continuously supplied to a large-scale bath such as a pool, if a chemical is intermittently supplied to a relatively small amount of water to be treated, the chemical may dissolve more than necessary in the storage container.

In this way, when a solid chemical is dissolved in a conventional apparatus, the chemical concentration of the water to be treated cannot be finely controlled to purify the water, and the chemical concentration may become higher than necessary. Therefore, the conventional apparatus has the following problems: it cannot be used for domestic water or the like requiring intermittent supply of chemicals to a relatively small amount of water to be treated.

Disclosure of Invention

The present invention has been made in view of the problems of the prior art. It is another object of the present invention to provide a water treatment apparatus and a water treatment system using the water treatment apparatus, which can purify water by finely controlling the chemical concentration of the water to be treated.

In order to solve the above problem, a water treatment apparatus according to a first aspect of the present invention includes a container and a solid chemical dissolver housed in the container. The solid medicament dissolver includes: a water supply unit for supplying raw water from outside the container; a lower plate part having a 1 st opening part communicated with the water feeding part; and an upper plate portion disposed opposite to the lower plate portion with a gap therebetween, having a plurality of 2 nd openings, and supporting the solid medicine. The solid chemical dissolver further includes a spacer disposed so as to surround the gap through which the raw water flows from the 1 st opening through the plurality of 2 nd openings. The positions of the plurality of 2 nd openings provided in the upper plate portion and the position of the 1 st opening provided in the lower plate portion are offset from each other in a direction perpendicular to the stacking direction of the upper plate portion and the lower plate portion.

A water treatment system according to a second aspect of the present invention includes: a water treatment device; a water suction pump disposed upstream of the solid chemical dissolver in the main pipe and sucking up raw water; and a filter device disposed downstream of the solid chemical dissolver in the main pipe. The water treatment system further includes a coagulant supply device that is provided in a second bypass pipe disposed on the upstream side of the filter device and that supplies the coagulant to the water to which the chlorine-based chemical has been supplied. A water treatment device is provided with: a main pipe arranged in parallel to the container and the solid chemical dissolver; a first bypass piping connected to one side of the water supply part; and a connection pipe having one end connected to the container; the solid preparation is chlorine preparation. The upstream side of the second bypass pipe is connected to the first bypass pipe.

Drawings

Fig. 1 is a schematic diagram showing a piping structure in a case where well water is stored in a water storage tank.

Fig. 2 is a schematic diagram showing a piping structure in which the water purification apparatus and the water storage tank are combined.

Fig. 3 is a schematic diagram showing a piping structure in the case where well water is used as domestic water as it is.

Fig. 4 is a schematic diagram showing an example of a water purification apparatus for purifying well water.

Fig. 5 is a schematic diagram showing an example of a water purification apparatus for purifying well water.

Fig. 6 is a schematic cross-sectional view showing an example of the water treatment apparatus according to the present embodiment.

Fig. 7 is an exploded perspective view showing an example of the solid-form medicine dissolver.

Fig. 8 is an exploded perspective view showing another example of the solid-form medicine dissolver.

Fig. 9 is an exploded perspective view showing another example of the solid-form medicine dissolver.

Fig. 10 is a schematic diagram showing an example of a piping structure using the water treatment apparatus of the present embodiment.

Fig. 11A is a schematic cross-sectional view showing a state of the flow rate adjusting unit in the case where the amount of water is small.

Fig. 11B is a schematic cross-sectional view showing a state of the flow rate adjusting unit when the amount of water is equal to or greater than the predetermined amount.

Fig. 12 is a schematic diagram showing another example of a piping structure using the water treatment apparatus of the present embodiment.

Fig. 13 is a schematic diagram showing another example of a piping structure using the water treatment apparatus of the present embodiment.

Fig. 14 is a schematic diagram showing another example of a piping structure using the water treatment apparatus of the present embodiment.

Fig. 15 is a schematic diagram showing another example of a piping structure using the water treatment apparatus of the present embodiment.

Detailed Description

Hereinafter, the water treatment apparatus and the water treatment system according to the present embodiment will be described in detail. In addition, the dimensional ratio of the drawings may be exaggerated for convenience of explanation so as to be different from the actual ratio. In the present specification, water or rainwater drawn from a water source such as a well, a river, or a pond, the water quality of which is improved by a water treatment apparatus, is referred to as "raw water" or "water to be treated". The raw water purified by improving the water quality is referred to as "purified water".

[ Water treatment apparatus ]

Unlike developed countries such as japan, in developing countries, well water or tap water as raw water is often contaminated with bacteria and contains a large amount of turbid components. Therefore, there is a high demand for purifying well water or tap water as raw water to be used.

On the other hand, in developing countries where stable supply of electric power is not possible, domestic water is often stored in a water tank provided on a roof or a rooftop in order to enable water use even in the event of a power failure. For example, as shown in fig. 1, in a developing country, a water storage tank 120 is installed on a roof 2 of a building 1 to store domestic water. One of the first pipes 140 is connected to an upper portion of the water tank 120, and the other of the first pipes 140 is immersed in well water. The first pipe 140 is provided with a water pump 170 for pumping up raw water (well water) from the well. One of the second pipes 180 is connected to a lower portion of the water tank 120, and the other of the second pipes 180 is connected to a faucet or the like inside the building 1.

A water level sensor 121 for detecting the level of the water stored in the water storage tank 120 is provided on the top surface of the water storage tank 120. The water level sensor 121 can detect two water levels, for example, a predetermined low water level WL and a predetermined high water level (full water level) WH. The water pump 170 operates in response to the output of the water level sensor 121. That is, when the water level sensor 121 detects the low water level WL, the suction pump 170 is turned on (on), and sucks up well water through the first pipe 140 to supply the well water to the water tank 120.

In developing countries, the stored water stored in the storage tank 120 is purified and used as domestic water. For example, as shown in fig. 2, calcium hypochlorite or the like is solidified into a pill shape to be a solid drug, and is hung from the top surface of the water tank 120 and immersed in the remaining water while being held in the solid drug holding jig 130. The impregnated solid chemical is gradually dissolved, and the retained water is purified. However, in the purification process shown in fig. 2, the solid chemical holding tool 130 needs to be replaced to periodically replenish the solid chemical into the water tank 120, but since the water tank 120 is installed on the roof 2 of the building 1, it is very troublesome to check and replace the remaining amount of the solid chemical.

On the other hand, the water storage tank is usually 300L to 2000L in capacity, and is very large and heavy, and therefore cannot be easily installed on the roof or roof of a building. Further, even if a water storage tank is provided, a large load is applied to a roof or a roof supporting the water storage tank once the water storage tank is full, and therefore, it is necessary to improve load resistance of a building. Further, since the water storage tank is not inexpensive, the water storage tank cannot be used except for a high-income layer (rich layer) in many cases.

Therefore, in recent years, inexpensive automatic pumps have been popularized, and they have been selected by a low-income tier, thereby advancing the use of a container. That is, as shown in fig. 3, the roof 2 of the building 1 is not provided with a water storage tank, and the well water is pumped up by using a water pump 170 as an automatic pump and used as the domestic water. Such an automatic pump is a pump having a built-in pressure switch, and the pump is operated only when the faucet is turned on.

In this case, as shown in fig. 4, it is conceivable to provide a liquid chemical supply unit 190 downstream of the water-drawing pump 170 and to introduce a chlorine-based chemical such as an aqueous sodium hypochlorite solution immediately after drawing up the well water. The liquid medicine feeder 190 includes: a chlorine agent tank 191 for holding a liquid chlorine agent; and a chemical feed pipe 192 for connecting the chlorine chemical tank 191 to the first pipe 140 and feeding the chlorine chemical from the chlorine chemical tank 191 to the first pipe 140. The liquid medicine feeder 190 further includes a dosing pump 193 provided in the medicine feeding tube 192 for feeding the chlorine-containing medicine by a predetermined amount. In the liquid chemical supply unit 190, a predetermined amount of chlorine-based chemical can be injected from the chlorine chemical tank 191 into the raw water by the chemical feed pipe 192 and the metering pump 193.

However, the metering pump 193 for injecting a predetermined amount of chlorine-containing chemical from the chlorine chemical tank 191 into raw water requires precise control of the amount of chlorine injection corresponding to the flow rate, and also requires a measure against chlorine, which is expensive. Therefore, the fixed displacement pump 193 cannot be easily used even in a high-input layer.

As shown in fig. 5, it is also conceivable to use a solid drug dissolver 200 instead of the liquid drug supplier 190. The solid chemical dissolver 200 includes a solid chemical holding jig 131 holding therein a substance obtained by solidifying a solid chemical such as calcium hypochlorite into a pill shape, for example, and can be configured such that raw water can come into contact with the solid chemical. The solid chemical holding tool 131 can be connected to the first pipe 140 by the bypass pipe 150.

Various apparatuses have been proposed as water treatment apparatuses including the solid chemical dissolver 200, but most of them are apparatuses in which a solid chemical is gradually dissolved in the recirculating water in a water tank. Although such a water treatment apparatus can continuously supply a chemical to water to be treated, when the chemical is intermittently supplied to a relatively small amount of water to be treated, the chemical concentration of the water to be treated may not be finely controlled and purified. For example, in the case of an apparatus for supplying a chemical by immersing a part of a solid chemical in water to be treated, chlorine can be continuously supplied to a large-scale bath such as a pool. However, when the chemical is intermittently supplied to a relatively small amount of water to be treated, the solid chemical may excessively dissolve in the water to be treated when the circulation of the water is stopped, and the chemical concentration may become higher than necessary.

In addition, even in a device in which a solid chemical is not always immersed in the water to be treated, in the case of a device in which the water to be treated is directly circulated to the sheet-like chemical, if the chemical is intermittently supplied to a relatively small amount of water to be treated, the chemical may be dissolved more than necessary.

In this way, when a solid chemical is dissolved in a conventional apparatus, the concentration of the chemical in the water to be treated cannot be finely controlled and purified, and the concentration of the chemical may become higher than necessary, which causes a problem that the apparatus cannot be used as water for daily use.

In order to solve the above problem, the water treatment apparatus 10 of the present embodiment includes a container 20 and a solid chemical dissolver 30. The solid-drug dissolver 30 includes a water feeding unit 31, a lower plate 33, an upper plate 37 disposed opposite the lower plate 33 with a gap 34, and a spacer 38. The spacer 38 is disposed so as to surround the gap through which the raw water flows from the 1 st opening 32 through the plurality of 2 nd openings 35. Further, the positions of the plurality of 2 nd openings 35 provided in the upper plate portion 37 and the position of the 1 st opening 32 provided in the lower plate portion 33 are displaced in a direction perpendicular to the stacking direction of the upper plate portion 37 and the lower plate portion 33. Therefore, the raw water passing through the water feeding unit 31 does not directly contact the solid chemical 36 with the original force, but once hits the upper plate 37, a part of the raw water passes through the plurality of 2 nd openings 35 of the upper plate 37 and smoothly flows into the solid chemical 36. That is, since the flow of the raw water in which the solid chemical 36 is dissolved is gentle, the solid chemical 36 is uniformly dissolved in the raw water. Therefore, according to the present embodiment, the water treatment apparatus 10 can be obtained which can purify raw water (water to be treated) by finely controlling the chemical concentration. Further, according to the present embodiment, the water to be treated flowing out of the gap 34 without passing through the plurality of 2 nd openings 35 can be blocked by the packing 38. Therefore, a space having air is formed in the region formed by the upper plate portion 37, the lower plate portion 33, and the inner wall of the container 20. Therefore, the space above the upper plate portion 37 and the space below the lower plate portion 33 can be prevented from being blocked by the water to be treated. Therefore, the water treatment apparatus 10 of the present embodiment can stabilize the water surface of the raw water moving from the 1 st opening 32 to the solid chemical 36 side through the plurality of 2 nd openings 35, and can stably dissolve the solid chemical 36. The following describes the present embodiment in detail.

(Container 20)

At least 1 or more solid medicines 36 are accommodated in the container 20. In the container 20, the solid chemical 36 is dissolved in the raw water supplied from the outside of the container 20, thereby purifying the raw water.

In the embodiment of fig. 6, the shape of the container 20 is cylindrical, but is not particularly limited thereto, and may be conical, polygonal columnar, or polygonal pyramidal. The container 20 is hollow so as to be able to contain a solid medicament 36. The inner diameter of the container 20 is not particularly limited as long as the solid drug 36 can be accommodated therein, and is preferably larger than the diameter of the solid drug 36. That is, since the disk-shaped solid medicine 36 having a diameter of 70mm to 80mm is often used, the inner diameter of the container 20 is preferably larger than 70mm to 80 mm. The inner diameter of the container 20 is not particularly limited, but is preferably 120mm or less so that the stacked solid medicines 36 are unlikely to collapse.

The solid chemical 36 is not particularly limited, and chlorine-based chemicals and the like can be used. The type of the solid pharmaceutical agent 36 is not particularly limited, and at least one selected from the group consisting of sodium hypochlorite, calcium hypochlorite, and chlorinated isocyanuric acid can be used. As calcium hypochlorite, at least one of bleaching powder (available chlorine 30%) and high bleaching powder (available chlorine 70%) can be used. As the chlorinated isocyanuric acid, at least one selected from the group consisting of sodium trichloroisocyanurate, potassium trichloroisocyanurate, sodium dichloroisocyanurate, and potassium dichloroisocyanurate can be used.

The height of the container 20 is preferably 15cm to 150cm so that the solid medicines 36 can be arranged in layers. If the lower layer of the solid chemical 36 is dissolved in the raw water and consumed, the solid chemical 36 disposed thereon falls down by gravity. Therefore, by arranging a plurality of solid medicines 36 in a stacked manner inside the container 20, the amount of work for replenishing the solid medicines 36 can be eliminated.

The material of the container 20 is not particularly limited, and glass, resin, metal, or the like can be used. Further, the container 20 is preferably formed mainly of glass and translucent resin so that the state of the solid medicine 36 can be easily checked from the outside. In addition, from the viewpoint of weight reduction and cost, the container 20 is preferably formed mainly of resin.

In the embodiment of fig. 6, the container 20 includes a lid 21, a bottom 22, and a side surface 23 formed by connecting the outer periphery of the lid 21 and the outer periphery of the bottom 22.

Lid 21 covers the entire upper surface of container 20, and by opening and closing lid 21, solid drug 36 can be replenished into container 20.

The bottom portion 22 has an opening portion 24 at a substantially center in the radial direction, and the opening portion 24 is connected to the main pipe 40 at a connection portion 42. The bottom portion 22 is formed so that the thickness thereof decreases from the outer peripheral direction toward the center, and the purified water purified inside the tank 20 is sent to the main pipe 40 through the opening 24 of the bottom portion 22. The opening 24 may be connected to the connection portion 42 of the main pipe 40 by a connection pipe 55 (see fig. 10).

(solid type medicine dissolver 30)

As shown in fig. 6 and 7, solid-drug dissolver 30 includes water supply unit 31, lower plate 33, upper plate 37, and spacer 38. The solid drug dissolver 30 is housed in the container 20. The solid chemical 36 is supported by the solid chemical dissolver 30.

(Water supply part 31)

The water feed unit 31 feeds raw water from the outside of the container 20. In the embodiment of fig. 6, one of the water feed units 31 is connected to the bypass pipe 50, and the other of the water feed units 31 is connected to the 1 st opening 32 of the lower plate 33. The water supply unit 31 extends upward from the bottom 22 of the container 20 toward the lid 21. The raw water having passed through the bypass pipe 50 further passes through the water feeding unit 31 and is fed to the 1 st opening 32 of the lower plate 33.

The upper plate 37 and the lower plate 33 are disposed to face each other with a gap 34. In the embodiment of fig. 6, the upper plate portion 37 and the lower plate portion 33 are arranged to face each other with a gap 34 therebetween and to be overlapped in a substantially parallel manner.

As shown in fig. 7, the spacer 38 is disposed so as to surround the gap 34 through which the raw water flows from the 1 st opening 32 through the plurality of 2 nd openings 35. In the embodiment of fig. 7, a spacer 38 is provided between the upper plate portion 37 and the lower plate portion 33 between the edge portion of the upper plate portion 37 and the edge portion of the lower plate portion 33 so as to block at least a part of the flow of raw water flowing in the horizontal direction from the 1 st opening 32 through the gap 34. In the embodiment of fig. 7, the arc-shaped spacer 38 is formed by connecting the upper plate portion 37 and the lower plate portion 33 as viewed in the stacking direction. However, the gasket 38 may be any gasket as long as at least a part of the flow of raw water is blocked, and the shape, number, arrangement, and the like of the gasket 38 are not particularly limited.

By providing such a gasket 38, a space having air is formed on the container 20 side with respect to the gasket 38, and the space is adjacent to the gasket 38. Therefore, even when the distance between the inner wall of the container 20 and the upper plate 37 and the lower plate 33 is short or the flow rate of the raw water is large, it is possible to suppress the shielding of the space above the upper plate 37 and the space below the lower plate 33 by the raw water. That is, the water in which the solid chemical 36 is dissolved through the plurality of 2 nd openings 35 is easily discharged from the openings 24 of the bottom portion 22 through the space adjacent to the packing 38. Therefore, it is possible to prevent the solid chemical 36 from being excessively dissolved by the raw water staying on the solid chemical 36 side of the upper plate 37. That is, the water surface of the raw water moving from the 1 st opening 32 to the solid chemical 36 side through the plurality of 2 nd openings 35 can be stabilized, and a certain amount of the solid chemical 36 can be dissolved in the raw water.

Further, since the air above the upper plate portion 37 and the air below the lower plate portion 33 can move freely through the space adjacent to the spacer 38, the water in which the solid chemical 36 is dissolved can continuously drop from the upper plate portion 37 to the bottom portion 22. Therefore, since intermittent water dropping is suppressed, it is possible to suppress air in the container 20 from being sucked into and discharged to the outside of the container 20, and it is possible to suppress raw water having a negative pressure inside the container 20 and flowing into the solid-drug dissolver 30 more than necessary. Further, the negative pressure inside the container 20 can prevent raw water from flowing into the container 20 and dissolving the solid chemical 36 during the stop of the operation. That is, the water surface of the raw water moving from the 1 st opening 32 to the solid chemical 36 side through the plurality of 2 nd openings 35 can be stabilized, and a certain amount of the solid chemical 36 can be dissolved in the raw water.

The area of the spacer 38 surrounding the gap 34 is preferably 10% or more of the area of the outer periphery of the gap 34 formed by the outer periphery of the upper plate 37 and the outer periphery of the lower plate 33. That is, the area of the gasket 38 that blocks the flow of raw water is preferably 10% or more of the entire surface formed by the edge of the upper plate 37 and the edge of the lower plate 33. The area of the spacer 38 surrounding the gap 34 is more preferably 50% or more, still more preferably 80% or more, and particularly preferably 100% of the area of the outer periphery of the gap 34 formed by the outer periphery of the upper plate portion 37 and the outer periphery of the lower plate portion 33. As shown in fig. 8, when the area of the spacer 38 surrounding the gap 34 is 100%, the raw water flowing in the horizontal direction through the gap 34 from the 1 st opening 32 is completely blocked by the spacer 38 and is discharged through the plurality of 2 nd openings 35.

The size of the gap 34 between the upper plate portion 37 and the lower plate portion 33 is preferably 1mm to 15mm, and more preferably 2mm to 3 mm. That is, the distance between the upper plate portion 37 and the lower plate portion 33 is preferably 1mm to 15 mm. By setting the size of the gap 34 to 1mm or more, the raw water flowing through the gap 34 can be made to flow smoothly. Further, by setting the size of the gap 34 to 15mm or less, it is possible to suppress local dissolution of the solid drug 36 around the plurality of 2 nd openings 35 provided at a position closer to the water feeding unit 31 among the plurality of 2 nd openings 35.

(lower plate part 33)

The lower plate 33 has a 1 st opening 32 communicating with the water supply unit 31. The raw water fed through the water feeding unit 31 is fed into the container 20 through the 1 st opening 32 of the lower plate 33.

The shape of the lower plate portion 33 is not particularly limited, and in the embodiment of fig. 6, a disk-shaped solid drug 36 is used, and therefore, the lower plate portion has a circular shape so as to conform to the shape of the solid drug 36.

The size of the lower plate part 33 is not particularly limited, but since a solid drug 36 having a diameter of 70 to 80mm is often used, the diameter of the lower plate part 33 is preferably 70mm to 120 mm.

The position of the 1 st opening 32 provided in the lower plate portion 33 is not particularly limited, and the 1 st opening 32 is preferably disposed in the substantially central portion of the lower plate portion 33 from the viewpoint of uniformly dissolving the solid medicine 36.

The size of the 1 st opening 32 of the lower plate 33 is not particularly limited, but is preferably smaller than the inner diameter of the bypass pipe 50. Specifically, the size of the 1 st opening 32 of the lower plate 33 is preferably 1mm to 25mm, and more preferably 13mm to 22 mm. By setting the size of the 1 st opening 32 of the lower plate 33 within such a range, the dissolved concentration of the solid chemical 36 can be set within an appropriate range.

The shape of the 1 st opening 32 of the lower plate 33 is not particularly limited, and may be a polygon such as a circle, a triangle, or a quadrangle.

As shown in fig. 9, the lower plate portion 33 preferably has a 3 rd opening 39 disposed at a position different from the 1 st opening 32. By providing the 3 rd opening 39 in the lower plate 33, a part of the raw water flowing horizontally through the gap 34 from the 1 st opening 32 can be dropped toward the bottom 22 through the 3 rd opening 39. Therefore, even when the distance between the inner wall of the container 20 and the upper plate 37 and the lower plate 33 is short or the flow rate of the raw water is large, it is possible to suppress the shielding of the space above the upper plate 37 and the space below the lower plate 33 by the raw water. That is, the water in which the solid chemical 36 is dissolved through the plurality of 2 nd openings 35 is easily discharged from the opening 24 of the bottom 22 through the space on the inner wall side of the container 20 with respect to the upper plate 37 and the lower plate 33. Therefore, it is possible to prevent the solid chemical 36 from being excessively dissolved by the raw water staying on the solid chemical 36 side of the upper plate 37. That is, the water treatment apparatus 10 of the present embodiment can stabilize the water surface of the raw water moving from the 1 st opening 32 to the solid chemical 36 side, and can dissolve a certain amount of the solid chemical 36 in the raw water.

Further, since the air above the upper plate portion 37 and the air below the lower plate portion 33 can move freely through the space adjacent to the spacer 38, the water in which the solid chemical 36 is dissolved can continuously drop from the upper plate portion 37 to the bottom portion 22. Therefore, since intermittent water dropping is suppressed, it is possible to suppress air in the container 20 from being sucked into and discharged to the outside of the container 20, and it is possible to suppress raw water having a negative pressure inside the container 20 and flowing into the solid-drug dissolver 30 more than necessary. Further, the negative pressure inside the container 20 can prevent raw water from flowing into the container 20 and dissolving the solid chemical 36 during the stop of the operation. That is, the water treatment apparatus 10 of the present embodiment can stabilize the water surface of the raw water moving from the 1 st opening 32 to the solid chemical 36 side, and can dissolve a certain amount of the solid chemical 36 in the raw water.

In the embodiment of fig. 9, 2 openings 39 are provided between the 1 st opening 32 and the spacer 38 so as to sandwich the 1 st opening 32. However, at least 1 or more of the 3 rd opening 39 provided in the lower plate portion 33 may be provided. The shape and position of the 3 rd opening 39 are not particularly limited as long as a part of the raw water can pass through.

(Upper plate portion 37)

The upper plate 37 has a plurality of 2 nd openings 35. The raw water fed into the container 20 through the 1 st opening 32 of the lower plate 33 passes through the gap 34 formed by the upper plate 37 and the lower plate 33, and moves in the outer peripheral direction of the upper plate 37 and the lower plate 33. As shown by the arrows in fig. 6, a part of the raw water moves in the horizontal direction and is discharged from the gap 34 to the outside of the solid chemical dissolver 30, and the rest of the raw water overflows upward through the plurality of 2 nd openings 35 of the upper plate 37 to dissolve the solid chemical 36.

The shape of each of the 2 nd openings 35 among the plurality of 2 nd openings 35 is not particularly limited, and may be a polygon such as a circle, a triangle, or a quadrangle. The shape of each of the plurality of 2 nd openings 35 may be the same or different. The number of the 2 nd openings 35 is not particularly limited, and at least 2 or more of the 2 nd openings 35 may be provided in the upper plate portion 37. The number of the 2 nd openings 35 may be changed by comprehensively considering the size of the 2 nd openings 35, the flow rate of raw water, and the like, and is preferably 4 to 50, and more preferably 8 to 20. By setting the number of the 2 nd openings 35 in such a range, the solid chemical 36 can be suppressed from being locally dissolved.

The size of each of the 2 nd openings 35 in the plurality of 2 nd openings 35 is preferably smaller than the size of the 1 st opening 32 of the lower plate portion 33. Specifically, the size of each of the 2 nd openings 35 among the plurality of 2 nd openings 35 is preferably 0.1mm to 7mm, and more preferably 1mm to 5 mm. By setting the lower limit of the size of the 2 nd opening 35 to such a range, the amount of raw water discharged from the gap 34 without passing through the 2 nd opening 35 can be reduced. In addition, by setting the upper limit of the size of the 2 nd opening 35 to such a range, it is possible to suppress the occurrence of dissolution unevenness in the solid chemical 36 due to local contact of the raw water with the solid chemical 36. The sizes of the 2 nd openings 35 may be the same or different.

The size of the 2 nd opening 35 of the upper plate 37 is preferably smaller than the size of the 1 st opening 32 of the lower plate 33. Specifically, the size of the 2 nd opening 35 of the upper plate 37 is preferably 80% or less, more preferably 60% or less, and still more preferably 40% or less of the size of the 1 st opening 32 of the lower plate 33. By setting the size of the 1 st opening 32 of the lower plate 33 in such a range, the raw water can be prevented from locally contacting the solid chemical 36 and causing dissolution unevenness.

The upper plate 37 supports the solid drug 36. Specifically, the solid chemical 36 for purifying raw water is disposed on the side of the upper plate portion 37 opposite to the lower plate portion 33, and the solid chemical 36 is supported. The method for supporting the solid drug 36 is not particularly limited. In particular, in the present embodiment, even if the solid chemical 36 is simply placed on the upper plate portion 37, the flow of the raw water passing through the plurality of 2 nd openings 35 of the upper plate portion 37 is slight. Therefore, the solid chemical 36 is not easily washed away by the flow of the raw water even if a special fixing device is not provided on the upper plate portion 37. In addition, the distance between the inside of the container 20 and the edge of the lower plate 33 or the edge of the upper plate 37 of the solid medicine dissolver 30 in the direction perpendicular to the stacking direction of the upper plate 37 and the lower plate 33 is preferably 0.1mm to 10mm so that the solid medicine 36 is not easily dropped.

The solid chemical 36 is supported by the upper plate 37 of the solid chemical dissolver 30, and therefore is not always immersed in the raw water. Therefore, even when the flow of water in the water treatment device 10 is stopped, the chemical concentration in the purified water is less likely to increase excessively. Therefore, even if the water present inside the solid chemical dissolver 30 flows back and contacts the upstream water-scooping pump 70 or the like, oxidation of the water-scooping pump 70 by the chemical such as chlorine can be suppressed.

The positions of the plurality of 2 nd openings 35 provided in the upper plate portion 37 and the position of the 1 st opening 32 provided in the lower plate portion 33 are displaced in a direction perpendicular to the stacking direction of the upper plate portion 37 and the lower plate portion 33. That is, the positions of the plurality of 2 nd openings 35 provided in the upper plate portion 37 and the position of the 1 st opening 32 provided in the lower plate portion 33 are displaced in a direction perpendicular to the direction in which the upper plate portion 37 and the lower plate portion 33 face each other. In this case, the arrangement is shifted in the vertical direction, and the arrangement may be shifted in the substantially vertical direction, and need not be strictly in the vertical direction. Specifically, the positions of the plurality of 2 nd openings 35 of the upper plate 37 and the position of the 1 st opening 32 of the lower plate 33 do not coincide with each other in a plan view. For example, in the embodiment of fig. 6, the position of the 1 st opening 32 of the lower plate portion 33 is the central portion, whereas the plurality of 2 nd openings 35 of the upper plate portion 37 are provided at positions near the outer periphery that are offset from the central portion. By arranging the plurality of 2 nd openings 35 and the 1 st opening 32 of the lower plate 33 in this manner, when raw water conveyed through the water supply unit 31 collides with the upper plate 37, the momentum of the water flow is blocked, and the raw water changes to a horizontal flow through the gap 34. Then, the raw water flows horizontally through the gap 34, and a part of the raw water is branched again to flow upward through the plurality of 2 nd openings 35 of the upper plate 37. The raw water dissolves the solid chemical 36 to become purified water while flowing in the outer circumferential direction between the upper plate 37 and the solid chemical 36. The purified water purified by the solid chemical 36 is then scattered from the solid chemical dissolver 30, passes through the opening 24 of the bottom 22, and is discharged from the container 20 to the main pipe 40.

Here, when the upper plate 37 is not provided, or when the positions of the plurality of 2 nd openings 35 of the upper plate 37 and the 1 st openings 32 of the lower plate 33 are aligned, the raw water contacts the solid chemical 36 with its potential. Therefore, in the case of such a configuration, the solid chemical 36 is locally dissolved, and the amount of the dissolved solid chemical 36 may be increased more than necessary. However, in the present embodiment, the raw water passing through the water feeding unit 31 is not directly contacted with the solid chemical 36 with its momentum by the upper plate 37. Therefore, the solid drug 36 can be suppressed from being locally dissolved, and the solid drug 36 can be suppressed from being dissolved more than necessary.

(Main pipe 40)

As shown in fig. 10, one of the main pipes 40 is immersed in well water, and the other is connected to a water tap or the like inside the building. The main pipe 40 is provided with a suction pump 70 for sucking up raw water (well water) from the well, and a filter device 90 for filtering turbid components contained in the raw water. A part of the raw water pumped up by the water pump 70 is sent to a faucet or the like inside the building through the main pipe 40, and is used as domestic water by the user.

The main pipe 40 is connected to one of the bypass pipes 50 at a connection portion 41. The main pipe 40 is connected to the bottom 22 of the container 20 at a connection portion 42. That is, the main pipe 40 is arranged in parallel with the container 20 and the solid chemical dissolver 30. A part of the raw water pumped up by the water pump 70 and passed through the main pipe 40 passes through the bypass pipe 50 and the tank 20 from the connection portion 41, passes through the connection portion 42, and returns to the main pipe 40.

The main pipe 40 is provided with a suction pump 70 for sucking up raw water. The water-drawing pump 70 is not particularly limited as long as it can draw up raw water and send the raw water to the water treatment apparatus 10. As the water pump 70, for example, an automatic pump having a built-in pressure switch can be used. Specifically, the water pump 70 may be an automatic pump that operates when at least one of the flow rate adjustment unit 44 and the flow rate control unit 51, which will be described later, is opened.

Here, the water pump 70 generally has an impeller having blades in a housing. The water in the water pump 70 is pushed out from the center of the impeller toward the outer periphery while being applied to the blades by the rotation of the impeller. Then, the impeller imparts a rotational speed to the water, and the pressure rises due to the centrifugal force. At this time, since water flows from the center portion to the outer peripheral portion of the impeller, the pressure at the center portion of the impeller becomes low, and water at the inlet portion of the impeller is drawn in. The water pump 70 can discharge water by repeating this operation. However, in this case, water is required to be always present at the inlet of the impeller and the pipe on the suction side needs to be filled with water. Therefore, the water pump 70 is preferably configured as follows: by providing a check valve on the discharge side and a foot valve on the suction side, water in the suction pump 70 and the suction pipe (main pipe 40) does not fall even when the suction pump 70 is stopped.

(flow rate adjusting part 44)

In the embodiment of fig. 10, a flow rate adjusting unit 44 is provided inside the main pipe 40 between the connection unit 41 and the connection unit 42. The flow rate adjusting unit 44 can adjust the flow rate of raw water flowing through the main pipe 40.

The flow rate adjusting unit 44 is not particularly limited as long as it can adjust the flow rate of raw water. The flow rate adjusting unit 44 may use an on-off valve, an orifice, a venturi tube, a filter device, or the like. These flow rate adjusting portions 44 can feed the raw water to the bypass pipe 50 by narrowing the flow path through which the raw water passes and generating a water pressure difference before and after the flow rate adjusting portions 44.

(check valve 43)

The water treatment apparatus 10 of the present embodiment preferably includes a check valve 43 that is disposed in parallel with the solid chemical dissolver 30 or downstream of the solid chemical dissolver 30 and prevents reverse flow. By providing the check valve 43 in the water treatment apparatus 10, even when the suction pump 70 and the like are disposed upstream of the main pipe 40, for example, corrosion can be prevented without being exposed to a high concentration of chemical. For example, oxidation of the seal portion and the impeller portion of the water scooping pump 70 by the solid chemical 36 such as a chlorine chemical can be suppressed.

As shown in fig. 6, the water treatment apparatus 10 according to the present embodiment preferably further includes a main pipe 40 disposed in parallel with the container 20 and the solid chemical dissolver 30, and a check valve 43 provided in the main pipe 40. Specifically, the check valve 43 is disposed between the connection portion 41 and the connection portion 42 and upstream of the flow rate adjustment portion 44. The water treatment apparatus 10 is provided with such a check valve 43, so that the check valve 43 is not always easily eroded by a high concentration chemical. Therefore, the check valve 43 requires less measures such as expensive titanium, and the cost of the water treatment apparatus 10 can be reduced.

Further, an air layer is present between the solid medicine 36 and the lid 21 inside the container 20. Therefore, when a reverse flow occurs from the inside of the water pump 70, the water inside the main pipe 40 flows backward through the flow rate adjusting unit 44 such as an orifice, for example, as compared with the water inside the container 20. Therefore, the check valve 43 can suppress the inflow of the purified water containing the chemical such as chlorine at a high concentration into the water scooping pump 70.

(bypass piping 50)

The bypass pipe 50 is disposed upstream of the container 20. In the embodiment of fig. 6, one side of the bypass pipe 50 is connected to the main pipe 40 at the connection portion 41, and the other side of the bypass pipe 50 is connected to one side of the water supply portion 31. A part of the raw water passing through the main pipe 40 is sent to the inside of the tank 20 through the bypass pipe 50.

The bypass pipe 50 can be provided with a flow rate control unit 51 as a flow rate adjustment mechanism for adjusting the flow rate of raw water. As the flow rate control unit 51, for example, an on-off valve can be used. The well water as the raw water can be pumped up by operating the suction pump 70 with the flow rate control unit 51 provided in the bypass pipe 50 in an open state and the on-off valve as the flow rate adjustment unit 44 provided in the main pipe 40 in a closed state.

(flow rate adjusting part 52)

As shown in fig. 6, the bypass pipe 50 is preferably provided with a flow rate adjusting unit 52 as a flow rate adjusting mechanism for adjusting the flow rate of raw water. The flow rate adjusting portion 52 has a mechanism that does not open when a certain water pressure is not applied.

For example, when a small amount of purified water flows, the amount of water remaining in the main pipe 40 is often several liters to several tens liters, and the necessary solid chemical 36 is often sufficient if there is purified water that flows out through the wall surface of the solid chemical dissolver 30 after the water tap is closed. However, even when a small amount of purified water is required for washing hands or the like, the raw water passes through the bypass pipe 50 to dissolve the solid chemical 36, and therefore the chemical concentration of the purified water used as the domestic water may be high.

However, according to the flow rate adjusting portion 52, when the amount of water passing through the bypass pipe 50 is small, the raw water can be prevented from reaching the solid chemical 36. Therefore, the solid chemical 36 can be prevented from dissolving more than necessary and the chemical concentration of the purified water can be prevented from increasing.

Specifically, the water treatment apparatus 10 of the present embodiment further includes a bypass pipe 50 connected to one of the water supply units 31, and a flow rate adjustment unit 52 provided in the bypass pipe 50. The flow rate adjusting unit 52 includes a water stop portion 52i, a sealing portion 52a provided in the bypass pipe 50 so as to be capable of sealing with the water stop portion 52i, and an elastic body 52h supported by the water stop portion 52 i. The flow rate adjusting portion 52 further includes a bypass pipe side supporting portion 52c provided on the downstream side of the sealing portion 52a in the bypass pipe 50 and supporting the elastic body 52 h.

The water stop portion 52i has a function of intercepting the raw water flowing to the bypass pipe 50. The water stop portion 52i includes a shielding portion 52e, a sealing portion 52f, and an elastic body support portion 52 g.

The shielding portion 52e is disposed on the upstream side of the bypass pipe 50 in the water stop portion 52i, and shields the passage of the raw water in the bypass pipe 50 to stop the raw water in the bypass pipe 50.

When the amount of water flowing through the bypass pipe 50 is small, the sealing portion 52f can be sealed without a gap from the sealing portion 52a of the bypass pipe 50, and can stop the raw water flowing through the bypass pipe 50. At this time, in order to prevent a very small amount of water from leaking between the bypass pipe 50 and the water stop portion 52i, an elastic body 52d such as a rubber O-ring is preferably disposed between the sealing portion 52f of the water stop portion 52i and the sealing portion 52a of the bypass pipe 50.

The elastic body support portion 52g supports the elastic body 52h and receives a resilient force from the elastic body 52 h. Elastic body support portion 52g has a side wall portion and a bottom wall portion, and is formed in a U-shape in cross section by the side wall portion and the bottom wall portion. Elastic body support portion 52g is disposed so as to accommodate elastic body 52 h.

The sealing portion 52a is provided in the bypass pipe 50 so as to be able to seal with the water stop portion 52 i. In the embodiment of fig. 6, the sealing portion 52a is formed so that the diameter of the bypass pipe 50 gradually increases with respect to the inlet of the flow rate adjusting portion 52.

The connection portion 52b is provided in the bypass pipe 50, and connects the downstream side of the sealing portion 52a to the upstream side of the bypass pipe side support portion 52 c. In the embodiment of fig. 6, the connection portion 52b is arranged in parallel with the bypass pipe 50 in front of and behind the flow rate adjustment portion 52 in cross-section.

The bypass pipe side support portion 52c is provided downstream of the sealing portion 52a in the bypass pipe 50, and supports the elastic body 52 h. In the embodiment of fig. 6, the bypass pipe side support portion 52c is disposed perpendicular to the water flow direction of the bypass pipe 50 in cross section. That is, the angle formed by the connecting portion 52b and the bypass pipe side supporting portion 52c is about 90 degrees. However, the angle formed by the connection portion 52b and the bypass pipe side support portion 52c is not particularly limited, and is preferably 70 degrees to 120 degrees. The diameters of the bypass pipes 50 on the upstream side and the downstream side of the flow rate adjusting portion 52 are substantially the same. One of the bypass pipe side supporting portions 52c is connected to the downstream side of the connecting portion 52b, and the other of the bypass pipe side supporting portions 52c is connected to the bypass pipe 50 on the downstream side of the flow rate adjusting portion 52.

The elastic body 52h is supported by the elastic body support portion 52 g. The elastic body 52h has a function of springing back with the bypass pipe side support portion 52c of the bypass pipe 50 as a fulcrum, and pushing back the water stop portion 52i to the upstream side of the bypass pipe 50 via the elastic body support portion 52 g. In the embodiment of fig. 6, a coil-shaped spring is used as the elastic body 52h, but the present invention is not particularly limited as long as the water stop portion 52i can be pushed back.

Next, a mechanism of stopping the raw water by the flow rate adjusting unit 52 when the amount of raw water flowing through the bypass pipe 50 is small will be described with reference to fig. 11A and 11B.

Fig. 11A shows a state of the flow rate adjusting unit 52 when the amount of raw water flowing through the bypass pipe 50 is small. Fig. 11B shows a state of the flow rate adjusting unit 52 when the amount of raw water flowing through the bypass pipe 50 is equal to or greater than a predetermined amount.

As shown in fig. 11A, when the flow rate of raw water flowing through the bypass pipe 50 is small, the elastic body 52h has a larger pressure of rebounding than the water pressure acting on the water stop portion 52i, and therefore the raw water cannot flow beyond the water stop portion 52i due to the rebounding force of the elastic body 52 h.

On the other hand, as shown in fig. 11B, when the amount of raw water flowing through the bypass pipe 50 is equal to or greater than the predetermined amount, the elastic body 52h has a smaller pressure of rebounding than the water pressure acting on the water stop portion 52 i. Therefore, the elastic body 52h contracts, and a gap is generated between the sealing portion 52a of the bypass pipe 50 and the sealing portion 52f of the water stop portion 52 i. Therefore, the raw water can flow through the bypass pipe 50 through the gap.

Even if a small amount of purified water is continuously used and no raw water is supplied to the water treatment apparatus 10, the water-drawing pump 70 is turned on again if the water pressure drops, and the raw water is supplied to the solid chemical 36 through the bypass pipe 50. Therefore, the chemical concentration of the purified water can be maintained at an appropriate value. When a small amount of purified water is continuously used, the pressure in the pipe from the vicinity of the faucet gradually approaches the atmospheric pressure, so that a pressure difference occurs before and after the orifice serving as the flow rate adjusting unit 44, and the raw water starts flowing in the bypass pipe 50. Therefore, the chemical concentration of the purified water can be set within an appropriate range not only when the water suction pump 70 is used from well water or the like but also when water in the city water supply line is treated.

(Filter 90)

As shown in fig. 10, the filter device 90 can be disposed downstream of the solid drug dissolver 30 in the main pipe 40. The filtration device 90 is a device for removing iron hydroxide from the primary treated water in which iron ions in the raw water are precipitated as iron hydroxide by the solid chemical dissolver 30. Such a filter device 90 includes a filter medium for removing iron hydroxide therein. As the filter medium, inexpensive filter sand can be used. As the filter medium of the filter device 90, manganese sand coated with hydrated manganese dioxide can also be used. By using manganese sand as the filter medium, not only iron hydroxide but also manganese present in the primary treated water can be removed.

Specifically, the raw water is first pumped up by the water pump 70 or the like, and the pumped up raw water passes through the main pipe 40, the connection portion 41, the bypass pipe 50, and the inside of the solid chemical dissolver 30 to come into contact with the solid chemical 36. Thereby, the solid chemical 36 is dissolved in the raw water.

When a chlorine-based chemical is used as the solid chemical 36, divalent iron in the raw water is oxidized into insoluble iron hydroxide (fe (oh))₃). In the case of groundwater, iron may be present as iron bicarbonate (Fe (HCO)₃)₂) However, as shown in the reaction formula (2), the iron hydroxide is oxidized by the chlorine-containing chemical to become insoluble.

2Fe²⁺+Cl₂+6H₂O→2Fe(OH)₃+6H⁺+2Cl^－(1)

2Fe(HCO₃)₂+Cl₂+2H₂O→2Fe(OH)₃+4CO₂+2HCl (2)

The primary treated water oxidized by the solid chemical dissolver 30 passes through the connection portion 42 and the main pipe 40, and reaches the filter device 90. The secondary treated water filtered by the filtering apparatus 90 is used as domestic water by the user.

In addition, when the solid chemical 36 is not a chlorine-based chemical but a coagulant, the filter is exposed to a high concentration of the coagulant, and thus mud pill (mud ball) formation of the filter is promoted. Therefore, it is preferable to provide a layer of anthracite or activated carbon upstream of the filter so that the filter (manganese) is not exposed to a high concentration of the coagulant. The mud pellets are obtained by solidifying garbage, plankton, and the like in raw water together with filter sand in the form of pellets, and cause fatal troubles in the function of removing turbid materials from the filter.

Further, a coagulant supply device for supplying a coagulant to the water to which the chlorine-based chemical is supplied may be disposed upstream of the filter device 90. The flocculant is capable of forming flocs by aggregating colloids and the like formed by the oxidizing agent. The formed flocs can be easily removed by a filtration apparatus 90 or the like.

The flocculant is not particularly limited, and examples thereof include an aluminum flocculant and an iron flocculant. Examples of the aluminum-based coagulant include aluminum chloride and aluminum sulfate. Examples of the iron-based coagulant include ferrous sulfate (FeSO)₄) Iron (Fe) sulfate₂(SO₄)₃) Iron chloride (FeCl)₃) And iron polysulfate ([ Fe ]₂(OH)_n(SO₄)_3－n/2]_m) And a polysilicate iron flocculant ([ SiO ]₂]_n·[Fe₂O₃]) And the like.

As described above, the water treatment apparatus 10 according to the present embodiment includes the container 20 and the solid chemical dissolver 30 housed in the container 20. The solid drug dissolver 30 includes: a water supply unit 31 for supplying raw water from the outside of the container 20; a lower plate part 33 having a 1 st opening part 32 communicating with the water feeding part 31; and an upper plate portion 37 which is disposed to face the lower plate portion 33 with a gap 34 therebetween, has a plurality of 2 nd openings 35, and supports the solid medicine 36. The solid-drug dissolver 30 includes a spacer 38, and the spacer 38 is disposed so as to surround the gap 34 through which the raw water flows from the 1 st opening 32 through the plurality of 2 nd openings 35. The positions of the plurality of 2 nd openings 35 provided in the upper plate portion 37 and the position of the 1 st opening 32 provided in the lower plate portion 33 are shifted from each other in a direction perpendicular to the stacking direction of the upper plate portion 37 and the lower plate portion 33. Therefore, according to the present embodiment, the water treatment apparatus 10 can be obtained which can purify raw water (water to be treated) by finely controlling the chemical concentration.

[ Water treatment System 100]

The water treatment system 100 according to the present embodiment will be described with reference to embodiments 1 to 4, but the present embodiment is not limited to these embodiments. The same components as those in the above embodiment are assigned the same reference numerals, and redundant description is omitted.

As shown in fig. 12, the water treatment system 100A of the present embodiment includes a water treatment device 10, a water-drawing pump 70, a filter device 90, and a coagulant supply device 61. In the present embodiment, the solid chemical 36 is a chlorine-based chemical.

The water pump 70 is disposed upstream of the solid chemical dissolver 30 in the main pipe 40. As described above, the suction pump 70 is used to suck up raw water.

The filter device 90 is disposed downstream of the solid chemical dissolver 30 in the main pipe 40. The filter device 90 can use the filter device described above.

The coagulant supply device 61 is provided in the second bypass pipe 62 disposed on the upstream side of the filter device 90. The coagulant supply device 61 supplies the coagulant to the water to which the chlorine-based chemical is supplied. The above-mentioned coagulant can be used as the coagulant.

The water treatment device 10 includes a main pipe 40 disposed in parallel with the container 20 and the solid chemical dissolver 30, a first bypass pipe 50 (bypass pipe 50) connected to one of the water supply units 31, and a connection pipe 55 having one end connected to the container 20. The upstream side of the second bypass pipe 62 is connected to the first bypass pipe 50.

Specifically, the main pipe 40 is disposed in parallel to each of the first bypass pipe 50 and the connection pipe 55. An upstream end of the first bypass pipe 50 is connected to the main pipe 40 at a connection portion 41. The downstream end of the first bypass pipe 50 is connected to the water supply unit 31. The upstream end of the connection pipe 55 is connected to the bottom 22 of the container 20. The downstream end of the connection pipe 55 is connected to the main pipe 40 at the connection portion 42.

The second bypass pipe 62 is disposed in parallel with the first bypass pipe 50 and the connection pipe 55. An upstream end of the second bypass pipe 62 is connected to the upstream side of the tank 20 in the first bypass pipe 50 at a connection portion 63. The downstream end of the second bypass pipe 62 is connected to the downstream side of the container 20 in the connection pipe 55 at a connection portion 64.

A part of the raw water pumped up by the water pump 70 and passed through the main pipe 40 passes through the first bypass pipe 50 via the connection portion 41 and is supplied to the solid chemical dissolver 30. The water to which the chlorine-based chemical is supplied from the solid chemical dissolver 30 passes through the connection pipe 55. Meanwhile, a part of the raw water passing through the first bypass pipe 50 passes through the second bypass pipe 62 via the connection portion 63 and is supplied to the coagulant supply device 61. The water supplied with the coagulant by the coagulant supply device 61 passes through the second bypass pipe 62. The water to which the chlorine-based chemical is supplied and the water to which the coagulant is supplied are mixed in the connection pipe 55 downstream of the connection portion 64, and are returned to the main pipe 40 via the connection portion 42.

In the present embodiment, the flow rate adjusting portion 44 may be provided between the connection portion 41 and the connection portion 42 in the main pipe 40. In the present embodiment, the flow rate control portion 51 and the flow rate control portion 66 may be provided in the first bypass pipe 50 and the second bypass pipe 62, respectively. The flow rate control unit 66 may have the same configuration as the flow rate control unit 51.

As described above, the water treatment system of the present embodiment includes: a water treatment device; a water suction pump disposed upstream of the solid chemical dissolver in the main pipe and sucking up raw water; and a filter device disposed downstream of the solid chemical dissolver in the main pipe. The water treatment system further includes a coagulant supply device that is provided in a second bypass pipe disposed on the upstream side of the filter device and that supplies the coagulant to the water to which the chlorine-based chemical has been supplied. The water treatment device is provided with a main pipe arranged in parallel with the container and the solid chemical dissolver, a first bypass pipe connected with one side of the water supply part, and a connecting pipe connected with the container at one end, wherein the solid chemical is chlorine chemical. The upstream side of the second bypass pipe is connected to the first bypass pipe. Therefore, according to the present embodiment, the flow rate of the raw water flowing through the first bypass pipe 50 and the second bypass pipe 62 can be adjusted only by the flow rate adjusting unit 44 without using 2 pressure adjusting units. Therefore, a water treatment system with low manufacturing cost can be provided.

(embodiment mode 2)

Next, a water treatment system 100B according to embodiment 2 will be described with reference to fig. 13. The same components as those in the above embodiment are assigned the same reference numerals, and redundant description is omitted. In embodiment 2, in addition to embodiment 1, a check valve 67 for preventing a reverse flow of water is provided downstream of the coagulant supply device 61 in the second bypass pipe 62.

In the water treatment system 100B, the second bypass pipe 62 is disposed in parallel with the first bypass pipe 50 and the connection pipe 55, and a check valve 67 for preventing a reverse flow of water is provided downstream of the coagulant supply device 61 in the second bypass pipe 62. Therefore, even when the water containing the chlorine based chemical flows in a direction opposite to the original flow direction due to the balance of the valve opening degree or the like, the water containing the chlorine based chemical can be prevented from flowing back to the coagulant supply device 61. Therefore, even if a material having low resistance to chlorine-based chemicals is used for the coagulant supply device 61, oxidative degradation of the coagulant supply device 61 can be suppressed. Even in the case where a chlorine-based chemical reacts with a coagulant to generate harmful chlorine gas or the like, the generation of such gas can be suppressed.

(embodiment mode 3)

Next, a water treatment system 100C according to embodiment 3 will be described with reference to fig. 14. The same components as those in embodiment 1 are denoted by the same reference numerals, and redundant description thereof is omitted. In embodiment 3, the main pipe 40 is connected to the downstream side of the connection pipe 55. Further, the downstream side of the second bypass pipe 62 is connected to the main pipe 40. Further, the connection portion 42 between the downstream side of the connection pipe 55 and the main pipe 40 is arranged at a position different from the connection portion 64 between the downstream side of the second bypass pipe 62 and the main pipe 40.

Specifically, the downstream end of the connection pipe 55 is connected to the main pipe 40 at the connection portion 42. Further, a downstream end of the second bypass pipe 62 is connected to the main pipe 40 at a connection portion 64. The connection portion 42 and the connection portion 64 are disposed at different positions in the main pipe 40.

In the water treatment system 100C, the main pipe 40 is connected to the downstream side of the connection pipe 55, and the main pipe 40 is connected to the downstream side of the second bypass pipe 62. Further, the connection portion 42 between the downstream side of the connection pipe 55 and the main pipe 40 is arranged at a position different from the connection portion 64 between the downstream side of the second bypass pipe 62 and the main pipe 40. Therefore, the coagulant is less likely to be mixed into the first bypass pipe 50, and the reaction between the chlorine-containing chemical and the coagulant can be suppressed. Since such side reactions are suppressed, metal ions in the raw water can be sufficiently oxidized in the first bypass pipe 50.

Further, the connection portion 42 between the downstream side of the connection pipe 55 and the main pipe 40 is preferably disposed upstream of the connection portion 64 between the downstream side of the second bypass pipe 62 and the main pipe 40. The metal ions in the raw water are more likely to be aggregated by the aggregating agent in an oxidized state. Therefore, by adopting such an arrangement, the metal component that is oxidized to be in a colloidal state can be aggregated, and the efficiency of removing the turbid component can be improved.

(embodiment mode 4)

Next, a water treatment system 100D according to embodiment 4 will be described with reference to fig. 15. The same components as those in the above embodiment are assigned the same reference numerals, and redundant description is omitted. In embodiment 4, in addition to embodiment 3, a check valve 67 for preventing a reverse flow of water is provided downstream of the coagulant supply device 61 in the second bypass pipe 62.

In embodiment 4, by providing such a check valve 67, even when the water containing the chlorine-based chemical flows in the reverse direction due to the balance of the valve opening degree or the like, the water containing the chlorine-based chemical can be prevented from flowing back to the coagulant supply device 61. Therefore, even when a material having low resistance to chlorine-based chemicals is used for the coagulant supply device 61, oxidative degradation of the coagulant supply device 61 can be suppressed. Even in the case where a chlorine-based chemical reacts with a coagulant to generate harmful chlorine gas or the like, the generation of such gas can be suppressed.

The entire contents of Japanese patent application No. 2017-162165 (application date: 8/25/2017) are incorporated herein by reference.

The contents of the water treatment apparatus and the water treatment system according to the present embodiment have been described above, but the present embodiment is not limited to these descriptions, and it is obvious to those skilled in the art that various modifications and improvements can be made.

Industrial applicability

According to the present invention, a water treatment apparatus and a water treatment system using the water treatment apparatus can be obtained which can purify water by finely controlling the chemical concentration of the water to be treated.

Description of the reference symbols

10 Water treatment device

20 container

30 solid medicament dissolver

31 water supply part

32 st opening part

33 lower plate part

34 gap

35 plural 2 nd openings

36 solid medicine

37 upper plate part

38 liner

39 No. 3 opening part

40 Main piping

43 check valve

50 first bypass piping (bypass piping)

52 flow rate adjusting part

52a sealing part

52c bypass pipe side support

52h elastomer

52i water stop

55 connecting pipe

61 agglutinant supply device

62 second bypass pipe

67 check valve

70 water drawing pump

90 filtering device

Claims

1. A water treatment device, characterized in that,

have:

container; and

The solid chemical dissolver includes a water supply part, a lower plate part, an upper plate part, and a gasket, and is accommodated in the container, the water supply part conveys raw water from the outside of the container, and the lower plate part has a first communication with the water supply part. an opening, wherein the upper plate part and the lower plate part are arranged to face each other with a gap therebetween, have a plurality of second openings, and support a solid drug, and the spacer allows the raw water to pass through the plurality of openings from the first opening. It is arranged in such a manner as to be surrounded by the above-mentioned gaps that flow through each of the second openings;

The positions of the plurality of second openings provided in the upper plate portion and the positions of the first openings provided in the lower plate portion are shifted in a direction perpendicular to the stacking direction of the upper plate portion and the lower plate portion. configuration.

2. The water treatment device according to claim 1, characterized in that,

Also has:

The main piping is arranged in parallel with the container and the solid drug dissolver; and

A check valve is provided in the said main piping.

3. The water treatment device according to claim 1 or 2, characterized in that,

The size of each of the plurality of second openings is smaller than the size of the first opening of the lower plate portion.

4. The water treatment apparatus according to any one of claims 1 to 3, wherein

The size of the first opening of the lower plate portion is 1 mm or more and 25 mm or less.

5. The water treatment apparatus according to any one of claims 1 to 4, wherein

The size of the gap between the upper plate portion and the lower plate portion is 1 mm to 15 mm.

6. The water treatment apparatus according to any one of claims 1 to 5, wherein

Also has:

Bypass piping connected to one of the above-mentioned water supply units; and

The flow regulating part is installed in the above-mentioned bypass piping;

The flow rate adjustment portion includes a water stop portion, a sealing portion, an elastic body, and a bypass piping side support portion, the sealing portion is provided on the bypass piping so as to be able to seal the space between the sealing portion and the water stop portion, and the elastic body is supported. In the said water stop part, the said bypass piping side support part is provided in the said bypass piping on the downstream side rather than the said sealing part, and supports the said elastic body.

7. The water treatment apparatus according to any one of claims 1 to 6, wherein

The area of the spacer surrounding the gap is 10% or more of the area of the outer circumference of the gap formed by the outer circumference of the upper plate portion and the outer circumference of the lower plate portion.

8. The water treatment apparatus according to any one of claims 1 to 7, wherein

The said lower plate part has the 3rd opening part arrange|positioned in the position different from the said 1st opening part.

9. A water treatment system, characterized in that,

have:

The water treatment apparatus according to any one of claims 1 to 8, further comprising a main pipe, a first bypass pipe, and a connection pipe, wherein the main pipe is arranged in parallel with the container and the solid chemical dissolver, and the first A bypass pipe is connected to one of the water supply parts, one end of the connection pipe is connected to the container, and the solid chemical is a chlorine-based chemical;

a pumping pump, which is arranged on the upstream side of the above-mentioned solid chemical dissolver in the above-mentioned main piping, and draws up the raw water;

a filter device disposed on the downstream side of the solid chemical dissolver in the main piping; and

a flocculant supply device provided on the second bypass pipe arranged on the upstream side of the filter device, and supplying a flocculant to the water to which the chlorine-based chemical was supplied;

The upstream side of the second bypass pipe is connected to the first bypass pipe.

10. The water treatment system of claim 9, wherein

The downstream side of the connection piping is connected to the main piping;

the downstream side of the second bypass piping is connected to the main piping;

The connection part between the downstream side of the said connection piping and the said main piping is arrange|positioned in the position different from the connection part between the downstream side of the said 2nd bypass piping and the main piping.

11. The water treatment system of claim 9 or 10, wherein

The second bypass piping is arranged in parallel with the first bypass piping and the connection piping;

A check valve for preventing backflow of the water is provided downstream of the flocculant supply device in the second bypass pipe.