TW527204B - Solid-liquid filtering method and apparatus for sewage, waste water and the like - Google Patents

Abstract

A solid-liquid filtering method and system which comprises a thick band (7) of assembled filaments prepared by closely arranging paralleled monofilaments of predetermined length, a means for fixing (11) one end portion of said band and a network support (4) for keeping said band in a plane situation at proper location when said band is forced to turn in a regular direction, one end portion of said monofilaments being fixed and the other end portion being floated.

Description

527204 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the Invention (1) Background of the IU Field of the Invention The present invention relates to a solid-liquid filtration method and device for supplying sewage and wastewater. 1L know-how According to a traditional solid-liquid filtration process, the solids contained in the liquid are filtered out through a porous filtering medium such as woven fabric, gauze or mesh, knitwear, penetrable membranes, and the like. Through the loading, pressing, discharging, centrifugation, etc., the water to be filtered passes from one side to the other through the filtering medium \ Therefore, if the solid particles are larger than the pore size, the solid can be captured by the pores. In the conventional apparatus for performing the aforementioned filtration process, basically, the liquid system is forced to pass through a filter from one side to the other. Depending on the type of liquid to be filtered, the average solid particle size in the liquid will vary, and each filter medium has its inherent pore size within a certain range. When a liquid contains solids with multiple particle sizes, it is necessary to replace the filter media with an increased or decreased particle size. Further, if the filtering medium is not replaced, the liquid to be filtered will be prohibited by a specific filtering device, thereby inconveniently reducing the applicability of the filtering device. The filtered solid particles will gradually accumulate on the filtering medium as the filtering process progresses, and cause the filter to be blocked. This blocking condition reduces the filtering effect and eventually stops filtering. Since the liquid system is forced through the filter medium as described above, the solids are tightly captured by the filter pores. The finer the solid particles, the more often this blockage occurs. This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) $-(Please read the precautions on the back before filling in this purchase)-· "

-4-Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 527204 A7 B7 V. Description of the Invention (2) From the point of view of operation, the use of a filter medium to its maximum filtration limit is uneconomical, inefficient, and It is impractical because the medium cannot be reused. For this reason, clogged filter media is usually rinsed to remove filtered solid particles and reused repeatedly. In order to solve the problem caused by clogging, a fixed filtering medium is forced to pass the washing water through the medium in the backward direction, so-called rewashing is performed, or a clogged solid is forced out by a conventional device and forced out. Suck out. Although rewashing is a simple and convenient way to deal with clogging, when the pore size of the filter medium is relatively small, or when solid particles are excessively fine or tightly adhered to the medium, this treatment must be made with high water pressure. Use plenty of water for a long time. Sometimes, the filter medium is used continuously, even under inefficient conditions as described above, or inevitably, it is necessary to shorten the washing cycle. On the other hand, the application of a specific device for washing increases production costs and reduces work efficiency. According to the present invention, solids equivalent to ultrafine particles can be filtered out through a new filtering medium, and can be easily and completely washed through a conventional rewashing. The present invention provides a novel solid-liquid filtration method and device that goes beyond the traditional filtration concept. One aspect of the present invention is to provide a solid-liquid filtration method, in which a filtered liquid system is passed through a thick multi-filament net of assembled monofilaments to maintain the direction of the monofilaments through the supply of liquid. Filter out and capture solids. The multi-mesh includes tightly parallel monofilaments of a predetermined length. One end of the paper size is in accordance with China National Standard (CNS) A4 (210X297 male feet) ~ -5- --- ------ install I, one-^ --- order ------, line 丨 > 丨 (Please read the precautions on the back before filling this page) 527204 A7 B7 V. Description of the invention (3 ) The part is fixed, and the other end part is floating. Only when each single filament is forced to rotate in a regular direction, a multiple net is maintained at a suitable position by a bracket. The condition of the plane. Another object of the present invention is to provide a solid-liquid filtering device, which includes a thick assembled monofilament multi-mesh prepared from closely arranged parallel monofilaments of a predetermined length for fixing one of the multi-mesh A mechanism at the end part, and a network support, when the multiple nets are forced to rotate in a regular direction, to maintain the multiple nets in a proper position at a suitable position, one end of the single filament One part is fixed and the other end part is floatable. Brief Description of the Drawings Fig. 1 is a perspective view of a solid-liquid filtering device of the present invention. Fig. 2 is a perspective view of a filtering medium of a solid-liquid filtering device of the present invention. Fig. 3 is a partially enlarged side view of one of the short side portions of the filtering medium of Fig. 2 (taken on the line I I I-I I I in Fig. 2). Fig. 4 is a schematic cross-sectional view of the solid-liquid filtering device of the present invention under a rewash condition. Fig. 5 is a schematic diagram showing a solid-liquid filtering device according to another embodiment of the present invention. Noon components comparison table 1 Structure This paper size applies to Chinese National Standard (CNS) Α4 specification (210X297 mm) (Please read the precautions on the back before filling this page)

, 1T Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -6-527204 A7 B7 V. Description of Invention (4) 2 345678 9 0

A Upper cover Lower cover Wire mesh screen Extension tube accessories Filter media fiber Single fiber screw rod sleeve clamp Rewash water overlapping width --------- Install IΓ (Please read the precautions on the back before filling this page) _ Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's consumer co-operative cooperative for washing ί Detailed description of the embodiment of Xia Ling According to the present invention, a gap is formed between each of the contact surfaces that are closely adjacent to each other in a single filament. Fine pores in traditional filtration media. A filtering surface can be controlled by changing the diameter of the monofilament, and thus, its thickness can be selected depending on the particle size of the solid to be filtered out. Fine filtration comparable to membrane or ultrafiltration can be performed via ultra-fine monofilaments. The aforementioned new form of filtering medium allows _ easy to perform high water ¥ filtration, and can also perform its backwash (back_ η g) quite simply and completely. Since only one part of the early M silk is fixed, the other. Jgjj g | 7 This paper size is applicable. National National Standard (CNS) A4 specification (21〇 × 297 mm) 7 Employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative 527204 A7 B7 V. Description of the invention (5) Releasing water is released from a network bracket. The rewashing water is supplied in the backward direction of the filtered water flow, and the washing water allows single fibers. The silk was forced to float and spread inside. Due to the distance between each filter surface, they are forced to be dispersed by the washing water, and the solid particles captured on the multiple meshes of one of the assembled monofilaments can be released without difficulty during the process Therefore, the filtering medium can be easily regenerated. As mentioned before, the filtration method and device can be washed and regenerated by conventional rewashing in any case, and the filtration medium can be washed and regenerated quite easily and completely, and the level of membrane or ultrafiltration can be maintained. The monofilament used in the present invention may be a monofilament made of traditional materials, including plastic, carbon fiber, and metal fiber. Of course, a suitable specific material should be selected for the characteristics of the water to be filtered. The present invention does not specifically limit the thickness of the monofilaments, but excessively thick monofilaments will reduce the working efficiency because less contact surfaces are formed therebetween, and are not suitable for the high-level filtration of the present invention. For the purpose of carrying out the horizontal filtering of the present invention, although a single filament with a reduced thickness can increase the efficiency of many operations, the diameter of the single filament is preferably 0.3 mm or less. Further, the network support for assembling single filaments, except for certain technical applications (for example, one of the meshes is not larger than the thickness of the single filaments to prevent intrusion into the network). The present invention does not As a limitation, the stent is made of a material that can be subjected to liquids and the like to be filtered. According to the present invention, by simply supplying backwash water in a backward direction toward the liquid flow, the filtering medium can be washed and regenerated, and the technical paper size resulting from the backwash can be adapted to the Chinese National Standard (CNS) A4 specification (210X297 mm) ) --------- Installation—LI-# --- Order ------ ^ Line as (Please read the precautions on the back before filling this page) -8- 527204 A7 B7 V. Invention Explanation (6) Minimal technical and economic inconvenience. The step of rewashing can be repeated during the filtration process without worrying about loss of efficiency. In other words, the introduction of this rewashing step will not seriously affect the filtration process. The most characteristic feature of the present invention is a simple and complete rewash. As mentioned above, the multiple nets assembled by single filaments are effectively used in the present invention as a new form of filtering media, and can also function as a butterfly valve traditionally used in similar methods and devices. Theoretically, both ends of the filter medium can be fixed during filtration, one of these ends can be released in a second rewash step, and then fixed again to continue further filtration. However, this procedure is not practical and is contrary to the spirit of the present invention. Examples The present invention will be further illustrated by the following examples with reference to the drawings. FIG. 1 is a perspective view of a solid-liquid filtering device of the present invention, FIG. 2 is a perspective view of a filtering medium of the solid-liquid filtering device of the present invention, and FIG. 3 is a short side portion of the filtering medium shown in FIG. 2 A partially enlarged side view (taken on line III-III in Figure 2). In Figure 1, a series of assembled monofilament multiple nets are partially removed for better understanding. The number 1 represents a cylindrical basket-like frame made of stainless steel as part of the present invention. Frame 1 is approximately 450 mm in length and approximately 140 mm in diameter. The top and bottom openings of the frame 1 are provided with stainless steel sealing covers 2 and 3, and the paper size of approximately 1 cm mesh extending thereon is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) ( (Please read the notes on the back before filling out this page),?

I Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -9- 527204 A7 B7 V. Description of the invention (7) Stainless steel wire screen 4. The upper cover 2 is provided with a fitting 6 for detachably connecting with an extension tube 5. The number 7 represents a filter medium. As shown in FIGS. 2 and 3, the filter medium 7 includes an inner layer having a thickness of approximately 1.5 mm, which is approximately 150 mm in length and approximately 0.001 prepared by tightly assembling polyamide monofilaments. A 2 mm diameter tightly assembled polyamide fiber 8 (registered trademark TECHNORA, TEITIN LIMITED) is prepared, and it is felt as a > layer to form an inner layer having an overall thickness of approximately one of 1.5 μm γπ *, and An outer layer having a thickness of about 0.5 mm, which is prepared by disposing a polypropylene monofilament 9 having a diameter of about 0.3 mm on the inner layer, and a stainless steel rod having a length of about 470 m ill. To hold the center of a single filament layer, and a sleeve clamp 1 1 to fix these layers on the rod 10, the overall thickness of the filter medium 7 is about 2.5 mm. The thicker monofilament of the outer layer is used to hold the inner layer of the thinner monofilament as a basic filtration medium and does not directly contribute to filtration. Accordingly, the outer layer is not an essential element of the filtering device of the present invention. The dimensions of the filter medium 7 are approximately 450 mm in length, approximately 70 mm in width, and approximately 2.5 mm in thickness. Nine filter media 7 are assembled on a wire mesh screen 4 that extends around a cylindrical basket-like frame 1, so that the individual free end portions of these media 7 overlap each other on the adjacent end portion of the sleeve clamp, as shown in figure 1. The overlap width shown by '' a 中 shown in FIG. 1 is about 200 mm. Each of the stainless steel rods 10 is fitted into the top of the frame 1 and the periphery of the bottom cover 2. In this case, 'mother ~ * the sprinkle medium 7 can be rotated around a stainless steel rod 10 as a rotating shaft. The filter medium 7 can be fixed to the frame 1. Therefore, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) " — -10- (Please read the precautions on the back before filling this page). -

1T printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 527204 printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Invention Description (8) The overall media is not rotatable, but only the single filament is free and can floating. The filtering device of the present invention with the aforementioned structure is almost in an airtight condition (except the fitting 6) via the filtering medium 7 and the top and bottom covers 2 and 3, and when the extension tube 5 is connected to the fitting 6, it is completely seal. The filtering method using the aforementioned device will be described below. After the extension tube 5 is fitted to the fitting 6, the filtering device is immersed in water having a mixed 3 0,000 P P m —a mountain suspension. The extension tube 5 is connected to a small size 8 liter / minute energy suction pump for filtering under vacuum. The suspension system is filtered at a filtration rate of 2.0 to 3.0 liters / minute, and a considerable amount of purified water is produced. The first filtration step was stopped after ten minutes of filtration, and rewashing was performed for one minute by flowing water in a backward direction toward the flow of the filtered liquid. This combination of ten minutes of filtration followed by one minute of rewashing is repeated continuously. As a result, filtered water can be obtained at a filtration rate of 110 to 160 liters / hour or about 3 200 liters / day. When the backwash water A (faucet water) passes through the filtering device violently from the inside to the outside, as shown in FIG. 4, the single filaments of the filtering medium 7 are released outward from the wire screen 4 and float in the water The rewash water is then trapped in an irregular gap between each single filament to remove the filtered solids accumulated thereon and completely regenerate the filtering medium 7. FIG. 5 shows another embodiment of the present invention. Each filter medium 7 is flatly arranged and fixed to a side portion of a chamber. According to this embodiment, the Chinese National Standard (CNS) A4 specification (210X297 mm) is applied in a manner similar to that described above through a paper size fixed to the chamber --------- 1 .--- Order ------ i-line I (Please read the notes on the back before filling this page) -11-527204 A7 B7 V. Description of the invention (9) Accessories (not shown in the figure), according to Sequentially supply filtered water and backwash water for effective suction filtration and backwash. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ---------- Shi K _? __ 3___ 丁 ______L Quan_? (Please read the precautions on the back before filling this page) This paper size applies China National Standard (CNS) A4 specification (210X 297 mm) -12-

Claims (1)

527204 A8 i Λ, B8; C8 i D8 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. Application for patent scope 1 1. A solid-liquid filtration method in which the filtered liquid system passes through a single fiber. Silk Thick multi-mesh to filter out and capture solids in the direction of the monofilament holding through the supply liquid, the multi-mesh includes tightly parallel monofilaments of a predetermined length, one end portion of which is fixed, and the other The end portion is floatable 'only when each single filament is forced to rotate in a regular direction' by a stent to maintain the multiple nets in a flat position at a suitable position. 2 _ The solid-liquid filtration method according to item 1 of the patent application, wherein, by supplying washing water in a backward direction toward the flow of the liquid to be filtered, the single fiber can be intermittently washed during a filtering process. Wire assembly is one of multiple meshes. 3. The solid-liquid filtration method according to item 1 of the scope of patent application, wherein the diameter of the single filament is 0.3 mm or less. 4. The solid-liquid filtration method according to item 1 of the patent application scope, wherein the single filament is made of plastic. 5. The solid-liquid filtration method according to item 1 of the patent application scope, wherein the monofilament is made of carbon fiber. 6. The solid-liquid filtration method according to item 1 of the scope of patent application, wherein the single filaments are metal single filaments. 7 · A solid-liquid filtering device, wherein ', includes a thick assembled monofilament multi-mesh prepared from single filaments of a predetermined length closely arranged in parallel for fixing an end portion of the multi-mesh A mechanism, and a network support, when the multiple network is forced to rotate in a regular direction, to maintain the multiple network in a flat position at a suitable position, one of the single filaments (please read first Note on the back page, please fill in this page again)-Install IT m JY-、 1T line paper size is applicable to Chinese National Standard (CNS) A4 specification (210 × 297 mm) -13- 527204 A8 B8 C8 D8 One part is fixed and the other end part is floatable. 8. The solid-liquid filtration device according to item 7 of the scope of patent application, wherein the diameter of the single filament is 0.3 mm or less. 9. The solid-liquid filtration device according to item 7 of the patent application scope, wherein the single filament is made of plastic. 10. The solid-liquid filter device according to item 7 of the patent application, wherein the single fiber is made of carbon fiber. 1 1. The solid-liquid filtration device according to item 7 of the application, wherein the monofilaments are metal monofilaments. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm)