CN202164182U - Sewage purification device - Google Patents

Abstract

The utility model relates to a sewage purification device, sewage purification device includes: a filter device, which is formed by connecting an ultrafiltration membrane filter with a raw water storage tank, a clear water storage tank, a raw water pump, a backwashing pump, a centrifugal water supply pump, a plurality of switch valves, a plurality of pipelines and the like; a centrifugal device which is a horizontal centrifugal device or a disc type centrifugal device. The utility model provides a sewage purification device, it connects in a proper flow of filter equipment according to sewage solid content, separates out in with sewage with centrifugal force effect through centrifugal device, by the solid particle of separation, can accord with the mud abandonment flow and directly abandon in with sewage, and the liquid river system of being separated out is by the raw water storage tank of leading-in filter equipment again, carries out repeated filtration operation.

Description

Sewage purification device

technical field

The utility model relates to a sewage purification device, in particular to a sewage purification device composed of an ultrafiltration membrane filter as the main filter material for cutting or grinding sewage produced in the semiconductor industry.

Background technique

In the semiconductor electronics industry, when cutting or grinding wafers, it needs to be cleaned with pure water. The pure water after cleaning contains a large number of solid particles.

In order to achieve the purpose of water purification and reuse, the current treatment methods and application processes in the industry often use ultrafiltration membrane filters (UF) as the main water purification recovery system to filter solid impurities in water to achieve the effect of solid and liquid separation. The purified water after dialysis is imported into the appropriate recovery point of the purified water recovery system according to the water quality, so as to achieve the purpose of recycling.

The above-mentioned known water purification system only uses the ultrafiltration membrane filter as the main filter for sewage dialysis, which will be limited by the removal effect and service life of the ultrafiltration membrane filter. Some concentrated water with solids must be directly discharged to Avoid the unrestricted increase of solid impurities in the water purification system, causing serious blockage of the filter membrane inside the ultrafiltration membrane filter and preventing normal dialysis and filtration of water.

Taking a comprehensive look at the benefits of the known water purification recovery system, although the purpose of partial recovery and reuse of purified water can be achieved, the following problems still arise from the concentrated discharge of sewage:

1. The sewage after concentration and discharge needs to be treated by coagulation and sedimentation. From the perspective of sewage treatment, although the amount of treated water is reduced, the solid concentration in the treated water is increased, and an equal amount of coagulant must still be added. It can only be deposited and discharged, which ultimately does not help to reduce the load of sewage treatment.

2. For the water purification recovery system mainly based on ultrafiltration membrane filters, the concentrated discharge water accounts for about 10-25% of the total water volume of the water purification recovery system. The 10-25% of the water volume must be discharged in the form of sewage treatment. Cannot be reused.

Utility model content

In view of this, the purpose of the utility model is to provide a sewage purification device.

In order to achieve the above purpose, the utility model provides a sewage purification device, which comprises:

a filter device and a centrifuge device;

The filtering device includes:

A raw water storage tank, one end of which is connected to the sewage receiving end, and the other end is connected to a raw water pump with a pipeline, and the raw water pump is connected to the water inlet pipeline of the ultrafiltration membrane filter;

An ultrafiltration membrane filter, one end of which is connected to a water inlet pipeline, the other end is connected to a water purification pipeline, and a first pipeline and a second pipeline connected to each other; one end of the water inlet pipeline is connected to the first pipe The clean water pipeline is connected to a clean water storage tank, one end of the first pipeline is connected to the raw water storage tank, and the other ends of the first pipeline and the second pipeline are connected to a concentrated water storage tank;

A clear water storage tank, one end of which is connected to a backwash pump, and the backwash pump is connected to the water purification pipeline of the ultrafiltration membrane filter with a pipeline;

A concentrated water storage tank, one end of which is connected with a centrifugal water supply pump;

The water inlet end of the centrifugal device is connected to a centrifugal water supply pump.

As a preferred solution of the above sewage purification device, the centrifugal device is a horizontal centrifugal device or a disc centrifugal device.

As a preferred solution of the above-mentioned sewage purification device, the pipeline connecting the raw water pump and the ultrafiltration membrane filter is provided with a No. 1 on-off valve; the pipeline at one end of the ultrafiltration membrane filter is also provided with a No. 8 on-off valve; The clean water pipeline between the membrane filter and the clean water storage tank is equipped with a No. 2 on-off valve; the end of the first pipeline connected to the raw water storage tank is equipped with a first drain valve and a No. 4 on-off valve, and the first pipeline is connected to the concentrated water storage tank. One end of the connection is equipped with a No. 7 switch valve; the second pipeline is equipped with a No. 3 switch valve and a second drain valve; the clean water pipeline connecting the backwash pump and the clean water storage tank is equipped with a No. There are No. 6 on-off valves.

As a preferred solution of the above-mentioned sewage purification device, the filter device is also provided with a bag filter on the connecting pipeline between the raw water pump and the ultrafiltration membrane filter.

In addition, the utility model also provides another sewage purification device, which includes:

a filter device and a centrifuge device;

The filtering device includes:

A raw water storage tank, one end of which is connected to the sewage receiving end, and the other end is respectively connected to a raw water pump and a centrifugal water supply pump through two independent pipelines;

A raw water pump, the matching pipeline is connected with the water inlet end of the ultrafiltration membrane filter;

An ultrafiltration membrane filter, which is provided with a clean water outlet port and connected to a clean water storage tank with a pipeline, and the ultrafiltration membrane filter is also provided with a sewage outlet and connected to the raw water storage tank with a pipeline;

A clean water storage tank, which is connected with a backwash pump, and the backwash pump is connected to the clean water outlet end of the ultrafiltration membrane filter with a pipeline;

The water inlet end of the centrifugal device is connected to a centrifugal water supply pump.

As a preferred solution of the above another sewage purification device, the centrifugal device is a horizontal centrifugal device or a disc centrifugal device.

In addition, the utility model also provides yet another sewage purification device, which includes:

a filter device and a centrifuge device;

The filtering device includes:

A raw water storage tank, one end of which is connected to the sewage receiving end, and the other end is connected with a plurality of pipelines in sequence to the centrifugal water supply pump, the centrifugal water storage tank, the filter membrane water supply pump and the ultrafiltration membrane filter; the ultrafiltration membrane filter is set There is a clean water outlet port, and it is connected to the clean water storage tank by a pipeline; the clean water storage tank is connected to a backwash pump, and the backwash pump is connected to the clean water outlet end of the ultrafiltration membrane filter with a pipeline; the ultrafiltration membrane filter There is a sewage outlet, and it is connected to the raw water storage tank with a pipeline;

The centrifugal device is arranged in the connecting pipeline between the centrifugal water supply pump and the centrifugal water storage tank.

As another preferred solution of the sewage purification device above, the centrifugal device is a horizontal centrifugal device or a disc centrifugal device.

The sewage purification device provided by the utility model has the ability to separate the solid particles in the sewage from the sewage in the way of centrifugal force, and the separated solid particles can be directly discarded according to the sludge waste process, and then separated. Liquid water can be re-circulated and re-filtered to achieve the function of quickly reducing the content of solid particles in the sewage; in addition, the utility model is equipped with a bag filter on the connecting pipeline between the raw water pump and the ultrafiltration membrane filter. Preliminary filtration of fine particles and suspended solids in the ultrafiltration membrane filter to reduce the filtration burden on the ultrafiltration membrane filter, and has the function of substantially increasing its service life.

Description of drawings

Fig. 1 is the schematic diagram of preferred embodiment one of the utility model sewage purification device;

Fig. 2 is the schematic diagram of preferred embodiment 2 of the sewage purification device of the present invention;

Fig. 3 is a schematic diagram of a third preferred embodiment of the sewage purification device of the present invention.

[Description of main component symbols]

Raw water storage tank-10; filtering device-100; No. 1 switch valve-101; No. 2 switch valve-102; No. 3 switch valve-103; No. 4 switch valve-104; -106; On-off valve No.7-107; On-off valve No.8-108; Pipeline-109; Sewage receiving end-11; First drain valve-110; Second drain valve-120; Air compressor-130; Bag filter -140;

Raw water pump-20; centrifugal device-200;

Ultrafiltration membrane filter-30; water inlet pipeline-31; water purification pipeline-32; first pipeline-33; second pipeline-34;

Clean water storage tank-40; point-of-use water supply pump-41;

Backwash pump-50;

Concentrated water storage tank - 60;

Centrifugal water supply pump-70;

Centrifugal water storage tank-80;

Membrane water supply pump-90.

Detailed ways

The utility model will be further described below through preferred embodiments and accompanying drawings, so that those skilled in the art can implement the utility model according to the description of this specification.

First of all, please refer to Figure 1, which is a schematic diagram of a preferred embodiment of a sewage purification device of the present invention, which includes: a filtering device 100 and a centrifugal device 200; wherein,

Filtration device 100 includes: raw water storage tank 10, raw water pump 20, ultrafiltration membrane filter 30, clear water storage tank 40, backwash pump 50, concentrated water storage tank 60, centrifugal water supply pump 70, No. 1 on-off valve 101, No. 2 On-off valve 102, No. three on-off valve 103, No. four on-off valve 104, No. five on-off valve 105, No. six on-off valve 106, No. seven on-off valve 107, No. eight on-off valve 108 and multiple pipelines 109 are connected; ,

Raw water storage tank 10, one end is connected to the sewage receiving end 11 for cutting or grinding and washing, one end is connected to the water inlet of raw water pump 20, and the water outlet of raw water pump 20 is connected to the water inlet pipeline of ultrafiltration membrane filter 30 with pipeline 109 31, and the pipeline 109 of the raw water pump 20 and the ultrafiltration membrane filter 30 is provided with a No. 1 switch valve 101;

Ultrafiltration membrane filter 30, one end is connected with a water inlet pipeline 31, and this end is connected with No. 8 on-off valve 108 and an air compressor 130 with pipeline 109 in addition, and ultrafiltration membrane filter 30 other end is connected with a clean water pipeline 32, And provide the first pipeline 33 and the second pipeline 34 that discharge sewage and communicate with each other; wherein, one end of the water inlet pipeline 31 is connected to the first pipeline 33, and the water inlet pipeline 31 is provided with a No. 6 on-off valve 106 The clean water pipeline 32 is connected with the clean water storage tank 40, and is provided with a No. 2 switch valve 102; one end of the first pipeline 33 is connected with the raw water storage tank 10, and a No. 4 switch valve is provided before entering the raw water storage tank 10 104, and the first drain valve 110 that can manually adjust the water flow, and the other ends of the first pipeline 33 and the second pipeline 34 are connected to the concentrated water storage tank 60, and the first pipeline 33 enters the concentrated water storage tank 60 A No. 7 switch valve 107 is provided before, and a No. 3 switch valve 103 and a second drain valve 120 are provided before the second pipeline 34 enters the concentrated water storage tank 60;

One end of the clear water storage tank 40 is connected to the backwash pump 50, and the backwash pump 50 is connected to the pipeline 109 and the clean water pipeline 32. The pipeline 109 is provided with a No. 5 on-off valve 105. The clean water storage tank 40 is also connected with a point-of-use water supply pump 41, which can transport the clean water stored in the clean water storage tank 40 to be used as cleaning water for wafer cutting or grinding, that is, to the point of use;

The concentrated water storage tank 60 receives the sewage discharged from the ultrafiltration membrane filter 30, and one end thereof is connected to a centrifugal water supply pump 70;

The centrifugal device 200 is a horizontal centrifugal device or a disk-type centrifugal device, and its water inlet is connected to the centrifugal water supply pump 70. The centrifugal device 200 is also provided with a solid discharge port, which can discharge the separated solid particles and a liquid discharge port. The liquid discharge port is connected to the raw water storage tank 10 with the pipeline 109;

Through the above components, when the sewage purification device is in operation, the sewage can be dialyzed through the ultrafiltration membrane filter 30 to obtain purified water for recycling and reuse, and the concentrated water discharged through the ultrafiltration membrane filter 30 can be separated by centrifugal force by the centrifugal device 200 The solid particles and liquid water can be directly discarded or recycled according to the sludge waste process, while the liquid water is re-introduced into the raw water storage tank 10 for repeated filtration.

The following is a further detailed description of the sewage purification device of the present utility model in the operation procedure of sewage purification:

When the sewage collected by the raw water storage tank 10 has accumulated to a predetermined water level, No. 1 switch valve 101, No. 2 switch valve 102, No. 3 switch valve 103, and No. 4 switch valve 104 are opened, while No. 5 switch valve 105 and No. 6 switch valve are opened. 106. No. 7 on-off valve 107 and No. 8 on-off valve 108 are closed; at the same time, the raw water pump 20 is started, and the sewage in the raw water storage tank 10 passes through the No. 1 on-off valve 101, and then enters the outlet pipeline 31 and enters the ultrafiltration membrane Dialysis is carried out inside the filter 30, and the dialysis clean water is input into the clean water storage tank 40 through the No. 2 on-off valve 102 through the clean water pipeline 32, so as to be used as cleaning water for the processing process; while the ultrafiltration membrane filter 30 is in the process of dialysis sewage, In order to avoid the unrestricted rise of the particles inside, part of the concentrated sewage must be directly discharged into the concentrated water storage tank 60 from the second pipeline 34 through the No. 3 on-off valve 103 and the second drain valve 120. 10-25% of the total water volume inside the filter 30 , the flow control of the drainage volume is manually set by the second drain valve 120 . The concentrated sewage or backwash water discharged after being dialyzed by the ultrafiltration membrane filter 30 is concentrated in the concentrated water storage tank 60, and then transported into the centrifugal device 200 through the centrifugal water supply pump 70 to directly extract the solid particles from the sewage in a centrifugal manner. separated, and then discharged in the form of solid slag discharge, and the separated liquid water is introduced into the raw water storage tank 10 through the pipeline 109, and undergoes repeated circulation and filtration treatment.

When a large number of high-concentration particles are accumulated in the membrane body of the ultrafiltration membrane filter 30, it must be cleaned and discharged to improve its water generation function. In this embodiment, when running backwashing, it is equipped with air washing operations, and its execution method is: Washing, backwashing, air washing, backwashing, flushing, the detailed procedures are as follows:

1. Air wash one

Open the No. 7 switch valve 107 and the No. 8 switch valve 108, and the No. 1 switch valve 101, the No. 2 switch valve 102, the No. 3 switch valve 103, the No. 4 switch valve 104, the No. 5 switch valve 105, and the No. 6 switch valve 106 In the closed state, the dry compressed air generated by the air compressor 130 (CDA) enters the interior of the ultrafiltration membrane filter 30 through the No. Road 33 is discharged into concentrated water storage tank 60 through No. 7 on-off valve 107.

2. Backwashing

No. 5 on-off valve 105 and No. 6 on-off valve 106 are opened, and all the other on-off valves are closed, and the backwash pump 50 is started, and the clean water from the clear water storage tank 40 passes through the ultrafiltration membrane filter 30 from No. five on-off valve 105. The clean water pipeline 32 is introduced into it, and the high-concentration sewage can be directly discharged into the concentrated water storage tank 60 from the water inlet pipeline 31 through the No. 6 on-off valve 106 and connected to the first pipeline 33 for collection. After the predetermined water level is reached, the centrifuge device 200 is started to perform solid-liquid separation.

3. Air wash two

Air washing again, open No. 7 switch valve 107, No. 8 switch valve 108, produce dry compressed air with air compressor 130 (CDA) and enter the inside of ultrafiltration membrane filter 30 by No. 8 switch valve 108, so that the internal membrane body is formed Disturbance to loosen the particles attached to the surface of the ultrafiltration membrane, and then discharge through the No. 7 on-off valve 107.

4. Upper backwash

Open the No. 5 on-off valve 105 and the No. 7 on-off valve 107, and start the backwash pump 50, and import the clean water from the clean water storage tank 40 from the No. 5 on-off valve 105 through the clean water pipeline 32 of the ultrafiltration membrane filter 30 into its interior , the high-concentration wastewater is discharged from the first pipeline 33 through the No. 7 on-off valve 107 into the concentrated water storage tank 60 for collection, and then the centrifuge 200 is used for solid-liquid separation.

5. Rinse

Open the No. 1 on-off valve 101 and No. 4 on-off valve 104, and start the raw water pump 20, flush the inside of the ultrafiltration membrane filter 30 with sewage (raw water), and take away the residual particles attached to the surface of the membrane body again.

For the cleaning operation inside the ultrafiltration membrane filter 30, the air washing operation or the upper and lower backwashing operation procedures may be omitted as required.

Furthermore, the filter device 100 of the present utility model is provided with a bag filter 140 in the connecting pipeline 109 between the raw water pump 20 and the ultrafiltration membrane filter 30, which can preliminarily filter the fine particles and suspended matter in the sewage to reduce the impact of ultrafiltration. The filtration burden of the membrane filter 30 has the function of substantially increasing its service life.

As shown in Figure 2, it is the second preferred embodiment of the sewage purification device of the present invention, which includes: a filter device 100 and a centrifugal device 200; wherein,

Filtration device 100 includes: raw water storage tank 10, raw water pump 20, ultrafiltration membrane filter 30, clean water storage tank 40, reverse water pump 50, centrifugal water supply pump 70 and multiple pipelines 109; wherein,

The raw water storage tank 10 has one end connected to the sewage receiving end 11 for cutting or grinding and washing, and the other end is connected to a raw water pump 20 and a centrifugal water supply pump 70 with two independent pipelines 109;

The raw water pump 20 is connected with the water inlet end of the ultrafiltration membrane filter 30 in conjunction with the pipeline 109;

The ultrafiltration membrane filter 30 is provided with a clean water outlet port and is connected to a clean water storage tank 40 with a pipeline 109, and it is also provided with a sewage outlet and connected to the raw water storage tank 10 with a pipeline;

The clear water storage tank 40 can store the clean water from the dialysis of the ultrafiltration membrane filter 30, which is connected with a backwash pump 50, and the backwash pump 50 is connected to the clean water outlet port of the ultrafiltration membrane filter 30 in cooperation with the pipeline 109, so that the The clean water in the clean water storage tank 40 is introduced into the ultrafiltration membrane filter 30 for backwashing;

The centrifugal device 200 is a horizontal centrifugal device or a disk type centrifugal device, and its water inlet end is connected to the centrifugal water supply pump 70 to receive the high-concentration sewage sent by the centrifugal water supply pump 70, and it uses the centrifugal method to directly remove the solid particles from The separation operation is carried out in the high-concentration sewage, and the separated solids are discharged by slag discharge, and the separated liquid water is introduced into the raw water storage tank 10 through the pipeline 109 for repeated circulation and filtration.

The above preferred embodiment 2 of the utility model, raw water pump 20 is connected to the pipeline of ultrafiltration membrane filter 30, ultrafiltration membrane filter 30 is connected to the pipeline of clear water storage tank 40, and ultrafiltration membrane filter 30 is connected to the pipeline of raw water storage tank 10 1. The pipeline connecting the backwash pump 50 to the ultrafiltration membrane filter 30 is equipped with a necessary on-off valve. When the sewage purification device is performing the operation procedure of sewage purification, it can perform the on-off operation in a timely manner; The pipeline connecting the filter 30 to the clean water storage tank 40 and the pipeline connecting the ultrafiltration membrane filter 30 to the raw water storage tank 10 are respectively provided with drain valves that can adjust the water flow.

As shown in Figure 3, it is a preferred embodiment three of the sewage purification device of the present invention, which includes: a filter device 100 and a centrifugal device 200; wherein,

Filtration device 100, which includes: raw water storage tank 10, centrifugal water supply pump 70, centrifugal water storage tank 80, filter membrane water supply pump 90, ultrafiltration membrane filter 30, clean water storage tank 40 and multiple pipelines 109; wherein,

The raw water storage tank 10 has a sewage receiving end 11 connected to cutting or grinding and washing at one end, and the other end is connected with a plurality of pipelines 109 to the centrifugal water supply pump 70, the centrifugal water storage tank 80, the filter membrane water supply pump 90 and the ultrafiltration Membrane filter 30; the ultrafiltration membrane filter 30 is provided with a clean water outlet port, and is connected to the clean water storage tank 40 with a pipeline 109, and the clean water stored in the clean water storage tank 40 can be used as a cutting or grinding process in the solar photovoltaic industry The cleaning water required in the water; the clean water storage tank 40 is connected with a backwash pump 50, and the reverse water pump 50 is connected to the clean water outlet end of the ultrafiltration membrane filter 30 in cooperation with the pipeline 109, so that the clean water is imported into the ultrafiltration membrane filter 30 for further cleaning. Back flushing: the ultrafiltration membrane filter 30 is provided with a sewage outlet, and is connected to the raw water storage tank 10 with a pipeline 109, so as to repeat the aforementioned circulation filtration operation;

The centrifugal device 200 is a horizontal centrifugal device or a disc type centrifugal device, which is installed on the connecting pipeline between the centrifugal water supply pump 70 and the centrifugal water storage tank 80, and can receive the sewage transported by the centrifugal water supply pump 70, and pass through the centrifugal device 200 The sewage can be directly separated from solid and liquid by centrifugal force, and the separated solid can be discharged by slag discharge, and the separated liquid water can be introduced into the centrifugal water storage tank 80 for subsequent dialysis and purification treatment of the ultrafiltration membrane filter 30 .

The above-mentioned preferred embodiment three of the present utility model, connect the pipeline of the ultrafiltration membrane filter 30 at the centrifugal water storage tank 80, the pipeline of the ultrafiltration membrane filter 30 connecting the clean water storage tank 40, and the connection of the ultrafiltration membrane filter 30 to the raw water storage tank 10 The pipeline and the pipeline connecting the backwash pump 50 to the ultrafiltration membrane filter 30 are equipped with necessary on-off valves. When the sewage purification device is performing the operation procedure of sewage purification, the on-off operation can be performed correspondingly in a timely manner; The pipeline connecting the membrane filter 30 to the clean water storage tank 40 and the pipeline connecting the ultrafiltration membrane filter 30 to the raw water storage tank 10 are respectively provided with drain valves that can adjust the water flow.

To sum up, the filter device 100 shown in the preferred embodiment 1 to 3 of the sewage purification device of the present invention, although its structural coordination is different, it does not deviate from the principle of using an ultrafiltration membrane filter as the main filter material. Basic equipment, according to which, if the filter device is composed of ultrafiltration membrane filter as the main filter material and generally known necessary basic components, if it does not deviate from the equivalent change or modification made within the patent scope of the utility model , are all included within the scope of the utility model patent.

Claims (8)

1. A sewage purification apparatus, characterized in that the sewage purification apparatus comprises:

a filtering device and a centrifugal device;

the filtering device includes:

one end of the raw water storage tank is connected with the sewage receiving end, and the other end of the raw water storage tank is connected with a raw water pump in a matched pipeline manner, and the raw water pump is connected with a water inlet pipeline of the ultrafiltration membrane filter;

the ultrafiltration membrane filter is connected with a water inlet pipeline at one end and a water purification pipeline at the other end, and a first pipeline and a second pipeline which are communicated with each other; one end of the water inlet pipeline is connected with the first pipeline, the purified water pipeline is connected with a clean water storage tank, one end of the first pipeline is connected with the raw water storage tank, and the other ends of the first pipeline and the second pipeline are connected with a concentrated water storage tank;

one end of the clean water storage tank is connected with a backwashing pump, and the backwashing pump is matched with a pipeline and is connected with a clean water pipeline of the ultrafiltration membrane filter;

a concentrated water storage tank, one end of which is connected with a centrifugal water supply pump;

the water inlet end of the centrifugal device is connected with the centrifugal water supply pump.

2. The wastewater purification apparatus of claim 1, wherein the centrifugal device is a horizontal centrifugal device or a disk-type centrifugal device.

3. The sewage purification device according to claim 1, wherein the pipeline connecting the raw water pump and the ultrafiltration membrane filter is provided with a first switch valve; an eight-size switch valve is additionally arranged on a pipeline at one end of the ultrafiltration membrane filter; a clear water pipeline connecting the ultrafiltration membrane filter and the clear water storage tank is provided with a second switch valve; a first drain valve and a fourth switch valve are arranged at one end of the first pipeline connected with the raw water storage tank, and a seventh switch valve is arranged at one end of the first pipeline connected with the concentrated water storage tank; the second pipeline is provided with a third switch valve and a second drain valve; a water purifying pipeline connecting the backwashing pump and the clear water storage tank is provided with a fifth switch valve; the water inlet pipeline is provided with a six-way switch valve.

4. The apparatus for purifying wastewater as claimed in claim 1, wherein the filtering means further comprises a bag filter on a connection pipe between the raw water pump and the ultrafiltration membrane filter.

5. A sewage purification apparatus, characterized in that the sewage purification apparatus comprises:

a filtering device and a centrifugal device;

the filtering device includes:

one end of the raw water storage tank is connected with the sewage receiving end, and the other end of the raw water storage tank is respectively connected with a raw water pump and a centrifugal water supply pump through two independent pipelines;

a raw water pump, the matching pipeline of which is connected with the water inlet end of the ultrafiltration membrane filter;

the ultrafiltration membrane filter is provided with a clean water outlet end and is connected with a clean water storage tank by a pipeline, and the ultrafiltration membrane filter is also provided with a sewage outlet and is connected with the raw water storage tank by a pipeline;

the clean water storage tank is connected with a backwashing pump, and the backwashing pump is connected to the clean water outlet end of the ultrafiltration membrane filter in a matched pipeline manner;

the water inlet end of the centrifugal device is connected with the centrifugal water supply pump.

6. The wastewater purification apparatus of claim 5, wherein the centrifugal device is a horizontal centrifugal device or a disk-type centrifugal device.

7. A sewage purification apparatus, characterized in that the sewage purification apparatus comprises:

a filtering device and a centrifugal device;

the filtering device includes:

one end of the raw water storage tank is connected with the sewage receiving end, and the other end of the raw water storage tank is matched with a plurality of pipelines to be sequentially connected with the centrifugal water supply pump, the centrifugal water storage tank, the filter membrane water supply pump and the ultrafiltration membrane filter; the ultrafiltration membrane filter is provided with a purified water outlet end and is connected with a purified water storage tank through a pipeline; the clean water storage tank is connected with a backwashing pump, and the backwashing pump is connected with a clean water outlet end of the ultrafiltration membrane filter in a matched pipeline manner; the ultrafiltration membrane filter is provided with a sewage outlet and is connected to the raw water storage tank in a matching way;

the centrifugal device is arranged on a connecting pipeline of the centrifugal water supply pump and the centrifugal water storage tank.

8. The wastewater purification apparatus of claim 7, wherein the centrifugal device is a horizontal centrifugal device or a disk-type centrifugal device.

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