CN220564320U - Immersed ultrafiltration filtration equipment - Google Patents

Abstract

The application relates to immersed ultrafiltration filter equipment, which comprises a tank body which is closed, wherein a mud storage area, a sedimentation area and a membrane filtration area are sequentially arranged in the tank body from bottom to top, the tank body is also provided with a water inlet, and the water inlet is positioned below the sedimentation area; a mud bucket is arranged at the bottom of the mud storage area; the sedimentation zone is provided with a layer of inclined tube along the section thereof; the membrane filtration area is provided with a plurality of membrane columns, the water producing end of each membrane column is respectively communicated with a water producing pipe, and the water producing pipe is provided with a water producing valve. The integral structure can be simplified, the cost can be reduced, and the water production efficiency and the water yield can be improved.

Description

Immersed ultrafiltration filtration equipment

Technical Field

The application relates to the technical field of water treatment, in particular to an immersed ultrafiltration filter device.

Background

At present, the ultrafiltration membrane filtration process is widely applied in the field of water treatment, and the immersed ultrafiltration membrane process is focused on as the immersed ultrafiltration membrane process has better adaptability to the existing process transformation. The immersion type ultrafiltration membrane component mainly comprises a curtain type and a columnar type, and the application mode is that the membrane component is directly arranged in a membrane pool, and filtration is formed through the suction effect of a pump. The bottom of the membrane tank is flat bottom, mud is discharged through a blow-down valve arranged at the bottom, or a perforated pipe is arranged at the bottom, and the mud is pumped and discharged through a mud pump. The structure is more complex and the cost is higher.

In practical application, the membrane component is directly soaked in raw water to be treated, the concentration of particle pollutants in the membrane pool is higher and higher along with the suction of a water production pump, the blocking of the membrane holes is aggravated, the membrane flux is reduced, the water yield is reduced, and the membrane flux needs to be recovered by measures such as back flushing or air washing. This reduces the water production efficiency and water yield of the membrane module.

How to provide an immersed ultrafiltration filter device, which can simplify the whole structure, reduce the cost, and improve the water production efficiency and the water yield at the same time, is a technical problem to be solved by the technicians in the field.

Disclosure of Invention

The utility model provides an immersed ultrafiltration filtration equipment can simplify overall structure, reduce cost, can also improve water yield efficiency and water yield simultaneously.

In order to solve the technical problems, the application provides immersion ultrafiltration filter equipment, which comprises a tank body in closed arrangement, wherein a mud storage area, a sedimentation area and a membrane filtration area are sequentially arranged in the tank body from bottom to top, the tank body is also provided with a water inlet, and the water inlet is positioned below the sedimentation area; a mud bucket is arranged at the bottom of the mud storage area; the sedimentation zone is provided with a layer of inclined tube along the section of the sedimentation zone; the membrane filtration area is provided with a plurality of membrane columns, the water producing end of each membrane column is respectively communicated with a water producing pipe, and the water producing pipe is provided with a water producing valve.

The immersed ultrafiltration filter equipment is not provided with a water production suction pump at the water production pipe, but is used for filtering raw water through a membrane column and finally discharging the raw water through the pressure action in the tank body, and is also not provided with a sludge discharge pump, so that sludge precipitated into a sludge bucket is discharged from the bottom through the pressure action of the tank body, thereby simplifying the overall structure, reducing the overall volume and lowering the cost.

The small and medium particles settled on the surface of the inclined tube can form mud cakes on the surface of the inclined tube, and as the inclined tube has a certain inclination angle, the mud cakes can slide down along the inclined tube under the action of gravity and fall into the mud storage area. The inclined tube is arranged, so that the precipitation of suspended pollutants can be accelerated, the concentration of the suspended matters in the tank body is obviously distributed from top to bottom, and therefore, the water quality of the water flowing into the membrane filtration area can be effectively improved, the membrane flux of the membrane column can be improved, the cleaning times can be reduced, the water yield and the water production efficiency can be improved, the effects of saving energy and reducing consumption can be achieved, the service environment of the membrane column can be improved, the service life of the membrane column can be prolonged, and the cost can be reduced.

In addition, the sludge concentration in the tank body is sequentially reduced from bottom to top, the sludge concentration in the membrane filtration area is lower, so that the membrane column aeration cleaning times and backwashing times can be reduced, the time for sedimentation of lower sludge is prolonged, the sedimentation effect of the inclined tube is added, the lower sludge concentration is directly improved, the water mixed in the discharged sludge is less, the total discharge amount of the sludge is reduced, the sludge concentration unit is saved, and the whole structure is simplified and the cost is reduced while the better sludge discharge effect is realized.

The membrane filtration area, sedimentation area and storage mud district are arranged in same jar body from top to bottom in proper order along the direction of height, and water is produced at the top, and bottom row mud, mud utilize gravity sedimentation effect for bottom mud concentration is more and more concentrated, under the effect of jar internal pressure, the clear water upwards goes away and discharges from the top, and the mud that deposits to the bottom can be discharged from the bottom, compares in the scheme that sets up membrane filtration area, sedimentation area and storage mud respectively in different jar bodies, and this submerged ultrafiltration filtration equipment make full use of gravity and pressure's effect realizes mud-water separation, can reduce the site space requirement when accomplishing the ultrafiltration operation of raw water.

Optionally, an automatic ventilation valve is further arranged at the top of the tank body, and a mud discharging valve is arranged at the bottom of the mud bucket.

Optionally, the top of the tank body is also provided with a connecting port, the top of the membrane column is also provided with a connecting piece, the connecting piece is detachably connected with the connecting port, and the connecting port can be plugged by a cover plate which is detachably connected.

Optionally, the connecting piece and the connecting port are connected through a quick-connection interface.

Optionally, the water producing ends of the membrane columns are respectively connected with branch pipes, and the branch pipes are respectively communicated with the water producing pipes.

Optionally, the membrane column water-producing device further comprises a backwashing part, wherein the backwashing part comprises a backwashing pipe, a backwashing valve and a backwashing pump, the backwashing valve and the backwashing pump are arranged on the backwashing pipe, and the backwashing pipe is communicated with the water-producing end of each membrane column.

Optionally, the water producing pipe comprises a first section and a second section, the first section is communicated with each branch pipe, the second section is provided with a water producing valve, and the backwash pipe is communicated with the first section.

Optionally, the air washing device further comprises an air washing part, wherein the air washing part comprises an aeration unit, an air pipe and an air washing valve; the aeration unit is communicated with an air source through the air pipe and is positioned between the sedimentation area and the membrane filtration area, an aeration port of the aeration unit is upward, and the air washing valve is arranged on the air pipe.

Optionally, the water distributor further comprises a water distributor, wherein the water distributor comprises a pipe part and a horn part positioned in the tank body, the pipe part penetrates through a mounting hole formed in the side wall of the tank body and is communicated between the water inlet pipe and the horn part, the bottom width of the horn part is larger than the top width, and the bottom opening of the horn part forms the water inlet.

Optionally, the pipe part is located above the sedimentation zone, and the horn part passes through the sedimentation zone along the height direction.

Drawings

Fig. 1 is a schematic structural diagram of an immersed ultrafiltration filter apparatus according to an embodiment of the present application.

In fig. 1, the reference numerals are as follows:

1-a tank body, 11-a mud storage area, 12-a sedimentation area, 13-a membrane filtration area, 14-a water inlet, 15-an automatic ventilation valve, 16-a connection port, 17-a mounting hole and 18-a bracket;

2-a mud bucket, 21-a mud valve and 22-a mud pipe;

3-inclined tube;

4-membrane column, 41-water producing end, 42-connecting piece;

5-water producing pipe, 51-first section, 52-second section, 53-water producing valve;

6-separating pipes;

7-backwashing parts, 71-backwashing pipes, 72-backwashing valves and 73-backwashing pumps;

8-an air washing part, 81-an aeration unit, 811-an aeration port, 82-an air pipe and 83-an air washing valve;

91-pipe part, 92-horn part;

101-water inlet pipe, 102-water inlet pump, 103-water inlet valve.

Detailed Description

In order to make the technical solution of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings and specific embodiments.

The embodiment of the application provides an immersed ultrafiltration filter device which is used for filtering raw water and generating clean water (namely 'produced water') and sludge. Specifically, as shown in fig. 1, the immersed ultrafiltration filtration device comprises a closed tank body 1, the inner cavity of the tank body 1 comprises a mud storage area 11, a sedimentation area 12 and a membrane filtration area 13 which are sequentially arranged from bottom to top, a mud bucket 2 is arranged at the bottom of the mud storage area 11, the mud bucket 2 is connected with a mud pipe 22, the mud pipe 22 is provided with a mud valve 21, the sedimentation area 12 is provided with a layer of inclined pipe 3, each inclined pipe 3 is arranged along the section of the sedimentation area 12, the membrane filtration area 13 is provided with a plurality of membrane columns 4, the side wall of each membrane column 4 is provided with a filtration hole, the water producing ends 41 of each membrane column 4 are respectively communicated with a water producing pipe 5, and the water producing pipe 5 is provided with a water producing valve 53.

The water inlet 14 is located below the sedimentation zone 12, and raw water is pumped into the tank body 1 through the water inlet 14 under the power of the water inlet pump 102, and the raw water pumped into the tank body 1 is located in the mud storage zone 11 as the water inlet 14 is arranged below the sedimentation zone 12, so that the raw water flows upwards through the sedimentation zone 12 to the membrane filtration zone 13 along with the increase of the raw water pumped into the tank body 1, and finally filtered by the membrane column 4 to form produced water, and the produced water is discharged from the water production pipe 5.

Specifically, after the raw water is introduced into the tank body 1, the raw water passes through three filtering stages, the first filtering stage is introduced into the mud storage area 11, the large-particle suspended pollutant mixed in the raw water drops to the bottom of the mud storage area 11 to the mud bucket 2 under the action of gravity, the small-particle pollutant in the raw water rises to the sedimentation area 12 along with water flow and enters the second filtering stage, due to the arrangement of the inclined tube 3 in the sedimentation area 12, the volume utilization coefficient of the sedimentation area 12 is increased, the small-particle suspended pollutant can be precipitated on the surface of the inclined tube 3, then the water flow continues to flow upwards to the membrane filtering area 13 and enters the third filtering stage, at the moment, the concentration of the suspended pollutant mixed in the water flow is small, due to the sealing of the tank body 1, and the pressure of the raw water in the membrane filtering area 13 is continuously increased after the tank body 1 is filled with water, the water in the membrane filtering area 13 can permeate through the filter holes on the side wall of the membrane column 4 under the action of the pressure to form produced water, and then the water cake is discharged from the produced water pipe 5, and the small-particle suspended pollutant is formed on the surface of the membrane column 4.

When the sludge is required to be discharged, the water producing valve 53 can be closed, the sludge discharging valve 21 is opened, raw water is continuously introduced into the tank body 1 through the water inlet 14, so that the pressure in the tank body 1 is increased, and the sludge deposited into the sludge hopper 2 is discharged through the pressure effect.

The immersed ultrafiltration filter equipment is not provided with a water production suction pump at the water production pipe 5, but the pressure action in the tank body 1 is used for filtering raw water through the membrane column 4 and finally discharging the raw water, and meanwhile, the pressure action of the tank body 1 is used for discharging sludge deposited in the sludge hopper 2 from the bottom, so that the integral structure can be simplified, the integral volume can be reduced, and the cost can be reduced.

The sedimentation area 12 is provided with a layer of inclined pipes along the section thereof, in particular, the sedimentation area 12 is provided with a layer of honeycomb structure along the section thereof, the honeycomb structure can be provided as a plastic plate comprising a plurality of wave-shaped structures, the plastic plates are obliquely arranged and form a whole through bonding, a row of inclined pipes can be formed between two adjacent plastic plates, and a plurality of rows of inclined pipes are sequentially arranged in parallel along the section of the sedimentation area 12.

The small and medium particles settled on the surface of the inclined tube 3 can form mud cakes on the surface of the inclined tube 3, and as the inclined tube 3 has a certain inclination angle, the mud cakes can slide down the inclined tube 3 under the action of gravity and fall into the mud storage area 11. The inclined tube 3 can accelerate the precipitation of suspended pollutants, so that the concentration of suspended matters in the tank body 1 is obviously distributed from top to bottom, and therefore, the water quality of the suspended matters entering the membrane filtration zone 13 can be effectively improved, the membrane flux of the membrane column 4 can be improved, the cleaning times can be reduced, the water yield and the water yield can be improved, the energy saving and consumption reduction effects can be achieved, the use environment of the membrane column 4 can be improved, the service life of the membrane column 4 can be prolonged, and the cost can be reduced.

In addition, the sludge concentration in the tank body 1 is sequentially reduced from bottom to top, the sludge concentration in the membrane filtration zone 13 is lower, so that the aeration cleaning times and backwashing times of the membrane column 4 can be reduced, the time for sedimentation of lower sludge is prolonged, the sedimentation effect of the inclined tube 3 is added, the lower sludge concentration is directly improved, the water mixed in discharged sludge is less, the total discharge amount of the sludge is reduced, a sludge concentration unit is saved, and the whole structure is simplified and the cost is reduced while the better sludge discharge effect is realized.

The membrane filtration zone 13, the sedimentation zone 12 and the mud storage zone 11 are sequentially arranged in the same tank body 1 from top to bottom along the height direction, water is produced at the top, mud is discharged from the bottom, the mud utilizes the gravity sedimentation effect, so that the concentration of the mud at the bottom is more and more concentrated, under the action of the internal pressure of the tank body 1, clean water is upwards discharged from the top, and the mud precipitated to the bottom can be discharged from the bottom.

As shown in fig. 1, an automatic ventilation valve 15 is arranged at the top of the tank body 1, and in the process of producing water, when raw water is introduced into the tank body 1 through the water inlet 14, the automatic ventilation valve 15 is in an open state, and timely discharges air reserved in the tank body 1, when the raw water fills the space in the tank body 1, the automatic ventilation valve 15 is closed, and then the pressure in the tank body 1 is increased along with the entering of the raw water, so that the process of producing water can be entered.

In the above-mentioned process of realizing the mud through jar 1 internal pressure effect, this automatic breather valve 15 is in the closed state, and this scheme can be applicable to the low mud pond of low height of low, and the high height of this mud pond is less than the height of mud bucket 2 bottom, also can be applicable to the high mud jar of low side.

For a sludge tank with lower height at the downstream, the following scheme can be adopted to realize sludge discharge: specifically when discharging mud, close water inlet 14 (specifically through closing water intaking valve 103), open mud valve 21, mud and raw water in jar body 1 can fall under the effect of gravity, and at this moment, automatic breather valve 15 opens for jar body 1 and outside atmosphere intercommunication, along with the discharge of mud, outside air can get into jar body 1 in order to balance jar body 1 internal and external pressure, makes the mud that is located the bottom can fall smoothly and discharges to the sludge impoundment. In this way, the power input can be further reduced, and the cost can be reduced.

That is, in the sludge discharge process, the automatic ventilation valve 15 can be opened or closed according to the actual situation, and no sludge pump is required to be arranged no matter the gravity sludge discharge or the pressure sludge discharge, so that the whole structure can be simplified and the cost can be reduced.

In this embodiment, the specific structure of the automatic ventilation valve 15 is not limited, for example, it may be a ball cock, when the water level in the tank 1 rises to the preset height position, the ball cock may act on the ball cock to close the automatic ventilation valve 15, and when the water level in the tank 1 falls, the ball cock falls under the action of gravity, and the automatic ventilation valve 15 may be opened.

As shown in fig. 1, the top end of the tank body 1 is further provided with a connection port 16, the top end of the membrane column 4 is further provided with a connection piece 42, the connection piece 42 is detachably connected with the connection port 16, the connection port 16 is further plugged by a cover plate, the cover plate is detachably connected with the connection port 16, and specifically, the cover plate can be also provided with a connection structure identical to that of the connection piece. When the quality of raw water is good, the membrane flux can be considered greatly, the installation quantity of the membrane columns 4 can be reduced properly, the connection ports 16 without the membrane columns 4 can be plugged through the cover plate, when the quality of the raw water is poor, the quantity of the membrane columns 4 can be increased, the membrane flux is reduced, and the water yield and the water quality are ensured. Therefore, the flexibility of the adjustable quantity of the membrane columns 4 can be improved, and the adaptability to water quality change is improved.

And when single membrane post 4 damages, also can change the membrane post 4 of damage through connector 16 and connecting piece 42, need not to take out all membrane post 4 whole from jar body 1, the operation is comparatively convenient. In addition, the connecting port 16 is positioned at the top end of the tank body 1, so that the tank body 1 does not need to be emptied when the membrane column 4 is disassembled, the operation is convenient and the efficiency is high, and the long-term stable operation of the immersed type ultrafiltration device can be ensured.

The connection member 42 and the connection port 16 are connected by a quick-connection interface, so that the efficiency of attaching and detaching the membrane column 4 can be improved. Specifically, the specific structure of the quick-connect interface is not limited, and for example, the quick-connect interface may be a chuck type quick-connect interface or a socket type quick-connect interface.

It will be appreciated that in order to ensure the tightness of the tank 1, the membrane column 4, when connected to the connection port 16 by the connection piece 42, ensures a sealing effect.

In this embodiment, the connecting piece 42 may be disposed at the top end of the membrane column 4, or the connecting piece 42 may be disposed on the outer wall of the membrane column 4, after the installation, the membrane column 4 is not completely located in the tank 1, the top end of the membrane column 4 has an extension section, the side wall of the extension section is not provided with a filtering hole, and the side wall of the portion of the membrane column 4 located in the tank 1 is provided with a filtering hole, so as to realize a filtering effect.

As shown in fig. 1, the water producing ends 41 of the membrane columns 4 are respectively connected with the branch pipes 6, and the branch pipes 6 are respectively communicated with the water producing pipes 5, and finally the produced water is discharged through one water producing pipe 5, so that the whole structure can be simplified.

When the membrane column 4 is operated for a long time, the membrane flux of the membrane column 4 is reduced, and the membrane column 4 needs to be backwashed to ensure the filtering effect and the filtering efficiency of the membrane column 4. As shown in fig. 1, the submerged ultrafiltration filter apparatus further comprises a backwash part 7, the backwash part 7 comprises a backwash pipe 71, and a backwash valve 72 and a backwash pump 73 which are arranged on the backwash pipe 71, wherein the backwash pipe 71 is communicated with the water producing end 41 of each membrane column 4, and specifically can be communicated with the branch pipes 6, or as shown in fig. 1, the water producing pipe 5 comprises a first section 51 and a second section 52, the first section 51 is communicated with each branch pipe 6, the second section 52 is provided with the water producing valve 53, and the backwash pipe 71 is communicated with the first section 51, namely, the first section 51, the second section 52 and the backwash pipe 71 form a Y-shaped structure, so that the integral structure can be further simplified.

Before the backwashing operation, the sludge is discharged first, raw water in the tank body 1 is emptied, then the water inlet valve 103 and the water producing valve 53 are closed, the backwashing pump 73 and the backwashing valve 72 are opened, and the membrane column 4 is backwashed, at this time, as no water exists in the tank body 1, the outside of the membrane column 4 is air, the resistance in the backwashing process is smaller, the backwashing effect is better, water after the membrane column 4 is washed falls under the action of gravity, the aeration unit 81, the inclined tube 3, the mud bucket 2 and the like positioned below play a flushing role, and the backwashed backwater can be mixed with the raw water which is subsequently introduced into the tank body 1 and then filtered.

Or, when the backwashing operation is performed, if water is present in the tank body 1, the water producing valve 53 and the water inlet valve 103 are closed, the backwashing pump 73 and the backwashing valve 72 are opened, and the backwashing water can be introduced into each membrane column 4 along the backwashing pipe 71 under the action of the backwashing pump 73 and enter the tank body 1 through the filter holes on the side wall of the membrane column 4, and in the process, the sludge attached to the surface of the membrane column 4 can be washed away to clean the membrane column 4, so that the filter holes are prevented from being blocked. The sludge mixed in the water after washing the membrane column 4 falls to the sedimentation zone 12 under the action of gravity and finally falls into the mud bucket 2.

As shown in fig. 1, the submerged ultrafiltration filter apparatus further comprises a gas washing section 8, the gas washing section 8 comprises an aeration unit 81 and a gas washing valve 83, the aeration unit 81 is communicated with an external gas source through a gas pipe 82, the aeration unit 81 is located in the tank 1 and between the precipitation zone 12 and the membrane filtration zone 13, and an aeration port 811 of the high aeration unit 81 is provided upward for aerating the membrane column 4 in the membrane filtration zone 13.

When the raw water introduced into the tank body 1 flows upwards into the membrane filtration zone 13 after gravity sedimentation and precipitation of the inclined tube 3, the concentration of sludge is lower, and the condition of sludge turning can not be caused in the process of aeration cleaning the membrane column 4 by the aeration unit 81, so that the aeration cleaning effect is improved.

The immersed ultrafiltration filter device further comprises a water distributor, as shown in fig. 1, the side wall of the tank body 1 is provided with a mounting hole 17, the water distributor is communicated with a water inlet pipe 101, the water inlet pipe 101 is further provided with a water inlet pump 102 and a water inlet valve 103 which are positioned outside the tank body 1, the water distributor comprises a pipe portion 91 and a horn portion 92, the pipe portion 91 penetrates through the mounting hole 17 and is communicated between the water inlet pipe 101 and the horn portion 92, the horn portion 92 is in a horn shape and is positioned in the tank body 1, the bottom width of the horn portion 92 is larger than the top width, and the bottom opening of the horn portion 92 forms the water inlet 14.

After the water inlet pump 102 and the water inlet valve 103 are opened, raw water enters the pipe part 91 along the water inlet pipe 101 under the power drive of the water inlet pump 102 and is introduced into the lower part of the sedimentation zone 12 through the horn part 92, the raw water is introduced into the tank body 1 through the horn part 92, the flow rate of the raw water at the water inlet 14 can be reduced, the impact on the sludge in the sludge storage zone 11 is reduced, the condition of sludge turning is avoided, and the raw water with lower flow rate can also be beneficial to the rapid sedimentation of suspended pollutants with large particles inside.

In order to reduce the flow rate of the raw water at the water inlet 14, the horn 92 needs to have a certain height, so in this embodiment, as shown in fig. 1, the mounting hole 17 provided on the sidewall of the tank 1 is located above the precipitation zone 12, the pipe 91 is located above the precipitation zone 12, and the horn 92 passes through the precipitation zone 12 along the height direction, so that the overall height of the tank 1 can be reduced while ensuring enough installation space of the water distributor, and the overall volume of the submerged ultrafiltration filter apparatus can be reduced.

As shown in fig. 1, at least three brackets 18 are further arranged at the bottom of the tank body 1 along the circumferential direction, each bracket 18 is used for supporting the tank body 1, the mud bucket 2 is in a tapered structure with a reduced bottom, the mud bucket 2 is located at the bottom of the tank body 1 and located in a space formed by surrounding the brackets 18, and the height of the mud bucket 2 is lower than that of the brackets 18. By the arrangement, the stability of the tank body 1 can be ensured, and the whole volume of the tank body 1 can be reduced.

The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims (9)

1. The immersed ultrafiltration filter equipment is characterized by comprising a tank body (1) which is closed, wherein a mud storage area (11), a sedimentation area (12) and a membrane filtration area (13) are sequentially arranged in the tank body (1) from bottom to top, the tank body (1) is also provided with a water inlet (14), and the water inlet (14) is positioned below the sedimentation area (12);

the bottom of the mud storage area (11) is provided with a mud bucket (2);

the sedimentation zone (12) is provided with a layer of inclined pipes (3) along the section thereof;

the membrane filtration area (13) is provided with a plurality of membrane columns (4), water producing ends (41) of the membrane columns (4) are respectively communicated with a water producing pipe (5), and the water producing pipe (5) is provided with a water producing valve (53);

the top of the tank body (1) is also provided with a connecting port (16), the top of the membrane column (4) is also provided with a connecting piece (42), the connecting piece (42) is detachably connected with the connecting port (16), and the connecting port (16) can be plugged through a cover plate which is detachably connected.

2. The immersed ultrafiltration filter apparatus according to claim 1, wherein the top of the tank (1) is further provided with an automatic ventilation valve (15), and the bottom of the mud bucket (2) is provided with a mud discharge valve (21).

3. The submerged ultrafiltration filter apparatus of claim 1, wherein the connection (42) and the connection port (16) are connected by a quick-connect interface.

4. A submerged ultrafiltration filter apparatus according to any of claims 1-3, wherein the water producing end (41) of each membrane column (4) is connected with a respective branch pipe (6), each branch pipe (6) being in communication with the respective water producing pipe (5).

5. The submerged ultrafiltration filter apparatus according to claim 4, further comprising a backwash part (7), the backwash part (7) comprising a backwash pipe (71) and a backwash valve (72) and a backwash pump (73) provided to the backwash pipe (71), the backwash pipe (71) being in communication with the water producing end (41) of each membrane column (4).

6. An submerged ultrafiltration filter apparatus according to claim 5, wherein the water producing pipe (5) comprises a first section (51) and a second section (52), the first section (51) being in communication with each of the branch pipes (6), the second section (52) being provided with a produced water valve (53), the backwash pipe (71) being in communication with the first section (51).

7. A submerged ultrafiltration filter apparatus according to any of claims 1-3, further comprising a gas wash section (8), the gas wash section (8) comprising an aeration unit (81), a gas pipe (82) and a gas wash valve (83);

the aeration unit (81) is communicated with an air source through the air pipe (82) and is positioned between the precipitation zone (12) and the membrane filtration zone (13), an aeration port (811) of the aeration unit (81) is arranged upwards, and the air washing valve (83) is arranged on the air pipe (82).

8. A submerged ultrafiltration filter apparatus according to any of claims 1-3, further comprising a water distributor comprising a pipe section (91) and a flare section (92) located in the tank (1), the pipe section (91) passing through a mounting hole (17) provided in the side wall of the tank (1) and communicating between a water inlet pipe (101) and the flare section (92), the bottom width of the flare section (92) being larger than the top width, and the bottom opening of the flare section (92) forming the water inlet (14).

9. An submerged ultrafiltration filter apparatus according to claim 8, wherein the pipe section (91) is located above the sedimentation zone (12), and the horn section (92) passes through the sedimentation zone (12) in the height direction.