CN218146045U

CN218146045U - MBR sewage treatment device

Info

Publication number: CN218146045U
Application number: CN202222750102.8U
Authority: CN
Inventors: 黄初
Original assignee: Guangdong Skyview Environmental Science And Technology Co ltd
Current assignee: Guangdong Skyview Environmental Science And Technology Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2022-12-27
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses MBR sewage treatment equipment, which comprises a treatment unit, wherein the treatment unit comprises a membrane tank, an aerobic tank, a water production and storage mechanism and a biochemical sludge storage tank; be equipped with membrane column, return sludge pump and excess sludge pump in the membrane cisterna, the input port of membrane column the input port of return sludge pump with the input port of excess sludge pump all is located in the membrane cisterna, the drainage delivery port of membrane column with produce water storage mechanism intercommunication, the mud delivery outlet of return sludge pump with the mud input port intercommunication in good oxygen pond, be equipped with dissolved oxygen appearance in the good oxygen pond, the mud delivery outlet of excess sludge pump with biochemical sludge storage tank intercommunication. MBR sewage treatment device has solved current membrane cisterna and has used for a long time after, and mud can be amassed more and more, leads to MBR membrane cisterna's water storage volume to reduce, makes MBR sewage treatment's problem that efficiency is lower and lower more.

Description

MBR sewage treatment device

Technical Field

The utility model relates to a sewage treatment field, in particular to MBR sewage treatment device.

Background

MBR (Membrane Bio-reactor) is a sewage treatment process that combines Membrane separation technology with traditional biological treatment technology. The process adopts membrane separation to replace a secondary sedimentation tank in the traditional activated sludge process for sludge-water separation, and has the advantages of small occupied area, excellent effluent quality, strong impact load resistance, high volume load and the like compared with the traditional activated sludge process. The membrane module in the membrane column of current setting in MBR membrane cisterna usually adopts the mode of aeration to maintain the high cross-flow speed of membrane face, reaches the purpose that delays the membrane pollution, but after using for a long time, does not pass through filtration membrane's mud can be more and more to make the mud in MBR membrane cisterna amalgamation more and more, lead to the water holding capacity in MBR membrane cisterna to reduce, make MBR sewage treatment's efficiency more and more low.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects existing in the prior art, the utility model provides an MBR sewage treatment device, which aims to solve the problems.

The utility model provides a technical scheme that its technical problem adopted is: an MBR sewage treatment device comprises a treatment unit, wherein the treatment unit comprises a membrane tank, an aerobic tank, a water production and storage mechanism and a biochemical sludge storage tank;

be equipped with membrane column, backward flow sludge pump and excess sludge pump in the membrane cisterna, the input port of membrane column the input port of backward flow sludge pump with the input port of excess sludge pump all is located in the membrane cisterna, the drainage delivery port of membrane column with produce water storage mechanism intercommunication, the mud delivery outlet of backward flow sludge pump with the mud input port intercommunication in good oxygen pond, be equipped with dissolved oxygen appearance in good oxygen pond, the mud delivery outlet of excess sludge pump with biochemical sludge storage tank intercommunication.

It is worth mentioning that the input port of the return sludge pump and the input port of the excess sludge pump are both directed towards the bottom of the membrane tank.

Optionally, the treatment unit further comprises an aeration mechanism, the aeration mechanism comprises a first aeration component and a second aeration component, the first aeration component comprises a first aeration pipe, a first fan and a membrane tank air inlet valve, an air outlet of the first fan is communicated with an input end of the membrane tank air inlet valve, an input end of the membrane tank air inlet valve is communicated with an air inlet of the first aeration pipe, and the first aeration pipe is located in the membrane tank;

the second aeration component comprises a second aeration pipe and a second fan, the air outlet of the first fan is communicated with the air outlet of the second fan, the air outlet of the second fan is communicated with the air inlet of the second aeration pipe, and the second aeration pipe is arranged in the aerobic tank.

Specifically, the water production and storage mechanism comprises a clean water tank, a water production valve, a water production pump, an angle valve and a vacuum generator; the filtered water outlet of the membrane column is communicated with the input end of the water production valve, the output end of the water production valve is communicated with the input end of the water production pump, and the output end of the water production pump is communicated with the water inlet of the clean water tank; the output end of the water production valve is also communicated with the vacuum generator through the angle valve.

Preferably, the processing unit further comprises a backwashing mechanism, and the backwashing mechanism comprises a cleaning water tank, a cleaning water inlet valve, a cleaning water pump and a membrane cleaning valve;

the output end of the water production pump is also communicated with the water inlet of the cleaning water tank through the cleaning water inlet valve, the water outlet of the cleaning water tank is communicated with the input end of the cleaning water pump, the output end of the cleaning water pump is communicated with the input end of the membrane cleaning valve, and the output end of the membrane cleaning valve is communicated with the filtered water outlet of the membrane tank.

It is worth to say that the physical unit further comprises an acid and alkali washing mechanism, wherein the acid and alkali washing mechanism comprises a citric acid storage tank, a citric acid pump, a sodium hypochlorite storage tank, a sodium hypochlorite pump and a sodium hypochlorite dosing valve;

a first stirrer is arranged in the citric acid storage tank, and the output end of the citric acid storage tank is communicated with the input end of the membrane cleaning valve through the citric acid pump;

the sodium hypochlorite storage tank is internally provided with a second stirrer, the output end of the sodium hypochlorite storage tank is communicated with the input end of a sodium hypochlorite pump, the output end of the sodium hypochlorite pump is communicated with the input end of a sodium hypochlorite dosing valve, and the output end of the sodium hypochlorite dosing valve is communicated with the input end of a membrane cleaning valve.

Optionally, the MBR sewage treatment plant comprises a plurality of treatment units.

The beneficial effects of the utility model reside in that: MBR sewage treatment device in the membrane column stops to treat that the drainage filters and stops to produce behind the water storage mechanism carries the drainage, open return sludge pump, return sludge pump can take out the mud that does not have the filtration membrane through the membrane column and deposit in the membrane tank good oxygen pond, dissolved oxygen appearance in the good oxygen pond carries out redox reaction to mud, the harmful substance among the oxidation sludge, so, just can avoid the mud in the membrane tank long-pending more to avoid the water storage capacity in membrane tank to reduce, guarantee sewage treatment's efficiency. In addition, in the process that the membrane column filters the water to be filtered and conveys the filtered water to the water production and storage mechanism, the excess sludge pump is operated intermittently, and partial sludge left after the membrane column filters the water to be filtered is discharged to the biochemical sludge storage tank for centralized treatment by utilizing the excess sludge pump, so that the speed of sludge deposition in the membrane tank can be reduced, the times of membrane tank shutdown can be further reduced, and the time of membrane tank operation each time can be prolonged.

Drawings

FIG. 1 is a schematic piping diagram of a single processing unit in one embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the dashed line box A of FIG. 1;

FIG. 3 is an enlarged schematic view of the dashed box B of FIG. 1;

FIG. 4 is an enlarged schematic view of the dashed box C of FIG. 1;

in the figure: 1 a processing unit; 2, a membrane pool; 21 a membrane column; 211 filtering the water outlet; 22 return sludge pump; 23 excess sludge pump; 3, an aerobic tank; 4, an aeration mechanism; 41 a first aeration assembly; 411 a first aerator pipe; 412 a first fan; 413 membrane pool air inlet valve; 42 a second aeration assembly; 421 a second aeration pipe; 422 a second fan; 5 biochemical sludge storage tank; 6 a water producing and storing mechanism; 61 clean water pool; a 62 water producing valve; 63 a water producing pump; a 64-degree valve; 65 a vacuum generator; 7 backwashing mechanism; 71 cleaning the water tank; 72 cleaning water inlet valve; 73 cleaning the water pump; 74 membrane purge valve; 8, an acid-base washing mechanism; 81 a citric acid storage tank; 811 citric acid pump; 812 a first agitator; 82 sodium hypochlorite storage tanks; 821 sodium hypochlorite pump; 822 a sodium hypochlorite dosing valve; 823 second stirrer.

Detailed Description

The following description will further explain embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-4, an MBR sewage treatment apparatus comprises a treatment unit 1, wherein the treatment unit 1 comprises a membrane tank 2, an aerobic tank 3, a water production and storage mechanism 6 and a biochemical sludge storage tank 5;

be equipped with membrane column 21, return sludge pump 22 and excess sludge pump 23 in the membrane cisterna 2, the input port of membrane column 21, the input port of return sludge pump 22 and the input port of excess sludge pump 23 all are located in the membrane cisterna 2, the drainage delivery port 211 of membrane column 21 with produce water storage mechanism 6 intercommunication, return sludge pump 22's mud delivery outlet with the mud input port intercommunication of good oxygen pond 3, be equipped with dissolved oxygen appearance in the good oxygen pond 3, the mud delivery outlet of excess sludge pump 23 with biochemical sludge storage tank 5 intercommunication.

In this embodiment, membrane tank 2 is equipped with and treats the drainage water inlet, treat the external effluent water sump of drainage water inlet, the water of effluent water sump is followed treat that the drainage water inlet enters into in the membrane tank 2, be located the membrane tank 2 treat that the drainage gets into behind the filtration membrane that is located the lateral wall of membrane column 21 in the membrane column 21, treat to become the drainage after the drainage filters, the drainage process the drainage water outlet 211 flow direction of membrane column 21 produce water storage mechanism 6.

In the MBR sewage treatment device, membrane column 21 stops to treat that the drainage filters and stops to produce water storage mechanism 6 and carry behind the drainage, opens backward flow sludge pump 22, backward flow sludge pump 22 can be taken out the mud that does not pass through the filtration membrane of membrane column 21 and deposit in membrane tank 2 good oxygen pond 3, the dissolved oxygen appearance in the good oxygen pond 3 carries out the redox reaction to mud, and harmful substance among the oxidation sludge, so, just can avoid the mud in the membrane tank 2 to amass more to avoid the reservoir capacity of membrane tank 2 to reduce, guarantee sewage treatment's efficiency. In addition, in the process that the membrane column 21 filters water to be filtered and the filtered water is conveyed to the water production and storage mechanism 6, the excess sludge pump 23 is operated intermittently, and partial sludge left after the membrane column 21 filters the water to be filtered is discharged to the biochemical sludge storage tank 5 for centralized treatment by utilizing the excess sludge pump 23, so that the speed of sludge deposition in the membrane tank 2 can be reduced, the stop times of the membrane tank 2 can be further reduced, and the operation time of the membrane tank 2 can be prolonged each time.

In some embodiments, the input of the return sludge pump 22 and the input of the excess sludge pump 23 are both directed toward the bottom of the membrane tank 2. The membrane column 21 filters the sludge left by the water to be filtered, and the sludge is deposited at the bottom of the membrane tank 2 under the action of gravity, so that the input port of the return sludge pump 22 and the input port of the excess sludge pump 23 can face the deposited sludge, and the efficiency of extracting the sludge is improved.

It is worth to say that the treatment unit 1 further comprises an aeration mechanism 4, the aeration mechanism 4 comprises a first aeration assembly 41 and a second aeration assembly 42, the first aeration assembly 41 comprises a first aeration pipe 411, a first fan 412 and a membrane tank air inlet valve 413, an air outlet of the first fan 412 is communicated with an input end of the membrane tank air inlet valve 413, an input end of the membrane tank air inlet valve 413 is communicated with an air inlet of the first aeration pipe 411, and the first aeration pipe 411 is located in the membrane tank 2;

the second aeration assembly 42 comprises a second aeration pipe 421 and a second fan 422, the air outlet of the first fan 412 is communicated with the air outlet of the second fan 422, the air outlet of the second fan 422 is communicated with the air inlet of the second aeration pipe 421, and the second aeration pipe 421 is arranged in the aerobic tank 3.

In the sewage treatment process, through aeration treatment, the air is forcibly introduced into the sewage, so that the sewage in the membrane pool 2 is in contact with the air to be oxygenated, the transfer of oxygen in the air to the sewage is accelerated, the suspended matters in the membrane pool 2 are prevented from sinking, the contact of organic matters in the membrane pool 2 with microorganisms and dissolved oxygen is enhanced, and the organic matters in the sewage are subjected to oxidative decomposition. In this embodiment, after the membrane tank air inlet valve 413 is opened, and the membrane tank air inlet valve 413 is opened in place, the first fan 412 is started, and the first aeration pipe 411 is used to perform aeration treatment on the water to be filtered in the membrane tank 2; after the second fan 422 is started, the water containing the sludge in the aerobic tank 3 can be aerated through the second aeration pipe 421. Because the air outlet of the first fan 412 is communicated with the air outlet of the second fan 422, the first fan 412 and the second fan 422 can also serve the purpose of being used for standby.

Optionally, the water producing and storing mechanism 6 comprises a clean water tank 61, a water producing valve 62, a water producing pump 63, an angle valve 64 and a vacuum generator 65; the filtered water outlet 211 of the membrane column 21 is communicated with the input end of the water producing valve 62, the output end of the water producing valve 62 is communicated with the input end of the water producing pump 63, and the output end of the water producing pump 63 is communicated with the water inlet of the clean water tank 61; the output of the water production valve 62 is also in communication with the vacuum generator 65 through the angle valve 64.

Before filtering the water to be filtered, the water to be filtered in the membrane tank 2 is aerated through the first aeration pipe 411 to prevent suspended objects in the membrane tank 2 from sinking; then, the angle valve 64 is opened, the vacuum generator 65 is started again, and air in a pipeline between the output end of the water production valve 62 and the input end of the water production pump 63 is pumped; and when the liquid level of the membrane pool 2 is greater than a preset high liquid level set value of the membrane pool 2, opening the water production valve 62, starting the water production pump 63, and pumping the filtered water from the filtered water outlet 211 to the clean water pool 61 for storage by utilizing the siphon principle.

Specifically, the processing unit 1 further comprises a backwashing mechanism 7, wherein the backwashing mechanism 7 comprises a cleaning water tank 71, a cleaning water inlet valve 72, a cleaning water pump 73 and a membrane cleaning valve 74;

the output end of the water producing pump 63 is also communicated with the water inlet of the cleaning water tank 71 through the cleaning water inlet valve 72, the water outlet of the cleaning water tank 71 is communicated with the input end of the cleaning water pump 73, the output end of the cleaning water pump 73 is communicated with the input end of the membrane cleaning valve 74, and the output end of the membrane cleaning valve 74 is communicated with the filtered water outlet 211 of the membrane tank 2. In this embodiment, the water outlet of the cleaning water tank 71 is located below the water inlet of the cleaning water tank 71, and the water in the cleaning water tank 71 flows out from the water outlet of the cleaning water tank 71 under the action of gravity.

In the process that the filtered water flows to the clean water tank 61 after coming out of the filtered water outlet 211, the cleaning water inlet valve 72 is opened, and the filtered water can enter the cleaning water tank 71 and be stored in the cleaning water tank 71. When backwashing is needed, the water production pump 63 is closed, the water production valve 62 is closed, the membrane cleaning valve 74 is opened, then the cleaning water pump 73 is started, filtered water in the cleaning water tank 71 can reversely enter the membrane column 21 from the filtered water outlet 211, the filtering membrane in the membrane column 21 is reversely washed, sludge attached to the surface of the filtering membrane is washed, and the filtering membrane is prevented from being blocked by the sludge.

Preferably, the treatment unit 1 further comprises an acid and alkali washing mechanism 8, wherein the acid and alkali washing mechanism 8 comprises a citric acid storage tank 81, a citric acid pump 811, a sodium hypochlorite storage tank 82, a sodium hypochlorite pump 821 and a sodium hypochlorite dosing valve 822;

a first stirrer 812 is arranged in the citric acid storage tank 81, and the output end of the citric acid storage tank 81 is communicated with the input end of the membrane cleaning valve 74 through the citric acid pump 811;

a second stirrer 823 is arranged in the sodium hypochlorite storage tank 82, the output end of the sodium hypochlorite storage tank 82 is communicated with the input end of the sodium hypochlorite pump 821, the output end of the sodium hypochlorite pump 821 is communicated with the input end of the sodium hypochlorite dosing valve 822, and the output end of the sodium hypochlorite dosing valve 822 is communicated with the input end of the membrane cleaning valve 74.

In the backwashing process, citric acid can be added into the filtered water entering the membrane column 21 from the filtered water outlet 211 for acid washing or hypochlorous acid can be added for alkali washing. When acid washing is carried out, the first stirrer 812 is started, citric acid in the citric acid storage tank 81 is stirred, then the citric acid pump 811 is started, and the citric acid can be mixed with filtered water from the front of the input end of the membrane cleaning valve 74, then is conveyed into the membrane column 21 through the filtered water outlet 211, enters the membrane tank 2 through the membrane column 21, and is subjected to standing and soaking treatment on the membrane tank 2; when alkaline cleaning is performed, the second stirrer 823 is started to stir sodium hypochlorite in the sodium hypochlorite storage tank 82, the sodium hypochlorite pump 821 is started after the sodium hypochlorite dosing valve 822 is opened, the sodium hypochlorite can be mixed with filtered water from the front of the input end of the membrane cleaning valve 74, then the mixed water is conveyed into the membrane column 21 through the filtered water outlet 211, enters the membrane tank 2 through the membrane column 21, and the membrane tank 2 is subjected to standing and soaking treatment. In this embodiment, pickling and alkali wash can not go on simultaneously, promptly when carrying out the pickling, sodium hypochlorite medicine adding valve 822 and sodium hypochlorite pump 821 close, when carrying out the alkali wash, citric acid pump 811 closes to avoid citric acid and sodium hypochlorite to go on simultaneously and take place the chemical reaction in the pipeline and neutralize the back, reduced the chemical reaction performance of citric acid or sodium hypochlorite. After acid washing or alkali washing, the membrane tank 2 is aerated, so that the efficiency of cleaning the membrane column 21 can be improved.

It is worth mentioning that the MBR sewage treatment plant comprises a plurality of treatment units 1. Therefore, the plurality of treatment units 1 can cooperate to realize alternate interval operation, and when one part of the treatment units 1 stops filtering and is cleaned, the rest treatment units 1 can continue filtering, so that the sewage treatment efficiency of the MBR sewage treatment equipment is ensured.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The MBR sewage treatment equipment comprises a treatment unit and is characterized in that: the treatment unit comprises a membrane tank, an aerobic tank, a water production and storage mechanism and a biochemical sludge storage tank;

2. The MBR sewage treatment device of claim 1, wherein: the input port of the return sludge pump and the input port of the excess sludge pump face the bottom of the membrane tank.

3. The MBR sewage treatment plant of claim 2, wherein: the treatment unit further comprises an aeration mechanism, the aeration mechanism comprises a first aeration component and a second aeration component, the first aeration component comprises a first aeration pipe, a first fan and a membrane pool air inlet valve, an air outlet of the first fan is communicated with an input end of the membrane pool air inlet valve, an input end of the membrane pool air inlet valve is communicated with an air inlet of the first aeration pipe, and the first aeration pipe is positioned in the membrane pool;

4. The MBR sewage treatment device of claim 1, wherein: the water production and storage mechanism comprises a clean water tank, a water production valve, a water production pump, an angle valve and a vacuum generator; the filtered water outlet of the membrane column is communicated with the input end of the water production valve, the output end of the water production valve is communicated with the input end of the water production pump, and the output end of the water production pump is communicated with the water inlet of the clean water tank; the output end of the water production valve is also communicated with the vacuum generator through the angle valve.

5. The MBR sewage treatment plant of claim 4, wherein: the treatment unit also comprises a backwashing mechanism, and the backwashing mechanism comprises a cleaning water tank, a cleaning water inlet valve, a cleaning water pump and a membrane cleaning valve;

6. The MBR sewage treatment device of claim 5, wherein: the treatment unit also comprises an acid-base washing mechanism, wherein the acid-base washing mechanism comprises a citric acid storage tank, a citric acid pump, a sodium hypochlorite storage tank, a sodium hypochlorite pump and a sodium hypochlorite dosing valve;

7. The MBR sewage treatment plant of claim 1, wherein: the MBR sewage treatment device comprises a plurality of treatment units.