CN217449670U

CN217449670U - Automatic cleaning device of MBR (membrane bioreactor) for sewage treatment

Info

Publication number: CN217449670U
Application number: CN202221513771.7U
Authority: CN
Inventors: 黄格; 孙建亭; 郑威; 刘思源; 刘凡; 陈伯涛; 胡钢; 吕磊磊; 张涛; 冯婵君; 丰范; 张意
Original assignee: Wuhan Huantou Qianzishan Environmental Industry Co ltd
Current assignee: Wuhan Huantou Qianzishan Environmental Industry Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-09-20
Anticipated expiration: 2032-06-15

Abstract

The utility model provides a self-cleaning device for sewage treatment's MBR membrane bioreactor, including membrane case and washing subassembly, the inside of membrane case is provided with the MBR membrane module, the water inlet has been seted up to one side of membrane case, the opposite side intercommunication of membrane case has the product water subassembly, the bottom of membrane case is provided with the evacuation hole, it includes the acidification subassembly to wash the subassembly, add the alkali subassembly, the liquid feeding subassembly, add the medicine subassembly and wash the bucket, add the acid subassembly, add the alkali subassembly, the liquid feeding subassembly with add the medicine subassembly all with wash the bucket intercommunication, add the one end and the membrane case intercommunication that the medicine subassembly kept away from the washing bucket, it is used for carrying out the pickling to membrane MBR to add the acid subassembly, it is used for washing with alkaline to the MBR membrane module to add the alkali subassembly, it can wash the tow sides of MBR membrane module to add the medicine subassembly, can make the membrane module by rinse thoroughly.

Description

Automatic cleaning device of MBR (membrane bioreactor) for sewage treatment

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to an automatic cleaning device of an MBR (membrane bioreactor) for sewage treatment.

Background

In the sewage treatment in the field of environmental management, after the biochemical treatment process flow is finished, in order to ensure the effluent quality and reduce the effluent SS, a Membrane module is usually used for replacing a secondary sedimentation tank at the tail end of the traditional biological treatment technology, the concentration of high-activity sludge is kept in a bioreactor, the biological treatment organic load is improved, the occupied area of a sewage treatment facility is reduced, the residual sludge amount is reduced by keeping low sludge load, and an MBR Membrane-bioreactor (Membrane Bio-Reactor) organically combines the Membrane separation technology and the biological treatment technology. But use MBR membrane bioreactor to replace traditional sedimentation tank, in the in-service use, the MBR membrane will be polluted and blockked up after using a period, and the main organic matter and the pollution of inorganic matter need be put out MBR membrane integral hoisting and wash at fixed washing pond in artifical cleaning process, wastes time and energy and wastes medicament and can't thorough sanitization.

SUMMERY OF THE UTILITY MODEL

In order to make up for the above insufficiency, the utility model provides an automatic cleaning device of MBR membrane bioreactor for sewage treatment, which aims to solve the problems that the MBR membrane bioreactor in the prior art wastes time and energy and wastes medicament when cleaning MBR membrane and can not be thoroughly cleaned.

For solving the technical scheme, the utility model discloses a realize like this:

an automatic cleaning device of an MBR membrane bioreactor for sewage treatment, comprising:

the membrane box is internally provided with an MBR membrane assembly, one side of the membrane box is provided with a water inlet, the other side of the membrane box is communicated with a water production assembly, and the bottom of the membrane box is provided with a drain hole;

the washing subassembly, wash the subassembly including acidification subassembly, alkali adding subassembly, liquid feeding subassembly, add medicine subassembly and washing bucket, acidification subassembly add alkali adding subassembly the liquid feeding subassembly with add the medicine subassembly all with the washing bucket intercommunication, it keeps away from to add the medicine subassembly the one end of wasing the bucket with membrane case intercommunication.

The utility model discloses an in one embodiment, the acidification subassembly includes first measuring pump, the feed liquor end of first measuring pump passes through the inside intercommunication of pipeline with first explosive box, the flowing back end of first measuring pump through first fluid-discharge tube with the inside intercommunication of washing bucket.

The utility model discloses an in one embodiment, the alkali feeding subassembly includes the second measuring pump, the feed liquor end of second measuring pump passes through the inside intercommunication of pipeline with second explosive box, the flowing back end of second measuring pump pass through the second fluid-discharge tube with the inside intercommunication of washing bucket.

The utility model discloses an in one embodiment, the liquid feeding subassembly includes the water pump, the feed liquor end of water pump and the one end intercommunication of first inlet tube, the flowing back end of water pump pass through the pipeline with the inside intercommunication of wasing the bucket.

In an embodiment of the present invention, a drug inlet is disposed on one side of the membrane box, and the drug inlet is located on the same side of the membrane box as the water inlet.

The utility model discloses an in the embodiment, produce the water subassembly including producing the water pump, produce the feed liquor end of water pump and the one end intercommunication of second inlet tube, the other end of second inlet tube with the inside water pipe intercommunication of producing of membrane case.

The utility model discloses an in the embodiment, add the medicine subassembly and include the scavenging pump, the feed liquor end of scavenging pump pass through the pipeline with the inside intercommunication of wash bowl, the flowing back end of scavenging pump and the one end intercommunication of scavenge pipe, the other end of scavenge pipe is provided with three solenoid valve, three solenoid valve's first mouth and the one end intercommunication of first washing branch pipe, the other end of first washing branch pipe with advance medicine mouth intercommunication, three solenoid valve's second mouth and the one end intercommunication of second washing branch pipe, the second wash the other end of branch pipe with one side intercommunication of second inlet tube.

The utility model discloses an in the embodiment, still include aeration components, aeration components includes aeration fan, aeration fan's exhaust end and the one end intercommunication of aeration pipe, aeration pipe's the other end extends to membrane case's inboard bottom, aeration pipe extends to the one end of the inboard bottom of membrane case and aeration branch's inlet end intercommunication, aeration branch evenly distributed in membrane case's bottom, aeration port that the equidistance distributes is seted up on aeration branch's surface.

The utility model discloses an in the embodiment, still include the controller, the controller respectively with produce the water subassembly the acidification subassembly the alkalifying subassembly the liquid feeding subassembly with add medicine subassembly communication connection.

The utility model discloses an in an embodiment, the evacuation hole communicates with the one end of blow off pipe, the other end and the blowdown of blow off pipe are kept in the pond and are communicated, one side of blow off pipe is provided with the control valve.

The utility model has the advantages that:

1. the utility model discloses a wash the subassembly including adding sour subassembly, it is used for carrying out the pickling to the MBR membrane module to add sour subassembly, provide power by first measuring pump, go into the inside acid medicament pump of the inside storage of first explosive box inside the washing bucket, provide power extraction running water by the water pump again, go into the washing bucket inside with the running water pump and dilute the acid medicament, the acid medicament pump after providing power by the scavenging pump at last will diluting soaks the washing MBR membrane module in the membrane incasement portion, it can be dissolved in the impurity of acid medicament to clear up MBR membrane module internal surface and surface, need not the manual cleaning, time saving and labor saving, the efficiency of cleaning the MBR membrane module is improved.

2. The utility model discloses a wash the subassembly including adding the alkali subassembly, it is used for carrying out the alkali wash to the MBR membrane module to add the alkali subassembly, provide power by the second measuring pump, go into the alkaline medicament pump of the inside storage of second explosive box inside the washing bucket inside, provide power extraction running water by the water pump again, go into the washing bucket inside with the running water pump and dilute the alkaline medicament, it goes into the inside washing MBR membrane module of membrane incasement portion to provide power with the alkaline medicament pump after diluting by the scavenging pump at last, it can be dissolved in the impurity of alkaline medicament to clear up MBR membrane module internal surface and surface, need not manual cleaning, time saving and labor saving, the efficiency of MBR membrane module is washd in the improvement.

3. The utility model discloses a wash the subassembly including adding the medicine subassembly, it is used for going into the inside washing MBR membrane module of membrane case with the inside washing liquid pump of washing bucket to add the medicine subassembly, the scavenge pipe passes through three solenoid valve and washs branch pipe and second washing branch pipe intercommunication with first, it soaks the washing to wash the MBR membrane module from the surface of MBR membrane module to get into the inside washing liquid of membrane case through first washing branch pipe, wash away from the inner surface of MBR membrane module to the MBR membrane module from the washing liquid that the branch pipe got into the membrane case inside of second, soak and wash, fully dissolve the impurity that adheres to the interior surface of MBR membrane module, through the utility model discloses a add the medicine subassembly and can wash the internal surface and the surface two sides of MBR membrane module, can make the MBR membrane module by rinse thoroughly.

4. The utility model discloses a membrane case one side is provided with the aeration subassembly, the aeration subassembly is used for stirring the washing liquid, adopt the washing liquid to soak the MBR membrane module, after soaking a period, start the aeration subassembly, provide power by aeration fan, gas loops through the aeration pipe, aeration branch pipe and aeration opening get into inside the membrane case, the gaseous membrane silk that directly sweeps of upward motion, reduce near the mud accumulation of MBR membrane module, keep MBR membrane module surface cleaning, and the aeration subassembly can play the stirring effect to the washing liquid, it is more thorough to make the washing liquid to the cleanness of MBR membrane module.

5. The utility model discloses a wash subassembly and controller communication connection, by the automatic operation of controller control washing subassembly, realize the technological effect of self-cleaning MBR membrane module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a sectional view of an automatic cleaning device of an MBR membrane bioreactor for sewage treatment according to an embodiment of the present invention.

In the figure: 1-a membrane box; 101-MBR membrane module; 102-a water inlet; 103-a water producing assembly; 1030-water producing pump; 1031-a second water inlet pipe; 104-evacuation holes; 105-a medicine inlet; 2-cleaning the component; 201-an acid addition component; 2010-a first metering pump; 2011-first medication box; 2012-a first drain pipe; 202-a base addition component; 2020-second metering pump; 2021-a second medicine storage box; 2022-second drain pipe; 203-liquid adding assembly; 2030-water pump; 204-a dosing assembly; 2040-purge pump; 2041-cleaning tube; 2042-three-way solenoid valve; 2043-first cleaning manifold; 2044-second cleaning manifold; 205-washing the barrel; 3-an aeration component; 301-aeration fan; 302-an aerator pipe; 303-aeration branch pipes; 4-a controller.

Detailed Description

The following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

Referring to fig. 1, the present invention provides a technical solution:

the membrane box comprises a membrane box 1, wherein an MBR (membrane bioreactor) membrane assembly 101 is arranged inside the membrane box 1, a water inlet 102 is formed in one side of the membrane box 1, a water production assembly 103 is communicated with the other side of the membrane box 1, and a drain hole 104 is formed in the bottom of the membrane box 1;

wash subassembly 2, wash subassembly 2 including acidification subassembly 201, add alkali subassembly 202, liquid feeding subassembly 203, add medicine subassembly 204 and wash bucket 205, acidification subassembly 201, add alkali subassembly 202, liquid feeding subassembly 203 and add medicine subassembly 204 and all communicate with washing bucket 205, add the one end that medicine subassembly 204 kept away from washing bucket 205 and communicate with bellows 1.

Specifically, the membrane tank 1 is a tank body with an opening at the top, the water inlet 102 is communicated with one end of a water inlet pipeline, the other end of the water inlet pipeline is communicated with the inside of the biochemical pool, a water inlet valve is arranged on one side of the water inlet pipeline, liquid coming from the biochemical pool enters the inside of the membrane tank 1 from the water inlet 102, and filtered water is discharged through the water production assembly 103 under the action of the MBR membrane assembly 101.

Further, for convenience of description, the acidic agent and the alkaline agent are collectively referred to as cleaning solution, a surface of the MBR membrane module 101, which is first in liquid contact with the biochemical tank, is referred to as an outer surface of the MBR membrane module 101, a surface of the MBR membrane module 101, which is opposite to the outer surface of the MBR membrane module 101, is referred to as an inner surface of the MBR membrane module 101, a surface of the membrane tank 1, which is opposite to the outer surface of the MBR membrane module 101, is referred to as a front surface of the membrane tank 1, a surface of the membrane tank 1, which is opposite to the front surface of the membrane tank 1, is referred to as a back surface of the membrane tank 1, the cleaning module 2 is used for cleaning the MBR membrane module 101 inside the membrane tank 1, the acid adding module 201 is used for acid cleaning the MBR membrane module 101, and is used for removing impurities, which are soluble in the acidic agent, the alkali adding module 202 is used for alkali cleaning the MBR membrane module 101 and removing impurities, which are soluble in the alkaline agent, the liquid adding module 203 is used for water cleaning the MBR membrane module 101 and/or for diluting the acidic agent and/or the alkaline agent, in this embodiment, the citric acid that acid medicament adopted, the sodium hypochlorite that alkaline medicament adopted, add medicine subassembly 204 can be with the washing liquid from the front of membrane case 1 and/or inside the back pump income membrane case 1, wash the interior external surface of MBR membrane module 101, can make MBR membrane module 101 by thorough sanitization, after the cleaning operation, discharge the washing liquid through evacuation hole 104 the utility model discloses.

In this embodiment, the acid adding assembly 201 includes a first metering pump 2010, a liquid inlet end of the first metering pump 2010 is communicated with the inside of the first medicine storage box 2011 through a pipeline, and a liquid discharge end of the first metering pump 2010 is communicated with the inside of the cleaning bucket 205 through a first liquid discharge pipe 2012.

Specifically, first explosive box 2011 is used for storing acidic medicaments, add sour subassembly 201 and liquid feeding subassembly 203 and add medicine subassembly 204 and mutually support, provide power by first measuring pump 2010, pump the inside acidic medicament pump of first explosive box 2011 inside the wash tank 205, provide power by water pump 2030 again and draw the running water, pump the running water pump inside the wash tank 205 and dilute acidic medicaments, last pump the inside MBR 101 that washs of membrane case 1 inside with the acidic medicament pump after diluting by the power that washs pump 2040 provides power, clear up the impurity that MBR membrane module 101 surface can be dissolved in acidic medicaments, need not artifical washing, and labour saving and time saving improves the efficiency of wasing MBR membrane module 101.

In this embodiment, the alkali adding module 202 includes a second metering pump 2020, a liquid inlet end of the second metering pump 2020 is communicated with the inside of the second medicine storage tank 2021 through a pipe, and a liquid discharge end of the second metering pump 2020 is communicated with the inside of the washing tub 205 through a second liquid discharge pipe 2022.

Specifically, the second medicine storage tank 2021 is used for storing alkaline medicines, the alkaline adding assembly 202 is matched with the liquid adding assembly 203 and the medicine adding assembly 204, the second metering pump 2020 provides power, the alkaline medicines stored in the second medicine storage tank 2021 are pumped into the cleaning barrel 205, the water pump 2030 provides power to pump tap water, the tap water is pumped into the cleaning barrel 205 to dilute the alkaline medicines, and finally the cleaning pump 2040 provides power to pump the diluted alkaline medicines into the membrane tank 1 to clean the membrane module 101, so that impurities soluble in the alkaline medicines on the surface of the MBR membrane module 101 are cleaned, manual cleaning is not needed, time and labor are saved, and the efficiency of cleaning the MBR membrane module 101 is improved.

Further, a check valve is provided inside each of the first drain pipe 2012 and the second drain pipe 2022.

In this embodiment, the liquid feeding assembly 203 comprises a water pump 2030, a liquid inlet end of the water pump 2030 is communicated with one end of the first water inlet pipe, and a liquid discharge end of the water pump 2030 is communicated with the inside of the washing tub 205 through a pipe.

Specifically, the other end of first inlet tube and running water or pure water intercommunication provide power by water pump 2030, go into the cleaning barrel 205 inside with running water or pure water pump for wash cleaning barrel 205, dilute acid medicament, dilute alkaline medicament or wash MBR membrane module 101, in practical application, the bottom intercommunication of cleaning barrel 205 has drainage pipe, and one side of drainage pipe is provided with the drain valve, and after the operation completion of washing cleaning barrel 205, open the drain valve, will wash the inside liquid discharge of barrel 205 the utility model discloses.

In this embodiment, a medicine inlet 105 is formed at one side of the membrane box 1, and the medicine inlet 105 and the water inlet 102 are located at the same side of the membrane box 1.

Specifically, the medicine inlet 105 is located on the front surface of the membrane box 1, and the number of the medicine inlet 105 can be set according to actual conditions, so that the cleaning liquid can enter the interior of the membrane box 1 through the front surface of the membrane box 1 to clean the outer surface of the MBR membrane module 101.

In this embodiment, the water production assembly 103 comprises a water production pump 1030, the liquid inlet end of the water production pump 1030 is communicated with one end of a second water inlet pipe 1031, and the other end of the second water inlet pipe 1031 is communicated with the water production pipe inside the membrane tank 1.

Specifically, the one end that the second inlet tube 1031 kept away from the product water pump 1030 runs through the membrane frame intercommunication of membrane case 1 and MBR membrane module 101, and the inside of second inlet tube 1031 is provided with the check valve, according to the rivers direction of producing water, sets up the check valve in the rear end of the intercommunication department of second inlet tube 1031 and second washing branch pipe 2044, and the theory of operation of producing water subassembly 103 is: provide power by producing water pump 1030, will discharge through the biochemical pond source after MBR membrane module 101 filters the utility model discloses, in the in-service use, the drainage end intercommunication of producing water pump 1030 has flowing back pipeline, and flowing back pipeline's inside is provided with the manometer, and the manometer is used for monitoring the inside fluid pressure of flowing back pipeline.

In this embodiment, add medicine subassembly 204 includes cleaning pump 2040, cleaning pump 2040's the feed liquor end passes through the inside intercommunication of pipeline and washing bucket 205, cleaning pump 2040's flowing back end and the one end intercommunication of scavenge pipe 2041, the other end of scavenge pipe 2041 is provided with three solenoid valve 2042, three solenoid valve 2042's first branch mouth and the one end intercommunication of first washing branch pipe 2043, the other end and the medicine inlet 105 intercommunication of first washing branch pipe 2043, three solenoid valve 2042's the second branch mouth and the one end intercommunication of second washing branch pipe 2044, the other end and the one side intercommunication of second inlet tube 1031 of second washing branch pipe 2044.

Specifically, the working principle of the medicine adding assembly 204 is as follows: the cleaning pump 2040 provides power to pump cleaning solution inside the cleaning barrel 205 into the cleaning pipe 2041, and the three-way electromagnetic valve 2042 is controlled, so that when the cleaning pipe 2041 is communicated with the first cleaning branch pipe 2043, the cleaning solution inlet 105 enters the inside of the membrane box 1, and the MBR membrane assembly 101 is soaked and cleaned from the outer surface of the MBR membrane assembly 101, in the embodiment, the soaking time is 45min, impurities attached to the outer surface of the MBR membrane assembly 101 are dissolved, when the cleaning pipe 2041 is communicated with the second cleaning branch pipe 2044, the cleaning solution enters the inside of the membrane box 1 from the second water inlet pipe 1031, and the MBR membrane assembly 101 is soaked and cleaned from the inner surface of the MBR membrane assembly 101, and the soaking time is 45min, so that the MBR membrane assembly 101 is thoroughly cleaned.

Further, the first cleaning branch 2043 and the second cleaning branch 2044 are each provided with a check valve inside.

In this embodiment, still include aeration equipment 3, aeration equipment 3 includes aeration fan 301, aeration fan 301's exhaust end and the one end intercommunication of aeration pipe 302, and the other end of aeration pipe 302 extends to the inboard bottom of membrane case 1, and aeration pipe 302 extends to the one end of the inboard bottom of membrane case 1 and the inlet end intercommunication of aeration branch pipe 303, and aeration branch pipe 303 evenly distributed is in the bottom of membrane case 1, and the surface of aeration branch pipe 303 is seted up the exposure mouth of equidistance distribution.

Specifically, aeration component 3 is used for stirring the inside washing liquid of membrane case 1, and aeration component 3's theory of operation does: the aeration component 3 is started, the aeration fan 301 provides power, gas sequentially passes through the aeration pipe 302, the aeration branch pipe 303 and the aeration port to enter the interior of the membrane box 1, the upward moving gas directly sweeps membrane filaments, sludge accumulation nearby the MBR membrane component 101 is reduced, the surface of the MBR membrane component 101 is kept clean, the aeration component 3 can play a role in stirring cleaning liquid, the cleaning liquid is fully contacted with the MBR membrane component 101, and the MBR membrane component 101 is cleaned more thoroughly.

In the embodiment, the device further comprises a controller 4, and the controller 4 is respectively connected with the water production assembly 103, the acid adding assembly 201, the alkali adding assembly 202, the liquid adding assembly 203 and the medicine adding assembly 204 in communication.

Specifically, controller 4 adopts the PLC controller, the PLC controller with produce water pump 1030, first measuring pump 2010, second measuring pump 2020, water pump 2030, cleaning pump 2040, three-way solenoid valve 2042, aeration fan 301 and manometer communication connection, when the manometer monitored that the inside liquid pressure of drainage pipe is less than the default, the manometer was with signal transmission to the PLC controller, the PLC controller starts cleaning assembly 2 and washs MBR membrane module 101, the cleaning time, wash the order, the quantity and the concentration of washing liquid all can set up in advance, realize the technological effect of self-cleaning MBR membrane module 101.

In this embodiment, the evacuation hole 104 communicates with one end of a drain pipe, the other end of the drain pipe communicates with a temporary sewage storage tank, and a control valve is arranged on one side of the drain pipe.

Specifically, the control valve adopted in this embodiment is a manual valve, when the MBR membrane module 101 is cleaned, the control valve is closed, after the cleaning is completed, the control valve is opened, and the cleaning liquid is discharged into the temporary sewage storage tank through the emptying hole 104.

Specifically, the working principle of the automatic cleaning device of the MBR membrane bioreactor for sewage treatment is as follows: in use the utility model discloses the time, close the water intaking valve, start and produce water pump 1030, provide power by producing water pump 1030, take out the inside liquid of membrane case 1, controller control three way solenoid valve 2042, make scavenge pipe 2041 and first washing branch 2043 intercommunication, start water pump 2030 work, water pump 2030 is with running water pump income wash bucket 205 inside, start washing pump 2040, wash bucket 205 inside running water from advancing medicine mouth 105 pump income membrane case 1 of wash bucket 2040, soak and wash MBR 101, open the control valve, arrange the inside liquid of membrane case 1 into blowdown pond of keeping in, the washing operation is accomplished, start second measuring pump 2020, provide power by second measuring pump 2020, with the inside alkaline medicament pump who stores of second medicine storage case 2021 inside the washing bucket 205, provide power by water pump 2030 again and draw the running water, wash the inside alkaline medicament of bucket 205 of washing bucket of running water pump income, finally, provide power by washing pump 2040 with the alkaline medicament after diluting from advancing medicine mouth 105 pump income membrane case 1 inside soaking the alkaline medicament of diluting alkaline pump after diluting Cleaning the MBR membrane module 101 for 45min, soaking and cleaning impurities soluble in alkaline medicaments on the outer surface of the MBR membrane module 101, opening a control valve, discharging liquid in the membrane box 1 into a temporary sewage discharge storage tank, finishing the alkaline cleaning operation, starting a water pump 2030, pumping tap water into a cleaning barrel 205 in the cleaning barrel 205 by the water pump 2030, emptying the cleaning barrel 205, starting a first metering pump 2010, providing power by the first metering pump 2010, pumping the acidic medicaments stored in a first medicament storage tank 2011 into the medicament cleaning barrel 205, providing power by the water pump 2030 to pump the tap water, pumping the tap water into the cleaning barrel 205 to dilute the acidic medicaments, finally providing power by a cleaning pump 2040 to pump the diluted acidic medicaments into the membrane box 1 from a medicament inlet 105 to soak and clean the MBR membrane module 101 for 45min, and cleaning the impurities on the outer surface of the acidic medicaments on the outer surface of the MBR membrane module 101, opening a control valve to discharge liquid in the membrane box 1 into a blowdown temporary storage tank, completing acid washing operation, starting a water pump 2030, pumping tap water into the interior of a cleaning barrel 205 by the water pump 2030 to clean the cleaning barrel 205, emptying the cleaning barrel 205, controlling a three-way electromagnetic valve 2042 by a controller to enable a cleaning pipe 2041 to be communicated with a second cleaning branch pipe 2044, soaking and cleaning the MBR membrane assembly 101 from the inner surface of the MBR membrane assembly 101, starting the water pump 2030 to work, pumping the tap water into the interior of the cleaning barrel 205 by the water pump 2030, starting a cleaning pump 2040, pumping the tap water in the interior of the cleaning barrel 205 into the interior of the membrane box 1 from a second water inlet pipe 1031, soaking and cleaning the MBR membrane assembly 101, opening the control valve to discharge the liquid in the interior of the membrane box 1 into the blowdown temporary storage tank, completing water washing operation, starting a second metering pump 2020, providing power by a second metering pump 2020, pumping alkaline medicament stored in the interior of the second medicament storage tank 2021 into the interior of the metering pump 205, then the water pump 2030 supplies power to pump tap water, the tap water is pumped into the cleaning barrel 205 to dilute the alkaline medicament, finally the cleaning pump 2040 supplies power to pump the diluted alkaline medicament from the second water inlet pipe 1031 into the membrane box 1 to soak and clean the MBR membrane module 101 for 45min, impurities soluble in the alkaline medicament on the inner surface of the MBR membrane module 101 are soaked and cleaned, the control valve is opened, liquid in the membrane box 1 is discharged into a temporary sewage discharge storage tank, the alkaline cleaning operation is completed, the water pump 2030 is started, the tap water is pumped into the cleaning barrel 205 in the cleaning barrel 205 by the water pump 2030 to empty the cleaning barrel 205, the first metering pump 2010 is started, the first metering pump 2010 supplies power to pump the acidic medicament stored in the first medicine storage tank 2011 into the cleaning barrel 205, the tap water is pumped by the power supplied by the water pump 2030 to dilute the acidic medicament in the cleaning barrel 205, and finally, pumping the diluted acid medicament into the membrane box 1 from the second water inlet pipe 1031 by using a cleaning pump 2040 to soak and clean the MBR membrane assembly 101, wherein the soaking time is 45min, removing impurities which can be dissolved in the acid medicament on the inner surface of the MBR membrane assembly 101, opening a control valve, discharging the liquid in the membrane box 1 into a temporary sewage discharge tank, finishing the pickling operation, starting the aeration assembly 3 in the processes of water washing operation, alkali washing operation and pickling operation, wherein the aeration assembly 3 is used for stirring cleaning liquid, the aeration fan 301 provides power, the gas enters the membrane box 1 through the aeration pipe 302, the aeration branch pipe 303 and the aeration port in sequence, and the upward moving gas plays a role in stirring the cleaning liquid, so that the cleaning liquid can clean the MBR membrane assembly 101 more thoroughly.

It should be noted that the specific model specifications of the PLC controller, the water production pump 1030, the first metering pump 2010, the second metering pump 2020, the water pump 2030, the cleaning pump 2040, the three-way electromagnetic valve 2042, the aeration fan 301, and the pressure gauge need to be determined by type selection according to the actual specification of the apparatus, and the specific type selection calculation method adopts the prior art in the field, and therefore details are not described again.

The power supply and the principle of the PLC controller, the water production pump 1030, the first metering pump 2010, the second metering pump 2020, the water pump 2030, the cleaning pump 2040, the three-way solenoid valve 2042, the aeration fan 301, and the pressure gauge will be apparent to those skilled in the art, and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-cleaning device for an MBR membrane bioreactor for sewage treatment, characterized by comprising:

the membrane tank (1) is internally provided with an MBR (membrane bioreactor) membrane assembly (101), one side of the membrane tank (1) is provided with a water inlet (102), the other side of the membrane tank (1) is communicated with a water production assembly (103), and the bottom of the membrane tank (1) is provided with a drain hole (104);

wash subassembly (2), wash subassembly (2) including acidification subassembly (201), add alkali subassembly (202), liquid feeding subassembly (203), add medicine subassembly (204) and wash bucket (205), acidification subassembly (201) add alkali subassembly (202) liquid feeding subassembly (203) with add medicine subassembly (204) all with wash bucket (205) intercommunication, it keeps away from to add medicine subassembly (204) the one end of wasing bucket (205) with membrane case (1) intercommunication.

2. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 1, is characterized in that: the acid adding assembly (201) comprises a first metering pump (2010), a liquid inlet end of the first metering pump (2010) is communicated with the interior of a first medicine storage box (2011) through a pipeline, and a liquid discharging end of the first metering pump (2010) is communicated with the interior of the cleaning barrel (205) through a first liquid discharging pipe (2012).

3. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 1, is characterized in that: the alkali adding assembly (202) comprises a second metering pump (2020), a liquid inlet end of the second metering pump (2020) is communicated with the interior of a second medicine storage box (2021) through a pipeline, and a liquid discharge end of the second metering pump (2020) is communicated with the interior of the cleaning barrel (205) through a second liquid discharge pipe (2022).

4. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 1, is characterized in that: the liquid adding assembly (203) comprises a water pump (2030), a liquid inlet end of the water pump (2030) is communicated with one end of a first water inlet pipe, and a liquid discharging end of the water pump (2030) is communicated with the inside of the cleaning barrel (205) through a pipeline.

5. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 1, is characterized in that: a medicine inlet (105) is formed in one side of the membrane box (1), and the medicine inlet (105) and the water inlet (102) are located on the same side of the membrane box (1).

6. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 5, is characterized in that: produce water subassembly (103) including producing water pump (1030), the feed liquor end of producing water pump (1030) and the one end intercommunication of second inlet tube (1031), the other end of second inlet tube (1031) with the inside water pipe intercommunication of producing of membrane case (1).

7. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 6, is characterized in that: add medicine subassembly (204) including scavenging pump (2040), the feed liquor end of scavenging pump (2040) pass through the pipeline with the inside intercommunication of washing bucket (205), the flowing back end of scavenging pump (2040) and the one end intercommunication of scavenge pipe (2041), the other end of scavenge pipe (2041) is provided with three solenoid valve (2042), the first mouth that props up of three solenoid valve (2042) and the one end intercommunication of first washing branch pipe (2043), the other end of first washing branch pipe (2043) with advance medicine mouth (105) intercommunication, the second mouth that props up of three solenoid valve (2042) and the one end intercommunication of second washing branch pipe (2044), the other end of second washing branch pipe (2044) with the one side intercommunication of second inlet tube (1031).

8. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 1, is characterized in that: still include aeration components (3), aeration components (3) include aeration fan (301), the exhaust end of aeration fan (301) and the one end intercommunication of aeration pipe (302), the other end of aeration pipe (302) extends to the inboard bottom of membrane case (1), aeration pipe (302) extend to the one end of membrane case (1) inboard bottom communicates with the inlet end of aeration branch pipe (303), aeration branch pipe (303) evenly distributed in the bottom of membrane case (1), the aeration mouth of equidistance distribution is seted up on the surface of aeration branch pipe (303).

9. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment, according to claim 1, is characterized in that: the device is characterized by further comprising a controller (4), wherein the controller (4) is in communication connection with the water production assembly (103), the acid adding assembly (201), the alkali adding assembly (202), the liquid adding assembly (203) and the medicine adding assembly (204) respectively.

10. The automatic cleaning device of the MBR membrane bioreactor for sewage treatment as claimed in claim 1, wherein: the emptying hole (104) is communicated with one end of a sewage discharge pipe, the other end of the sewage discharge pipe is communicated with a temporary sewage discharge storage pool, and a control valve is arranged on one side of the sewage discharge pipe.