CN112619429A - Online cleaning method for lining membrane in membrane pool - Google Patents
Online cleaning method for lining membrane in membrane pool Download PDFInfo
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- CN112619429A CN112619429A CN202011511625.6A CN202011511625A CN112619429A CN 112619429 A CN112619429 A CN 112619429A CN 202011511625 A CN202011511625 A CN 202011511625A CN 112619429 A CN112619429 A CN 112619429A
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- membrane
- cleaning
- cleaning device
- pool
- liquid medicine
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- 239000012528 membrane Substances 0.000 title claims abstract description 134
- 238000004140 cleaning Methods 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 239000010802 sludge Substances 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims abstract description 7
- 238000011010 flushing procedure Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000003814 drug Substances 0.000 claims description 32
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 23
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 19
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000011001 backwashing Methods 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/022—Membrane sterilisation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses an online cleaning method for a lining membrane in a membrane pool, which is characterized by comprising the following steps: (1) cleaning by a high-pressure cleaning device: the sewage in the membrane pool is drained, the die carrier does not need to be lifted out, the detachable high-pressure cleaning device is sequentially inserted between the two membranes, the detachable high-pressure cleaning device stretches across the die carrier and is held by the die carrier, then the suction flushing liquid washes the adjacent membranes, and after all the membranes are washed, the high-pressure cleaning device is detached and the washed sludge and impurities are drained.
Description
Technical Field
The invention relates to a membrane tank cleaning method, in particular to an online cleaning method for a lining membrane in a membrane tank.
Background
With the development of environmental protection technology, Membrane Bioreactor (MBR) technology has been widely applied in the technical field of sewage treatment. The inner lining membrane is used as an important component of an MBR process and carries important missions of sludge concentration, organic matter bacteria interception and solid-liquid separation. However, in the operation process of the membrane pool for treating sewage, the flux of the lining membrane is easy to be quickly attenuated due to easy pollution and blockage, so the flux and the service life of the membrane are determined by the cleaning effect of the lining membrane. At present, the cleaning method of the lining membrane in the membrane pool comprises an online cleaning method and an offline cleaning method. The online cleaning method has the advantages of large dosage, long cleaning time and poor cleaning effect; off-line cleaning, hoisting, high labor intensity, long cleaning period and the like, and restricts the stable operation of the MBR process.
Disclosure of Invention
The invention aims to solve the technical problem of providing an online cleaning method for a lining membrane in a membrane tank, which adopts the technical scheme that: an online cleaning method for a lining membrane in a membrane pool is characterized by comprising the following steps:
(1) cleaning by a high-pressure cleaning device: the sewage in the membrane pool is drained, the die carrier does not need to be lifted out, the detachable high-pressure cleaning device is sequentially inserted between the two membranes, the detachable high-pressure cleaning device stretches across the die carrier and is held by the die carrier, then the suction flushing liquid washes the adjacent membranes, and after all the membranes are washed, the high-pressure cleaning device is detached and the washed sludge and impurities are drained.
The invention is further characterized in that:
and (2) controlling the online cleaning frequency of the lining membrane in the membrane pool to be 7-30 days from the start of the operation of the membrane pool, and cleaning the high-pressure cleaning device for 3-5 times in the step (1).
Controlling the online cleaning frequency of the lining membrane in the membrane tank to be 7-30 days, cleaning the lining membrane in the membrane tank for 3-5 times by adding mixed sodium hypochlorite in the self-made high-pressure cleaning device, and adding step (2) mixed sodium hypochlorite to clean the lining membrane in the membrane tank after the self-made high-pressure cleaning device in step (1) is cleaned, wherein the step (2) mixed sodium hypochlorite is cleaned as follows: the height of a film frame is 2/3 injected into the empty film poolPreparing 2 1000L dosing tanks in the clear water on site, respectively adding 10% -12% NaClO solution and 5% -10% NaOH solution, respectively pumping the solutions into a pipeline mixer through a metering pump, pumping the clear water through a backwashing pump, mixing the solutions through the pipeline mixer to prepare a mixed solution with the effective chlorine concentration of 50-500 ppm and the PH of 8-10, backwashing the membrane inlet filaments, and mixing the liquid medicine at 1-5L/m2Backwashing the membrane inlet filaments between 0.5 and 1 hour (liquid medicine volume/effective membrane area), just soaking the whole membrane frame with the liquid medicine, and keeping the concentration of the liquid medicine on the surface of the membrane filaments for 0.5 to 1 hour; aerating for 0.5-1 hour and then emptying the liquid medicine.
Under the precondition that the online cleaning frequency of the lining membrane in the membrane tank is controlled to be 7-30 days, after the self-made high-pressure cleaning device in the step (1) is cleaned and the mixed sodium hypochlorite in the step (2) is cleaned for 3-5 times, the online cleaning of the lining membrane in the membrane tank is required to pump clean water and clean sodium hypochlorite mixed liquid into a backwashing pump after the self-made high-pressure cleaning device in the step (1) is cleaned and the mixed sodium hypochlorite in the step (2) is cleaned, and the mixture is emptied, then the step (3) is added for acid cleaning, and the step (3) is as follows: 2/3 membrane frame height clear water is injected into an empty membrane pool, 1 1000L dosing tank is prepared on site, 5% -20% citric acid solution is added into the tank, the tank is pumped into a pipeline mixer by a metering pump, clear water is pumped by a backwashing pump and is mixed by the pipeline mixer to prepare 0.5% -2% citric acid solution, membrane yarns are backwashed, and the liquid medicine is 1-5L/m2Backwashing the membrane inlet filaments between 0.5 and 1 hour (liquid medicine volume/effective membrane area), just soaking the whole membrane frame with the liquid medicine, and keeping the concentration of the liquid medicine on the surface of the membrane filaments for 0.5 to 1 hour; aerating for 0.5-1 hour to empty the liquid medicine.
The detachable high-pressure cleaning device comprises a high-pressure pump, N groups of nozzle pipes connected with the high-pressure pump through hoses, and a connecting frame connected with the N groups of nozzle pipes, wherein N is a natural number greater than or equal to 1.
The invention has the beneficial effects that:
the invention relates to an online cleaning method of a lining membrane in a membrane pool, which is formulated according to the service cycle of the membrane pool, and adopts a mode of cleaning by a high-pressure cleaning device or the combination of the cleaning by the high-pressure cleaning device and chemical cleaning, thereby reducing the dosage of chemical cleaning drugs in online cleaning, having good cleaning effect, short time consumption in the cleaning process and low labor intensity.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a detachable high-pressure cleaning device according to the present invention.
Detailed Description
The invention is explained in more detail below with reference to the drawings.
Example one
An on-line cleaning method for a lining film in a membrane pool comprises the following steps:
(1) cleaning by a high-pressure cleaning device: the sewage in the membrane pool is drained, the die carrier does not need to be lifted out, the detachable high-pressure cleaning device is sequentially inserted between the two membranes, the detachable high-pressure cleaning device stretches across the die carrier and is held by the die carrier, then the suction flushing liquid washes the adjacent membranes, and after all the membranes are washed, the high-pressure cleaning device is detached and the washed sludge and impurities are drained.
And (2) controlling the online cleaning frequency of the lining membrane in the membrane pool to be 7-30 days from the start of the operation of the membrane pool, and cleaning the high-pressure cleaning device for 3-5 times in the step (1).
Example two
An on-line cleaning method for a lining film in a membrane pool comprises the following steps:
(1) cleaning by a high-pressure cleaning device: the sewage in the membrane pool is drained, the die carrier does not need to be lifted out, the detachable high-pressure cleaning device is sequentially inserted between the two membranes, the detachable high-pressure cleaning device stretches across the die carrier and is held by the die carrier, then the suction flushing liquid washes the adjacent membranes, and after all the membranes are washed, the high-pressure cleaning device is detached and the washed sludge and impurities are drained.
Controlling the online cleaning frequency of the lining membrane in the membrane tank to be 7-30 days, cleaning the lining membrane in the membrane tank for 3-5 times by adding mixed sodium hypochlorite in the self-made high-pressure cleaning device, and adding step (2) mixed sodium hypochlorite to clean the lining membrane in the membrane tank after the self-made high-pressure cleaning device in step (1) is cleaned, wherein the step (2) mixed sodium hypochlorite is cleaned as follows: clear water with the height of 2/3 membrane racks is injected into the empty membrane pool, 2 1000L dosing boxes are equipped on site, and 10% -12% NaClO solution and NaClO solution are respectively added into the boxesPumping 5% -10% NaOH solution into a pipeline mixer through a metering pump respectively, pumping clear water through a backwash pump, mixing through the pipeline mixer to prepare mixed liquid with the effective chlorine concentration of 50-500 ppm and the PH of 8-10, backwashing the membrane inlet filaments, and enabling the liquid medicine to be 1-5L/m2Backwashing the membrane inlet filaments between 0.5 and 1 hour (liquid medicine volume/effective membrane area), just soaking the whole membrane frame with the liquid medicine, and keeping the concentration of the liquid medicine on the surface of the membrane filaments for 0.5 to 1 hour; aerating for 0.5-1 hour and then emptying the liquid medicine.
EXAMPLE III
Under the precondition that the online cleaning frequency of the lining membrane in the membrane tank is controlled to be 7-30 days, after the self-made high-pressure cleaning device in the step (1) is cleaned and the mixed sodium hypochlorite in the step (2) is cleaned for 3-5 times, the online cleaning of the lining membrane in the membrane tank is required to pump clean water and clean sodium hypochlorite mixed liquid into a backwashing pump after the self-made high-pressure cleaning device in the step (1) is cleaned and the mixed sodium hypochlorite in the step (2) is cleaned, and the mixture is emptied, then the step (3) is added for acid cleaning, and the step (3) is as follows: 2/3 membrane frame height clear water is injected into an empty membrane pool, 1 1000L dosing tank is prepared on site, 5% -20% citric acid solution is added into the tank, the tank is pumped into a pipeline mixer by a metering pump, clear water is pumped by a backwashing pump and is mixed by the pipeline mixer to prepare 0.5% -2% citric acid solution, membrane yarns are backwashed, and the liquid medicine is 1-5L/m2Backwashing the membrane inlet filaments between 0.5 and 1 hour (liquid medicine volume/effective membrane area), just soaking the whole membrane frame with the liquid medicine, and keeping the concentration of the liquid medicine on the surface of the membrane filaments for 0.5 to 1 hour; aerating for 0.5-1 hour to empty the liquid medicine.
Detachable high pressure cleaning device is as shown in fig. 1, including high- pressure pump 1, 3 groups of nozzle pipe 3 that pass through hose 2 with high-pressure pump 1 and connect 4 link 4 of group's spray tube 3, in practical application, the nozzle on the nozzle pipe 3 is adjusted into the spray form, and nozzle pipe 3 from last down inserts between 2 diaphragms 5, and link 4 spanes and is held by die carrier 6 on die carrier 6, opens high-pressure pump 1, and the washing liquid that the suction was prepared washes. Certainly, 1 group of the nozzle pipes 3 can be adopted, sludge between 2 membranes after being washed is taken out and placed between the other 2 adjacent membranes until the washing is finished; it is also possible to use 3 or 5 groups, where the flushing liquid can be clear water, if the sludge is heavy, it can be easily flushed with surfactant-like substances, such as: washing powder, detergent, etc., and may also contain bactericide, such as: sodium hypochlorite, sodium bisulfite, sodium hydroxide, and the like.
The invention relates to an online cleaning method of a lining membrane in a membrane pool, which is formulated according to the service cycle of the membrane pool, and adopts a mode of cleaning by a high-pressure cleaning device or the combination of the cleaning by the high-pressure cleaning device and chemical cleaning, thereby reducing the dosage of chemical cleaning drugs in online cleaning, having good cleaning effect, short time consumption in the cleaning process and low labor intensity.
While the invention has been described with respect to the foregoing technical disclosure and features, it will be understood that various changes and modifications in the above structure, including combinations of features disclosed herein either individually or in any combination as is evident to one skilled in the art, may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. An online cleaning method for a lining membrane in a membrane pool is characterized by comprising the following steps:
(1) cleaning by a high-pressure cleaning device: the sewage in the membrane pool is drained, the die carrier does not need to be lifted out, the detachable high-pressure cleaning device is sequentially inserted between the two membranes, the detachable high-pressure cleaning device stretches across the die carrier and is held by the die carrier, then the suction flushing liquid washes the adjacent membranes, and after all the membranes are washed, the high-pressure cleaning device is detached and the washed sludge and impurities are drained.
2. The method for cleaning the membrane lining film in the membrane pool according to claim 1, wherein the high-pressure cleaning device in the step (1) is cleaned for 3-5 times under the precondition that the online cleaning frequency of the membrane lining film in the membrane pool is controlled to be 7-30 days from the start of the operation of the membrane pool.
3. The method for cleaning the membrane inside the membrane tank in an on-line way as claimed in claim 2, wherein the membrane inside the membrane tank is cleaned in the membrane tankThe online cleaning frequency of the lining film is controlled under the premise of 7-30 days, after the self-made high-pressure cleaning device cleans and mixes sodium hypochlorite to clean for 3-5 times, the online cleaning of the lining film in the film pool needs to add step (2) to mix sodium hypochlorite cleaning after step (1) high-pressure cleaning device cleans, and step (2) mixes sodium hypochlorite cleaning and is: filling clear water with the height of 2/3 membrane frames into an empty membrane pool, preparing 2 1000L dosing boxes on site, respectively adding 10% -12% NaClO solution and 5% -10% NaOH solution, respectively pumping the solutions into a pipeline mixer by a metering pump, pumping clear water by a backwashing pump, mixing the clear water by the pipeline mixer to prepare mixed liquid with the effective chlorine concentration of 50-500 ppm and the PH of 8-10, backwashing the membrane inlet filaments, and using 1-5L/m of liquid medicine2Backwashing the membrane inlet filaments between 0.5 and 1 hour (liquid medicine volume/effective membrane area), just soaking the whole membrane frame with the liquid medicine, and keeping the concentration of the liquid medicine on the surface of the membrane filaments for 0.5 to 1 hour; aerating for 0.5-1 hour and then emptying the liquid medicine.
4. The method for cleaning the membrane inside pool liner membrane on line as claimed in claim 3, characterized in that under the premise that the online cleaning frequency of the membrane inside pool liner membrane is controlled to be 7 to 30 days, after the step (1) of cleaning the high pressure cleaning device and the step (2) of cleaning with sodium hypochlorite by mixing for 3 to 5 times, the step (3) of acid cleaning is added after the step (1) of cleaning the high pressure cleaning device and the step (2) of cleaning with sodium hypochlorite by pumping clean water into a backwash pump to flush the mixture of sodium hypochlorite and exhaust the mixture, and the step (3) of acid cleaning is carried out: 2/3 membrane frame height clear water is injected into an empty membrane pool, 1 1000L dosing tank is prepared on site, 5% -20% citric acid solution is added into the tank, the tank is pumped into a pipeline mixer by a metering pump, clear water is pumped by a backwashing pump and is mixed by the pipeline mixer to prepare 0.5% -2% citric acid solution, membrane yarns are backwashed, and the liquid medicine is 1-5L/m2Backwashing the membrane inlet filaments between 0.5 and 1 hour (liquid medicine volume/effective membrane area), just soaking the whole membrane frame with the liquid medicine, and keeping the concentration of the liquid medicine on the surface of the membrane filaments for 0.5 to 1 hour; aerating for 0.5-1 hour to empty the liquid medicine.
5. The in-line cleaning method for membrane-tank-lined membranes according to claim 1 or claim 2 or claim 3 or claim 4, characterized in that: the detachable high-pressure cleaning device comprises a high-pressure pump, N groups of nozzle pipes connected with the high-pressure pump through hoses, and a connecting frame connected with the N groups of nozzle pipes, wherein N is a natural number greater than or equal to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011511625.6A CN112619429A (en) | 2020-12-18 | 2020-12-18 | Online cleaning method for lining membrane in membrane pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011511625.6A CN112619429A (en) | 2020-12-18 | 2020-12-18 | Online cleaning method for lining membrane in membrane pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112619429A true CN112619429A (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011511625.6A Pending CN112619429A (en) | 2020-12-18 | 2020-12-18 | Online cleaning method for lining membrane in membrane pool |
Country Status (1)
| Country | Link |
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| CN (1) | CN112619429A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207079035U (en) * | 2017-06-27 | 2018-03-09 | 天津海派特环保科技有限公司 | A kind of immersion ultrafiltration apparatus |
| CN108249560A (en) * | 2018-02-10 | 2018-07-06 | 西安建筑科技大学 | A kind of membrane bioreactor and membrane pollution of membrane bioreactor control device, method |
-
2020
- 2020-12-18 CN CN202011511625.6A patent/CN112619429A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207079035U (en) * | 2017-06-27 | 2018-03-09 | 天津海派特环保科技有限公司 | A kind of immersion ultrafiltration apparatus |
| CN108249560A (en) * | 2018-02-10 | 2018-07-06 | 西安建筑科技大学 | A kind of membrane bioreactor and membrane pollution of membrane bioreactor control device, method |
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Application publication date: 20210409 |
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