CN115532069A - Immersed ultrafiltration membrane off-line cleaning device - Google Patents
Immersed ultrafiltration membrane off-line cleaning device Download PDFInfo
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- CN115532069A CN115532069A CN202211013202.0A CN202211013202A CN115532069A CN 115532069 A CN115532069 A CN 115532069A CN 202211013202 A CN202211013202 A CN 202211013202A CN 115532069 A CN115532069 A CN 115532069A
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- cleaning
- valve
- water tank
- ultrafiltration membrane
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- 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
- C02F2303/16—Regeneration of sorbents, filters
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an immersed ultrafiltration membrane off-line cleaning device which comprises a cleaning water tank, a cleaning liquid supply system, a membrane wire rack and a forward cleaning water distribution pipeline, wherein the forward cleaning water distribution pipeline is arranged at the lower part of a top plate of the cleaning water tank and is connected with the cleaning liquid supply system through a forward cleaning feed valve, the membrane wire rack is arranged below the forward cleaning water distribution pipeline, the water distribution pipeline inside the membrane wire rack is connected with the cleaning liquid supply system through a backwashing feed valve, the cleaning water tank is provided with a cleaning liquid heating system and an aeration system, and the bottom of the cleaning water tank is connected with the cleaning liquid supply system through a water tank outlet valve. The cleaning solution heating system is used for heating the cleaning solution, the solubility of pollutants and reaction products is increased by improving the temperature of the cleaning solution, the water consumption, the medicine consumption and the consumption of compressed air are reduced, the cleaning cost is reduced, the cleaning effect is effectively improved, and the service life of the ultrafiltration membrane is prolonged.
Description
Technical Field
The invention relates to an immersed ultrafiltration membrane off-line cleaning device, which can reduce the cleaning cost, improve the cleaning effect and prolong the service life of an ultrafiltration membrane, and belongs to the technical field of water treatment.
Background
Some steel mills use an immersed ultrafiltration membrane as pretreatment equipment for advanced treatment of comprehensive wastewater, the immersed ultrafiltration membrane is an external pressure type hollow fiber component without a shell, water collecting pipes are arranged at two ends of the fiber, the component is directly put into treated water, and vacuum filtration is realized by a mode of sucking and permeating the water. The modules are connected together, mounted in a frame and placed in a membrane tank, the size of which depends on the throughput of the apparatus. When fouling occurs on ultrafiltration membranes, performance recovery is generally performed by on-line physical cleaning and chemical cleaning. Because the temperature of the cleaning liquid can not be accurately controlled in an online cleaning mode, the water consumption, the medicine consumption and the compressed air consumption are increased, the cleaning cost is greatly increased, the cleaning effect is gradually deteriorated along with the prolonging of the service life, and the service life of the ultrafiltration membrane is seriously influenced. Therefore, a new immersed ultrafiltration membrane cleaning mode is required.
Disclosure of Invention
The invention aims to provide an immersed ultrafiltration membrane off-line cleaning device aiming at the defects of the prior art so as to reduce the cleaning cost, improve the cleaning effect and prolong the service life of an ultrafiltration membrane.
In order to achieve the purpose, the invention adopts the following technical scheme:
the immersed ultrafiltration membrane off-line cleaning device comprises a cleaning water tank, a cleaning liquid supply system, a membrane wire rack and a forward cleaning water distribution pipeline, wherein the forward cleaning water distribution pipeline is installed on the lower portion of a top plate of the cleaning water tank and connected with the cleaning liquid supply system through a forward cleaning feed valve, the membrane wire rack is installed below the forward cleaning water distribution pipeline, the water distribution pipeline inside the membrane wire rack is connected with the cleaning liquid supply system through a backwashing feed valve, the cleaning water tank is provided with a cleaning liquid heating system and an aeration system, and the bottom of the cleaning water tank is connected with the cleaning liquid supply system through a water tank outlet valve.
According to the immersed ultrafiltration membrane off-line cleaning device, the cleaning liquid heating system comprises the steam valve and the steam pipe, the steam inlet end of the steam pipe is connected with the steam source through the steam valve, and the steam outlet end of the steam pipe is located in the cleaning liquid below the inner part of the cleaning water tank.
Above-mentioned submergence formula milipore filter off-line belt cleaning device, washing liquid heating system still includes washing liquid temperature measuring device, washing liquid temperature measuring device includes temperature probe and temperature display screen, temperature probe installs in washing water tank inside below, temperature display screen installs outside wasing the water tank, and temperature display screen's input passes through the cable and is connected with temperature probe's signal output part.
Above-mentioned submergence formula milipore filter off-line belt cleaning device, aeration system includes aeration valve and aeration pipe, the aeration pipe transversely installs in the washing liquid of the inside below of washing water tank, and the air jet on the aeration pipe faces up, and the air inlet passes through the aeration valve to be connected with high pressurized air source.
The cleaning liquid supply system comprises a cleaning water pump, a cleaning medicine box A and a cleaning medicine box B, a liquid inlet of the cleaning water pump is respectively connected with liquid outlets at the bottoms of the cleaning medicine box A, the cleaning medicine box B and the cleaning water tank through a medicine box A outlet valve, a medicine box B outlet valve and a water tank outlet valve, and a liquid outlet of the cleaning water pump is connected with a forward washing feed valve and a backwashing feed valve through a communicating valve.
According to the immersed ultrafiltration membrane off-line cleaning device, the cleaning liquid supply system further comprises a precision filter, a filter outlet valve and a filter inlet valve, a liquid inlet of the precision filter is connected with a liquid outlet of the cleaning water pump through the filter inlet valve, and a liquid outlet of the precision filter is connected with the forward washing feed valve and the backwashing feed valve through the filter outlet valve.
According to the immersed ultrafiltration membrane off-line cleaning device, a water pump inlet valve is arranged between the A medicine box outlet valve, the B medicine box outlet valve, the water tank outlet valve and the liquid inlet of the cleaning water pump, and a return valve is arranged between the liquid inlet end of the water pump inlet valve and the liquid outlet of the cleaning water pump.
Above-mentioned submergence formula milipore filter off-line belt cleaning device, the manometer is installed to the liquid outlet that washs the water pump.
In the immersed ultrafiltration membrane off-line cleaning device, the emptying valves are respectively installed at the bottoms of the precision filter, the cleaning medicine box A and the cleaning medicine box B.
In the immersed ultrafiltration membrane off-line cleaning device, the high-pressure air source is compressed air.
The cleaning solution heating system is used for heating the cleaning solution, and the solubility of pollutants and reaction products is increased by increasing the temperature of the cleaning solution, so that the water consumption, the medicine consumption and the consumption of compressed air can be reduced, the cleaning cost is reduced, the cleaning effect is effectively improved, and the service life of the ultrafiltration membrane is prolonged.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of the present invention.
The reference numbers in the figures are as follows: 1. a filter blow-down valve; 2. a precision filter; 3. a filter outlet valve; 4. a filter inlet valve; 5. cleaning the water pump; 6. a communication valve; 7. an inlet valve of the water pump; 8. a reflux valve; 9. a, a medicine box outlet valve; 10. a, cleaning a medicine box; 11. b, cleaning the medicine chest; 12. b, a medicine box outlet valve; 13. a tank outlet valve; 14. cleaning the water tank; 15. a membrane thread hanger; 16. backwashing the feed valve; 17. a forward wash feed valve; 18. a main wash water distribution pipeline; 19. a temperature probe; 20. a temperature display screen; 21. an aeration valve; 22. a steam valve; 23. a steam pipe; 24. an aeration pipe; 25. a tank drain valve; 26. a pressure gauge; 27. a, emptying a medicine box; 28. and B, a medicine chest emptying valve.
Detailed Description
Aiming at the problems of the traditional cleaning method, the invention provides the immersed ultrafiltration membrane off-line cleaning device which has the advantages of reasonable structure, convenience in use, safety, reliability and the like, can effectively reduce the cleaning cost, improve the cleaning effect and prolong the service life of the ultrafiltration membrane.
The present invention will be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views, and only the basic structure of the present invention is schematically illustrated, so that only the constitution related to the present invention is shown.
Referring to fig. 1, the invention mainly comprises a filter emptying valve 1, a precision filter 2, a filter outlet valve 3, a filter inlet valve 4, a cleaning water pump 5, a communication valve 6, a water pump inlet valve 7, a return valve 8, an a medicine box outlet valve 9, an a cleaning medicine box 10, a B cleaning medicine box 11, a B medicine box outlet valve 12, a water box outlet valve 13, a cleaning water box 14, a membrane wire hanger 15, a backwashing feed valve 16, a forward washing feed valve 17, a forward washing water distribution pipeline 18, a temperature probe 19, a temperature display screen 20, an aeration valve 21, a steam valve 22, a steam pipe 23, an aeration pipe 24, a water box discharge valve 25, a pressure gauge 26, an a medicine box emptying valve 27 and a B medicine box emptying valve 28.
The aeration valve 21 and the aeration pipe 24 form an aeration system, and the air inlet end of the aeration valve 21 is connected with a high-pressure air source.
The aeration pipe 24 is positioned in the cleaning liquid at the bottom of the cleaning water tank 14 and is connected with the air outlet end of the aeration valve 21 through a pipeline, and the aeration intensity during the cleaning of the ultrafiltration membrane can be controlled through the aeration valve 21. In the invention, a high-pressure air source adopts compressed air, and the air inlet end of the aeration valve 21 is connected with a main compressed air pipeline for production.
When the device is used, the cleaning flow, the cleaning time, the cleaning liquid temperature, the concentration of the cleaning agent (A cleaning agent and B cleaning agent) and the aeration intensity which cannot be achieved by online cleaning can be accurately controlled according to the pollution degree of the membrane element.
The cleaning flow rate is preferably a flow rate at which 2 to 4 times the membrane flux is normally operated. The cleaning time is preferably 100-120min, if the adhesive force of pollutants is strong, the cleaning effect can be further improved by adopting an intermittent aeration mode to strengthen air scrubbing during cleaning.
When in use, the temperature of the cleaning solution can be properly increased within the allowable use temperature range of the ultrafiltration membrane component, the solubility of pollutants and reaction products is increased, and the temperature of the cleaning solution is preferably 35-39 ℃.
When the cleaning agent is used, the concentration of the cleaning agent can be properly improved within the allowable use concentration range of the ultrafiltration membrane component, the permeability of the cleaning agent to the inside of a dirt layer is increased, the pH control range of the cleaning solution is preferably 2-13, and the concentration control range of the sodium hypochlorite cleaning solution is preferably 0.5% -0.8%.
The invention has the advantages and positive effects that: the immersed ultrafiltration membrane cleaning mode is changed from online cleaning to offline cleaning, the temperature of cleaning liquid is accurately controlled by adding a cleaning liquid heating system, the cleaning effect is integrally strengthened, the service life of the ultrafiltration membrane is prolonged, and the cleaning water consumption and the medicament consumption are reduced.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The immersed ultrafiltration membrane off-line cleaning device is characterized by comprising a cleaning water tank (14), a cleaning liquid supply system, a membrane wire hanger (15) and a forward cleaning water distribution pipeline (18), wherein the forward cleaning water distribution pipeline (18) is installed on the lower portion of a top plate of the cleaning water tank (14) and is connected with the cleaning liquid supply system through a forward cleaning feed valve (17), the membrane wire hanger (15) is installed below the forward cleaning water distribution pipeline (18), the water distribution pipeline inside the membrane wire hanger (15) is connected with the cleaning liquid supply system through a backwashing feed valve (16), the cleaning water tank (14) is provided with a cleaning liquid heating system and an aeration system, and the bottom of the cleaning water tank (14) is connected with the cleaning liquid supply system through a water tank outlet valve (13).
2. An immersed ultrafiltration membrane off-line cleaning device according to claim 1, wherein the cleaning solution heating system comprises a steam valve (22) and a steam pipe (23), the steam inlet end of the steam pipe (23) is connected with a steam source through the steam valve (22), and the steam outlet end is positioned in the cleaning solution below the inside of the cleaning water tank (14).
3. An immersed ultrafiltration membrane off-line cleaning device according to claim 2, wherein the cleaning solution heating system further comprises a cleaning solution temperature measuring device, the cleaning solution temperature measuring device comprises a temperature probe (19) and a temperature display screen (20), the temperature probe (19) is installed below the inside of the cleaning water tank (14), the temperature display screen (20) is installed outside the cleaning water tank (14), and the input end of the temperature display screen (20) is connected with the signal output end of the temperature probe (19) through a cable.
4. An immersed ultrafiltration membrane off-line cleaning device according to any one of claims 1 to 3, wherein the aeration system comprises an aeration valve (21) and an aeration pipe (24), the aeration pipe (24) is transversely arranged in the cleaning liquid below the inside of the cleaning water tank (14), an air outlet on the aeration pipe (24) faces upwards, and an air inlet is connected with a high-pressure air source through the aeration valve (21).
5. An immersed ultrafiltration membrane off-line cleaning device according to claim 4, wherein the cleaning liquid supply system comprises a cleaning water pump (5), an A cleaning medicine box (10) and a B cleaning medicine box (11), a liquid inlet of the cleaning water pump (5) is respectively connected with liquid outlets at the bottoms of the A cleaning medicine box (10), the B cleaning medicine box (11) and the cleaning water tank (14) through an A medicine box outlet valve (9), a B medicine box outlet valve (12) and a water tank outlet valve (13), and a liquid outlet of the cleaning water pump (5) is connected with a forward washing feed valve (17) and a backwashing feed valve (16) through a communicating valve (6).
6. An off-line cleaning device for an immersed ultrafiltration membrane according to claim 5, wherein the cleaning solution supply system further comprises a precision filter (2), a filter outlet valve (3) and a filter inlet valve (4), wherein a liquid inlet of the precision filter (2) is connected with a liquid outlet of a cleaning water pump (5) through the filter inlet valve (4), and a liquid outlet is connected with a forward washing feed valve (17) and a backwashing feed valve (16) through the filter outlet valve (3).
7. An immersed ultrafiltration membrane off-line cleaning device according to claim 6, wherein a water pump inlet valve (7) is arranged between the A medicine box outlet valve (9), the B medicine box outlet valve (12), the water box outlet valve (13) and a liquid inlet of the cleaning water pump (5), and a return valve (8) is arranged between a liquid inlet end of the water pump inlet valve (7) and a liquid outlet of the cleaning water pump (5).
8. The submerged ultrafiltration membrane off-line cleaning device as claimed in claim 7, characterized in that a pressure gauge (26) is installed at the liquid outlet of the cleaning water pump (5).
9. An immersed ultrafiltration membrane off-line cleaning device according to claim 8, wherein emptying valves are mounted at the bottoms of the precision filter (2), the cleaning agent box A (10) and the cleaning agent box B (11).
10. The submerged ultrafiltration membrane off-line cleaning device of claim 9, wherein the high pressure air source is compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013202.0A CN115532069A (en) | 2022-08-23 | 2022-08-23 | Immersed ultrafiltration membrane off-line cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013202.0A CN115532069A (en) | 2022-08-23 | 2022-08-23 | Immersed ultrafiltration membrane off-line cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115532069A true CN115532069A (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211013202.0A Pending CN115532069A (en) | 2022-08-23 | 2022-08-23 | Immersed ultrafiltration membrane off-line cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115532069A (en) |
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2022
- 2022-08-23 CN CN202211013202.0A patent/CN115532069A/en active Pending
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