CN217511590U - Cleaning system of milipore filter - Google Patents
Cleaning system of milipore filter Download PDFInfo
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- CN217511590U CN217511590U CN202221386616.3U CN202221386616U CN217511590U CN 217511590 U CN217511590 U CN 217511590U CN 202221386616 U CN202221386616 U CN 202221386616U CN 217511590 U CN217511590 U CN 217511590U
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Abstract
The utility model belongs to the technical field of the milipore filter washs, a cleaning system of milipore filter is disclosed. The system comprises a raw water tank, an ultrafiltration water inlet pump, a self-cleaning filter, ultrafiltration equipment, a water production tank, a tail gas destruction device, a backwashing water pump, an air compressor subsystem, an ozone generator subsystem and an optional chemical adding and cleaning subsystem. Utilize the utility model discloses a system of ozone preoxidation in coordination can prolong the life of its milipore filter, improve the cleaning performance and reduced the influence to the online rate of membrane operation.
Description
Technical Field
The utility model belongs to the technical field of the milipore filter washs, more specifically relates to a cleaning system of milipore filter.
Background
The membrane pollution refers to the irreversible change phenomenon of permeation flow and separation characteristics of the membrane caused by the reduction or blockage of the membrane pore diameter caused by adsorption and deposition on the membrane surface or in the membrane pores due to the physical-chemical interaction or mechanical action between particles, colloidal particles or solute macromolecules in water and the membrane in the membrane filtration process. In the field of water treatment, the ultrafiltration membrane is inevitably polluted in normal operation, which is an insurmountable problem for restricting normal water production of the membrane.
At present, physical cleaning and chemical cleaning are commonly used for preventing and treating membrane pollution, various physical cleaning methods such as forward cleaning, reverse cleaning, permeate liquid back pressure cleaning, vibration, water conservancy methods and the like recover certain permeability through cleaning the membrane, but the physical cleaning cannot completely recover the water permeability, and chemical cleaning is also needed. Chemical cleaning is the removal of contaminants from membranes by the reaction of chemical agents with deposits, dirt, corrosion products and other contaminants that affect flux rates and water quality. The method comprises the steps of soaking the membrane in a chemical cleaning solution for a certain time to loosen, decompose and precipitate pollutants on the surface of the membrane.
The common method for preventing and treating the pollution of the ultrafiltration membrane has the following problems:
(1) effect of cleaning on membrane material: the prior organic ultrafiltration membrane material applied to the field of water treatment mainly adopts PVDF material, and the manufacturing process is divided into a solution phase transfer method (NIPS) and a thermal phase separation method (TIPS). The NIPS membrane has the defects of relatively poor chemical stability, low mechanical strength and the like, while the TIPS membrane has the problems of relatively poor chemical stability and relatively poor hydrophilicity although the mechanical strength of the TIPS membrane is improved to a certain extent compared with the NIPS membrane. Due to the above factors, the PVDF membrane is easy to have the conditions of filtration performance reduction or filament breakage and the like caused by membrane corrosion in a conventional membrane cleaning mode, so that the whole service life of the membrane is reduced.
(2) Incomplete cleaning: whether physical cleaning or chemical cleaning is adopted, basically, after membrane pollution reaches a certain degree, recovery cleaning is carried out, and with the increase of service life, the operation water production performance of the ultrafiltration membrane is reduced year by year, which also indicates that the conventional physical or chemical cleaning cannot completely remove the pollution on the membrane, and the condition of incomplete cleaning exists.
(3) The cleaning causes the ultrafiltration membrane to have low online running rate: during the operation of the ultrafiltration system, after water is continuously produced for a period of time, backwashing or chemical cleaning is needed to ensure that the water production flux of the membrane is maintained within the design range, and frequent backwashing or chemical cleaning can reduce the water production time of the membrane system and reduce the overall on-line rate of the membrane system.
Therefore, a new ultrafiltration membrane cleaning system is urgently needed to be provided for solving the problems of incomplete cleaning, influence on the online rate of membrane operation and even reduction of the service life of the membrane in the conventional ultrafiltration membrane cleaning technology.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cleaning system of milipore filter to prior art not enough. Utilize the utility model discloses a system of ozone preoxidation in coordination can prolong the life of its milipore filter, improve the cleaning performance and reduced the influence to the online rate of membrane operation.
In order to achieve the above object, the present invention provides a system for cleaning ultrafiltration membranes, which comprises a raw water tank, an ultrafiltration water inlet pump, a self-cleaning filter, an ultrafiltration apparatus, a water production tank, a tail gas destruction device, a backwashing water pump, an air compressor subsystem and an ozone generator subsystem, and optionally a chemical dosing cleaning subsystem;
the water outlet of the raw water tank, the ultrafiltration water inlet pump, the self-cleaning filter, the ultrafiltration equipment and the water inlet of the water production tank are communicated in sequence; the tail gas destruction device is arranged at the top of the water production tank and used for recovering ozone entering the water production tank;
the top water production outlet of the ultrafiltration equipment is also communicated with the product water outlet of the water production tank through a back flush water pump; the air compressor subsystem is communicated with a bottom air inlet of the ultrafiltration device;
the ozone generator subsystem comprises a mixer and an ozone generator;
the mixer is arranged between the water outlet of the ultrafiltration water inlet pump and the water inlet of the self-cleaning filter, and the ozone generator is communicated with the mixer; a dosing output pipeline of the dosing cleaning subsystem is communicated with a pipeline between the water outlet of the self-cleaning filter and the bottom water inlet of the ultrafiltration device;
or the mixer is arranged between the water outlet of the backwashing water pump and the top water production outlet of the ultrafiltration equipment, and the ozone generator is communicated with the product water inlet of the mixer; a dosing output pipeline of the dosing cleaning subsystem is communicated with a pipeline between the water outlet of the self-cleaning filter and the bottom water inlet of the ultrafiltration device;
and a liquid level meter is arranged in the raw water tank.
Preferably, the raw water tank is further provided with a backwash water inlet and a raw water inlet.
Preferably, the ultrafiltration device is further provided with a top backwash water outlet.
Preferably, the top backwash water outlet of the ultrafiltration device is communicated with the backwash water inlet of the raw water tank.
Preferably, the dosing and cleaning subsystem comprises a drug dosing tank, a drug dosing pump, an acid dosing tank, an acid dosing pump and the dosing output pipeline.
Preferably, the medicament dosing box is communicated with a medicament inlet end of the medicament dosing pump; the acid agent feeding box is communicated with the feeding end of the acid agent feeding pump.
Preferably, the drug outlet end of the drug dosing pump and the drug outlet end of the acid dosing pump are both communicated with the drug output pipeline.
Preferably, the agent is sodium hypochlorite or sodium hydroxide.
Preferably, the acid agent is citric acid, oxalic acid or hydrochloric acid.
The technical scheme of the utility model beneficial effect is:
(1) the system for treating the ultrafiltration membrane by using the ozone can reduce irreversible damage to the ultrafiltration membrane and keep the service life of the ultrafiltration membrane. The system is more suitable for treating the ultrafiltration membrane resistant to ozone oxidation, and the membrane has higher chemical stability and mechanical strength compared with the conventional ultrafiltration membrane, and can effectively resist corrosion of membrane cleaning agents such as high-concentration ozone, sodium hypochlorite and the like, so that the system and the method disclosed by the invention have the advantages of less irreversible damage to the membrane, more thorough cleaning and reduction of influence on the online rate of membrane operation.
(2) The utility model provides a high-efficient, stable system of getting rid of on line has reduced the content of membrane system play water organic matter, has reduced the operation transmembrane pressure difference of milipore filter, has improved membrane system rate of permeating water to reach and reduce back flush and chemical cleaning frequency, improve the whole purpose of the online rate of membrane system.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings, wherein like reference numerals generally represent like parts throughout the exemplary embodiments.
Fig. 1 shows a schematic diagram of a cleaning system for an ultrafiltration membrane provided in embodiment 1 of the present invention.
Fig. 2 shows a schematic diagram of a cleaning system for an ultrafiltration membrane provided in embodiment 2 of the present invention.
Fig. 3 is a graph showing changes in operational data of a membrane system treated by a method for cleaning an ultrafiltration membrane according to embodiment 4 of the present invention.
Fig. 4 shows a change chart of membrane system operation data processed by the cleaning method for the ultrafiltration membrane provided by the comparative example 1 of the present invention.
The reference numerals are explained below:
1. a raw water tank; 2. an ultrafiltration water intake pump; 3. a self-cleaning filter; 4. a mixer; 5. ultrafiltration equipment; 6. a water production tank; 7. backwashing the water pump; 8. a medicament dosing tank; 9. a medicament dosing pump; 10. an acid agent dosing box; 11. an acid dosing pump; 12. an air compressor subsystem; 13. an ozone generator; 14. a tail gas destruction device; 15. a dosing output line; 16. a backwash water inlet; 17. a raw water inlet; 18. a top backwashing water outlet, 19 and a top produced water outlet.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a system for cleaning an ultrafiltration membrane, which comprises a raw water tank, an ultrafiltration water inlet pump, a self-cleaning filter, an ultrafiltration device, a water production tank, a tail gas destruction device, a backwashing water pump, an air compressor subsystem and an ozone generator subsystem, and optionally a chemical adding and cleaning subsystem;
the water outlet of the raw water tank, the ultrafiltration water inlet pump, the self-cleaning filter, the ultrafiltration equipment and the water inlet of the water production tank are communicated in sequence; the tail gas destruction device is arranged at the top of the water production tank and used for recovering ozone entering the water production tank;
the top water production outlet of the ultrafiltration equipment is also communicated with the product water outlet of the water production tank through a back flush water pump; the air compressor subsystem is communicated with a bottom air inlet of the ultrafiltration device;
the ozone generator subsystem comprises a mixer and an ozone generator;
the mixer is arranged between the water outlet of the ultrafiltration water inlet pump and the water inlet of the self-cleaning filter, and the ozone generator is communicated with the mixer; a dosing output pipeline of the dosing cleaning subsystem is communicated with a pipeline between the water outlet of the self-cleaning filter and the bottom water inlet of the ultrafiltration device;
or the mixer is arranged between the water outlet of the backwashing water pump and the top water outlet of the ultrafiltration equipment, and the ozone generator is communicated with the product water inlet of the mixer; a dosing output pipeline of the dosing cleaning subsystem is communicated with a pipeline between the water outlet of the self-cleaning filter and the bottom water inlet of the ultrafiltration device;
and a liquid level meter is arranged in the raw water tank.
In one example, the raw water tank is further provided with a backwash water inlet and a raw water inlet.
In one example, the ultrafiltration device is further provided with a top backwash water outlet.
In one example, a top backwash water outlet of the ultrafiltration device communicates with a backwash water inlet of the raw water tank.
In one example, the dosing purge subsystem includes a drug dosing tank, a drug dosing pump, an acid dosing tank, an acid dosing pump, and the dosing output line.
In one example, the medicament dosing chamber is in communication with a feed end of the medicament dosing pump; the acid agent feeding box is communicated with the feeding end of the acid agent feeding pump.
In one example, the drug outlet end of the drug dosing pump and the drug outlet end of the acid dosing pump are both in communication with the drug output line.
In the present invention, as a preferred embodiment, the present invention preferably uses an ultrafiltration membrane resistant to ozone oxidation, which is known to those skilled in the art.
In one example, the agent is sodium hypochlorite or sodium hydroxide.
In one example, the acidic agent is citric acid, oxalic acid, or hydrochloric acid.
The utility model also provides a cleaning method of milipore filter, this method adopts the system, including following step:
s1: conveying the raw water in the raw water tank and ozone to the mixer and the self-cleaning filter together to oxidize and decompose pollutants in the raw water;
s2: conveying the raw water subjected to oxidative decomposition to the ultrafiltration equipment for filtration, then conveying the raw water into the water production tank as product water, and simultaneously recovering and decomposing the ozone entering the water production tank through the tail gas destruction device and then discharging the ozone out of the system;
s3: and conveying the product water in the water production tank to a top water production outlet of the ultrafiltration equipment by using the back-flushing water pump, reversely back-flushing the membrane wires in the ultrafiltration equipment, and simultaneously performing air oscillation and air bubble scrubbing on the membrane wires in the ultrafiltration equipment by using the air compressor subsystem.
In one example, in step S1, the adding concentration of the ozone is 6-40 mg/L.
In one example, the step S3 further includes: and the medicament and/or the acid agent are sent to a water inlet at the bottom of the ultrafiltration equipment through the medicament feeding pump and/or the acid agent feeding pump of the medicament feeding and cleaning subsystem according to the condition of membrane pollution.
The utility model also provides a cleaning method of milipore filter, this method adopts the system, including following step:
s1: conveying raw water in the raw water tank to the self-cleaning filter, and performing primary filtration treatment on the raw water;
s2: conveying the raw water subjected to the primary filtration treatment to the ultrafiltration equipment for secondary filtration treatment, and then conveying the raw water into the water production tank to be used as product water;
s3: conveying the product water in the water production tank and the ozone to the mixer and a top water production outlet of the ultrafiltration equipment by using the backwashing water pump, reversely carrying out oxidation backwashing on membrane wires in the ultrafiltration equipment, and simultaneously carrying out air oscillation and bubble scrubbing on the membrane wires in the ultrafiltration equipment by using the air compressor subsystem; and the ozone entering the water production tank is recycled and decomposed by the tail gas destruction device and then discharged out of the system.
In one example of the use of a magnetic resonance imaging system,
in step S3, the adding concentration of the ozone is 6-40 mg/L;
the step S3 further includes: and the medicament and/or the acid agent are sent to a water inlet at the bottom of the ultrafiltration equipment through the medicament feeding pump and/or the acid agent feeding pump of the medicament feeding and cleaning subsystem according to the condition of membrane pollution.
Example 1
The present embodiment provides a system for cleaning an ultrafiltration membrane, as shown in fig. 1, the system includes a raw water tank 1, an ultrafiltration water inlet pump 2, a self-cleaning filter 3, an ultrafiltration apparatus 5, a water production tank 6, a tail gas destruction device 14, a backwash water pump 7, an air compressor subsystem 12, an ozone generator subsystem, and a chemical dosing cleaning subsystem;
the ozone generator subsystem comprises a mixer 4 and an ozone generator 13;
the water outlet of the raw water tank 1, the ultrafiltration water inlet pump 2, the mixer 4, the self-cleaning filter 3, the ultrafiltration equipment 5 and the water inlet of the water production tank 6 are communicated in sequence; the tail gas destruction device 14 is arranged at the top of the water production tank 6 and is used for recovering ozone entering the water production tank 6;
the ozone generator 13 is communicated with the mixer 4;
the top water production outlet 19 of the ultrafiltration device 5 is also communicated with the product water outlet of the water production tank 6 through a back flush water pump 7; the air compressor subsystem 12 is communicated with the bottom air inlet of the ultrafiltration device 5;
the raw water tank 6 is also provided with a backwashing water inlet 16 and a raw water inlet 17; the ultrafiltration device 5 is also provided with a top backwashing water outlet 18, and the top backwashing water outlet 18 of the ultrafiltration device is communicated with a backwashing water inlet 16 of the raw water tank;
the dosing and cleaning subsystem comprises a medicament dosing tank 8, a medicament dosing pump 9, an acid dosing tank 10, an acid dosing pump 11 and a dosing output pipeline 15; the medicament feeding box 8 is communicated with the medicament feeding end of the medicament feeding pump 9; the acid agent dosing box 10 is communicated with the feeding end of the acid agent dosing pump 11; the drug outlet end of the drug dosing pump 9 and the drug outlet end of the acid dosing pump 11 are communicated with a pipeline between the water outlet of the self-cleaning filter 3 and the water inlet at the bottom of the ultrafiltration device 5 through the drug outlet pipeline 15;
a liquid level meter (not shown) is arranged in the raw water tank 1.
Example 2
The embodiment provides a system for cleaning an ultrafiltration membrane, and as shown in fig. 2, the system comprises a raw water tank 1, an ultrafiltration water inlet pump 2, a self-cleaning filter 3, an ultrafiltration device 5, a water production tank 6, a tail gas destruction device 14, a backwashing water pump 7, an air compressor subsystem 12, an ozone generator subsystem and a dosing cleaning subsystem;
the water outlet of the raw water tank 1, the ultrafiltration water inlet pump 2, the self-cleaning filter 3, the ultrafiltration equipment 5 and the water inlet of the water production tank 6 are communicated in sequence; the tail gas destruction device 14 is arranged at the top of the water production tank 6 and is used for recovering ozone entering the water production tank 6;
the top water production outlet 19 of the ultrafiltration device 5 is also communicated with the product water outlet of the water production tank 6 through a back flush water pump 7; the air compressor subsystem 12 is communicated with the bottom air inlet of the ultrafiltration device 5;
the ozone generator subsystem comprises a mixer 4 and an ozone generator 13;
the mixer 4 is arranged between the water outlet of the backwashing water pump 7 and the top water outlet 19 of the ultrafiltration device 5, and the ozone generator 13 is communicated with the product water inlet of the mixer 4;
the dosing and cleaning subsystem comprises a medicament dosing tank 8, a medicament dosing pump 9, an acid dosing tank 10, an acid dosing pump 11 and a dosing output pipeline 15; the medicament feeding box 8 is communicated with the medicament feeding end of the medicament feeding pump 9; the acid agent feeding box 10 is communicated with the feeding end of the acid agent feeding pump 11; the drug outlet end of the drug adding pump 9 and the drug outlet end of the acid agent adding pump 11 are communicated with the pipeline between the water outlet of the self-cleaning filter 3 and the water inlet at the bottom of the ultrafiltration device 5 through the drug output pipeline 15.
The raw water tank 1 is also provided with a backwashing water inlet 16 and a raw water inlet 17; the ultrafiltration equipment is also provided with a top backwashing water outlet 18, and the top backwashing water outlet 18 of the ultrafiltration equipment is communicated with the backwashing water inlet 16 of the raw water tank. A liquid level meter (not shown) is arranged in the raw water tank 1.
Example 3
The embodiment provides a method for cleaning an ultrafiltration membrane, which adopts the system described in embodiment 1 and comprises the following steps:
s1: when a liquid level meter detects that the liquid level in a raw water tank 1 reaches a starting liquid level, an ultrafiltration water inlet pump 2 is automatically started, raw water in the raw water tank 1 and ozone from an ozone generator 13 are conveyed to a mixer 4 and a self-cleaning filter 3 together, larger granular impurities in water are primarily filtered, the ozone is fully contacted with organic pollutants in the raw water through the self-cleaning filter 3 and the mixer 4 to generate oxidation reaction, and the organic pollutants are thoroughly decomposed;
the adding concentration of the ozone is 10 mg/L;
s2: conveying the raw water subjected to oxidative decomposition to the ultrafiltration equipment 5 for filtration, then conveying the raw water into the water production tank 6 as product water, and simultaneously recovering and decomposing ozone entering the water production tank 6 into oxygen through the tail gas destruction device 14 and then discharging the oxygen out of the system;
s3: and the product water of the water production tank is conveyed to a top water production outlet 19 of the ultrafiltration equipment by using the backwashing water pump 7, membrane wires in the ultrafiltration equipment 5 are backwashed reversely, and meanwhile, the membrane wires in the ultrafiltration equipment 5 are subjected to air oscillation and air bubble scrubbing by the air compressor subsystem 12.
The ultrafiltration membrane of the embodiment is an ultrafiltration membrane resistant to ozone oxidation.
Example 4
The embodiment provides a method for cleaning an ultrafiltration membrane, which adopts the system described in embodiment 2 and comprises the following steps:
s1: when a liquid level meter detects that the liquid level in a raw water tank 1 reaches a starting liquid level, an ultrafiltration water inlet pump 2 is automatically started, raw water in the raw water tank 1 is conveyed to a self-cleaning filter 3, and the raw water is subjected to primary filtration treatment;
s2: conveying the raw water subjected to the primary filtration treatment to the ultrafiltration equipment 5 for secondary filtration treatment, and then conveying the raw water into the water production tank 6 to be used as product water;
s3: the product water in the water production tank 6 and the ozone are sequentially conveyed to the mixer 4 and a top water production outlet 19 of the ultrafiltration device 5 by using the backwash water pump 7, membrane wires in the ultrafiltration device 5 are reversely subjected to oxidation backwash, and meanwhile, the membrane wires in the ultrafiltration device 5 are subjected to air oscillation and bubble scrubbing by using the air compressor subsystem 12; and the ozone entering the water production tank 6 is recycled and decomposed by the tail gas destruction device 14 and then discharged out of the system.
The adding concentration of the ozone is 10 mg/L.
The ultrafiltration membrane of the embodiment is an ultrafiltration membrane resistant to ozone oxidation.
Example 5
This example provides a method for cleaning an ultrafiltration membrane, and the only difference between this example and example 4 is that:
the step S3 further includes: and the medicament and the acid agent are sent to a water inlet at the bottom of the ultrafiltration equipment through the medicament feeding pump 9 and the acid agent feeding pump 11 of the medicament feeding and cleaning subsystem.
The medicament is sodium hypochlorite.
Comparative example
The comparative example provides a method for cleaning an ultrafiltration membrane, and the comparative example is different from the example 4 only in that: instead of reversely carrying out oxidation back washing on the membrane wires in the ultrafiltration device 5 by using ozone, the back washing water pump 7 is only used for conveying the product water in the water production tank 6 to the top water production outlet 19 of the ultrafiltration device 5, and reversely carrying out back washing on the membrane wires in the ultrafiltration device 5.
Test example
This test example compares the COD, polysaccharide and protein removal rates and transmembrane pressure difference of the ultrafiltration membrane cleaning methods of example 4 and comparative example 1, and the results are shown in table 1, fig. 3, and 4, respectively.
TABLE 1
Through table 1 analysis discovery, the utility model discloses can reduce the content of COD, polysaccharide and protein in the ultrafiltration system product water, make the system be in high-efficient stable running state.
Through the analysis of fig. 3 and 4, the utility model discloses under the condition of keeping constant flow water production, can make membrane system average operation transmembrane pressure reduce more than 8 kpa.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A system for cleaning an ultrafiltration membrane is characterized by comprising a raw water tank, an ultrafiltration water inlet pump, a self-cleaning filter, ultrafiltration equipment, a water production tank, a tail gas destruction device, a backwashing water pump, an air compressor subsystem, an ozone generator subsystem and an optional chemical adding and cleaning subsystem;
the water outlet of the raw water tank, the ultrafiltration water inlet pump, the self-cleaning filter, the ultrafiltration equipment and the water inlet of the water production tank are communicated in sequence; the tail gas destruction device is arranged at the top of the water production tank and used for recovering ozone entering the water production tank;
the top water production outlet of the ultrafiltration equipment is also communicated with the product water outlet of the water production tank through a back flush water pump; the air compressor subsystem is communicated with a bottom air inlet of the ultrafiltration device;
the ozone generator subsystem comprises a mixer and an ozone generator;
the mixer is arranged between the water outlet of the ultrafiltration water inlet pump and the water inlet of the self-cleaning filter, and the ozone generator is communicated with the mixer; a dosing output pipeline of the dosing cleaning subsystem is communicated with a pipeline between the water outlet of the self-cleaning filter and the bottom water inlet of the ultrafiltration device;
or the mixer is arranged between the water outlet of the backwashing water pump and the top water outlet of the ultrafiltration equipment, and the ozone generator is communicated with the product water inlet of the mixer; a dosing output pipeline of the dosing cleaning subsystem is communicated with a pipeline between the water outlet of the self-cleaning filter and the bottom water inlet of the ultrafiltration device;
and a liquid level meter is arranged in the raw water tank.
2. The system for cleaning ultrafiltration membranes according to claim 1, wherein said raw water tank is further provided with a backwash water inlet and a raw water inlet.
3. The system for cleaning ultrafiltration membranes according to claim 2, wherein said ultrafiltration apparatus is further provided with a top backwash water outlet.
4. The system for cleaning ultrafiltration membranes according to claim 3, wherein a top backwash water outlet of the ultrafiltration device is in communication with a backwash water inlet of the raw water tank.
5. The system for cleaning ultrafiltration membranes according to claim 1, wherein the dosing cleaning subsystem comprises a drug dosing tank, a drug dosing pump, an acid dosing tank, an acid dosing pump and the dosing output line.
6. The system for cleaning ultrafiltration membranes according to claim 5, wherein said chemical dosing tank is in communication with a feed end of said chemical dosing pump.
7. The system for cleaning ultrafiltration membranes according to claim 6, wherein said acid dosing tank is in communication with a feed end of said acid dosing pump.
8. The system for cleaning the ultrafiltration membrane according to claim 7, wherein the drug outlet end of the drug dosing pump and the drug outlet end of the acid dosing pump are both communicated with the drug outlet pipeline.
9. The system for cleaning the ultrafiltration membrane according to claim 8, wherein the agent is sodium hypochlorite or sodium hydroxide.
10. The system for cleaning ultrafiltration membranes according to claim 8, wherein the acidic agent is citric acid, oxalic acid or hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221386616.3U CN217511590U (en) | 2022-06-01 | 2022-06-01 | Cleaning system of milipore filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221386616.3U CN217511590U (en) | 2022-06-01 | 2022-06-01 | Cleaning system of milipore filter |
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| CN217511590U true CN217511590U (en) | 2022-09-30 |
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| CN202221386616.3U Active CN217511590U (en) | 2022-06-01 | 2022-06-01 | Cleaning system of milipore filter |
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