CN112473383A - Method for cleaning organic matters on ultrafiltration membrane - Google Patents
Method for cleaning organic matters on ultrafiltration membrane Download PDFInfo
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- CN112473383A CN112473383A CN202011574101.1A CN202011574101A CN112473383A CN 112473383 A CN112473383 A CN 112473383A CN 202011574101 A CN202011574101 A CN 202011574101A CN 112473383 A CN112473383 A CN 112473383A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/20—Accessories; Auxiliary operations
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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
-
- 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
- B01D2321/164—Use of bases
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a method for cleaning organic matters on an ultrafiltration membrane, which relates to the technical field of ultrafiltration membrane cleaning and comprises the following steps: (1) preparing an alkaline cleaning solution; (2) washing with product water; (3) pouring the prepared alkaline cleaning solution into a cleaning box; (5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane with the alkaline cleaning liquid (6) and adding new alkaline cleaning liquid; (7) the product water is filled into the cleaning tank, the product water is firstly used for washing the filtering membrane, some dust and soft impurities covered on the filtering membrane are completely cleaned, all organic matters on the ultrafiltration membrane can be completely decomposed by soaking the ultrafiltration membrane in the alkaline cleaning solution, and then the whole cleaning tank cleans the deposited organic matters on the ultrafiltration membrane completely after the alkaline cleaning solution is circularly washed, so that the service life of the ultrafiltration membrane is greatly prolonged, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of ultrafiltration membrane cleaning, in particular to a method for cleaning organic matters on an ultrafiltration membrane.
Background
The industrial application of the ultrafiltration membrane is very wide, and the ultrafiltration membrane becomes one of novel chemical unit operations. Used in the separation, concentration and purification of biological products, medical products and food industry, and also used in blood treatment, waste water treatment and terminal treatment device in ultrapure water preparation. The ultrafiltration membrane is successfully used for the concentration and purification of Chinese herbal medicines and the research and development and the use of water purification equipment in China, particularly the PVC alloy ultrafiltration membrane researched and developed in China overcomes the world problem of the industrial production of high-quality ultrafiltration membranes by common PVC materials, reduces the production cost and the operation energy consumption of the ultrafiltration membrane, improves the filtration performance and the service life of the ultrafiltration membrane, and is listed as an energy-saving emission-reduction recommended product by the state intellectual property bureau. With the progress of the technology, the screening function of the ultrafiltration membrane is improved and strengthened, and the contribution to the human society is increased.
Ultrafiltration membranes must be periodically cleaned during use to maintain a certain membrane permeate flux and to extend the life of the membrane. The cleaning method is generally determined according to the properties of the ultrafiltration membrane and the properties of the treatment feed liquid, the ultrafiltration membrane is usually cleaned by product water power firstly, and then different cleaning liquids are adopted for cleaning according to conditions, and the selection of the cleaning liquids directly influences the service life of the ultrafiltration membrane. Organic matters easily block the ultrafiltration membrane, so that the service life of the ultrafiltration membrane is shortened, the ultrafiltration membrane needs to be frequently replaced, the production progress is seriously influenced, and the production efficiency is low.
Disclosure of Invention
The invention aims to provide a method for cleaning organic matters on an ultrafiltration membrane, which aims to solve the technical problem.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(7) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(8) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(9) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
Preferably, the pH value of the alkaline cleaning solution is 10-12.
Preferably, the alkaline cleaning solution comprises the following components in parts by weight:
1-2 parts of sodium hydroxide, 0.1-0.3 part of sodium hypochlorite, 0.1-0.2 part of sodium tripolyphosphate, 0.5-0.8 part of tridecyl isomeric alcohol polyoxyethylene and 95-98 parts of ether product water.
Preferably, the product water is free chlorine-free water.
Preferably, the concentration of the alkaline cleaning solution is detected every 3 to 5 minutes in the steps (4), (5) and (6).
Preferably, the sodium hydroxide is 2 parts, the sodium hypochlorite is 0.2 part, the sodium tripolyphosphate is 0.1 part, the tridecyl isomeric alcohol polyoxyethylene is 0.7 part, and the ether product water is 97 parts.
The invention has the beneficial effects that:
the invention firstly washes the filtering membrane with the product water, completely cleans some dust and soft impurities covered on the filtering membrane, ensures that the cleaning effect of the following alkaline cleaning solution is better, ensures that the cleaning effect of the product water on the ultrafiltration membrane is good and the impurities on the ultrafiltration membrane are more thoroughly cleaned by the cleaning mode of firstly soaking and then washing, can completely decompose all organic matters on the ultrafiltration membrane by soaking the ultrafiltration membrane with the alkaline cleaning solution, becomes fine particles to be dissolved in the alkaline cleaning solution, can completely clean the organic matters after the cyclic washing of the alkaline cleaning solution, then washes the product water again, cleans the residual alkaline cleaning solution, finally pumps high-purity clear water into the ultrafiltration membrane for the cyclic washing by a cleaning pump, finishes the whole cleaning process, and uses the cleaning solution by the washing method of washing and soaking which are mutually alternated, the organic matters precipitated on the ultrafiltration membrane are cleaned completely, the service life of the ultrafiltration membrane is greatly prolonged, the working efficiency of the ultrafiltration membrane is improved, and the practicability is high.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.
Specific embodiments of the present invention are described below.
Example 1
A method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(7) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(8) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(9) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
The alkaline cleaning solution comprises the following components in parts by weight:
1 part of sodium hydroxide, 0.1 part of sodium hypochlorite, 0.1 part of sodium tripolyphosphate, 0.5 part of tridecyl isomeric alcohol polyoxyethylene and 95 parts of ether product water.
Example 2
A method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(7) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(8) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(9) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
The alkaline cleaning solution comprises the following components in parts by weight:
0.5 part of sodium hydroxide, 0.2 part of sodium hypochlorite, 0.15 part of sodium tripolyphosphate, 0.55 part of tridecyl isomeric alcohol polyoxyethylene and 96.5 parts of ether product water.
Example 3
A method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(7) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(8) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(9) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
The alkaline cleaning solution comprises the following components in parts by weight:
2 parts of sodium hydroxide, 0.3 part of sodium hypochlorite, 0.2 part of sodium tripolyphosphate, 0.8 part of tridecyl isomeric alcohol polyoxyethylene and 98 parts of ether product water.
Implement 4
A method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(3) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(4) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(5) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(6) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(7) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
The alkaline cleaning solution comprises the following components in parts by weight:
0.5 part of sodium hydroxide, 0.2 part of sodium hypochlorite, 0.15 part of sodium tripolyphosphate, 0.55 part of tridecyl isomeric alcohol polyoxyethylene and 96.5 parts of ether product water.
Example 5
A method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(7) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(8) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
The alkaline cleaning solution comprises the following components in parts by weight:
0.5 part of sodium hydroxide, 0.2 part of sodium hypochlorite, 0.15 part of sodium tripolyphosphate, 0.55 part of tridecyl isomeric alcohol polyoxyethylene and 96.5 parts of ether product water.
Example 6
A method for cleaning organic matters on an ultrafiltration membrane comprises the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(7) and (3) completely discharging the alkaline cleaning liquid in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and then discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
The alkaline cleaning solution comprises the following components in parts by weight:
0.5 part of sodium hydroxide, 0.2 part of sodium hypochlorite, 0.15 part of sodium tripolyphosphate, 0.55 part of tridecyl isomeric alcohol polyoxyethylene and 96.5 parts of ether product water.
Example analysis:
in the embodiments 1 to 3, the quality of each component in the alkaline cleaning solution is changed, and other processes are not changed;
example 4 compared to example 2, the product water rinse process of steps (2) and (3) was eliminated in example 4, and the other processes were unchanged;
compared with the embodiment 2, the embodiment 5 removes the replacement of the alkaline cleaning solution, reduces the process of soaking the ultrafiltration membrane by using the alkaline cleaning solution, and keeps other processes unchanged;
example 6 compared with example 2, the process of washing the filtration membrane again with product water in steps (7) and (8) was eliminated in example 6, and the other processes were not changed.
Experimental analysis:
the ultrafiltration membranes cleaned in examples 1 to 6 were examined to determine the residual organic matter on the surfaces, and the quality of the cleaning results was evaluated.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A method for cleaning organic matters on an ultrafiltration membrane is characterized by comprising the following steps:
(1) preparing an alkaline cleaning solution for later use;
(2) product water washing: taking an ultrafiltration membrane to be cleaned, closing an ultrafiltration water valve, opening a product water discharge valve, and pumping product water into the ultrafiltration membrane from a cleaning tank through a cleaning pump;
(3) after the product water is washed for 20-30 min, closing a product water discharge valve and stopping washing;
(4) taking a clean cleaning box, pouring all prepared alkaline cleaning solution into the cleaning box, and then putting the ultrafiltration membrane washed by the product water into the cleaning box to ensure that the alkaline cleaning solution in the cleaning box submerges the ultrafiltration membrane;
(5) soaking the ultrafiltration membrane in a cleaning box for 1-2 hours, then starting a cleaning pump, pumping alkaline cleaning liquid into the ultrafiltration membrane, and circularly cleaning the ultrafiltration membrane by the alkaline cleaning liquid for 15-20 min;
(6) after the cyclic washing is finished, completely discharging the alkaline cleaning solution in the cleaning box, then adding new alkaline cleaning solution, placing the ultrafiltration membrane in the cleaning box, and soaking for 15-20 hours;
(7) discharging alkaline cleaning liquid in the cleaning tank, then washing the cleaning tank by using product water, and filling the product water into the cleaning tank after the cleaning tank is cleaned;
(8) pumping product water into the ultrafiltration membrane by using a cleaning pump, and circularly cleaning the ultrafiltration membrane; the circulating cleaning time is 25-30 min;
(9) and discharging all product water in the cleaning box, flushing the cleaning box with high-purity clear water, filling the interior of the cleaning box with the high-purity clear water, pumping the high-purity clear water into the ultrafiltration membrane for circulating flushing by using a cleaning pump for 25-30 min, and discharging the high-purity clear water in the cleaning box to finish the whole cleaning process.
2. The method for cleaning the organic matter on the ultrafiltration membrane according to claim 1, wherein the method comprises the following steps: the pH value of the alkaline cleaning solution is 10-12.
3. The method for cleaning the organic matter on the ultrafiltration membrane according to claim 1, wherein the method comprises the following steps: the alkaline cleaning solution comprises the following components in parts by weight:
1-2 parts of sodium hydroxide, 0.1-0.3 part of sodium hypochlorite, 0.1-0.2 part of sodium tripolyphosphate, 0.5-0.8 part of tridecyl isomeric alcohol polyoxyethylene and 95-98 parts of ether product water.
4. The method for cleaning the organic matter on the ultrafiltration membrane according to claim 1, wherein the method comprises the following steps: the product water is free chlorine-free water.
5. The method for cleaning the organic matter on the ultrafiltration membrane according to claim 1, wherein the method comprises the following steps: and (4) detecting the concentration of the alkaline cleaning solution every 3-5 minutes in the steps (4), (5) and (6).
6. The method for cleaning the organic matter on the ultrafiltration membrane according to claim 1, wherein the method comprises the following steps: 2 parts of sodium hydroxide, 0.2 part of sodium hypochlorite, 0.1 part of sodium tripolyphosphate, 0.7 part of tridecyl isomeric alcohol polyoxyethylene and 97 parts of ether product water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574101.1A CN112473383A (en) | 2020-12-28 | 2020-12-28 | Method for cleaning organic matters on ultrafiltration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574101.1A CN112473383A (en) | 2020-12-28 | 2020-12-28 | Method for cleaning organic matters on ultrafiltration membrane |
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| Publication Number | Publication Date |
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| CN112473383A true CN112473383A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011574101.1A Withdrawn CN112473383A (en) | 2020-12-28 | 2020-12-28 | Method for cleaning organic matters on ultrafiltration membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307661A (en) * | 2022-01-12 | 2022-04-12 | 武汉艾科滤膜技术有限公司 | Rapid cleaning method for organic matters on surface of ultrafiltration membrane |
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2020
- 2020-12-28 CN CN202011574101.1A patent/CN112473383A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307661A (en) * | 2022-01-12 | 2022-04-12 | 武汉艾科滤膜技术有限公司 | Rapid cleaning method for organic matters on surface of ultrafiltration membrane |
| CN114307661B (en) * | 2022-01-12 | 2022-09-20 | 武汉艾科滤膜技术有限公司 | Rapid cleaning method for organic matters on surface of ultrafiltration membrane |
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Application publication date: 20210312 |