CN113304616A - Hollow fiber ultrafiltration membrane cleaning agent - Google Patents
Hollow fiber ultrafiltration membrane cleaning agent Download PDFInfo
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- CN113304616A CN113304616A CN202110636159.2A CN202110636159A CN113304616A CN 113304616 A CN113304616 A CN 113304616A CN 202110636159 A CN202110636159 A CN 202110636159A CN 113304616 A CN113304616 A CN 113304616A
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- 239000012528 membrane Substances 0.000 title claims abstract description 65
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 44
- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 44
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 38
- 239000002351 wastewater Substances 0.000 claims abstract description 25
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 10
- 238000004043 dyeing Methods 0.000 claims abstract description 9
- 238000007639 printing Methods 0.000 claims abstract description 9
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 7
- 239000005416 organic matter Substances 0.000 claims abstract description 7
- 231100000719 pollutant Toxicity 0.000 claims abstract description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 6
- 239000002738 chelating agent Substances 0.000 claims abstract description 6
- 239000002270 dispersing agent Substances 0.000 claims abstract description 6
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 5
- 239000003899 bactericide agent Substances 0.000 claims abstract description 5
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 5
- 239000004094 surface-active agent Substances 0.000 claims abstract description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 4
- 230000003647 oxidation Effects 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- 230000002378 acidificating effect Effects 0.000 claims abstract description 3
- 239000013522 chelant Substances 0.000 claims abstract description 3
- 239000000645 desinfectant Substances 0.000 claims abstract description 3
- 238000005554 pickling Methods 0.000 claims abstract description 3
- 239000002689 soil Substances 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- -1 alkenyl sulfonate Chemical compound 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- WDUYWZBDUMTSAH-UHFFFAOYSA-N dodecyl dodecanoate;sodium Chemical compound [Na].CCCCCCCCCCCCOC(=O)CCCCCCCCCCC WDUYWZBDUMTSAH-UHFFFAOYSA-N 0.000 claims description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 239000001509 sodium citrate Substances 0.000 claims description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 2
- 238000011282 treatment Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000011086 high cleaning Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000002585 base Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- OYXVDHZABMXCMX-UHFFFAOYSA-N 2-decyltetradecanoic acid Chemical compound CCCCCCCCCCCCC(C(O)=O)CCCCCCCCCC OYXVDHZABMXCMX-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 239000003139 biocide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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
- B01D65/06—Membrane cleaning or sterilisation ; Membrane regeneration with special washing compositions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of filter membrane cleaning treatment, and particularly relates to a hollow fiber ultrafiltration membrane cleaning agent which consists of a component A and a component B; the component A is an acidic cleaning agent and mainly aims at cleaning inorganic scaling, soft soil and inorganic chelate pollutants; the EDTA-2Na acid pickling agent comprises the following main components in percentage by weight: 5-10: 5; the acid solution is one or more of hydrochloric acid, phosphoric acid, nitric acid and oxalic acid; the component B is an alkaline cleaning agent, mainly aims at cleaning oily wastewater, printing and dyeing wastewater and chemical wastewater membrane pollution with higher organic matter content, and comprises the following main components: the disinfectant comprises an oxidation bactericide, a surfactant, a dispersant, a chelating agent and an alkaline assistant. The prepared cleaning agent mainly aims at cleaning the pollution of the ultrafiltration membrane caused by oily wastewater, printing and dyeing wastewater and chemical wastewater with high organic matter content; the cleaning agent has the characteristics of strong pertinence, environmental protection, high cleaning efficiency and low cleaning cost, and is simple in preparation process and easy to produce.
Description
Technical Field
The invention belongs to the technical field of filter membrane cleaning treatment, and particularly relates to a hollow fiber ultrafiltration membrane cleaning agent.
Background
In the last decade, low pressure membrane processes (ultrafiltration and microfiltration) have achieved significant development and widespread use. Because the device has the characteristics of simple equipment, small occupied area, unchanged phase state, low operating pressure, low material requirement, simple equipment and the like, the application range of the device also rapidly extends from the research field to the practical application field, such as electronics, medicines, electrophoretic paint, beverages, food chemical industry, medical treatment, wastewater treatment and recycling and the like. At present, novel membrane materials are developed, and high-performance membrane material modification schemes are searched, so that low-pressure separation membranes with more excellent performances including high pollution resistance, high flux, high interception and the like are obtained.
Despite the great advances made in low pressure membrane technology, membrane fouling remains one of the major problems for ultrafiltration membrane applications in water treatment. Including the formation of a solute adsorption layer on the membrane surface, the plugging of membrane pores and the formation of inorganic scale. Inevitably, the membrane must be subjected to maintenance (chemical) cleaning to remove contaminants. Membrane cleaning includes physical rinsing and chemical cleaning. Physical cleaning includes hydraulic flushing, gas pulse backwashing, mechanical cleaning, and the like. Can obtain good cleaning effect under the condition that the film pollution layer is loose. However, in general, the physical cleaning effect is not good because a dense contaminated layer is formed and the pores of the membrane are clogged by the membrane contamination. Chemical cleaning is a series of multiphase reactions between pollutants and cleaning agents to remove the pollutants from the membrane wires, and the common cleaning agents for chemical cleaning comprise: acid-alkali liquor, surface active liquor, oxidation biocide, degerming agent, chelating agent and dispersing agent. At present, acid-base cleaning agents are commonly used in the market, and not only are the price high, the pertinence low and the decontamination effect poor, but also the service life of the ultrafiltration membrane is shortened, and the water yield and the water quality of produced water are greatly reduced. Therefore, the development of a high-efficiency, low-cost and highly-targeted membrane cleaning agent becomes a key problem in the application of the current ultrafiltration membrane.
Disclosure of Invention
In view of the problems raised by the above background art, the present invention is directed to: aiming at providing a hollow fiber ultrafiltration membrane cleaning agent.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a hollow fiber ultrafiltration membrane cleaning agent consists of a component A and a component B;
the component A is an acidic cleaning agent and mainly aims at cleaning inorganic scaling, soft soil and inorganic chelate pollutants; the EDTA-2Na acid pickling agent mainly comprises acid liquor and EDTA-2Na, wherein the weight ratio of the acid liquor to the EDTA-2Na is 4: 5-10: 5;
the acid solution is one or more of hydrochloric acid, phosphoric acid, nitric acid and oxalic acid;
the component B is an alkaline cleaning agent, mainly aims at cleaning oily wastewater, printing and dyeing wastewater and chemical wastewater membrane pollution with higher organic matter content, and comprises the following main components: the disinfectant comprises an oxidation bactericide, a surfactant, a dispersant, a chelating agent and an alkaline assistant.
In a preferred embodiment of the present invention, the oxidizing bactericide is one of hydrogen peroxide, ozone, and potassium permanganate.
As a preferable scheme of the invention, the surfactant is one or a mixture of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, sodium dodecyl laurate and alpha-sodium alkenyl sulfonate.
In a preferred embodiment of the present invention, the dispersant is one or a mixture of maleic anhydride and acrylic acid.
As a preferable scheme of the invention, the chelating agent is one or a mixture of EDTA-4Na or sodium citrate;
as a preferred scheme of the invention, the alkaline auxiliary agent is one or a mixture of sodium hydroxide, sodium carbonate and sodium bicarbonate.
As a preferable scheme of the invention, the using method of the cleaning agent comprises the following steps:
s1: preparing a component A and a component B according to a proportion;
s2: respectively preparing the component A and the component B into aqueous solutions with the mass ratio of 1% to obtain a solution A and a solution B;
s3: adjusting the pH value of the solution A to 2-3, and adjusting the pH value of the solution B to 10-11;
s4: and cleaning the membrane by using the solution A, and cleaning the membrane by using the solution B to finish cleaning.
By adopting the technical scheme of the invention,
the invention has the following effective effects:
1. the hollow fiber ultrafiltration membrane cleaning agent prepared by the invention has strong pertinence, and can powerfully remove petrochemical wastewater, printing and dyeing wastewater and chemical wastewater with high organic matter content from the ultrafiltration membrane under different matching conditions;
2. the hollow fiber ultrafiltration membrane cleaning agent prepared by the invention improves the cleaning quality, and can effectively remove various organic matters, organic chelates and printing and dyeing pollutants;
3. the prepared hollow fiber ultrafiltration membrane cleaning agent simplifies the cleaning steps, shortens the cleaning time and reduces the cleaning frequency;
4. the flux of the ultrafiltration membrane cleaned by the method can be recovered to more than 90% of the original flux.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following embodiments are provided to further illustrate the present invention.
Example one
The hollow fiber ultrafiltration membrane cleaning agent disclosed by the invention is composed of a component A and a component B; wherein the component A comprises the following components in parts by weight: 6 parts of phosphoric acid, 2 parts of nitric acid and 5 parts of EDTA-2 Na;
the component B comprises the following components in parts by weight: 6 parts of potassium permanganate, 5 parts of EDTA-4Na, 5 parts of dodecyl lauric acid and 4 parts of sodium hydroxide;
before the ultrafiltration membrane cleaning agent is used, the component A and the component B are respectively prepared into aqueous solutions with the weight percentage of 1 percent to obtain a solution A and a solution B;
then adjusting the pH value of the solution A to 2-3; the pH value of the solution B is 10-11;
the solution A and the solution B are used for cleaning an ultrafiltration membrane in the printing and dyeing wastewater; the water quality of the printing and dyeing wastewater is reported as follows:
| water quality analysis | Analysis results |
| Color intensity | 110 |
| Turbidity (NTU) | 8.50 |
| Suspended substance (mg/L) | 27 |
| Hardness (CaCO3) (mg/L) | 923 |
| TDS(mg/L) | 1,750 |
| BODS(mg/L) | 36.9 |
| CODCr(mg/L) | 109 |
| TOC(mg/L) | 27.9 |
| SO42-(mg/L) | 706 |
| PO43-(mg/L) | 0.04 |
| Ca(mg/L) | 438 |
| Mg(mg/L) | 5.81 |
| Al(mg/L) | <0.0025 |
| Fe(mg/L) | 0.306 |
| Organosilicon (mg/L) | 0.498 |
| Total number of colonies (CFU/mL) | 80,000 |
After cleaning, the recovery of the ultrafiltration membrane is 92% of the original flux, while the flux of the ultrafiltration membrane cannot be recovered by the traditional acid-base cleaning agent.
Example two
The hollow fiber ultrafiltration membrane cleaning agent disclosed by the invention is composed of a component A and a component B; wherein the component A comprises the following components in parts by weight: 6 parts of phosphoric acid, 3 parts of oxalic acid and 5 parts of EDTA-2 Na;
the component B comprises the following components in parts by weight: 10 parts of hydrogen peroxide, 5 parts of EDTA-4Na, 5 parts of sodium dodecyl sulfate and 6 parts of sodium carbonate;
before the ultrafiltration membrane cleaning agent is used, the component A and the component B are respectively prepared into aqueous solutions with the weight percentage of 1 percent to obtain a solution A and a solution B;
then adjusting the pH value of the solution A to 2-3; the pH value of the solution B is 10-11;
the solution A and the solution B are used for cleaning an ultrafiltration membrane in the oily wastewater; the water quality of the oily wastewater is reported as follows:
| water quality analysis | Analysis results |
| Color intensity | 70 |
| Turbidity (NTU) | 18.50 |
| Hardness (CaCO3) (mg/L) | 3770 |
| TOC(mg/L) | 9.4 |
| Oil (mg/L) | 1.264 |
| SO42-(mg/L) | 1382 |
| PO43-(mg/L) | ND |
| Ca(mg/L) | 313 |
| Mg(mg/L) | 817 |
| Organosilicon (mg/L) | 2.4 |
| Total number of colonies (CFU/mL) | 31500 |
After cleaning, the recovery of the ultrafiltration membrane is 90% of the original flux, while the flux of the ultrafiltration membrane cannot be recovered by the traditional acid-base cleaning agent.
EXAMPLE III
The hollow fiber ultrafiltration membrane cleaning agent disclosed by the invention is composed of a component A and a component B; wherein the component A comprises the following components in parts by weight: 4 parts of hydrochloric acid, and EDTA-2Na5 parts;
the component B comprises the following components in parts by weight: 10 parts of potassium permanganate, 5 parts of EDTA-4Na, 5 parts of sodium dodecyl sulfate and 6 parts of sodium hydroxide;
before the ultrafiltration membrane cleaning agent is used, the component A and the component B are respectively prepared into aqueous solutions with the weight percentage of 1 percent to obtain a solution A and a solution B;
then adjusting the pH value of the solution A to 2-3; the pH value of the solution B is 10-11;
the solution A and the solution B are used for cleaning an ultrafiltration membrane in the chemical wastewater with high organic matter content; the water quality report of the chemical wastewater with high organic content is as follows:
pollutant analysis shows that the content of organic matters reaches 80.1%, after cleaning, the flux of the ultrafiltration membrane is recovered to 95% of the original flux, and the flux of the ultrafiltration membrane cannot be recovered through the traditional acid-base cleaning agent.
Example four
The hollow fiber ultrafiltration membrane cleaning agent disclosed by the invention is composed of a component A and a component B; wherein the component A comprises the following components in parts by weight: 4 parts of phosphoric acid, 4 parts of oxalic acid, and 4 parts of EDTA-2Na 5;
the component B comprises the following components in parts by weight: 8 parts of potassium permanganate, 4 parts of EDTA-4Na, 5 parts of sodium dodecyl benzene sulfonate and 6 parts of sodium hydroxide;
before the ultrafiltration membrane cleaning agent is used, the component A and the component B are respectively prepared into aqueous solutions with the weight percentage of 1 percent to obtain a solution A and a solution B;
then adjusting the pH value of the solution A to 2-3; the pH value of the solution B is 10-11;
after the solution A and the solution B are used for cleaning and washing the ultrafiltration membrane of the chemical wastewater with higher organic content in the third embodiment, the flux of the ultrafiltration membrane is recovered to 98% of the original flux, but the flux of the ultrafiltration membrane cannot be recovered by the traditional acid-base cleaning agent.
In conclusion, the cleaning agent prepared by the invention mainly aims at cleaning the pollution of the ultrafiltration membrane caused by oily wastewater, printing and dyeing wastewater and chemical wastewater with high organic matter content; the cleaning agent has the characteristics of strong pertinence, environmental protection, high cleaning efficiency and low cleaning cost, and is simple in preparation process and easy to produce.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A hollow fiber ultrafiltration membrane cleaning agent is characterized in that: it consists of a component A and a component B;
the component A is an acidic cleaning agent and mainly aims at cleaning inorganic scaling, soft soil and inorganic chelate pollutants; the EDTA-2Na acid pickling agent mainly comprises acid liquor and EDTA-2Na, wherein the weight ratio of the acid liquor to the EDTA-2Na is 4: 5-10: 5;
the acid solution is one or more of hydrochloric acid, phosphoric acid, nitric acid and oxalic acid;
the component B is an alkaline cleaning agent, mainly aims at cleaning oily wastewater, printing and dyeing wastewater and chemical wastewater membrane pollution with higher organic matter content, and comprises the following main components: the disinfectant comprises an oxidation bactericide, a surfactant, a dispersant, a chelating agent and an alkaline assistant.
2. The hollow fiber ultrafiltration membrane cleaning agent according to claim 1, which is characterized in that: the oxidizing bactericide is one of hydrogen peroxide, ozone and potassium permanganate.
3. The hollow fiber ultrafiltration membrane cleaning agent according to claim 1, which is characterized in that: the surfactant is one or a mixture of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, sodium dodecyl laurate and alpha-sodium alkenyl sulfonate.
4. The hollow fiber ultrafiltration membrane cleaning agent according to claim 1, which is characterized in that: the dispersant is one or a mixture of maleic anhydride and acrylic acid.
5. The hollow fiber ultrafiltration membrane cleaning agent according to claim 1, which is characterized in that: the chelating agent is one or a mixture of EDTA-4Na or sodium citrate.
6. The hollow fiber ultrafiltration membrane cleaning agent according to claim 1, which is characterized in that: the alkaline auxiliary agent is one or a mixture of sodium hydroxide, sodium carbonate and sodium bicarbonate.
7. The hollow fiber ultrafiltration membrane cleaning agent according to claim 1, which is characterized in that: the use method of the cleaning agent comprises the following steps:
s1: preparing a component A and a component B according to a proportion;
s2: respectively preparing the component A and the component B into aqueous solutions with the mass ratio of 1% to obtain a solution A and a solution B;
s3: adjusting the pH value of the solution A to 2-3, and adjusting the pH value of the solution B to 10-11;
s4: and cleaning the membrane by using the solution A, and cleaning the membrane by using the solution B to finish cleaning.
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| CN202110636159.2A CN113304616A (en) | 2021-06-08 | 2021-06-08 | Hollow fiber ultrafiltration membrane cleaning agent |
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| CN202110636159.2A CN113304616A (en) | 2021-06-08 | 2021-06-08 | Hollow fiber ultrafiltration membrane cleaning agent |
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| JP2017113729A (en) * | 2015-12-25 | 2017-06-29 | 栗田工業株式会社 | Membrane cleaning agent, membrane cleaning liquid and cleaning method of membrane |
| CN107754612A (en) * | 2016-08-16 | 2018-03-06 | 贵阳时代沃顿科技有限公司 | A kind of cleaning agent of reverse-osmosis membrane element cleaning to for concentrating tea and preparation method thereof |
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