CN110732247A - RO membrane composite cleaning agent - Google Patents
RO membrane composite cleaning agent Download PDFInfo
- Publication number
- CN110732247A CN110732247A CN201810794946.8A CN201810794946A CN110732247A CN 110732247 A CN110732247 A CN 110732247A CN 201810794946 A CN201810794946 A CN 201810794946A CN 110732247 A CN110732247 A CN 110732247A
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- Prior art keywords
- acid
- sodium
- membrane composite
- salt
- composite cleaning
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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
-
- 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
- B01D2321/162—Use of acids
-
- 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)
- Detergent Compositions (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses RO membrane composite cleaning agents, which comprise, by mass, 0.8-1.2 parts of ethylenediaminetetraacetic acid tetrasodium salt, 0.02-0.04 part of dodecylsulfonic acid sodium salt, 0.1-0.3 part of hydrochloric acid, 0.7-1.3 parts of sodium hydrosulfite, 0.4-0.6 part of phosphoric acid, 0.9-1.1 parts of sodium hydrosulfite, 1.8-2.2 parts of citric acid, and the balance deionized water.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to RO membrane composite cleaning agents.
Background
RO (reverse osmosis) reverse osmosis technology, in which the pore size is as small as nanometer (10-9 m at 1 nm), under , H2 molecules can pass through the RO membrane, while impurities such as inorganic salts, heavy metal ions, organic substances, colloids, bacteria and viruses in raw water cannot pass through the RO membrane, so that pure water which can pass through the RO membrane and concentrated water which cannot pass through the RO membrane are strictly distinguished.
The reason for the blockage of the RO membrane inlet is mainly three: proliferation of microorganisms, scaling of heavy metal ions and infiltration of colloids. Wherein the microorganism is bacteria and organic matters in water, the heavy metal ions are positive ions of calcium, magnesium, iron, copper and other heavy metals, and the colloid is secretion of the aquatic organisms. After the substances enter the RO membrane, the membrane pores of the reverse osmosis membrane can be blocked due to the characteristics of the substances.
The prior art discloses RO membrane cleaning agents, which are composed of the following raw materials, by weight, 1-3 parts of malic acid, 0.5-1.5 parts of tartaric acid, 2-5 parts of terephthalic acid, 8-10 parts of sulfinic acid, 6-8 parts of fatty glyceride, 3-5 parts of sodium dodecyl benzene sulfonate and 70-80 parts of water.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide RO membrane composite cleaning agents.
The purpose of the invention can be realized by the following technical scheme:
composite cleaning agent for RO membrane comprises tetrasodium EDTA, sodium dodecylsulfonate, hydrochloric acid, sodium dithionite, phosphoric acid, sodium bisulfite, and citric acid.
Preferably, the weight percentage of the components is as follows:
ethylenediaminetetraacetic acid tetrasodium salt: 0.8-1.2;
sodium salt of dodecyl sulfonic acid: 0.02-0.04;
hydrochloric acid: 0.1-0.3;
sodium dithionite: 0.7-1.3;
phosphoric acid: 0.4-0.6;
sodium bisulfite: 0.9-1.1;
citric acid: 1.8-2.2;
the rest components are deionized water.
Preferably, the weight percentage of the components is as follows:
ethylenediaminetetraacetic acid tetrasodium salt: 1.0;
sodium salt of dodecyl sulfonic acid: 0.025;
hydrochloric acid: 0.2;
sodium dithionite: 1.0;
phosphoric acid: 0.5;
sodium bisulfite: 0.1.0;
citric acid: 2.0;
the rest components are deionized water.
The invention has the beneficial effects that:
the composite cleaning agent can be used for comprehensively removing possible pollutants aiming at the RO membrane, and has the advantages of low component price, comprehensive decontamination capability, strong decontamination capability, low manufacturing cost and simple preparation method.
Detailed Description
The technical scheme of the invention is described in step :
kinds of RO membrane composite cleaning agent, including ethylenediaminetetraacetic acid tetrasodium salt, sodium dodecyl sulfonate, hydrochloric acid, sodium dithionite, phosphoric acid, sodium bisulfite, citric acid;
the weight percentage of the material is as follows: the composition of the ethylene diamine tetraacetic acid tetrasodium salt is 0.8-1.2, the composition of the sodium dodecyl sulfonate salt is 0.02-0.04, the composition of the hydrochloric acid is 0.1-0.3, the composition of the sodium hydrosulfite is 0.7-1.3, the composition of the phosphoric acid is 0.4-0.6, the composition of the sodium bisulfite is 0.9-1.1, the composition of the citric acid is 1.8-2.2, and the rest components are deionized water.
In this embodiment, preferably, the component of ethylenediaminetetraacetic acid tetrasodium salt is 1.0, the component of dodecylsulfonic acid sodium salt is 0.025, the component of hydrochloric acid is 0.2, the component of sodium dithionite is 1.0, the component of phosphoric acid is 0.5, the component of sodium bisulfite is 1.0, the component of citric acid is 2.0, and the rest of the components are deionized water.
In the component, the tetrasodium ethylene diamine tetraacetate can be cleaned, sulfate scales such as calcium sulfate and barium sulfate can be removed, silicon and microbial films can be removed, meanwhile, the -step cleaning can be carried out on organic matters, and the effect is particularly optimal for the sulfate scales.
The sodium dodecyl sulfonate can remove sulfate scale, inorganic colloid such as sludge, silicon and microbial film, and can carry out step for cleaning organic matters, wherein the effect is optimal for the inorganic colloid, the silicon and the microbial film.
Hydrochloric acid can remove inorganic salt scale, such as calcium carbonate, and the organic matter can be cleaned in the second step.
Sodium dithionite can remove inorganic salt scale, metal oxide such as iron oxide, and the removal effect is optimal for the metal oxide.
Phosphoric acid can remove inorganic salt scale, metal oxides such as iron oxides.
Sodium bisulfite can remove metal oxides such as iron oxides.
Citric acid can remove inorganic salt scale, metal oxides such as iron oxides.
Weighing and mixing the fixed raw materials according to a conventional method, adding deionized water, stirring at normal temperature, and slowly adding liquid acid during stirring to obtain the cleaning agent mixture.
Finally, it should be noted that:
the method may be carried out and its application may be carried out by those skilled in the art with reference to the disclosure herein, and it is expressly intended that all such alternatives and modifications as would be apparent to those skilled in the art are deemed to be included within the invention. While the method and application of the present invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the method and application of the invention as described herein may be made and equivalents employed without departing from the spirit and scope of the invention.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and it is intended that the appended claims cover such modifications and equivalents as fall within the true spirit and scope of the invention.
Claims (3)
1, RO membrane composite cleaning agents, which are characterized by comprising ethylene diamine tetraacetic acid tetrasodium salt, sodium dodecyl sulfonate, hydrochloric acid, sodium hydrosulfite, phosphoric acid, sodium bisulfite and citric acid.
2. The RO membrane composite cleaning agent as set forth in claim 1, characterized in that:
the weight percentage of the material is as follows:
ethylenediaminetetraacetic acid tetrasodium salt: 0.8-1.2;
sodium salt of dodecyl sulfonic acid: 0.02-0.04;
hydrochloric acid: 0.1-0.3;
sodium dithionite: 0.7-1.3;
phosphoric acid: 0.4-0.6;
sodium bisulfite: 0.9-1.1;
citric acid: 1.8-2.2;
the rest components are deionized water.
3. The RO membrane composite cleaning agent as set forth in claim 1, characterized in that:
the weight percentage of the material is as follows:
ethylenediaminetetraacetic acid tetrasodium salt: 1.0;
sodium salt of dodecyl sulfonic acid: 0.025;
hydrochloric acid: 0.2;
sodium dithionite: 1.0;
phosphoric acid: 0.5;
sodium bisulfite: 0.1.0;
citric acid: 2.0;
the rest components are deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810794946.8A CN110732247A (en) | 2018-07-19 | 2018-07-19 | RO membrane composite cleaning agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810794946.8A CN110732247A (en) | 2018-07-19 | 2018-07-19 | RO membrane composite cleaning agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110732247A true CN110732247A (en) | 2020-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810794946.8A Pending CN110732247A (en) | 2018-07-19 | 2018-07-19 | RO membrane composite cleaning agent |
Country Status (1)
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| CN (1) | CN110732247A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540823A (en) * | 2022-03-22 | 2022-05-27 | 国药国瑞泰(武汉)流体系统有限公司 | Cleaning agent for removing red rust of pure steam and water for injection system |
Citations (7)
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|---|---|---|---|---|
| CN102059056A (en) * | 2010-12-01 | 2011-05-18 | 浙江理工大学 | Nanofiltration reproduction method of waste reverse osmosis membrane element |
| CN102407077A (en) * | 2011-12-09 | 2012-04-11 | 佛山市新泰隆环保设备制造有限公司 | Regenerating method and device of abandoned reverse osmosis membrane element |
| CN102755836A (en) * | 2012-06-13 | 2012-10-31 | 丰信精细化工(上海)有限公司 | Method for chemically washing reverse osmosis device |
| CN105056765A (en) * | 2015-08-20 | 2015-11-18 | 太仓市金鹿电镀有限公司 | Cleaning method of organic pollutants on ultrafiltration membrane surface and preparation method of cleaning solution for organic pollutants on ultrafiltration membrane surface |
| CN105413475A (en) * | 2015-11-17 | 2016-03-23 | 新疆水处理工程技术研究中心有限公司 | Cleaning agent suitable for cleaning hollow fiber nanofiltration membranes and preparation method thereof |
| CN106334455A (en) * | 2016-11-04 | 2017-01-18 | 中海油天津化工研究设计院有限公司 | Membrane cleaning agent suitable for treating oil refining wastewater containing naphthenic acid dissolution oil |
| EP3329984A1 (en) * | 2015-07-27 | 2018-06-06 | Kurita Water Industries Ltd. | Reverse osmosis membrane cleaning agent, cleaning liquid, and cleaning method |
-
2018
- 2018-07-19 CN CN201810794946.8A patent/CN110732247A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059056A (en) * | 2010-12-01 | 2011-05-18 | 浙江理工大学 | Nanofiltration reproduction method of waste reverse osmosis membrane element |
| CN102407077A (en) * | 2011-12-09 | 2012-04-11 | 佛山市新泰隆环保设备制造有限公司 | Regenerating method and device of abandoned reverse osmosis membrane element |
| CN102755836A (en) * | 2012-06-13 | 2012-10-31 | 丰信精细化工(上海)有限公司 | Method for chemically washing reverse osmosis device |
| EP3329984A1 (en) * | 2015-07-27 | 2018-06-06 | Kurita Water Industries Ltd. | Reverse osmosis membrane cleaning agent, cleaning liquid, and cleaning method |
| CN105056765A (en) * | 2015-08-20 | 2015-11-18 | 太仓市金鹿电镀有限公司 | Cleaning method of organic pollutants on ultrafiltration membrane surface and preparation method of cleaning solution for organic pollutants on ultrafiltration membrane surface |
| CN105413475A (en) * | 2015-11-17 | 2016-03-23 | 新疆水处理工程技术研究中心有限公司 | Cleaning agent suitable for cleaning hollow fiber nanofiltration membranes and preparation method thereof |
| CN106334455A (en) * | 2016-11-04 | 2017-01-18 | 中海油天津化工研究设计院有限公司 | Membrane cleaning agent suitable for treating oil refining wastewater containing naphthenic acid dissolution oil |
Non-Patent Citations (1)
| Title |
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| 王振堃等: "《电渗析和反渗透》", 29 February 1980, 上海科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540823A (en) * | 2022-03-22 | 2022-05-27 | 国药国瑞泰(武汉)流体系统有限公司 | Cleaning agent for removing red rust of pure steam and water for injection system |
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Application publication date: 20200131 |