CN114100376A - Cleaning agent and preparation method and application thereof - Google Patents
Cleaning agent and preparation method and application thereof Download PDFInfo
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- CN114100376A CN114100376A CN202111430480.1A CN202111430480A CN114100376A CN 114100376 A CN114100376 A CN 114100376A CN 202111430480 A CN202111430480 A CN 202111430480A CN 114100376 A CN114100376 A CN 114100376A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention discloses a cleaning agent, a preparation method and application thereof, and belongs to the technical field of water treatment. The cleaning agent comprises 10-20% of a scale remover, 5-10% of a dispersant, 0.5-5% of a penetrating agent, 5-10% of a cosolvent, 0.5-3% of a stripping agent and the balance of demineralized water. The cleaning agent prepared by the invention is used for cleaning reverse osmosis and nanofiltration membrane calcium silicate and composite scale thereof, so that the problem that the traditional strong acid cleaning has high corrosivity on the reverse osmosis membrane, the nanofiltration membrane and metal equipment is effectively solved; the cleaning process generates colloidal silica, which causes secondary pollution to the membrane; the colloidal silica is difficult to remove, and the cleaning of calcium silicate is seriously influenced. The calcium silicate and the composite scale thereof are completely reacted and dispersed in the cleaning solution, meanwhile, the cleaned silicon is not deposited on the membrane surface for the second time, the removal rate of the calcium silicate is more than 98 percent, and finally the aim of zero damage to a reverse osmosis membrane, a nanofiltration membrane and stainless steel equipment is fulfilled. Meanwhile, the cleaning agent provided by the invention can be used for online or offline cleaning according to actual requirements. Has good application value and prospect.
Description
Technical Field
The invention belongs to the technical field of water treatment, and relates to a preparation method of a cleaning agent and the cleaning agent prepared by the preparation method, in particular to a cleaning agent for reverse osmosis, nano-filtration membrane calcium silicate and composite scale thereof.
Background
The reverse osmosis technology is a technology which uses pressure as driving force and realizes substance separation by utilizing the selective permeability of a membrane. In the water treatment of a thermal power plant, reverse osmosis is commonly used for pre-desalting of ion exchange so as to reduce the salt content of inlet water of ion exchange equipment, prolong the operation period and reduce the discharge of waste acid and waste alkali. In the operation process of the reverse osmosis system, as the water is continuously concentrated, the concentration of scale and salt in the water exceeds the saturation degree of the scale and salt, calcium silicate and composite scale are generated in the membrane, the water yield of the membrane system can be reduced, the pressure difference of the system is increased, and the water quality of the produced water is deteriorated. Calcium silicate and its composite scale are difficult to clean, insoluble in acid and alkali solution with conventional concentration, and can cause direct scrapping of the film in severe cases.
In systems with poor pretreatment, reverse osmosis membranes are gradually contaminated with inorganic substances, microorganisms, metal oxides, colloids and insoluble organic substances in the concentrate. After pollutants in water are deposited in a water flow channel of the membrane component, the water flow resistance is increased, the water yield is reduced, and the pressure drop is increased. The contaminants also plug the membrane pores and permeate the membrane under pressure into the fresh water, causing the quality of the fresh water to degrade. The reverse osmosis membrane scale is mainly carbonate scale, sulfate scale and silicate scale, and a small amount of iron-aluminum-silicon compounds exist, wherein the sulfate scale and the silicate scale are the most difficult to remove. The choice of reverse osmosis cleaning agent and cleaning method has important influence on the performance recovery and the expected life of the reverse osmosis membrane after pollution, so as to avoid long-term irreversible damage.
The existing treatment method is to wash calcium silicate and composite scale thereof by using high-concentration strong acid, but the high concentration of the acid can cause great secondary damage to a reverse osmosis membrane and metal equipment, and the membrane can be directly scrapped seriously; and the acid reacts with calcium silicate to generate colloidal silica, the property of the colloidal silica is closer to solid, the colloidal silica can be attached to the membrane surface to cause secondary pollution, new pollutants are formed and are difficult to clean, and the removal of calcium silicate scale is greatly influenced.
Based on the analysis, a cleaning agent which can remove calcium silicate and composite scale thereof through reaction, simultaneously prevent silicon cleaned from being deposited on a membrane surface for the second time and has no damage to a reverse osmosis membrane, a nanofiltration membrane and stainless steel equipment is urgently needed in the industry at present.
Disclosure of Invention
Disadvantages of existing calcium silicate and its composite scale cleaners include: strong acid has high corrosivity on reverse osmosis membranes, nanofiltration membranes and metal equipment; secondly, generating colloidal silica in the cleaning process to cause secondary pollution to the membrane; and thirdly, the colloidal silica is difficult to remove, and the cleaning of calcium silicate is seriously influenced. In view of the defects, the invention provides the cleaning agent, which can not only completely react calcium silicate and composite scales thereof and disperse the calcium silicate and the composite scales into a cleaning solution, but also prevent silicon cleaned from being deposited on a membrane surface for the second time, has the removal rate of the calcium silicate of more than 98 percent, and finally achieves the aim of zero damage to a reverse osmosis membrane, a nanofiltration membrane and stainless steel equipment. Meanwhile, the cleaning agent provided by the invention can be used for online or offline cleaning according to actual requirements.
The invention is realized by the following means:
a cleaning agent, comprising, in mass percent:
10-20% of a scale remover;
5-10% of a dispersant;
0.5-5% of a penetrant;
5-10% of cosolvent;
0.5-3% of a release agent; and
the balance is demineralized water.
Further, the scale remover is selected from any one or more of sulfamic acid, methanesulfonic acid and glycolic acid.
Further, the dispersant is any one selected from acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, carboxylic acid-sulfonic acid-acrylate terpolymer and maleic acid-acrylic acid copolymer.
Further, the penetrating agent is selected from any one of fatty alcohol-polyoxyethylene ether and sodium dioctyl sulfosuccinate.
Furthermore, the cosolvent is selected from any one of absolute ethyl alcohol or glycerol.
Further, the stripping agent is selected from any one of polyquaternium and dodecyl guanidine acetate.
The invention also discloses a method for preparing the cleaning agent, which comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
The invention also discloses a cleaning agent prepared by the preparation method.
The invention also discloses an application of the cleaning agent in calcium silicate scale pollution in reverse osmosis or nanofiltration membrane equipment.
Further, the application comprises the following methods:
in a cleaning water tank of reverse osmosis or nanofiltration membrane equipment, cleaning agent is prepared into cleaning liquid according to the mass concentration of 13-40%, the cleaning liquid is cleaned at normal temperature without heating, and the water for preparing the cleaning liquid is reverse osmosis produced water or desalted water. Adjusting the valve of the device to an online cleaning state, starting a cleaning pump to operate for 10-20min, detecting the pH value of the cleaning liquid after the cleaning liquid circulates uniformly in the system, and normally cleaning if the pH value is between 2-2.5; detecting the pH value and the silicon concentration of the cleaning solution every hour, and if the pH value is increased to be more than 2.5, supplementing the cleaning agent into the cleaning water tank until the pH value is between 2 and 2.5; if the pH value is stable and does not rise any more, and the silicon concentration is still rising, continuing to clean; and finishing the cleaning until the pH value of the cleaning solution is stabilized between 2 and 2.5 and the silicon concentration is not increased any more.
The invention has the beneficial effects that:
1. the cleaning agent prepared by the invention is used for cleaning reverse osmosis and nanofiltration membrane calcium silicate and composite scale thereof, so that the problem that the traditional strong acid cleaning has high corrosivity on the reverse osmosis membrane, the nanofiltration membrane and metal equipment is effectively solved; the cleaning process generates colloidal silica, which causes secondary pollution to the membrane; the colloidal silica is difficult to remove, and the cleaning of calcium silicate is seriously influenced. The method realizes the purposes that calcium silicate and composite scale thereof are completely reacted and dispersed in the cleaning solution, silicon cleaned cannot be deposited on the film surface for the second time, and the removal rate of the calcium silicate is more than 98%.
2. The cleaning agent prepared by the invention can not excessively clean the membrane due to more dosage or long cleaning time, and finally achieves the effect of zero damage to reverse osmosis membranes, nanofiltration membranes and stainless steel equipment.
3. The cleaning agent provided by the invention can be used for online or offline cleaning according to actual requirements. Has good application value and prospect.
Detailed Description
Example 1
Cleaning agent
10% of scale remover, 5% of dispersant, 0.5% of penetrating agent, 5% of cosolvent, 0.5% of stripping agent and the balance of demineralized water.
The scale remover is prepared by mixing sulfamic acid and methanesulfonic acid in equal proportion.
The dispersant is acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.
The penetrating agent is fatty alcohol-polyoxyethylene ether.
The cosolvent is absolute ethyl alcohol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 2
Cleaning agent
11% of a scale remover, 6% of a dispersant, 1% of a penetrating agent, 6% of a cosolvent, 1% of a stripping agent and the balance of demineralized water.
The scale remover is prepared by mixing sulfamic acid, methanesulfonic acid and glycolic acid according to the ratio of 5:3: 3.
The dispersant is acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.
The penetrating agent is fatty alcohol-polyoxyethylene ether.
The cosolvent is glycerol.
The stripping agent is dodecyl guanidine acetate.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 3
Cleaning agent
12% of scale remover, 7% of dispersant, 1.5% of penetrating agent, 7% of cosolvent, 1.5% of stripping agent and the balance of demineralized water.
The scale remover is mixture of sulfamic acid and glycolic acid in equal proportion.
The dispersant is maleic acid-acrylic acid copolymer.
The penetrating agent is sodium dioctyl sulfosuccinate.
The cosolvent is absolute ethyl alcohol.
The stripping agent is dodecyl guanidine acetate.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 4
Cleaning agent
13% of a descaling agent, 8% of a dispersing agent, 2% of a penetrating agent, 8% of a cosolvent, 2% of a stripping agent and the balance of demineralized water.
The scale remover is glycolic acid.
The dispersant is maleic acid-acrylic acid copolymer.
The penetrating agent is sodium dioctyl sulfosuccinate.
The cosolvent is absolute ethyl alcohol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 5
Cleaning agent
14% of scale remover, 9% of dispersant, 2.5% of penetrating agent, 9% of cosolvent, 2.5% of stripping agent and the balance of demineralized water.
The scale remover is mixture of methanesulfonic acid and glycolic acid in equal proportion.
The dispersant is carboxylic acid-sulfonic acid-acrylate terpolymer.
The penetrating agent is fatty alcohol-polyoxyethylene ether.
The cosolvent is absolute ethyl alcohol.
The stripping agent is dodecyl guanidine acetate.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 6
Cleaning agent
15% of a scale remover, 10% of a dispersant, 3% of a penetrating agent, 10% of a cosolvent, 3% of a stripping agent and the balance of demineralized water.
The scale remover is prepared by mixing sulfamic acid, methanesulfonic acid and glycolic acid according to the ratio of 7:4: 4.
The dispersant is acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.
The penetrating agent is fatty alcohol-polyoxyethylene ether.
The cosolvent is glycerol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 7
Cleaning agent
16% of scale remover, 9% of dispersant, 2.5% of penetrating agent, 9% of cosolvent, 2.5% of stripping agent and the balance of demineralized water.
The scale remover is mixture of methanesulfonic acid and glycolic acid in equal proportion.
The dispersant is carboxylic acid-sulfonic acid-acrylate terpolymer.
The penetrating agent is sodium dioctyl sulfosuccinate.
The cosolvent is absolute ethyl alcohol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 8
Cleaning agent
17% of a scale remover, 8% of a dispersant, 2% of a penetrating agent, 8% of a cosolvent, 2% of a stripping agent and the balance of demineralized water.
The scale remover is prepared by mixing sulfamic acid, methanesulfonic acid and glycolic acid according to the ratio of 8:5: 4.
The dispersant is maleic acid-acrylic acid copolymer.
The penetrating agent is sodium dioctyl sulfosuccinate.
The cosolvent is glycerol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 9
Cleaning agent
18% of scale remover, 7% of dispersant, 1.5% of penetrating agent, 7% of cosolvent, 1.5% of stripping agent and the balance of desalted water.
The scale remover is mixture of methanesulfonic acid and glycolic acid in equal proportion.
The dispersant is acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.
The penetrating agent is fatty alcohol-polyoxyethylene ether.
The cosolvent is absolute ethyl alcohol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 10
Cleaning agent
19% of a scale remover, 6% of a dispersant, 1% of a penetrating agent, 6% of a cosolvent, 1% of a stripping agent and the balance of demineralized water.
The scale remover is prepared by mixing sulfamic acid, methanesulfonic acid and glycolic acid according to the ratio of 9:6: 4.
The dispersant is maleic acid-acrylic acid copolymer.
The penetrating agent is sodium dioctyl sulfosuccinate.
The cosolvent is glycerol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Example 11
Cleaning agent
20% of a descaling agent, 5% of a dispersing agent, 0.5% of a penetrating agent, 5% of a cosolvent, 0.5% of a stripping agent and the balance of demineralized water.
The scale remover is mixture of sulfamic acid and glycolic acid in equal proportion.
The dispersant is carboxylic acid-sulfonic acid-acrylate terpolymer.
The penetrating agent is sodium dioctyl sulfosuccinate.
The cosolvent is absolute ethyl alcohol.
The stripping agent is polyquaternium.
A preparation method of the cleaning agent comprises the following steps:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
Application examples
In a cleaning water tank of reverse osmosis or nanofiltration membrane equipment, the cleaning solution is prepared by the medicament according to the mass concentration of 13-40%, the cleaning solution is cleaned at normal temperature without heating, and the water for preparing the cleaning solution is reverse osmosis produced water or desalted water. Adjusting the valve of the device to an online cleaning state, starting a cleaning pump to operate for 10-20min, detecting the pH value of the cleaning liquid after the cleaning liquid circulates uniformly in the system, and normally cleaning if the pH value is between 2-2.5; detecting the pH value and the silicon concentration of the cleaning solution every hour, and if the pH value is increased to be more than 2.5, supplementing the cleaning agent into the cleaning water tank until the pH value is between 2 and 2.5; if the pH value is stable and does not rise any more, and the silicon concentration is still rising, continuing to clean; and finishing the cleaning until the pH value of the cleaning solution is stabilized between 2 and 2.5 and the silicon concentration is not increased any more. The washing time is generally 2 to 16 hours.
Test example 1
The cleaning agents obtained in examples 1 to 11 were prepared into 100g of cleaning solution with demineralized water at 13% by mass, 27% by mass and 40% by mass, and 0.5g of calcium silicate was dissolved by stirring at 10 ℃ and 35 ℃ respectively. The complete dissolution time of the calcium silicate was observed and the test results are shown in table 1 below:
TABLE 1 comparison of the dissolution times (unit: h) of the calcium silicate scales at different concentrations of the agent and temperatures for the respective groups of examples
As is clear from the results in Table 1, the time required for complete dissolution of calcium silicate was the fastest in examples 11, which were the detergents prepared in examples 1 to 11, at a temperature of 10 ℃ and 35 ℃ and at a detergent concentration of 40%. The scale remover accounts for a large amount of the cleaning agent, and the dissolving speed of the calcium silicate scale is higher when the scale remover accounts for a larger amount of the cleaning agent. The temperature has little influence on the dissolution rate of the calcium silicate.
Test examples
Liaoning energy company, 3 sets of first-level reverse osmosis membranes and 216 reverse osmosis membranes in a single set, and the designed water yield is 160m3H is used as the reference value. The reverse osmosis equipment is operated for one year, and the water yield of the membrane system is reduced to 116m3And/h, the pressure difference of the second section is increased from 0.07MPa at the initial stage of operation to 0.26MPa, and the online cleaning effect is poor. The online operating data is shown in table 2:
TABLE 2
The last membrane of the two sections is detached, the water in the membrane is drained and weighed, the weight of the single membrane is increased from 13-13.5 kg of the new membrane to 15-16kg, and more than 87% of the scale samples are analyzed to be calcium silicate scale. A total of 72 second-stage membranes were removed and offline-cleaned, and a 25% strength cleaning solution was prepared according to example 9, and the membrane elements were cleaned for 8 hours. The data after washing before and after selecting 6 membrane elements are shown in table 3:
TABLE 3
After the 72 reverse osmosis membranes are cleaned, all the reverse osmosis membranes are installed back to the equipment, and the online operation data after the system is cleaned is shown in table 4:
TABLE 4
As can be seen from the data in tables 2 to 4, after the calcium silicate scaling reverse osmosis membrane is cleaned by using the cleaning agent prepared in example 9, the weight of the membrane element is basically recovered to the state of a new membrane (13 to 13.5 kilograms of the new membrane), the water yield of the membrane system is improved by 36.2 percent compared with that before cleaning, the differential pressure is reduced by 69.2 percent, the desalination rate of the system is improved by 0.53 percent, and the normal use is recovered. The cleaning agent has better effect of removing calcium silicate scale.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (10)
1. A cleaning agent, comprising, in mass percent:
10-20% of a scale remover;
5-10% of a dispersant;
0.5-5% of a penetrant;
5-10% of cosolvent;
0.5-3% of a release agent; and
the balance is demineralized water.
2. The cleaning agent according to claim 1, wherein:
the scale remover is selected from one or more of sulfamic acid, methanesulfonic acid and glycolic acid.
3. The cleaning agent according to claim 1, wherein:
the dispersing agent is any one of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, carboxylic acid-sulfonic acid-acrylate terpolymer and maleic acid-acrylic acid copolymer.
4. The cleaning agent according to claim 1, wherein:
the penetrating agent is selected from any one of fatty alcohol-polyoxyethylene ether and sodium dioctyl sulfosuccinate.
5. The cleaning agent according to claim 1, wherein:
the cosolvent is selected from any one of absolute ethyl alcohol or glycerol.
6. The cleaning agent according to claim 1, wherein:
the stripping agent is selected from one of polyquaternium and dodecyl guanidine acetate.
7. A method of making a cleaning formulation as claimed in any one of claims 1 to 6 comprising:
adding 80% of demineralized water into the scale remover, and stirring for dissolving to obtain a first product for later use;
adding a dispersant into the first product, and uniformly stirring to obtain a second product for later use;
mixing and stirring the penetrating agent and the cosolvent uniformly to obtain a third product for later use;
adding the third product into the second product, and uniformly stirring to obtain a fourth product for later use;
adding the stripping agent into the fourth product, supplementing the residual desalted water, and uniformly stirring to obtain the product.
8. A cleaning agent prepared by the preparation method of claim 7.
9. Use of a cleaning agent according to claims 1-6 or 8 for calcium silicate scale contamination in reverse osmosis or nanofiltration membrane equipment.
10. The use according to claim 9, comprising:
in a cleaning water tank of reverse osmosis or nanofiltration membrane equipment, preparing cleaning fluid by using a cleaning agent according to the mass concentration of 13-40%; adjusting the equipment valve to an online cleaning state, starting a cleaning pump to operate for 10-20min, and uniformly circulating the cleaning liquid in the system;
detecting the pH value of the cleaning solution, and if the pH value is between 2 and 2.5, normally cleaning; detecting the pH value and the silicon concentration of the cleaning solution every hour, and if the pH value is increased to be more than 2.5, supplementing the cleaning agent into the cleaning water tank until the pH value is between 2 and 2.5; if the pH value is stable and does not rise any more, and the silicon concentration is still rising, continuing to clean; and finishing the cleaning until the pH value of the cleaning solution is stabilized between 2 and 2.5 and the silicon concentration is not increased any more.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357254A (en) * | 1981-01-12 | 1982-11-02 | Chemical Sciences, Inc. | Cleaning composition |
| CN103242986A (en) * | 2013-04-16 | 2013-08-14 | 太仓市宝马环境工程有限公司 | Calcium sulfate scale cleaning agent and preparation method thereof |
| CN105950308A (en) * | 2016-05-23 | 2016-09-21 | 山东英联化学科技有限公司 | Cleaning agent applied to silicate scales and preparation method of cleaning agent |
| CN106590947A (en) * | 2016-11-14 | 2017-04-26 | 武汉宜田科技发展有限公司 | Diamond wire cutting machine tool internal detergent |
| CN111171965A (en) * | 2020-01-20 | 2020-05-19 | 安徽建筑大学 | Multifunctional composite cleaning solution for operation cleaning |
| CN111437728A (en) * | 2020-05-22 | 2020-07-24 | 新疆水处理工程技术研究中心有限公司 | Reverse osmosis special-purpose pickling cleaning agent and preparation method thereof |
-
2021
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357254A (en) * | 1981-01-12 | 1982-11-02 | Chemical Sciences, Inc. | Cleaning composition |
| CN103242986A (en) * | 2013-04-16 | 2013-08-14 | 太仓市宝马环境工程有限公司 | Calcium sulfate scale cleaning agent and preparation method thereof |
| CN105950308A (en) * | 2016-05-23 | 2016-09-21 | 山东英联化学科技有限公司 | Cleaning agent applied to silicate scales and preparation method of cleaning agent |
| CN106590947A (en) * | 2016-11-14 | 2017-04-26 | 武汉宜田科技发展有限公司 | Diamond wire cutting machine tool internal detergent |
| CN111171965A (en) * | 2020-01-20 | 2020-05-19 | 安徽建筑大学 | Multifunctional composite cleaning solution for operation cleaning |
| CN111437728A (en) * | 2020-05-22 | 2020-07-24 | 新疆水处理工程技术研究中心有限公司 | Reverse osmosis special-purpose pickling cleaning agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 钱应璞编著: "《制药用水系统设计与实践》", 北京：化学工业出版社, pages: 283 - 284 * |
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