CN111229048A - Chemical cleaning agent for reverse osmosis device and cleaning method thereof - Google Patents
Chemical cleaning agent for reverse osmosis device and cleaning method thereof Download PDFInfo
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- CN111229048A CN111229048A CN202010046761.6A CN202010046761A CN111229048A CN 111229048 A CN111229048 A CN 111229048A CN 202010046761 A CN202010046761 A CN 202010046761A CN 111229048 A CN111229048 A CN 111229048A
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- cleaning
- reverse osmosis
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- hydrochloric acid
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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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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a chemical cleaning agent for a reverse osmosis device and a cleaning method thereof, which comprises the steps of preparing 0.1-0.3% hydrochloric acid solution, wherein the pH value of the hydrochloric acid solution is 1-4, and the temperature of the hydrochloric acid solution is 30-40 ℃. The reverse osmosis device cleaning steps are as follows: 1. preparing a cleaning solution; 2. opening a circulating valve for enabling the concentrated water and the produced water to enter the cleaning box, closing a concentrated water blowdown valve and a water production valve for enabling the produced water to enter the pure water box, and opening a water inlet valve between the cleaning box and the cleaning pump; 3. adjusting the electric appliance control to a manual gear and starting a cleaning pump for circular cleaning; 4. observing the water quality condition in the cleaning water tank; 5. after the cleaning is finished, the cleaning solution is drained and the membrane is cleaned; 6. opening a concentrated water blowdown valve and a produced water blowdown valve; 7. and (5) discharging sewage and cleaning. The reverse osmosis membrane cleaning device is not easy to damage the reverse osmosis membrane, has a good cleaning effect, improves the water purifying effect in the water purifying process, and effectively prolongs the service life of the reverse osmosis membrane.
Description
Technical Field
The invention relates to a cleaning solution, in particular to a chemical cleaning agent for a reverse osmosis device and a cleaning method thereof.
Background
In the water purifying equipment, the reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics and made by simulating a biological semipermeable membrane, and is a core component of the reverse osmosis technology. The principle of reverse osmosis is that under the action of the osmotic pressure higher than that of the solution, other substances are separated from water based on the fact that the substances cannot permeate a semipermeable membrane. The reverse osmosis membrane has a very small membrane pore size, and thus can effectively remove dissolved salts, colloids, organic substances, microorganisms, and the like in water.
After a user uses the water purifying equipment for a period of time, substances such as colloid, metal oxide, bacteria, organic matters or water scale and the like can be accumulated on the concentrated water side of the reverse osmosis membrane, so that the reverse osmosis membrane is blocked, and the problems of reduction of desalination rate, reduction of water yield, increase of differential pressure and the like of a system are caused. Therefore, the reverse osmosis membrane needs to be cleaned in time. The reverse osmosis membrane cannot be thoroughly cleaned by using the traditional cleaning method and cleaning liquid, and is easy to damage.
Disclosure of Invention
The invention provides a chemical cleaning agent for a reverse osmosis device and a cleaning method thereof, which aim to overcome the defects of the related technology.
In order to solve the relevant problems, the invention adopts the following technical scheme:
a chemical cleaning agent for a reverse osmosis device comprises 0.1% -0.3% hydrochloric acid solution, wherein the PH value of the hydrochloric acid solution is 1-4, and the temperature of the hydrochloric acid solution is 30-40 ℃.
The scheme further comprises the following steps:
the hydrochloric acid solution was prepared at 0.2%.
The scheme further comprises the following steps:
the pH value of the hydrochloric acid solution is 2-3.
The scheme further comprises the following steps:
the temperature of the hydrochloric acid solution was 35 ℃.
The scheme further comprises the following steps:
a chemical cleaning agent for a reverse osmosis device and a cleaning method thereof comprise the following steps:
s1, preparing cleaning solution;
s2, opening a circulating valve of the cleaning box for the concentrated water and the produced water, closing a concentrated water blowdown valve and a produced water valve of the pure water box for the produced water, and opening a water inlet valve between the cleaning box and the cleaning pump;
s3, adjusting the electric appliance control to a manual gear and starting a cleaning pump for circular cleaning;
s4, observing the water quality in the washing water tank;
s5, draining the cleaning solution after cleaning and carrying out membrane cleaning;
s6, opening a concentrated water blowdown valve and a produced water blowdown valve;
and S7, blowdown and cleaning.
The scheme further comprises the following steps:
the step S1 includes preparing the required items for cleaning solution preparation and preparing the cleaning solution.
The scheme further comprises the following steps:
the time for circulating cleaning in the S3 is 1-2 hours.
The scheme further comprises the following steps:
and the time for in-film cleaning in the S5 is 1-2 hours.
The scheme further comprises the following steps:
and the time for cleaning the sewage in the S7 is 1-2 hours.
The scheme further comprises the following steps:
the cleaning method is used for carrying out chemical cleaning on the reverse osmosis device when the water production flow and the water quality are reduced by 10-15% compared with the previous cleaning or the pressure difference of the reverse osmosis device is increased by 10-15% compared with the last cleaning.
The invention has the following beneficial effects:
the reverse osmosis membrane cleaning device is not easy to damage the reverse osmosis membrane, has a good cleaning effect, improves the water purifying effect in the water purifying process, and effectively prolongs the service life of the reverse osmosis membrane.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to ensure the normal operation of the reverse osmosis device and prolong the service life of elements, when the water production flow and the water quality are reduced by 10 to 15 percent compared with the last cleaning, or the pressure difference of the reverse osmosis device is increased by 10 to 15 percent compared with the pressure difference after the last cleaning, the reverse osmosis device is chemically cleaned.
Embodiment mode 1:
the cleaning solution is hydrochloric acid solution, the hydrochloric acid solution is prepared to be 0.2%, the pH value of the hydrochloric acid solution is 2-3, and the optimal temperature of the hydrochloric acid solution is 35 ℃.
Preparing a hydrochloric acid solution:
1. preparing cleaning articles: 2 bottles of hydrochloric acid (500 g/bottle), 100 kg of purified water (ozone-added purified water is forbidden) and 1 bag of pH test paper.
2. Firstly, calculating the weight of two thirds of cleaning water stored in a cleaning box, blending the cleaning water with purified water according to a proportion, fully stirring the cleaning water to be completely dissolved, pouring the cleaning water into the cleaning box to prepare 0.2% hydrochloric acid solution, testing the pH of the hydrochloric acid solution to be about 1-2 by using a pH (1-14) test paper to a standard value of 2-3, and preferably keeping the temperature of the cleaning liquid at 35-40 ℃.
Embodiment mode 2:
the cleaning solution is a mixed solution of sodium hydroxide and sodium dodecyl benzene sulfonate, the mixed solution is prepared from 0.1 percent of sodium hydroxide and 0.025 percent of sodium dodecyl benzene sulfonate, the pH value of the mixed solution is 12, and the optimal temperature of the mixed solution is 30 ℃.
Preparing a mixed solution:
1. preparing cleaning articles: 2 bottles of sodium hydroxide (500 g/bottle), 2 bottles of sodium dodecyl benzene sulfonate (500 g/bottle), 100 kg of purified water (ozone-added purified water is forbidden) and 1 bag of pH test paper.
2. Firstly, calculating the weight of two thirds of cleaning water stored in a cleaning box, blending the cleaning water with purified water according to a proportion, fully stirring the cleaning water to be completely dissolved, pouring the cleaning water into the cleaning box to prepare a mixed solution of 0.1 percent of sodium hydroxide and 0.025 percent of sodium dodecyl benzene sulfonate, testing the pH of the mixed solution to be about 12-13 by using a pH (1-14) test paper at the same time until the standard value is 12, and preferably, keeping the temperature of the cleaning liquid at 30-35 ℃.
The chemical cleaning method of the reverse osmosis device comprises the following steps:
1. a cleaning solution is prepared.
2. Opening a circulating valve for enabling the concentrated water and the produced water to enter the cleaning box, closing a concentrated water blowdown valve and a produced water valve for enabling the produced water to enter the pure water box, and opening a water inlet valve between the cleaning box and the cleaning pump.
3. And (4) controlling the electric appliance to be adjusted to a manual gear, and starting a cleaning pump to perform circular cleaning for 1-2 hours.
4. And observing the water quality condition in the cleaning water tank.
5. And after the cleaning is finished, discharging the cleaning solution and performing intra-membrane cleaning, wherein the time for intra-membrane cleaning is 1-2 hours.
6. Opening a concentrated water blowdown valve and a produced water blowdown valve, and performing blowdown and cleaning for 1-2 hours.
7. And (5) discharging sewage and cleaning.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. A chemical cleaning agent for a reverse osmosis device is characterized in that: the method comprises the steps of preparing 0.1-0.3% hydrochloric acid solution, wherein the pH value of the hydrochloric acid solution is 1-4, and the temperature of the hydrochloric acid solution is 30-40 ℃.
2. A chemical cleaning agent for a reverse osmosis apparatus according to claim 1, wherein: the hydrochloric acid solution was prepared at 0.2%.
3. A chemical cleaning agent for a reverse osmosis apparatus according to claim 1, wherein: the pH value of the hydrochloric acid solution is 2-3.
4. A chemical cleaning agent for a reverse osmosis apparatus according to claim 1, wherein: the temperature of the hydrochloric acid solution was 35 ℃.
5. A chemical cleaning agent for a reverse osmosis device and a cleaning method thereof according to any one of claims 1 to 4, characterized by comprising the following steps:
s1, preparing cleaning solution;
s2, opening a circulating valve of the cleaning box for the concentrated water and the produced water, closing a concentrated water blowdown valve and a produced water valve of the pure water box for the produced water, and opening a water inlet valve between the cleaning box and the cleaning pump;
s3, adjusting the electric appliance control to a manual gear and starting a cleaning pump for circular cleaning;
s4, observing the water quality in the washing water tank;
s5, draining the cleaning solution after cleaning and carrying out membrane cleaning;
s6, opening a concentrated water blowdown valve and a produced water blowdown valve;
and S7, blowdown and cleaning.
6. A chemical cleaning agent for a reverse osmosis device and a cleaning method thereof according to claim 5, wherein the chemical cleaning agent comprises: the step S1 includes preparing the required items for cleaning solution preparation and preparing the cleaning solution.
7. A chemical cleaning agent for a reverse osmosis device and a cleaning method thereof according to claim 5, wherein the chemical cleaning agent comprises: the time for circulating cleaning in the S3 is 1-2 hours.
8. A chemical cleaning agent for a reverse osmosis device and a cleaning method thereof according to claim 5, wherein the chemical cleaning agent comprises: and the time for in-film cleaning in the S5 is 1-2 hours.
9. A chemical cleaning agent for a reverse osmosis device and a cleaning method thereof according to claim 5, wherein the chemical cleaning agent comprises: and the time for cleaning the sewage in the S7 is 1-2 hours.
10. A chemical cleaning agent for a reverse osmosis apparatus and a cleaning method thereof according to claims 5 to 9, wherein the chemical cleaning agent comprises: the cleaning method is used for carrying out chemical cleaning on the reverse osmosis device when the water production flow and the water quality are reduced by 10-15% compared with the previous cleaning or the pressure difference of the reverse osmosis device is increased by 10-15% compared with the last cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010046761.6A CN111229048A (en) | 2020-01-16 | 2020-01-16 | Chemical cleaning agent for reverse osmosis device and cleaning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010046761.6A CN111229048A (en) | 2020-01-16 | 2020-01-16 | Chemical cleaning agent for reverse osmosis device and cleaning method thereof |
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| Publication Number | Publication Date |
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| CN111229048A true CN111229048A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010046761.6A Pending CN111229048A (en) | 2020-01-16 | 2020-01-16 | Chemical cleaning agent for reverse osmosis device and cleaning method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102210978A (en) * | 2011-03-14 | 2011-10-12 | 四川科伦药业股份有限公司 | Method and reagent for cleaning and repairing discarded reverse osmosis film in offline mode |
| CN103657428A (en) * | 2013-12-17 | 2014-03-26 | 苏潮宁 | Membrane cleaning technology |
| CN105214507A (en) * | 2015-11-12 | 2016-01-06 | 师宗煤焦化工有限公司 | The cleaning method of reverse-osmosis membrane element |
| CN105753105A (en) * | 2016-05-12 | 2016-07-13 | 焦会良 | Polluting and plugging cause analysis and determination method for reverse osmosis system in reuse process of circulating water effluent of power plant and chemical cleaning method |
-
2020
- 2020-01-16 CN CN202010046761.6A patent/CN111229048A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102210978A (en) * | 2011-03-14 | 2011-10-12 | 四川科伦药业股份有限公司 | Method and reagent for cleaning and repairing discarded reverse osmosis film in offline mode |
| CN103657428A (en) * | 2013-12-17 | 2014-03-26 | 苏潮宁 | Membrane cleaning technology |
| CN105214507A (en) * | 2015-11-12 | 2016-01-06 | 师宗煤焦化工有限公司 | The cleaning method of reverse-osmosis membrane element |
| CN105753105A (en) * | 2016-05-12 | 2016-07-13 | 焦会良 | Polluting and plugging cause analysis and determination method for reverse osmosis system in reuse process of circulating water effluent of power plant and chemical cleaning method |
Non-Patent Citations (1)
| Title |
|---|
| 杨宗发: "《药物制剂设备》", 30 April 2012, 人民军医出版社 * |
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Application publication date: 20200605 |