CN103512239A - Panel solar water heater water scale cleaning method - Google Patents
Panel solar water heater water scale cleaning method Download PDFInfo
- Publication number
- CN103512239A CN103512239A CN201210212890.3A CN201210212890A CN103512239A CN 103512239 A CN103512239 A CN 103512239A CN 201210212890 A CN201210212890 A CN 201210212890A CN 103512239 A CN103512239 A CN 103512239A
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- China
- Prior art keywords
- washing
- water heater
- water
- cleaning method
- scale cleaning
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Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a panel solar water heater water scale cleaning method. The panel solar water heater water scale cleaning method comprises the step of primary water washing, acid washing, alkali washing and secondary water washing. The primary water washing is that water flowing at the speed of 5-10m/s is used for washing thermal collection components of a water heater for 30-50min. The acid washing is that an acid pickling solution with the pH value being 3-4 is used for washing. The alkali washing is that mixed liquor of NaOH and Na3PO4 is used for washing until the pH value of the output water becomes 7-7.5, wherein the molar ratio of the NaOH to the Na3PO4 is 1: 1. The secondary water washing is that the water flowing at the speed of 2-3m/s is used for washing for 15-20min. When the solar water heater is cleaned through the method, the heat exchanging capability of the water heater can be recovered after the acid pickling solution washes the thermal collection components. The passivating treatment carried out after washing enables the surface of a metal material to form an oxidation thin film layer, and further corrosion is avoided.
Description
Technical field
The present invention relates to a kind of water heater clean method, particularly relate to a kind of flat plate solar water heater incrustation scale cleaning method.
Background technology
Solar water heater is the major way that current domestic solar energy utilizes, and solar water heater consumption is increasing.Flat solar water heater's heat-collecting part operating temperature is 75 ℃ of left and right, wherein velocity of water circulation is lower, in such working environment, current mineral easily forms incrustation scale at parts inwall, affect heat-collecting part tube wall heat conduction efficiency, make working medium heat exchange poor, thereby the whole solar water heater efficiency of heating surface is low, when running into as weather conditions such as cloudy day, rainy days, outlet hot water cannot meet user demand.
Summary of the invention
The object of this invention is to provide a kind of flat plate solar water heater incrustation scale cleaning method, to solve, solar water heater is long-term uses rear heat-collecting part to produce incrustation scale, affects the problem of parts heat transfer effect.
Technical scheme of the present invention is such: a kind of flat plate solar water heater incrustation scale cleaning method, comprise step: washing for the first time, pickling, alkali cleaning and washing for the second time, it is characterized in that: described washing is for the first time for adopting 5-10m/s current to rinse water heater heat-collecting part 30-50min, described pickling is for adopting the pickle that pH value is 3-4 to clean, and described alkali cleaning is for adopting NaOH and Na
3pO
4the mol ratio mixed liquor of 1: 1 cleans to going out water ph value 7-7.5, and washing is for the second time for adopting 2-3m/s current to rinse 15-20min.
In order to reach preferably cleaning performance, described pickle is composed of the following components, and every 20L water contains technical hydrochloric acid 100ml, ammonium hydrogencarbonate 95-100g, ammonium citrate 16-18g, the anticorrosion slow agent 4-5g that executes.
Preferably, described anticorrosion slow one or more in TPR1-6EDTA, HKNT-I, HKNT-I of agent of executing form.
After pickling, the original oxide-film in metal surface also may be dissolved by acid, make metal be naked state, this is unfavorable for that water heater is long-term operating anticorrosion, flat plate solar water heater incrustation scale cleaning method, after described water-washing step for the second time, carry out Passivation Treatment, described Passivation Treatment is that after water heater is filled with water, lucifuge is deposited 1.5-2.5h.
The advantage of technical scheme provided by the present invention is, pickle can recovery heat hydrophone exchange capability of heat after cleaning heat-collecting part.Passivation Treatment after cleaning, makes metal surface form oxide film layer, avoids further corrosion.
The specific embodiment
Below in conjunction with embodiment, the invention will be further described, but not as a limitation of the invention.
In solar water heater, the main component of incrustation scale is calcium carbonate CaCO3, magnesium carbonate MgCO3 etc., and these compositions can dissolve formation soluble-salt under acid condition, just can go out to come off from fouling, reach cleaning object.The chemical reaction relating generally in cleaning is:
CaCO
3+2H
+=Ca
2++H
2O+CO
2↑
MgCO
3+2H
+=Mg
2++H
2O+CO
2↑
According to 20L water, 100mL technical hydrochloric acid, 96g ammonium hydrogencarbonate, 17g ammonium citrate and 4gTPR1-6EDTA configuration pickle.The concrete steps of cleaning are, first water heater are carried out to clear water flushing, and a water pump is installed in water heater one end, make water velocity reach 8m/s, clean 40min, and this step is mainly mud impurity etc. in clear pipe.Then carry out pickling, the pickle configuring is added to water tank for water-heater, control pH value 3-4, can suitably supplement hydrochloric acid stable to maintain pH value in cleaning process, when eluate hardness is relatively stable, surperficial incrustation scale is substantially clear totally can finish pickling.After pickling, adopt NaOH and Na
3pO
4the mol ratio mixed liquor of 1: 1 cleans to going out water ph value 7-7.5, reaches acid-base neutralization.Finally with the clear water of 2.5m/s, wash for the second time 15min, help to get rid of residual night of soda acid and clean residue.After pickling, oxidation on metal surface layer is dissolved, and exposed metal/bare metal is in working medium, the air dissolving in working medium easily causes degree of depth corrosion to it, therefore, and after having washed for the second time, carry out Passivation Treatment, for water heater, fill with after water lucifuge and deposit 2h，Dai metal surface and form oxide passivation layer film.
Claims (4)
1. a flat plate solar water heater incrustation scale cleaning method, comprise step: washing for the first time, pickling, alkali cleaning and washing for the second time, it is characterized in that: described washing is for the first time for adopting 5-10m/s current to rinse water heater heat-collecting part 30-50min, described pickling is for adopting the pickle that pH value is 3-4 to clean, and described alkali cleaning is for adopting NaOH and Na
3pO
4the mol ratio mixed liquor of 1: 1 cleans to going out water ph value 7-7.5, and washing is for the second time for adopting 2-3m/s current to rinse 15-20min.
2. flat plate solar water heater incrustation scale cleaning method according to claim 1, is characterized in that: described pickle is composed of the following components, and every 20L water contains technical hydrochloric acid 100ml, ammonium hydrogencarbonate 95-100g, ammonium citrate 16-18g, the anticorrosion slow agent 4-5g that executes.
3. flat plate solar water heater incrustation scale cleaning method according to claim 2, is characterized in that: described anticorrosion slow one or more in TPR1-6EDTA, HKNT-I, HKNT-II of agent of executing form.
4. flat plate solar water heater incrustation scale cleaning method according to claim 1, is characterized in that: after described water-washing step for the second time, carry out Passivation Treatment, described Passivation Treatment is that after water heater is filled with water, lucifuge is deposited 1.5-2.5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210212890.3A CN103512239A (en) | 2012-06-26 | 2012-06-26 | Panel solar water heater water scale cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210212890.3A CN103512239A (en) | 2012-06-26 | 2012-06-26 | Panel solar water heater water scale cleaning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103512239A true CN103512239A (en) | 2014-01-15 |
Family
ID=49895372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210212890.3A Pending CN103512239A (en) | 2012-06-26 | 2012-06-26 | Panel solar water heater water scale cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103512239A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841206A (en) * | 2014-02-19 | 2015-08-19 | 东莞新科技术研究开发有限公司 | Filter screen cleaning method |
| CN105215010A (en) * | 2015-08-27 | 2016-01-06 | 江西铜业股份有限公司 | A kind of equipment inner chamber incrustation scale cleaning machine and cleaning |
| CN108673821A (en) * | 2018-07-03 | 2018-10-19 | 厦门市松竹精密科技有限公司 | Automatic die water route wiper mechanism |
-
2012
- 2012-06-26 CN CN201210212890.3A patent/CN103512239A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841206A (en) * | 2014-02-19 | 2015-08-19 | 东莞新科技术研究开发有限公司 | Filter screen cleaning method |
| CN105215010A (en) * | 2015-08-27 | 2016-01-06 | 江西铜业股份有限公司 | A kind of equipment inner chamber incrustation scale cleaning machine and cleaning |
| CN108673821A (en) * | 2018-07-03 | 2018-10-19 | 厦门市松竹精密科技有限公司 | Automatic die water route wiper mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140115 |