CN111396853A - Descaling method for steam boiler - Google Patents
Descaling method for steam boiler Download PDFInfo
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- CN111396853A CN111396853A CN202010282373.8A CN202010282373A CN111396853A CN 111396853 A CN111396853 A CN 111396853A CN 202010282373 A CN202010282373 A CN 202010282373A CN 111396853 A CN111396853 A CN 111396853A
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- steam boiler
- boiler
- descaling
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- side wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
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Abstract
The invention discloses a descaling method for a steam boiler, which comprises the following steps: A. firstly, cooling a steam boiler to a room temperature state; B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler; C. simultaneously, spraying a descaling agent on the side wall of the steam boiler; D. then slowly heating the steam boiler to 40-50 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir; E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid; F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing for 3-5min each time, and repeatedly washing for 3 times; G. and finally, spraying a lubricant to the side wall of the boiler, wherein the descaling method adopted by the invention is simple to operate, can realize quick treatment of the scale in the boiler, and does not damage the side wall of the boiler in the descaling process.
Description
Technical Field
The invention relates to the technical field of boiler descaling, in particular to a descaling method for a steam boiler.
Background
Steam boilers, during the heating of water, develop hard, dense scale on the heated surfaces, particularly on the heated tubes, which can have many undesirable effects and which are difficult to remove. In the related art, in order to clean the scale in the boiler, the steam boiler needs to be disassembled, or the boiler needs to be cleaned by a chemical descaling agent and a brush through a physical machine, such cleaning is time-consuming and labor-consuming, and the cleaning is not clean, some dead corners or corners can not be cleaned, and in addition, most of the chemical cleaning agents are strong acids, the corrosion to the boiler body of the steam boiler is serious, the operation is not safe, and the environment is polluted, so that the descaling method needs to be improved.
Disclosure of Invention
The present invention is directed to a method for descaling a steam boiler to solve the above problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme: a steam boiler descaling method, comprising the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 40-50 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing for 3-5min each time, and repeatedly washing for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
Preferably, the components of the scale remover in the step B comprise, by weight, 4-8 parts of hydroxyethylidene acid, 4-10 parts of sodium nitrate, 3-9 parts of sodium hydroxide, 2-4 parts of sodium hypochlorite, 5-10 parts of acetic acid, 4-8 parts of citric acid, 3-9 parts of laurinol polyoxyethylene ether and 1-3 parts of a corrosion inhibitor.
Preferably, the rotation speed of the stirring motor in the step D is 1000-2000 rpm, the mixture is stirred for 5-8min and then is kept stand for 10min, and then is stirred for 12-18min at the speed of 500-800 rpm.
Preferably, in the step F, after the inner wall of the boiler is washed by clean water, the boiler heating device is opened for drying, the drying temperature is 60-70 ℃, and the drying time is 5 min.
Preferably, the lubricant in the step G is a water-based clay lubricant.
Compared with the prior art, the invention has the beneficial effects that:
(1) the descaling method adopted by the invention is simple to operate, can realize quick treatment of the scale in the boiler, and does not damage the side wall of the boiler in the descaling process.
(2) The descaling agent adopted by the invention has good descaling effect, does not corrode the inner wall of the boiler in the descaling process, is easy to wash, is environment-friendly and has no pollution.
(3) According to the invention, the stirring rod is used for stirring in the descaling process of the descaling agent, so that the descaling uniformity of the inner wall of the boiler can be improved, and the descaling efficiency is further improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
The first embodiment is as follows:
referring to fig. 1, the present invention provides a technical solution: a steam boiler descaling method, comprising the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 40 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing, wherein the washing is carried out for 3min each time, and the washing is repeated for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
In the embodiment, the components of the scale remover in the step B comprise, by weight, 4 parts of hydroxyethylidene acid, 4 parts of sodium nitrate, 3 parts of sodium hydroxide, 2 parts of sodium hypochlorite, 5 parts of acetic acid, 4 parts of citric acid, 3 parts of laurinol polyoxyethylene ether and 1 part of a corrosion inhibitor.
In this embodiment, in the step D, the rotation speed of the stirring motor is 1000 rpm, the mixture is stirred for 5min, then is kept standing for 10min, and is stirred at a speed of 500 rpm for 12 min.
In this embodiment, in step F, after the inner wall of the boiler is washed with clean water, the boiler heating device is opened to dry at 60 ℃ for 5 min.
In this example, the lubricant used in step G was a water-based clay lubricant.
Example two:
a steam boiler descaling method, comprising the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 50 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing, wherein the washing is carried out for 5min each time and is repeatedly carried out for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
In this embodiment, the detergent in step B comprises, by weight, 8 parts of hydroxyethylidene acid, 10 parts of sodium nitrate, 9 parts of sodium hydroxide, 4 parts of sodium hypochlorite, 10 parts of acetic acid, 8 parts of citric acid, 9 parts of laurinol polyoxyethylene ether, and 3 parts of a corrosion inhibitor.
In this embodiment, the rotation speed of the stirring motor in the step D is 2000 rpm, the mixture is stirred for 8min, then is kept stand for 10min, and is stirred at 800 rpm for 18 min.
In the embodiment, in the step F, after the inner wall of the boiler is washed with clean water, the boiler heating device is opened to dry, and the drying temperature is 70 ℃ and the drying time is 5 min.
In this example, the lubricant used in step G was a water-based clay lubricant.
Example three:
a steam boiler descaling method, comprising the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 42 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing, wherein the washing is carried out for 3min each time, and the washing is repeated for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
In this embodiment, the detergent in step B comprises, by weight, 5 parts of hydroxyethylidene acid, 5 parts of sodium nitrate, 4 parts of sodium hydroxide, 3 parts of sodium hypochlorite, 6 parts of acetic acid, 5 parts of citric acid, 4 parts of laurinol polyoxyethylene ether, and 2 parts of a corrosion inhibitor.
In the embodiment, in the step D, the rotating speed of the stirring motor is 1200 rpm, the stirring is carried out for 6min, then the still standing is carried out for 10min, and then the stirring is carried out for 13in at the speed of 550 rpm.
In this embodiment, in step F, after the inner wall of the boiler is washed with clean water, the boiler heating device is opened to dry, and the drying temperature is 62 ℃ for 5 min.
In this example, the lubricant used in step G was a water-based clay lubricant.
Example four:
a steam boiler descaling method, comprising the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 48 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing, wherein the washing is carried out for 5min each time and is repeatedly carried out for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
In the embodiment, the components of the scale remover in the step B comprise, by weight, 7 parts of hydroxyethylidene acid, 9 parts of sodium nitrate, 8 parts of sodium hydroxide, 3 parts of sodium hypochlorite, 9 parts of acetic acid, 7 parts of citric acid, 8 parts of laurinol polyoxyethylene ether and 2 parts of a corrosion inhibitor.
In this embodiment, the rotation speed of the stirring motor in the step D is 1800 rpm, the mixture is stirred for 7min, then kept stand for 10min, and then stirred at 700 rpm for 16 min.
In this embodiment, in step F, after the inner wall of the boiler is washed with clean water, the boiler heating device is turned on to dry at a drying temperature of 68 ℃ for 5 min.
In this example, the lubricant used in step G was a water-based clay lubricant.
Example five:
a steam boiler descaling method, comprising the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 45 ℃, putting the steam boiler into a stirring rod with a brush, starting a stirring motor connected with the stirring rod, and stirring;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing, wherein the washing is carried out for 4min each time and is repeatedly carried out for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
In this embodiment, the detergent in step B comprises, by weight, 6 parts of hydroxyethylidene acid, 7 parts of sodium nitrate, 6 parts of sodium hydroxide, 3 parts of sodium hypochlorite, 8 parts of acetic acid, 6 parts of citric acid, 6 parts of laurinol polyoxyethylene ether, and 2 parts of a corrosion inhibitor.
In this embodiment, in step D, the rotation speed of the stirring motor is 1500 rpm, the mixture is stirred for 6min, then kept stand for 10min, and then stirred at 650 rpm for 15 min.
In this embodiment, in step F, after the inner wall of the boiler is washed with clean water, the boiler heating device is opened to dry at 65 ℃ for 5 min.
In this example, the lubricant used in step G was a water-based clay lubricant.
The descaling agent adopted by the invention has good descaling effect, does not corrode the inner wall of the boiler in the descaling process, is easy to wash, is environment-friendly and has no pollution; according to the invention, the stirring rod is used for stirring in the descaling process of the descaling agent, so that the descaling uniformity of the inner wall of the boiler can be improved, and the descaling efficiency is further improved; in addition, the sprayed lubricant can protect the inner wall, and the water-based clay lubricant is easy to clean, environment-friendly and non-toxic.
In conclusion, the descaling method adopted by the invention is simple to operate, can realize quick treatment of the scale in the boiler, and does not damage the side wall of the boiler in the descaling process.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. A descaling method for a steam boiler is characterized by comprising the following steps: the method comprises the following steps:
A. firstly, cooling a steam boiler to a room temperature state;
B. closing a drain valve of the steam boiler, and injecting a descaling agent into the steam boiler;
C. simultaneously, spraying a descaling agent on the side wall of the steam boiler;
D. then slowly heating the steam boiler to 40-50 ℃, putting the steam boiler into a stirring rod with a brush, and starting a stirring motor connected with the stirring rod to stir;
E. after stirring, closing the boiler heating device, and simultaneously opening a liquid discharge valve to discharge the descaling waste liquid;
F. then spraying clear water to the inner side wall of the steam boiler by using a spray head for washing for 3-5min each time, and repeatedly washing for 3 times;
G. finally, lubricant is sprayed onto the side wall of the boiler.
2. A steam boiler descaling method according to claim 1, characterized in that: the components of the scale remover in the step B comprise, by weight, 4-8 parts of hydroxyethylidene acid, 4-10 parts of sodium nitrate, 3-9 parts of sodium hydroxide, 2-4 parts of sodium hypochlorite, 5-10 parts of acetic acid, 4-8 parts of citric acid, 3-9 parts of laurinol polyoxyethylene ether and 1-3 parts of a corrosion inhibitor.
3. A steam boiler descaling method according to claim 1, characterized in that: and D, the rotating speed of a stirring motor in the step D is 1000-.
4. A steam boiler descaling method according to claim 1, characterized in that: and in the step F, after the inner wall of the boiler is washed by clean water, opening a boiler heating device for drying at the temperature of 60-70 ℃ for 5 min.
5. A steam boiler descaling method according to claim 1, characterized in that: and the lubricant in the step G adopts a water-based clay lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010282373.8A CN111396853A (en) | 2020-04-12 | 2020-04-12 | Descaling method for steam boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010282373.8A CN111396853A (en) | 2020-04-12 | 2020-04-12 | Descaling method for steam boiler |
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| Publication Number | Publication Date |
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| CN111396853A true CN111396853A (en) | 2020-07-10 |
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| CN202010282373.8A Pending CN111396853A (en) | 2020-04-12 | 2020-04-12 | Descaling method for steam boiler |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4171329B2 (en) * | 2003-03-19 | 2008-10-22 | 株式会社荏原製作所 | Scale cleaner |
| CN101492634A (en) * | 2009-02-18 | 2009-07-29 | 西安协力动力科技有限公司 | Organic composite detergent for heat power plant boiler |
| CN102252309A (en) * | 2010-12-21 | 2011-11-23 | 戴锐 | Boiler descaling method |
| CN203100537U (en) * | 2013-01-31 | 2013-07-31 | 山西晋缘电力化学清洗中心有限公司 | Boiler chemical heating cleaning system |
| CN109237459A (en) * | 2018-09-02 | 2019-01-18 | 青岛安装建设股份有限公司 | A kind of newly-built drum boiler chemical cleaning method |
-
2020
- 2020-04-12 CN CN202010282373.8A patent/CN111396853A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4171329B2 (en) * | 2003-03-19 | 2008-10-22 | 株式会社荏原製作所 | Scale cleaner |
| CN101492634A (en) * | 2009-02-18 | 2009-07-29 | 西安协力动力科技有限公司 | Organic composite detergent for heat power plant boiler |
| CN102252309A (en) * | 2010-12-21 | 2011-11-23 | 戴锐 | Boiler descaling method |
| CN203100537U (en) * | 2013-01-31 | 2013-07-31 | 山西晋缘电力化学清洗中心有限公司 | Boiler chemical heating cleaning system |
| CN109237459A (en) * | 2018-09-02 | 2019-01-18 | 青岛安装建设股份有限公司 | A kind of newly-built drum boiler chemical cleaning method |
Non-Patent Citations (2)
| Title |
|---|
| 俞志明: "《中国化工商品大全》", 31 January 1996 * |
| 解鲁生: "《锅炉水处理原理与实用》", 28 February 1997 * |
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Application publication date: 20200710 |