CN104807369A - Method for cleaning contaminants at inner wall of boiler - Google Patents
Method for cleaning contaminants at inner wall of boiler Download PDFInfo
- Publication number
- CN104807369A CN104807369A CN201510191164.1A CN201510191164A CN104807369A CN 104807369 A CN104807369 A CN 104807369A CN 201510191164 A CN201510191164 A CN 201510191164A CN 104807369 A CN104807369 A CN 104807369A
- Authority
- CN
- China
- Prior art keywords
- boiler
- water
- valve
- heater
- liquid level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000356 contaminant Substances 0.000 title abstract 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000009835 boiling Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000003344 environmental pollutant Substances 0.000 claims description 15
- 231100000719 pollutant Toxicity 0.000 claims description 15
- 238000005201 scrubbing Methods 0.000 claims description 10
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000003599 detergent Substances 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a method for cleaning contaminants at the inner wall of a boiler. The boiler comprises a boiler body, a blowdown valve, a water supply valve, a liquid level meter, a safety valve and a steam valve, wherein the blowdown valve is arranged at the bottom part of the boiler body; the water supply valve is arranged at the side of the boiler body; the liquid level meter is arranged at the upper part of the boiler body; the safety valve and the steam valve are arranged at the top part of the boiler body. The method for cleaning the contaminants at the inner wall of the boiler comprises the following steps of (1) filling water into the boiler; (2) adding a detergent; (3) raising the temperature of water in the boiler; (4) boiling the water in the boiler; (5) removing the contaminants from the water in the boiler; (6) analyzing the water in the boiler. The method for cleaning the contaminants at the inner wall of the boiler has the advantage that the contaminants at the heating surface or the inner wall of the boiler can be effectively removed, so the heat efficiency of the boiler is improved.
Description
Technical field
The present invention relates to boiler manfacturing technical field, especially a kind of cleaning method of boiler inner wall pollutant.
Background technology
The boiler heating surface of new installation or inwall often with pollutants such as oil rust, process if do not carry out before operation, partly will be attached to inwall and form hard attachment, cause the thermal conductivity factor of heating surface to reduce, thus affect the thermal efficiency of boiler.Therefore, need badly and seek a kind of effective boiler inner wall pollutant cleaning method.
Summary of the invention
The present invention aims to provide a kind of cleaning method of boiler inner wall pollutant, and the method can remove the pollutant of boiler heating surface or inwall effectively, makes boiler operatiopn normal.
In order to solve the problem, the technical solution used in the present invention is:
The cleaning method of boiler inner wall pollutant, described boiler comprises body of heater, be located at the blowoff valve of bottom of furnace body, be located at the water-supply valve of body of heater side, be located at the liquid level gauge of upper of furnace body, and be located at safety valve, the steam valve at body of heater top, the cleaning method of described boiler inner wall pollutant comprises the following steps:
(1) boiler water filling, after boiler erection is good, injects demineralized water by described water-supply valve in body of heater, stops water filling when the liquid level in body of heater arrives the 50mm scale of described liquid level gauge;
(2) add stain remover, lay down described safety valve, add scrubbing solution from safety valve porch, the stain remover in described scrubbing solution is Na
3pO
412H
2o:NaOH:Na
2cO
3=1:1:1, every 1m
3boiler water in dissolve the Na of 2kg
3pO
412H
2o;
(3) boiler water heats up, and stain remover has reinstalled safety valve after throwing in and terminating again, then heats to the demineralized water in body of heater 2 ~ 3 hours, and make boiler water temperature rise to 150 ~ 160 DEG C, the programming rate of water temperature is less than 50 DEG C/h; During boiler heating, make the Liquid level in body of heater within the meter full scale of described liquid level gauge by described blowoff valve;
(4) steam boiler water, water temperature to be controlled within the scope of 150 ~ 160 DEG C boiling 16 ~ 24 hours, the steam of boiler output is sent from described steam valve, and steam pressure maintains 0.5 ~ 0.6MPa;
(5) boiler blowdown, blowoff valve blowdown was opened every one hour in during the boiling described in step (4), each blowdown makes the water level decreasing 50 ~ 60mm of liquid level gauge, and in body of heater, inject demineralized water and scrubbing solution by water-supply valve in time, make the Liquid level in body of heater more than the 50mm scale of liquid level gauge, make the basicity of water in boiler be not less than 45mg/L;
(6) boiler water is analyzed, in during the boiling described in step (4) every 2 hours from the blowdown of blowoff valve sample analysis boiler alkalinity or/and the content of phosphate radical, when boiler alkalinity tend towards stability or phosphate content continuous 6 hours remaining unchanged time open blowoff valve and carry out blowdown, complete the cleaning of boiler.
Preferably, the Na described in step (2)
3pO
412H
2o natrium carbonicum calcinatum replaces, and natrium carbonicum calcinatum is Na
3pO
412H
21.5 times of O.
Beneficial effect of the present invention is:
1, the cleaning method of the boiler inner wall pollutant of the present invention's announcement, can remove the pollutant of boiler heating surface or inwall effectively, thus improves the thermal efficiency of boiler;
2, stain remover of the present invention is conducive to forming tri-iron tetroxide diaphragm at the inner surface of boiler, improves the corrosion resistance of boiler inner wall.
Accompanying drawing explanation
Fig. 1 is the structural representation of boiler of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
Embodiment 1
As shown in Figure 1, the cleaning method of boiler inner wall pollutant.Described boiler comprises body of heater 600, is located at the blowoff valve 100 bottom body of heater 600, is located at the water-supply valve 200 of body of heater 600 side, is located at the liquid level gauge 300 on body of heater 600 top, and is located at safety valve 500, the steam valve 400 at body of heater 600 top.
The cleaning method of this boiler inner wall pollutant comprises the following steps:
Step one, boiler water filling, after boiler erection is good, injects demineralized water by water-supply valve 200 in body of heater 600, stops water filling when the liquid level in body of heater 600 arrives the 50mm scale of liquid level gauge 300;
Step 2, adds stain remover, lays down safety valve 500, adds scrubbing solution from safety valve 500 porch, and the stain remover in scrubbing solution is Na
3pO
412H
2o:NaOH:Na
2cO
3=1:1:1, every 1m
3boiler water in dissolve the Na of 2kg
3pO
412H
2o;
Step 3, boiler water heats up, and stain remover has reinstalled safety valve 500 after throwing in and terminating again, then heats to the demineralized water in body of heater 600 2 ~ 3 hours, and make boiler water temperature rise to 150 ~ 160 DEG C, the programming rate of water temperature is less than 50 DEG C/h; During boiler heating, make Liquid level in body of heater 600 within the meter full scale of liquid level gauge 300 by blowoff valve 100;
Step 4, steam boiler water, to control within the scope of 150 ~ 160 DEG C boiling 16 ~ 24 hours by water temperature, the steam of boiler output from steam valve 400 send, steam pressure maintains 0.5 ~ 0.6MPa;
Step 5, boiler blowdown, blowoff valve 100 blowdown was opened every one hour in during step 4 boiling, each blowdown makes the water level decreasing 50 ~ 60mm of liquid level gauge 300, and in body of heater 600, inject demineralized water and scrubbing solution by water-supply valve 200 in time, make the Liquid level in body of heater 600 more than the 50mm scale of liquid level gauge 300, make the basicity of water in boiler be not less than 45mg/L;
Step 6, analyze boiler water, in during step 4 boiling every 2 hours from the blowdown of blowoff valve 100 sample analysis boiler alkalinity or/and the content of phosphate radical, open blowoff valve 100 when continuous 6 hours the remaining unchanged of the phosphate content in boiler water and carry out blowdown, complete the cleaning of boiler.
Embodiment 2
The present embodiment difference from Example 1 is, in step 2, the stain remover in scrubbing solution is NaOH:Na
2cO
3=1:2.5, every 1m
3boiler water in dissolve the NaOH of 2kg; In step 6, open blowoff valve 100 when boiler alkalinity tends towards stability and carry out blowdown, complete the cleaning of boiler.
Although describe embodiments of the present invention by reference to the accompanying drawings; but patent owner can make various distortion or amendment within the scope of the appended claims; as long as be no more than the protection domain described by claim of the present invention, all should within protection scope of the present invention.
Claims (2)
1. the cleaning method of boiler inner wall pollutant, described boiler comprises body of heater, be located at the blowoff valve of bottom of furnace body, be located at the water-supply valve of body of heater side, be located at the liquid level gauge of upper of furnace body, and be located at safety valve, the steam valve at body of heater top, it is characterized in that, the cleaning method of described boiler inner wall pollutant comprises the following steps:
(1) boiler water filling, after boiler erection is good, injects demineralized water by described water-supply valve in body of heater, stops water filling when the liquid level in body of heater arrives the 50mm scale of described liquid level gauge;
(2) add stain remover, lay down described safety valve, add scrubbing solution from safety valve porch, the stain remover in described scrubbing solution is Na
3pO
412H
2o:NaOH:Na
2cO
3=1:1:1, every 1m
3boiler water in dissolve the Na of 2kg
3pO
412H
2o;
(3) boiler water heats up, and stain remover has reinstalled safety valve after throwing in and terminating again, then heats to the demineralized water in body of heater 2 ~ 3 hours, and make boiler water temperature rise to 150 ~ 160 DEG C, the programming rate of water temperature is less than 50 DEG C/h; During boiler heating, make the Liquid level in body of heater within the meter full scale of described liquid level gauge by described blowoff valve;
(4) steam boiler water, water temperature to be controlled within the scope of 150 ~ 160 DEG C boiling 16 ~ 24 hours, the steam of boiler output is sent from described steam valve, and steam pressure maintains 0.5 ~ 0.6MPa;
(5) boiler blowdown, blowoff valve blowdown was opened every one hour in during the boiling described in step (4), each blowdown makes the water level decreasing 50 ~ 60mm of liquid level gauge, and in body of heater, inject demineralized water and scrubbing solution by water-supply valve in time, make the Liquid level in body of heater more than the 50mm scale of liquid level gauge, make the basicity of water in boiler be not less than 45mg/L;
(6) boiler water is analyzed, in during the boiling described in step (4) every 2 hours from the blowdown of blowoff valve sample analysis boiler alkalinity or/and the content of phosphate radical, when boiler alkalinity tend towards stability or phosphate content continuous 6 hours remaining unchanged time open blowoff valve and carry out blowdown, complete the cleaning of boiler.
2. the cleaning method of boiler inner wall pollutant according to claim 1, is characterized in that, the Na described in step (2)
3pO
412H
2o natrium carbonicum calcinatum replaces, and natrium carbonicum calcinatum is Na
3pO
412H
21.5 times of O.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191164.1A CN104807369B (en) | 2015-04-21 | 2015-04-21 | The cleaning method of boiler inner wall pollutant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191164.1A CN104807369B (en) | 2015-04-21 | 2015-04-21 | The cleaning method of boiler inner wall pollutant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104807369A true CN104807369A (en) | 2015-07-29 |
| CN104807369B CN104807369B (en) | 2016-08-24 |
Family
ID=53692417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191164.1A Expired - Fee Related CN104807369B (en) | 2015-04-21 | 2015-04-21 | The cleaning method of boiler inner wall pollutant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104807369B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746989A (en) * | 2019-10-30 | 2020-02-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Coke oven gas cooler and cleaning method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059707A (en) * | 1991-08-14 | 1992-03-25 | 马振清 | Rapid descaling method for boiler |
| CN1060352A (en) * | 1991-10-29 | 1992-04-15 | 四川电力科学试验研究所 | The cleaning method and the device of steam turbine silicon dirt |
| JPH07260248A (en) * | 1994-03-24 | 1995-10-13 | Toto Ltd | Cleaning apparatus for hot water supplying apparatus |
| CN101221027A (en) * | 2008-01-23 | 2008-07-16 | 清华大学 | In-position cleaning method for town regenerated water plate type heat exchanger |
| CN102519301A (en) * | 2011-12-09 | 2012-06-27 | 贵州开磷（集团）有限责任公司 | Method for washing scales formed on tube of graphite heat exchanger |
| CN103512421A (en) * | 2013-10-08 | 2014-01-15 | 中国铝业股份有限公司 | Method for cleaning scales of heat exchanger |
-
2015
- 2015-04-21 CN CN201510191164.1A patent/CN104807369B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059707A (en) * | 1991-08-14 | 1992-03-25 | 马振清 | Rapid descaling method for boiler |
| CN1060352A (en) * | 1991-10-29 | 1992-04-15 | 四川电力科学试验研究所 | The cleaning method and the device of steam turbine silicon dirt |
| JPH07260248A (en) * | 1994-03-24 | 1995-10-13 | Toto Ltd | Cleaning apparatus for hot water supplying apparatus |
| CN101221027A (en) * | 2008-01-23 | 2008-07-16 | 清华大学 | In-position cleaning method for town regenerated water plate type heat exchanger |
| CN102519301A (en) * | 2011-12-09 | 2012-06-27 | 贵州开磷（集团）有限责任公司 | Method for washing scales formed on tube of graphite heat exchanger |
| CN103512421A (en) * | 2013-10-08 | 2014-01-15 | 中国铝业股份有限公司 | Method for cleaning scales of heat exchanger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746989A (en) * | 2019-10-30 | 2020-02-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Coke oven gas cooler and cleaning method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104807369B (en) | 2016-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160608 Address after: 453400 intersection of Hongli Avenue and Wenhua Road, Changyuan County, Henan Province Applicant after: HENAN PROVINCE SPEICAL ANTICORROSION Co.,Ltd. Address before: Room four, building A-5, Donghua Industrial Zone, Wuzhou Industrial Park, the Guangxi Zhuang Autonomous Region, 543100, China Applicant before: WUZHOU HAIBANG TECHNOLOGY CO.,LTD. |
|
| CB03 | Change of inventor or designer information |
Inventor after: Xia Pengwei Inventor after: Xiang Jun Fu Inventor after: Dong Yongyin Inventor after: Xia Yanqun Inventor after: Wang Zhike Inventor after: Wang Yaofa Inventor after: Xia Pengxing Inventor after: Li Yong Inventor after: Zhang Yunfeng Inventor after: Xia Kuiyang Inventor after: Fu Qiang Inventor after: Zhai Chunbo Inventor after: Zhang Yanping Inventor before: Zou Tiemei |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 453400 No. 266, Kuangcheng Road, Changyuan City, Xinxiang City, Henan Province Patentee after: Henan tefang Construction Group Co.,Ltd. Address before: 453400 intersection of Hongli Avenue and Wenhua Road, Changyuan County, Henan Province Patentee before: HENAN PROVINCE SPEICAL ANTICORROSION Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 |