CN105506646A - Gas-fired boiler maintenance method - Google Patents
Gas-fired boiler maintenance method Download PDFInfo
- Publication number
- CN105506646A CN105506646A CN201510998758.3A CN201510998758A CN105506646A CN 105506646 A CN105506646 A CN 105506646A CN 201510998758 A CN201510998758 A CN 201510998758A CN 105506646 A CN105506646 A CN 105506646A
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- China
- Prior art keywords
- boiler
- stove
- gas fired
- gas
- maintenance procedure
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a gas-fired boiler maintenance method which is characterized in that the gas-fired boiler maintenance method comprises the following steps that A, steam is supplied to a boiler to expel air; B, warming and pressurization are carried out in the boiler; C, the interior of the boiler is cooled, and condensation water is drained after cooling; and D, inert gas is supplied to the boiler, and the boiler is sealed. With the adoption of the gas-fired boiler maintenance method, moisture in the boiler is dried and oxygen is discharged, so that a situation that water and oxygen which have active chemical properties undergo chemical reaction with metal in the boiler to erode the metal is avoided. The gas-fired boiler maintenance method is suitable for a long-term outage standby boiler.
Description
Technical field
The present invention relates to a kind of maintenance procedure for gas fired-boiler.
Background technology
Gas fired-boiler is as the term suggests refer to the boiler that fuel is combustion gas, and gas fired-boiler and oil-firing boiler, electric boiler are most economical by comparison, so most of people have selected the boiler plant of gas fired-boiler as steam, heating, bathing.
The use of most of gas fired-boiler has seasonality, especially as heating boiler.Have the part boiler several months for subsequent use every year, if do not maintained, corrosion speed will accelerate several times even decades of times than boiler operation, bearing capacity reduces, and not only affects the work-ing life of equipment, causes any property loss, once use, also huge potential safety hazard can be produced.
Summary of the invention
In view of this, the invention provides a kind of maintenance procedure of gas fired-boiler, between boiler down standby period, it is maintained, avoid producing corrosion in stove, affect boiler work-ing life.
For solving above technical problem, technical scheme of the present invention is: a kind of gas fired-boiler maintenance procedure, is characterized in that comprising the following steps:
A. in stove, pass into steam air is discharged;
B. temperature-pressure is carried out in stove;
C. cool in stove, after cooling, water of condensation is discharged;
D. in stove, rare gas element is passed into, and boiler is airtight.
Improve as one, between described step C and step D, in stove, add siccative.The moisture of dry pot furnace interior as much as possible, avoids metal and water chemistry to react.
Preferred as one, described siccative composition comprises Calcium Chloride Powder Anhydrous, Calcium dichloride dihydrate, polyacrylamide, plant amylum.This siccative utilizes organic polymer composition, low raw-material cost; By polymer self structure characteristic, higher wettability power can be obtained, up to more than 400% and working lipe long, do not have liquid water and ooze out.
Preferred as one, by weight described calcium chloride 1-3 part, Calcium dichloride dihydrate 5-8 part, polyacrylamide 1-5 part, plant amylum 0 ~ 1 part.
Preferred as one, described plant amylum is yam starch or sweet potato starch.Reduce the manufacturing cost of siccative, the cost of upkeep of whole boiler is decreased.
Improve as one, described B and step C can be repeatedly.For furnace air (particularly oxygen) is drained, avoid metal and moisture in oxygen and stove to react, cause metallic corrosion.
Improve as one, in described step B, temperature is higher than 100 DEG C, and pressure is 0.5-1Mpa.
Improve as one, described rare gas element is nitrogen.Nitrogen non-corrosiveness, and stable chemical nature, be not easy to metal and react.Utilize nitrogen to be full of in stove, avoid oxygen to enter.
Aforesaid method monthly repeats once.
Usefulness of the present invention is: the gas fired-boiler maintenance procedure with above-mentioned steps, moisture in stove is carried out drying, and discharges oxygen, the metal generation chemical reaction in the water avoiding chemical property active and oxygen and stove thus produce corrosion of metal.Be applicable to the boiler that lengthy shut down is for subsequent use.
Embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with embodiment, the present invention is described in further detail.
A maintenance procedure for gas fired-boiler, includes step:
A. in stove, pass into steam air is discharged; Be specially and boiler air valve is opened, close wash water valve and water discharge valve.Then open steam valve and pass into steam in stove.Along with steam enters, furnace pressure increases, and the air in stove can be discharged from pressure lock.When see have steam to discharge time, can pressure lock be closed.
B. temperature-pressure is carried out in stove; Continue to pass into steam, make its furnace pressure between 0.5-1Mpa, in-furnace temperature remains on more than 100 DEG C, and continues 2-3 hour.
C. cool in stove, after cooling, water of condensation is discharged; After stopping passing into steam, in-furnace temperature declines, and water vapor condensation is discharged from wash water valve after becoming liquid water.Step B and step C repeatedly, for easily there is the impurity of chemical reaction in clean stove, and can discharge moisture.In addition, in order to make stove inner drying as much as possible, after emptying water of condensation, siccative can also be added in stove.The siccative composition selected comprises Calcium Chloride Powder Anhydrous, Calcium dichloride dihydrate, polyacrylamide, plant amylum.By weight described calcium chloride 1-3 part, Calcium dichloride dihydrate 5-8 part, polyacrylamide 1-5 part, plant amylum 0 ~ 1 part.Described plant amylum is yam starch or sweet potato starch.
D. in stove, rare gas element is passed into, and boiler is airtight.This rare gas element is preferably nitrogen, nitrogen chemical property torpescence, and cheap.Best operating method passes into nitrogen from upper boiler, due to the proportion lighter than air of nitrogen, forces the air in stove to be discharged from bottom.When nitrogen is full of in stove completely, by airtight for import and export each in stove.Avoid water vapour and air to enter in stove and corrosion is caused to boiler.
Above step finally monthly repeats once, guarantees that boiler is not corroded.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a gas fired-boiler maintenance procedure, is characterized in that comprising the following steps:
A. in stove, pass into steam air is discharged;
B. temperature-pressure is carried out in stove;
C. cool in stove, after cooling, water of condensation is discharged;
D. in stove, rare gas element is passed into, and boiler is airtight.
2. a kind of gas fired-boiler maintenance procedure according to claim 1, is characterized in that: in stove, add siccative between described step C and step D.
3. a kind of gas fired-boiler maintenance procedure according to claim 2, is characterized in that: described siccative composition comprises Calcium Chloride Powder Anhydrous, Calcium dichloride dihydrate, polyacrylamide, plant amylum.
4. a kind of gas fired-boiler maintenance procedure according to claim 3, is characterized in that: by weight described calcium chloride 1-3 part, Calcium dichloride dihydrate 5-8 part, polyacrylamide 1-5 part, plant amylum 0 ~ 1 part.
5. a kind of gas fired-boiler maintenance procedure according to claim 3, is characterized in that: described plant amylum is yam starch or sweet potato starch.
6. a kind of gas fired-boiler maintenance procedure according to claim 1, is characterized in that: described B and step C can be repeatedly.
7. a kind of gas fired-boiler maintenance procedure according to claim 1, is characterized in that: in described step B, temperature is higher than 100 DEG C, and pressure is 0.5-1Mpa.
8. a kind of gas fired-boiler maintenance procedure according to claim 1, is characterized in that: described rare gas element is nitrogen.
9. a kind of gas fired-boiler maintenance procedure according to claim 1, is characterized in that: the method monthly repeats once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510998758.3A CN105506646B (en) | 2015-12-25 | 2015-12-25 | Gas fired-boiler maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510998758.3A CN105506646B (en) | 2015-12-25 | 2015-12-25 | Gas fired-boiler maintenance method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105506646A true CN105506646A (en) | 2016-04-20 |
| CN105506646B CN105506646B (en) | 2018-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510998758.3A Active CN105506646B (en) | 2015-12-25 | 2015-12-25 | Gas fired-boiler maintenance method |
Country Status (1)
| Country | Link |
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| CN (1) | CN105506646B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710315A (en) * | 2018-05-22 | 2018-10-26 | 江苏国信靖江发电有限公司 | Control method, system, equipment and the storage medium of mortifier injection |
| CN109806731A (en) * | 2017-11-20 | 2019-05-28 | 柳州市皇之品贸易有限公司 | A kind of mothproof desiccant of safety and environmental protection |
| CN112393219A (en) * | 2019-08-13 | 2021-02-23 | 中国石油化工股份有限公司 | Dry maintenance method for maintaining boiler by using superheated steam |
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| CN1827206A (en) * | 2004-08-10 | 2006-09-06 | 超级干燥印尼有限公司 | Hygroscopic mixture |
| CN102519228A (en) * | 2011-11-23 | 2012-06-27 | 中国神华能源股份有限公司 | Maintenance method for boiler |
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| CN102878781A (en) * | 2012-10-29 | 2013-01-16 | 青岛华仁药业股份有限公司 | Boiler steam heating dry preservation method |
| CN103041691A (en) * | 2012-09-07 | 2013-04-17 | 赵立地 | Drying agent composition |
| CN103566910A (en) * | 2013-10-15 | 2014-02-12 | 昆山威胜干燥剂研发中心有限公司 | Drying agent |
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2015
- 2015-12-25 CN CN201510998758.3A patent/CN105506646B/en active Active
Patent Citations (6)
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| CN1827206A (en) * | 2004-08-10 | 2006-09-06 | 超级干燥印尼有限公司 | Hygroscopic mixture |
| CN102519228A (en) * | 2011-11-23 | 2012-06-27 | 中国神华能源股份有限公司 | Maintenance method for boiler |
| CN102519030A (en) * | 2012-01-10 | 2012-06-27 | 广东电网公司电力科学研究院 | Shutdown maintenance method of thermal equipment |
| CN103041691A (en) * | 2012-09-07 | 2013-04-17 | 赵立地 | Drying agent composition |
| CN102878781A (en) * | 2012-10-29 | 2013-01-16 | 青岛华仁药业股份有限公司 | Boiler steam heating dry preservation method |
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| 大庆油田特种作业安全培训中心编: "《工业锅炉运行与安全技术》", 31 May 2013, 中国石油大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109806731A (en) * | 2017-11-20 | 2019-05-28 | 柳州市皇之品贸易有限公司 | A kind of mothproof desiccant of safety and environmental protection |
| CN108710315A (en) * | 2018-05-22 | 2018-10-26 | 江苏国信靖江发电有限公司 | Control method, system, equipment and the storage medium of mortifier injection |
| CN108710315B (en) * | 2018-05-22 | 2020-04-07 | 江苏国信靖江发电有限公司 | Method, system, device and storage medium for controlling injection of inhibitor |
| CN112393219A (en) * | 2019-08-13 | 2021-02-23 | 中国石油化工股份有限公司 | Dry maintenance method for maintaining boiler by using superheated steam |
| CN112393219B (en) * | 2019-08-13 | 2022-09-16 | 中国石油化工股份有限公司 | Dry maintenance method for maintaining boiler by using superheated steam |
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| Publication number | Publication date |
|---|---|
| CN105506646B (en) | 2018-11-20 |
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