CN102168273A - Maintaining and energy-saving method for blowout stand-by boiler - Google Patents
Maintaining and energy-saving method for blowout stand-by boiler Download PDFInfo
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- CN102168273A CN102168273A CN 201110060898 CN201110060898A CN102168273A CN 102168273 A CN102168273 A CN 102168273A CN 201110060898 CN201110060898 CN 201110060898 CN 201110060898 A CN201110060898 A CN 201110060898A CN 102168273 A CN102168273 A CN 102168273A
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Abstract
The invention relates to a maintaining and energy-saving method for a blowout stand-by boiler, which comprises the following steps: after the boiler steps out, reserving a fire bed; after the boiler is naturally cooled, when the exit temperature of the furnace chamber drops to 100 DEG C or so, the drum pressure is 0.05-0.1 MPa and the water level is kept within the range of drum central line +/-30mm, carrying out maintenance: carrying out water-side maintenance and vapor-side maintenance, and restarting the blowout stand-by boiler every 24 hours, wherein every time the restarting operation is finished, the opening of the fume outlet baffle is controlled at 10%, and the furnace chamber draft is adjusted to the minimum. The method provided by the invention well overcomes the defects in the prior art. The test proves that the method has favorable application effect and has the characteristics of quick start of the blowout stand-by boiler, favorable maintenance effect and obvious energy-saving effect.
Description
Technical field
The invention belongs to the maintaining technical field between Industrial Boiler blowing out standby period, be specifically related to the maintaining power-economizing method between a kind of traveling-grate stoker water tube donkey blowing out standby period.
Background technology
Maintaining during the boiler shutdown mainly is for preventing the corrosion of boiler.Bad as maintaining, the corrosion of furnace shutdown period is even more serious during often than boiler operatiopn.Causing reason for corrosion is that metal covering makes moist and the entering of air, as long as keep dry or secluding air (oxygen), just can effectively prevent corrosion.Furnace stopping maintenance method commonly used has pressure maintenance, wet method maintenance, dry preservation and inflation maintenance etc.Above maintenance procedure, be applicable to the boiler shutdown and the situation of hot reserve not, through secular facts have proved, having of row, and be widely used, if but need be in long-term stand-by state behind the boiler shutdown, adopt above maintenance procedure, it is fairly obvious that secondary boiler starts slow shortcoming, can not satisfy enterprise's quantity-produced needs, and maintenance energy consumption height.The maintenance of existing " vapour pressure force method " heat, promptly boiler is out of service, behind the naturally cooling, adopts and raises fire mode once in per 8 hours, keeps its internal vapor pressure between 0.1～0.2MPa, and steam is arranged atmosphere by exhaust-valve.Because the pressure in the boiler so just can stop in the air admission boiler greater than barometric point, prevents the generation of oxygen corrosion.According to measuring and calculating, 1 20 tons of standby traveling-grate stoker water tube donkey of blowing out was raised the fire maintenance in per 8 hours once, made the interior vapor pressure of drum reach between 0.1～0.2MPa 2 tons in consumption coal, raise fire every day 3 times, 6 tons in consumption coal, 2 average daily 12 tons in coals that consume, the annual blowing out standby time calculated by 200 days, year is consumed coal and will reach 2400 tons, cost of ton coal is by 600 yuan of calculating, and a year cost reaches 1,440,000 yuan, also the costs such as de-mineralized water of calculation consumption not.
Summary of the invention
The purpose of this invention is to provide a kind of blowing out secondary boiler maintaining power-economizing method easy and simple to handle, this maintenance methods is respond well, and the blowing out secondary boiler starts rapidly, and energy-saving effect is remarkable.
The object of the present invention is achieved like this: between traveling-grate stoker water tube donkey blowing out standby period, can carry out maintaining to it by " soda solution grouting " and " steam impact molding " two kinds of methods that approach combines.Water side, control stove water ph value are between 10～12, and stove water can form the stable protective membrane of one deck on the Boiler Metallic surface, prevents that corrosive from carrying out.The vapour side keeps its internal pressure greater than normal atmosphere, can effectively prevent entering of extraneous air (oxygen), prevents the generation of oxygen corrosion.
Concrete grammar is as follows:
After the boiler off-the-line, keep grate, treat its naturally cooling, when the furnace outlet temperature drops to about 100 ℃, drum pressure is between 0.05～0.1MPa, and water level maintains in drum medullary ray ± 30mm scope, can drop into maintenance.
1, water side maintenance: during boiler operatiopn, the working control of stove water ph value is between 10～12, after boiler shutdown is standby, stove water when keeping its operation is kept steam water-level in the scope of drum center ± 30mm, closes all drain valves, wash water valve just can maintain its water side;
2, vapour side maintenance: after boiler shutdown is standby, its main vapour motorized valve of standard-sized sheet and main vapour manual valve, close exhaust-valve, draw the anti-back-steam bag air space of irritating of low-pressure steam from the drain water piping of the female pipe of low-pressure steam, keep vapor pressure between 0.1～0.2MPa, vapor pressure in the secondary boiler is greater than barometric point like this, can prevent effectively that air outside from entering, the steam oxygen-free gas of Yin Ruing simultaneously, so just can guarantee main team pipe, superheated vapour collection case, drum air space, oxygen corrosion can not take place in the superheater tube inwall;
3, per 24 hours, start induced draft fan, fan, fire grate and feeder the blowing out secondary boiler is raised fire once, keep that there is kindling material in the coal seam on its fire grate, control furnace outlet temperature gets final product about 100 ℃, and the coal seam is laid to 2/3 of grate area and is advisable.Raise fire and can not only keep that grate does not extinguish on the blowing out secondary boiler fire grate, and can guarantee that the operation boiler is when breaking down, energy is ignition trigger rapidly, shortened the preliminary preparation of igniting kindling greatly, kept certain fire box temperature, can remove the wet steam in the blowing out secondary boiler burner hearth by the poplar fire, prevent that the erosion of heating surface outer wall is rotten, improve the water temperature in the drum simultaneously, reduce drum carbonated drink spatial wall temperature difference, prevent that drum from producing " banana " distortion;
4, raise fire finish out-of-blast machine, fire grate and feeder operation, keep the induced draft fan operation, the exhanst gas outlet baffle opening is controlled at 10%, and adjusts combustion chamber draft to minimum (can't smell the coal gas flavor in the boiler house gets final product).The purpose of control combustion chamber draft is the radiating rate that reduces in the burner hearth, makes the drum wall temperature even relatively, and keeps the burner hearth drying;
The maintenance methods of the standby traveling-grate stoker water tube donkey of blowing out of the present invention has overcome the deficiencies in the prior art well, evidence, effect is good, has the blowing out secondary boiler and starts rapidly, maintain respond well, the Remarkable Energy Saving characteristics.After adopting maintenance procedure of the present invention, 20 tons of standby traveling-grate stoker water tube donkeys of 1 blowing out every day only need be raised fire once, 0.5 ton in day consumption coal, 1.536 tons of day consumption steam, the annual blowing out standby time calculated by 200 days, 2 blowing out secondary boilers, 200 tons in year consumption coal, 614 tons of year consumption steam, cost of ton coal is by 120,000 yuan of 600 yuan of calculating, year coal consumption costs, the ton steam cost is by 100 yuan of calculating, 6.14 ten thousand yuan of year steam costs, 18.14 ten thousand yuan of two total costs.Than adopting " vapour pressure force method " hot maintenance method separately, 2200 tons in year saving coal reduces 125.86 ten thousand yuan of costs.
Description of drawings
Fig. 1 is boiler systems figure.
Among the figure: 1-main team pipe, 2-master's vapour motorized valve, 3-master's vapour manual valve, the manual emptying secondary valve of 4-, 5-is the once empty valve of row manually, 6-two stage superheater outlet collection case, the 7-two stage superheater, 8-primary superheater, 9-primary superheater inlet header case, the 10-drum, the 11-steam water-level, 12-furnace wall cooling, 13-economizer, 14-gives water mixer, 15-desuperheater.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
1, water side maintenance: during boiler operatiopn, the working control of stove water ph value is between 10～12.Therefore, after boiler shutdown was standby, the stove water when keeping its operation was kept steam water-level 11 in the scope of drum center ± 30mm, closes all drain valves, and wash water valve carries out the maintenance of water side.
2, vapour side maintenance: after boiler shutdown is standby, its main vapour motorized valve 2 of standard-sized sheet and main vapour manual valve 3, close valve of manual emptying 5 and manual emptying secondary valve 4, draw the 3kg low-pressure steam by its main team pipe 1, two stage superheater outlet collection case 6, two stage superheater 7, primary superheater 8, primary superheater inlet header case 9 from the drain water piping of the female pipe of low-pressure steam, anti-back-steam bag 10 air spaces of irritating keep vapor pressure between 0.1～0.2MPa.Vapor pressure in the secondary boiler is greater than barometric point like this, can prevent effectively that air outside from entering, the steam oxygen-free gas of Yin Ruing guarantees its main team pipe, a secondary superheated vapour collection case, drum air space simultaneously, and one or two superheater tube inwalls oxygen corrosion can not take place.
3, per 24 hours, start induced draft fan, fan, fire grate and feeder the blowing out secondary boiler is raised fire once, keep that there is kindling material in the coal seam on its fire grate, control furnace outlet temperature gets final product about 100 ℃, and the coal seam is laid to 2/3 of grate area and is advisable.Raise the purpose of fire, at first, can not only keep that grate does not extinguish on the blowing out secondary boiler fire grate, and can guarantee to move boiler and break down the time, it is ignition trigger rapidly, has shortened the preliminary preparation of the kindling of lighting a fire greatly.Secondly, keep certain fire box temperature, can remove the wet steam in the blowing out secondary boiler burner hearth, prevent that the erosion of heating surface outer wall is rotten, improve the water temperature in the drum simultaneously, reduce drum carbonated drink spatial wall temperature difference, prevent that drum from producing " banana " distortion
4, raise fire finish out-of-blast machine, fire grate and feeder operation, keep the induced draft fan operation, the exhanst gas outlet baffle opening is controlled at 10%, and adjusts combustion chamber draft to minimum (can't smell the coal gas flavor in the boiler house gets final product).
Can set up the system of making regular check on, guarantee that secondary boiler obtains effective monitoring during maintaining, vapor pressure in main monitoring stove water ph value, dissolved oxygen and the drum and drum carbonated drink space wall temperature (temperature difference≤50 ℃), and record, simultaneously grate, air compartment, pit, ash tube etc. are checked, guarantee that secondary boiler state 100% is good, during in order to operation boiler catastrophic failure, it can start fast.
Claims (1)
1. blowing out secondary boiler maintaining power-economizing method, after it is characterized in that the boiler off-the-line, keep grate, treat its naturally cooling, when the furnace outlet temperature drops to about 100 ℃, drum pressure is between 0.05～0.1MPa, and water level maintains in drum medullary ray ± 30mm scope, can drop into maintenance, concrete steps are as follows:
1) water side maintenance: during boiler operatiopn, the stove water ph value is controlled between 10～12, and after boiler shutdown was standby, the stove water when keeping its operation was kept steam water-level in the scope of drum center ± 30mm, closes all drain valves, and wash water valve maintains the water side;
2) vapour side maintenance: after boiler shutdown is standby, main vapour motorized valve in the standard-sized sheet boiler plant and main vapour manual valve, close manual exhaust-valve, draw the anti-back-steam bag air space of irritating of low-pressure steam, keep vapor pressure between 0.1～0.2MPa from the drain water piping of the female pipe of low-pressure steam;
3) the blowing out secondary boiler raised fire once in per 24 hours, start induced draft fan, fan and feeder when raising fire, there is kindling material in the coal seam on the maintenance fire grate, and lay to 2/3 of grate area in the coal seam, the furnace outlet temperature is about 100 ℃, and the temperature difference of drum carbonated drink space wall temperature is no more than 50 ℃;
4) raise fire finish out-of-blast machine, fire grate and feeder operation, keep the induced draft fan operation, the exhanst gas outlet baffle opening is controlled at 10%, and adjusts combustion chamber draft to minimum.
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| CN2011100608988A CN102168273B (en) | 2011-03-15 | 2011-03-15 | Maintaining and energy-saving method for blowout stand-by boiler |
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| CN2011100608988A CN102168273B (en) | 2011-03-15 | 2011-03-15 | Maintaining and energy-saving method for blowout stand-by boiler |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703907A (en) * | 2012-06-14 | 2012-10-03 | 安徽皖维高新材料股份有限公司 | Maintenance system for reserved boiler formed by continuous drainage of adjacent operating boiler and maintenance method |
| 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 |
| CN102886182A (en) * | 2012-10-17 | 2013-01-23 | 宿玉华 | Protection device and protection method for filter bag of bag-type dust remover |
| CN103436891A (en) * | 2012-06-14 | 2013-12-11 | 安徽皖维高新材料股份有限公司 | Standby boiler maintenance method |
| CN104819450A (en) * | 2015-05-22 | 2015-08-05 | 马钢(集团)控股有限公司 | Method for controlling steam drum wall temperature difference after constant parameter normal shutdown of boiler |
| CN110296436A (en) * | 2019-07-09 | 2019-10-01 | 威立雅（哈尔滨）热电有限公司 | Computer improves boiler pressuring fire and restarts success rate and starting stationarity method |
| CN113551217A (en) * | 2021-08-10 | 2021-10-26 | 西安热工研究院有限公司 | Method for improving corrosion resistance of heating surface during boiler shutdown |
| CN113974444A (en) * | 2021-10-29 | 2022-01-28 | 添可智能科技有限公司 | Intelligent cooking equipment maintenance processing method and intelligent cooking equipment |
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| WO2006073619A2 (en) * | 2004-11-30 | 2006-07-13 | Ashland Licensing And Intellectual Property Llc | Automated process for inhibiting corrosion in an inactive boiler containing an aqueous system |
| CN201068276Y (en) * | 2007-07-04 | 2008-06-04 | 朔州诚通电力科技服务有限责任公司 | Boiler protection aerating device |
| CN101310045A (en) * | 2005-11-16 | 2008-11-19 | 栗田工业株式会社 | Corrosion prevention method for boiler in rest |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006073619A2 (en) * | 2004-11-30 | 2006-07-13 | Ashland Licensing And Intellectual Property Llc | Automated process for inhibiting corrosion in an inactive boiler containing an aqueous system |
| CN101310045A (en) * | 2005-11-16 | 2008-11-19 | 栗田工业株式会社 | Corrosion prevention method for boiler in rest |
| CN201068276Y (en) * | 2007-07-04 | 2008-06-04 | 朔州诚通电力科技服务有限责任公司 | Boiler protection aerating device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436891B (en) * | 2012-06-14 | 2015-04-15 | 安徽皖维高新材料股份有限公司 | Standby boiler maintenance method |
| CN103436891A (en) * | 2012-06-14 | 2013-12-11 | 安徽皖维高新材料股份有限公司 | Standby boiler maintenance method |
| CN102703907B (en) * | 2012-06-14 | 2014-04-09 | 安徽皖维高新材料股份有限公司 | Maintenance system for reserved boiler formed by continuous drainage of adjacent operating boiler and maintenance method |
| CN102703907A (en) * | 2012-06-14 | 2012-10-03 | 安徽皖维高新材料股份有限公司 | Maintenance system for reserved boiler formed by continuous drainage of adjacent operating boiler and maintenance method |
| CN102886182A (en) * | 2012-10-17 | 2013-01-23 | 宿玉华 | Protection device and protection method for filter bag of bag-type dust remover |
| 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 |
| CN102878781B (en) * | 2012-10-29 | 2014-11-26 | 青岛华仁药业股份有限公司 | Boiler steam heating dry preservation method |
| CN104819450A (en) * | 2015-05-22 | 2015-08-05 | 马钢(集团)控股有限公司 | Method for controlling steam drum wall temperature difference after constant parameter normal shutdown of boiler |
| CN104819450B (en) * | 2015-05-22 | 2016-08-24 | 马钢(集团)控股有限公司 | A kind of boiler controls the method for drum wall temperature difference after determining the normal blowing out of parameter |
| CN110296436A (en) * | 2019-07-09 | 2019-10-01 | 威立雅（哈尔滨）热电有限公司 | Computer improves boiler pressuring fire and restarts success rate and starting stationarity method |
| CN113551217A (en) * | 2021-08-10 | 2021-10-26 | 西安热工研究院有限公司 | Method for improving corrosion resistance of heating surface during boiler shutdown |
| CN113551217B (en) * | 2021-08-10 | 2022-11-29 | 西安热工研究院有限公司 | Method for improving corrosion resistance of heating surface during boiler shutdown |
| CN113974444A (en) * | 2021-10-29 | 2022-01-28 | 添可智能科技有限公司 | Intelligent cooking equipment maintenance processing method and intelligent cooking equipment |
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| CN102168273B (en) | 2012-03-28 |
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