CN106678782A - Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler - Google Patents
Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler Download PDFInfo
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- CN106678782A CN106678782A CN201510760134.8A CN201510760134A CN106678782A CN 106678782 A CN106678782 A CN 106678782A CN 201510760134 A CN201510760134 A CN 201510760134A CN 106678782 A CN106678782 A CN 106678782A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000001301 oxygen Substances 0.000 claims abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 3
- 239000003245 coal Substances 0.000 claims description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 8
- 238000005457 optimization Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 230000001464 adherent effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000002893 slag Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
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- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a bowl-shaped or W-shaped wind distributing method for rotational flow combustion of a large power station coal-fired boiler. The method comprises the steps that according to the boiler interior combustion condition and the tail smoke component testing result, the bowl-shaped wind distributing method that the boiler takes combustors on all layers as units is set up, namely, the secondary blast capacity of the middle combustor is slightly small, the blast capacity of the combustors on the two sides is gradually increased, for the rotational flow combustion boiler with the wide hearth, on the basis of the bowl-shaped wind distributing method, multiple secondary blast capacities are arranged for the two combustors in the middle, and the wind distributing manner of the rotational flow combustor secondary blast capacities of the side walls of the same layers is of an W shape. In the wind distributing method, for the combustors, wind is distributed layer by layer from the lowest layer to the uppermost layer, and later, the boiler operation oxygen, the main combustion wind and burn-out wind distribution ratio are optimized and adjusted. The method can eliminate or weaken tendency of high-temperature corrosion and slag bonding occurring close to the water cooling walls, the number of times for replacing the water cooling pipes is reduced, the overall combustion efficiency of the boiler is improved, and the method has good economy and practicality.
Description
Technical field
The present invention relates to the swirl flow combustion pulverized-coal fired boiler technical field that liquidates in front and back, more particularly to a kind of bowl-type or W type air distribution methods of large-scale power station coal-burning boiler swirl flow combustion.
Background technology
In the actual motion of large-sized station boiler, nearby adherent smoke components are the quality for reflecting boiler combustion situation to water-cooling wall in the smoke components concentration parameter, flue-gas temperature and stove in boiler back end ductwork.
At present, the main burning area of domestic face-fired boiler is generally controlled by the way of coal, equal distribution wind using impartial, and each layer burner gives uniform secondary air flow.The closer near water-cooling wall, the air quantity needed for its burning is also required to relatively more boiler-burner.When not abundant enough in the burner combustion near both sides near water-cooling wall, the gases such as substantial amounts of carbon monoxide and hydrogen sulfide can be produced, this can cause both walls water-cooling wall, and nearby smoke components are presented reducing atmosphere, increased the risk that water wall high temperature corrosion and coking occur, this problem is more easy to occur use unburnable coal and during compared with low-volatite coal kind in boiler.And for the swirl flow combustion boiler compared with wide combustion chamber, because the flue gas that intermediate combustion device burning in the direction of the width is produced can be flowed at first under combustion chamber draft effect to upper furnace, further to strengthen flue gas flow strength upwards and further driving the flowing velocity of flue gas that adjacent burners burning produces, therefore the more secondary air flow of burner needs of centre.
Summary, the present invention liquidates swirl flow combustion boiler as object with before and after the current country, by advanced burner Secondary Air air distribution adjustment mode, to eliminate as much as or weaken the trend that high temperature corrosion and slagging scorification occur near water-cooling wall, reduce the scaling-off risk of bulk of boiler operatiopn, reduce water screen tube and change number of times, improve the integral combustion efficiency of boiler, be economical and practicality a technological invention of the art.
The content of the invention
The bowl-type or W type air distribution methods of large-scale power station coal-burning boiler swirl flow combustion provided by the present invention, with before and after the current country swirl flow combustion boiler is liquidated as object, by advanced burner Secondary Air air distribution adjustment mode, to eliminate as much as or weaken the trend that high temperature corrosion and slagging scorification occur near water-cooling wall, reduce the scaling-off risk of bulk of boiler operatiopn, reduce water screen tube and change number of times, improve the integral combustion efficiency of boiler.
For achieving the above object, the present invention provides following technical scheme：
Will it is described before and after liquidate swirl flow combustion pulverized-coal fired boiler secondary air flow in units of layer along furnace height direction controlling spray into burn；
The Secondary Air air distribution of the described each layer burner of control is presented and carries out allocation of the amount of air in bowl-type mode, the secondary air flow of the burner in the middle of i.e. is somewhat less than normal, and give the air quantity of both sides burner and be stepped up, and for the swirl flow combustion boiler compared with wide combustion chamber, middle two burners are given on the basis of bowl-type air distribution method and is also provided with more secondary air flow so that W types are presented in the turbulent burner secondary air flow air distribution mode of same layer lateral wall；
Air distribution set-up procedure includes gradually being sequentially adjusted in toward upper strata from bottom burner and through boiler integrated optimization of combustion adjustment accordingly after each layer burner of operation carries out Secondary Air air distribution adjustment by the secondary air distribution adjustment order of burner.
The invention discloses a kind of bowl-type of large-scale power station coal-burning boiler swirl flow combustion or W type air distribution methods, the burning optimization adjustment of swirl flow combustion pulverized-coal fired boiler of can liquidating for before and after is provided and instructs thinking, mitigate the debugging efforts intensity of field adjustable personnel, and the performance driving economy of boiler plant can be improved, the method is simple to operate, effect is practical.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing to be used needed for embodiment or description of the prior art will be done simply introduce below.
Fig. 1 liquidates the front/rear wall layout drawing of burner (the front/rear wall layout drawing (face-fired boiler) of burner as shown in Figure 1) of swirl flow combustion pulverized-coal fired boiler before and after being, each layer burner structure pattern is just the same, one layer of burnout degree is being arranged away from the certain height and position of the superiors' main burner, front-back wall is each one layer.
Fig. 2 is a kind of burner structure schematic diagram (turbulent burner structural representation is as indicated with 2) of the domestic a certain burner manufacturer in the embodiment of the present invention, and the control executing agency that wind disk is the secondary air flow in the present invention is adjusted in the slip in described burner.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described with specific embodiment.
As shown in Figure 1, the bowl-type or W type air distribution methods of the large-scale power station coal-burning boiler swirl flow combustion of the present invention, liquidate before and after being included in each layer burner of swirl flow combustion pulverized-coal fired boiler, 8 burners of per layer of arrangement (generally per layer is arranged 4,6 or 8), front-back wall is each 3 layers, burnout degree front-back wall respectively arranges 1 layer (generally 1 or 2 layer of arrangement), 8 fire air nozzles (usually 4～8) of per layer of arrangement.
As shown in Fig. 2 the burner in the embodiment of the present invention is a kind of burner structure schematic diagram of domestic a certain burner manufacturer, the control executing agency that wind disk is the secondary air flow in the present invention is adjusted in the slip in described burner.
The bowl-type or W type air distribution methods of the large-scale power station coal-burning boiler swirl flow combustion of the present invention, its embodiment is：Will it is described before and after liquidate swirl flow combustion pulverized-coal fired boiler secondary air flow in units of layer along furnace height direction controlling spray into burn；
The Secondary Air air distribution of the described each layer burner of control is presented and carries out allocation of the amount of air in bowl-type mode, the secondary air flow of the burner in the middle of i.e. is somewhat less than normal, and give the air quantity of both sides burner and be stepped up, and for the swirl flow combustion boiler compared with wide combustion chamber, middle two burners are given on the basis of bowl-type air distribution method and is also provided with more secondary air flow so that W types are presented in the turbulent burner secondary air flow air distribution mode of same layer lateral wall；
Gradually it is sequentially adjusted in toward upper strata burner from bottom burner by the Secondary Air air distribution adjustment order of burner, and chamber flue gas temperature and flame combustion situation are observed by measuring the burner hearth flame-observing hole of the adherent smoke components of water-cooling wall and correspondence burner layer, further determine whether the Secondary Air air distribution adjustment for re-starting this layer of burner；
Through accordingly operation each layer burner carry out Secondary Air air distribution adjustment after, the smoke components and flue-gas temperature of economizer exit in composite measurement burner hearth back-end ductwork, judge boiler integral combustion operation conditions, and corresponding control adjustment is carried out to boiler operatiopn oxygen amount and main burning wind, burnout degree proportioning according to result feedback, to complete the adjustment of boiler integrated optimization of combustion.
The invention discloses the bowl-type of large-scale power station coal-burning boiler swirl flow combustion or W type air distribution methods, the method is simple to operate, has very strong practicality and operability in the use of large-scale coal-fired power station boiler, and the method is also applied for fuel oil station boiler.
Claims (4)
1. the bowl-type of large-scale power station coal-burning boiler swirl flow combustion or W type air distribution methods, it is characterised in that including following several respects：
Will it is described before and after liquidate swirl flow combustion pulverized-coal fired boiler secondary air flow in units of layer along furnace height direction controlling spray into burn；
The Secondary Air air distribution of the described each layer burner of control is presented carries out allocation of the amount of air in bowl-type mode, i.e., the burner of centre is secondary
Air quantity is somewhat less than normal, and gives the air quantity of both sides burner and be stepped up, and for the swirl flow combustion boiler compared with wide combustion chamber, in bowl
Middle two burners are given on the basis of type air distribution method and is also provided with more secondary air flow so that in the swirl flow combustion of same layer lateral wall
Device secondary air flow air distribution mode is presented W types；Air distribution set-up procedure includes being fired by bottom by the secondary air distribution adjustment order of burner
Burner is gradually sequentially adjusted in and through boiler entirety accordingly after each layer burner of operation carries out Secondary Air air distribution adjustment toward upper strata
Burning optimization is adjusted；
2. the bowl-type of large-scale power station coal-burning boiler swirl flow combustion according to claim 1 or W type air distribution methods, its feature exists
In：Will it is described before and after liquidate swirl flow combustion pulverized-coal fired boiler secondary air flow in units of layer along furnace height direction controlling spray into fire
Burn；The Secondary Air air distribution of the described each layer burner of control is presented carries out secondary air flow distribution, i.e., middle burning in bowl-type mode
The secondary air flow of device is somewhat less than normal, and gives the air quantity of both sides burner and be stepped up；
3. the bowl-type of large-scale power station coal-burning boiler swirl flow combustion according to claim 1 or W type air distribution methods, its feature exists
In：Gradually it is sequentially adjusted in toward upper strata burner from bottom burner by the Secondary Air air distribution adjustment order of burner, and by surveying
The burner hearth flame-observing hole observation chamber flue gas temperature and flame combustion situation of the adherent smoke components of amount water-cooling wall and correspondence burner layer, enters
One step judges whether the Secondary Air air distribution adjustment for re-starting this layer of burner；
4. the bowl-type of large-scale power station coal-burning boiler swirl flow combustion according to claim 1 or W type air distribution methods, its feature exists
In：Through accordingly operation each layer burner carry out Secondary Air air distribution adjustment after, economizer in composite measurement burner hearth back-end ductwork
The smoke components and flue-gas temperature of outlet, judge boiler integral combustion operation conditions, and are fed back to boiler operatiopn oxygen amount according to result
Corresponding control adjustment is carried out with main burning wind, burnout degree proportioning, to complete the adjustment of boiler integrated optimization of combustion, realizes that items refer to
Mark performance optimum state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510760134.8A CN106678782A (en) | 2015-11-06 | 2015-11-06 | Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510760134.8A CN106678782A (en) | 2015-11-06 | 2015-11-06 | Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler |
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| CN106678782A true CN106678782A (en) | 2017-05-17 |
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| CN201510760134.8A Pending CN106678782A (en) | 2015-11-06 | 2015-11-06 | Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167823A (en) * | 2018-01-29 | 2018-06-15 | 西安交通大学 | A kind of band axial direction adjustable vane prevents the device of burner nozzle slagging |
| CN110657449A (en) * | 2019-09-20 | 2020-01-07 | 沈忠东 | Automatic adjusting mechanism and adjusting method for internal air and external air of combustor |
| CN113251435A (en) * | 2021-06-15 | 2021-08-13 | 天津国能津能滨海热电有限公司 | Combustor adjusting method and system based on temperature field, DCS (distributed control System) and medium |
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| CN101644431A (en) * | 2009-08-31 | 2010-02-10 | 中国计量学院 | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner |
| CN103423765A (en) * | 2013-08-29 | 2013-12-04 | 国家电网公司 | Air distribution coupling burning method and system for reducing NOX exhaust |
| CN203907595U (en) * | 2014-06-13 | 2014-10-29 | 烟台龙源电力技术股份有限公司 | Boiler |
| CN104676582A (en) * | 2015-02-04 | 2015-06-03 | 浙江大学 | Method for preventing side water walls of opposed combusting boiler from high temperature corrosion |
| CN204438101U (en) * | 2015-01-21 | 2015-07-01 | 西安热工研究院有限公司 | A kind of boiler opposed firing structure |
-
2015
- 2015-11-06 CN CN201510760134.8A patent/CN106678782A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644431A (en) * | 2009-08-31 | 2010-02-10 | 中国计量学院 | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner |
| CN103423765A (en) * | 2013-08-29 | 2013-12-04 | 国家电网公司 | Air distribution coupling burning method and system for reducing NOX exhaust |
| CN203907595U (en) * | 2014-06-13 | 2014-10-29 | 烟台龙源电力技术股份有限公司 | Boiler |
| CN204438101U (en) * | 2015-01-21 | 2015-07-01 | 西安热工研究院有限公司 | A kind of boiler opposed firing structure |
| CN104676582A (en) * | 2015-02-04 | 2015-06-03 | 浙江大学 | Method for preventing side water walls of opposed combusting boiler from high temperature corrosion |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167823A (en) * | 2018-01-29 | 2018-06-15 | 西安交通大学 | A kind of band axial direction adjustable vane prevents the device of burner nozzle slagging |
| CN108167823B (en) * | 2018-01-29 | 2024-05-24 | 西安交通大学 | Device with axially adjustable blades for preventing slag formation of burner nozzle |
| CN110657449A (en) * | 2019-09-20 | 2020-01-07 | 沈忠东 | Automatic adjusting mechanism and adjusting method for internal air and external air of combustor |
| CN113251435A (en) * | 2021-06-15 | 2021-08-13 | 天津国能津能滨海热电有限公司 | Combustor adjusting method and system based on temperature field, DCS (distributed control System) and medium |
| WO2022262425A1 (en) * | 2021-06-15 | 2022-12-22 | 天津国能津能滨海热电有限公司 | Temperature field-based burner adjustment method, system, dcs system, and medium |
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