CN109737389A - A kind of quasi- eastern coal low-temperature burning control system - Google Patents
A kind of quasi- eastern coal low-temperature burning control system Download PDFInfo
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- CN109737389A CN109737389A CN201910145117.1A CN201910145117A CN109737389A CN 109737389 A CN109737389 A CN 109737389A CN 201910145117 A CN201910145117 A CN 201910145117A CN 109737389 A CN109737389 A CN 109737389A
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Abstract
A kind of quasi- eastern coal low-temperature burning control system, the present invention relates to a kind of combustion control systems, the present invention is in order to easily cause boiler scaling and contamination when solving the problems, such as quasi- eastern coal combustion, the present invention includes boiler furnace, multiple after-flame wind combustors, cycle flue and back-end ductwork, a kind of low-temperature burning control system of quasi- eastern coal further includes coal dust firing device assembly, the coal dust firing device assembly is uniformly arranged on boiler furnace inner wall along burner hearth center, the multiple after-flame wind combustor is arranged above coal dust firing device assembly, back-end ductwork is located at the right end of boiler, the lower end of back-end ductwork is equipped with smoking mouth, one end of cycle flue is connect by after-flame wind combustor with boiler furnace, the other end of cycle flue is connect with smoking mouth.
Description
Technical field
The present invention relates to a kind of combustion control systems, and in particular to one kind is for quasi- eastern coal low-temperature burning control system.
Background technique
Eastern Junggar coalfield be explored in 2005 be confirmed as subsurface storage the coal resources of more than one hundred billion ton, prognostic reserves reach
390000000000 tons, coal resources reserves of verifying accumulative at present are 213,600,000,000 tons, are China maximum self-contained coalfields at present.In China
Eastern, middle part the old Energy Base of a batch shows resource exhaustion trend and national energy demand also in ever-increasing situation,
Xinjiang Coal will become Chinese highly important energy splice zone and strategic energy reserves area.Due to quasi- eastern coal alkali metal content
Na in high ash2O content is 5%-10%；CaO content is 20%-40%, and when burning easily causes boiler scaling and contamination, is led
Cause boiler safe and reliable, quasi- east coal combustion technology becomes global problem urgently to be resolved, seriously constrains quasi- eastern
The large-scale application of coal.The characteristics of quasi- east coal quality high-moisture, strong clinkering property, serious contamination, makes its burning nothing in the boiler
Method uses conventional combustion control method.
Summary of the invention
The purpose of the present invention is to solve easily cause the problem of boiler scaling is with staiing, Jin Erti when quasi- eastern coal combustion
For a kind of quasi- eastern coal low-temperature burning control system.
The technical scheme is that
A kind of low-temperature burning control system of quasi- eastern coal, it includes boiler furnace, multiple after-flame wind combustors, cycle flue
And back-end ductwork, a kind of low-temperature burning control system of quasi- east coal further includes coal dust firing device assembly, the coal dust firing
Device assembly is uniformly arranged on boiler furnace inner wall along burner hearth center, and the multiple after-flame wind combustor is arranged in coal burner
Above component, back-end ductwork is located at the right end of boiler, and the lower end of back-end ductwork is equipped with smoking mouth, and one end of cycle flue passes through combustion
Wind combustor to the greatest extent is connect with boiler furnace, and the other end of cycle flue is connect with smoking mouth.
Further, each coal dust firing device assembly is made of several coal dust firing units, the combustion of several coal dusts
It burns unit to be from top to bottom successively vertically arranged, each coal dust firing unit includes a coal burner and two Secondary Air sprays
Mouthful, two overfire air ports are located above and below coal burner.
Further, the lower section of coal burner is equipped with greatly in the coal dust firing unit of coal burner component bottom
Bore overfire air port, top are equipped with small-bore wind snout；The coal in the coal dust firing unit at the top of coal dust firing device assembly
The top of powder burner is equipped with heavy caliber overfire air port, and lower section is equipped with small-bore wind snout；In coal dust firing device assembly
Small-bore wind snout is equipped with above and below coal burner in the coal dust firing unit in portion.
Further, the described device further includes flow measurement device, expansion joint, flue gas recirculation blower fan and flue gas recirculation gear
Plate, the flow measurement device, expansion joint, flue gas recirculation blower fan and flue gas recirculation baffle are successively set on circulation cigarette from front to back
On road.
Further, the flue gas recirculation baffle is located at the lower end of smoking mouth.
Further, the described device further includes smoke duster, and the smoke duster is mounted on back-end ductwork.
The present invention has the effect that compared with prior art
1, the invention proposes a kind of low-temperature burning control system suitable for high-alkali quasi- eastern coal, pass through optimizing combustor cloth
The mode of form, fuel element and flue gas recirculation is set, easily caused boiler scaling and contamination when quasi- eastern coal combustion are solved
The problem of；2, needle is directed at the unit style burning concept that eastern coal coal characteristics propose, each layer mill is divided into relatively independent burning
Unit keeps its burning relatively independent and uniform, reduces the influence to adjacent mill to the greatest extent.The oxygen amount in main burning area is to approach combustion completely
Burning is advisable, and by burner hearth highest fibre selection in burnout degree region, and declines rapidly with the increase of burner hearth absolute altitude, is aided with applicable
In the soot blower arrangement form of quasi- eastern coal, to realize quasi- eastern coal low-temperature burning, the difficulty of the easy slagging of quasi- eastern coal combustion, contamination is cracked
Topic；3, it is sent back in furnace by the partial fume that smoking mouth extracts boiler emission, utilizes the heat absorption of inert gas and subtracting for oxygen concentration
It is few, flame temperature is reduced, burning velocity is inhibited, the formation and radiation of burner hearth heat absorption of NOx is reduced, makes water screen system temperature levels
Controllably, the case where can not only substantially alleviating the slagging, contamination and dust stratification of boiler in this way, boiler nitrogen oxygen can also be greatly lowered
The production quantity of compound guarantees that boiler can be safe and stable uses high-alkali quasi- eastern coal.Smoke temperature is about 100-150 DEG C at smoking mouth,
And dustiness is less, weaker to the abrasion of flue gas recirculation flue, the requirement to cycle flue material is unlikely excessively high；4, eastern coal subject to
Application in thermoelectricity field provides technical support, so that the quasi- eastern coal in Xinjiang is turned waste into wealth, to ensure that national energy security, boundary electricity are outer
It send, Xinjiang region stabilization is mentioned from powerful power-assisted.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of fuel element；
Fig. 3 is the left view of Fig. 2.
Specific embodiment
Specific embodiment 1: embodiment is described with reference to Fig. 1, a kind of low-temperature burning of quasi- eastern coal of present embodiment
Control system, it includes boiler furnace 1, after-flame wind combustor 2, cycle flue 6 and back-end ductwork 9, a kind of quasi- eastern coal
Low-temperature burning control system further includes coal dust firing device assembly 3, and the coal dust firing device assembly 3 is uniformly arranged along burner hearth center
On 1 inner wall of boiler furnace, the after-flame wind combustor 2 is arranged above coal dust firing device assembly, and back-end ductwork 9 is located at boiler
Right end, the lower end of back-end ductwork 9 are equipped with smoking mouth 10, and one end of cycle flue 6 is connected by after-flame wind combustor and boiler furnace 1
It connects, the other end of cycle flue 6 is connect with smoking mouth 10.
Smoking mouth is set in the tail portion of boiler, the low-temperature flue gas after ash disposal point is extracted out from smoking mouth, is sent into through cycle flue 6
After-flame wind combustor 2 injects 1 high temperature combustion zone of boiler furnace, the slagging of boiler can be effectively relieved, be stained with after mixing with burnout degree
The case where dirty and dust stratification.
Specific embodiment 2: illustrating present embodiment, each coal dust combustion of present embodiment in conjunction with Fig. 1 to Fig. 3
Burner component 3 is made of several coal dust firing units, several coal dust firing units are from top to bottom successively vertically arranged, each
Coal dust firing unit includes a coal burner 12 and two overfire air ports, and two overfire air ports are located at coal dust combustion
Above and below burner 12.
Unit style burning concept is established, with a coal burner and two overfire air ports for one group of fuel element, often
Branch coal burner is equipped with surrounding air, capacity of the quantity of fuel element according to boiler, reasonable disposition, each group of fuel element
Operating condition is relatively stable, and air distribution is independent.It is aided with the soot blower arrangement form for being suitable for quasi- eastern coal, increases soot blower and arrange quantity, and
Above dry bottom hopper inflection point, the space of water power sootblower installation site is reserved.Other compositions and connection relationship and specific embodiment party
Formula one is identical.
Specific embodiment 3: embodiment is described with reference to Fig. 1, coal dust firing device assembly is located at described in present embodiment
The lower section of coal burner 12 is equipped with heavy caliber overfire air port 13 in the coal dust firing unit of 3 bottoms, and top is equipped with small-bore
Wind snout 14；The top of coal burner 12 is equipped with heavy caliber in the coal dust firing unit at 3 top of coal dust firing device assembly
Overfire air port 13, lower section are equipped with small-bore wind snout 14；The coal in the coal dust firing unit at 3 middle part of coal dust firing device assembly
Small-bore wind snout 14 is equipped with above and below powder burner 12.
There is size in the aperture of the overfire air port, so set, lower layer's backing wind needs larger air quantity, therefore needs
Jet size is slightly larger.Other compositions and connection relationship are identical with embodiment two.
Specific embodiment 4: embodiment is described with reference to Fig. 1, the described device of present embodiment further includes flow
Measuring device 4, expansion joint 5, flue gas recirculation blower fan 7 and flue gas recirculation baffle 11, the flow measurement device 4, expansion joint 5, cigarette
Gas circulating fan 7 and flue gas recirculation baffle 11 are successively set on from front to back on cycle flue 6.
So set, measuring device 4 is used for batching cycle exhaust gas volumn；Expansion joint 5 prevents heat for absorbing metal thermal deviation
Deviation bring metal drawing crack；Flue gas recirculation blower fan 7 guarantees flue gas recirculation amount for overcoming cycle flue resistance；By adjusting
11 aperture of flue gas recirculation baffle carrys out control loop exhaust gas volumn.
Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 5: embodiment is described with reference to Fig. 1,11, the flue gas recirculation baffle of present embodiment
In the lower end of smoking mouth 10.Other compositions and connection relationship are identical as specific embodiment four.
Specific embodiment 6: embodiment is described with reference to Fig. 1, the described device of present embodiment further includes flue gas
Deduster 8, the smoke duster 8 are mounted on back-end ductwork 9.Smoke duster 8 is power plant's conventional equipment, so set,
The appearance of the problems such as removing a large amount of dusts carried in flue gas, avoiding back-end ductwork dust stratification and abrasion, corrosion.Other compositions
It is same as the specific embodiment one with connection relationship.
Although the present invention has been disclosed as a preferred embodiment, what however, it is not intended to limit the invention, art technology
Personnel can also do other variations in spirit of that invention, and be applied in the unmentioned field of the present invention, certainly, these according to
The variation done according to spirit of that invention should be all included in scope of the present invention.
Claims (6)
1. a kind of low-temperature burning control system of quasi- eastern coal, it includes boiler furnace (1), after-flame wind combustor (2), cycle flue
(6) and back-end ductwork (9), it is characterised in that: a kind of low-temperature burning control system of quasi- eastern coal further includes coal burner
Component (3), the coal dust firing device assembly (3) are uniformly arranged on boiler furnace (1) inner wall along burner hearth center, the burnout degree
Burner (2) is arranged above coal dust firing device assembly, and back-end ductwork (9) is located at the right end of boiler, the lower end of back-end ductwork (9)
Equipped with smoking mouth (10), one end of cycle flue (6) is connect by after-flame wind combustor with boiler furnace (1), cycle flue (6)
The other end connect with smoking mouth (10).
2. a kind of low-temperature burning control system of quasi- eastern coal according to claim 1, it is characterised in that: each coal dust
Burner assembly (3) is made of several coal dust firing units, several coal dust firing units are from top to bottom successively vertically arranged,
Each coal dust firing unit includes a coal burner (12) and two overfire air ports, and two overfire air ports are located at
Above and below coal burner (12), each coal dust firing unit independence air distribution.
3. a kind of low-temperature burning control system of quasi- eastern coal according to claim 2, it is characterised in that: be located at coal dust firing
The lower section of coal burner (12) is equipped with heavy caliber overfire air port (13) in the coal dust firing unit of device assembly (3) bottom, on
Side is equipped with small-bore wind snout (14)；The coal burner in the coal dust firing unit at the top of coal dust firing device assembly (3)
(12) top is equipped with heavy caliber overfire air port (13), and lower section is equipped with small-bore wind snout (14)；Positioned at coal burner group
Small-bore wind snout (14) are equipped with above and below coal burner (12) in coal dust firing unit in the middle part of part (3).
4. a kind of low-temperature burning control system of quasi- eastern coal according to claim 1, it is characterised in that: the described device is also
Including flow measurement device (4), expansion joint (5), flue gas recirculation blower fan (7) and flue gas recirculation baffle (11), the flow measurement
Device (4), expansion joint (5), flue gas recirculation blower fan (7) and flue gas recirculation baffle (11) are successively set on cycle flue from front to back
(6) on.
5. a kind of low-temperature burning control system of quasi- eastern coal according to claim 4, it is characterised in that: the flue gas recirculation
Baffle (11) is located at the lower end of smoking mouth (10).
6. a kind of low-temperature burning control system of quasi- eastern coal according to claim 1, it is characterised in that: the described device is also
Including smoke duster (8), the smoke duster (8) is mounted on back-end ductwork (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910145117.1A CN109737389A (en) | 2019-02-27 | 2019-02-27 | A kind of quasi- eastern coal low-temperature burning control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910145117.1A CN109737389A (en) | 2019-02-27 | 2019-02-27 | A kind of quasi- eastern coal low-temperature burning control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413569A (en) * | 2020-10-14 | 2021-02-26 | 上海交通大学 | High-speed jet flow over-fire air device with circulating flue gas |
| CN113280359A (en) * | 2021-06-25 | 2021-08-20 | 西安热工研究院有限公司 | Method for reducing contamination of convection heating surface of n-shaped high-sodium coal boiler |
| CN114777106A (en) * | 2022-03-31 | 2022-07-22 | 西安热工研究院有限公司 | Novel flue gas recirculation input steam temperature adjusting system |
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| CN109114588A (en) * | 2018-08-31 | 2019-01-01 | 华北水利水电大学 | It is pure to fire high-alkali coal wet bottom boiler low NOx combustion system and method for controlling combustion |
| CN208365510U (en) * | 2018-06-26 | 2019-01-11 | 哈尔滨锅炉厂有限责任公司 | One kind using the quasi- eastern coal 660MW opposed firing super critical boiler in Xinjiang |
| CN209926346U (en) * | 2019-02-27 | 2020-01-10 | 哈尔滨锅炉厂有限责任公司 | east-Junggar coal low-temperature combustion control system |
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Patent Citations (6)
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| CN101995015A (en) * | 2009-08-14 | 2011-03-30 | 戴卫军 | Four-corner circle-cutting low Nox (Nitrogen Oxide) combustion technology of direct current burner |
| CN204756977U (en) * | 2015-07-31 | 2015-11-11 | 哈尔滨锅炉厂有限责任公司 | Low temperature gas recirculation device of high sodium metal coal tower formula boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413569A (en) * | 2020-10-14 | 2021-02-26 | 上海交通大学 | High-speed jet flow over-fire air device with circulating flue gas |
| CN113280359A (en) * | 2021-06-25 | 2021-08-20 | 西安热工研究院有限公司 | Method for reducing contamination of convection heating surface of n-shaped high-sodium coal boiler |
| CN114777106A (en) * | 2022-03-31 | 2022-07-22 | 西安热工研究院有限公司 | Novel flue gas recirculation input steam temperature adjusting system |
| CN114777106B (en) * | 2022-03-31 | 2024-01-30 | 西安热工研究院有限公司 | Novel flue gas recirculation input steam temperature adjusting system |
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