CN105546566B - A kind of stable combusting device for Low Volatile Lean Coal - Google Patents
A kind of stable combusting device for Low Volatile Lean Coal Download PDFInfo
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- CN105546566B CN105546566B CN201610056893.0A CN201610056893A CN105546566B CN 105546566 B CN105546566 B CN 105546566B CN 201610056893 A CN201610056893 A CN 201610056893A CN 105546566 B CN105546566 B CN 105546566B
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- stable
- spout
- housing
- burning
- bluff body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of stable combusting device for Low Volatile Lean Coal, including housing, the multiphase flow spout that can be swung is connected with the shell one end, the housing is interior to connect stable burning bluff body of the rear portion longitudinal section for triangular structure with the multiphase flow spout provided with anterior；The stable burning bluff body is provided with separation pre-burning device over and under in the housing；Temperature measuring equipment and Cooling protector are provided with the housing；It is the hollow structure of composition high temperature fluid reflux inside the stable burning bluff body；The burner, which can be stablized, uses meager coal of the fugitive constituent below 10%；It can realize and the high temperature fluid capacity of returns in separation precombustion chamber, recirculating zone, backflow zone position are precisely controlled and adjusted, the burner is set to greatly enhance the combustion stability of thermal power plant pulverized-coal fired boiler, boiler extinguishment can be prevented and prevent burner scaling loss, while effectively improve the security and economy of boiler operatiopn.
Description
Technical field
The present invention relates in the combustion system of the industry power boiler such as thermal power plant station boiler and chemical industry, metallurgy
Burner technical field, a kind of thermal power plant pulverized-coal fired boiler that is applied to is particularly belonged to when using low-volatile coal, energy
Enough it is effectively improved combustion conditions and strengthens unstable combustion, nitrogen oxides height, after-flame that low-volatile coal occurs in burning and imitates
A kind of stable combusting device for Low Volatile Lean Coal of rate difference problems.
Background technology
At present, the electric coal utilization of Power Plant in China is inefficient.Meet boiler of power plant design coal coal come amount compared with
It is few, largely carry out coal and much all deviate from design and effect core coal.
1st, at present, the ordinary straight streaming burner for using Low Volatile Lean Coal, it is necessary to mix with 50% high-volatile cigarette
Coal, and mix with it is uneven tomography occurs when, combustion chamber draft can be unstable suddenly and boiler extinguishment occurs.
2nd, for using the other forms burner of Low Volatile Lean Coal, such as the deep or light moulded coal such as block type, venetian blind type
Powder burner, when mix match somebody with somebody some high-volatile bituminous coal when, due to mix match somebody with somebody it is sometimes uneven, just often have boiler extinguishment, burning in
The generation of the accident such as heart rise, main steam overtemperature, superheater tubes burst and abnormal conditions.
3rd, for using the boiler of meager coal and the relatively low meager coal inferior of fugitive constituent, using the burner of pre-burning device, if
As-fired coal is mixed and disorderly, there is bituminous coal, meager coal, anthracite, and these coals are mixed with inequality sometimes, and such boiler occurs that burner burns
The accidents such as bad, coking and exception.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide to coal ature of coal accommodation is wide, fire extinguishing is steady
Combustion ability is strong, burn-out-proof undermines that abrasion service life is long, simple in construction, repacking arrangement is convenient, can effectively reduce being used for for DS NOx Est
The stable combusting device of Low Volatile Lean Coal.
To achieve these goals, the technical solution adopted by the present invention is：
This kind is used for the stable combusting device of Low Volatile Lean Coal, including housing, and being connected with the shell one end can
The multiphase flow spout of swing, provided with the anterior rear portion longitudinal section that connected with the multiphase flow spout it is triangular structure in the housing
Stable burning bluff body；The stable burning bluff body is provided with separation pre-burning device over and under in the housing；The shell
It is provided with temperature measuring equipment and Cooling protector in vivo；For in composition high temperature fluid reflux inside the stable burning bluff body
Hollow structure.
The separation pre-burning device is by the stable burning bluff body top and states the first separation formed between shell top wall
The the second separation preheating channel formed between preheating channel and the stable burning bluff body bottom and the housing lower wall is formed.
The multiphase flow spout includes top concentrated phase spout, the light phase spout in bottom and located at the top concentrated phase spout and institute
State the heat-resisting spout of middle part metal between the light phase spout in bottom.
The multiphase flow spout is connected with swing connecting bar, and the swing connecting bar is connected with oscillating cylinder.
The oral area of the top concentrated phase spout, the light phase spout in bottom and the heat-resisting spout of middle part metal is equipped with breeze airflow expansion
Fall apart.
The stable burning bluff body and the housing are integral type casting structure.
The stable burning bluff body outer wall posts anti-wearing ceramic.
The temperature measuring equipment is located at the center of multiphase flow spout described in face in the housing.
The Cooling protector is the cooling duct in the access housing.
The advantage of the invention is that：The present invention is burnt by multiphase flow spout, separation precombustion chamber is burnt, high temperature fluid flows back
Device, empennage-type surely fire the combination of bluff body, Cooling protector five Technologies so that the burner, which can be stablized, uses fugitive constituent
Meager coal below 10%；The essence to separating the high temperature fluid capacity of returns in precombustion chamber, recirculating zone, the zone position that flows back can be realized
Quasi- control and adjustment, make the burner greatly enhance the combustion stability of thermal power plant pulverized-coal fired boiler, can prevent boiler
Burner scaling loss is put out a fire and prevented, while effectively improves the security and economy of boiler operatiopn；Thermal power plant pulverized-coal fired boiler
DS NOx Est can effectively be reduced using burner operation.
Brief description of the drawings
Mark in the content and figure expressed below each width accompanying drawing of description of the invention is briefly described：
Fig. 1 is the vertical section structure schematic diagram for the stable combusting device that the present invention is used for Low Volatile Lean Coal.
Fig. 2 is the cross-sectional structure schematic diagram for the stable combusting device that the present invention is used for Low Volatile Lean Coal.
Fig. 3 is the planar structure signal of the multiphase flow spout for the stable combusting device that the present invention is used for Low Volatile Lean Coal
Figure.
Mark in above-mentioned figure is：
1st, multiphase flow spout；2nd, pre-burning device is separated；3rd, Cooling protector；4th, temperature measuring equipment；5th, stable burning bluff body；
6th, high temperature fluid reflux, 7, swing mechanism, 8, housing, 9, top concentrated phase spout, 10, the light phase spout in bottom, 11, middle part gold
Belong to heat-resisting spout.
Embodiment
It is further detailed to the embodiment work of the present invention by the description to optimum embodiment below against accompanying drawing
Thin explanation.
As shown in Figures 1 and 2, this kind is used for the stable combusting device of Low Volatile Lean Coal, including housing 8, the one end of housing 8
On be connected with the multiphase flow spout 1 that can be swung, stable burning bluff body 5 is provided with housing 8, the stable bluff body 5 that burns is anterior and more
Mutually stream spout 1 connects, and the stable rear portion longitudinal section of bluff body 5 of burning is triangular structure；The top of stable burning bluff body 5 in housing 8
And lower section is provided with separation pre-burning device 2；Temperature measuring equipment 4 and Cooling protector 3 are provided with housing 8；Inside stable burning bluff body 5
To form the hollow structure of high temperature fluid reflux 6.
Low-volatile fuel gas stream effectively can be carried out effective segmentation current stabilization by multiphase flow spout 1, to reach different
Combustion function and region.Separation pre-burning device 2 can preheat to the breeze airflow for entering burner, improve its temperature of catching fire
Degree, ignition heat is reduced, makes it to catch fire in advance under relatively low heat absorption capacity.Cooling protector 3 can adjust separation pre-burning
The temperature of device 2, anti-locking apparatus scaling loss.Temperature measuring equipment 4 is by detecting temperature, to adjust the air quantity of cooling device.Stable burning
The rear portion of bluff body 5 is empennage-type structure, can carry out one-level separation to breeze airflow, while improve discharge speed, concentration
Uniformity, advantageously reduce nitrogen oxides.High temperature fluid reflux 6 can control igniting temperature of pulverized-coal and control coal dust
Fiery distance.
The first separation preheating channel that separation pre-burning device 2 is formed by stably burning between the top of bluff body 5 and the upper wall of housing 8
And the second separation preheating channel formed between the stable burning bottom of bluff body 5 and the lower wall of housing 8 is formed.Separate pre-burning device 2 by
The coal dust channel composition of upper and lower two various concentrations, makes its air outlet velocity reach 25-30m/s, and in two coal dust channel centers
Form negative pressure region, can be by the air draught of high temperature by Involving velocity, volume is drawn onto the root of coal dust channel, heating-up temperature compared with
Low breeze airflow, its ignition temperature is improved 1-2 times, ignition action can be played rapidly, established for the completely burned of next step
Fixed basis；The surface area and muzzle velocity of coal dust channel are the keys for determining pre-burning effect.
As shown in figure 3, multiphase flow spout 1 includes top concentrated phase spout 9, the light phase spout 10 in bottom and sprayed located at top concentrated phase
The heat-resisting spout 11 of middle part metal between mouth 9 and the light phase spout 10 in bottom.Flameholding catches fire operating mode and burning fire point
Control is all optimized by multiphase flow spout 1.First air coal dust inhales high-temperature flue gas preheating coal dust to reach purpose of catching fire through pulleying, its
Diffusion angle, bias pulverized coal spout ratio exist according to the fugitive constituent for the coal burnt, calorific value, ash content, the different of alkali metal
Different differences.
Multiphase flow spout 1 is connected with swing mechanism 7, and swing mechanism 7 includes and the swing connecting bar of the connection of multiphase flow spout 1,
Swing connecting bar is connected with oscillating cylinder.Multiphase flow spout 1 and housing 8 are flexibly connected, and pass through oscillating cylinder and the work of swing connecting bar
There is the swing angle of 15-20 degree with, multiphase flow spout 1, to improve caught fire to flameholding operating mode and burning fire point
Control.
The oral area of top concentrated phase spout 9, the light phase spout 10 in bottom and the heat-resisting spout 11 of middle part metal is equipped with breeze airflow
Diffuser plate.Breeze airflow diffuser plate is and horizontal plane is in the 30-45 ° of hang plate for spending angle of inclination.Breeze airflow diffuser plate can
The diffusion angle of breeze airflow is improved, to improve combustion efficiency.
Multiphase flow spout 1 mainly includes medium temperature auxiliary wind heat resistant and wear resistant damage composition metal vent component, with 30-45 °
The breeze airflow diffuser plate of angle, top one time dense phase pulverized coal spout, bottom once light phase coal dust spout and swing mechanism five
Part-structure part.The catch fire control of operating mode and burning fire point of the main flameholding of burner is all optimized by it.
First air coal dust inhales high-temperature flue gas preheating coal dust to reach purpose of catching fire through pulleying, its diffusion angle, bias pulverized coal spout ratio
Different differences is had according to the difference of the fugitive constituent for the coal burnt, calorific value, ash content, alkali metal.
Stable burning bluff body 5 and housing 8 are integral type casting structure.The stable burning monoblock cast of bluff body 5 is being burnt
In device housing 8, structural reliability is good.
The stable burning outer wall of bluff body 5 posts anti-wearing ceramic, to improve the wearability of the stable burning outer wall of bluff body 5, further
Improve structural reliability in ground.
The enclosed construction that stable burning bluff body 5 both sides are and housing 8 is integral type casting, stabilization are burnt after bluff body 5
Portion longitudinal section is triangular structure, stable to burn the inside of bluff body 5 to form the hollow structure of high temperature fluid reflux 6.It is stable
The bluff body 5 that burns is the device similar to ship and the tail shape of aircraft, passes through decrement of the air-flow with flow area and passage
Angle gradient, during Action of Gravity Field and on-way resistance change, concentration, the speed of fluid change, be gradually disengaged for
Deep or light two phase flow, the diffusion of its angle of flare improve the circulating flow strength of high-temperature flue gas, add mass reflux rate.
Temperature measuring equipment 4 is located at the center of face multiphase flow spout 1 in housing 8.The center of multiphase flow spout 1 is
Highest temperature area, temperature measuring equipment 4 are thermocouple temperature measurement element, by the temperature of detection temperature highest zone, to realize burning
The internal temperature control of device, prevents burner from burning out.
Cooling protector 3 is the cooling duct in access housing 8；Cooling wind is entered in housing 8 by cooling duct,
The temperature that can be measured at any time according to temperature measuring equipment 4, to adjust the size of cooling duct air quantity, realize the inside drop of burner
Temperature, to prevent burner from burning out, there is provided reliable cooling protection effect.
The coal burner of current station boiler direct current shade type and precombustion chamber type is complicated, arranges to solve by the present invention
The change of difficult, inadaptable electric coal situation at present, it is small to the accommodation of ature of coal；It is (mixed and disorderly due to carrying out coal, it is desirable to uniformly to mix with ten
Point difficulty, this is bad when good when having resulted in the fire coal into burner hearth) boiler that brings therefrom often has unstable combustion fire extinguishing, knot
Accident and the abnormal conditions such as burnt, burner is burnt out, the abnormal rise of superheater over temperature booster, fly ash combustible material, explosion of Coal Pulverizing System
Generation, power plant's production the problems such as being normally carried out is influenceed, using following technical scheme：
1st, multiphase flow spout 1 is designed, major function is：It is steady that low-volatile fuel gas stream is effectively subjected to effective segmentation
Stream, to reach different combustion function and region；
2nd, design separation pre-burning device 2, major function preheats to the breeze airflow for entering burner, improves it and
Fiery temperature, ignition heat is reduced, makes it to catch fire in advance under relatively low heat absorption capacity；
3rd, Cooling protector 3, the temperature of main function regulation separation pre-burning device 2, anti-locking apparatus scaling loss are designed；
4th, temperature measuring equipment 4 is designed, mainly by detecting temperature, to adjust the air quantity of cooling device；
5th, design empennage-type surely fires bluff body, and major function is to carry out one-level separation to breeze airflow, while improves coal dust and go out
Mouth speed, the uniformity of concentration, advantageously reduce nitrogen oxides；
6th, high temperature fluid reflux 6, major function control igniting temperature of pulverized-coal and control coal powder ignition distance are designed.
Using technical scheme, following beneficial effect can be obtained：
1st, combustion conditions are effectively improved and to strengthen unstable combustion, boiler extinguishment that low-volatile coal occurs in burning existing
As；
2nd, combustion conditions are effectively reduced and strengthen low-volatile coal NO_x formation in burning, are filled using this burning
Put can reduce by 30% nitrogen oxides；
3rd, combustion conditions are effectively reduced and strengthen the low phenomenon of low-volatile coal burn-up efficiency in burning.
The burner is installed on station boiler main burner region, mainly for the using area and model of a coal dust
Enclose；Burnt by multiphase flow spout 1, separate precombustion chamber burning, high temperature fluid reflux 6, empennage-type surely fire bluff body, cooling is protected
The combination of the five Technologies of protection unit 3 so that the burner, which can be stablized, uses fugitive constituent in 10% meager coal once；It can realize
High temperature fluid capacity of returns in separation precombustion chamber, recirculating zone, backflow zone position are precisely controlled and adjusted, makes the burner
The combustion stability of thermal power plant pulverized-coal fired boiler is greatly enhanced, boiler extinguishment can be prevented and prevent burner scaling loss, simultaneously
Effectively improve the security and economy of boiler operatiopn；Thermal power plant pulverized-coal fired boiler can effectively be subtracted using burner operation
Few DS NOx Est.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as employing the methodology and skill of the present invention
The improvement for the various unsubstantialities that art scheme is carried out, within protection scope of the present invention.
Claims (7)
- A kind of 1. stable combusting device for Low Volatile Lean Coal, it is characterised in that：Including housing, connect on the shell one end The multiphase flow spout that can be swung is connected to, the anterior rear portion longitudinal section that connected with the multiphase flow spout is provided with the housing as three The stable burning bluff body of angular structure；The stable burning bluff body is provided with separation pre-burning dress over and under in the housing Put；Temperature measuring equipment and Cooling protector are provided with the housing；Returned inside the stable burning bluff body to form high temperature fluid Flow the hollow structure of device；The separation pre-burning device by it is described it is stable burn formed between bluff body top and shell top wall the The the second separation preheating channel formed between one separation preheating channel and the stable burning bluff body bottom and housing lower wall is formed； The stable burning bluff body and the housing are integral type casting structure.
- 2. it is used for the stable combusting device of Low Volatile Lean Coal as claimed in claim 1, it is characterised in that：The multiphase flow spray Mouth includes top concentrated phase spout, the light phase spout in bottom and between the light phase spout of the top concentrated phase spout and the bottom The heat-resisting spout of middle part metal.
- 3. it is used for the stable combusting device of Low Volatile Lean Coal as claimed in claim 2, it is characterised in that：The multiphase flow spray Mouth is connected with swing connecting bar, and the swing connecting bar is connected with oscillating cylinder.
- 4. it is used for the stable combusting device of Low Volatile Lean Coal as claimed in claim 2, it is characterised in that：The top concentrated phase The oral area of spout, the light phase spout in bottom and the heat-resisting spout of middle part metal is equipped with breeze airflow diffuser plate.
- 5. the stable combusting device for Low Volatile Lean Coal as described in claim any one of 1-4, it is characterised in that：It is described Stable burning bluff body outer wall posts anti-wearing ceramic.
- 6. the stable combusting device for Low Volatile Lean Coal as described in claim any one of 1-4, it is characterised in that：It is described Temperature measuring equipment is located at the center of multiphase flow spout described in face in the housing.
- 7. the stable combusting device for Low Volatile Lean Coal as described in claim any one of 1-4, it is characterised in that：It is described Cooling protector is the cooling duct in the access housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610056893.0A CN105546566B (en) | 2016-01-28 | 2016-01-28 | A kind of stable combusting device for Low Volatile Lean Coal |
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| CN201610056893.0A CN105546566B (en) | 2016-01-28 | 2016-01-28 | A kind of stable combusting device for Low Volatile Lean Coal |
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| CN105546566B true CN105546566B (en) | 2018-03-13 |
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| CN107620978A (en) * | 2016-07-14 | 2018-01-23 | 施政 | A kind of ignition system of large coal powder boiler |
| CN106594711A (en) * | 2016-12-28 | 2017-04-26 | 浙江宜清环境技术有限公司 | Low-nitrogen combustion device for chain furnace |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4294178A (en) * | 1979-07-12 | 1981-10-13 | Combustion Engineering, Inc. | Tangential firing system |
| CN1407274A (en) * | 2001-09-05 | 2003-04-02 | 清华同方股份有限公司 | Coal powder direct supplying burner |
| CN2844679Y (en) * | 2005-11-11 | 2006-12-06 | 成庆刚 | Deep Or Light And Hot Reflux Two-way Smooth Burning Powdered-coal Burner |
| CN101135451A (en) * | 2006-08-29 | 2008-03-05 | 上海理工大学 | Gas recombustion and two-channel thick-light integrated type low NOx combusting device |
| CN202371750U (en) * | 2011-12-08 | 2012-08-08 | 艾佩克斯科技(北京)有限公司 | Pure oxygen ignition device for boiler in power station |
| CN104406164A (en) * | 2014-11-28 | 2015-03-11 | 哈尔滨锅炉厂有限责任公司 | Pulverized lignite homogeneous phase combustor and combustion method |
| CN205424972U (en) * | 2016-01-28 | 2016-08-03 | 浙江宜清环境技术有限公司 | A stable combustion device for hanging down fugitive constituent meager coal |
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Address after: 311100 room 1104, building 1, yuzhicheng, Nanyuan street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Yiqing Environmental Technology Co.,Ltd. Address before: 310000 room 527, floor 5, building 4, No. 16, Kangzhong Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG YIQING ENVIRONMENT TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A stable combustion device for low volatile lean coal Effective date of registration: 20210904 Granted publication date: 20180313 Pledgee: Hangzhou United Rural Commercial Bank Co.,Ltd. Huanglong sub branch Pledgor: Yiqing Environmental Technology Co.,Ltd. Registration number: Y2021330001367 |
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