CN109140428A - A kind of circle of contact pulverized coal decoupling combustor group, burner and combustion method - Google Patents
A kind of circle of contact pulverized coal decoupling combustor group, burner and combustion method Download PDFInfo
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- CN109140428A CN109140428A CN201710446983.5A CN201710446983A CN109140428A CN 109140428 A CN109140428 A CN 109140428A CN 201710446983 A CN201710446983 A CN 201710446983A CN 109140428 A CN109140428 A CN 109140428A
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- air port
- overfire air
- wind snout
- overfire
- group
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- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000009841 combustion method Methods 0.000 title claims abstract description 5
- 210000004894 snout Anatomy 0.000 claims abstract description 62
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 239000002817 coal dust Substances 0.000 claims abstract description 16
- 238000010304 firing Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000001603 reducing effect Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 210000000038 chest Anatomy 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 240000007232 Illicium verum Species 0.000 description 2
- 235000008227 Illicium verum Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of pulverized coal decoupling combustor group and decoupling combustion devices, including overfire air port and fire air nozzle in several wind snout, bottom overfire air port, intermediate overfire air port, several layers, a wind snout is the arrangement that is arranged above and below；The intermediate overfire air port includes multiple spouts being set between a wind snout；The bottom overfire air port is set to the underface of minimum one layer of wind snout, the upper overfire air port is continuously set to the surface of wind snout of maximum layer, the fire air nozzle is one layer or more, and the fire air nozzle is set to the top of overfire air port；The outlet flow sectional area of the intermediate overfire air port accounts for the 20%~60% of the sum of outlet flow sectional area of all intermediate overfire air ports and upper overfire air port.The invention also discloses the combustion methods using decoupling combustion device.The present invention can make the burner group of coal dust decoupling combustion device install transformation that is more compact, and adapting to existing boiler.
Description
Technical field
The present invention relates to coal-dust combustion device fields, in particular it relates to what a kind of First air Relatively centralized was arranged
Circle of contact pulverized coal decoupling combustor group, burner and combustion method.
Background technique
There are coupled problem, the row for reducing NOx using Researched of Air Staging Combustion Burning Pulverized Coal is usual for the efficiency of coal dust firing and the discharge of NOx
Efficiency of combustion can be made also to reduce.Researched of Air Staging Combustion Burning Pulverized Coal causes lower furnace portion to form large-scale strong reducing property atmosphere simultaneously, so that
The High Temperature Corrosion of burner hearth coking and water-cooling wall is prominent.
One kind, which is proposed, application No. is the Chinese patent application of CN2016202288516 flows polygonal circle of contact coal dust decoupling combustion
The technical solution for burning device, preferably solves the coupled problem of efficiency of combustion and NOx emission.But the program is in order to realize level
Classification, so that First air is arranged apart with overfire air port, increases the complexity of furnace wall cooling and air channel structure, is more suitable for
In the manufacture of new boiler, the cost for carrying out Reconstruction in field to former design boiler is very high.
Summary of the invention
In order to overcome the defect for being transformed higher cost for existing boiler in the prior art, solve efficiency of combustion with
The coupled problem of NOx emission, the present invention provides a kind of First air Relatively centralized arrangement circle of contact pulverized coal decoupling combustor group and
Burner.
The present invention provides a kind of pulverized coal decoupling combustor groups, including several wind snout, bottom overfire air port,
Overfire air port and fire air nozzle on intermediate overfire air port, several layers；Wind snout is the arrangement that is arranged above and below；Institute
Stating intermediate overfire air port includes multiple spouts being set between a wind snout；The bottom overfire air port is set to most
The underface of low one layer of wind snout, the upper overfire air port be continuously set to wind snout of maximum layer just on
Side, the fire air nozzle are one layer or more, and the fire air nozzle is set to the top of overfire air port；The centre two
The outlet flow sectional area of secondary wind snout account for all intermediate overfire air ports and upper overfire air port outlet flow sectional area it
The 20%~60% of sum.
As a kind of upper better choice of pulverized coal decoupling combustor group, the intermediate overfire air port and the First air spray
The alternate arrangement of mouth；Or an overfire air port is set between every 2 to 3 adjacent one time wind snout,
As a kind of upper better choice of pulverized coal decoupling combustor group, the fire air nozzle is set to overfire air port
Surface, between the spacing of the bottom fire air nozzle and top layer's overfire air port is greater than between upper overfire air port
Away from.The overfire air port can be with spaced set, can also be with non-spaced set, when the non-spaced set of overfire air port
When, the spacing of the bottom fire air nozzle and top layer's overfire air port is greater than the average headway between upper overfire air port.
As above-mentioned another better choice of pulverized coal decoupling combustor group, the fire air nozzle is two or more,
A portion is greater than 5 times of upper overfire air port height with the spacing of upper overfire air port in the horizontal direction, in Vertical Square
The spacing being more than or equal to upwards with the spacing of the upper overfire air port 4 of top layer between upper overfire air port 4.
As a kind of above-mentioned better choice of pulverized coal decoupling combustor group, the upper overfire air port and fire air nozzle are
Horizontally or vertically two-way swing mechanism.
As a kind of above-mentioned better choice of pulverized coal decoupling combustor group, a wind snout and intermediate overfire air port are constituted
The swing mechanism of one wind snout group, each spout of a wind snout group is connected.Using this design, may make
Each wind snout can be made uniformly to do vertical oscillation by controlling swing mechanism.
As a kind of above-mentioned better choice of pulverized coal decoupling combustor group, Secondary Air sprays on several of each burner group
Mouth constitutes overfire air port group on one, and the swing mechanism of each spout of the upper overfire air port group is connected.It is set using this
Meter, can make each upper overfire air port uniformly do vertical oscillation by swing mechanism.
As a kind of above-mentioned better choice of pulverized coal decoupling combustor group, the intermediate overfire air port and a wind snout
The incidence angle angle of directive burner hearth be 0~30 degree.
As a kind of above-mentioned better choice of pulverized coal decoupling combustor group, the intermediate overfire air port and a wind snout
Directive burner hearth incidence angle formed imaginary circle direction of rotation it is opposite.
As a kind of above-mentioned better choice of pulverized coal decoupling combustor group, the burner group further comprises lack of gas and three
Secondary wind snout, setting between a wind snout and intermediate overfire air port or wind snout top of top layer and close to
Wind snout.
The present invention also provides a kind of circle of contact coal dust decoupling combustion devices comprising several groups burner group above-mentioned, institute
State that the horizontal absolute altitude of burner group is identical to be arranged in tangential firing Pulverized Coal fired Boiler Furnace.The spout of the burner group sprays gas
Flow angle can be had disclosed in freeze profile at the swirling eddy of tangential firing, specific angle design using the prior art
Means.
As a kind of above-mentioned better choice of circle of contact coal dust decoupling combustion device, the burner group number is 4, arrangement
Quadrangle or four walls in tangential firing Pulverized Coal fired Boiler Furnace.
As a kind of above-mentioned better choice of circle of contact coal dust decoupling combustion device, the burner group number is 8, arrangement
In the illiciumverum of tangential firing Pulverized Coal fired Boiler Furnace.
When being suitable for different tangential firing furnaces, the number for the burner group that can be introduced by change, to realize
Decoupling burning guarantees the after-flame of combustible.
The present invention also provides a kind of methods of decoupling burning, comprising:
Air-flow into burner hearth enters the air-flow risen in freeze profile at rotation after burner hearth, and one time wind snout carries coal dust
Into hearth combustion, intermediate overfire air port supplement part combustion air is mixed with First air, as mixed airflow rises, upper two
Secondary wind snout continues to supplement combustion air, gradually makes the excess air coefficient of mixed airflow reach 0.75~1.0, burnout degree spray
Mouth supplements remaining after-flame air, keeps combustible combustion in flue gas abundant.In general, the spout of arrangement is only at full capacity
When just all put into operation, part spout is only put under normal circumstances, but as common sense, circle of contact coal dust decoupling combustion device
All spouts of middle investment concur to form the air-flow that rotation rises.
Since First air Relatively centralized is arranged in lower furnace portion, and there is a small amount of intermediate secondary air combustion aid, lower furnace portion can be made
Stronger reducing atmosphere and advantageous steady combustion condition are formed, and combustion intensity is limited by intermediate secondary air flow.Using along furnace
The upper Secondary Air that thorax height is continuously arranged controls combustion intensity and process, keep coal-char combustion under reducing atmosphere continuously into
Row, can be greatly reduced flue gas part oxygen content, to inhibit the generation of fuel type and thermal NO x.Due to completing fuel in time
The conversion of nitrogen can make burnout and be unfolded early in high-temperature oxydation area, and combustible is sufficiently mixed with oxygen, it is ensured that the combustion of combustible
To the greatest extent.
The diameter of imaginary circle is adjusted in spout horizontal hunting, optimizes aerodynamic field, avoids burner hearth coking；Spout vertical oscillation
Adjustable furnace outlet gas temperature, to adjust boiler reheat steam temperature etc.；Fire air nozzle horizontal hunting can be with regulating stove
The temperature deviation of thorax exiting flue gas, it is ensured that the safety of heating surface.
As a kind of better choice of the above method, the bottom Secondary Air sprays 1 total blast volume and accounts for total blast volume in burner hearth
10%~20%；The total blast volume of the intermediate overfire air port accounts for 15%~45% of total blast volume in burner hearth；The upper Secondary Air
The total blast volume of spout accounts for 15%~50% of total blast volume in burner hearth；The total blast volume of the fire air nozzle accounts for total blast volume in burner hearth
10%~40%.
The present invention has the advantage that:
1, the present invention can make the installation of burner group more compact, reduce furnace wall cooling position of opening and simplify the cloth in air duct
It sets, significantly reduces manufacturing cost, and adapt to the transformation of existing boiler.
2, each wind snout group and upper overfire air port group can respectively swing adjustment in the present invention, increase power
The flexibility that field and furnace temperature are adjusted, also can reduce the abrasion of a wind snout.
3, the downward Relatively centralized of First air is disposed with the coal dust combustion for being conducive to steady combustion and increasing top layer's First air in the present invention
Burn the time；A small amount of intermediate Secondary Air can limit lower combustion intensity (coal dust firing ratio) in the case where ensureing sustained combustion, and maintain
Semicoke reactivity appropriate；Secondary Air is reduced between First air to be disposed with conducive to low-load combustion-stabilizing and volatile matter NOx is inhibited to generate；
Upper Secondary Air, which is continuously disposed with, is conducive to the quickly continuous conversion under optimum reducing atmosphere of control coke nitrogen, starts early anti-
The semicoke after-flame stage for answering activity to reduce, and avoid the step for entering generation oxygen amount and NOx in burner hearth with burnout degree.This hair
It is bright can be in the case where ensureing efficiency of combustion, more greatly than conventional air classification technique steady decrease NOx emission, very for bituminous coal etc.
Equipment for denitrifying flue gas can extremely be fully phased out.
Detailed description of the invention
The structural schematic diagram of Fig. 1, decoupling burning device group of the invention；
The top view of Fig. 2, decoupling burning device group of the invention；
Attached drawing mark:
1, bottom overfire air port；2, a wind snout；3, intermediate overfire air port；4, upper overfire air port；5, after-flame
Wind snout.
Specific embodiment
As follows in conjunction with the embodiments to the present invention carry out only with explanation, only use explanation of the invention and not limit.
Referring to Figure 1-2, the present invention provides a kind of pulverized coal decoupling combustor groups, comprising: several wind snout 2,
Bottom overfire air port 1, intermediate overfire air port 3, overfire air port 4 and fire air nozzle 5 in several layers；The First air spray
Mouth 2 is the arrangement that is arranged above and below；The intermediate overfire air port 3 includes multiple spouts being set between a wind snout 2；It is described
Bottom overfire air port 1 is set to the underface of 2 spout of minimum one layer of First air, and the upper overfire air port 4 is continuously set to
The surface of 2 spout of maximum layer First air, the fire air nozzle 5 are one layer or more, and the fire air nozzle is set to
The top of overfire air port；The outlet flow sectional area of the intermediate overfire air port accounts for all intermediate overfire air ports and upper two
The 20%~60% of the sum of the outlet flow sectional area of secondary wind snout.
Intermediate overfire air port arrangement alternate with a wind snout；Or every 2 to 3 adjacent one time wind snout
Between be arranged an overfire air port.
The fire air nozzle may be disposed at the surface of overfire air port, the bottom fire air nozzle and top layer
The spacing of overfire air port is greater than the spacing between upper overfire air port.Burnout degree total height can be reduced using this design, increased
Burnout degree is in following Mixed Zone, to be quickly uniformly mixed, increases after-flame degree.
When the fire air nozzle is more than two, a portion be arranged in most upper one layer upper overfire air port just on
Side, and be greater than 5 times of upper overfire air port height with the spacing of upper overfire air port in the horizontal direction, in vertical direction with
The spacing of the upper overfire air port 4 of top layer is more than or equal to the spacing between upper overfire air port 4.Combustion can be reduced using this design
Wind total height to the greatest extent increases burnout degree in following Mixed Zone, to be quickly uniformly mixed, increases after-flame degree.
The upper overfire air port and fire air nozzle are horizontally or vertically two-way swing mechanism.
Optionally, a wind snout and intermediate overfire air port constitute a wind snout group, described primary
The swing mechanism of wind snout group is connected.Using this design, may make can make each wind snout by controlling swing mechanism
Uniformly do vertical oscillation.
Optionally, overfire air port constitutes overfire air port group on one on several of each burner group, it is described on
The swing mechanism of overfire air port group is connected.Using this design, each upper overfire air port system can be made by swing mechanism
One does vertical oscillation.
Optionally, the incidence angle angle of the directive burner hearth of the intermediate overfire air port and a wind snout is 0~30 degree.
Optionally, the imaginary circle that the incidence angle of the directive burner hearth of the intermediate overfire air port and a wind snout is formed
Direction of rotation is opposite.On the mixing opportunity that controllable First air and Secondary Air are designed using this, reduce the generation of volatile matter NOx.One
Secondary air counter-flow is to extend the mixing of First air and Secondary Air to (influence aerodynamic field) in the case where controlling imaginary circle diameter.
Optionally, the burner group further comprises lack of gas and wind snout three times, and setting is in a wind snout in
Between between overfire air port or wind snout top of top layer and close to a wind snout.
Based on above-mentioned burner group, the present invention also provides a kind of circle of contact coal dust decoupling combustion devices comprising several
Group burner group above-mentioned, the horizontal absolute altitude of burner group is identical to be arranged in tangential firing Pulverized Coal fired Boiler Furnace.
The burner group number can be 4, be arranged in quadrangle or four walls of tangential firing Pulverized Coal fired Boiler Furnace.
The burner group number may be 8, be arranged in the illiciumverum of tangential firing Pulverized Coal fired Boiler Furnace.
When being suitable for different tangential firing furnaces, the number for the burner group that can be introduced by change, to realize
Decoupling burning guarantees the after-flame of combustible, and the number of such as burner group can be 5-7.
The method for carrying out decoupling burning based on above-mentioned burner group and circle of contact coal dust decoupling combustion device, comprising:
The air-flow that rotation rises, a wind snout are formed in burner hearth under interaction by the air-flow that each spout enters burner hearth
It carries coal dust and enters hearth combustion, intermediate overfire air port supplement part combustion air is mixed with First air, with mixed airflow
Rise, upper overfire air port continues to supplement combustion air, gradually make the excess air coefficient of mixed airflow reach 0.75~
1.0, fire air nozzle supplements remaining after-flame air, keeps combustible combustion in flue gas abundant.The bottom Secondary Air sprays total wind
Amount accounts for 10%~20% of total blast volume in burner hearth；The total blast volume of the intermediate overfire air port account for total blast volume in burner hearth 15%~
45%；The total blast volume of the upper overfire air port accounts for 15%~50% of total blast volume in burner hearth；Total wind of the fire air nozzle
Amount accounts for 10%~40% of total blast volume in burner hearth.
Since First air Relatively centralized is arranged in lower furnace portion, and there is a small amount of intermediate secondary air combustion aid, lower furnace portion can be made
Stronger reducing atmosphere and advantageous steady combustion condition are formed, and combustion intensity is limited by intermediate secondary air flow.Using along furnace
The upper Secondary Air that thorax height is continuously arranged controls combustion intensity and process, keep coal-char combustion under reducing atmosphere continuously into
Row, can be greatly reduced flue gas part oxygen content, to inhibit the generation of fuel type and thermal NO x.Due to completing fuel in time
The conversion of nitrogen can make burnout and be unfolded early in high-temperature oxydation area, and combustible is sufficiently mixed with oxygen, it is ensured that the combustion of combustible
To the greatest extent.
The diameter of imaginary circle is adjusted in spout horizontal hunting, optimizes aerodynamic field, avoids burner hearth coking；Spout vertical oscillation
Adjustable furnace outlet gas temperature, to adjust boiler reheat steam temperature etc.；Fire air nozzle horizontal hunting can be with regulating stove
The temperature deviation of thorax exiting flue gas, it is ensured that the safety of heating surface.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (10)
1. a kind of pulverized coal decoupling combustor group, including several wind snout, bottom overfire air port, intermediate Secondary Air spray
Overfire air port and fire air nozzle on mouth, several layers, it is characterised in that:
Wind snout is the arrangement that is arranged above and below；The intermediate overfire air port include it is multiple be set to a wind snout it
Between spout；The bottom overfire air port is set to the underface of minimum one layer of wind snout, the upper overfire air port
It is continuously set to the surface of wind snout of maximum layer, the fire air nozzle is one layer or more, the fire air nozzle
It is set to the top of overfire air port；
The outlet flow sectional area of the intermediate overfire air port accounts for going out for all intermediate overfire air ports and upper overfire air port
The 20%~60% of the sum of mouth cross-sectional flow area.
2. pulverized coal decoupling combustor group according to claim 1, which is characterized in that the intermediate overfire air port with it is described
The alternate arrangement of wind snout；Or an overfire air port is set between every 2 to 3 adjacent one time wind snout.
3. pulverized coal decoupling combustor group according to claim 1, which is characterized in that the fire air nozzle is set to two
The spacing of the surface of secondary wind snout, the bottom fire air nozzle and top layer's overfire air port be greater than upper overfire air port it
Between spacing.
4. pulverized coal decoupling combustor group according to claim 1, which is characterized in that the fire air nozzle be two with
On, a portion is greater than 5 times of upper overfire air port height with the spacing of upper overfire air port in the horizontal direction, vertical
It is more than or equal to the spacing between upper overfire air port with the spacing of the upper overfire air port of top layer on direction.
5. pulverized coal decoupling combustor group according to claim 1, which is characterized in that a wind snout and intermediate Secondary Air spray
Mouth constitutes a wind snout group, and the swing mechanism of each spout of a wind snout group is connected.
6. pulverized coal decoupling combustor group according to claim 1, which is characterized in that two on several of each burner group
Secondary wind snout constitutes overfire air port group on one, and the swing mechanism of each spout of the upper overfire air port group is connected.
7. pulverized coal decoupling combustor group according to claim 1, which is characterized in that the intermediate overfire air port and primary
The incidence angle angle of the directive burner hearth of wind snout is 0~30 degree.
8. pulverized coal decoupling combustor group according to claim 1, which is characterized in that the burner group further comprises weary
Gas and three times wind snout, setting is between a wind snout and intermediate overfire air port or wind snout top of top layer
And close to a wind snout.
9. a kind of circle of contact coal dust decoupling combustion device comprising any burner group of several groups claim 1-8, it is described
The horizontal absolute altitude of burner group is arranged in the same manner in tangential firing Pulverized Coal fired Boiler Furnace.
10. a kind of combustion method based on decoupling combustion device described in claim 9, comprising:
Air-flow enters the air-flow risen in freeze profile at rotation after burner hearth, and a wind snout carries coal dust and enters hearth combustion,
Intermediate overfire air port supplement part combustion air is mixed with First air, and as mixed airflow rises, upper overfire air port continues
Combustion air is supplemented, gradually makes the excess air coefficient of mixed airflow reach 0.75~1.0, fire air nozzle supplement is remaining
After-flame air keeps combustible combustion in flue gas abundant；
The bottom Secondary Air spray total blast volume accounts for 10%~20% of total blast volume in burner hearth；Total wind of the intermediate overfire air port
Amount accounts for 15%~45% of total blast volume in burner hearth；The total blast volume of the upper overfire air port account for total blast volume in burner hearth 15%~
50%；The total blast volume of the fire air nozzle accounts for 10%~40% of total blast volume in burner hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710446983.5A CN109140428B (en) | 2017-06-14 | 2017-06-14 | Tangential coal dust decoupling burner set, combustion device and combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710446983.5A CN109140428B (en) | 2017-06-14 | 2017-06-14 | Tangential coal dust decoupling burner set, combustion device and combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109140428A true CN109140428A (en) | 2019-01-04 |
| CN109140428B CN109140428B (en) | 2024-03-26 |
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| CN103216821A (en) * | 2013-04-27 | 2013-07-24 | 东方电气集团东方锅炉股份有限公司 | Multi-stage stratified combustion system and method for primary air and secondary air of boiler |
| CN205535763U (en) * | 2016-02-04 | 2016-08-31 | 大唐(北京)能源管理有限公司 | Angie type tangential firing pulverized coal boiler's burner |
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