CN106247322A - The W flame boiler that a kind of weary gas windage yaw is put - Google Patents
The W flame boiler that a kind of weary gas windage yaw is put Download PDFInfo
- Publication number
- CN106247322A CN106247322A CN201610605676.2A CN201610605676A CN106247322A CN 106247322 A CN106247322 A CN 106247322A CN 201610605676 A CN201610605676 A CN 201610605676A CN 106247322 A CN106247322 A CN 106247322A
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- China
- Prior art keywords
- weary
- boiler
- weary gas
- airduct
- gas wind
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Classifications
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- 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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
-
- 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
- F23C2202/00—Fluegas recirculation
- F23C2202/20—Premixing fluegas with fuel
Abstract
The W flame boiler that a kind of weary gas windage yaw is put, the present invention relates to a kind of W flame boiler.The present invention solves use turbulent burner W flame boiler weary gas wind prematurely, directly mix the effect failing to give full play of weary gas wind fractional combustion with the thick coal culm air-flow of undershoot, weaken weary gas wind reduction NOxAbility, cause NOxDischarge capacity high, combustion stability and the problem of coal dust after-flame in low temperature weary gas wind directly washes away the high temperature thick coal culm airflow influence stove of undershoot simultaneously, the solution of the present invention is: each weary pneumatic transmission airduct of W flame boiler is divided into two isometrical weary gas wind arms, two isometrical weary gas wind arm cross-sectional area sums are equal with weary pneumatic transmission airduct cross-sectional area, angle between centrage and the horizontal plane of each weary gas wind arm is the most equal, angle is between 20 °～30 °, each weary gas wind arm is centrally located on same level line, the bottom of weary gas wind arm to the distance of chimney arch lower limb in the range of 2500mm～3000mm.The invention belongs to boiler combustion field.
Description
Technical field
The present invention relates to a kind of boiler, be specifically related to the W flame boiler that a kind of weary gas windage yaw is put.
Background technology
At present, the W flame boiler being disposed with vortex burner on arch occupies certain proportion in China.This employing
The W flame boiler of turbulent burner generally also exists problems with when low volatile coal particularly anthracite.
W flame boiler NOxDischarge capacity is higher, up to 1500～1800mg/m3。NOxAnimal and human body there are is intoxicating effect,
It is one of main matter forming acid rain, is also to form the important substance of photochemical fog in air and destroy atmospheric ozone layer
One key factor.NOxIt is further oxided forming trickle nitrate granules in an atmosphere, is the important sources of haze.
W flame boiler is the relatively low anthracite of volatile matter and meager coal owing to using coal, and coal dust is difficult to after-flame, and flying dust is flammable
Thing content is higher.Unburned combustible in fly ash height can cause boiler incomplete combustion loss to increase, and reduces boiler efficiency.
W flame boiler is due to the complexity of this body structure of boiler and coal-fired flame retardancy, and it is changeable to add ature of coal, causes coal
Powder catches fire difficulty, and combustion instability, especially for peak regulation, unit is in variable load operation frequently, has more increased the weight of burning
Unstability, the unstability of boiler combustion has severely impacted safety and the economy of power plant.
Use the First air breeze airflow of W flame boiler of turbulent burner after turbulent burner enrichment facility,
The First air and 10%～15% coal dust that make 50% are separated, and are directed vertically down onto the spray of weary gas blowout mouth through weary pneumatic transmission airduct
Enter hearth combustion.Weary gas wind snout on arch forward spin flow burner water-cooling wall lower with arch is the most close together, and on
Lower one_to_one corresponding is arranged, weary gas wind so will certainly be made to mix prematurely, directly with the thick coal culm air-flow of undershoot.Weary gas wind
Mix with the thick coal culm air-flow of undershoot prematurely, fail to give full play of the effect of weary gas wind fractional combustion, weaken weary gas wind
Reduce NOxAbility；Cause NOxDischarge capacity too high, pollute environment, it addition, the high temperature that low temperature weary gas wind directly washes away undershoot is dense
Breeze airflow, breeze gas flow temperature reduces, and steady combustion ability declines, and also affects coal dust after-flame simultaneously.
Summary of the invention
The present invention solves use the W flame boiler weary gas wind of turbulent burner prematurely, directly with the dense coal of undershoot
The mixing of powder air-flow fails to give full play of the effect of weary gas wind fractional combustion, weakens weary gas wind and reduces NOxAbility, cause NOx
Discharge capacity is high, pollutes environment；Flameholding in low temperature weary gas wind directly washes away the high temperature thick coal culm airflow influence stove of undershoot simultaneously
Property and the problem of coal dust after-flame, and then the W flame boiler that a kind of weary gas windage yaw puts is provided.
The present invention solves that the problems referred to above adopt the technical scheme that: it includes upper furnace body, lower furnace body, front chimney arch, rear stove
Arch, a 2N weary pneumatic transmission airduct, 4N weary gas wind arm, 2N classification airduct, 2N vortex burner, upper furnace body, lower stove
Body, front chimney arch and rear chimney arch constitute burner hearth, and N number of vortex burner is arranged on front chimney arch, N number of vortex burner cloth
Put on rear chimney arch, and each vortex burner on front chimney arch respectively with a vortex burner on rear chimney arch
Being oppositely arranged, N number of weary pneumatic transmission airduct is arranged on boiler front water wall, each weary pneumatic transmission airduct on boiler front water wall
Lower section is correspondingly provided with a classification airduct, and the bottom of classification airduct is in tilted layout on boiler front water wall, N number of weary pneumatic transmission
Airduct is arranged on boiler rear water wall, and on boiler rear water wall, the lower section of each weary pneumatic transmission airduct is correspondingly provided with one point
Level airduct, and the bottom of classification airduct is in tilted layout on boiler rear water wall, the top of each weary pneumatic transmission airduct with one
Vortex burner seals connection, and the bottom of each weary pneumatic transmission airduct is symmetrically arranged on two with two weary gas wind arms, and two weary
Gas wind arm is all obliquely installed, and the bottom of weary pneumatic transmission airduct connects with the end sealing of two weary gas wind arms, is positioned at boiler
On front water wall, two of weary pneumatic transmission airduct bottom weary gas wind arms connect with boiler front water wall, are positioned at wall water after boiler
In cold wall, two of weary pneumatic transmission airduct bottom weary gas wind arms connect with boiler rear water wall.
The invention has the beneficial effects as follows:
1, the W flame boiler that the windage yaw of the present invention weary gas is put is conducive to coal dust after-flame, strengthens the stability of burning simultaneously.
W flame boiler weary gas pathogenic wind-warm is about 90 DEG C, and the thick coal culm gas flow temperature after catching fire in stove is higher than 1000 DEG C, weary
Gas pathogenic wind-warm is far below the temperature of the thick coal culm air-flow after catching fire.When weary gas wind does not biases, the weary gas wind of lower temperature directly washes away
High temperature thick coal culm air-flow, high temperature thick coal culm gas flow temperature reduces, and totally unfavorable to the after-flame of coal dust, coal dust stably burns simultaneously
Ability declines；Weary gas windage yaw postpones, weary gas wind is gradually mixed in the both sides of the thick coal culm air-flow of undershoot, it is to avoid lower temperature
Weary gas wind directly washes away high temperature thick coal culm air-flow, and the after-flame of coal dust can be greatly improved, the stability of coal dust firing in boiler
Also it is enhanced.Especially, when boiler is in underrun, in stove, Thermal load of cross-section and volume heat load all reduce, pot
The stability of stove burning is the poorest, if the weary gas wind of lower temperature the most directly washes away high temperature thick coal culm air-flow, certainly will aggravate
In stove, the unstability of burning, now, has more highlighted steady combustion effect when boiler at low load is run by biasing weary gas wind.
2, the W flame boiler that the windage yaw of the present invention weary gas is put can reduce boiler NO furtherxDischarge.
Weary gas wind after biasing is gradually mixed into from the both sides of the thick coal culm air-flow of undershoot, between weary gas wind and thick coal culm air-flow
Mixing be a process progressively mixed, after being incident upon certain depth to thick coal culm air-flow, weary gas wind is just and thick coal culm air-flow
Mixing completely, changes original weary gas wind and is mixed into the mode of thick coal culm air-flow too early, extend the thick coal culm air-flow of undershoot lean
The time of burning in oxygen atmosphere, weary gas windage yaw is put and is inhibited NOxGeneration, and then ensure ecological environment not by NOxPollution.
Accompanying drawing explanation
Fig. 1 is overall structure front view of the present invention, and Fig. 2 is that weary pneumatic transmission airduct 3, weary gas wind arm 4, classification airduct 5 are arranged
At boiler front water wall 9 or be arranged in the schematic diagram on boiler rear water wall 10.
Detailed description of the invention
Detailed description of the invention one: combine Fig. 1-Fig. 2 and present embodiment is described, a kind of weary gas windage yaw described in present embodiment is put
W flame boiler, it includes upper furnace body 1, lower furnace body 2, front chimney arch 7, rear chimney arch 8,2N weary pneumatic transmission airduct 3, a 4N weary gas wind
Arm 4,2N classification airduct 5,2N vortex burner 6, upper furnace body 1, lower furnace body 2, front chimney arch 7 and rear chimney arch 8 are constituted
Burner hearth, N number of vortex burner 6 is arranged on front chimney arch 7, and N number of vortex burner 6 is arranged in " one " font, N number of
Vortex burner 6 is arranged on rear chimney arch 8, and N number of vortex burner 6 is arranged in " one " font, and on front chimney arch 7
Each vortex burner 6 be oppositely arranged with a vortex burner 6 on rear chimney arch 8 respectively, N number of weary pneumatic transmission wind
Pipe 3 is arranged on boiler front water wall 9, and on boiler front water wall 9, the lower section of each weary pneumatic transmission airduct 3 is correspondingly provided with one
Classification airduct 5, and the bottom of classification airduct 5 is in tilted layout on boiler front water wall 9, N number of weary pneumatic transmission airduct 3 is arranged on pot
On stove rear water wall 10, on boiler rear water wall 10, the lower section of each weary pneumatic transmission airduct 3 is correspondingly provided with a classification airduct
5, and the bottom of classification airduct 5 is in tilted layout on boiler rear water wall 10, the top of each weary pneumatic transmission airduct 3 and a rotation
Flow coal-powder combustor 6 seals connection, and the bottom of each weary pneumatic transmission airduct 3 is symmetrically arranged on two with two weary gas wind arms 4, and two weary
Gas wind arm 4 is all obliquely installed, and the bottom of weary pneumatic transmission airduct 3 connects with the end sealing of two weary gas wind arms 4, is positioned at pot
On stove front water wall 9, two of weary pneumatic transmission airduct 3 bottom weary gas wind arms 4 connect with boiler front water wall 9, are positioned at boiler
On rear water wall 10, two of weary pneumatic transmission airduct 3 bottom weary gas wind arms 4 connect with boiler rear water wall 10.
Detailed description of the invention two: combine Fig. 1-Fig. 2 and present embodiment is described, a kind of weary gas windage yaw described in present embodiment is put
W flame boiler, described in be arranged on boiler front water wall 9 formed by the centrage of each weary gas wind arm 4 and horizontal plane
Angle is α, and being arranged on the centrage of each weary gas wind arm 4 and horizontal plane angulation on boiler rear water wall 10 is β,
The numerical value of α is equal with the numerical value of β, and the span of α is 20 °-30 °, other composition and annexation and detailed description of the invention one
Identical.
Detailed description of the invention three: combine Fig. 1-Fig. 2 and present embodiment is described, a kind of weary gas windage yaw described in present embodiment is put
W flame boiler, on boiler front water wall 9, the bottom of each weary gas wind arm 4 to the distance of front chimney arch 7 bottom is L1, pot
On stove rear water wall 10, the distance of the bottom of each weary gas wind arm 4 to rear chimney arch 8 bottom is L2,L2Numerical value and L1Number
It is worth equal, and L1Span be 2500mm-3000mm, other composition and annexation identical with detailed description of the invention two.
Detailed description of the invention four: combine Fig. 1-Fig. 2 and present embodiment is described, a kind of weary gas windage yaw described in present embodiment is put
W flame boiler, the cross-sectional area of described each weary pneumatic transmission airduct 3 and weary pneumatic transmission airduct 3 low side are installed two weary gas wind and are propped up
Pipe 4 cross-sectional area and equal, other composition and annexation are identical with detailed description of the invention one.
Operation principle
The First air thick coal culm air-flow of arch forward spin flow burner is constantly mixed into secondary wind during undershoot, dense after catching fire
Breeze airflow is after descending certain depth, and the weary gas wind after biasing is gradually mixed into from the both sides of the thick coal culm air-flow of undershoot, weary gas
Mixing between wind and thick coal culm air-flow is a process progressively mixed, after being incident upon certain depth to thick coal culm air-flow, weary
Gas wind is just and the mixing of thick coal culm air-flow is complete.Weary gas windage yaw postpones, it is to avoid it is dense that the weary gas wind of lower temperature directly washes away high temperature
Breeze airflow, the after-flame of coal dust can be greatly improved, and in boiler, the stability of coal dust firing is also enhanced.Weary gas windage yaw is put
After, extending the time that the thick coal culm air-flow of undershoot burns in oxygen-lean atmosphere, weary gas windage yaw is put and is inhibited NOxGeneration.
Embodiment
This example is that a 300MW W flame boiler is carried out in-site measurement and hot numerical simulation, uses actual measurement
The contrast of value and numerical simulation proves the reliability of analog result, before weary gas windage yaw is put, each weary gas wind on front-back wall water-cooling wall
Burner in vertical direction one_to_one corresponding upper with arch is arranged, the NO of boilerxThe in-site measurement value of discharge capacity and numerical simulation
It is respectively 1300mg/m3And 1327mg/m3, NOxThe numerical simulation error of discharge capacity is 2.1%, and unburned combustible in fly ash scene is surveyed
Value and numerical simulation are respectively 11.7% and 12.1%, and this shows that the credibility of result of numerical simulation is higher.Use this instead
After the combustion method that a kind of weary gas windage yaw in invention is put, the NO that numerical simulation drawsxDischarge capacity reduces to 912mg/m3, fly
The flammable content of ash is 9.5%, and this absolutely proves that the burning arrangement that a kind of weary gas windage yaw that the present invention provides is put can significantly drop
Low NOxDischarge and unburned combustible in fly ash.
Claims (4)
1. the W flame boiler that a weary gas windage yaw is put, it is characterised in that: it includes upper furnace body (1), lower furnace body (2), front chimney arch
(7), rear chimney arch (8), 2N weary pneumatic transmission airduct (3), 4N weary gas wind arm (4), 2N classification airduct (5), 2N eddy flow coal
Powder burner (6), upper furnace body (1), lower furnace body (2), front chimney arch (7) and rear chimney arch (8) constitute burner hearth, N number of spiral-flow powdered coal burning
Device (6) is arranged on front chimney arch (7), and N number of vortex burner (6) is arranged on rear chimney arch (8), and on front chimney arch (7)
Each vortex burner (6) is oppositely arranged with a vortex burner (6) on rear chimney arch (8) respectively, N number of weary gas
Ajutage (3) is arranged on boiler front water wall (9), the lower section of the upper each weary pneumatic transmission airduct (3) of boiler front water wall (9)
It is correspondingly provided with a classification airduct (5), and the bottom of classification airduct (5) is in tilted layout on boiler front water wall (9), N number of
Weary pneumatic transmission airduct (3) is arranged on boiler rear water wall (10), the upper each weary pneumatic transmission airduct (3) of boiler rear water wall (10)
Lower section be correspondingly provided with a classification airduct (5), and the bottom of classification airduct (5) is in tilted layout in boiler rear water wall (10)
On, the top of each weary pneumatic transmission airduct (3) seals with a vortex burner (6) and connects, each weary pneumatic transmission airduct (3)
Bottom is symmetrically arranged on two with two weary gas wind arm (4), and two weary gas wind arm (4) are all obliquely installed, and weary pneumatic transmission airduct (3)
Bottom connect with the end sealing of two weary gas wind arm (4), be positioned at the upper weary pneumatic transmission airduct (3) of boiler front water wall (9)
Two weary gas wind arm (4) of bottom connect with boiler front water wall (9), are positioned at the upper weary pneumatic transmission of boiler rear water wall (10)
Two weary gas wind arm (4) of airduct (3) bottom connect with boiler rear water wall (10).
The W flame boiler that a kind of weary gas windage yaw is put, it is characterised in that before being arranged in boiler described in:
The centrage of upper each weary gas wind arm (4) of wall water-cooling wall (9) is α with horizontal plane angulation, is arranged in wall water after boiler
The centrage of upper each weary gas wind arm (4) of cold wall (10) and the numerical value numerical value phase with β that horizontal plane angulation is β, α
Deng, the span of α is 20 °-30 °.
The W flame boiler that a kind of weary gas windage yaw is put, it is characterised in that: boiler front water wall (9)
The distance of bottom to front chimney arch (7) bottom of upper each weary gas wind arm (4) is L1, boiler rear water wall (10) is upper each weary
The distance of the bottom of gas wind arm (4) to rear chimney arch (8) bottom is L2,L2Numerical value and L1Numerical value equal, and L1Value model
Enclose for 2500mm-3000mm.
The W flame boiler that a kind of weary gas windage yaw is put, it is characterised in that: each weary pneumatic transmission airduct (3)
Cross-sectional area gas wind arm (4) cross-sectional area weary with two that weary pneumatic transmission airduct (3) low side is arranged and equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610605676.2A CN106247322B (en) | 2016-07-28 | 2016-07-28 | The W flame boiler that a kind of lack of gas windage yaw is put |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610605676.2A CN106247322B (en) | 2016-07-28 | 2016-07-28 | The W flame boiler that a kind of lack of gas windage yaw is put |
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| CN106247322A true CN106247322A (en) | 2016-12-21 |
| CN106247322B CN106247322B (en) | 2018-04-24 |
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| CN201610605676.2A Active CN106247322B (en) | 2016-07-28 | 2016-07-28 | The W flame boiler that a kind of lack of gas windage yaw is put |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543151A (en) * | 2017-09-12 | 2018-01-05 | 哈尔滨工业大学 | A kind of W flame boiler for the flue gas recirculation system that can improve coal dust after-flame |
| CN107606605A (en) * | 2017-09-12 | 2018-01-19 | 哈尔滨工业大学 | A kind of W flame boiler using flue gas recycled |
| CN108180469A (en) * | 2018-02-12 | 2018-06-19 | 东方电气集团东方锅炉股份有限公司 | A kind of method and apparatus for adjusting steam temperature using burner or milling waste steam processed |
| CN109945164A (en) * | 2019-03-11 | 2019-06-28 | 哈尔滨工业大学 | A kind of W flame boiler preventing fluid field in furnace deflection using flue gas recycled |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543151A (en) * | 2017-09-12 | 2018-01-05 | 哈尔滨工业大学 | A kind of W flame boiler for the flue gas recirculation system that can improve coal dust after-flame |
| CN107606605A (en) * | 2017-09-12 | 2018-01-19 | 哈尔滨工业大学 | A kind of W flame boiler using flue gas recycled |
| CN107606605B (en) * | 2017-09-12 | 2019-04-09 | 哈尔滨工业大学 | A kind of W flame boiler using flue gas recycled |
| CN107543151B (en) * | 2017-09-12 | 2019-06-11 | 哈尔滨工业大学 | A kind of W flame boiler for the flue gas recirculation system can be improved coal dust after-flame |
| CN108180469A (en) * | 2018-02-12 | 2018-06-19 | 东方电气集团东方锅炉股份有限公司 | A kind of method and apparatus for adjusting steam temperature using burner or milling waste steam processed |
| CN108180469B (en) * | 2018-02-12 | 2023-07-14 | 东方电气集团东方锅炉股份有限公司 | Method and device for adjusting steam temperature by using burner or powder process exhaust gas |
| CN109945164A (en) * | 2019-03-11 | 2019-06-28 | 哈尔滨工业大学 | A kind of W flame boiler preventing fluid field in furnace deflection using flue gas recycled |
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