CN206739285U - A kind of swirling pulverized coal combustion device using full burner hearth multistage combustion - Google Patents
A kind of swirling pulverized coal combustion device using full burner hearth multistage combustion Download PDFInfo
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- CN206739285U CN206739285U CN201621094518.7U CN201621094518U CN206739285U CN 206739285 U CN206739285 U CN 206739285U CN 201621094518 U CN201621094518 U CN 201621094518U CN 206739285 U CN206739285 U CN 206739285U
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- China
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- level
- air port
- burner hearth
- pulverized coal
- overfiren
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Abstract
The utility model proposes a kind of swirling pulverized coal combustion device using full burner hearth multistage combustion, wind snout is connected with First air passage, the First air channel interior is provided with pulverized coal concentrator, the one-level overfiren air port is on the outside of a wind snout, the two level overfiren air port is on the outside of one-level overfiren air port, the three-level overfiren air port is in burner hearth, and maintained a certain distance with two level overfiren air port, the axially adjustable blade is in the inside of two level overfiren air port, and the radial blade is in the inside of one-level overfiren air port.The utility model realizes bias combustion mechanism using pulverized coal concentrator to suppress NO firstXGeneration, then air classification low-temperature burning is realized by the feeding step by step of Secondary Air, make flame along journey NOXPercent reduction greatly improve, coke burn-off rate greatly improves, can be achieved efficiency of combustion do not reduce, burner hearth noncoking, outlet gas temperature windage minor premise under NOXCompared with low emission.
Description
Technical field
It the utility model is related to a kind of coal powder burner, more particularly to a kind of eddy flow coal using full burner hearth multistage combustion
Powder burner.
Background technology
The vortex burner that domestic industry boiler and station boiler use at present, some design on do not take it is low
NOXBurning measure, some design and take some low NOXBurning measure, but the low NO in actual motionXCombustion efficiency is most
It is undesirable, General N OXConcentration of emission is still higher, considerably increases the difficulty and day-to-day operation expense of secondary improvement after burning.
The content of the invention
In order to overcome the shortcomings of above-mentioned existing vortex burner, the purpose of this utility model is the provision of one kind and adopted
With the swirling pulverized coal combustion device of full burner hearth multistage combustion mode, pass through single vortex burner air classification and overall stove
Separation after-flame wind energy is set to make the NO of furnace outlet in thoraxXConcentration of emission significantly reduces.
To achieve these goals, the technical solution adopted in the utility model is：It is a kind of using full burner hearth multistage combustion
Swirling pulverized coal combustion device, it is secondary by a wind snout 1, First air passage 2, pulverized coal concentrator 3, central secondary air port 4, one-level
Air port 5, two level overfiren air port 6, three-level overfiren air port 7, axially adjustable blade 8, radial blade 9, burner hearth 10 form, First air spray
Mouth 1 is connected with First air passage 2, and the inside of First air passage 2 is provided with pulverized coal concentrator 3, and central secondary air port 4 is sprayed in First air
The inner side of mouth 1, one-level overfiren air port 5 is on the outside of a wind snout 1, and two level overfiren air port 6 is in the outside of one-level overfiren air port 5, three-level
Overfiren air port 7 has certain distance in burner hearth 10 and with two level overfiren air port 6, and axially adjustable blade 8 is in two level overfiren air port 6
Inside, radial blade 9 is in the inside of one-level overfiren air port 5.
A described wind snout 1 is heat-resistance and wear-resistance steel material manufacture, and one time wind snout 1 is made up of dense side and light side, interior
Portion is dense side, outside is light side.
Described First air passage 2 is the annular passage of wear-resistant steel material manufacture.
Described pulverized coal concentrator 3 manufactures for wear-resistant steel material, and inside distribution First air passage 2, its physical dimension can root
Depending on specifically used occasion.
Described central secondary air port 4 is the cylindrical channel of heat-resisting steel material manufacture.
Described one-level overfiren air port 5 is the annular passage of heat-resisting steel material manufacture.
Described two level overfiren air port 6 is the annular passage of heat-resisting steel material manufacture.
Described three-level overfiren air port 7 is the circular or square spout of heat-resisting steel material manufacture.
Described axially adjustable blade 8 manufactures for heat-resisting steel material, is circumferentially distributed in the inner passage of two level overfiren air port 6
Interior, axially adjustable blade has angle with axis designs, and the big I of angle is adjusted according to specific combustion conditions.
Described radial blade 9 manufactures for heat-resisting steel material, is circumferentially distributed in the inner passage of one-level overfiren air port 5.
Described burner hearth 10 is the combustion chamber of water screen tube composition.
The utility model has advantages below：
Burnt due to realizing coal dust using pulverized coal concentrator in the optimal pulverized coal concentration of First air nozzle, in formation
The radial direction Concentration-decentration Split Combustion that the heart is dense, surrounding is light, local high coal powder density distribution is realized, improve the fire behaviour of coal dust firing
And combustion stability, while reduce formation of nitrogen oxides.
One-level Secondary Air produces rotation Secondary Air by the fixation swirl vane being arranged in air channel and sprayed into stove, due to
The recirculating zone that the recirculating zone coal powder density air-flow high with First air that rotation Secondary Air air-flow is formed is formed coincides, and forms a height
Coal powder density, high temperature, high turbulence region, it ensure that catching fire and active combustion in time for coal dust.
Two level Secondary Air produces rotation Secondary Air by the axially adjustable blade being arranged in air channel and sprayed into stove, with one
Level Secondary Air classification is mixed into, and forms fractional combustion, it is suppressed that NOXFormation, while oxidizing atmosphere is formed around burner,
Prevent burner region coking.Axially adjustable blade can realize the swirl strength regulation of two level Secondary Air, can effectively control flame
Extended corner size.
Three-level Secondary Air is to longitudinally realize fractional combustion in burner hearth, stove chamber inner combustion temperature is controlled, by burner hearth
Combustion zone be divided into two parts, i.e. main burning area and burning-out zone.Main burning area air accounts for the 70%-85% of total blast volume, burning-out zone
Account for the 15%-30% of total blast volume.The generation of the fractional combustion of burner hearth vertical direction, reduction NOX is realized by three-level Secondary Air.
Practice have shown that using the structure of suitable three-level overfire air port, inclination angle, position, air quantity, NOX can be effectively reduced
Growing amount about 30 ~ 50%.
Brief description of the drawings
Accompanying drawing 1 is the utility model structure diagram.
Embodiment
1 pair of structural principle of the present utility model and operation principle are described in further detail below in conjunction with the accompanying drawings.
A kind of vortex burner of full burner hearth multistage combustion, by a wind snout 1, First air passage 2, Pulverized Coal Concentration
Device 3, central secondary air port 4, one-level overfiren air port 5, two level overfiren air port 6, three-level overfiren air port 7, axially adjustable blade 8, footpath
Formed to blade 9, burner hearth 10, one time wind snout 1 is connected with First air passage 2, and the inside of First air passage 2 is provided with Pulverized Coal Concentration
Device 3, central secondary air port 4 is on the inside of a wind snout 1, and one-level overfiren air port 5 is in an outside of wind snout 1, two level Secondary Air
Mouthfuls 6 in the outside of one-level overfiren air port 5, three-level overfiren air port 7 in burner hearth 10, and with two level overfiren air port 6 keep it is certain away from
From, axially adjustable blade 8 in the inside of two level overfiren air port 6, radial blade 9 is in the inside of one-level overfiren air port 5.
One time wind snout 1 is heat-resistance and wear-resistance steel material manufacture, and one time wind snout 1 is made up of dense side and light side；First air leads to
Road 2, pulverized coal concentrator 3 are wear-resistant steel material manufacture, are distributed in pulverized coal concentrator 3 inside First air passage 2 by a general mood
Stream is divided into deep or light two parts, and it is light side that inside is formed at a wind snout 1 as dense side, outside；Central secondary air port 4 is heat-resisting
The cylindrical channel of Steel material manufacture, can set-point kerosene（Gas）Rifle, burning torch and flame monitoring apparatus, can be that dense side coal dust fires
Burn and part oxygen amount is provided；One-level overfiren air port 5, radial blade 9 manufacture for heat-resisting steel material, are filled for the level air-distribution of coal dust firing one
Put, its swirl vane angles is generally 35 ° ~ 65 °；Two level overfiren air port 6, axially adjustable blade 8 manufacture for heat-resisting steel material, are
Coal dust firing two level air distribution device, the angular dimension of axially adjustable blade 8 can be adjusted according to specific combustion conditions；Three-level is secondary
Air port 7 in burner hearth 10, for heat-resisting steel material manufacture circular or square spout, its structure, position, wind than design need to integrate
Consider NOXDischarge index, the burn-off rate of coal dust and furnace flame center.
Operation principle of the present utility model is：
Made first by pulverized coal concentrator First air breeze airflow formed at the burner nozzle on the inside of dense, footpath that outside is light
To Concentration-decentration Split Combustion, realize the combustion mechanism of high coal powder density low oxygen concentration, low coal powder density high oxygen concentration to suppress NOXIt is raw
Into；One-level Secondary Air, two level Secondary Air are sent into step by step not only enhances mixing, burning, and realizes the combustion of air classification low temperature
Burn, reduce NOXGrowing amount；Three-level Secondary Air further enhances low nitrogen burning effect, makes flame along journey NOXPercent reduction significantly
Improve, coke burn-off rate greatly improves, can be achieved efficiency of combustion do not reduce, burner hearth noncoking, under outlet gas temperature windage minor premise
NOXCompared with low emission.
Claims (11)
- A kind of 1. swirling pulverized coal combustion device using full burner hearth multistage combustion, by a wind snout（1）, First air passage（2）、 Pulverized coal concentrator（3）, central secondary air port（4）, one-level overfiren air port（5）, two level overfiren air port（6）, three-level overfiren air port （7）, axially adjustable blade（8）, radial blade（9）, burner hearth（10）Composition, a wind snout（1）It is connected with First air passage (2) Connect, pulverized coal concentrator (3) is provided with inside First air passage (2), central secondary air port (4) are in wind snout (1) inner side, one-level Overfiren air port (5) is on the outside of a wind snout (1), and for two level overfiren air port (6) on the outside of one-level overfiren air port (5), three-level is secondary There is certain distance in air port (7) in burner hearth (10) and with two level overfiren air port (6), and axially adjustable blade (8) is in two level Secondary Air The inside of mouth (6), radial blade (9) is in the inside of one-level overfiren air port (5).
- A kind of 2. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that A described wind snout (1) is heat-resistance and wear-resistance steel material manufacture, and one time wind snout (1) is made up of dense side and light side, and inside is Dense side, outside are light side.
- A kind of 3. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described First air passage (2) is the annular passage of wear-resistant steel material manufacture.
- A kind of 4. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described pulverized coal concentrator (3) manufactures for wear-resistant steel material, is distributed in First air passage (2) inside, its physical dimension can basis Depending on specifically used occasion.
- A kind of 5. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described central secondary air port（4）For the cylindrical channel of heat-resisting steel material manufacture.
- A kind of 6. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described one-level overfiren air port（5）For the annular passage of heat-resisting steel material manufacture.
- A kind of 7. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described two level overfiren air port（6）For the annular passage of heat-resisting steel material manufacture.
- A kind of 8. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described three-level overfiren air port（7）For the circular or square spout of heat-resisting steel material manufacture.
- A kind of 9. swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, it is characterised in that Described axially adjustable blade（8）Manufactured for heat-resisting steel material, be circumferentially distributed in two level overfiren air port（6）Inner passage in, Axially adjustable blade has angle with axis designs, and the big I of angle is adjusted according to specific combustion conditions.
- 10. a kind of swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, its feature exist In described radial blade（9）Manufactured for heat-resisting steel material, be circumferentially distributed in one-level overfiren air port（5）Inner passage in.
- 11. a kind of swirling pulverized coal combustion device using full burner hearth multistage combustion according to claim 1, its feature exist In described burner hearth（10）For the combustion chamber of water screen tube composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621094518.7U CN206739285U (en) | 2016-09-30 | 2016-09-30 | A kind of swirling pulverized coal combustion device using full burner hearth multistage combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621094518.7U CN206739285U (en) | 2016-09-30 | 2016-09-30 | A kind of swirling pulverized coal combustion device using full burner hearth multistage combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206739285U true CN206739285U (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621094518.7U Expired - Fee Related CN206739285U (en) | 2016-09-30 | 2016-09-30 | A kind of swirling pulverized coal combustion device using full burner hearth multistage combustion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973992A (en) * | 2019-05-06 | 2019-07-05 | 西安交通大学 | A kind of industrial coal powder boiler burner of Secondary Air axial blade adjustable angle |
-
2016
- 2016-09-30 CN CN201621094518.7U patent/CN206739285U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973992A (en) * | 2019-05-06 | 2019-07-05 | 西安交通大学 | A kind of industrial coal powder boiler burner of Secondary Air axial blade adjustable angle |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20180930 |