CN106122944A - A kind of pulverized-coal fired boiler - Google Patents
A kind of pulverized-coal fired boiler Download PDFInfo
- Publication number
- CN106122944A CN106122944A CN201610587980.9A CN201610587980A CN106122944A CN 106122944 A CN106122944 A CN 106122944A CN 201610587980 A CN201610587980 A CN 201610587980A CN 106122944 A CN106122944 A CN 106122944A
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- China
- Prior art keywords
- burner
- coal
- pulverized
- biomass gasification
- fired boiler
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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
- 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
-
- 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
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
- F23C2201/301—Staged fuel supply with different fuels in stages
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to field of boilers, the present invention provides a kind of pulverized-coal fired boiler, it is provided with coal burner in its burner hearth, being additionally provided with multiple biomass gasification burning burner around section of burner hearth center in described burner hearth, described biomass gasification burning burner is positioned at above described coal burner coal dust primary zone.In the pulverized-coal fired boiler of the present invention, being provided with multiple around section of burner hearth center biomass gasification burning burner in burner hearth, biomass gasification burning burner is positioned at above coal burner coal dust primary zone.The flue gas that coal dust firing is formed, can mix uniformly with biological fuel gas, and the NOx in flue gas can be reduced by biomass gasification burning, and in pulverized-coal fired boiler flue gas, the discharge capacity of NOx is low.The carbon containing thing of the flying dust in flue gas, CO can burn with biomass fuel gas firing simultaneously, and the flue gas carbon containing thing, the CO that are finally discharged are low.Due to the carbon containing thing in flue gas, CO burning, the thermal efficiency of boiler is improved.
Description
Technical field
The present invention relates to field of boilers, particularly a kind of pulverized-coal fired boiler.
Background technology
The pollutant of fuel combustion discharge are the major parts of atmosphere pollution, and the NOx produced that wherein burns is to cause acid
One of main component of rain, its environmental problem caused allows of no optimist, and coal-fired process be NOx main source it
One.China is coal big country, and coal occupies the biggest ratio in primary energy is consumed, and at nearest this energy decades
Source structure may will not change.
Existing biomass and coal-powder boiler cogeneration technology mainly have 2 big classes: biomass and fire coal are multiple after processing respectively
Combination burning；Unified burning after biomass and coal-fired mixing.The technology burnt respectively after biomass and coal-fired process respectively, most common
Be biomass and fire coal uses respective broken pulverized coal preparation system respectively, use respective burner tissue to burn respectively.Biological
Matter and fire coal can share a burner, it is also possible to use respective burner respectively.This technology needs to install biomass
The conveyance conduit of fuel, controls and safeguards that boiler is cumbersome.Compound combustion technique individually can also set for biomass fuel
Count special burner.Biomass are rich in alkali metal, and the content of Cl is the highest, make due to alkali-metal existence after mixed combustion
Becoming ash fusion point to reduce, agglutinating property dust stratification increases, and causes ash deposition propensity and the alkali of the heating surfaces such as boiler water wall superheater reheater
Metallic high temperature corrosion tendency strengthens, and the etching problem of HCl is the most serious simultaneously.And biomass and coal dust firing control the most tired
Difficulty, easily causes combustion instability during biomass fuel quality fluctuation, flame kernel fluctuates, and causes unburned carbon in flue dust and slag to contain
Carbon amounts increases, and combustible loss increases.Although compound combustion mode can lower the discharge capacity of NOX to a certain extent, but,
Biomass fuel is sent to reburning zone as secondary fuel, and biomass fuel belongs to solid fuel, and the effect of its reduction NOX is limited,
The concentration of emission of NOX reduces relatively limited.
Unified combustion technology after biomass and coal-fired mixing, is biomass and fire coal first to be mixed, is then passed through coal-grinding
Machine is pulverized, then is transported to existing burner, tissue burning by the pipeline of pulverized coal preparation system.This mode can make full use of original
Pulverized coal preparation system and combustion apparatus, simple, invest low.But it is likely to decrease boiler output, limit biomass kind
With the ratio of use.And coal dust is the fuel that two kinds of physical propertys are different after all from biomass, its ignition temperature, burning time,
Flow traces in air etc. are all different, and combustion instability, flame kernel change, burning easily occurs in mixed unified burning
Degradation problem under efficiency.And biomass are rich in alkali metal, after mixed combustion, ash fusion point is caused to reduce due to alkali-metal existence,
Agglutinating property dust stratification increases, and causes the ash deposition propensity of the heating surfaces such as boiler water wall superheater reheater and alkali-metal high temperature corrosion
Tendency strengthens, and the etching problem of HCl is the most serious simultaneously.The concentration of emission of NOX in flue gas is discharged higher under this combustion system.
Summary of the invention
Present invention aim at providing a kind of pulverized-coal fired boiler, DS NOx Est amount is low.
For reaching above-mentioned advantage, the present invention provides a kind of pulverized-coal fired boiler, is provided with coal burner, in described burner hearth in its burner hearth
Being additionally provided with multiple biomass gasification burning burner around section of burner hearth center, described biomass gasification burning burner is positioned at
Above described coal burner coal dust primary zone.
In one embodiment of the pulverized-coal fired boiler of the present invention, described pulverized-coal fired boiler is corner tangential firing pulverized-coal fired boiler, institute
State biomass gasification burning burner identical with the circle of contact that described coal burner is formed.
In an embodiment of the pulverized-coal fired boiler of the present invention, described biomass gasification burning burner is positioned at described burner hearth
Corner.
In an embodiment of the pulverized-coal fired boiler of the present invention, described biomass gasification burning burner is positioned at described burner hearth
Water-cooling wall side in the middle part of.
In an embodiment of the pulverized-coal fired boiler of the present invention, described pulverized-coal fired boiler be burner be to the coal dust blowing layout
Boiler, described biomass gasification burning burner arrangement is having on described coal burner two water-cooling wall.
In an embodiment of the pulverized-coal fired boiler of the present invention, described biomass gasification burning burner is for by biomass
Gasification burning sprays in described burner hearth after mixing with air or oxygen.
In an embodiment of the pulverized-coal fired boiler of the present invention, described biomass gasification burning burner is for by biomass
Gasification burning individually sprays in described burner hearth.
In an embodiment of the pulverized-coal fired boiler of the present invention, described biomass gasification burning burner is arranged over after-flame
Wind OFA nozzle.
In an embodiment of the pulverized-coal fired boiler of the present invention, the quantity of described biomass gasification burning burner is 4.
In an embodiment of the pulverized-coal fired boiler of the present invention, the quantity of described biomass gasification burning burner is even number
Individual, each described biomass gasification burning burner has the described biomass about section of burner hearth central point
Gasification burning burner.
In an embodiment of the pulverized-coal fired boiler of the present invention, described biomass gasification burning burner is positioned at described coal dust
Above burner coal dust primary zone in the range of 6000mm.
In the pulverized-coal fired boiler of the present invention, it is provided with multiple around the burning of section of burner hearth center biomass gasification burning in burner hearth
Device, biomass gasification burning burner is positioned at above coal burner coal dust primary zone.The flue gas that coal dust firing is formed, can be with life
Substance combustible gas mixes uniformly, and the NOx in flue gas can be reduced by biomass gasification burning, the discharge of NOx in pulverized-coal fired boiler flue gas
Measure low.The carbon containing thing of the flying dust in flue gas, CO can burn with biomass fuel gas firing simultaneously, the flue gas carbon containing finally discharged
Thing, CO are low.Due to the carbon containing thing in flue gas, CO burning, the thermal efficiency of boiler is improved.
Accompanying drawing explanation
Fig. 1 show the structural representation of the pulverized-coal fired boiler of first embodiment of the invention.
Fig. 2 show the schematic cross-section of the pulverized-coal fired boiler of Fig. 1.
Fig. 3 show the structural representation of the pulverized-coal fired boiler of second embodiment of the invention.
Fig. 4 show the schematic cross-section of the pulverized-coal fired boiler of Fig. 1.
Fig. 5 show the structural representation of the pulverized-coal fired boiler of third embodiment of the invention.
Fig. 6 show the schematic cross-section of the pulverized-coal fired boiler of Fig. 1.
Fig. 7 show the structural representation of the pulverized-coal fired boiler of fourth embodiment of the invention.
Fig. 8 show the structural representation of the pulverized-coal fired boiler of fifth embodiment of the invention.
Fig. 9 show the experimental data of the pulverized-coal fired boiler of the present invention first and third embodiment.
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, below in conjunction with
Accompanying drawing and preferred embodiment, propose detailed description of the invention, structure, feature and effect thereof to according to the present invention, after describing in detail such as.
Fig. 1 show the structure chart of the pulverized-coal fired boiler of first embodiment of the invention.Fig. 2 show the pulverized-coal fired boiler of Fig. 1
Schematic cross-section.The pulverized-coal fired boiler referring to Fig. 1, Fig. 2 the present embodiment is corner tangential firing pulverized-coal fired boiler, including: biomass
Gasification burning main pipeline 1, coal burner 2, biomass gasification burning branch pipe(tube) 3, biomass gasification burning burner 4, coal dust
Boiler furnace 5, furnace hopper 6.Biomass gasification burning main pipeline 1 is by biomass gasification burning branch pipe(tube) 3 and gasification of biomass
Gas burner 4 connects, and biomass gasification burning burner 4 is fixed on the top of coal burner 2 in Pulverized Coal fired Boiler Furnace 5,
Furnace hopper 6 is positioned at below Pulverized Coal fired Boiler Furnace 5.Biomass gasification burning burner 4 is arranged around section of burner hearth center O, and often
One gasification of biomass gas burner 4 has a biomass gasification burning burner 4 about section of burner hearth center O point symmetry.
Coal burner 2 is the coal burner of corner tangential firing pulverized-coal fired boiler.Biomass gasification burning is by biology
Matter gasification burning main pipeline 1 enters biomass gasification burning branch pipe(tube) 3, subsequently into biomass gasification burning burner 4, at this
Entering coal powder boiler combustion with air after mixing, biomass gasification burning burner 4 is arranged in the top of coal burner 2, i.e.
In the range of the top 6000mm in primary zone, i.e. biomass gasification burning burner 4 is arranged in away from the coal burner the superiors one
Above secondary wind pulverized coal channel in the range of 6000mm.Biomass gasification burning burner 4 and coal burner 2 enter pulverized-coal fired boiler
Direction is consistent, i.e. the two circle of contact formed is identical.In other embodiments of the invention, biomass gasification burning also can be independent
Coal powder boiler combustion is entered by biomass gasification burning burner.
It is arranged on this position and can improve the burn-off rate of boiler, reduce the phosphorus content of flying dust in flue gas, reduce CO content simultaneously, carry
The thermal efficiency of high boiler；It is low-calorie biomass gasified gas due to be passed through, it is possible to achieve hypothermia and hypoxia burns, and makes this region
It is rendered as reducing atmosphere, NOx concentration can be made to reduce by more than 20%.
It show the schematic cross-section of the pulverized-coal fired boiler of Fig. 1.The pulverized-coal fired boiler structure of the present embodiment and first embodiment and
Principle is similar, and the difference of the two is:
Biomass gasification burning burner 4 is arranged in the water-cooling wall side medium position of Pulverized Coal fired Boiler Furnace 5, it is not necessary in center
Between, the two circle of contact formed is identical.
It is arranged on this position and pot inner flue gas of the stove can be formed certain disturbance, make flue gas mix with flue gas with biological fuel gas
Fully, biological fuel gas can more efficiency reduction flue gas in NOx.
Fig. 5 show the structural representation of the pulverized-coal fired boiler of third embodiment of the invention.Fig. 6 show the coal dust pot of Fig. 1
The schematic cross-section of stove.In the present embodiment, pulverized-coal fired boiler be burner be to the pulverized-coal fired boiler blowing layout:
Even number biomass gasification burning burner 4 is arranged in the biomass on the water-cooling wall of coal burner 2, on water-cooling wall
Gasification burning burner 4 is symmetrical along section of burner hearth center line A.
Fig. 7 show the structural representation of the pulverized-coal fired boiler of fourth embodiment of the invention.The pulverized-coal fired boiler of the present embodiment is
It is provided with the boiler of burnout degree OFA nozzle 7.
Biomass gasification burning burner 4 is arranged in the position between coal burner 2 and burnout degree OFA nozzle 7, according to
Different pulverized-coal fired boiler kinds, biomass gasification burning burner 4 uses the present invention first, second and third to implement in the horizontal direction
A kind of arrangement in example.
Fig. 8 show the structural representation of the pulverized-coal fired boiler of fifth embodiment of the invention.The boiler of the present embodiment and first,
Two, the difference of the boiler of three embodiments is:
Biomass gasification burning burner 4 is arranged in the lower section in primary zone, i.e. coal burner 2 orlop First air and furnace hopper
Between 6. the advantage being arranged on this position is: be low-calorie biomass gasified gas owing to mixing the combustion gas of burning, at former coal dust firing
Fired biomass gasification gas is mixed in the lower section of device, reduces the temperature in coal burner region, makes the NOx concentration in flue gas reduce.
Applicant is tested with the arrangement of first and third embodiment, and experimental data refers to Fig. 9.
In other embodiments of the invention, the quantity of biomass gasification burning burner is odd number.
In other embodiments of the invention, neither one biomass gasification burning burner and another gasification of biomass
Gas burner is symmetrical about thorax kernel of section O, and when being odd number such as biomass gasification burning burner, biomass gasification burning fires
Burner is arranged around thorax kernel of section O uniformly.
So biomass gasification burning sprays into and flue gas can define certain disturbance, and destroys the burning of coal dust in burner hearth
Environment, large effect boiler thermal output, burner hearth likely coking, must reduce mixing of biomass gasification burning in this case
Burning amount.
In the pulverized-coal fired boiler of the present invention, it is provided with multiple around the burning of section of burner hearth center biomass gasification burning in burner hearth
Device, biomass gasification burning burner is positioned at above coal burner coal dust primary zone.The flue gas that coal dust firing is formed, can be with life
Substance combustible gas mixes uniformly, and the NOx in flue gas can be reduced by biomass gasification burning, NOx in the flue gas of pulverized-coal fired boiler discharge
Discharge capacity low.The carbon containing thing of the flying dust in flue gas, CO can burn with biomass fuel gas firing simultaneously, the cigarette finally discharged
Gas carbon containing thing, CO are low.Due to the carbon containing thing in flue gas, CO burning, the thermal efficiency of boiler is improved.
Fig. 9 show the experimental data of the pulverized-coal fired boiler of the present invention first and third embodiment.Refer to Fig. 9, the present invention's
In pulverized-coal fired boiler, the flue gas disturbance produced coal dust firing due to biomass gasification burning is little, biomass gasification burning burner
Spraying into after being mixed with air or oxygen by biomass gasification burning in burner hearth, the mixed-fuel burning proportion of biomass gasification burning is big, finally
The NOx of discharge, CO, carbon containing thing are few, and the thermal efficiency of boiler is high in addition.
Above, it is only presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction, although the present invention
Disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, do not taking off
In the range of technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to equivalent variations
Equivalent embodiments, as long as being without departing from technical solution of the present invention content, according to the technical spirit of the present invention to above example
Any simple modification, equivalent variations and the modification made, all still falls within the range of technical solution of the present invention.
Claims (10)
1. a pulverized-coal fired boiler, is provided with coal burner (2) in its burner hearth (5), it is characterised in that: described burner hearth also sets in (5)
There is multiple biomass gasification burning burner (4) around section of burner hearth center (O).
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: described biomass gasification burning burner (4) is positioned at
Above or below described coal burner (2) coal dust primary zone.
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: described pulverized-coal fired boiler is corner tangential firing coal dust pot
Stove, described biomass gasification burning burner (4) is identical with the circle of contact that described coal burner (2) is formed.
Pulverized-coal fired boiler the most according to claim 3, it is characterised in that: described biomass gasification burning burner (4) is positioned at
In the middle part of the corner of described burner hearth or the water-cooling wall side of described burner hearth.
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: described pulverized-coal fired boiler be burner be to blowing layout
Pulverized-coal fired boiler, described biomass gasification burning burner (4) has been arranged on described coal burner (2) two water-cooling wall.
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: described biomass gasification burning burner (4) is used for
Spray into after biomass gasification burning is mixed with air or oxygen in described burner hearth (5).
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: described biomass gasification burning burner (4) top
It is provided with burnout degree OFA nozzle (7).
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: the number of described biomass gasification burning burner (4)
Amount is 4 or more than 4.
Pulverized-coal fired boiler the most according to claim 1, it is characterised in that: the number of described biomass gasification burning burner (4)
Amount for even number, each described biomass gasification burning burner (4) have one put about section of burner hearth center (O) right
The described biomass gasification burning burner (4) claimed.
10. according to the arbitrary described pulverized-coal fired boiler of claim 1-9, it is characterised in that: described biomass gasification burning burner
(4) it is positioned at above described coal burner (2) coal dust primary zone in the range of 6000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610587980.9A CN106122944A (en) | 2016-07-25 | 2016-07-25 | A kind of pulverized-coal fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610587980.9A CN106122944A (en) | 2016-07-25 | 2016-07-25 | A kind of pulverized-coal fired boiler |
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| CN106122944A true CN106122944A (en) | 2016-11-16 |
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| CN201610587980.9A Pending CN106122944A (en) | 2016-07-25 | 2016-07-25 | A kind of pulverized-coal fired boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606601A (en) * | 2017-08-23 | 2018-01-19 | 清华大学 | Burning method for organizing in a kind of opposed firing pulverized-coal fired boiler stove |
| CN107620954A (en) * | 2017-08-23 | 2018-01-23 | 清华大学 | Pollutant emission control method in circle of contact pulverized coal firing boiler stove |
| CN108534175A (en) * | 2018-06-11 | 2018-09-14 | 大唐环境产业集团股份有限公司 | A kind of coal-burning boiler plasma gasification ignition smooth combustion apparatus and method |
| CN109028037A (en) * | 2018-06-06 | 2018-12-18 | 大唐长山热电厂 | The method that the device and biogasification gas and coal dust being mixed and burned for biogasification gas and coal dust are mixed and burned |
| CN114923168A (en) * | 2022-05-17 | 2022-08-19 | 哈尔滨工业大学 | Self-stabilized low-nitrogen-oxide four-corner tangential boiler and combustion method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606601A (en) * | 2017-08-23 | 2018-01-19 | 清华大学 | Burning method for organizing in a kind of opposed firing pulverized-coal fired boiler stove |
| CN107620954A (en) * | 2017-08-23 | 2018-01-23 | 清华大学 | Pollutant emission control method in circle of contact pulverized coal firing boiler stove |
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| CN109028037A (en) * | 2018-06-06 | 2018-12-18 | 大唐长山热电厂 | The method that the device and biogasification gas and coal dust being mixed and burned for biogasification gas and coal dust are mixed and burned |
| CN108534175A (en) * | 2018-06-11 | 2018-09-14 | 大唐环境产业集团股份有限公司 | A kind of coal-burning boiler plasma gasification ignition smooth combustion apparatus and method |
| CN108534175B (en) * | 2018-06-11 | 2023-10-10 | 大唐环境产业集团股份有限公司 | Plasma gasification ignition stable combustion device and method for coal-fired boiler |
| CN114923168A (en) * | 2022-05-17 | 2022-08-19 | 哈尔滨工业大学 | Self-stabilized low-nitrogen-oxide four-corner tangential boiler and combustion method |
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Application publication date: 20161116 |