CN108087867A - It is a kind of to be used to balance underload nitrogen oxides and the low nitrogen burning system and method for carbonated drink parameter - Google Patents
It is a kind of to be used to balance underload nitrogen oxides and the low nitrogen burning system and method for carbonated drink parameter Download PDFInfo
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- CN108087867A CN108087867A CN201810027550.0A CN201810027550A CN108087867A CN 108087867 A CN108087867 A CN 108087867A CN 201810027550 A CN201810027550 A CN 201810027550A CN 108087867 A CN108087867 A CN 108087867A
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- burning
- coal
- underload
- nitrogen oxides
- secondary air
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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
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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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Present invention displaying is a kind of to be used to balance underload nitrogen oxides and the low nitrogen burning system and method for carbonated drink parameter, device includes main burner spout, SOFA spouts and high-order wind snout successively from lower to being arranged in coal-burning boiler, and high-order wind snout is correspondingly arranged at the burning-out zone or its upper part of coal-burning boiler；When coal-burning boiler is under low load condition, high-order wind snout connection shunts for the input Secondary Air to main burner spout；Method is on the premise of the original Secondary Air total blast volume of coal-burning boiler is ensured, the Secondary Air that a part is passed through to main burner is sent into coal-burning boiler burning-out zone or the burner hearth more than it, the part Secondary Air is not involved in the burning of coal dust, reduces the excess air coefficient in combustion process, and does not reduce exhaust gas volumn.Invention achieves control nitrogen oxides with ensureing smoke temperature, the purpose of carbonated drink parameter balance, safe and stable operation of the unit on the basis of nitrogen oxides is controlled under low load condition ensure that.
Description
Technical field
The present invention relates to the low nitrogen burning systems of coal-burning boiler, are specially that one kind is used to balance underload nitrogen oxides and vapour
The low nitrogen burning system and method for water parameter.
Background technology
In recent years, China's wind-powered electricity generation and photovoltaic installation scale rapidly increase, in-service and occupied the world building installed capacity
First, but China's electric system regulating power is difficult to adapt to the requirement of new energy extensive development and consumption completely, occurs
More serious abandons wind, abandons the problems such as light.In order to improve new energy digestion capability, it is necessary to which Thermal generation unit discharges it potentially
Flexibility, further depth peak regulation.Therefore, Thermal generation unit underload or even Ultra-low load operation will become normality.
Thermal generation unit boiler, which all employs the low-NO_x combustion technology based on air classification, at this stage reduces burning generation
Nitrogen oxides, core concept be at a certain distance from main burning area downstream increase after-flame wind system, reduce main burning
Air in area, and the required partial air of coal dust firing is sent into burner hearth from after-flame wind system, it can thus make coal dust
The anoxycausis in main burning area achievees the purpose that inhibit NO_x formation.But pulverized-coal fired boiler needs enough exhaust gas volumns
Just its heating surface can be made there are enough heat transfer effects, reach the carbonated drink parameter request of unit needs, because boiler with greetings is in underload
Under it is usually necessary to use the operation of high oxygen amount mode to ensure carbonated drink parameter.But when load is too low, because after-flame wind system can
The air capacity being passed through is limited, this can not just ensure anoxycausis of the coal dust in main burning area, and in order to ensure that boiler carbonated drink is joined
It counts and oxygen amount is substantially improved, burning is caused to generate nitrogen oxides and is largely generated.It can be said that in Thermal generation unit depth peak regulation
Under, the coordination control of boiler nitrogen oxides and boiler circuit parameter in the case where being difficult to accomplish underload and ultra-low load.
The content of the invention
For problems of the prior art, the present invention provides one kind and joins for balancing underload nitrogen oxides with carbonated drink
Several low nitrogen burning system and methods, simple in structure, design is reasonable, and configuration is flexible, stable, can realize running on the lower load
Lower realization boiler nitrogen oxides is coordinated to control with boiler circuit.
The present invention is to be achieved through the following technical solutions：
It is a kind of for balancing the low nitrogen burning system of underload nitrogen oxides and carbonated drink parameter, including secondary air bellow, with
And parallel communication is arranged on main burner spout, SOFA spouts and the high-order wind snout on secondary air bellow；
Main burner spout, SOFA spouts and the high-order wind snout is arranged in coal-burning boiler from top to bottom successively,
High-order wind snout is correspondingly arranged at the burning-out zone or its upper part of coal-burning boiler；
When coal-burning boiler is under low load condition, high-order wind snout connection is for the input two to main burner spout
Secondary wind is shunted.
Preferably, the main burning that output terminal connects main burner spout, SOFA spouts and high-order wind snout respectively is further included
Device bellows, SOFA bellows and high-order wind bellows；The input terminal of main burner bellows, SOFA bellows and high-order wind bellows with it is secondary
Wind bellows connect.
Preferably, it is separately provided for the individually operated connection machine bobbed and woven on each high-order wind snout
Structure and volume adjusting apparatus.
Preferably, high-order wind snout is arranged on the same layer inside coal-burning boiler.
Preferably, high-order wind snout is located on burner hearth corner or front-back wall.
Preferably, control Secondary Air input is separately provided on the connecting line of secondary air bellow and high-order wind snout
Secondary air-valve and high-order air-valve for controlling high-order wind snout break-make.
It is a kind of to be used to balance underload nitrogen oxides and the method for carbonated drink parameter, in coal-burning boiler underrun,
On the premise of ensureing the original Secondary Air total blast volume of coal-burning boiler, the Secondary Air that a part is passed through to main burner is sent into coal-burning boiler
Burning-out zone or the burner hearth more than it, the part Secondary Air are not involved in the burning of coal dust, reduce the excess air system in combustion process
Number, and do not reduce exhaust gas volumn.
Preferably, Secondary Air more than coal-burning boiler burning-out zone is sent by being correspondingly arranged at burning-out zone or the high position more than it
Wind snout introduces.
Further, when coal-burning boiler underrun, high-order wind snout is opened, when the non-underrun of coal-burning boiler
When, high-order wind snout is closed.
Further, the high-order wind bellows that the wind of high-order wind snout is arranged in parallel by main burner air intake vent provide.
Compared with prior art, the present invention has technique effect beneficial below：
The present invention reduces the excess air factor in main burning area so as to ensure underload by the high-order wind snout of setting
Lower nitrogen oxides ensure that the coordination control of flue-gas temperature and boiler circuit under underload in reasonable level, so as to reach
To control nitrogen oxides with ensure smoke temperature, the purpose of carbonated drink parameter balance, in low- load conditions realize boiler nitrogen oxides with
Boiler circuit coordinates control, ensure that safe and stable operation of the unit on the basis of nitrogen oxides is controlled under low load condition.
Further, can be engaged with depth peak regulation, unit flexibility retrofit work, by high-order wind bellows and right
The coupling mechanism and volume adjusting apparatus answered, increase high-order wind air quantity ensure boiler in the case that ultra-low load nitrogen oxides with
Carbonated drink parameter coordination control, so as to achieve the purpose that unit become more meticulous burning optimization adjustment.
Method of the present invention by more refine Secondary Air on the basis of low nitrogen burning shunt so that
A part of Secondary Air be not involved in burning but participate in heat exchange, so as to and ensure that under underload nitrogen oxides low amounts discharge, and protect
The coefficient of heat transfer of Boiler Convection Heating Surface has been demonstrate,proved, boiler at low load nitrogen oxides and carbonated drink parameter effectively adjust and control
System.
Description of the drawings
Fig. 1 is the structure diagram of the low nitrogen burning system described in present example.
Fig. 2 is that the high-order wind described in present example arranges schematic diagram.
In figure：High-order wind snout 1, SOFA spouts 2, main burner spout 3, high-order wind bellows 4, SOFA bellows 5, main burning
Device bellows 6, secondary air bellow 7.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
The present invention is a kind of for balancing the low nitrogen burning system of underload nitrogen oxides and carbonated drink parameter, by by primary zone
Partial air be transferred to after-flame area top and be sent into burner hearth, this partial air is no longer participate in burning, therefore is equivalent to reduction combustion
Excess air coefficient during burning achievees the effect that control NOx under underload, but does not reduce exhaust gas volumn, controls burner hearth cigarette
Temperature ensures the normal operation of boiler steam and water circuit.
As depicted in figs. 1 and 2, the present invention includes high-order wind snout 1 and high-order wind bellows 4, and high-order wind snout 1 is mounted on
3 top of SOFA wind snouts 2 and main burner spout, corresponding burning-out zone and/or its upper part are set, by high-order wind bellows 4 with
SOFA wind bellows 5 and the Secondary Air in parallel drawn for the high-order access of wind snout 1 of main burner bellows 6 are as high-order wind.
The coupling mechanism that individually operated can be bobbed and woven and air quantity tune are installed for each high-order wind snout 1
Regulating device can carry out high-order wind snout according to boiler operatiopn operating mode real-time adjusting up and down, it is ensured that high-order wind system
Accurate regulatory function.
Unit needs to carry out the situation of Ultra-low load operation during fired power generating unit flexibility transformation and depth peak regulation
Under, the climate control issues of flue gas and boiler circuit are especially prominent.After high-order wind is introduced in low nitrogen burning system, it can pass through
Adjust high-order wind and carry out further NO_x formation and coordinate to control with boiler smoke temperature, so as to reach carbonated drink parameter balance with it is low
The purpose of load denitration ensures the stabilization safe operation of unit.
Specifically, on the basis of the original low nitrogen burning system of boiler, increase outside 2 top certain distance of distance SOFA spouts
An if floor height position wind snout 1.High-order wind snout 1 is identical with SOFA spouts 2, arrangement or front-back wall arrangement in burner hearth corner.It is high-order
Wind snout 1 be located at burner hearth burning-out zone or its it is above after, in this position, after-flame, high-order wind snout 1 spray into the sky of burner hearth to coal dust
Gas is no longer participate in the burning of coal dust.High-order wind snout 1 passes through high-order wind bellows 4 and SOFA bellows 5 and 6 phase of main burner bellows
It is intercommunicated, realize the distribution for the Secondary Air that secondary air bellow 7 exports.
Method of the present invention when boiler at low load is run, is opened in the high-order wind positioned at 2 top of SOFA wind snouts
Spout 1, and pass through high-order wind bellows 4 volume adjusting apparatus is installed and air quantity is adjusted, ensure that the original Secondary Air of boiler is total
On the premise of air quantity, a part of Secondary Air is sent into burner hearth by high-order wind snout.Due to empty into this part of high-order wind snout 1
Gas is sent into burner hearth more than burning-out zone or its, is no longer participate in the burning of coal dust, therefore is equivalent to the excess reduced in combustion process
Air coefficient achievees the effect that control NOx at low load, but does not reduce exhaust gas volumn, ensures changing for Boiler Convection Heating Surface
Hot coefficient is so as to boiler carbonated drink parameter progress effectively adjusting and control.
Claims (10)
1. a kind of be used to balance underload nitrogen oxides and the low nitrogen burning system of carbonated drink parameter, which is characterized in that including secondary
Wind bellows (7) and parallel communication are arranged on main burner spout (3), SOFA spouts (2) and height on secondary air bellow (7)
Position wind snout (1)；
Main burner spout (3), SOFA spouts (2) and the high-order wind snout (1) is arranged on coal-fired pot from top to bottom successively
In stove, high-order wind snout (1) is correspondingly arranged at the burning-out zone or its upper part of coal-burning boiler；
When coal-burning boiler is under low load condition, high-order wind snout (1) connection is for the input to main burner spout (3)
Secondary Air is shunted.
2. it is according to claim 1 a kind of for balancing underload nitrogen oxides and the low nitrogen burning system of carbonated drink parameter,
It is characterized in that, further include the master that output terminal connects main burner spout (3), SOFA spouts (2) and high-order wind snout (1) respectively
Burner wind-box (6), SOFA bellows (5) and high-order wind bellows (4)；Main burner bellows (6), SOFA bellows (5) and high-order wind
The input terminal of bellows (4) is connected with secondary air bellow (7).
3. it is according to claim 1 a kind of for balancing underload nitrogen oxides and the low nitrogen burning system of carbonated drink parameter,
It is characterized in that, it is separately provided for the individually operated connection machine bobbed and woven on each high position wind snout (1)
Structure and volume adjusting apparatus.
4. it is according to claim 1 a kind of for balancing underload nitrogen oxides and the low nitrogen burning system of carbonated drink parameter,
It is characterized in that, high-order wind snout (1) is arranged on the same layer inside coal-burning boiler.
5. it is according to claim 1 a kind of for balancing underload nitrogen oxides and the low nitrogen burning system of carbonated drink parameter,
It is characterized in that, high-order wind snout (1) is located on burner hearth corner or front-back wall.
6. it is according to claim 1 a kind of for balancing underload nitrogen oxides and the low nitrogen burning system of carbonated drink parameter,
It is characterized in that, it is defeated to be separately provided for control Secondary Air on secondary air bellow (7) and the connecting line of high-order wind snout (1)
The secondary air-valve entered and the high-order air-valve for controlling high-order wind snout (1) break-make.
7. a kind of be used to balance underload nitrogen oxides and the method for carbonated drink parameter, which is characterized in that in coal-burning boiler underload
During operation, on the premise of the original Secondary Air total blast volume of coal-burning boiler is ensured, the Secondary Air that a part is passed through to main burner is sent
Enter coal-burning boiler burning-out zone or the burner hearth more than it, which is not involved in the burning of coal dust, reduces in combustion process
Excess air coefficient, and do not reduce exhaust gas volumn.
8. according to claim 7 a kind of for balancing underload nitrogen oxides and the method for carbonated drink parameter, feature exists
In the Secondary Air being sent into more than coal-burning boiler burning-out zone is drawn by being correspondingly arranged at burning-out zone or the high-order wind snout (1) more than it
Enter.
9. according to claim 8 a kind of for balancing underload nitrogen oxides and the method for carbonated drink parameter, feature exists
In, when coal-burning boiler underrun, high-order wind snout (1) is opened, when the non-underrun of coal-burning boiler, high-order wind spray
Mouth (1) is closed.
10. according to claim 8 a kind of for balancing underload nitrogen oxides and the method for carbonated drink parameter, feature exists
In the high-order wind bellows (4) that the wind of high-order wind snout (1) is arranged in parallel by main burner air intake vent provide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810027550.0A CN108087867A (en) | 2018-01-11 | 2018-01-11 | It is a kind of to be used to balance underload nitrogen oxides and the low nitrogen burning system and method for carbonated drink parameter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810027550.0A CN108087867A (en) | 2018-01-11 | 2018-01-11 | It is a kind of to be used to balance underload nitrogen oxides and the low nitrogen burning system and method for carbonated drink parameter |
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| CN108087867A true CN108087867A (en) | 2018-05-29 |
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| CN201810027550.0A Pending CN108087867A (en) | 2018-01-11 | 2018-01-11 | It is a kind of to be used to balance underload nitrogen oxides and the low nitrogen burning system and method for carbonated drink parameter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460576A (en) * | 2020-11-23 | 2021-03-09 | 西安热工研究院有限公司 | Boiler smoke and air system suitable for deep peak regulation and peak regulation method |
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| CN112460576A (en) * | 2020-11-23 | 2021-03-09 | 西安热工研究院有限公司 | Boiler smoke and air system suitable for deep peak regulation and peak regulation method |
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