CN105910097A - System and method for achieving fuel reburning denitration through whirlwind cylinder grading of power station boiler - Google Patents

System and method for achieving fuel reburning denitration through whirlwind cylinder grading of power station boiler Download PDF

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Publication number
CN105910097A
CN105910097A CN201610397032.9A CN201610397032A CN105910097A CN 105910097 A CN105910097 A CN 105910097A CN 201610397032 A CN201610397032 A CN 201610397032A CN 105910097 A CN105910097 A CN 105910097A
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China
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fuel
cyclone cylinder
reburning
main
burning
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CN201610397032.9A
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Chinese (zh)
Inventor
车得福
卜宇凡
吴松
唐春丽
邓磊
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西安交通大学
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Priority to CN201610397032.9A priority Critical patent/CN105910097A/en
Publication of CN105910097A publication Critical patent/CN105910097A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/06Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00Staged combustion
    • F23C2201/10Furnace staging
    • F23C2201/101Furnace staging in vertical direction, e.g. alternating lean and rich zones
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00Staged combustion
    • F23C2201/30Staged fuel supply

Abstract

The invention discloses a system and method for achieving fuel reburning denitration through whirlwind cylinder grading of a power station boiler. According to the system, a whirlwind burning manner and a fuel reburning technology are taken as the basis, and the system comprises a main burning whirlwind cylinder, a main hearth, a reburning whirlwind cylinder or whirlwind gasifier, a burn-out air nozzle and a liquid-state slag discharging device. According to the method, the whirlwind burning manner is adopted, and ignition and stable burning of fuel are ensured; on the basis of the conventional fuel reburning technology, part of fuel is fed into the reburning whirlwind cylinder or whirlwind gasifier to have a half-gasification or complete gasification reaction, generated high-temperature gaseous products serve as reburning fuel, and the needed reaction temperature and the needed number of effective reducing groups in the reducing area are ensured; and meanwhile, due to the fact that the deeper fuel grading is allowed, reducing atmosphere in the reducing area is further enhanced, the denitration efficiency of the system is improved, and the gaseous reburning fuel is more easily burnt in the burning-out area.

Description

Station boiler uses cyclone cylinder classification to realize the system and method for fuel denitration by refueling

Technical field:

The present invention relates to a kind of station boiler uses cyclone cylinder classification to realize system and the side of fuel denitration by refueling Method.

Background technology:

It is known that nitrogen oxides (NOx) it is one of major pollutants of generation in coal combustion process, in recent years Come, NOxHarm more and more paid attention to by world community.In order to reduce the gross contamination emission of coal electricity, National environmental protection portion puts into effect and promulgates the thermal power plant Air Pollutant Emission of " the tightest in history, world wide in the tightest " Standard (GB13223-2011), and started to perform in 1 day January in 2012.New standard is to coal-burning boiler NOxDischarge proposes very strict requirements, must not exceed 100mg m-3, simultaneously to key area with gas Gas turbine group for fuel proposes NOxDischarge must not exceed 50mg m-3Special emission limit requirement. The harshest emission limit makes domestic Thermal Power Generation Industry face unprecedented pressure and challenge.Expense of comparing is held high Expensive SCR technology (SCR), by the improvement of combustion technology, drops in fuel combustion process Low NOxGrowing amount be reduce NOxDischarge ideal and economic approach.

It is at present, domestic that some remove NO by tissue burningxCorrelation technique, deep or light including fuel Separation, low NOxBurner, air classification technology, fuel reburning technology, flue gas recirculation etc..Wherein, Fuel reburning technology is a kind of generally acknowledged very effective method, and its denitration efficiency is general all 50%~70%. Fuel reburning technology is developed so far, and its principal mode is the most substantially stationary, i.e. along height side in boiler main burner hearth To being divided into three regions, the firstth district is primary zone, the most only sends into the most fuel of boiler, accounts for total The 80%~85% of amount, burns under oxidisability or weak reducing atmosphere and generates NO simultaneouslyx;Secondth district is again Combustion district, sends into remaining 15%~20% fuel, forms reducing atmosphere, at the bar of excess air coefficient α < 1 The NO under part, primary zone generatedxIt is reduced into N2.The core of fuel reburning technology is exactly, in reburning zone The NO that not only will generatexReduce, but also the most effectively inhibit new NOxGenerate, make NOx Concentration of emission reduce further;3rd district is burning-out zone, is passed through burnout degree herein, excess air coefficient α > 1, To complete the after-flame of residual fuel.

But the most at home, development and the application of fuel reburning technology were the most once obstructed, and trace it to its cause master If there is the restriction of the following aspects in practical implementation:

(1) restriction of reburning fuel share

In order to strengthen fuel reburning technology to NOxEmission reduction effect, it is necessary to formed in reducing zone higher also Originality atmosphere, i.e. needs to expand the share shared by reburning fuel further, but comes for traditional coal-powder boiler Saying, reburning fuel share can bring the biggest after-flame problem to burning-out zone after expanding, and has had a strong impact on fuel Efficiency of combustion.

(2) restriction of reburning zone length

The length of reducing zone reflects the fuel time of staying in reducing zone, is restriction NOxReduction effect Another key factor, but in engineering reality, the way of this requirement is met by increasing furnace height The cost that can make whole system is greatly increased.

(3) restriction of primary zone α

For conventional fuel reburning technology, in primary zone, the fuel of 80%~85% is the excess in 0.9~1.1 Complete burning under air coefficient, more pollutant NO will necessarily be generated in the processxIf, but Attempt to strengthen by reducing excess air coefficient α the reproducibility in primary zone, reduce primary zone NO with thisx's Generate, then main fuel herein catch fire and burn will necessarily be significantly affected.

(4) restriction of reburning fuel kind

According to domestic existing research, in order to ensure NOxBurning is improved further on the basis of emission reduction effect Efficiency, scholars propose to use microfine coal or natural gas (CH for conventional fuel reburning technology4) etc. make For the improved method of reburning fuel, so the biggest lifting is truly had for overall combustion economization.But it is super The operating cost of the power consumption that the preparation of fine breeze is brought and complicated pulverized coal preparation system all can be greatly improved cost, with Time the gaseous fuel such as natural gas a large amount of acquisition also limited by the biggest region.

Summary of the invention:

For current existing fuel reburning technology in terms of denitration existing for weak point, the present invention provide A kind of station boiler uses cyclone cylinder classification to realize the system and method for fuel denitration by refueling.Its purpose exists In, the shortcoming overcoming conventional fuel reburning technology, on the basis of taking into account fuel relatively high burning efficiency, enter one Step reduces the NO of pulverized coal firing boilerxDischarge.

For reaching above-mentioned purpose, the present invention adopts the following technical scheme that and realizes:

Station boiler uses cyclone cylinder classification to realize the system of fuel denitration by refueling, including main combustion cyclone cylinder, Main furnace chamber and fire cyclone cylinder or cyclone gasification furnace again;Wherein,

Main furnace chamber is divided into primary zone, reburning zone and burning-out zone from bottom to top, in main furnace chamber primary zone circumference On be disposed with main combustion cyclone cylinder, the reburning fuel nozzle of main furnace chamber reburning zone is disposed with and fires cyclone cylinder or rotation again Wind gasification furnace, main furnace chamber burning-out zone circumference is disposed with fire air nozzle.

The present invention is further improved by: be disposed with the slag tap equipment of gradually-reducing shape structure bottom main furnace chamber.

The present invention is further improved by: one end of main combustion cyclone cylinder is provided with main fuel First air spout, The other end is provided with cyclone cylinder concave exit and is connected with main furnace chamber, and the circumference of main combustion cyclone cylinder is provided with Primary zone secondary Tangential Wind spout.

Station boiler uses the method that cyclone cylinder classification realizes fuel denitration by refueling, comprises the following steps:

1) fuel gas stream sent into by the First air import of main combustion cyclone cylinder, with main combustion cyclone cylinder side feeding Tangential secondary wind mixes strongly, wherein accounts for the main fuel of boiler total fuel consumption 70%~85% in excess air Factor alpha be 0.7~0.95 reducing atmosphere under burn, and generate containing NOxFlue gas;

2) the reburning fuel nozzle in top position, burner hearth primary zone is disposed with and fires cyclone cylinder or Cyclonic gasifying again Stove, wherein firing in cyclone cylinder again, the fuel of residue 15%~30% is in the strong reduction of excess air coefficient α < 1 Property atmosphere under there is half gasification reaction, or reacted by the addition generating gasification of gasifying agent in cyclone gasification furnace, Product contains the high-temperature gas with reproducibility, sprays into main furnace chamber as reburning fuel, in reproducibility With step 1 under atmosphere) generate containing NOxFlue gas generation reduction reaction, thus by NOxIt is reduced to N2

3) fuel is burnt completely required surplus air by being arranged in the burnout degree at main furnace chamber upper end position Spout sends into burner hearth, completes the after-flame of residual fuel under conditions of excess air coefficient α > 1.

The present invention is further improved by: described step 2) in, for firing cyclone cylinder again, fuel is in excess Air coefficient α be 0.6~0.85 strong reducing property atmosphere under burn, there is half gasification reaction;For whirlwind gas Change stove, make fuel generating gasification wherein react, by these by adding air or steam as gasifying agent Combustion product sprays into main furnace chamber as reburning fuel.

The present invention is further improved by: described step 3) in burning-out zone excess air coefficient α be 1.05~1.2.

The present invention is further improved by: be provided with in the bottom of main furnace chamber gradually-reducing shape structure for accepting rotation The slag tap equipment of air duct liquid slag.

Compared with prior art, the present invention proposes a kind of station boiler employing cyclone cylinder classification to realize fuel The system and method for denitration by refueling, has the advantage that

1, have benefited from ignition condition excellent in cyclone cylinder, compare conventional fuel reburning technology, primary zone Relatively smaller excess air coefficient α can be created, the most effectively inhibit primary zone NOxA large amount of raw Become, do not interfere with again the stable burning of main fuel in cylinder simultaneously.

2, when using cyclone furnace in station boiler, often a boiler can have several to tens of cyclone cylinders , the present invention compares original station boiler system, decreases the quantity of primary zone cyclone cylinder, exists simultaneously Reburning fuel nozzle is disposed with 1~2 and fires cyclone cylinder or cyclone gasification furnace again, will not make system the most completely Become more complicated, in terms of boiler manfacturing, also will not bring the problem that cost increases.

3, in the present invention, reburning fuel contains the fuel gas in a large number with reproducibility, both ensure that also NO in former districtxReduction efficiency, make again the burning of burning-out zone residual fuel be more prone to, it is most important that, This solves and carried when conventional fuel reburning technology obtains the reburning fuel such as microfine coal and natural gas The economy problems come.Pulverized coal particle in cyclone cylinder only needs the most broken simultaneously, compared with coal-powder boiler, It is greatly saved the great number cost that powder process power consumption is brought with complicated pulverized coal preparation system.

4, coal dust combustion product in firing cyclone cylinder or cyclone gasification furnace again contains a large amount of CO, nytron Things etc. have the high-temperature gas of reproducibility, compare the kind of tradition reburning fuel, not only reduce the reduction of group Effect is improved, and also compensate for not enough the lacking of reducing zone reaction temperature in conventional fuel reburning technology simultaneously Fall into.

5, for cyclone fired boilers, owing to the burning of main fuel is to carry out in cyclone cylinder, for the master of boiler Burner hearth saves a lot of space, solves in conventional fuel reburning technology reducing zone length to a certain extent not The problem of foot, improves the denitration efficiency of whole system further.

In sum, the present invention is by the way of using cyclone firing, it is ensured that catching fire and stable combustion of fuel Burn.On the basis of conventional fuel reburning technology, part of fuel is sent into and fires cyclone cylinder or cyclone gasification furnace again In carry out half gasification or the reaction that is gasified totally, using produce high-temperature gas product as reburning fuel, it is ensured that The quantity of reaction temperature required in reducing zone and effectively reduction group.Simultaneously because allow the combustion of deeper degree Material classification so that the reducing atmosphere of reducing zone has obtained further enhancing, improves the denitration effect of system Rate, the reburning fuel of gaseous state also makes the burning of burning-out zone be more prone to.The burning of main fuel is at cyclone cylinder In carry out, thus saved big quantity space for the reducing zone of main furnace chamber, solved conventional reducing zone curtailment Defect.Additionally, the pulverized coal particle in cyclone cylinders at different levels only needs the most broken, it is greatly saved powder process electricity The Cost Problems that consumption and complicated pulverized coal preparation system are brought, has that system is simple, with low cost, implement transformation holds The advantage such as easily.

Accompanying drawing illustrates:

Fig. 1 is that station boiler of the present invention uses cyclone cylinder classification to realize the signal of the system of fuel denitration by refueling Figure.

Wherein: 1, main combustion cyclone cylinder;2, main furnace chamber;3, cyclone cylinder or cyclone gasification furnace are fired again;4, again Combustion fuel nozzle ports;5, fire air nozzle;6, main fuel First air spout;7, primary zone secondary Tangential Wind Spout;8, cyclone cylinder concave exit;9, slag tap equipment.

Detailed description of the invention:

With instantiation, the present invention is described in further details below in conjunction with the accompanying drawings:

Station boiler of the present invention employing cyclone cylinder classification realizes the structural representation of the system of fuel denitration by refueling As shown in Figure 1.Include main combustion cyclone cylinder 1, main furnace chamber 2, fire cyclone cylinder or cyclone gasification furnace 3, more again Combustion fuel nozzle ports 4, fire air nozzle 5, main fuel First air spout 6, primary zone secondary Tangential Wind spout 7, Cyclone cylinder concave exit 8 and slag tap equipment 9.

The most main combustion cyclone cylinder 1 and the main furnace chamber 2 concave exit 8 seamless link by cyclone cylinder, main furnace chamber Bottom is disposed with slag tap equipment 9, and the reburning fuel nozzle above primary zone is disposed with and fires whirlwind again Cylinder or cyclone gasification furnace 3, be disposed with fire air nozzle 5 at certain position above burner hearth.

Station boiler of the present invention uses the method that cyclone cylinder classification realizes fuel denitration by refueling, the steps include: 1) The fuel gas stream sent into by the First air import of main combustion cyclone cylinder, strong with the secondary wind that cyclone cylinder side is sent into Mixing, completes the burning of major part fuel wherein, and generates containing finite concentration NOxFlue gas;2) exist Above burner hearth primary zone, the reburning fuel nozzle of certain position is disposed with and fires cyclone cylinder or cyclone gasification furnace again, Residue coal dust combustion product wherein is sprayed into main furnace chamber as secondary fuel from reburning fuel spout, and with Step 1) generate containing NOxFlue gas generation reduction reaction, thus by NOxIt is reduced to N2;3) will burning Required surplus air sends into burner hearth by being arranged in burnout degree (OFA) spout at the certain position of burner hearth upper end, Complete the burning of residual fuel.

Wherein step 1) described in main combustion cyclone cylinder in be passed through the 70%~85% of total fuel quantity, and in excess Air coefficient α be 0.7~0.95 reducing atmosphere under burn.Compare the fuel reburning technology of routine, Reburning fuel share has had a certain degree of increase, and the excess air coefficient in primary zone can reduce further simultaneously. So in cyclone cylinder, not only ensure that the burning that main fuel is good, stable, and effectively inhibit NOx A large amount of generations, the reburning fuel share the most suitably increased also makes the reduction of reburning zone on the original basis Property atmosphere has had further enhancing.

Step 2) described in reburning fuel can derive from the burning fired again in cyclone cylinder or cyclone gasification furnace and produce Thing.Wherein for firing cyclone cylinder again, the residual fuel of 15%~30% is 0.6~0.85 at excess air coefficient α Strong reducing property atmosphere under burn, there is half gasification reaction, effectively inhibit new NO simultaneouslyxGeneration;Right In cyclone gasification furnace, fuel generating gasification wherein can be made by adding air or steam anti-as gasifying agent Should, the combustion product of the two all contains CO, Hydrocarbon etc. and there is the high-temperature gas of reproducibility, by it As reburning fuel and the NO in the flue gas of primary zonexWhen there is reduction reaction, not only there is enough reproducibilities Group, also provides the hot environment needed for reduction reaction simultaneously, makes reduction efficiency be greatly promoted.

Step 3) in the excess air coefficient α of burning-out zone be 1.05~1.2, simultaneously because reburning fuel is predominantly Gas so that what after-flame herein became is more prone to, and improves the efficiency of combustion of integrated fuel further.

This device is in use, the First air carrying main fuel mixes with tangential high-voltage secondary wind, under burner hearth Form the strong flow field rotated in the several main combustion cyclone cylinder of end and complete under the atmosphere with certain reproducibility Burning;Generate containing finite concentration NOxFlue gas subsequently with fire again cyclone cylinder or cyclone gasification furnace supply There is reduction reaction in reburning fuel mixing, forms reburning zone so that the NO in flue gasxIt is reduced into N2, reach Purpose to boiler entirety denitration;The last burnout degree sent into fire air nozzle again mixes, and completes residue combustion The burning of material.

In specific implementation process, first carried the main fuel of 70%~85% by First air from main combustion cyclone cylinder First air spout 6 sprays into, and side, cyclone cylinder front end is disposed with the overfire air port 7 of tangential air intake, First air and Main fuel is sufficiently mixed in the strong rotational flow field that secondary wind is formed, and in the reduction of excess air coefficient α < 1 Property atmosphere in burn, generate containing finite concentration NOxFlue gas, the excess air coefficient α in primary zone is 0.7~0.95, not only ensure that the burning that main fuel is good, stable, the most effectively inhibit NO simultaneouslyxA large amount of Generate.Be disposed with reburning fuel spout above primary zone at certain position, reburning fuel by fire again cyclone cylinder or Combustion product in cyclone gasification furnace 3 provides, wherein firing in cyclone cylinder again, and the fuel of residue 15%~30% Burn under the strong reducing property atmosphere that excess air coefficient α is 0.6~0.85, half gasification reaction occurs, simultaneously Effectively inhibit new NOxGeneration;Or in cyclone gasification furnace, by adding air or water vapour conduct Gasifying agent makes fuel generating gasification react, and has reduction in a large number containing CO, Hydrocarbon etc. in product Property high-temperature gas, these gaseous products are sprayed into main furnace chamber as reburning fuel, mix with the flue gas in primary zone Closing, react under reducing atmosphere, gas reburning fuel provides the reduction needed for reduction reaction herein Group and hot environment.Simultaneously because the appropriateness increase of reburning fuel share so that the reproducibility gas of reducing zone Atmosphere further enhances, the NO contained in flue gasxTo more effectively be reduced to N2.Burning due to main fuel It is that the cyclone cylinder beyond burner hearth is carried out, is greatly saved the space of burner hearth, fires again compared to conventional fuel Technology, in the present invention, the length of burner hearth reducing zone has bigger growth, more effectively ensure that NOxSubtract Row's effect.Burnout degree (OFA) spout 5 it is disposed with, it is provided that surplus air needed for fuel combustion in burner hearth upper end, The excess air coefficient α of burning-out zone is 1.05~1.2.Simultaneously because reburning fuel composition is mainly fuel gas, Therefore the burning of burning-out zone residual fuel also becomes to be more prone to.

Above content is to combine concrete preferred implementation further description made for the present invention, no Can assert that the detailed description of the invention of the present invention is only limitted to this, for the ordinary skill of the technical field of the invention For personnel, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, All should be considered as belonging to the present invention and be determined scope of patent protection by the claims submitted to.

Claims (7)

1. station boiler uses cyclone cylinder classification to realize the system of fuel denitration by refueling, it is characterised in that: bag Include main combustion cyclone cylinder (1), main furnace chamber (2) and fire cyclone cylinder or cyclone gasification furnace (3) again;Wherein,
Main furnace chamber (2) is divided into primary zone, reburning zone and burning-out zone from bottom to top, in main furnace chamber (2) Main combustion cyclone cylinder (1) it is disposed with, the reburning fuel spout (4) of main furnace chamber (2) reburning zone in the circumference of primary zone Place is disposed with fires cyclone cylinder or cyclone gasification furnace (3) again, and main furnace chamber (2) burning-out zone circumference is disposed with after-flame Wind snout (5).
Station boiler the most according to claim 1 uses cyclone cylinder classification to realize fuel denitration by refueling System, it is characterised in that: main furnace chamber (2) bottom is disposed with the slag tap equipment (9) of gradually-reducing shape structure.
Station boiler the most according to claim 1 uses cyclone cylinder classification to realize fuel denitration by refueling System, it is characterised in that: one end of main combustion cyclone cylinder (1) is provided with main fuel First air spout (6), separately One end is provided with cyclone cylinder concave exit (8) and is connected with main furnace chamber, the circumference of main combustion cyclone cylinder (1) On be provided with primary zone secondary Tangential Wind spout (7).
4. station boiler uses the method that cyclone cylinder classification realizes fuel denitration by refueling, it is characterised in that bag Include following steps:
1) fuel gas stream sent into by the First air import of main combustion cyclone cylinder (1), with main combustion cyclone cylinder (1) The tangential secondary wind that side is sent into mixes strongly, wherein accounts for the main fuel of boiler total fuel consumption 70%~85% Burn under the reducing atmosphere that excess air coefficient α is 0.7~0.95, and generate containing NOxFlue gas;
2) reburning fuel spout (4) place in top position, burner hearth primary zone is disposed with and fires cyclone cylinder or rotation again Wind gasification furnace (3), wherein firing in cyclone cylinder again, the fuel of residue 15%~30% is at excess air coefficient α < 1 Strong reducing property atmosphere under there is half gasification reaction, or occurred by the addition of gasifying agent in cyclone gasification furnace Gasification reaction, contains the high-temperature gas with reproducibility, sprays into main furnace chamber as reburning fuel in product (2), under reducing atmosphere with step 1) generate containing NOxFlue gas generation reduction reaction, thus will NOxIt is reduced to N2
3) fuel is burnt completely required surplus air by being arranged at main furnace chamber (2) upper end position Fire air nozzle (5) sends into burner hearth, completes the after-flame of residual fuel under conditions of excess air coefficient α > 1.
Station boiler the most according to claim 4 uses cyclone cylinder classification to realize fuel denitration by refueling Method, it is characterised in that: described step 2) in, for firing cyclone cylinder again, fuel is at excess air coefficient α It is to burn under the strong reducing property atmosphere of 0.6~0.85, half gasification reaction occurs;For cyclone gasification furnace, pass through Add air or steam makes fuel generating gasification wherein react as gasifying agent, these gaseous combustions are produced Thing sprays into main furnace chamber (2) as reburning fuel.
Station boiler the most according to claim 4 uses cyclone cylinder classification to realize fuel denitration by refueling Method, it is characterised in that: described step 3) in burning-out zone excess air coefficient α be 1.05~1.2.
Station boiler the most according to claim 4 uses cyclone cylinder classification to realize fuel denitration by refueling Method, it is characterised in that: be provided with in the bottom of main furnace chamber (2) gradually-reducing shape structure for accepting cyclone cylinder liquid The slag tap equipment (9) of state slag.
CN201610397032.9A 2016-06-06 2016-06-06 System and method for achieving fuel reburning denitration through whirlwind cylinder grading of power station boiler CN105910097A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106895435A (en) * 2017-02-06 2017-06-27 中国国电集团公司谏壁发电厂 A kind of advanced denitration operation method of 1000MW ultra supercriticals tower-type furnace
CN107830514A (en) * 2017-10-28 2018-03-23 广东拓丰实业有限公司 A kind of gas fired-boiler flue gas recirculation low nitrogen combustion apparatus
CN107842849A (en) * 2017-10-31 2018-03-27 中国科学院力学研究所 A kind of low NO of cement decomposing furnace coal dust pre-vaporizedXCombustion system and method
CN109931597A (en) * 2018-11-20 2019-06-25 西安交通大学 A kind of fuel staging gasification and low NOXBurning boiler

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5878700A (en) * 1997-11-21 1999-03-09 The Babcock & Wilcox Company Integrated reburn system for NOx control from cyclone-fired boilers
US6085674A (en) * 1999-02-03 2000-07-11 Clearstack Combustion Corp. Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation
CN102062393A (en) * 2011-01-06 2011-05-18 西安交通大学 Cyclone burning method and device for reburning fuel in cyclone drum for denitration
CN102287812A (en) * 2011-07-15 2011-12-21 西安交通大学 Advanced staged air-burning denitrifying system and method for cyclone-burning boiler
CN102287813A (en) * 2011-07-15 2011-12-21 西安交通大学 Boiler device adopting cyclone-burning method
CN205746802U (en) * 2016-06-06 2016-11-30 西安交通大学 Station boiler uses cyclone cylinder classification to realize the system of fuel denitration by refueling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5878700A (en) * 1997-11-21 1999-03-09 The Babcock & Wilcox Company Integrated reburn system for NOx control from cyclone-fired boilers
US6085674A (en) * 1999-02-03 2000-07-11 Clearstack Combustion Corp. Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation
CN102062393A (en) * 2011-01-06 2011-05-18 西安交通大学 Cyclone burning method and device for reburning fuel in cyclone drum for denitration
CN102287812A (en) * 2011-07-15 2011-12-21 西安交通大学 Advanced staged air-burning denitrifying system and method for cyclone-burning boiler
CN102287813A (en) * 2011-07-15 2011-12-21 西安交通大学 Boiler device adopting cyclone-burning method
CN205746802U (en) * 2016-06-06 2016-11-30 西安交通大学 Station boiler uses cyclone cylinder classification to realize the system of fuel denitration by refueling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106895435A (en) * 2017-02-06 2017-06-27 中国国电集团公司谏壁发电厂 A kind of advanced denitration operation method of 1000MW ultra supercriticals tower-type furnace
CN107830514A (en) * 2017-10-28 2018-03-23 广东拓丰实业有限公司 A kind of gas fired-boiler flue gas recirculation low nitrogen combustion apparatus
CN107842849A (en) * 2017-10-31 2018-03-27 中国科学院力学研究所 A kind of low NO of cement decomposing furnace coal dust pre-vaporizedXCombustion system and method
CN109931597A (en) * 2018-11-20 2019-06-25 西安交通大学 A kind of fuel staging gasification and low NOXBurning boiler
CN109931597B (en) * 2018-11-20 2020-01-21 西安交通大学 Fuel staged gasification and low NOXCombustion boiler

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