CN106051748A - Coal thrower chain boiler for reducing NOx emission through flue gas recirculation - Google Patents

Coal thrower chain boiler for reducing NOx emission through flue gas recirculation Download PDF

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Publication number
CN106051748A
CN106051748A CN201610354539.6A CN201610354539A CN106051748A CN 106051748 A CN106051748 A CN 106051748A CN 201610354539 A CN201610354539 A CN 201610354539A CN 106051748 A CN106051748 A CN 106051748A
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China
Prior art keywords
air
flue gas
fan
gas recirculation
nox emission
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CN201610354539.6A
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Chinese (zh)
Inventor
凌忠钱
曾宪阳
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China Jiliang University
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China Jiliang University
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Priority to CN201610354539.6A priority Critical patent/CN106051748A/en
Publication of CN106051748A publication Critical patent/CN106051748A/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 
    • 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 
    • F23C9/00Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
    • 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 
    • F23C2202/00Fluegas recirculation
    • F23C2202/30Premixing fluegas with combustion air

Abstract

The invention discloses a coal thrower chain boiler for reducing NOx emission through flue gas recirculation. The coal thrower chain boiler comprises a chain grate stoker, a coal thrower, a hearth, a boiler barrel, a coal economizer, an air pre-heater, a dust remover, a desulfurization tower, an induced draft fan, a chimney, a primary air fan, a secondary air fan and a flue gas recirculation air fan. The lower portion of the chain grate stoker is provided with a plurality of primary air chambers. Air is sucked through the primary air fan, then is preheated through the air pre-heater, forms primary air and is fed into all the primary air chambers. The preheated air is extracted from a primary air pipeline by the secondary air fan, forms secondary air and is fed into the hearth and the coal thrower. A flue gas recirculation main pipeline is led out in the position, between the dust remover and the desulfurization tower, of a flue gas pipeline, and the flue gas recirculation air fan is installed in the flue gas recirculation main pipeline. Two recirculation flue gas branched pipelines are connected to the positions, at an outlet of the flue gas recirculation air fan, of the flue gas recirculation main pipeline and are used for feeding recirculation flue gas into the primary air chambers and an inlet of the secondary air fan correspondingly. According to the coal thrower chain boiler for reducing NOx emission through flue gas recirculation, the investment cost is low, the transformation period is short, and NOx emission can be reduced by 50% or above.

Description

Flue gas recirculation is used to reduce the spreader stoker chain boiler of NOx emission
Technical field
The present invention relates to a kind of spreader stoker chain boiler, be specifically related to a kind of use flue gas recirculation to reduce NOx emission Spreader stoker chain boiler, belongs to Industrial Boiler environmental technology field.
Background technology
Chain furnace is widely used in China's coal-burned industrial boiler, is the major way of industrial boilers in China combustion apparatus, Account for the 60% of Industrial Boiler total amount.Chain furnace often uses in town dweller concentration zones, and mostly is low-altitude discharged so that industry pot Stove is to surrounding, and particularly town environment pollutes and is particularly acute, and the share that NOx occupies in pollutant is bigger.As chain The one of bar oven, spreader stoker chain boiler grows up on the basis of forward chain grate boiler, passes through traveling-grate stoker Mechanical wind-force in reversion and boiler front wall throws coal equipment so that pulverized coal particle layer distributed, fine-dusty coal successively on grate surface Then furnace cavity be suspended state distribution, there is the feature of chain furnace grate firing, have again the feature of suspension combustion coal-powder boiler.But by Limitation in the design of its structure, its NOx emission concentration is general all at 500mg/Nm3Above, the up to 1000mg/Nm having3With On, substantially exceed the key area chain furnace NO that " emission standard of air pollutants for boilers " (GB13271 2014) specifiesxThe highest Permission concentration of emission is 200mg/m3.Reduce chain-grate boiler NOx emission the most cost-effectively, have for alleviating atmospheric pollution Highly important meaning.
At present, the technology controlling NOx emission can be divided into two classes: a class is flue gases purification, i.e. the NOx generated It is reduced into N2, thus remove the NOx in flue gas;Another kind of is low NOx combusting technology (or denitrogenation technology in stove), is transported by boiler The improvement of line mode or the control to combustion process, the generation of NOx in suppression combustion process.But, above two class NOx emission controls Technology processed is applied to coal-fired power station boiler mostly, still lacks actual application example on Industrial Boiler.
On December 11st, 2015, Chinese Ministry of Environmental Protection, the Committee of Development and Reform, Bureau of Energy issue and " implement in full coal-burning power plant's minimum discharge and joint Can retrofit work scheme ", specify minimum discharge timetable, by complete before eastern region in the original plan the year two thousand twenty minimum discharge ( Under the conditions of benchmark oxygen content 6%, NOx emission concentration is not higher than 50mg/m3) transformation task, totally complete before being advanced to 2017. In this context, the NOx emission of coal-burned industrial boiler requires harsher, however not excluded that this discharge standard be promoted to from now on 100mg/m3.These are for the most of medium-sized and small enterprises having Industrial Boiler, and its vivosphere faces a severe challenge, and compels to be essential There is remodeling method and the technology suitably controlling NOx emission.
Summary of the invention
It is an object of the invention to provide a kind of spreader stoker chain boiler transformation side using flue gas recirculation to reduce NOx emission Method and technology.
For achieving the above object, the technical scheme is that the spreader feeder chain using flue gas recirculation to reduce NOx emission Bar boiler, including traveling-grate stoker, spreader feeder, burner hearth, drum, economizer, air preheater, cleaner unit, desulfurizing tower, air-introduced machine, Chimney, primary air fan, overfire air fan and gas recirculating fan;Described traveling-grate stoker lower area has a multiple air compartment; Described burner hearth back-end ductwork economizer, air preheater, cleaner unit, desulfurizing tower, air-introduced machine and chimney have been sequentially arranged;Institute The primary air fan stated preheats through air preheater after sucking air, forms First air, sends in each air compartment;Described Overfire air fan extracts the air after preheating from First air pipeline, forms secondary wind, sends into burner hearth and spreader feeder;Described dedusting At flue between device and desulfurizing tower, draw a flue gas recirculation main pipeline, flue gas recirculation main pipeline is provided with Gas recirculating fan;The main pipeline of described gas recirculating fan outlet is divided into two, and connects and has two flue gas recycleds Subtube, sends into each air compartment and entrance of overfire air fan respectively by flue gas recycled.
The inlet and outlet of described gas recirculating fan, is respectively arranged with valve, controls the ratio of flue gas recycled Example;In two flue gas recycled subtubes, partial fume is respectively fed to each air compartment by a subtube, passes through valve Control to send into the exhaust gas volumn of each air compartment, after this flue gas mixes with the First air in each air compartment, send into each First air The fire grate that room is corresponding;An other subtube is connected to the entrance of overfire air fan, sends into the cigarette in secondary wind by Valve controlling Gas ratio, after this partial fume mixes with secondary wind, by overfire air fan, is respectively fed to burner hearth front wall overfire air port, burner hearth Rear wall overfire air port and the coal feeding wind pipe of spreader feeder.
Described traveling-grate stoker is forward-moving grate, and lower region thereof has a multiple air compartment (4 ~ 6 air compartments), along chain The traffic direction of fire grate arranges in " one " word, and the outlet of multiple air compartments communicates with traveling-grate stoker, in order to supply traveling-grate stoker First air needed for upper coal combustion.
Described spreader feeder is mechanical wind-force coal thrower, throws coal by machinery, throws coal big for granularity at back of furnace row, grain Spend little coal and throw at fire grate anterior, it is ensured that granule coal dust is uniformly distributed on grate surface;Throw coal by wind-force, spreader feeder will be fallen into In fine breeze be blown into burner hearth.
Described First air and the ratio of secondary wind remain unchanged substantially, and primary air ratio and secondary air ratio control 80% He About 20%.
The described primary air flow entering multiple air compartments, by flap valve control, air zoning is given according to a certain percentage Chain fire-gate coal combustion, its range of accommodation is between 0% ~ 100%.
In described secondary wind, after sending into burner hearth front wall overfire air port, burner hearth, wall overfire air port and spreader feeder are thrown The secondary wind ratio of coal airduct remains unchanged substantially, and its secondary wind ratio is respectively 40%, 40% and about 20%.
Described gas recirculating fan, its introduce exhaust gas volumn number, i.e. flue gas recirculation rate, according to boiler load Size, by the regulation of valve, controls to change in the range of 5.0% ~ 25%.
Described gas recirculating fan, its exhaust gas volumn introduced, it is respectively fed to two flue gas recycled subtubes, wherein Send into the exhaust gas volumn of secondary wind pipeline, account for gas recirculating fan and introduce the 0% ~ 30% of exhaust gas volumn.
The described flue gas recycled amount entering multiple air compartments is the most adjustable, and according to Actual combustion operating mode, it regulates model It is trapped among between 0% ~ 100%.
More than use flue gas recirculation to reduce spreader stoker chain boiler remodeling method and the technology of NOx emission, mainly pass through Increase a gas recirculating fan, section of tubing and valve and reduce NOx emission: (1) by multiple air compartments once The air zoning of wind, makes the Volatile of coal-burning particle, early stage of catching fire and burn be in the atmosphere of oxygen deprivation, at reproducibility gas Under atmosphere, a large amount of fuel bound nitrogens of release are changed into N2Rather than it is oxidized to NOx;(2) partial fume is introduced many by gas recirculating fan An individual air compartment, control enter multiple air compartments flue gas recycled amount, postpone coal-burning particle burning, reduce ignition temperature and Oxygen concentration, promotes that volatile matter separates out under the atmosphere of oxygen deprivation, the generation of suppression NOx;(3) gas recirculating fan is by part cigarette Pneumatic transmission enters secondary wind, reduces the concentration of oxygen in secondary wind, and secondary wind strengthens the disturbance of air-flow in burner hearth after sending into burner hearth And mixing, it is to avoid flame burns under high temperature and oxygen-enriched state, it is suppressed that a large amount of generations of suspension combustion district NOx.
A kind of spreader stoker chain boiler remodeling method using flue gas recirculation to reduce NOx emission of present invention proposition and skill Art, it is not necessary to boiler is carried out bigger change, it is only necessary to increase gas recirculating fan, partial fume pipeline, a valve And instrument, cost of investment is few, and the transformation cycle is short, can realize NOx abatement more than 50%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In Fig. 1,1-traveling-grate stoker;2-spreader feeder;3-burner hearth;4-drum;5-economizer;6-air preheater;7-dedusting Device;8-desulfurizing tower;9-air-introduced machine;10-chimney;11-gas recirculating fan;12-primary air fan;13-overfire air fan;1# ~ Air compartment 1 ~ 4 of 4#-;A-front wall overfire air port;Wall overfire air port after b-;K1 ~ k4-flap valve 1 ~ 4;k5 ~ K11-valve 5 ~ 11.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, use flue gas recirculation to reduce the spreader stoker chain boiler of NOx emission, including traveling-grate stoker 1, throw Coal machine 2, burner hearth 3, drum 4, economizer 5, air preheater 6, cleaner unit 7, desulfurizing tower 8, air-introduced machine 9, chimney 10, flue gas follow again Ring blower fan 11, primary air fan 12 and overfire air fan 13;Described traveling-grate stoker 1 lower area has a multiple air compartment (1# ~ 4# It is an air compartment 1 ~ 4);Described burner hearth 3 back-end ductwork is sequentially arranged economizer 5, air preheater 6, cleaner unit 7, has taken off Sulfur tower 8, air-introduced machine 9 and chimney 10;Described primary air fan 12 preheats through air preheater 6 after sucking air, is formed once Wind, sends in each air compartment (1#, 2#, 3#, 4#);After described overfire air fan 13 extracts preheating from First air pipeline Air, forms secondary wind, sends into burner hearth 3 and spreader feeder 2;At flue between described cleaner unit 7 and desulfurizing tower 8, draw Go out a flue gas recirculation main pipeline, flue gas recirculation main pipeline is provided with gas recirculating fan 11;Described flue gas is again At the main pipeline of circulating fan 11 outlet, connect and have two flue gas recycled subtubes, respectively flue gas recycled is sent into each Air compartment (1#, 2#, 3#, 4#) and the entrance of overfire air fan 13.
The inlet and outlet of described gas recirculating fan 11, is respectively arranged with valve k9 and k10, controls recirculation cigarette The ratio of gas.In two flue gas recycled subtubes, partial fume is respectively fed to each air compartment by a subtube (1#, 2#, 3#, 4#), controls to send into the exhaust gas volumn of each air compartment (1#, 2#, 3#, 4#), this flue gas by valve k5 ~ k8 After mixing with the First air in each air compartment (1#, 2#, 3#, 4#), send into each air compartment (1#, 2#, 3#, 4#) corresponding Fire grate;Another subtube is connected to the entrance of overfire air fan 13, controls to send into the cigarette in overfire air fan 13 by valve k11 Gas ratio, after this partial fume mixes with secondary wind, by overfire air fan 13, be respectively fed to burner hearth 3 front wall overfire air port a, The coal feeding wind pipe of wall overfire air port b and spreader feeder 2 after burner hearth 3.
Described traveling-grate stoker 1 is forward-moving grate, and lower region thereof has a multiple air compartment, and (1#, 2#, 3#, 4# typically have 4 ~ 6 air compartments), the traffic direction along traveling-grate stoker 1 arranges in " one " word;Multiple one time air compartment (1#, 2#, 3#, 4#) goes out Mouthful communicate with traveling-grate stoker 1, in order to supply on traveling-grate stoker 1 First air needed for coal combustion.
Described spreader feeder 2 is mechanical wind-force coal thrower, throws coal by machinery, throws coal big for granularity at traveling-grate stoker 1 Rear portion, the coal that granularity is little is thrown at traveling-grate stoker 1 anterior, it is ensured that granule coal dust is uniformly distributed on the row face of traveling-grate stoker 1;Pass through Wind-force throws coal, and the fine breeze fallen in spreader feeder 2 is blown into burner hearth 3.
Described First air and the ratio of secondary wind remain unchanged substantially, and primary air ratio and secondary air ratio control 80% He About 20%.
The primary air flow of the multiple air compartment (1#, 2#, 3#, 4#) of described entrance, is controlled by flap valve k1 ~ k4, presses According to certain proportion air zoning to the coal combustion of traveling-grate stoker 1, the range of accommodation of flap valve k1 ~ k4 0% ~ 100% it Between.
In described secondary wind, send into wall overfire air port b and throwing coal after burner hearth 3 front wall overfire air port a, burner hearth 3 The secondary wind ratio of machine 2 coal feeding wind pipe remains unchanged substantially, and its secondary wind ratio is respectively 40%, 40% and about 20%.
Described gas recirculating fan 11, its introduce exhaust gas volumn number, i.e. flue gas recirculation rate, according to boiler load Size, by the regulation of valve k9, control in the range of 5.0% ~ 25% change.
Described gas recirculating fan 11, its exhaust gas volumn introduced, it is respectively fed to two flue gas recycled subtubes, its The exhaust gas volumn of middle feeding secondary wind pipeline, accounts for gas recirculating fan 11 and introduces the 0% ~ 30% of exhaust gas volumn.
The flue gas recycled amount of the multiple air compartment (1#, 2#, 3#, 4#) of described entrance is the most adjustable, according to Actual combustion Operating mode, the range of accommodation of its valve k5 ~ k8 is between 0% ~ 100%.
The present invention is applicable to spreader stoker chain boiler.The foregoing is only the detailed description of the invention of the present invention, but this area The various changes and modifications that just can make without creative work of those of ordinary skill, the most within the scope of the present invention.

Claims (6)

1. use flue gas recirculation reduce NOx emission spreader stoker chain boiler, including traveling-grate stoker 1, spreader feeder 2, burner hearth 3, Drum 4, economizer 5, air preheater 6, cleaner unit 7, desulfurizing tower 8, air-introduced machine 9, chimney 10, gas recirculating fan 11, Secondary blower fan 12 and overfire air fan 13;Described traveling-grate stoker 1 lower area has a multiple air compartment (1#, 2#, 3#, 4#);Described Burner hearth 3 back-end ductwork in be sequentially arranged economizer 5, air preheater 6, cleaner unit 7, desulfurizing tower 8, air-introduced machine 9 and chimney 10;Described primary air fan 12 preheats through air preheater 6 after sucking air, forms First air, sends into each air compartment In (1#, 2#, 3#, 4#);Described overfire air fan 13 extracts the air after preheating from First air pipeline, forms secondary wind, send Enter burner hearth 3 and spreader feeder 2;At flue between described cleaner unit 7 and desulfurizing tower 8, draw a flue gas recirculation master Pipeline, is provided with gas recirculating fan 11 in flue gas recirculation main pipeline;The master of described gas recirculating fan 11 outlet At pipeline, connect have two flue gas recycled subtubes, respectively flue gas recycled is sent into each air compartment (1#, 2#, 3#, 4#) and the entrance of overfire air fan 13.
2. the spreader stoker chain boiler using flue gas recirculation to reduce NOx emission as claimed in claim 1, it is characterised in that: The inlet and outlet of described gas recirculating fan 11, is respectively arranged with valve k9 and k10, controls the ratio of flue gas recycled Example;In two flue gas recycled subtubes, subtube partial fume is respectively fed to each air compartment (1#, 2#, 3#, 4#), control to send into the exhaust gas volumn of each air compartment (1#, 2#, 3#, 4#) by valve k5 ~ k8, this flue gas and each After First air mixing in air compartment (1#, 2#, 3#, 4#), send into the stove that each air compartment (1#, 2#, 3#, 4#) is corresponding Row;Another subtube is connected to the entrance of overfire air fan 13, controls to send into the flue gas ratio in overfire air fan 13 by valve k11 Example, after this partial fume mixes with secondary wind, by overfire air fan 13, is respectively fed to burner hearth 3 front wall overfire air port a, burner hearth 3 Rear wall overfire air port b and the coal feeding wind pipe of spreader feeder 2.
3. the spreader stoker chain boiler using flue gas recirculation to reduce NOx emission as claimed in claim 1, it is characterised in that: Described traveling-grate stoker 1 is forward-moving grate, and lower region thereof has a multiple air compartment, and (1#, 2#, 3#, 4# typically have 4 ~ 6 Air compartment), the traffic direction along traveling-grate stoker 1 arranges in " one " word;The outlet of multiple air compartments (1#, 2#, 3#, 4#) and chain Fire grate 1 communicates, in order to supply on traveling-grate stoker 1 First air needed for coal combustion;Enter a multiple air compartment (1#, 2#, 3#, Primary air flow 4#), is controlled by flap valve k1 ~ k4, and air zoning is to the coal combustion of traveling-grate stoker 1 according to a certain percentage, The range of accommodation of flap valve k1 ~ k4 is between 0% ~ 100%.
4. the spreader stoker chain boiler using flue gas recirculation to reduce NOx emission as claimed in claim 1, it is characterised in that: Described gas recirculating fan 11, its introduce exhaust gas volumn number, i.e. flue gas recirculation rate, according to the size of boiler load, By the regulation of valve k9, control to change in the range of 5.0% ~ 25%.
5. the spreader stoker chain boiler using flue gas recirculation to reduce NOx emission as claimed in claim 1, it is characterised in that: Described gas recirculating fan 11, its exhaust gas volumn introduced, it is respectively fed to two flue gas recirculation subtubes, wherein sends into two The exhaust gas volumn of secondary wind pipeline, accounts for gas recirculating fan 11 and introduces the 0% ~ 30% of exhaust gas volumn.
6. the spreader stoker chain boiler using flue gas recirculation to reduce NOx emission as claimed in claim 1, it is characterised in that: The flue gas recycled amount of the multiple air compartment (1#, 2#, 3#, 4#) of described entrance is the most adjustable, according to Actual combustion operating mode, and its valve The range of accommodation of door k5 ~ k8 is between 0% ~ 100%.
CN201610354539.6A 2016-05-26 2016-05-26 Coal thrower chain boiler for reducing NOx emission through flue gas recirculation Pending CN106051748A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439792A (en) * 2016-11-24 2017-02-22 烟台龙源电力技术股份有限公司 Chain furnace system and combustion method of chain furnace
CN106594710A (en) * 2016-12-19 2017-04-26 哈尔滨工业大学 Independent partitioned grate firing flue gas circulation combustion system and use method thereof
CN106678776A (en) * 2017-01-23 2017-05-17 上海华之邦科技股份有限公司 Smoke recycling stokerfeed boiler and smoke recycling multi-layer air distributing control method
CN109708101A (en) * 2018-12-10 2019-05-03 安徽金禾实业股份有限公司 The device of coal-fired fluidized bed boiler flue gas recirculation inhibition nitrogen oxides yield

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB228897A (en) * 1924-02-06 1925-12-03 Erich Roucka Means for regulating the draught in a smoke flue common to a plurality of boilers
CN201382408Y (en) * 2009-04-07 2010-01-13 陈静 Boiler flue gas recirculation device
CN104296128A (en) * 2014-07-24 2015-01-21 泉州市天龙环境工程有限公司 Device and method for reducing nitrogen oxide (NOx) emission by recycling exhaust gas of chain-grate boiler
CN104748104A (en) * 2015-03-13 2015-07-01 江苏盛凯环保工程有限公司 Coupling staged combustion and smoke recirculation low NOx chain grate furnace
CN205807453U (en) * 2016-05-26 2016-12-14 中国计量学院 A kind of spreader stoker chain boiler using flue gas recirculation to reduce NOx emission

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB228897A (en) * 1924-02-06 1925-12-03 Erich Roucka Means for regulating the draught in a smoke flue common to a plurality of boilers
CN201382408Y (en) * 2009-04-07 2010-01-13 陈静 Boiler flue gas recirculation device
CN104296128A (en) * 2014-07-24 2015-01-21 泉州市天龙环境工程有限公司 Device and method for reducing nitrogen oxide (NOx) emission by recycling exhaust gas of chain-grate boiler
CN104748104A (en) * 2015-03-13 2015-07-01 江苏盛凯环保工程有限公司 Coupling staged combustion and smoke recirculation low NOx chain grate furnace
CN205807453U (en) * 2016-05-26 2016-12-14 中国计量学院 A kind of spreader stoker chain boiler using flue gas recirculation to reduce NOx emission

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439792A (en) * 2016-11-24 2017-02-22 烟台龙源电力技术股份有限公司 Chain furnace system and combustion method of chain furnace
CN106439792B (en) * 2016-11-24 2019-05-21 烟台龙源电力技术股份有限公司 Chain furnace system and mode chain furnace combustion method
CN106594710A (en) * 2016-12-19 2017-04-26 哈尔滨工业大学 Independent partitioned grate firing flue gas circulation combustion system and use method thereof
CN106678776A (en) * 2017-01-23 2017-05-17 上海华之邦科技股份有限公司 Smoke recycling stokerfeed boiler and smoke recycling multi-layer air distributing control method
CN109708101A (en) * 2018-12-10 2019-05-03 安徽金禾实业股份有限公司 The device of coal-fired fluidized bed boiler flue gas recirculation inhibition nitrogen oxides yield

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