CN101799172A - High-temperature oxygen-rich coal dust grading ignition device - Google Patents

High-temperature oxygen-rich coal dust grading ignition device Download PDF

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Publication number
CN101799172A
CN101799172A CN201010115544A CN201010115544A CN101799172A CN 101799172 A CN101799172 A CN 101799172A CN 201010115544 A CN201010115544 A CN 201010115544A CN 201010115544 A CN201010115544 A CN 201010115544A CN 101799172 A CN101799172 A CN 101799172A
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CN
China
Prior art keywords
coal dust
temperature oxygen
level
temperature
oxygen
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Pending
Application number
CN201010115544A
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Chinese (zh)
Inventor
刘国伟
董芃
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Harbin Institute of Technology
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Harbin Institute of Technology
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Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN201010115544A priority Critical patent/CN101799172A/en
Publication of CN101799172A publication Critical patent/CN101799172A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention discloses a high-temperature oxygen-rich coal dust grading ignition device applied to a coal dust boiler. By adopting a mode of mixing high-temperature oxygen-rich gas with coal dust air current, high-concentration coal dust air current of a center tube is directly heated and ignited, then a second-stage coal dust air current is ignited by ignited coal dust of the center tube and higher-stage coal dust air current or the whole coal dust combustor is ignited by the ignited second-stage coal dust; after the whole coal dust combustor is ignited, the high-temperature oxygen-rich gas is replaced by combustion-supporting secondary air; meanwhile, the position of an axial movable vortex blade can be changed, a flow filed of the combustor can be adjusted and the stable combustion can be realized.

Description

High-temperature oxygen-rich coal dust grading ignition device
Technical field
The present invention relates to a kind of pulverized-coal fired boiler high-temperature oxygen-rich coal dust grading ignition device.
Background technology
At present conventional pulverized-coal fired boiler adopts mostly is the igniting that the mode of fuel oil or combustion gas realizes coal burner.This mode is to be fuel with specific fuel oil or combustion gas, at first lights fuel oil or combustion gas by special igniter, by the fuel oil lighted or the combustion gas breeze airflow that ignites, realizes the igniting of coal burner then.The major defect of this mode is: in igniting and the steady combustion process of catching fire afterwards thereof, need to consume a large amount of fuel oil or combustion gas, financial cost is huge; Special igniter need be set be used to light fuel oil (gas) oil (gas) rifle, and the existing in the size that limited burner to a certain extent, increased cost of igniter and fuel oil (gas) oil (gas) rifle.
High-temperature oxygen-rich coal dust grading ignition device of the present invention can whole substitute equipment such as traditional igniter and fuel oil (gas) oil (gas) rifle, by mixing of high-temperature oxygen-enriched gas and breeze airflow, realizes that directly the safety and stability of coal powder fired boiler burner is lighted a fire.
Summary of the invention
In order effectively to reduce the igniting cost of pulverized-coal fired boiler, improve the security and the stability of ignition process, the mode that the present invention adopts high-temperature oxygen-enriched gas to mix with breeze airflow, directly add thermal ignition central tube high concentration pulverized coal air-flow, then by the central tube coal dust that the catches fire second level breeze airflow that ignites, again by the second level coal dust that catches fire ignite more senior breeze airflow or whole coal burner.
Parts such as (third level coal dust passage are set in case of necessity) that high-temperature oxygen-rich coal dust grading ignition device of the present invention totally can be divided into central tube coal dust passage, high-temperature oxygen-enriched gas circular passage, is axially moveable the eddy flow impeller, second level coal dust directly sprays passage.Its course of work is as follows: when the high concentration pulverized coal air-flow blows out from central tube coal dust passage in the mode of directly blowing, through (temperature>800 ℃ of the high-temperature oxygen-enriched gas after the heating, oxygen volume share>50%) blows out with cyclone mode by the eddy flow impeller that is axially moveable in the circular passage, mix mutually with the breeze airflow that central tube blows out.Along with the carrying out that mixes, the oxygen volume share of breeze airflow constantly increases, and ignition temperature constantly descends, and meanwhile, breeze airflow is constantly heated, and temperature constantly raises, and up to the ignition temperature that reaches breeze airflow, breeze airflow is lighted.Then, second level breeze airflow directly sprays passage in the mode of directly blowing from second level coal dust and blows out, and concentrates to the center under the guide functions of spout, and the central tube coal dust that has been caught fire ignites.Afterwards, light whole coal burner (third level coal dust passage is set in case of necessity,, lights whole coal burner by the third level coal dust that catches fire again) by the second level coal dust that has caught fire by the second level coal dust that the catches fire third level breeze airflow that ignites.After whole coal burner is lighted, stop the output of high-temperature oxygen-enriched gas, replace with combustion-supporting secondary wind air, change simultaneously is axially moveable the eddy flow impeller location, adjusts the burner flow field, effectively realizes steady the combustion.
The advantage of high-temperature oxygen-rich coal dust grading ignition device of the present invention is as follows:
1. do not need special igniter fuels such as fuel oil or combustion gas, reduced the igniting cost of pulverized-coal fired boiler effectively;
2. do not need special igniter and fuel oil (gas) oil (gas) rifle,, reduced equipment cost simultaneously yet for the design of burner provides convenience;
3. be axially moveable the eddy flow impeller location by change, can adjust the fire location of combustor flow field, change breeze airflow, guarantee effectively to realize that igniting reaches steady combustion.
Description of drawings
Accompanying drawing is the schematic diagram of apparatus of the present invention.
Reference numeral: 1, central tube coal dust passage; 2, second level coal dust directly sprays the passage spout; 3, high-temperature oxygen-enriched gas circular passage spout; 4, be axially moveable the eddy flow impeller; 5, second level coal dust directly sprays passage; 6, the second level breeze airflow crust of weathering; 7, high-temperature oxygen-enriched gas circular passage: 8, eddy flow impeller connecting rod; 9, eddy flow impeller handle.
The specific embodiment
As shown in the figure, high-temperature oxygen-rich coal dust grading ignition device by 1, central tube coal dust passage; 2, second level coal dust directly sprays the passage spout; 3, high-temperature oxygen-enriched gas circular passage spout; 4, be axially moveable the eddy flow impeller; 5, second level coal dust directly sprays passage; 6, the second level breeze airflow crust of weathering; 7, high-temperature oxygen-enriched gas circular passage; 8, eddy flow impeller connecting rod; 9, eddy flow impeller handle is formed.The concrete size of each several part changes with the variation of relevant parameter, wherein the sectional dimension of each coal dust passage is calculated by its corresponding power, primary wind and powder concentration, primary air velocity degree, and the temperature of high-temperature oxygen-enriched gas, oxygen volume share and circular passage size thereof are calculated by central tube breeze gas flow temperature, speed, pulverized-coal concentration.
As shown in the figure, the concrete running of high-temperature oxygen-rich coal dust grading ignition device is: the breeze airflow of high concentration blows out in the mode of directly blowing from central tube coal dust passage 1, simultaneously, high-temperature oxygen-enriched gas is by circular passage 7 and be axially moveable eddy flow impeller 4 and blow out from circular passage spout 3, mix mutually with the breeze airflow that central tube blows out, and add thermal ignition central tube breeze airflow; Then, open the output of second level coal dust, make second level breeze airflow by the breeze airflow crust of weathering 6, directly spray passage 5, blow out from straight spray passage spout 2 in the mode of directly blowing, second level breeze airflow is concentrated to the center under the guide functions of straight spray passage spout 2, and the central tube coal dust that has been caught fire ignites.So far, high-temperature oxygen-rich coal dust grading ignition device is lighted, just can light whole coal burner by it afterwards.After whole coal burner is lighted, high-temperature oxygen-enriched gas is replaced with combustion-supporting secondary wind air, spur eddy flow impeller handle 9 simultaneously, change the position that is axially moveable eddy flow impeller 4 by eddy flow impeller connecting rod 8 and adjust the burner flow field to realize steady combustion.

Claims (5)

1. high-temperature oxygen-rich coal dust grading ignition device is characterised in that: the mode that adopts high-temperature oxygen-enriched gas to mix with breeze airflow, and directly add the thermal ignition breeze airflow and realize igniting, do not use other igniters such as any igniter or oil (gas) rifle in the whole process.
2. high-temperature oxygen-rich coal dust grading ignition device according to claim 1, in ignition process, it is characterized in that: at first adopt high-temperature oxygen-enriched gas directly to add thermal ignition central tube high concentration pulverized coal air-flow, then by the central tube coal dust that the catches fire second level breeze airflow that ignites, (third level coal dust passage is set in case of necessity by the second level coal dust that the catches fire whole coal burner that ignites again, by the second level coal dust that the catches fire third level breeze airflow that ignites, light whole coal burner by third level coal dust again).
3. according to claim 1,2 described high-temperature oxygen-rich coal dust grading ignition devices, it is characterized in that: after whole coal burner is lighted, high-temperature oxygen-enriched gas is replaced with combustion-supporting secondary wind air, change simultaneously is axially moveable the eddy flow impeller location, adjust the burner flow field, realize surely combustion.
4. according to claim 1,2,3 described high-temperature oxygen-rich coal dust grading ignition devices, its architectural feature is: high-temperature oxygen-rich coal dust grading ignition device by central tube coal dust passage (1), second level coal dust directly spray passage spout (2), high-temperature oxygen-enriched gas circular passage spout (3), be axially moveable eddy flow impeller (4), second level coal dust directly sprays passage (5), the second level breeze airflow crust of weathering (6), high-temperature oxygen-enriched gas circular passage (7), eddy flow impeller connecting rod (8), eddy flow impeller handle (9) are formed, the concrete size of each several part changes with the variation of relevant parameter.
5. according to claim 1,2,3 described high-temperature oxygen-rich coal dust grading ignition devices, it is characterized in that: the temperature of high-temperature oxygen-enriched gas>800 ℃, oxygen volume share>50%, concrete temperature, oxygen volume share are calculated by central tube breeze gas flow temperature, speed, pulverized-coal concentration.
CN201010115544A 2010-03-02 2010-03-02 High-temperature oxygen-rich coal dust grading ignition device Pending CN101799172A (en)

Priority Applications (1)

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CN201010115544A CN101799172A (en) 2010-03-02 2010-03-02 High-temperature oxygen-rich coal dust grading ignition device

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Application Number Priority Date Filing Date Title
CN201010115544A CN101799172A (en) 2010-03-02 2010-03-02 High-temperature oxygen-rich coal dust grading ignition device

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CN101799172A true CN101799172A (en) 2010-08-11

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102261649A (en) * 2010-10-22 2011-11-30 魏伯卿 Temperature-gathering type combustion furnace self-preheating oxygen enriched burner with oxygen enriched nozzle
CN102401373A (en) * 2010-09-09 2012-04-04 哈尔滨工业大学 Three-volute high temperature oxygen rich pulverized coal ignition device
CN102494340A (en) * 2011-12-16 2012-06-13 哈尔滨工业大学 Pulverized coal high-temperature oxygen ignition method and device
CN102620292A (en) * 2012-04-23 2012-08-01 哈尔滨工业大学 High-temperature oxygen-rich igniting flame stabilizer for pulverized coal
CN105202575A (en) * 2015-10-13 2015-12-30 徐州科融环境资源股份有限公司 Ignition method and device through high-temperature high oxygen torch generated by coal powder or crushed coal combustion
CN108085483A (en) * 2017-12-15 2018-05-29 湖南景远微波科技有限公司 A kind of oxygen-enriched microwave igniter of step heat supply

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1818476A (en) * 2006-03-24 2006-08-16 王福林 Oxygen-enriched igniting and firing stabilizer without oil
CN1920382A (en) * 2006-09-04 2007-02-28 东方锅炉(集团)股份有限公司 Rotational flow pulverized coal burner
CN101424398A (en) * 2008-03-06 2009-05-06 郑平安 Concentrated phase high-temperature oxygen-enriched oilless ignition combustion apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1818476A (en) * 2006-03-24 2006-08-16 王福林 Oxygen-enriched igniting and firing stabilizer without oil
CN1920382A (en) * 2006-09-04 2007-02-28 东方锅炉(集团)股份有限公司 Rotational flow pulverized coal burner
CN101424398A (en) * 2008-03-06 2009-05-06 郑平安 Concentrated phase high-temperature oxygen-enriched oilless ignition combustion apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102401373A (en) * 2010-09-09 2012-04-04 哈尔滨工业大学 Three-volute high temperature oxygen rich pulverized coal ignition device
CN102261649A (en) * 2010-10-22 2011-11-30 魏伯卿 Temperature-gathering type combustion furnace self-preheating oxygen enriched burner with oxygen enriched nozzle
CN102494340A (en) * 2011-12-16 2012-06-13 哈尔滨工业大学 Pulverized coal high-temperature oxygen ignition method and device
CN102620292A (en) * 2012-04-23 2012-08-01 哈尔滨工业大学 High-temperature oxygen-rich igniting flame stabilizer for pulverized coal
CN105202575A (en) * 2015-10-13 2015-12-30 徐州科融环境资源股份有限公司 Ignition method and device through high-temperature high oxygen torch generated by coal powder or crushed coal combustion
CN108085483A (en) * 2017-12-15 2018-05-29 湖南景远微波科技有限公司 A kind of oxygen-enriched microwave igniter of step heat supply

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Open date: 20100811