CN101839474B - Method for re-circulating combustion of flue gas of pulverized coal fired boiler - Google Patents

Method for re-circulating combustion of flue gas of pulverized coal fired boiler Download PDF

Info

Publication number
CN101839474B
CN101839474B CN2010102048825A CN201010204882A CN101839474B CN 101839474 B CN101839474 B CN 101839474B CN 2010102048825 A CN2010102048825 A CN 2010102048825A CN 201010204882 A CN201010204882 A CN 201010204882A CN 101839474 B CN101839474 B CN 101839474B
Authority
CN
China
Prior art keywords
flue gas
burner hearth
temperature flue
temperature
circulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010102048825A
Other languages
Chinese (zh)
Other versions
CN101839474A (en
Inventor
邹春
操时英
郭鹏
刘忠成
刘晓东
周旭凯
徐龑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
Original Assignee
Huazhong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN2010102048825A priority Critical patent/CN101839474B/en
Publication of CN101839474A publication Critical patent/CN101839474A/en
Application granted granted Critical
Publication of CN101839474B publication Critical patent/CN101839474B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Combustion Of Fluid Fuel (AREA)

Abstract

The invention provides a method for re-circulating combustion of flue gas of a pulverized coal fired boiler, belongs to a method for circulating combustion of oxygen gas (O2) and carbon dioxide (CO2) of pulverized coal, and aims to solve the problems of low heat efficiency and poor burn-out property existing in the conventional combustion method. The method comprises the steps of: 1,igniting and combusting: conveying the pulverized coal to a furnace hearth by using the circulation flue gas, and simultaneously conveying O2 to the furnace hearth for ignition; 2, circulating the flue gas: dividing the high-temperature flue gas generated by combustion into two parts, and performing cooling, dust removal and desulfurization compression on the first part to obtain liquid CO2; dividing the second part into two paths, conveying the first path to an entrance of the furnace hearth by using a high-temperature circulation fan, and mixing the first path of the flue gas and O2; and performing cooling, dust removal and desulfurization on the second path, and conveying the second path carrying the pulverized coal to the furnace hearth by using a cold circulation fan. The method has the advantages of adjusting the steam temperature of the boiler by using the high-temperature flue gas, enhancing convective heat transfer, increasing the steam temperature of the boiler, improving the heat efficiency of the boiler and the denitration rate, increasing the CO2 content after the high-temperature flue gas is cooled, reducing emission load of NOx, lowering CO2 capturing and collecting cost, and meeting the national energy conservation and environmental protection standard.

Description

A kind of method for re-circulating combustion of flue gas of pulverized coal fired boiler
Technical field
The invention belongs to coal dust O 2And CO 2The circulating combustion method is specifically related to a kind of method for re-circulating combustion of flue gas of pulverized coal fired boiler, is used for power industry CO 2Reduction of discharging and NOx and SOx remove, and improve pulverized-coal fired boiler efficient simultaneously.
Background technology
Coal dust O 2And CO 2The circulating combustion method is a kind of enrichment CO2, reduces carbon emission, also can not only make separated and collected CO to the novel clean combustion technology of pollution that caused by coal burning thing cooperation-removal simultaneously 2, can also reduce the NOx discharging, make things convenient for treatment S O 2Various CO in thermal power plant 2Reduce discharging in the control method, can carry out scale and reduce discharging, Technological Economy is better, and application potential is bigger, obtains the attention of international and domestic research, the research of its technology is also become a big focus of energy industry.Be provided with superheater, reheater, economizer and air preheater successively in the burner hearth rear portion flue of coal-burning boiler, existing coal dust O 2And CO 2The circulating combustion method is applied to coal-burning boiler, comprises ignition step and flue gas recirculation step, the ignition step: utilize cold circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition; The flue gas recirculation step: the flue gas that produces behind the coal dust firing in the burner hearth is after supercooling, dedusting, desulfurization are handled, wherein a part of cooled flue gas is as cold circulating flue gas, cold circulating flue gas is separated into two parts again, and first's cooled flue gas is sent the burner hearth inlet back to by circulating fan; The second portion cooled flue gas is carried coal dust and is sent into burner hearth.Because what adopt is cold flue gas recirculation, from the angle of the thermal efficiency, flue gas is through supercooling, and the temperature that enters burner hearth is low, and the generating efficiency of system is low; Also there are problems such as burnout rate is bad in combustion process.
Summary of the invention
The invention provides a kind of method for re-circulating combustion of flue gas of pulverized coal fired boiler, solve existing coal dust O 2And CO 2The problem that the circulating combustion method thermal efficiency is low, burnout rate is bad.
A kind of method for re-circulating combustion of flue gas of pulverized coal fired boiler of the present invention is applied to pulverized-coal fired boiler, comprises ignition step and flue gas recirculation step successively, is provided with superheater, reheater, economizer and air preheater successively in the burner hearth rear portion flue of pulverized-coal fired boiler; It is characterized in that:
The ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas recompresses into liquid CO after supercooling, dedusting, desulfurization 2The second portion high-temperature flue gas is as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas is sent into the burner hearth inlet by the high temperature circulation blower fan, with O 2Enter burner hearth after the mixing; The second road high-temperature flue gas carries coal dust by cold circulating fan and sends into burner hearth after supercooling, dedusting and desulfurization.
Described method for re-circulating combustion of flue gas of pulverized coal fired boiler is characterized in that:
The volume ratio of first's high-temperature flue gas and second portion high-temperature flue gas is 3: 7～6: 4;
The volume ratio of the described first via high-temperature flue gas and the second road high-temperature flue gas is 6: 4～8: 2;
Described flue gas recirculation step enters the O of burner hearth 2With the volume ratio of second portion high-temperature flue gas be 3: 7～2.8: 7.2.
Described method for re-circulating combustion of flue gas of pulverized coal fired boiler is characterized in that:
In the described flue gas recirculation step, first via high-temperature flue gas is extracted out from the economizer rear portion in the flue of burner hearth rear portion, sends the burner hearth inlet back to by the high temperature circulation blower fan.
The present invention recycles with the economizer rear portion high-temperature flue gas in the burner hearth back-end ductwork and regulates Steam Temperature for Boiler, with O 2/ CO 2Circulating combustion and high-temperature flue gas recycle burning combine, because the rising of furnace outlet gas temperature has strengthened convection heat transfer' heat-transfer by convection, thereby improve Steam Temperature for Boiler.Compare with the tradition burning, boiler thermal output is increased to 98% from 89%; The NOx discharge capacity is reduced to 2500mg/kg coal from 5250mg/kg coal, and the denitration rate has improved 75% than traditional combustion; Simultaneously, improve the cooled CO of first's high-temperature flue gas 2Content makes CO in the flue gas 2Concentration reduces CO up to more than 91% 2Catch and compiling costs; Reach national energy-conserving and environment-protective standard.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention;
The specific embodiment
As shown in Figure 1, the present invention comprises ignition step and flue gas recirculation step successively,
The ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas recompresses into liquid CO after supercooling, dedusting, desulfurization 2The second portion high-temperature flue gas is as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas is sent into the burner hearth inlet by the high temperature circulation blower fan, with O 2Enter burner hearth after the mixing; The second road high-temperature flue gas carries coal dust by cold circulating fan and sends into burner hearth after supercooling, dedusting and desulfurization.
Embodiment 1
The ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas accounts for 30% of whole high-temperature flue gas volumes, after supercooling, dedusting, desulfurization, recompresses into liquid CO 2The second portion high-temperature flue gas accounts for 70% of whole high-temperature flue gas volumes, as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas accounts for 60% of circulating flue gas volume, after extracting out from burner hearth afterbody economizer rear portion, sends into the burner hearth inlet by the high temperature circulation blower fan, with separation of air gained O 2Enter burner hearth after the mixing, mix back O 2Volume accounts for and mixes 30% of back gas volume; The second road high-temperature flue gas accounts for 40% of circulating flue gas volume, successively by cooler and electric cleaner, after supercooling, dedusting and desulfurization, carries coal dust by cold circulating fan and sends into burner hearth.
Embodiment 2
The ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas accounts for 30% of whole high-temperature flue gas volumes, after supercooling, dedusting, desulfurization, recompresses into liquid CO 2The second portion high-temperature flue gas accounts for 70% of whole high-temperature flue gas volumes, as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas accounts for 80% of circulating flue gas volume, after extracting out from burner hearth afterbody economizer rear portion, sends into the burner hearth inlet by the high temperature circulation blower fan, with separation of air gained O 2Enter burner hearth after the mixing, mix back O 2Volume accounts for and mixes 30% of back gas volume; The second road high-temperature flue gas accounts for 20% of circulating flue gas volume, successively by cooler and electric cleaner, after supercooling, dedusting and desulfurization, carries coal dust by cold circulating fan and sends into burner hearth.
Embodiment 3
The ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas accounts for 60% of whole high-temperature flue gas volumes, after supercooling, dedusting, desulfurization, recompresses into liquid CO 2The second portion high-temperature flue gas accounts for 40% of whole high-temperature flue gas volumes, as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas accounts for 60% of circulating flue gas volume, after extracting out from burner hearth afterbody economizer rear portion, sends into the burner hearth inlet by the high temperature circulation blower fan, with separation of air gained O 2Enter burner hearth after the mixing, mix back O 2Volume accounts for and mixes 28% of back gas volume; The second road high-temperature flue gas accounts for 40% of circulating flue gas volume, successively by cooler and electric cleaner, after supercooling, dedusting and desulfurization, carries coal dust by cold circulating fan and sends into burner hearth.
Embodiment 4
The ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, with O that separation of air obtains 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas accounts for 60% of whole high-temperature flue gas volumes, after supercooling, dedusting, desulfurization, recompresses into liquid CO 2The second portion high-temperature flue gas accounts for 40% of whole high-temperature flue gas volumes, as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas accounts for 80% of circulating flue gas volume, after extracting out from burner hearth afterbody economizer rear portion, sends into the burner hearth inlet by the high temperature circulation blower fan, with separation of air gained O 2Enter burner hearth after the mixing, mix back O 2Volume accounts for and mixes 28% of back gas volume; The second road high-temperature flue gas accounts for 20% of circulating flue gas volume, successively by cooler and electric cleaner, after supercooling, dedusting and desulfurization, carries coal dust by cold circulating fan and sends into burner hearth.

Claims (3)

1. a method for re-circulating combustion of flue gas of pulverized coal fired boiler comprises ignition step and flue gas recirculation step successively, is provided with superheater, reheater, economizer and air preheater successively in the burner hearth rear portion flue of pulverized-coal fired boiler; It is characterized in that:
Ignition step: utilize circulating flue gas to the burner hearth pulverized coal conveying, simultaneously, separation of air is obtained 0 2Send into burner hearth, ignition;
The flue gas recirculation step: the high-temperature flue gas that produces behind the coal dust firing in the burner hearth is divided into two parts, and first's high-temperature flue gas recompresses into liquid CO after supercooling, dedusting, desulfurization 2The second portion high-temperature flue gas is as circulating flue gas;
The second portion high-temperature flue gas is further divided into two-way: first via high-temperature flue gas is sent into the burner hearth inlet by the high temperature circulation blower fan, with 0 2Enter burner hearth after the mixing; The second road high-temperature flue gas carries coal dust by cold circulating fan and sends into burner hearth after supercooling, dedusting and desulfurization.
2. method for re-circulating combustion of flue gas of pulverized coal fired boiler as claimed in claim 1 is characterized in that:
The volume ratio of first's high-temperature flue gas and second portion high-temperature flue gas is 3:7～6:4;
The volume ratio of the described first via high-temperature flue gas and the second road high-temperature flue gas is 6:4～8:2;
Described flue gas recirculation step enters 0 of burner hearth 2With the volume ratio of second portion high-temperature flue gas be 3:7～2.8:7.2.
3. method for re-circulating combustion of flue gas of pulverized coal fired boiler as claimed in claim 1 or 2 is characterized in that:
In the described flue gas recirculation step, the first via high-temperature flue gas of second portion high-temperature flue gas is extracted out from the economizer rear portion in the flue of burner hearth rear portion.
?
CN2010102048825A 2010-06-22 2010-06-22 Method for re-circulating combustion of flue gas of pulverized coal fired boiler Expired - Fee Related CN101839474B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102048825A CN101839474B (en) 2010-06-22 2010-06-22 Method for re-circulating combustion of flue gas of pulverized coal fired boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102048825A CN101839474B (en) 2010-06-22 2010-06-22 Method for re-circulating combustion of flue gas of pulverized coal fired boiler

Publications (2)

Publication Number Publication Date
CN101839474A CN101839474A (en) 2010-09-22
CN101839474B true CN101839474B (en) 2011-05-18

Family

ID=42743026

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010102048825A Expired - Fee Related CN101839474B (en) 2010-06-22 2010-06-22 Method for re-circulating combustion of flue gas of pulverized coal fired boiler

Country Status (1)

Country Link
CN (1) CN101839474B (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102252316B (en) * 2011-04-27 2014-07-09 华北电力大学（保定） Pressurized oxygen enriched coal combustion flue gas recycling system
CN102252324B (en) * 2011-05-16 2013-03-27 徐州燃控科技股份有限公司 Method for combusting fuel reburning low-nitrogen oxide
CN102705832B (en) * 2012-05-11 2013-07-10 袁永扬 Solid waste incinerator without emission of flue gas
CN103017151B (en) * 2012-12-11 2015-04-08 上海锅炉厂有限公司 Oxygen-enriched combustion W-shaped flame boiler system and combustion process thereof
CN103104910B (en) * 2013-02-18 2015-09-23 上海锅炉厂有限公司 A kind of micro-oxygen-enriched combusting W flame boiler and CO 2emission-reducing system
RU2652691C2 (en) * 2013-05-20 2018-04-28 Састейнбл Инхансд Энерджи Пти Лтд Method of gas processing
CN104006377A (en) * 2014-03-04 2014-08-27 郭继会 Treatment method for realizing zero release of fuel coal smoke dust in atmosphere
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
CN104406161A (en) * 2014-11-17 2015-03-11 北京联优创展科技有限公司 Coal-fired boiler flue gas backflow and supplement burning device
CN104595893B (en) * 2015-02-13 2018-03-06 黎勃 A kind of multi-faceted burnt wind low nitrogen burning system and method that liquidates
CN105157018A (en) * 2015-10-19 2015-12-16 无锡清杨机械制造有限公司 Iron and steel smelting energy-saving boiler combustion method
CN105588135A (en) * 2016-02-22 2016-05-18 大震锅炉工业（昆山）有限公司 Smoke recirculator for boiler
CN106497609A (en) * 2016-12-13 2017-03-15 中国华能集团清洁能源技术研究院有限公司 Band CO2Gasification furnace coal powder conveying system and method in the IGCC system of trapping
CN106594711A (en) * 2016-12-28 2017-04-26 浙江宜清环境技术有限公司 Low-nitrogen combustion device for chain furnace
CN106861430A (en) * 2017-03-21 2017-06-20 西安西热锅炉环保工程有限公司 A kind of zero-emission urea pyrolysis system and method for setting up high-temperature flue gas heat exchanger
CN107543422A (en) * 2017-10-10 2018-01-05 重庆赛迪热工环保工程技术有限公司 A kind of industrial furnace near-zero release system and method
CN108343951B (en) * 2018-03-30 2023-10-03 烟台龙源电力技术股份有限公司 Pulverized coal combustion equipment and pulverized coal combustion boiler
CN109059012B (en) * 2018-08-16 2023-10-10 天津大学 Ground torch closed combustor exhaust gas denitration system and method
CN111140842A (en) * 2018-11-06 2020-05-12 中国科学院工程热物理研究所 Back-mixing self-preheating combustion boiler system and pulverized coal self-preheating combustion method
CN111023107A (en) * 2019-12-09 2020-04-17 黑龙江省能源环境研究院 Combustion method of low-calorific-value coal gangue
CN112032731A (en) * 2020-08-13 2020-12-04 西安交通大学 Pulverized coal fired boiler system for low-energy consumption coprocessing of fly ash and desulfurized ash
CN118009308B (en) * 2024-04-10 2024-06-21 山西吉祥锅炉制造有限公司 Boiler flue gas recirculation device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07119954A (en) * 1993-10-29 1995-05-12 Mitsui Eng & Shipbuild Co Ltd Apparatus for liquifying carbon dioxide gas in discharged gas from boiler
US5906806A (en) * 1996-10-16 1999-05-25 Clark; Steve L. Reduced emission combustion process with resource conservation and recovery options "ZEROS" zero-emission energy recycling oxidation system
CN2436805Y (en) * 2000-07-31 2001-06-27 黑龙江双锅锅炉股份有限公司 Dust and smoke purifier for boiler
CN100491822C (en) * 2007-03-14 2009-05-27 哈尔滨工业大学 Method of denitration utilizing biomass direct burning and smoke gas recirculating technology
CN101639227B (en) * 2009-08-31 2011-01-05 华北电力大学（保定） High oxygen concentration oxygen-enriched pulverized coal fractional combustion method and device therefor

Also Published As

Publication number Publication date
CN101839474A (en) 2010-09-22

Similar Documents

Publication Publication Date Title
CN101839474B (en) Method for re-circulating combustion of flue gas of pulverized coal fired boiler
CN101761920B (en) Method and device for burning low NOx by utilizing reburning of pulverized coal pyrolysis gas
CN103062745B (en) Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler
CN102200275B (en) Combustion device for dewatering upgradation of lignite and reduction of nitrogen oxide emission and method thereof
CN101839476A (en) Method for micro positive pressure oxygen-enriched combustion of pulverized coal
CN103234198B (en) Microfine coal oxygen-enriched burning process and system
CN101634449A (en) Method for reducing emission of carbon dioxide by circulating fluidized bed temperature flue gas circulation oxygen combustion
CN203571721U (en) Combustion heating system taking biomass as fuel
CN203823745U (en) Oxygen-enriched combustion boiler system
CN107191921B (en) Oxygen-enriched combustion supercritical carbon dioxide cyclone furnace
CN103017151B (en) Oxygen-enriched combustion W-shaped flame boiler system and combustion process thereof
CN103363811A (en) Combustion method of high-temperature oxygen-mixed flue gas
CN101893370A (en) System adopting high concentration CO2 flue gas as coal dust drying medium in boiler
CN105588135A (en) Smoke recirculator for boiler
CN201772440U (en) High-efficiency burning zone burning boiler capable of controlling emission of atmospheric pollutant during burning
CN103574594B (en) Combustion heat supplying system taking living beings as fuel
CN103939158B (en) A kind of low-order coal purification power generation system
CN206112970U (en) Circulating fluidized bed boiler unit based on put out sediment technique futilely
CN104964286A (en) Sludge treatment method capable of reducing discharge of nitrogen oxide in pulverized coal boiler at the same time
CN201531870U (en) Device for carbon dioxide emission reduction through oxygen combustion in circulating fluidized bed based on warm flue gas recirculation
CN102818248A (en) High-chlorine biomass and coal co-utilizing system with low-chlorine-corrosion and low-mercury discharge and method
CN208038322U (en) A kind of lime shaft kiln cooling air cyclic utilization system
CN213334349U (en) Low-temperature flue gas recirculation system for low-nitrogen combustion of pi-shaped boiler under low load
CN111810940B (en) Oxygen-enriched combustion boiler system for lignite multistage drying
CN201407639Y (en) Phase-change furnace for burning pulverized coal

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110518

Termination date: 20140622

EXPY Termination of patent right or utility model