CN101666490B - Burning system for directly burning low-volatilization powder carbocoal by using high-temperature air - Google Patents
Burning system for directly burning low-volatilization powder carbocoal by using high-temperature air Download PDFInfo
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- CN101666490B CN101666490B CN2009100730145A CN200910073014A CN101666490B CN 101666490 B CN101666490 B CN 101666490B CN 2009100730145 A CN2009100730145 A CN 2009100730145A CN 200910073014 A CN200910073014 A CN 200910073014A CN 101666490 B CN101666490 B CN 101666490B
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- 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
Abstract
The invention discloses a burning system for directly burning low-volatilization powder carbocoal by using high-temperature air, relating to a burning system for directly burning low-volatilization powder carbocoal, and solving the problems of low burning efficiency and high pollutant discharge in the prior burning device for the low-volatilization powder carbocoal. A hearth is communicated with a high-temperature air pre-heating device through a high-temperature flue gas channel; two ends of a flue gas residual heat recycling device are communicated with the flue gas flow parts of the high-temperature air pre-heating device and a low-temperature air pre-heater through a low-temperature flue gas channel; an outlet flue of the low-temperature air pre-heater is communicated with a gas mixer through a tail flue gas channel; the gas mixer is communicated with an air flow part of the low-temperature air pre-heater through an inlet air flow channel; the air flow part of the low-temperature air pre-heater is communicated with the high-temperature air pre-heating device through a secondary air flow channel; and the high-temperature air pre-heating device is communicated with a rotary flow burner through a primary air flow channel. The invention has advantages of high burning efficiency and low pollutant discharge rate.
Description
Technical field
The present invention relates to a kind of combustion system that directly uses low volatile powdery semicoke.
Background technology
For obtaining gasification char (flying dust), its grain diameter and pulverized coal particle close (40 μ m～50 μ m), the higher (F of phosphorus content in the particle under a large amount of gasification system secondary ash collectors that adopt in the industry
Ad=30%～40%) the extremely low (V of volatile content,
Daf＜5%) lower (Q of calorific capacity of while fuel,
Net, ar=11MJ/kg～13MJ/kg).Because fine particle has experienced high temperature pyrolysis or the gasification reaction of long period in gasification furnace, do not have in its gasification flying dust residue or only contain a spot of volatile matter, flammable matter combustion reaction activity is lower, need effectively direct burning and waste heat heat recovery technique to make full use of gasification system and discharge gasification char institute heat content, and improve the efficiency of carbon con version of its whole gasification system.Therefore, research can guarantee the stable ignition burning and the final fully process unit of after-flame of so difficult combustion powdered granule, has bigger researching value and application value.
High-temperature air burning is the novel combustion technology that development in recent years is got up, the air that temperature is very high is spurted into burner hearth with fuel, and the method for utilizing adjusting control to sneak into high-temperature flue gas maintains oxygen amount in the combustion air on the reduced levels, can improve burner hearth internal combustion temperature, fire box temperature is more evenly distributed, realize efficient heat transfer, realize the expansion of coke combustion reaction scope, and burning and diabatic process improvement etc., the discharging of high efficiency of carbon con version and low pollutant NOx obtained.So utilize the high-temperature air burning method ultralow volatile matter content (V that burns
Daf＜5%) extremely difficult combustion solid fuel is a very promising technological means.
China is existing to use anthracite, the large, medium and small boiler unit of meager coal in a large number, low volatile carbonaceous particles combustion process has been carried out more research both at home and abroad.The W type flame boiler anthracitic correlation technique of burning has been studied by units such as Xi'an Communications University, Harbin Institute of Technology and Tsing-Hua University, Tsing-Hua University has developed the anthracitic high speed difference jet type binary channels general-purpose coal fines combustion device of burning, and is successfully applied to the very low Fujian of volatile content and adds the anthracitic burning of good fortune.Some researchers of Harbin Institute of Technology adopt thermobalance that the coal dust firing characteristic has been carried out more experimental study, have obtained coal dust, the coal tar combustion characteristics experimental result of unburnable coal.Adopt the horizontal bias pulverized coal combustion that 6 200MW boiler units are transformed in the Henan Jiaozuo Power Plant simultaneously, (V when the anthracite of the burning southeast, Shanxi
Daf=7%～14%, A
Ar=15.86%～31.02%), carbon content of fly ash is reduced to 7.4% by transforming preceding 12.75%, and NOx is reduced to 800mg/m in the smoke evacuation
3(O
2=6%) below.Adopt swing type horizontal bias pulverized coal combustion that 2 300MW boiler units are transformed (V when using meager coal in Earthquake of Anyang station in Henan power plant
Daf=15.85%, A
Ar=25.62%), unburned carbon in flue dust is reduced to 2%～3% by transforming preceding 4%～6%, and under the full-load conditions, NOx is reduced to 600mg/m in the smoke evacuation
3(O
2=6%) below.
As seen, research and development have high burning efficiency, the incorrosive utmost point low volatile content gasification char burner that uses of low pollutant emission not slagging scorification has simultaneously become problem demanding prompt solution, and the research and development of burner have important practical significance and researching value.
Summary of the invention
The objective of the invention is the low efficiency of combustion that exists for the burner that solves existing low volatile powdery semicoke and the problem of high pollution thing discharging, and then a kind of combustion system that adopts high temperature air directly to use low volatile powdery semicoke is provided.
Technical scheme of the present invention is: a kind ofly adopt combustion system that high temperature air directly uses low volatile powdery semicoke by the burner hearth that is covered with wall with refractory lining, refracto, turbulent burner, gas mixer, high-temperature air preheating device, flue gas waste heat recovery apparatus, low-temperature air preheater, to the powder device, gas recirculating fan, the intake air runner, two low-temperature flue gas runners, the hot-air runner, the total runner of one auxiliary air, the high-temperature flue gas runner, the tail flue gas runner, air inlet air channel and combustion air runner are formed; Described turbulent burner is installed on the entrance point outer wall of the burner hearth that is covered with wall with refractory lining, refracto, describedly be connected with turbulent burner to the powder device, the described smoke outlet that is covered with the burner hearth of wall with refractory lining, refracto is communicated with the gas approach of high-temperature air preheating device by the high-temperature flue gas runner, one end of described flue gas waste heat recovery apparatus is communicated with the exhanst gas outlet of high-temperature air preheating device by a low-temperature flue gas runner, the other end of flue gas waste heat recovery apparatus is communicated with the gas approach of low-temperature air preheater by another low-temperature flue gas runner, the exhanst gas outlet of described low-temperature air preheater is communicated with the gas approach of gas mixer by the tail flue gas runner, described gas recirculating fan is installed on the tail flue gas runner, and be communicated with the tail flue gas runner, described air inlet air channel is communicated with the air intlet of gas mixer, the air outlet slit of described gas mixer is communicated with the air intlet of low-temperature air preheater by the intake air runner, the air outlet slit of described low-temperature air preheater is communicated with the air intlet of high-temperature air preheating device by the hot-air runner, the air outlet slit of described high-temperature air preheating device is communicated with turbulent burner by the total runner of an auxiliary air, one end of described combustion air runner is communicated with the total runner of an auxiliary air, and the other end of combustion air runner is communicated with the burner hearth that is covered with wall with refractory lining, refracto.
The present invention compared with prior art has following effect: the present invention utilizes heat characteristic and the secondary wind oxygen content adjustable characteristic of high temperature air to semicoke, make the low volatile semicoke under the furnace high-temperature condition, have good catching fire and steady certainly combustion characteristic, realize difficult combustion semicoke high temperature, evenly burn, have high burning efficiency, reach high coke after-flame degree, the NOx discharge capacity is low simultaneously.
Description of drawings
Fig. 1 is systematic schematic diagram of the present invention (filled arrows among the figure is an airflow direction, and hollow arrow is a flue gas flow direction).
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 present embodiment is described, present embodiment a kind of adopts combustion system that high temperature air directly uses low volatile powdery semicoke by the burner hearth 1 that is covered with wall with refractory lining, refracto, turbulent burner 2, gas mixer 3, high-temperature air preheating device 4, flue gas waste heat recovery apparatus 5, low-temperature air preheater 6, to powder device 7, gas recirculating fan 8, intake air runner 9, two low-temperature flue gas runners 10, hot-air runner 11, the total runner 12 of one auxiliary air, high-temperature flue gas runner 13, tail flue gas runner 14, air inlet air channel 15 and combustion air runner 16 are formed; Described turbulent burner 2 is installed on the entrance point 1-2 outer wall of the burner hearth 1 that is covered with wall with refractory lining, refracto, describedly be connected with turbulent burner 2 to powder device 4, the described smoke outlet 1-1 that is covered with the burner hearth 1 of wall with refractory lining, refracto is communicated with the gas approach 4-1 of high-temperature air preheating device 4 by high-temperature flue gas runner 13, one end of described flue gas waste heat recovery apparatus 5 is communicated with the exhanst gas outlet 4-2 of high-temperature air preheating device 4 by low-temperature flue gas runner 10, the other end of flue gas waste heat recovery apparatus 5 is communicated with the gas approach 6-1 of low-temperature air preheater 6 by low-temperature flue gas runner 10, the exhanst gas outlet 6-2 of described low-temperature air preheater 6 is communicated with the gas approach 3-1 of gas mixer 3 by tail flue gas runner 14, described gas recirculating fan 8 is installed on the tail flue gas runner 14, and be communicated with tail flue gas runner 14, described air inlet air channel 15 is communicated with the air intlet 3-2 of gas mixer 3, the air outlet slit 3-3 of described gas mixer 3 is communicated with the air intlet 6-3 of low-temperature air preheater 6 by intake air runner 9, the air outlet slit 3-3 of described gas mixer 3 is communicated with the air intlet 4-3 of high-temperature air preheating device 4 by hot-air runner 11, the air outlet slit 4-4 of described high-temperature air preheating device 4 is communicated with turbulent burner 2 by the total runner 12 of an auxiliary air, one end of described combustion air runner 16 is communicated with the total runner 12 of an auxiliary air, and the other end of combustion air runner 16 is communicated with the burner hearth 1 that is covered with wall with refractory lining, refracto.Boiler for producing producer: Harbin Boiler Plant, model: 20t/h gasification flying dust incinerator; The Cryogenic air preheating device is the vertical low temperature air preheater of the HG of Nanjing Canuo Energy Equipment Co., Ltd.; Burner is shade type turbulent burner radially; Adopt the GF type Impeller powder feeder of Xinxiang City, Henan Central-South mining equiment Co., Ltd production to the powder device; Gas mixer is the TLY-KH high-temperature flue gas air mixer that Tian Liyuan energy-conservation High Seience Technology Co., Ltd. in Beijing produces; Flue gas waste heat recovery apparatus is the ZRJY-YQ finned tube preheating condensation retracting device of the clean source of Beijing Zhong Run Science and Technology Ltd..
The specific embodiment two: in conjunction with Fig. 1 present embodiment is described, the intake air runner of present embodiment 9, two low-temperature flue gas runners 10, hot-air runner 11, the total runner 12 of an auxiliary air, high-temperature flue gas runner 13, tail flue gas runner 14 and combustion air runners 16 all adopt the high-temperature resistant inner lining runner.So be provided with, guaranteed the air-tightness of high temperature lower flow channel.Other composition is identical with the specific embodiment one with annexation.
The course of work of combustion system of the present invention following (referring to Fig. 1): the high-temperature flue gas of smoke outlet 1-1 that is covered with the burner hearth 1 of wall with refractory lining, refracto directly enters in the high-temperature air preheating device 4 and heated air and smoke mixture heat exchange by high-temperature flue gas runner 13, mist is heated to 600 ℃～800 ℃, part high-temperature gas mixture body is mixed into the burner hearth internal combustion as wind and powdery semicoke, another part high-temperature gas mixture body adopts eddy flow or the direct current mode of spraying into to infeed with secondary wind or after-flame wind form on the burner hearth wall and participates in combustion reaction in the stove, and oxygen content is carried out ratio adjustment control by the gas mixer that is mixed with air and flue gas in the used air that burns.Utilize Fast Heating characteristic and the secondary wind oxygen content adjustable characteristic of high temperature air to semicoke, make the low volatile semicoke under the furnace high-temperature condition, have good catching fire and steady certainly combustion characteristic, realize the high temperature of difficult combustion semicoke, evenly burning, reach high coke after-flame degree, the NOx discharge capacity is low simultaneously.
Claims (2)
1. combustion system that adopts high temperature air directly to use low volatile powdery semicoke, it is by the burner hearth that is covered with wall with refractory lining, refracto (1), turbulent burner (2), gas mixer (3), high-temperature air preheating device (4), flue gas waste heat recovery apparatus (5), low-temperature air preheater (6), to powder device (7), gas recirculating fan (8), intake air runner (9), two low-temperature flue gas runners (10), hot-air runner (11), the total runner of one auxiliary air (12), high-temperature flue gas runner (13), tail flue gas runner (14), air inlet air channel (15) and combustion air runner (16) are formed; It is characterized in that: described turbulent burner (2) is installed on entrance point (1-2) outer wall of the burner hearth (1) that is covered with wall with refractory lining, refracto, describedly be connected with turbulent burner (2) to powder device (7), the described smoke outlet (1-1) that is covered with the burner hearth (1) of wall with refractory lining, refracto is communicated with the gas approach (4-1) of high-temperature air preheating device (4) by high-temperature flue gas runner (13), one end of described flue gas waste heat recovery apparatus (5) is communicated with the exhanst gas outlet (4-2) of high-temperature air preheating device (4) by a low-temperature flue gas runner (10), the other end of flue gas waste heat recovery apparatus (5) is communicated with the gas approach (6-1) of low-temperature air preheater (6) by another low-temperature flue gas runner (10), the exhanst gas outlet (6-2) of described low-temperature air preheater (6) is communicated with the gas approach (3-1) of gas mixer (3) by tail flue gas runner (14), described gas recirculating fan (8) is installed on the tail flue gas runner (14), and be communicated with tail flue gas runner (14), described air inlet air channel (15) is communicated with the air intlet (3-2) of gas mixer (3), the air outlet slit (3-3) of described gas mixer (3) is communicated with the air intlet (6-3) of low-temperature air preheater (6) by intake air runner (9), the air outlet slit (6-4) of described low-temperature air preheater (6) is communicated with the air intlet (4-3) of high-temperature air preheating device (4) by hot-air runner (11), the air outlet slit (4-4) of described high-temperature air preheating device (4) is communicated with turbulent burner (2) by the total runner of an auxiliary air (12), one end of described combustion air runner (16) is communicated with the total runner of an auxiliary air (12), and the other end of combustion air runner (16) is communicated with the burner hearth that is covered with wall with refractory lining, refracto (1).
2. according to the described a kind of combustion system that adopts high temperature air directly to use low volatile powdery semicoke of claim 1, it is characterized in that: described gas mixer (3), high-temperature air preheating device (4), intake air runner (9), two low-temperature flue gas runners (10), hot-air runner (11), the total runner of an auxiliary air (12), high-temperature flue gas runner (13), tail flue gas runner (14) and combustion air runner (16) all adopt the high-temperature resistant inner lining runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100730145A CN101666490B (en) | 2009-09-29 | 2009-09-29 | Burning system for directly burning low-volatilization powder carbocoal by using high-temperature air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100730145A CN101666490B (en) | 2009-09-29 | 2009-09-29 | Burning system for directly burning low-volatilization powder carbocoal by using high-temperature air |
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| CN101666490A CN101666490A (en) | 2010-03-10 |
| CN101666490B true CN101666490B (en) | 2011-02-09 |
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| CN2009100730145A Expired - Fee Related CN101666490B (en) | 2009-09-29 | 2009-09-29 | Burning system for directly burning low-volatilization powder carbocoal by using high-temperature air |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915429B (en) * | 2010-09-16 | 2011-12-07 | 上海理工大学 | Flue gas recirculation technology and combustor combustion air and circulating flue gas premixing device |
| 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 |
| CN105588135A (en) * | 2016-02-22 | 2016-05-18 | 大震锅炉工业（昆山）有限公司 | Smoke recirculator for boiler |
| CN109442392A (en) * | 2018-11-06 | 2019-03-08 | 清华大学 | A kind of gas fired-boiler and its low nitrogen burning method |
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Owner name: HARBIN INDUSTRY UNIVERSITY Owner name: SHANXI JINCHENG ANTHRACITE MINING INDUSTRY GROUP C Free format text: FORMER OWNER: HARBIN INDUSTRY UNIVERSITY Effective date: 20101112 |
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Free format text: CORRECT: ADDRESS; FROM: 150001 NO.92, XIDAZHI STREET, NANGANG DISTRICT, HARBIN CITY, HEILONGJIANG PROVINCE TO: 048006 JINCHENG ANTHRACITE MINING GROUP, BEISHIDIAN TOWN, URBAN AREA, JINCHENG CITY, SHANXI PROVINCE |
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Effective date of registration: 20101112 Address after: 048006, Jincheng Town, Shanxi City, Jincheng Province Coal Mining Group Applicant after: Shanxi Jincheng Anthracite Mining Industry Group Co., Ltd. Co-applicant after: Harbin Institute of Technology Address before: 150001 Harbin, Nangang, West District, large straight street, No. 92 Applicant before: Harbin Institute of Technology |
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