CN103697466A - Circulating fluidized bed boiler with smoke recirculating bypass, and NOX discharging method - Google Patents
Circulating fluidized bed boiler with smoke recirculating bypass, and NOX discharging method Download PDFInfo
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- CN103697466A CN103697466A CN201310708857.4A CN201310708857A CN103697466A CN 103697466 A CN103697466 A CN 103697466A CN 201310708857 A CN201310708857 A CN 201310708857A CN 103697466 A CN103697466 A CN 103697466A
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Abstract
The invention discloses a circulating fluidized bed boiler with a smoke recirculating bypass, and an NOX discharging method. By the adoption of the combustion mode, the conventional fluidized bed boiler is high in NOX emission and the NOX emission cannot meet a national environment-friendly requirement through combustion adjustment; a denitration agent is required to be consumed for the running of a conventional generally-adopted SNCR (selective non-catalytic reduction) or an conventional SCR (semiconductor control rectifier) post-combustion denitration technology, so that the running cost is high; furthermore, a denitration agent is a chemical engineering product and has a high requirement on power plant fire fighting, so that a potential safety hazard is caused. The circulating fluidized bed boiler comprises an in-boiler combustion system (1), wherein the in-boiler combustion system is connected with a tail flue (2); the tail flue is connected with a dust remover (3); the dust remover is connected with a draught fan; the draught fan is connected with a chimney (5) through a draught fan outlet flue (6); the draught fan outlet flue (6) is connected with a recirculating fan (7); the recirculating fan is connected with the in-boiler combustion system. The circulating fluidized bed boiler is used for reducing the NOX emission.
Description
technical field:
the present invention relates to a kind of CFBB with flue gas recirculation bypass and NO
x
discharge method.
background technology:
existing fluidized-bed combustion boiler combustion system NO
x
discharge highlyer, cannot reach national requirements for environmental protection by burning adjustment.And denitration technology after the SNCR generally adopting at present or SCR burning, its operation needs to consume denitrfying agent, and operating cost is higher, and denitrfying agent is chemical products, and fire-fighting is had relatively high expectations, and has potential safety hazard.Meanwhile, the escaping of ammonia can cause secondary pollution.
summary of the invention:
the object of this invention is to provide a kind of CFBB with flue gas recirculation bypass and NO
x
discharge method.
above-mentioned object realizes by following technical scheme:
a kind of CFBB with flue gas recirculation bypass, its composition comprises: Boiler Furnace combustion system, described Boiler Furnace combustion system is connected with back-end ductwork, described back-end ductwork is connected with deduster, described deduster is connected with air-introduced machine, described air-introduced machine is connected by air-introduced machine exhaust pass with chimney, and described air-introduced machine exhaust pass is connected with recirculation blower, and described recirculation blower is connected with described Boiler Furnace combustion system.
the described CFBB with flue gas recirculation bypass, described Boiler Furnace combustion system comprises burner hearth, separator, described burner hearth bottom is air compartment, on described air compartment top, air distribution plate is installed, described air compartment is connected by recirculating gas duct with described recirculation blower, in described back-end ductwork, be provided with air preheater, primary air fan is connected by described air preheater with described air compartment, and overfire air fan is connected by described air preheater with described burner hearth.
a kind of NO of the CFBB with flue gas recirculation bypass
x
discharge method, the low-temperature flue gas of discharging from air-introduced machine outlet extension boiler, after recirculation blower supercharging, delivers in burner hearth bottom air compartment, flue gas recycled and a wind mix in air compartment, after mixing, by air distribution plate, enter burner hearth for the fluidisation of bed material in stove; In the situation that guaranteeing that fluidisation is constant by wind total amount, adding of low-temperature flue gas, reduces the primary air flow for fluidisation, thereby increases Secondary Air ratio, and Secondary Air classification combustion characteristics is enhanced, and by strengthening fractional combustion, has reduced the NO that boiler produces
x
; Meanwhile, adding of low-temperature flue gas also makes exhaust gas volumn increase, and reduces ignition temperature, reaches best ignition temperature, and improved temperature field in furnace, makes temperature field more even, is conducive to reduce boiler NO
x
discharge.
beneficial effect:
1. the present invention utilizes flue gas recirculating technique, by burning, adjusts, and can realize and in burning, reduce NO
x
produce, do not use any denitrfying agent, operating cost is low, there is no secondary pollution.
2. the present invention is that fluidized-bed combustion boiler reduces NO
x
liao Xin road is opened up in discharge, with respect to denitration after burning, has reduced the operating cost of fluidized-bed combustion boiler, has larger economic benefit.
3. the present invention utilizes recirculation blower to draw the low-temperature flue gas of a part of boiler export, after supercharging, delivers in boiler furnace and participates in burning in stove, improves stove inner air-distributing and distributes, and improves temperature field in furnace, suitably reduces ignition temperature, thereby reach, reduces boiler NO
x
the object of discharge.
accompanying drawing explanation:
accompanying drawing 1 is the structural representation of the CFBB with flue gas recirculation bypass of the present invention.
the specific embodiment:
embodiment 1:
a kind of CFBB with flue gas recirculation bypass, its composition comprises: Boiler Furnace combustion system 1, described Boiler Furnace combustion system is connected with back-end ductwork 2, described back-end ductwork is connected with deduster 3, described deduster is connected with air-introduced machine 4, described air-introduced machine is connected by air-introduced machine exhaust pass 6 with chimney 5, and described air-introduced machine exhaust pass is connected with recirculation blower 7, and described recirculation blower is connected with described Boiler Furnace combustion system.
embodiment 2:
according to the CFBB with flue gas recirculation bypass described in embodiment 1, described Boiler Furnace combustion system comprises burner hearth 8, separator 9, described burner hearth bottom is air compartment 10, on described air compartment top, air distribution plate 11 is installed, described air compartment is connected by recirculating gas duct 12 with described recirculation blower, in described back-end ductwork, be provided with air preheater 13, primary air fan 14 is connected by described air preheater with described air compartment, and overfire air fan 15 is connected by described air preheater with described burner hearth.
embodiment 3:
the NO of the above-mentioned CFBB with flue gas recirculation bypass
x
discharge method, the low-temperature flue gas of discharging from air-introduced machine outlet extension boiler, after recirculation blower supercharging, delivers in burner hearth bottom air compartment, flue gas recycled and a wind mix in air compartment, after mixing, by air distribution plate, enter burner hearth for the fluidisation of bed material in stove; In the situation that guaranteeing that fluidisation is constant by wind total amount, adding of low-temperature flue gas, reduces the primary air flow for fluidisation, thereby increases Secondary Air ratio, and Secondary Air classification combustion characteristics is enhanced, and by strengthening fractional combustion, has reduced the NO that boiler produces
x
; Meanwhile, adding of low-temperature flue gas also makes exhaust gas volumn increase, and reduces ignition temperature, reaches best ignition temperature, and improved temperature field in furnace, makes temperature field more even, is conducive to reduce boiler NO
x
discharge.
Claims (3)
1. the CFBB with flue gas recirculation bypass, its composition comprises: Boiler Furnace combustion system, it is characterized in that: described Boiler Furnace combustion system is connected with back-end ductwork, described back-end ductwork is connected with deduster, described deduster is connected with air-introduced machine, described air-introduced machine is connected by air-introduced machine exhaust pass with chimney, and described air-introduced machine exhaust pass is connected with recirculation blower, and described recirculation blower is connected with described Boiler Furnace combustion system.
2. according to the CFBB with flue gas recirculation bypass described in claim 1, it is characterized in that: described Boiler Furnace combustion system comprises burner hearth, separator, described burner hearth bottom is air compartment, on described air compartment top, air distribution plate is installed, described air compartment is connected by recirculating gas duct with described recirculation blower, in described back-end ductwork, be provided with air preheater, primary air fan is connected by described air preheater with described air compartment, and overfire air fan is connected by described air preheater with described burner hearth.
3. the NO of the CFBB with flue gas recirculation bypass described in a claim 1 or 2
xdischarge method, it is characterized in that: the low-temperature flue gas of discharging from air-introduced machine outlet extension boiler, after recirculation blower supercharging, deliver in burner hearth bottom air compartment, flue gas recycled and a wind mix in air compartment, after mixing, by air distribution plate, enter burner hearth for the fluidisation of bed material in stove; In the situation that guaranteeing that fluidisation is constant by wind total amount, adding of low-temperature flue gas, reduces the primary air flow for fluidisation, thereby increases Secondary Air ratio, and Secondary Air classification combustion characteristics is enhanced, and by strengthening fractional combustion, has reduced the NO that boiler produces
x; Meanwhile, adding of low-temperature flue gas also makes exhaust gas volumn increase, and reduces ignition temperature, reaches best ignition temperature, and improved temperature field in furnace, makes temperature field more even, is conducive to reduce boiler NO
xdischarge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310708857.4A CN103697466A (en) | 2013-12-20 | 2013-12-20 | Circulating fluidized bed boiler with smoke recirculating bypass, and NOX discharging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310708857.4A CN103697466A (en) | 2013-12-20 | 2013-12-20 | Circulating fluidized bed boiler with smoke recirculating bypass, and NOX discharging method |
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| CN103697466A true CN103697466A (en) | 2014-04-02 |
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| CN201310708857.4A Pending CN103697466A (en) | 2013-12-20 | 2013-12-20 | Circulating fluidized bed boiler with smoke recirculating bypass, and NOX discharging method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105597539A (en) * | 2016-03-25 | 2016-05-25 | 上海益格新技术工程有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system of hot confluence main pipe |
| CN105642101A (en) * | 2016-01-27 | 2016-06-08 | 西安航天源动力工程有限公司 | Flue gas recirculation and SNCR joint denitration process system |
| CN106178870A (en) * | 2015-05-07 | 2016-12-07 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR combines flue gas denitrification system |
| CN106642091A (en) * | 2016-12-18 | 2017-05-10 | 北京国能中电节能环保技术股份有限公司 | Low-nitrogen combustion method of fluidized-bed boiler |
| CN109737413A (en) * | 2019-01-09 | 2019-05-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of high-efficiency low-pollution fire grate garbage boiler and flue gas purification system |
| CN112325282A (en) * | 2020-10-29 | 2021-02-05 | 中国石油化工集团有限公司 | Circulating fluidized bed flue gas and fly ash combined circulating system and control method |
| WO2021034637A1 (en) * | 2019-08-22 | 2021-02-25 | General Electric Company | Hybrid boiler-dryer and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934282A (en) * | 1988-02-18 | 1990-06-19 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Circulating type fluidized bed combustion apparatus |
| CN1103479A (en) * | 1993-07-06 | 1995-06-07 | 福斯特·惠勒能源公司 | Fluidized bed steam generation system and method of using recycled flue gases to assist in passing loopseal solids |
| CN101592336A (en) * | 2009-07-06 | 2009-12-02 | 宁波怡诺能源科技有限公司 | A kind of fluidized-bed combustion boiler |
| CN102341650A (en) * | 2009-03-06 | 2012-02-01 | 美卓动力有限公司 | Method for reducing nitrogen oxide emissions in oxyfuel combustion |
| CN202868674U (en) * | 2012-10-15 | 2013-04-10 | 黄震 | High-efficiency low-energy-consumption smoke denitration device of circulating fluidized bed boiler |
| CN203615327U (en) * | 2013-12-20 | 2014-05-28 | 哈尔滨锅炉厂有限责任公司 | Circulating fluidized bed boiler with flue gas recirculation bypass |
-
2013
- 2013-12-20 CN CN201310708857.4A patent/CN103697466A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934282A (en) * | 1988-02-18 | 1990-06-19 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Circulating type fluidized bed combustion apparatus |
| CN1103479A (en) * | 1993-07-06 | 1995-06-07 | 福斯特·惠勒能源公司 | Fluidized bed steam generation system and method of using recycled flue gases to assist in passing loopseal solids |
| CN102341650A (en) * | 2009-03-06 | 2012-02-01 | 美卓动力有限公司 | Method for reducing nitrogen oxide emissions in oxyfuel combustion |
| CN101592336A (en) * | 2009-07-06 | 2009-12-02 | 宁波怡诺能源科技有限公司 | A kind of fluidized-bed combustion boiler |
| CN202868674U (en) * | 2012-10-15 | 2013-04-10 | 黄震 | High-efficiency low-energy-consumption smoke denitration device of circulating fluidized bed boiler |
| CN203615327U (en) * | 2013-12-20 | 2014-05-28 | 哈尔滨锅炉厂有限责任公司 | Circulating fluidized bed boiler with flue gas recirculation bypass |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178870A (en) * | 2015-05-07 | 2016-12-07 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR combines flue gas denitrification system |
| CN106178870B (en) * | 2015-05-07 | 2019-01-08 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR joint flue gas denitrification system |
| CN105642101A (en) * | 2016-01-27 | 2016-06-08 | 西安航天源动力工程有限公司 | Flue gas recirculation and SNCR joint denitration process system |
| CN105597539A (en) * | 2016-03-25 | 2016-05-25 | 上海益格新技术工程有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system of hot confluence main pipe |
| CN106642091A (en) * | 2016-12-18 | 2017-05-10 | 北京国能中电节能环保技术股份有限公司 | Low-nitrogen combustion method of fluidized-bed boiler |
| CN109737413A (en) * | 2019-01-09 | 2019-05-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of high-efficiency low-pollution fire grate garbage boiler and flue gas purification system |
| WO2021034637A1 (en) * | 2019-08-22 | 2021-02-25 | General Electric Company | Hybrid boiler-dryer and method |
| TWI837404B (en) * | 2019-08-22 | 2024-04-01 | 瑞士商通用電氣技術公司 | A method for reducing the emission of contaminants by a furnace, a furnace and a non-transitory computer readable medium |
| CN112325282A (en) * | 2020-10-29 | 2021-02-05 | 中国石油化工集团有限公司 | Circulating fluidized bed flue gas and fly ash combined circulating system and control method |
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Application publication date: 20140402 |