CN102313282B - High-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws - Google Patents
High-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws Download PDFInfo
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- CN102313282B CN102313282B CN 201110060603 CN201110060603A CN102313282B CN 102313282 B CN102313282 B CN 102313282B CN 201110060603 CN201110060603 CN 201110060603 CN 201110060603 A CN201110060603 A CN 201110060603A CN 102313282 B CN102313282 B CN 102313282B
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Abstract
The invention provides a high-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws, which can combust hard straws and soft straws simultaneously and returns materials smoothly. The high-temperature high-pressure recirculating fluidized bed boiler comprises a drum, a hearth, a convection evaporating heating surface, an overheater, a coal economizer, an air preheater and a smoke outlet, wherein the drum is arranged above the hearth, and the convection evaporating heating surface, the overheater, the coal economizer, the air preheater and the smoke outlet are sequentially arranged in the smoke flowing direction of the hearth. The high-temperature high-pressure recirculating fluidized bed boiler is characterized in that a dual-helical feeding machine is externally connected to the lateral side of the bottom of the hearth and leads to a combustion chamber inside the hearth, a deslagging pipe is arranged at the lower part of the combustion chamber, an under-bed ignition device is externally connected to the downside of the combustion chamber, a vertically-arranged circular steam cooling high-temperature cyclone separator is arranged in the middle of a channel through which the hearth is connected with the convection evaporating heating surface, and a returning channel is communicated to the bottom of the vertically-arranged circular steam cold high-temperature cyclone separator, and is communicated with the combustion chamber of the hearth.
Description
Technical field
The present invention relates to the mechanical mechanism technical field of boiler, be specially the Circulating Fluidized Bed Boiler of burning biomass straws.
Background technology
Stalk (Cotton Stalk, tree branches, cornstalk, straw etc.) is the discarded object of agricultural production, lets alone to burn in the field and has not only wasted valuable resource, goes back pollutant atmosphere.Stalk is a kind of biomass fuel, is regenerative resource, takes full advantage of the crop straw burning generating, has energy savings, antipollution social benefit, also has good economic benefit.The CFBB ubiquity returning charge of existing domestic burning biomass straws is smooth, undercapacity and can not take into account simultaneously using of hard stalk and soft stalk.
Summary of the invention
For the problems referred to above, the invention provides the Circulating Fluidized Bed Boiler of burning biomass straws, it is smooth and easy that it can use hard stalk and soft stalk and returning charge simultaneously.
The Circulating Fluidized Bed Boiler of burning biomass straws, its technical scheme is such: it comprises drum, burner hearth, the convection current evaporating heating surface, superheater, economizer, air preheater, exhaust opening, the top of described burner hearth is equipped with described drum, the flue gas flow direction direction of described burner hearth is equipped with described convection current evaporating heating surface successively, superheater, economizer, air preheater, exhaust opening, it is characterized in that: the bottom sidepiece of described burner hearth is circumscribed with double-spiral feeder, described double-spiral feeder leads to the combustion chamber of described burner hearth inside, described combustion chamber lower disposed has residue outlet, below, described combustion chamber is circumscribed with bottom ignition device, the interchannel that described burner hearth connects described evaporating heating surface is equipped with vertically to the cold high temperature cyclone separator of circular vapour of arranging, the bottom of the cold high temperature cyclone separator of described circular vapour is communicated with the returning charge passage, the combustion chamber of the described burner hearth of described returning charge channel connection, the saturated vapor of described drum goes out pipe connects the cold high temperature cyclone separator of described circular vapour by tube connector upper pipeline import, the lower tube way outlet of the cold high temperature cyclone separator of described circular vapour connects the import of described superheater by pipeline, and the steam (vapor) outlet header is led in the outlet of described superheater.
It is further characterized in that: described superheater comprises low temperature superheater, medium temperature overheater, high temperature superheater, described medium temperature overheater, low temperature superheater are arranged in the flue gas flow direction direction of described burner hearth in turn, and described high temperature superheater is arranged in the internal cavities of described returning charge passage;
The lower tube way outlet of the cold high temperature cyclone separator of described circular vapour connects the import of described low temperature superheater by pipeline, the one-level direct-contact desuperheater connects described low temperature superheater and medium temperature overheater, secondary direct-contact desuperheater, tube connector connect described medium temperature overheater, high temperature superheater, and the outlet of described high temperature superheater leads to described steam (vapor) outlet header;
The boiler feed water import connects described economizer, the outlet of described economizer connects the water inlet of described drum by pipeline, the delivery port of described drum connects respectively the water inlet of described convection current evaporating heating surface, burner hearth membrane wall by down-comer, described convection current evaporating heating surface, burner hearth membrane wall delivery port connect described drum by water inlet pipe;
The corresponding pipeline in the below of described convection current evaporating heating surface is the V-structure inwall, and the minimum point of described V-structure inwall is connected with cement output tank in the stove, and the below tube wall of described air preheater has ash discharging hole, and cement output tank leads to described ash discharging hole in the described stove;
Described combustion chamber arranged beneath has a wind apparatus up, and the top of described combustion chamber is furnished with overfire air device.
After adopting structure of the present invention, the hard stalk is or/and soft stalk is delivered to the combustion chamber of burner hearth inside by double-spiral feeder, produce the membrane wall that high-temperature flue gas is passed to heat burner hearth successively after the fuel combustion, the cold high temperature cyclone separator of round vapour, convection current evaporating heating surface etc., wherein produce high-temperature flue gas after the fuel combustion and produce separation at the cold high temperature cyclone separator of round vapour, more tiny particle enters the afterbody convection heating surface with flue gas, larger particle is separated to get off, send into the combustion chamber district of burner hearth by the returning charge passage, it forms circulation, so can use hard stalk and soft stalk simultaneously, and returning charge is smooth and easy.
Description of drawings
Fig. 1 is front view structural representation of the present invention.
The specific embodiment
See Fig. 1, it comprises drum 1, burner hearth 2, convection current evaporating heating surface 3, superheater, economizer 4, air preheater 10, exhaust opening 21, the top of burner hearth 2 is equipped with drum 1, the flue gas flow direction direction of burner hearth 2 is equipped with convection current evaporating heating surface 3, superheater, economizer 4, air preheater 10, exhaust opening 21 successively, superheater comprises low temperature superheater 5, medium temperature overheater 6, high temperature superheater 7, medium temperature overheater 6, low temperature superheater 5 are arranged in the flue gas flow direction direction of burner hearth 2 in turn, and high temperature superheater 7 is arranged in the internal cavities of returning charge passage 12;
The bottom sidepiece of burner hearth 2 is circumscribed with double-spiral feeder 13, double-spiral feeder 13 leads to the combustion chamber 22 of burner hearth 2 inside, combustion chamber 22 lower disposed have residue outlet 15,22 belows, combustion chamber are circumscribed with bottom ignition device 14, the interchannel that burner hearth 2 connects evaporating heating surface 3 is equipped with vertically to the cold high temperature cyclone separator 11 of circular vapour of arranging, the bottom of the cold high temperature cyclone separator 11 of circular vapour is communicated with returning charge passage 12, returning charge passage 12 is communicated with the combustion chamber 22 of burner hearth 2, the saturated vapor of drum 1 goes out pipe connects the cold high temperature cyclone separator 11 of circular vapour by tube connector 23 upper pipeline import 24, the lower tube way outlet 25 of the cold high temperature cyclone separator 11 of circular vapour connects the import of low temperature superheater 5 by pipeline 26, one-level direct-contact desuperheater 8 connects low temperature superheater 5 and medium temperature overheater 6, secondary direct-contact desuperheater 9, tube connector 27 connects medium temperature overheater 6, high temperature superheater 7, the outlet of high temperature superheater 7 leads to steam (vapor) outlet header 16; The boiler feedwater import connects economizer 4, the outlet of economizer 4 connects the water inlet of drum 1 by pipeline 28, the delivery port of drum 1 connects respectively the water inlet of convection current evaporating heating surface 3, burner hearth membrane wall 29 by down-comer 20, convection current evaporating heating surface 3, burner hearth membrane wall 29 delivery port connect drums 1 by water inlet pipe 30; The corresponding pipeline in the below of convection current evaporating heating surface 3 is V-structure inwall 31, and the minimum point of V-structure inwall 31 is connected with cement output tank 17 in the stove, and the below tube wall of air preheater 10 has ash discharging hole 32, and cement output tank 17 leads to ash discharging hole 32 in the stove; Combustion chamber 22 arranged beneath have a wind apparatus 18 up, and the top of combustion chamber 22 is furnished with overfire air device 19.
Its operation principle is as follows:
Boiler feedwater is entered by economizer 4, be subjected to enter drum 1 behind the flue gas, stove water in the drum 1 enters respectively burner hearth membrane wall 29 and convection current evaporating heating surface 3 through down-comer 20, burner hearth membrane wall 29 and convection current evaporating heating surface 3 interior stove water become steam water interface after by flue gas and enter drum 1, by water separator steam water interface is divided into saturated vapor and saturated stove water in drum 1, stove water continues to reflux and enters down-comer 20; Saturated vapor is introduced the cold high temperature cyclone separator 11 of round vapour by tube connector 23, become superheated steam in cold high temperature cyclone separator 11 outlets of round vapour through the saturated vapor that heats and introduce low temperature superheaters 5 by pipeline 26, then enter successively the superheated steam that one-level direct-contact desuperheater 8, medium temperature overheater 6, secondary direct-contact desuperheater 9, high temperature superheater 7 reach the boiler nominal parameter and introduce steam (vapor) outlet header 16 output boilers by tube connector, enter steam turbine work done generating.
Sent into the combustion chamber 21 of burner hearth 2 bottoms by double-spiral feeder 13 through the stalk fuel of fragmentation, produce high-temperature flue gas after the fuel combustion heat is passed to burner hearth membrane wall 29, the cold high temperature cyclone separator 11 of round vapour, convection current evaporating heating surface 3, medium temperature overheater 6, low temperature superheater 5, economizer 4, air preheater 10 successively, flue gas is discharged boiler after the cooling, is discharged by chimney through the flue gas that meets national discharge index after the processing such as dedusting, desulfurization.
The slag of fuel after 21 burnings of the combustion chamber of burner hearth 2 discharged boiler by residue outlet 15.
Produce high-temperature flue gas after the fuel combustion and produce separation at the cold high temperature cyclone separator 11 of round vapour, more tiny particle enters the afterbody convection heating surface with flue gas, larger particle is separated to get off, sent into the combustion chamber 21 of burner hearth 2 by returning charge passage 12, form circulation, in this process, red-hot particle is with the heating surface of heat transferred high temperature superheater 7 and burner hearth membrane wall 29.
Claims (6)
1. the Circulating Fluidized Bed Boiler of burning biomass straws, it comprises drum, burner hearth, the convection current evaporating heating surface, superheater, economizer, air preheater, exhaust opening, the top of described burner hearth is equipped with described drum, the flue gas flow direction direction of described burner hearth is equipped with described convection current evaporating heating surface successively, superheater, economizer, air preheater, exhaust opening, it is characterized in that: the bottom sidepiece of described burner hearth is circumscribed with double-spiral feeder, described double-spiral feeder leads to the combustion chamber of described burner hearth inside, described combustion chamber lower disposed has residue outlet, below, described combustion chamber is circumscribed with bottom ignition device, the interchannel that described burner hearth connects described evaporating heating surface is equipped with vertically to the cold high temperature cyclone separator of circular vapour of arranging, the bottom of the cold high temperature cyclone separator of described circular vapour is communicated with the returning charge passage, the combustion chamber of the described burner hearth of described returning charge channel connection, the saturated vapor of described drum goes out pipe connects the cold high temperature cyclone separator of described circular vapour by tube connector upper pipeline import, the lower tube way outlet of the cold high temperature cyclone separator of described circular vapour connects the import of described superheater by pipeline, and the steam (vapor) outlet header is led in the outlet of described superheater.
2. the Circulating Fluidized Bed Boiler of burning biomass straws according to claim 1, it is characterized in that: described superheater comprises low temperature superheater, medium temperature overheater, high temperature superheater, described medium temperature overheater, low temperature superheater are arranged in the flue gas flow direction direction of described burner hearth in turn, and described high temperature superheater is arranged in the internal cavities of described returning charge passage.
3. the Circulating Fluidized Bed Boiler of burning biomass straws according to claim 2, it is characterized in that: the lower tube way outlet of the cold high temperature cyclone separator of described circular vapour connects the import of described low temperature superheater by pipeline, the one-level direct-contact desuperheater connects described low temperature superheater and medium temperature overheater, secondary direct-contact desuperheater, tube connector connect described medium temperature overheater, high temperature superheater, and the outlet of described high temperature superheater leads to described steam (vapor) outlet header.
4. the Circulating Fluidized Bed Boiler of burning biomass straws according to claim 3, it is characterized in that: the boiler feed water import connects described economizer, the outlet of described economizer connects the water inlet of described drum by pipeline, the delivery port of described drum connects respectively the water inlet of described convection current evaporating heating surface, burner hearth membrane wall by down-comer, described convection current evaporating heating surface, burner hearth membrane wall delivery port connect described drum by water inlet pipe.
5. the Circulating Fluidized Bed Boiler of burning biomass straws according to claim 4, it is characterized in that: the corresponding pipeline in the below of described convection current evaporating heating surface is the V-structure inwall, the minimum point of described V-structure inwall is connected with cement output tank in the stove, the below tube wall of described air preheater has ash discharging hole, and cement output tank leads to described ash discharging hole in the described stove.
6. the Circulating Fluidized Bed Boiler of burning biomass straws according to claim 5, it is characterized in that: described combustion chamber arranged beneath has a wind apparatus up, and the top of described combustion chamber is furnished with overfire air device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110060603 CN102313282B (en) | 2011-03-14 | 2011-03-14 | High-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws |
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| CN 201110060603 CN102313282B (en) | 2011-03-14 | 2011-03-14 | High-temperature high-pressure recirculating fluidized bed boiler of combusting biomass straws |
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| CN102313282A CN102313282A (en) | 2012-01-11 |
| CN102313282B true CN102313282B (en) | 2013-04-24 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721046B (en) * | 2012-07-06 | 2015-01-14 | 无锡华光锅炉股份有限公司 | Circulating fluidized bed boiler for combustion papermaking waste residue and sludge |
| CN102748742A (en) * | 2012-07-31 | 2012-10-24 | 太原锅炉集团有限公司 | Vertical single-drum refuse-incinerating waste heat boiler |
| CN103453521B (en) * | 2013-09-05 | 2017-01-04 | 无锡华光锅炉股份有限公司 | A kind of CFBB of the Petiolus Trachycarpi slag that burns |
| CN107559813A (en) * | 2017-10-18 | 2018-01-09 | 上海工业锅炉无锡有限公司 | A kind of super-pressure reheat vapor cycle fluidized-bed combustion boiler of burning-used biologic mass fuel |
| CN110220182B (en) * | 2019-07-10 | 2024-04-19 | 哈尔滨红光锅炉总厂有限责任公司 | Biomass direct-fired energy-saving circulating fluidized bed high-temperature ultrahigh-pressure reheat steam boiler |
| CN111623334B (en) * | 2020-06-24 | 2024-06-14 | 北京天清源工程技术有限公司 | Corner tube type biomass fuel boiler |
| CN111720810B (en) * | 2020-06-24 | 2021-05-11 | 南通万达锅炉有限公司 | Fluidized bed incinerator grading cooling module |
| CN112325279A (en) * | 2020-10-10 | 2021-02-05 | 大唐长山热电厂 | Reforming equipment for biomass combustion of circulating fluidized bed coal-fired boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201225613Y (en) * | 2008-06-23 | 2009-04-22 | 中国华电工程(集团)有限公司 | Circulating fluid bed boiler of stalk biomass for combustion |
| CN201973708U (en) * | 2011-03-14 | 2011-09-14 | 无锡华光锅炉股份有限公司 | High-temperature high-pressure circulating fluidized bed boiler burning biomass straws |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003241606A1 (en) * | 2002-05-22 | 2003-12-12 | Manufacturing And Technology Conversion International, Inc. | Pulse gasification and hot gas cleanup apparatus and process |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201225613Y (en) * | 2008-06-23 | 2009-04-22 | 中国华电工程(集团)有限公司 | Circulating fluid bed boiler of stalk biomass for combustion |
| CN201973708U (en) * | 2011-03-14 | 2011-09-14 | 无锡华光锅炉股份有限公司 | High-temperature high-pressure circulating fluidized bed boiler burning biomass straws |
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Address after: 214028 No. 3 Chengnan Road, new Wu District, Jiangsu, Wuxi Patentee after: Wuxi Huaguang Environmental Protection Energy Group Co., Ltd Address before: 214028 No. 3 Chengnan Road, New District, Jiangsu, Wuxi Patentee before: WUXI HUAGUANG BOILER Co.,Ltd. |