CN2711540Y - Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler - Google Patents
Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN2711540Y CN2711540Y CN 200420016351 CN200420016351U CN2711540Y CN 2711540 Y CN2711540 Y CN 2711540Y CN 200420016351 CN200420016351 CN 200420016351 CN 200420016351 U CN200420016351 U CN 200420016351U CN 2711540 Y CN2711540 Y CN 2711540Y
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- air
- cyclone separator
- heater
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- boiler body
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Abstract
A low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler device of the utility model comprises a boiler body and a barrel which is arranged in the front of the boiler body. The utility model is characterized in that a tail air flue is connected with a cyclone separator, and the cyclone separator is connected with the boiler body; the upper part of the boiler body is provided with a one-level evaporation tube, an overheating two-level evaporation tube and a high temperature coal economizer; the intermediate section of the boiler body is a dilute phase zone, and a second air port and a third air port are arranged in the dilute phase zone; the bottom of the boiler body is a concentrated phase zone, and a wind chamber is arranged at the bottom of the concentrated phase zone to be connected with a first air port; an air distributing device is arranged on the wind chamber; the bottom of the cyclone separator is connected with a helix dust collector; the upper part of the interior of the tail air flue is provided with a low temperature coal economizer, while the lower part is provided with an air heater; the inner wall of the hearth is lined with a layer of fire resistance material, and the interior of the upper boiler body is provided with a wear resistance plate. The utility model has the advantages of good environmental protection performance, high steam quality, sensitive regulation and reliable and safe operation.
Description
Technical field
The utility model relates to a kind of CFBB, particularly relates to warm separating cycle fluidized-bed combustion boiler in the low cigarette speed of a kind of low circulating ratio, belongs to thermal powerplant.
Background technology
General higher about about 40 times of present CFBB circulating ratio, flue gas flow rate is generally 6～8 meter per seconds, and the cyclone inlet flue-gas temperature generally is controlled at about 850 ℃.The ubiquitous shortcoming of this boiler is that efficiency of combustion is supported, serious wear, continous-stable running time is short, coking may appear in the circulating ash system, the boiler adjusting function is poor, start-up time is long etc.Wherein efficiency of combustion is supported, serious wear is the most scabrous two hang-ups of CFBB, also is the factor that influences the boiler performance most critical.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and warm separating cycle fluidized-bed combustion boiler in the low cigarette of low circulating ratio of a kind of efficiency of combustion height, little, the dependable performance of wearing and tearing, energy-conserving and environment-protective is provided.
The technical scheme that realizes the foregoing invention purpose is: comprise boiler furnace, place the drum of body of heater front portion, its structural feature is, back-end ductwork is communicated with cyclone separator, cyclone separator is communicated with body of heater, the top of described body of heater is provided with one-level evaporation tube, superheater dual evaporation pipe and high-temperature economizer, the middle part of body of heater is a dilute-phase zone, overfiren air port, tertiary air orifice are positioned at dilute-phase zone, the bottom of body of heater is a concentrated phase area, the bottom that air compartment is positioned at concentrated phase area is communicated with a wind inlet, and air-distribution device is positioned on the air compartment; The bottom of described cyclone separator is connected with the spiral soot blower; Described back-end ductwork internal upper part is equipped with low-level (stack-gas) economizer, and air preheater is equipped with in the bottom; The inboard wall of burner hearth lining posts refractory masses, is provided with wear strip in the top body of heater of burner hearth.
Owing to adopted technique scheme, section of burner hearth of the present utility model and furnace height can guarantee the residence time of fuel in burner hearth, reduce fluidizing velocity, reduce flue gas band ash ability, make fuel after-flame in stove less than the critical particle separation diameter of separator.
The separative efficiency of cyclone separator is not less than 98.5%, the separative efficiency height, because temperature is separated in adopting, the whole circulation ash system is safe and reliable, the possibility of no coking.Because the cigarette temperature is low, cyclone separator is little with the few thermal inertia of flame-proof thermal insulation material, and start-up time is short, and blowing out is rapid.
The temperature height of dilute-phase zone can be accelerated burning velocity.Air distribution is reasonable, is provided with two at the middle part of burner hearth, tertiary air fully mixes fuel and oxygen, by above measure, can make full combustion of fuel, improves efficiency of combustion.Owing to adopt the air zoning mode, NOx, CO discharge very lowly, and recirculating fluidized bed adopts low temperature combustion mode can carry out desulfuration in furnace, and SOx discharges very low, and the boiler good environmental protection reaches national requirements for environmental protection fully.
Adopt the dual evaporation pipe, the warm water injection flow rate reduces, and improves steam quality, regulates sensitivity, and superheat steam temperature control is more safe and reliable.
Adopt dull and stereotyped abrasionproof form, the whole lining refractories of burner hearth, boiler heating surface does not have wearing and tearing.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the barrel structure schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing in detail the utility model is described in detail
The utility model is by drum 23, furnace wall cooling, air compartment 10 and enter the mouth 9, one-level evaporation tube 15, superheater 16, dual evaporation pipe 17, high-temperature economizer 18 compositions such as grade.All by hanging on the crossbeam that is hung in steelframe, furnace wall cooling can freely expand downwards these parts.Referring to Fig. 1, the utility model is divided into body of heater, cyclone separator 1, back-end ductwork and 23 4 parts of drum, and the suitable for reading and cyclone separator 1 of back-end ductwork is communicated with, and cyclone separator 1 is communicated with the upper end of body of heater.The bottom of body of heater is a concentrated phase area 11, and the bottom that air compartment 10 is positioned at concentrated phase area 11 is communicated with a wind inlet 9, and air-distribution device 8 is positioned at concentrated phase area 11 on the air compartment.Concentrated phase area 11 1 sides are communicated with coal feeding hole 5, coal feeding hole 5 is connected with loop back device 6, loop back device 6 is connected with the bottom of cyclone separator 1, loop back device 6, cyclone separator 1 are supported on that its bottom is connected with spiral soot blower 21 on the steelframe of body of heater, and spiral soot blower 21 is connected driving with frequency control motor 22.Roots blower 7 under the loop back device 6 provides stablizes back grey blast, air quantity, by to spiral soot blower 21 VFC of whirlwind with the bottom, with the ash amount of how much controlling back of ash disposal amount what, can guarantee that boiler returns that ash is smooth and easy, control is simple and reliable.The middle part of body of heater is a dilute-phase zone 14, and overfiren air port 12, tertiary air orifice 13 are positioned at dilute-phase zone 14.The top of body of heater is provided with one-level evaporation tube 15, superheater 16, dual evaporation pipe 17 and high-temperature economizer 18 according to the order of sequence.As Fig. 1, the back-end ductwork internal upper part is equipped with low-level (stack-gas) economizer 2, and the air preheater 3 that four groups of upper and lower settings are installed is equipped with in the bottom, and exhanst gas outlet 4 is arranged at the bottom.In order to reduce the wearing and tearing of heating surface, inboard wall of burner hearth all serves as a contrast and pastes one deck refractory brick liner 20, constitutes flame retardant coating.Install wear strip 19 additional on the water-cooling wall before and after the top of burner hearth.This set can prevent the wearing and tearing of heating surface elbow and water-cooling wall effectively, improves the boiler continuous operating time, guarantees that boiler does not have wearing and tearing at an overhaul after date.
The course of work of the present utility model: air and gas system flow process: by the hot-air after air preheater 3 heating, the air compartment 10 that a part (about 50%) is introduced lower furnace portion makes wind evenly enter concentrated phase area 11 in the stove through air-distribution device 8, make recycle stock fluidisation and the interior fuel combustion of help adding stove in the stove, another part wind divides two parts.Send at the burner hearth middle part; secondary wind 12 accounts for 30%; tertiary air 13 accounts for 20%; two; tertiary air has strengthened disturbance in the stove; strengthen fuel and Air mixing; improve efficiency of combustion; air zoning reduces the growing amount of Nox in the stove; after the fuel combustion; after heat part is absorbed by furnace wall cooling, enter stove internal upper part one-level evaporation tube 15 after making the flue-gas temperature that generates after the fuel combustion reduce to as shown in fig. 1 about 950 ℃～1050 ℃, high-temperature flue gas is successively by each heating surface in the stove: one-level evaporation tube 15; superheater 16; dual evaporation pipe 17, temperature is reduced to about 450 ℃ (upper ends in the stove) after the high-temperature economizer 18, enters cyclone separator 1 then; behind cyclone separator 1, the bulky grain ash that separates has coal feed point 5 to enter circulating combustion in the stove through loop back device 6 and coal together.Clean flue gas after the separation enters back-end ductwork makes cigarette temperature drop to about about 140 ℃ discharge boiler bodies enter deduster through low-level (stack-gas) economizer 2 and air preheater 3.The boiler circuit flow process: feedwater is introduced into low-level (stack-gas) economizer 2, the heating back is by entering high-temperature economizer 18 communicating pipe, enter the drum 23 of body of heater shown in Figure 2 front portion again, enter furnace wall cooling next part case and one through down-comer, the inlet collection case of dual evaporation pipe, through water-cooling wall and one, dual evaporation heating surface of tubes heating back is introduced drum 23 by fairlead with steam water interface, after the separation of the cyclone separator in the drum 23, enter down-comer behind the water that separates and participate in circulation once more, saturated vapor is introduced and is caused steam turbine power generation or hot user after superheater is heated to nominal parameter.
Claims (4)
1, warm separating cycle fluidized-bed combustion boiler in the low cigarette speed of a kind of low circulating ratio, comprise boiler furnace, place the drum of body of heater front portion, it is characterized in that, back-end ductwork is communicated with cyclone separator, cyclone separator is communicated with body of heater, the top of described body of heater is provided with one-level evaporation tube, superheater dual evaporation pipe and high-temperature economizer, the middle part of body of heater is a dilute-phase zone, overfiren air port, tertiary air orifice are positioned at dilute-phase zone, the bottom of body of heater is a concentrated phase area, the bottom that air compartment is positioned at concentrated phase area is communicated with a wind inlet, and air-distribution device is positioned on the air compartment; The bottom of described cyclone separator is connected with the spiral soot blower; Described back-end ductwork internal upper part is equipped with low-level (stack-gas) economizer, and air preheater is equipped with in the bottom; The inboard wall of burner hearth lining posts refractory masses, is provided with wear strip in the top body of heater of burner hearth.
2, warm separating cycle fluidized-bed combustion boiler in the low cigarette speed of low circulating ratio according to claim 1, it is characterized in that, described concentrated phase area is communicated with coal feeding hole, coal feeding hole is connected with loop back device, loop back device is connected with the bottom of cyclone separator, and loop back device, cyclone separator are supported on the steelframe of body of heater.
3, warm separating cycle fluidized-bed combustion boiler in the low cigarette speed of low circulating ratio according to claim 1 is characterized in that, four groups of air preheaters are housed in the described back-end ductwork, four groups of preheater upper and lower settings, and the lower end of back-end ductwork is provided with exhanst gas outlet.
4, warm separating cycle fluidized-bed combustion boiler in the low cigarette speed of low circulating ratio according to claim 1 is characterized in that cyclone separator is connected with the upper end of body of heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420016351 CN2711540Y (en) | 2004-06-12 | 2004-06-12 | Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420016351 CN2711540Y (en) | 2004-06-12 | 2004-06-12 | Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711540Y true CN2711540Y (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420016351 Expired - Lifetime CN2711540Y (en) | 2004-06-12 | 2004-06-12 | Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler |
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| Country | Link |
|---|---|
| CN (1) | CN2711540Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943395A (en) * | 2010-09-26 | 2011-01-12 | 安徽金鼎锅炉股份有限公司 | Circulating fluidized bed boiler |
| CN101986025A (en) * | 2010-10-25 | 2011-03-16 | 广东慧生能源技术有限公司 | Integrated low-carbon micro-discharge energy-saving and emission-reduction boiler system |
| CN102777895A (en) * | 2012-07-24 | 2012-11-14 | 武汉和信益科技有限公司 | Semi-tower type medium-temperature separation biomass circulating fluidized bed boiler |
| WO2013020254A1 (en) * | 2011-08-10 | 2013-02-14 | 山东圣威新能源有限公司 | Environmentally friendly energy-saving boiler of circulating fluidized bed type with organic thermal carrier |
| CN105782959A (en) * | 2016-05-12 | 2016-07-20 | 中国神华能源股份有限公司 | Circulating fluidized bed boiler |
| CN107763593A (en) * | 2017-11-21 | 2018-03-06 | 贵州新能源开发投资股份有限公司 | A kind of high sodium coal two-stage medium temperature separation recirculating fluidized bed superheated steam boiler of pure combustion |
| CN109340743A (en) * | 2018-09-29 | 2019-02-15 | 上海晓清环保科技有限公司 | A kind of duff grain circulating fluidized bed boiler |
| CN109746130A (en) * | 2019-03-23 | 2019-05-14 | 湖北华电襄阳发电有限公司 | Gasification of biomass recirculating fluidized bed whirlwind separator |
-
2004
- 2004-06-12 CN CN 200420016351 patent/CN2711540Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943395A (en) * | 2010-09-26 | 2011-01-12 | 安徽金鼎锅炉股份有限公司 | Circulating fluidized bed boiler |
| CN101986025A (en) * | 2010-10-25 | 2011-03-16 | 广东慧生能源技术有限公司 | Integrated low-carbon micro-discharge energy-saving and emission-reduction boiler system |
| WO2013020254A1 (en) * | 2011-08-10 | 2013-02-14 | 山东圣威新能源有限公司 | Environmentally friendly energy-saving boiler of circulating fluidized bed type with organic thermal carrier |
| CN102777895A (en) * | 2012-07-24 | 2012-11-14 | 武汉和信益科技有限公司 | Semi-tower type medium-temperature separation biomass circulating fluidized bed boiler |
| CN102777895B (en) * | 2012-07-24 | 2015-03-04 | 武汉和信益科技有限公司 | Semi-tower type medium-temperature separation biomass circulating fluidized bed boiler |
| CN105782959A (en) * | 2016-05-12 | 2016-07-20 | 中国神华能源股份有限公司 | Circulating fluidized bed boiler |
| CN107763593A (en) * | 2017-11-21 | 2018-03-06 | 贵州新能源开发投资股份有限公司 | A kind of high sodium coal two-stage medium temperature separation recirculating fluidized bed superheated steam boiler of pure combustion |
| CN109340743A (en) * | 2018-09-29 | 2019-02-15 | 上海晓清环保科技有限公司 | A kind of duff grain circulating fluidized bed boiler |
| CN109746130A (en) * | 2019-03-23 | 2019-05-14 | 湖北华电襄阳发电有限公司 | Gasification of biomass recirculating fluidized bed whirlwind separator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140612 Granted publication date: 20050720 |