CN201811226U - Gas and air device of condensation type circulating fluidized-bed boiler - Google Patents
Gas and air device of condensation type circulating fluidized-bed boiler Download PDFInfo
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- CN201811226U CN201811226U CN2010205563683U CN201020556368U CN201811226U CN 201811226 U CN201811226 U CN 201811226U CN 2010205563683 U CN2010205563683 U CN 2010205563683U CN 201020556368 U CN201020556368 U CN 201020556368U CN 201811226 U CN201811226 U CN 201811226U
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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
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Abstract
The utility model relates to a gas and air device of a condensation type circulating fluidized-bed boiler, which comprises a horizontal tubular air preheater, a separable heat pipe exchanger, a primary air cool and hot air channel, a secondary air cool and hot air channel, a fume exhaust channel and a condensate collection device. The separable heat pipe exchanger is arranged on the lower part of the horizontal tubular air preheater in a tail flue, the evaporation section of the separable heat pipe exchanger is arranged in the tail flue, the condensation section of the separable heat pipe exchanger is arranged outside the tail flue, a primary air hot air channel and a secondary air hot air channel are respectively connected with the left side and the right side of the rear part of the condensation section of the separable heat pipe exchanger, the primary air hot air channel and the secondary air hot air channel are respectively connected with the left side and the right side of the outlet of the horizontal tubular air preheater, and the outlet of the primary air hot air channel are respectively communicated with a constant-pressure air chamber at the bottom of a hearth of a boiler and a front coal feeding pipe of the boiler; and the outlet of the secondary air hot air channel is provided with a plurality of branch pipes, and the branch pipes are arranged in two layers and are communicated with a combustion chamber of the hearth. The gas and air device can not only recycle sensible heat and latent heat in fume, but also can enhance the combustion of the boiler and comprehensively improve the efficiency of the boiler.
Description
Technical field
The utility model relates to a kind of boiler cigarette wind apparatus, relates in particular to a kind of CFBB of condensing efficiently cigarette wind apparatus.
Background technology
Boiler is as one of the three big main frames in thermal power plant, and the height of its efficient directly influences the economy of whole unit.The input heat has only about 90% to be used effectively in the boiler actual motion, other heat is a boiler heat loss, bigger two of loss is exhaust gas heat loss's heat loss due to combustibles in refuse of becoming estranged in boiler heat loss, improves air themperature and reduces exhaust gas temperature and can effectively reduce heat loss due to combustibles in refuse and heat loss due to exhaust gas.10～15 ℃ of the general every reductions of exhaust gas temperature, boiler efficiency can improve 1%.
Generating plant pulverized coal boiler generally adopts the wet desulphurization technology, desulfurizer is installed in the back of electric cleaner, as arranging that in the back-end ductwork bottom cold end corrosion easily takes place the smoke evacuation retracting device, as after being arranged in desulfurizer, then, there is not the economic worth that further reclaims because of the cigarette temperature after the desulfurization is reduced to 70～90 ℃.Compare with it, it is wide that CFBB has fuel tolerance, and desulfuration efficiency is up to more than 90% in the burning, and advantage such as sulfur content is low in the smoke evacuation can be avoided the air preheater cold end corrosion substantially.Practice shows that the CFBB exhaust gas temperature is in 130～160 ℃ of scopes, and is suitable substantially with coal-powder boiler, has possessed the condition of further recovery flue gas heat.
Along with the popularization of national clean coal power generation technology, the environment-friendly type CFBB puts into operation successively.Therefore, be necessary to invent a kind of cigarette wind apparatus that improves CFBB efficient in fact, overcome the deficiency of regular circulation fluidized-bed combustion boiler air and gas system, the sensible heat and the latent heat of further recovery boiler smoke evacuation, preheated air, strengthen boiler combustion, reduce exhaust gas heat loss's heat loss due to combustibles in refuse of becoming estranged, improve the economy of CFBB operation comprehensively.
The utility model content
The utility model is intended to the economy of lift circular fluidizing boiler, arrange that in the air and gas system of prior art the condensing heat exchange of heat pipe further reduces exhaust gas temperature, improve first and second wind-warm syndrome, the not only sensible heat of recyclable flue gas and latent heat, also can strengthen boiler combustion, improve boiler efficiency comprehensively.
The technical solution adopted in the utility model is:
A kind of condensing CFBB cigarette wind apparatus, comprise the horizontal pipe air preheater, separate type heat pipe exchanger, the first cooling by wind hot-flow flue, the second wind cooling hot-flow flue, discharge flue, the condensation water gathering-device, described separate type heat pipe exchanger is installed in the horizontal pipe air preheater bottom in the boiler vertical shaft back-end ductwork, its heat transfer element is a carbon steel-water heat pipe, its evaporator section is arranged in the described back-end ductwork, its condensation segment is arranged on the outer side platform of described back-end ductwork, evaporator section and condensation segment adopt two independently casings respectively, and the condensation water gathering-device is installed in the bottom of described back-end ductwork; The some groups of heat pipe tube banks independent of each other that formed by finned tube and upper and lower header assembly welding all are housed in two casings of separate type heat pipe exchanger, corresponding each sheet tube bank is connected with condensate descending by vapor uptake evaporator section with condensation segment, constitutes separately independently closed system; First cooling by wind air channel and second wind cooling air channel are connected to the left and right sides at separate type heat pipe exchanger condensation segment rear portion, wind-heat air channel and secondary wind-heat air channel are connected to the left and right sides of horizontal pipe air preheater outlet, one time the wind-heat ducting outlet is divided into two branch roads, one the tunnel is communicated with the isobaric air compartment of burner hearth bottom, and another road is communicated with the stokehold coal spout; Secondary wind-heat ducting outlet is drawn some arms, divides two-layer top through burner hearth front-back wall, emulsion zone to be communicated with fire box.
This cigarette wind apparatus has adopted the separate type heat pipe exchanger of high efficiente callback smoke discharging residual heat, when low-temperature flue gas passes through the evaporator section of this heat exchanger, after absorbing heat, working medium in the evaporator section tube bank vaporizes, the steam that produces comes together in the upper header on evaporator section top, in vapor uptake is transported to the condensation segment tube bank that cold fluid passes through, the effect of managed outer cold air, outside the latent heat of vaporization that the steam condensation is emitted will be managed one, the preheating of secondary wind, the condensed liquid of steam comes together in the lower collecting box of condensation segment bottom, under the effect of density contrast, get back to continuation evaporation in the evaporator section tube bank by condensate descending.Compared with prior art, this cigarette wind apparatus has following technical characterstic:
(1) condensing heat exchanger in the device adopts separate type heat pipe exchanger, by the heat transmission equipment that the heat pipe tube bank is formed, is the heat exchange of secondary partition, and promptly the heat of low-temperature flue gas will just can pass to cold air by the evaporator section and the condensation segment of heat pipe.Wind and secondary wind are introduced about cold air duct separately is simultaneously by the separate type heat pipe exchanger condensation segment, and the separate type heat pipe exchanger Maintenance and Repair are convenient, the operational reliability height, and when separate type heat pipe exchanger breaks down, but the off-the-line operation.
(2) device has been cancelled the steam air heater of original air and gas system, because the existence of separate type heat pipe exchanger, tubular air preheater inlet import wind-warm syndrome is brought up to more than 50 ℃, thereby improved tube wall temperature, can alleviate cold end corrosion, cancel the steam air heater on the first and second blower fan cold air duct, also can simplify system, save investment.
(3) separate type heat pipe exchanger in the device has reduced exhaust gas temperature, has improved first and second wind-warm syndrome, strengthens boiler combustion, has reduced boiler heat loss.
(4) the utility model has maximally utilised the sensible heat and the latent heat resource of low-grade flue gas, has promoted the economy of CFBB, calculates by low heat valve, and boiler efficiency will be greater than 100%.
Description of drawings
Fig. 1 is a separate type heat pipe exchanger structural representation front view of the present utility model.
Fig. 2 is a separate type heat pipe exchanger structural representation side view of the present utility model.
Fig. 3 is an air and gas system schematic diagram of the present utility model.
Label is expressed as follows in the accompanying drawing: 1. back-end ductwork; 2. horizontal pipe air preheater; 3. vapor uptake; 4. separate type heat pipe exchanger condensation segment; 5. first cooling by wind air channel; 6. second wind cooling air channel; 7. condensate descending; 8. discharge flue; 9. separate type heat pipe exchanger evaporator section; 10. condensation water gathering-device; 11. secondary wind-heat air channel; 12. wind-heat air channel; 13. burner hearth; 14. cyclone separator; 15. loosening air channel; 16. electric bag dust collector; 17. chimney; 18. air-introduced machine; 19. overfire air fan; 20. primary air fan; 21. material returning valve; 22. hp fluid air machine; 23. hp fluid air road; 24. isobaric air compartment; 25. air distribution plate; 26. lime stone inlet; 27. coal-fired inlet; 28. coal spread wind road.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1,2, be provided with horizontal pipe air preheater 2 in the back-end ductwork 1, these horizontal pipe air preheater 2 bottoms are provided with separate type heat pipe exchanger, this separate type heat pipe exchanger evaporator section 9 is arranged in the back-end ductwork 1, this separate type heat pipe exchanger condensation segment 4 is arranged on the back-end ductwork 1 side platform outward, evaporator section and condensation segment adopt two independently casings respectively, all be equipped with some groups by finned tube and last in two casings, the heat pipe tube bank independent of each other that the lower collecting box assembly welding forms, corresponding each sheet tube bank is connected with condensate descending 7 by vapor uptake 3 evaporator section with condensation segment, constitute separately independently closed system, condensation water gathering-device 10 is installed in the bottom of back-end ductwork 1.Low-temperature flue gas from top to bottom in the back-end ductwork 1, laterally skim over the horizontal pipe air preheater 2 and the separate type heat pipe exchanger evaporator section 9 of three flow processs successively, flue-gas temperature is reduced to below 100 ℃, water recovery in the flue gas forms condensate water, collected and discharging by condensation water gathering-device 10, smoke evacuation enters electric bag dust collector 16 through discharge flue 8.First and second cold air that primary air fan 20, overfire air fan 19 blast enters 4 preheatings of separate type heat pipe exchanger condensation segment behind separately first cooling by wind air channel 5, second wind cooling air channel 6, the air channel trend by after forward.Air after the preheating enters horizontal pipe air preheater 2 again, through three be folded to intensification after, enter wind-heat air channel 12, secondary wind-heat air channel 11 respectively.
Referring to Fig. 3, the air and gas system of described boiler adopts balanced draft.A wind after the preheating is divided into two branch roads, and one the tunnel is communicated with the isobaric air compartment of burner hearth bottom, and another road is communicated with stokehold coal spout, through the coal spread wind road sending into burner hearth by the solid particle of lime stone inlet 26 and coal-fired inlet 27.Secondary wind via secondary wind-heat air channel 11 is drawn some arms, divides two-layer warp to be communicated with fire box on the top of burner hearth front-back wall, emulsion zone, and secondary wind is as oil gun igniting combustion supporting wind on the bed and oil gun cooling air simultaneously.After the flue gas that carries solids leaves burner hearth, after 14 separation of two cyclone separators, flue gas enters back-end ductwork 1, flow through successively behind the carbonated drink heating surface, behind horizontal pipe air preheater 2 and condensing heat exchange of heat pipe evaporator section 9, enter electric bag dust collector 16 through discharge flue 8, at last by entering atmosphere behind the air-introduced machine 18 suction chimneys 17.
In Fig. 3 system, flue gas by the horizontal pipe air preheater 2 in the back-end ductwork 1 after, temperature is between 130～160 ℃, continue to enter separate type heat pipe exchanger evaporator section 9 and carry out high efficient heat exchanging, the steam that evaporator section produces is under the density contrast effect of vapor uptake 3 and condensate descending 7, the gasification latent heat of steam is passed to separate type heat pipe exchanger condensation segment 4, the cold wind (environment temperature) that condensation segment is sent primary air fan 20 and overfire air fan 19 here carries out preheating, make 2 imports one of horizontal pipe air preheater, secondary air temperature is brought up to 60～90 ℃, reduce to 70～90 ℃ through the exhaust gas temperature behind the separate type heat pipe exchanger, boiler plant efficiency can be increased to 105%～108%.
Claims (1)
1. condensing CFBB cigarette wind apparatus, comprise the horizontal pipe air preheater, separate type heat pipe exchanger, the first cooling by wind hot-flow flue, the second wind cooling hot-flow flue, discharge flue, the condensation water gathering-device, it is characterized in that, described separate type heat pipe exchanger is installed in the horizontal pipe air preheater bottom in the boiler vertical shaft back-end ductwork, its heat transfer element is a carbon steel-water heat pipe, its evaporator section is arranged in the described back-end ductwork, its condensation segment is arranged on the outer side platform of described back-end ductwork, evaporator section and condensation segment adopt two independently casings respectively, and the condensation water gathering-device is installed in the bottom of described back-end ductwork; The some groups of heat pipe tube banks independent of each other that formed by finned tube and upper and lower header assembly welding all are housed in two casings of separate type heat pipe exchanger, corresponding each sheet tube bank is connected with condensate descending by vapor uptake evaporator section with condensation segment, constitutes separately independently closed system; First cooling by wind air channel and second wind cooling air channel are connected to the left and right sides at separate type heat pipe exchanger condensation segment rear portion, wind-heat air channel and secondary wind-heat air channel are connected to the left and right sides of horizontal pipe air preheater outlet, one time the wind-heat ducting outlet is divided into two branch roads, one the tunnel is communicated with the isobaric air compartment of burner hearth bottom, and another road is communicated with the stokehold coal spout; Secondary wind-heat ducting outlet is drawn some arms, divides two-layer top through burner hearth front-back wall, emulsion zone to be communicated with fire box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205563683U CN201811226U (en) | 2010-09-30 | 2010-09-30 | Gas and air device of condensation type circulating fluidized-bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205563683U CN201811226U (en) | 2010-09-30 | 2010-09-30 | Gas and air device of condensation type circulating fluidized-bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201811226U true CN201811226U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205563683U Expired - Fee Related CN201811226U (en) | 2010-09-30 | 2010-09-30 | Gas and air device of condensation type circulating fluidized-bed boiler |
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| CN (1) | CN201811226U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343200A (en) * | 2011-09-21 | 2012-02-08 | 中国华能集团清洁能源技术研究院有限公司 | Method and system for efficiently controlling mercury pollution of coal-fired power plant at low cost |
| CN105276576A (en) * | 2015-10-20 | 2016-01-27 | 张保森 | Fuel coal desulfurization process |
| CN107388272A (en) * | 2017-08-29 | 2017-11-24 | 力聚热力设备科技有限公司 | A kind of eliminating white smoke device that dries of boiler exhaust gas |
| CN114608312A (en) * | 2022-01-26 | 2022-06-10 | 中钢金冶(内蒙古)工程技术有限公司 | Method for preheating secondary air of rotary kiln by utilizing high-temperature flue gas of submerged arc furnace |
-
2010
- 2010-09-30 CN CN2010205563683U patent/CN201811226U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343200A (en) * | 2011-09-21 | 2012-02-08 | 中国华能集团清洁能源技术研究院有限公司 | Method and system for efficiently controlling mercury pollution of coal-fired power plant at low cost |
| CN105276576A (en) * | 2015-10-20 | 2016-01-27 | 张保森 | Fuel coal desulfurization process |
| CN105276576B (en) * | 2015-10-20 | 2017-11-07 | 张保森 | A kind of coal desulfurization technique |
| CN107388272A (en) * | 2017-08-29 | 2017-11-24 | 力聚热力设备科技有限公司 | A kind of eliminating white smoke device that dries of boiler exhaust gas |
| CN114608312A (en) * | 2022-01-26 | 2022-06-10 | 中钢金冶(内蒙古)工程技术有限公司 | Method for preheating secondary air of rotary kiln by utilizing high-temperature flue gas of submerged arc furnace |
| CN114608312B (en) * | 2022-01-26 | 2023-12-05 | 金冶(内蒙古)工程技术有限公司 | Method for preheating secondary air of rotary kiln by using high-temperature flue gas of submerged arc furnace |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20130930 |