CN202835339U - Rotary air pre-heater wind sealing device of circulating fluidized bed boiler - Google Patents
Rotary air pre-heater wind sealing device of circulating fluidized bed boiler Download PDFInfo
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- CN202835339U CN202835339U CN2012204248498U CN201220424849U CN202835339U CN 202835339 U CN202835339 U CN 202835339U CN 2012204248498 U CN2012204248498 U CN 2012204248498U CN 201220424849 U CN201220424849 U CN 201220424849U CN 202835339 U CN202835339 U CN 202835339U
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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
A rotary air pre-heater wind sealing device of a circulating fluidized bed boiler is characterized in that a primary air channel is connected with an air groove through a primary air port, the air groove is arranged on a flat-shaped board and provided with an air groove mouth, steel bars are made into clapboards at equal intervals in the air groove mouth, a plurality of round pipes are vertically arranged on a side, close to axial seal, of the flat-shaped board, a plurality of round pipes are arranged on a side, close to the flat-shaped board, of the axial seal, high temperature and high pressure primary air from the primary air channel passes through the primary air port, the air groove and the air groove mouth in sequence to be erupted, and a wind and air film sealing body is formed between the flat-shaped board and the axial seal through through-holes formed in walls of the round pipes. Due to adoption of fluid control, the rotary air pre-heater wind sealing device of the circulating fluidized bed boiler is simple, easy, capable of enabling reliability and controllability of a sealing system to be improved, easy to run and operate, and little in maintenance.
Description
Technical field
The utility model relates to a kind of seal construction, specifically a kind of CFBB rotary regenerative air heater wind sealing device.
Background technology
CFB CFBB rotary regenerative air heater air leak rate of air curtain is to weigh a principal economic indicators of its performance driving economy.General CFBB rotary regenerative air heater design is the air preheater in four minutes storehouses, air side pressure high (general 8 ~ 12Kpa) because of air preheater, and fume side be the high negative pressure district (general-4 ~-5Kpa), air preheater design air leak rate of air curtain is generally 6.5, statistics China 300MW Circulating Fluidized Bed Boilers air preheater air leakage rate is high, after the operation, air leak rate of air curtain is not quite similar according to each electricity power enterprise's operation and management level, and scope is 6.0～20.0%.Air preheater air leakage directly affects boiler unit performance driving economy.
Although present employed foreign technology sealing means is different, its core reduces air leak rate of air curtain with mechanism's sealing " blocking up ".And equipment is when normally moving, and its dynamic and static seal clearance not only changes with the variation of boiler load, but also to Variable Factors such as active forces complicated variation occurs with pressure reduction, the temperature difference, fluid-phase.Therefore, simple sealing machine structure, its sealing effectiveness must be poor.Complicated mechanical motion mechanism is difficult to guarantee again reliability and the motility of mechanism.The rotary air preheater air leak rate of air curtain is down to the Sealing Technology that goes to zero, and has become the in the world common engineering research problem of being concerned about.
Summary of the invention
For addressing the above problem, the utility model provides a kind of boiler rotary regenerative air heater wind sealing device; Under the prerequisite that does not affect original sealing device, install, guarantee under any duty that air leak rate of air curtain is minimum, practical reliable, long working life and repair and maintenance are easy, in addition, because fluid control is simple, sealing system reliability, controllability are strengthened, operation is easy, maintenance is few and do not shut down also and can safeguard, change, and can remove intrinsic the carrying of air preheater and leak out, and can make air leak rate of air curtain less than 0.5%; The wind Sealing Technology is exactly fully to sum up on the Sealing Technology basis, technology according to the wind sealing air, set up high blast district in air preheater inside to reach sealing effectiveness, this will make the equipment air leak rate of air curtain be reduced to zero in theory, trouble boiler cigarette for many years, the bottleneck problem of wind system " short circuit " with thorough solution.
For achieving the above object, the utility model adopts following scheme:
A kind of CFBB rotary regenerative air heater wind sealing device, comprise wind air channel, air duct joint, wind groove, wind groove notch, flat plate, axial seal member, it is characterized in that: wind air channel is connected with wind groove on being contained in the flat plate by wind interface, wind groove notch is housed on the wind groove, in the wind groove notch every making dividing plate with equidistant with steel bar; Rely on some pipes of axial seal one side at right angle setting at the flat plate, rely on flat plate side in axial seal simultaneously some pipes are installed, wind of HTHP from a wind air channel, successively through air duct joint, wind groove and the ejection of wind groove notch, by the film seal that between flat plate and axial seal, becomes a common practice of the through hole on the described pipe wall.
The width that described wind groove notch relies on axial seal one side is 1200mm, and the width that is connected in wind groove place is 4640mm.
The beneficial effects of the utility model:
Description of drawings:
Fig. 1 is that CFB CFBB rotary regenerative air heater wind hermetically-sealed construction is always schemed.
Fig. 2 is CFB CFBB rotary regenerative air heater wind sealed structure chart.
Among the figure: 1, wind air channel, 2, air duct joints, 3, the wind groove, 4, wind groove notch, 5, the flat plate, 6, axial seal.
The specific embodiment:
A kind of CFBB rotary regenerative air heater wind sealing device, comprise that a wind exports air duct joint, wind groove, wind groove notch, flat plate, axial seal member, draw wind of HTHP with pipeline from a wind outlet of air preheater air channel, one time wind direction air preheater both sides cause place, flat plate centre position; Install a wind groove 3 with iron plate additional at air preheater flat plate place, the wind groove has wind groove notch 4, in the wind groove notch every making the reinforcement dividing plate with equidistant steel bar with respective thickness; Be installed on the flat plate with 4 pipes, 2 pipes are installed in axial seal place in the middle of the flat plate, pipeline on 4 flat plates and the pipeline of 2 axial seals are opened the hole, wind groove notch height is not higher than the plane of flat plate, can be lower than the flat plate, a wind forms the gas film sealing body by 4 ejections of wind groove notch between flat plate 5 and axial seal 6.
Embodiment 1
Shown in Fig. 1-2: adopt the pipeline of Φ 375*6 to draw from a wind air channel of air preheater (1), cause flat plate (5) position to the air preheater both sides, adopt 5mm iron plate to locate to install additional wind groove (3) at flat plate (5), wind groove notch (4) width from inside to outside size Control at 1200mm and 4640mm, highly be 100 mm, make the reinforcement dividing plate every 300 mm with corresponding thickness steel bar in the wind groove notch (4).Adopt the pipe of long 6500 mm of 4 ф 219*6 to be installed on the flat plate (5), adopt the pipe of 2 long 2700mm of ф 159*5 to be installed in the middle axial seal (6) of flat plate (5), slot at 4 ф 219*6 and 2 ф 159*5 pipelines, weld mutually with the wind groove notch (4) of making, and be fixed on the flat plate (5).Wind groove notch (4) highly is not higher than the plane of flat plate (5), can be less than about the flat plate.
Shown in Fig. 1-2: the blanket gas of CFB boiler rotary regenerative air heater wind Sealing Technology adopts wind of CFB boiler air preheater high pressure.Blanket gas is taken from a wind of HTHP in a wind air channel (1), wind of HTHP with flow velocity greater than 40m/s, advance along an air channel (1), spray from wind groove notch (4) through an air duct joint (2) and wind groove (3) successively, the film seal that between flat plate (5) and axial seal (6), becomes a common practice, thus reach sealing effectiveness.
Claims (2)
1. CFBB rotary regenerative air heater wind sealing device, comprise a wind air channel (1), an air duct joint (2), wind groove (3), wind groove notch (4), flat plate (5), axial seal (6) member, it is characterized in that: a wind air channel (1) is connected with wind groove (3) on being contained in flat plate (5) by a wind interface (2), wind groove notch (4) is housed on the wind groove (3), in the wind groove notch (4) every making dividing plate with equidistant with steel bar; Rely on some pipes of axial seal (6) one side at right angle settings at flat plate (5), rely on flat plate (5) side in axial seal (6) simultaneously some pipes are installed, wind of HTHP from a wind air channel (1), successively through an air duct joint (2), wind groove (3) and wind groove notch (4) ejection, by the film seal that between flat plate (5) and axial seal (6), becomes a common practice of the through hole on the above-mentioned pipe wall.
2. CFBB rotary regenerative air heater wind sealing device according to claim 1 is characterized in that the width that described wind groove notch (4) relies on axial seal (6) one sides is 1200mm, and being connected in the width that wind groove (3) locates is 4640mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204248498U CN202835339U (en) | 2012-08-24 | 2012-08-24 | Rotary air pre-heater wind sealing device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204248498U CN202835339U (en) | 2012-08-24 | 2012-08-24 | Rotary air pre-heater wind sealing device of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202835339U true CN202835339U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204248498U Expired - Fee Related CN202835339U (en) | 2012-08-24 | 2012-08-24 | Rotary air pre-heater wind sealing device of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN202835339U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206720A (en) * | 2013-04-10 | 2013-07-17 | 哈尔滨锅炉厂预热器有限责任公司 | Positive pressure sealing method and positive pressure sealing system for rotary air preheater |
| CN106524817A (en) * | 2016-10-27 | 2017-03-22 | 盛春 | Compressed air sealing system and rotary air preheater comprising same |
| CN106678849A (en) * | 2017-03-01 | 2017-05-17 | 华电郑州机械设计研究院有限公司 | Gas-film-type core for on-line plugging of power plant boiler flue and plugging method of gas-film-type core |
-
2012
- 2012-08-24 CN CN2012204248498U patent/CN202835339U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206720A (en) * | 2013-04-10 | 2013-07-17 | 哈尔滨锅炉厂预热器有限责任公司 | Positive pressure sealing method and positive pressure sealing system for rotary air preheater |
| CN106524817A (en) * | 2016-10-27 | 2017-03-22 | 盛春 | Compressed air sealing system and rotary air preheater comprising same |
| CN106678849A (en) * | 2017-03-01 | 2017-05-17 | 华电郑州机械设计研究院有限公司 | Gas-film-type core for on-line plugging of power plant boiler flue and plugging method of gas-film-type core |
| CN106678849B (en) * | 2017-03-01 | 2019-01-29 | 郑州科源耐磨防腐工程有限公司 | A kind of boiler of power plant flue blocks air film type core and its method for blocking online |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20140824 |
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| EXPY | Termination of patent right or utility model |