CN111623661A - Air preheater sealing capable of actively controlling mushroom-shaped deformation without deformation - Google Patents
Air preheater sealing capable of actively controlling mushroom-shaped deformation without deformation Download PDFInfo
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- CN111623661A CN111623661A CN201910146098.4A CN201910146098A CN111623661A CN 111623661 A CN111623661 A CN 111623661A CN 201910146098 A CN201910146098 A CN 201910146098A CN 111623661 A CN111623661 A CN 111623661A
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- Prior art keywords
- hot
- cold end
- plates
- air preheater
- plate
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
- F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
- F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2225/00—Reinforcing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements
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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
Abstract
The invention discloses an active control mushroom-shaped deformation non-deformation seal of an air preheater, and relates to the technical field of air preheaters, in particular to an active control mushroom-shaped deformation non-deformation seal of an air preheater. This air preheater active control mushroom is out of shape and is not warp sealed, through being equipped with hot cold end movable seal plate between sector plate and the rotor compartment baffle, make hot cold end movable seal plate strengthen the holding power of rotor compartment baffle eave, let the rotor compartment baffle be for a long time under the high temperature mushroom-shaped deformation littleer, effectively prevented to take place the friction between sector plate and the hot cold end movable seal plate, the fluctuation range that makes the equipment long-time operation air leakage rate is littleer, the leakproofness of air preheater has effectively been promoted.
Description
Technical Field
The invention relates to the technical field of air preheaters, in particular to an air preheater with mushroom-shaped deformation actively controlled and non-deformation sealing.
Background
The air preheater is a device for heating air required by fuel combustion by utilizing the heat of the flue gas at the tail part of a boiler, can further reduce the temperature of the flue gas, improve the efficiency of the boiler, improve the ignition and combustion conditions of the fuel, reduce the heat loss of incomplete combustion, improve the temperature of a hearth, strengthen the radiation heat exchange in the boiler, and reduce the number of heating surfaces of a water-cooled wall in the boiler under a certain evaporation amount, thereby saving metal materials, reducing the manufacturing cost of the boiler, reducing the temperature of the flue gas, improving the working condition of an induced draft fan and reducing the power consumption of the induced draft fan.
The common type of air pre-heaters in the market is a rotary air pre-heater (also called a volume-gram type air pre-heater), under a hot-state operation state, all parts of the air pre-heater expand due to heating, due to the fact that temperature differences exist at different parts of the air pre-heater, mushroom-shaped deformation occurs to a rotor, gaps among the rotor, a sector plate, an axial sealing plate and the like can also change, if the gaps are too large, the air leakage rate of the air pre-heater is high, and if the gaps are too small, the air pre-heater can be blocked.
The air leakage problem of the rotary air preheater is an inherent problem, the air leakage rate can be reduced gradually through the improvement of a sealing means, the air leakage mainly comprises the factors of radial cold and hot end air leakage, carrying air leakage, bypass air leakage, axial air leakage, central cylinder air leakage and the like, the air leakage is generally from one side with high pressure to one side with low pressure, and the direct air leakage is a main factor causing the air leakage.
At present, the air leakage rate of an air preheater and the heat exchange efficiency of the air preheater are one of main energy-saving indexes of each air preheater using unit, and various sealing technologies are continuously tried by various household air preheater sealing manufacturers, so that more or less problems exist, such as complex structure, short service life, unreliable performance and the like, but the most basic problems are not overcome, namely the air preheater is passively adapted to the mushroom deformation of an air preheater rotor, and the mushroom deformation of the air preheater rotor cannot be actively controlled, so that the long-term stable low air leakage rate of the air preheater cannot be really achieved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an air preheater which actively controls mushroom-shaped deformation and does not deform, and solves the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: the air preheater comprises a hot and cold end radial sealing sheet, a hot and cold end movable sealing plate, a hot and cold end fixing plate, a hot and cold end adjusting plate and a hot and cold end movable sealing sheet, wherein the hot and cold end fixing plate is respectively installed at the end part of a rotor bin partition plate, one side of the hot and cold end adjusting plate is provided with the hot and cold end adjusting plate, the hot and cold end adjusting plate is installed at the end part of one side of the rotor bin partition plate close to the hot and cold end fixing plate, the hot and cold end movable sealing plate is installed at the end part of the hot and cold end adjusting plate, one side of the hot and cold end movable sealing plate is fixed with the end part of the other side of the rotor bin partition plate through the hot and cold end movable sealing sheet, and the hot and cold end radial sealing sheet is installed at one side of the inner.
Preferably, the relative distance between the hot and cold end adjusting plate and the central shaft is determined, the air pre-heaters with different types and operation parameters and the required sealing gap are needed, the position of the hot and cold end adjusting plate is adjusted as required, a cantilever beam structure with a fixed end or a multi-point support is formed, the sealing requirements of the air pre-heaters with different types and operation parameters are met, and the sealing gap between the radial sealing plate and the sector plate under different working conditions is controlled within a reasonable controllable range.
Preferably, the fixing modes of the hot-cold end movable sealing plate, the hot-cold end fixing plate and the hot-cold end adjusting plate can flexibly select a semi-welding type, a triangular plate type, a flat plate type and the like to fix according to the air preheater site construction conditions of different types and operation parameters, so that a required cantilever beam structure with a fixed end or a multi-point support is formed.
Preferably, a radial sealing gap is reserved between the hot-cold-end radial sealing sheet and the sector plate, and a bin partition plate gap is reserved between the hot-cold-end movable sealing plate and the rotor bin partition plate.
Preferably, the hot end and the cold end are radially sealed, and the hot end and the cold end can be independently applied and the two ends are jointly applied according to actual conditions.
The invention provides an air preheater which actively controls mushroom-shaped deformation and does not deform, and has the following beneficial effects:
1. this air preheater active control mushroom is out of shape and is not warp sealed, through being equipped with hot cold end movable seal plate between sector plate and the rotor compartment baffle, make hot cold end movable seal plate strengthen the holding power of rotor compartment baffle eave, let the rotor compartment baffle be for a long time under the high temperature mushroom-shaped deformation littleer, effectively prevented to take place the friction between sector plate and the hot cold end movable seal plate, the fluctuation range that makes the equipment long-time operation air leakage rate is littleer, the leakproofness of air preheater has effectively been promoted.
2. This air preheater active control mushroom warp indeformable and seal, reserve between radial gasket and the sector plate through hot cold end and have radial seal clearance, reserve between hot cold end movable sealing plate and the rotor compartment baffle and have storehouse baffle clearance, reserved the space for hot cold end radial gasket and hot cold end movable sealing plate thermal expansion, and hot cold end radial gasket and hot cold end movable sealing plate all can demolish, can change when making the air preheater operation cause hot cold end radial gasket and hot cold end movable sealing plate to age, the convenience and the life of maintenance have effectively been improved.
Drawings
FIG. 1 is a structural state diagram of an actively controlled air preheater in a cold state with mushroom-shaped deformation and no deformation;
FIG. 2 is a structural state diagram of an actively controlled air preheater in a hot state with mushroom-shaped deformation and no deformation;
FIG. 3 is a schematic diagram of the change of the outer clearance of the sealing cold and hot state without deforming due to mushroom-shaped deformation of the active control air preheater;
FIG. 4 is a schematic view showing the position of the cold and hot end adjusting plates (5, 5') controlled by deformation relative to the side of the central axis;
FIG. 5 is a schematic view showing the position of the cold/hot end adjustment plates (5, 5') relative to the outer edge side for controlling deformation;
FIG. 6 is a schematic view of triangular-plate-shaped cold-hot-end fixing plates (4, 4 ') and cold-hot-end adjusting plates (5, 5');
FIG. 7 is a schematic view of a single-plate or double-plate type cold-hot end fixing plate (4, 4 ') and a cold-hot end adjusting plate (5, 5');
fig. 8 is a schematic view of a semi-or fully-welded cold-hot end fixing plate (4, 4 ') and a cold-hot end adjusting plate (5, 5').
In the figure: 1. a radial sealing gap (1, 1'); 2. a hot and cold end radial sealing fin (2, 2'); 3. hot and cold end movable sealing plates (3, 3'); 4. hot and cold end fixing plates (4, 4'); 5. a hot and cold end adjusting plate (5, 5'); 6. and the hot and cold end movable plate sealing plates (6, 6').
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 8, the present invention provides a technical solution: in order to achieve the purpose, the invention is realized by the following technical scheme: an active control mushroom-shaped deformation non-deformation seal of an air preheater comprises hot cold end radial sealing plates (2, 2 '), hot cold end movable sealing plates (3, 3'), hot cold end fixing plates (4, 4 '), hot cold end adjusting plates (5, 5') and hot cold end movable sealing plates (6, 6 '), wherein the hot cold end fixing plates (4, 4') are respectively arranged at the end parts of rotor bin partition plates, one sides of the hot cold end fixing plates (4, 4 ') are provided with the hot cold end adjusting plates (5, 5'), the hot cold end adjusting plates (5, 5 ') are arranged at the end parts of one sides of the rotor bin partition plates close to the hot cold end fixing plates (4, 4'), the ends of the hot cold end fixing plates (4, 4 ') and the hot cold end adjusting plates (5, 5') are provided with the hot cold end movable sealing plates (3, 3 '), and one sides of the hot cold end movable sealing plates (3, 3') pass through the hot cold end movable sealing plates (6), 6 ') is fixed with the end part of the other side of the rotor bin partition plate, one side of the hot and cold end movable sealing plates (3, 3') close to the inner wall of the sector plate is provided with hot and cold end radial sealing plates (2, 2 '), the relative distance between the hot and cold end adjusting plates (5, 5') and the central shaft is determined, the air pre-heaters with different types and operation parameters and the required sealing gaps are required, the positions of the hot and cold end adjusting plates (5, 5 ') are adjusted according to the requirements to form a cantilever beam structure with fixed end heads or multi-point support to adapt to the sealing requirements of the air pre-heaters with different types and operation parameters, the sealing gaps of the radial sealing plates and the sector plate under different working conditions are controlled within a reasonable controllable range, and the hot and cold end movable sealing plates (3, 3'), the hot and cold end fixing plates (4, 4 '), and the hot and cold end adjusting plates (5, 5') can be fixed, the semi-welding type, the triangular plate type, the flat plate type and the like are flexibly selected to be fixed to form a cantilever beam structure with a fixed end or a multi-point support, the hot-cold end movable sealing plates (3, 3 ') are connected with the hot-cold end movable sealing plates (6, 6 ') in an inserting mode, a reserved gap between each hot-cold end movable sealing plate (3, 3 ') and each hot-cold end movable sealing plate (6, 6 ') can be adjusted in deformation of a rotor bin partition plate, a radial sealing gap (1, 1 ') is reserved between each hot-cold end radial sealing plate (2, 2 ') and a sector plate, a bin partition plate gap (7, 7 ') is reserved between each hot-cold end movable sealing plate (3, 3 ') and the rotor bin partition plate, the bin partition plate gap (7, 7 ') is larger than the maximum variable of the rotor bin partition plate when the rotor bin partition plate is deformed in a mushroom shape, and the hot-cold end radial, 2') the partition board of the rotor chamber is subjected to mushroom-shaped deformation and scraped by the sector plate, the radial seal of the hot end and the cold end can be used, and the hot end and the cold end can be independently applied and the two ends can be jointly applied according to actual conditions.
In conclusion, when the air preheater is used, firstly, the hot-cold end fixing plates (4, 4 '), the hot-cold end adjusting plates (5, 5') and the hot-cold end movable plate sealing pieces (6, 6 ') are sequentially arranged at the end parts of the rotor bin partition plates, secondly, the hot-cold end movable sealing plates (3, 3') are fixed through the hot-cold end fixing plates (4, 4 '), the hot-cold end adjusting plates (5, 5') and the hot-cold end movable plate sealing pieces (6, 6 '), then, the hot-cold end radial sealing pieces (2, 2') are fixed at the end parts of the hot-cold end movable sealing plates (3, 3 '), when the air preheater operates, the rotor bin partition plates deform to support the hot-cold end movable sealing plates (3, 3'), so that the gaps between the hot-cold end radial sealing pieces (2, 2 ') and the hot-cold end movable sealing pieces (6, 6') are reduced, and the deformation of the rotor bin partition plate is reduced.
Description of the drawings: the upper sector plate in the attached drawing is a hot end sector plate, and the lower sector plate in the attached drawing is a cold end sector plate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides an active control mushroom is described and is warp sealed not, including hot cold end radial gasket (2, 2 '), hot cold end movable seal board (3, 3 '), hot cold end fixed plate (4, 4 '), hot cold end regulating plate (5, 5 ') and hot cold end fly leaf gasket (6, 6 '), its characterized in that: the hot cold end fixing plates (4, 4 ') are respectively installed at the end parts of the rotor bin partition plates, one sides of the hot cold end fixing plates (4, 4 ') are provided with hot cold end adjusting plates (5, 5 '), the hot cold end adjusting plates (5, 5 ') are installed at the end parts of one sides of the rotor bin partition plates close to the hot cold end fixing plates (4, 4 '), hot cold end movable sealing plates (3, 3 ') are installed at the end parts of the hot cold end fixing plates (4, 4 ') and the hot cold end adjusting plates (5, 5 '), one sides of the hot cold end movable sealing plates (3, 3 ') are fixed with the end part of the other side of the rotor bin partition plates through hot cold end movable sealing plates (6, 6 '), and one sides of the hot cold end movable sealing plates (3, 3 ') close to the inner walls of the sector plates are provided with hot cold end radial sealing.
2. An air preheater as claimed in claim 1, wherein said air preheater is an actively controlled mushroom-type shape non-deformable seal, wherein: the relative distance between the hot and cold end adjusting plates (5, 5 ') and the central shaft is determined, the air pre-heaters with different types and operation parameters and the required sealing gap are needed, the positions of the hot and cold end adjusting plates (5, 5') are adjusted as needed to form a cantilever beam structure with fixed ends or multi-point support, so that the sealing requirements of the air pre-heaters with different types and operation parameters are met, and the sealing gap between the radial sealing plate and the sector plate under different working conditions is controlled within a reasonable controllable range.
3. An air preheater as claimed in claim 1, wherein said air preheater is an actively controlled mushroom-type shape non-deformable seal, wherein: the fixing modes of the hot-cold end movable sealing plates (3 and 3 '), the hot-cold end fixing plates (4 and 4 ') and the hot-cold end adjusting plates (5 and 5 ') can flexibly select a semi-welding type, a triangular plate type, a flat plate type and the like to fix according to the air preheater site construction conditions of different types and operation parameters, and a required cantilever beam structure with fixed end or multi-point support is formed.
4. An air preheater as claimed in claim 1, wherein said air preheater is an actively controlled mushroom-type shape non-deformable seal, wherein: radial sealing gaps (1, 1 ') are reserved between the radial sealing sheets (2, 2') of the hot and cold ends and the sector plates, and bin partition plate gaps (7, 7 ') are reserved between the movable sealing plates (3, 3') of the hot and cold ends and the rotor bin partition plates.
5. An air preheater as claimed in claim 1, wherein said air preheater is an actively controlled mushroom-type shape non-deformable seal, wherein: the hot side and cold side radial seals can be used, and can be applied separately at the hot side and the cold side and applied jointly at the two ends according to actual conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910146098.4A CN111623661B (en) | 2019-02-27 | 2019-02-27 | Air preheater sealing capable of actively controlling mushroom-shaped deformation without deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910146098.4A CN111623661B (en) | 2019-02-27 | 2019-02-27 | Air preheater sealing capable of actively controlling mushroom-shaped deformation without deformation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111623661A true CN111623661A (en) | 2020-09-04 |
| CN111623661B CN111623661B (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910146098.4A Active CN111623661B (en) | 2019-02-27 | 2019-02-27 | Air preheater sealing capable of actively controlling mushroom-shaped deformation without deformation |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100937107B1 (en) * | 2009-09-24 | 2010-01-15 | 김창우 | Gas preheating apparatus |
| CN201992681U (en) * | 2011-03-02 | 2011-09-28 | 张玉伟 | Radial segmented sealing device for rotary air preheater |
| CN202328340U (en) * | 2011-12-13 | 2012-07-11 | 北京蓝爱迪电力技术有限公司 | Follow-up brush type flexible sealing structure |
| WO2012170514A2 (en) * | 2011-06-07 | 2012-12-13 | Sealeze, A Unit Of Jason Incorporated | Quick change brush seal retaining arrangement |
| US20140174560A1 (en) * | 2012-12-20 | 2014-06-26 | Nathan Hastings | Bypass seal for rotary regenerative air preheaters |
| CN104913330A (en) * | 2015-05-07 | 2015-09-16 | 四川东能节能技术有限公司 | Air preheater and hot-end radial sealing device thereof |
| CN106016341A (en) * | 2016-05-17 | 2016-10-12 | 上海锅炉厂有限公司 | Rotor deformation self-compensation type radial sealing system for air preheater |
| CN206018695U (en) * | 2016-08-31 | 2017-03-15 | 长春市华源峙澔电力科技有限公司 | Rotary regenerative air preheater elastic sealing device |
-
2019
- 2019-02-27 CN CN201910146098.4A patent/CN111623661B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100937107B1 (en) * | 2009-09-24 | 2010-01-15 | 김창우 | Gas preheating apparatus |
| CN201992681U (en) * | 2011-03-02 | 2011-09-28 | 张玉伟 | Radial segmented sealing device for rotary air preheater |
| WO2012170514A2 (en) * | 2011-06-07 | 2012-12-13 | Sealeze, A Unit Of Jason Incorporated | Quick change brush seal retaining arrangement |
| CN202328340U (en) * | 2011-12-13 | 2012-07-11 | 北京蓝爱迪电力技术有限公司 | Follow-up brush type flexible sealing structure |
| US20140174560A1 (en) * | 2012-12-20 | 2014-06-26 | Nathan Hastings | Bypass seal for rotary regenerative air preheaters |
| CN104913330A (en) * | 2015-05-07 | 2015-09-16 | 四川东能节能技术有限公司 | Air preheater and hot-end radial sealing device thereof |
| CN106016341A (en) * | 2016-05-17 | 2016-10-12 | 上海锅炉厂有限公司 | Rotor deformation self-compensation type radial sealing system for air preheater |
| CN206018695U (en) * | 2016-08-31 | 2017-03-15 | 长春市华源峙澔电力科技有限公司 | Rotary regenerative air preheater elastic sealing device |
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| Publication number | Publication date |
|---|---|
| CN111623661B (en) | 2021-06-01 |
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Effective date of registration: 20230412 Address after: No. 4-104, Xinghecheng District D, Shifu West Road, Taihe District, Jinzhou City, Liaoning Province, 121000 Patentee after: Jinaote (Liaoning) energy saving and Environmental Protection Technology Co.,Ltd. Address before: 430000 room 86, trading hall 4, No. 2020, Jiefang Avenue, Jiang'an District, Wuhan City, Hubei Province Patentee before: HUBEI JIN'AOTE ENERGY-SAVING ENVIRONMENT TECHNOLOGY CO.,LTD. |