CN201992684U - Sealing device for rotary air preheater - Google Patents
Sealing device for rotary air preheater Download PDFInfo
- Publication number
- CN201992684U CN201992684U CN2011200996391U CN201120099639U CN201992684U CN 201992684 U CN201992684 U CN 201992684U CN 2011200996391 U CN2011200996391 U CN 2011200996391U CN 201120099639 U CN201120099639 U CN 201120099639U CN 201992684 U CN201992684 U CN 201992684U
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- plate
- air preheater
- sealing
- central tube
- black box
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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 sealing device, in particular to a sealing device for a rotary air preheater, which is designed for solving the problem of air leakage from an air side to a flue gas side caused by excessive gaps between a radial sealing fin and a sector plate and between an axial sealing fin and an arc plate of an existing rotary air preheater. The sealing device is characterized in that a rotor is provided with a radial partition bin partition plate and an axial partition bin partition plate, an air preheater shell is provided with an arc plate, sector plates are mounted on the rotor radially, vertically and symmetrically, two ends of each sector plate are provided with a buffer plate, a radial flexible sealing component is arranged among the radial partition bin partition plate and the sector plates, an axial flexible sealing component is arranged between the axial partition bin partition plate and the arc plate, one end of the radial flexible sealing component is connected with the radial partition bin partition plate by the aid of bolts, and one end of the axial flexible sealing component is connected with the radial partition bin partition plate by the aid of bolts. The sealing device is used for preventing air leakage of the air preheater.
Description
Technical field
The utility model relates to a kind of sealing device, is specifically related to a kind of rotary regenerative air preheater sealing device.
Background technology
Rotary regenerative air preheater is to utilize the hot flue gas that the coal-burning boiler afterbody is discharged in the thermal power plant, a kind of heat-exchange device of boiler auxiliary combustion will be entered after the cold air heating, on modern heavy duty boiler, be used widely, gapped between rotor in the rotary regenerative air preheater and fanning strip and the air preheater shell, between the air side of preheater and the fume side bigger pressure reduction is arranged simultaneously, cause air side to be revealed to fume side, promptly produce the problem of leaking out, leak out and cause that the heating power operating mode is relatively poor rapidly, quicken the cold end corrosion process, reduce generatine set heat efficiency, increase the ventilating machinary power consumption, boiler efficiency is reduced, influence the unit overall operation, at present, continuous increase along with boiler capacity, rotary regenerative air preheater is also increasing, this makes problem such as leak out more outstanding, the air leak rate of air curtain of rotary regenerative air preheater generally requires to be not more than 10% in design, but practical application much is 15%～20%, sometimes even higher, the main cause that rotary air preheater air leak is big is that rotor varies with temperature the irregular mushroom deformation of generation, cause between apex seal and the fanning strip, excesssive gap between axial seal sheet and the arc, the size of air leak rate of air curtain is to weigh an important indicator of rotary regenerative air preheater technical merit, the rigid straight plate Sealing Technology of the general employing of the problem that solution is leaked out, promptly reserve seal clearance by calculating the hot shaping parameter in advance, because the elasticity of rigid straight plate seals is relatively poor, preset clearance between sealing surface and the diaphragm seal can not be too small, can produce clamping stagnation otherwise be in operation, can make rotor and shell, scratch between the fanning strip, the equipment that influences normally moves, and a slot reservation is excessive, can not well seal, make the hot operating increasing of leaking out of rotary regenerative air preheater.
The utility model content
The utility model is the excesssive gap between the apex seal and fanning strip that solve existing rotary regenerative air preheater, between axial seal sheet and the arc, the problem that causes air side to be leaked out to fume side, and then a kind of rotary regenerative air preheater sealing device is proposed.
The utility model is to address the above problem the technical scheme of taking to be: the utility model is provided with radial separations storehouse dividing plate and axially divides the compartment dividing plate on rotor, be provided with arc in the described air preheater shell, the footpath of described rotor symmetry up and down is equipped with fanning strip, the two ends of described fanning strip are provided with buffer board, be provided with the radial compliance black box between described radial separations storehouse dividing plate and the fanning strip, be provided with the axial elasticity black box between described axial minute compartment dividing plate and the arc, one end of described radial compliance black box is connected with radial separations storehouse dividing plate by bolt, the other end of described radial compliance black box contacts with fanning strip and slides on the surface of fanning strip, one end of described axial elasticity black box is connected with axially dividing the compartment dividing plate by bolt, the other end of described axial elasticity black box slides at the inner surface of arc, the central tube black box is fixedly mounted on the movable sealing reel, stationary seal ring is fixed on the static seal reel, and the central tube flexible sealing fin of central tube black box and stationary seal ring constitute the central tube sealing.
The beneficial effects of the utility model are: the free end of flexible sealing assembly of the present utility model keeps the zero distance clearance seal with fanning strip and arc all the time, adapt to because the distortion of rotor mushroom, foozle, rotor rocks, swing, the irregular variation of seal clearance that reasons such as vibration cause, realized the zero clearance sealing that rotary regenerative air preheater is in operation, reduced inleakage, improved the efficient of boiler, reduced the power of air-introduced machine and pressure fan, inleakage of the present utility model is 1/3～1/2 of a conventional seals, leakage loss declines to a great extent, and simple in structure, construction, implement, transform convenient simple and easy.
Description of drawings
Fig. 1 is the schematic diagram under the radial compliance black box duty of the present utility model; Fig. 2 is the schematic diagram under the axial elasticity black box duty of the present utility model; Fig. 3 is the structural representation of axial elasticity black box of the present utility model; Fig. 4 is the structural representation of radial compliance black box of the present utility model; Fig. 5 is the structural representation of axial elasticity diaphragm seal; Fig. 6 is the structural representation of radial compliance diaphragm seal of the present utility model; Fig. 7 is a central tube sealed structural representation of the present utility model; Fig. 8 is the structural representation of central tube black box of the present utility model; Fig. 9 is an overall structure schematic diagram of the present utility model; Figure 10 is the vertical view cutaway drawing of Fig. 9; Figure 11 is the structural representation of bent plate, the pressing plate of radial compliance black box when being another kind of shape; Figure 12 is the structural representation of the bent plate of axial elasticity black box when being another kind of shape.
The specific embodiment
The specific embodiment one: shown in Fig. 1-12, the rotor of the described rotary regenerative air preheater sealing device of present embodiment is provided with radial separations storehouse dividing plate 3 and axially divides compartment dividing plate 6, be provided with arc 1 in the described air preheater shell, the footpath of described rotor symmetry up and down is equipped with fanning strip 2, the two ends of described fanning strip 2 are provided with buffer board 10, be provided with radial compliance black box 4 between described radial separations storehouse dividing plate 3 and the fanning strip 2, be provided with axial elasticity black box 5 between described axial minute compartment dividing plate 6 and the arc 1, one end of described radial compliance black box 4 is connected with radial separations storehouse dividing plate 3 by bolt, the other end of described radial compliance black box 4 contacts with fanning strip 2 and slides on the surface of fanning strip 2, one end of described axial elasticity black box 5 is connected with axially dividing compartment dividing plate 6 by bolt, the other end of described axial elasticity black box 5 slides at the inner surface of arc 1, central tube black box 17 is fixedly mounted on the movable sealing reel 13, stationary seal ring 11 is fixed on the static seal reel 12, and the central tube flexible sealing fin 14 of central tube black box 17 constitutes the central tube sealing with stationary seal ring 11.
The specific embodiment two: shown in Fig. 1-12, the buffer board 10 of the described rotary regenerative air preheater sealing device of present embodiment is installed in the two ends of fanning strip 2, the outer of described buffer board 10 be inclined upwardly and with fanning strip 2 not on same plane, described buffer board 10 is straight plate or arc.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: shown in Fig. 1-12, the radial compliance black box 4 of the described rotary regenerative air preheater sealing device of present embodiment comprises first bent plate 7, first flexible sealing fin 8 and pressing plate 9, described first bent plate 7, first flexible sealing fin 8, pressing plate 9 are arranged in order from left to right and are fastenedly connected, and described first bent plate 7 is lower than first flexible sealing fin 8.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment four: shown in Fig. 1-12, the axial elasticity black box 5 of the described rotary regenerative air preheater sealing device of present embodiment comprises second bent plate 18 and second flexible sealing fin 19, described second bent plate 18, second flexible sealing fin 19 are arranged in order from left to right and are fastenedly connected, and described second bent plate 18 is lower than second flexible sealing fin 19.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment five: shown in Fig. 1-12, the flexible sealing fin 8 of the described rotary regenerative air preheater sealing device of present embodiment is made up of the diaphragm seal stack of arranging of successively decreasing successively of some leaf length, and described second flexible sealing fin 19 is superposeed and formed by successively decrease the successively diaphragm seal arranged of some leaf length.Other composition and annexation are identical with the specific embodiment three or four.
The specific embodiment six: shown in Fig. 1-12, the central tube black box 17 of the described rotary regenerative air preheater sealing device of present embodiment comprises central tube flexible sealing fin 14, central tube sealing backplate 15 and central tube sealing gripper shoe 16, described central tube sealing gripper shoe 16, central tube flexible sealing fin 14, central tube sealing backplate 15 are arranged in order from left to right and are fastenedly connected, and described central tube sealing backplate 15 is lower than central tube flexible sealing fin 14.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment seven: shown in Fig. 1-12, the bent plate 7 of the described rotary regenerative air preheater sealing device of present embodiment is that the connecting plate 7-1 and the swash plate 7-2 of U-shaped forms by cross section, the upper end of the lower end of described swash plate 7-2 and connecting plate 7-1 is affixed, described second bent plate 18 is that the second connecting plate 18-1 and the second swash plate 18-2 of U-shaped forms by cross section, and the upper end of the lower end of the described second swash plate 18-2 and the second connecting plate 18-1 is affixed.Other composition and annexation are identical with the specific embodiment three or four.
The specific embodiment eight: shown in Fig. 1-12, the pressing plate 9 of the described rotary regenerative air preheater sealing device of present embodiment is down that by straight plate 9-1 and cross section L shaped buffering pressing plate 9-2 forms, and the lower end of described buffering pressing plate 9-2 is affixed with the upper end of straight plate 9-1.Other composition and annexation are identical with the specific embodiment three.
The specific embodiment nine: shown in Fig. 1-12, the movable sealing reel 13 of the described rotary regenerative air preheater sealing device of present embodiment is installed on the rotor, described static seal reel 12 is installed on the rotor crossbeam, and movable sealing reel 13 and static seal reel 12 mutual corresponding matching.Other composition and annexation are identical with the specific embodiment one.
Claims (9)
1. rotary regenerative air preheater sealing device, it is characterized in that: rotor is provided with radial separations storehouse dividing plate (3) and axially divides compartment dividing plate (6), be provided with arc (1) in the described air preheater shell, the footpath of described rotor symmetry up and down is equipped with fanning strip (2), the two ends of described fanning strip (2) are provided with buffer board (10), be provided with radial compliance black box (4) between described radial separations storehouse dividing plate (3) and the fanning strip (2), be provided with axial elasticity black box (5) between described axial minute compartment dividing plate (6) and the arc (1), one end of described radial compliance black box (4) is connected with radial separations storehouse dividing plate (3) by bolt, the other end of described radial compliance black box (4) contacts with fanning strip (2) and slides on the surface of fanning strip (2), one end of described axial elasticity black box (5) is connected with axially dividing compartment dividing plate (6) by bolt, the other end of described axial elasticity black box (5) slides at the inner surface of arc (1), central tube black box (17) is fixedly mounted on the movable sealing reel (13), stationary seal ring (11) is fixed on the static seal reel (12), and the central tube flexible sealing fin (14) of central tube black box (17) constitutes the central tube sealing with stationary seal ring (11).
2. rotary regenerative air preheater sealing device according to claim 1, it is characterized in that: described buffer board (10) is installed in the two ends of fanning strip (2), the outer of described buffer board (10) be inclined upwardly and with fanning strip (2) not on same plane, described buffer board (10) is straight plate or arc.
3. rotary regenerative air preheater sealing device according to claim 1, it is characterized in that: described radial compliance black box (4) comprises first bent plate (7), first flexible sealing fin (8) and pressing plate (9), described first bent plate (7), first flexible sealing fin (8), pressing plate (9) are arranged in order from left to right and are fastenedly connected, and described first bent plate (7) is lower than first flexible sealing fin (8).
4. rotary regenerative air preheater sealing device according to claim 1, it is characterized in that: described axial elasticity black box (5) comprises second bent plate (18) and second flexible sealing fin (19), described second bent plate (18), second flexible sealing fin (19) are arranged in order from left to right and are fastenedly connected, and described second bent plate (18) is lower than second flexible sealing fin (19).
5. according to claim 3 or 4 described rotary regenerative air preheater sealing devices, it is characterized in that: described first flexible sealing fin (8) is made up of the diaphragm seal stack of arranging of successively decreasing successively of some leaf length, and described second flexible sealing fin (19) is superposeed and formed by successively decrease the successively diaphragm seal arranged of some leaf length.
6. rotary regenerative air preheater sealing device according to claim 1, it is characterized in that: described central tube black box (17) comprises central tube flexible sealing fin (14), central tube sealing backplate (15) and central tube sealing gripper shoe (16), described central tube sealing gripper shoe (16), central tube flexible sealing fin (14), central tube sealing backplate (15) are arranged in order from left to right and are fastenedly connected, and described central tube sealing backplate (15) is lower than central tube flexible sealing fin (14).
7. according to claim 3 or 4 described rotary regenerative air preheater sealing devices, it is characterized in that: described first bent plate (7) is that first connecting plate (7-1) and first swash plate (7-2) of U-shaped formed by cross section, the upper end of the lower end of described first swash plate (7-2) and first connecting plate (7-1) is affixed, described second bent plate (18) is that second connecting plate (18-1) and second swash plate (18-2) of U-shaped formed by cross section, and the upper end of the lower end of described second swash plate (18-2) and second connecting plate (18-1) is affixed.
8. rotary regenerative air preheater sealing device according to claim 3, it is characterized in that: described pressing plate (9) is down that by straight plate (9-1) and cross section L shaped buffering pressing plate (9-2) forms, and the lower end of described buffering pressing plate (9-2) is affixed with the upper end of straight plate (9-1).
9. rotary regenerative air preheater sealing device according to claim 1, it is characterized in that: described movable sealing reel (13) is installed on the rotor, described static seal reel (12) is installed on the rotor crossbeam, and movable sealing reel (13) and the mutual corresponding matching of static seal reel (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200996391U CN201992684U (en) | 2010-10-22 | 2011-04-07 | Sealing device for rotary air preheater |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020571465 | 2010-10-22 | ||
| CN201020571465.X | 2010-10-22 | ||
| CN2011200996391U CN201992684U (en) | 2010-10-22 | 2011-04-07 | Sealing device for rotary air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201992684U true CN201992684U (en) | 2011-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200996391U Expired - Fee Related CN201992684U (en) | 2010-10-22 | 2011-04-07 | Sealing device for rotary air preheater |
Country Status (1)
| Country | Link |
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| CN (1) | CN201992684U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953941A (en) * | 2014-05-05 | 2014-07-30 | 国投钦州发电有限公司 | Sealing system of air pre-heater |
| CN106287790A (en) * | 2016-08-31 | 2017-01-04 | 戴春喜 | Rotary regenerative air preheater and sealing structure thereof |
| CN111895443A (en) * | 2015-08-18 | 2020-11-06 | 傲华容客有限责任公司 | Flexible seal for rotary regenerative preheater |
| CN113803740A (en) * | 2021-09-08 | 2021-12-17 | 大唐蒲城发电有限责任公司 | Novel sealing device for preventing air leakage of air preheater rotor |
| CN114608374A (en) * | 2022-04-13 | 2022-06-10 | 贵州西能电力建设有限公司 | Radial sealing device of rotary air preheater |
-
2011
- 2011-04-07 CN CN2011200996391U patent/CN201992684U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953941A (en) * | 2014-05-05 | 2014-07-30 | 国投钦州发电有限公司 | Sealing system of air pre-heater |
| CN111895443A (en) * | 2015-08-18 | 2020-11-06 | 傲华容客有限责任公司 | Flexible seal for rotary regenerative preheater |
| CN106287790A (en) * | 2016-08-31 | 2017-01-04 | 戴春喜 | Rotary regenerative air preheater and sealing structure thereof |
| CN113803740A (en) * | 2021-09-08 | 2021-12-17 | 大唐蒲城发电有限责任公司 | Novel sealing device for preventing air leakage of air preheater rotor |
| CN113803740B (en) * | 2021-09-08 | 2024-04-09 | 大唐蒲城发电有限责任公司 | Air leakage prevention sealing device for rotor of air preheater |
| CN114608374A (en) * | 2022-04-13 | 2022-06-10 | 贵州西能电力建设有限公司 | Radial sealing device of rotary air preheater |
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Legal Events
| 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: 20110928 Termination date: 20170407 |
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| CF01 | Termination of patent right due to non-payment of annual fee |