CN202267079U - Sealing device for rotary air preheater - Google Patents
Sealing device for rotary air preheater Download PDFInfo
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- CN202267079U CN202267079U CN2011203050875U CN201120305087U CN202267079U CN 202267079 U CN202267079 U CN 202267079U CN 2011203050875 U CN2011203050875 U CN 2011203050875U CN 201120305087 U CN201120305087 U CN 201120305087U CN 202267079 U CN202267079 U CN 202267079U
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- black box
- flexible sealing
- air preheater
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- radial
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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 discloses a sealing device for a rotary air preheater. The sealing device comprises radial flexible sealing assemblies and axial flexible sealing assemblies; each radial sealing assembly is arranged between each radial bin partition plate and each sector plate; one end of each radial flexible sealing assembly is fixed on each radial bin partition plate through bolts, and the other end of each radial flexible sealing assembly keeps slide contact with the inner surface of each sector plate; each axial flexible sealing assembly is arranged between each axial bin partition plate and each arc plate; and one end of each axial flexible sealing assembly is fixed on each axial bin partition plate through bolts, and the other end of each axial flexible sealing assembly keeps slide contact with the inner surface of each arc plate in an outer shell of the air preheater. The free ends of the flexible sealing assemblies of the seal device always keep zero clearance sealing with the sector plates and the arc plates, so the sealing device can adapt to the irregular change of sealing gaps, which is caused by mushroom deformation caused by heating of a rotor, manufacturing error, rotor swaying and swinging, vibration and the like, zero clearance sealing of the rotary air preheater in the running process is realized, and air leakage rate is reduced obviously.
Description
[technical field]
The utility model belongs to technical field of heat exchange, and it relates to a kind of sealing device of heat-exchange apparatus, particularly 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, with a kind of heat-exchange device of cold air heating back entering boiler auxiliary combustion, is used widely on the heavy duty boiler in modern times.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 leaked to fume side, promptly produce the problem of leaking out.Leaking out causes unit heating power operating mode relatively poor, quickens the cold end corrosion process, reduces generatine set heat efficiency, increases the ventilating machinary power consumption, and boiler efficiency is reduced, and influences the unit overall operation.At present, along with the continuous increase of boiler capacity, rotary regenerative air preheater is also more and more big, and this makes problem such as leak out more outstanding.The air leak rate of air curtain of rotary regenerative air preheater general requirement in design is not more than 10%, but practical application much is 20～30%, sometimes even up to 40%.The main cause that rotary air preheater air leak is big is that rotor with variations in temperature irregular mushroom deformation takes place, and causes between apex seal and the fanning strip, the excesssive gap between axial seal sheet and the air preheater shell.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 in advance by calculating the hot shaping parameter, is reserved seal clearance.Because the elasticity of rigid straight plate seals is relatively poor, the preset clearance between sealing surface and the diaphragm seal can not be too small, can produce clamping stagnation otherwise be in operation, and can make between rotor and shell, the fanning strip and scratch, and influences the normal operation of equipment; And a slot reservation is excessive, can not well seal, and makes the hot operating increasing of leaking out of rotary regenerative air preheater.
[utility model content]
The purpose of the utility model is: the deficiency that overcomes prior art; A kind of rotary regenerative air preheater sealing device is provided; The sealing device can not only dwindle seal clearance; And can make rotor produce the random gap minimizing that distortion causes because of being heated, thereby reduce the inleakage of air preheater significantly.
The purpose of the utility model is achieved in that it comprises radial seal and axial seal; Radial seal, axial seal is installed on radially the storehouse dividing plate respectively, axially on the dividing plate of storehouse; Radially storehouse dividing plate, axial storehouse dividing plate are laid in radially and form rotor on the central shaft; Rotor radially up and down symmetry be equipped with fixing fanning strip; Its improvements are: radial seal is to be located at the radially radial compliance black box between the storehouse dividing plate and fanning strip, and an end of radial compliance black box is through being bolted to radially on the dividing plate of storehouse, and the inner surface of the other end and fanning strip keeps sliding-contact; Axial seal is the axial elasticity black box of being located between axial storehouse dividing plate and the arc, and axial elasticity black box one end is through being bolted on the dividing plate of axial storehouse, and the other end keeps sliding-contact with the arc inner surface of being located in the air preheater shell;
In the above-mentioned rotary regenerative air preheater sealing device, the free end of said radial compliance black box leaves the magnitude of interference when contacting with the inner surface of fanning strip, and the radial compliance black box is warp architecture; The free end of axial elasticity black box leaves the magnitude of interference when contacting with the inner surface of arc, and the axial elasticity black box is warp architecture;
In the above-mentioned rotary regenerative air preheater sealing device, said radial compliance black box is arranged in order fastening the composition by bent plate, flexible sealing fin, and the flexible sealing fin height is higher than bent plate;
In the above-mentioned rotary regenerative air preheater sealing device, said radial compliance black box contains and does not wait high flexible sealing fin more than two, and flexible sealing fin is the structural arrangement of successively decreasing highly successively from bent plate one side;
In the above-mentioned rotary regenerative air preheater sealing device, the opposite side of said flexible sealing fin is equipped with pressing plate, and pressing plate is located at radial compliance black box lower end, and an end of pressing plate is provided with the jag that deviates from the flexible sealing assembly;
In the above-mentioned rotary regenerative air preheater sealing device, said bent plate and flexible sealing fin weld together, and offer the bolt hole of alignment on radial compliance black box and the pressing plate;
In the above-mentioned rotary regenerative air preheater sealing device, said axial elasticity black box is arranged in order fastening the composition by bent plate, flexible sealing fin, and the flexible sealing fin height is higher than bent plate;
In the above-mentioned rotary regenerative air preheater sealing device, said bent plate one side is arranged with and does not wait high flexible sealing fin more than two, and flexible sealing fin is the structural arrangement of successively decreasing highly successively;
In the above-mentioned rotary regenerative air preheater sealing device, said bent plate and flexible sealing fin weld together, and offer the bolt hole of alignment on the radial compliance black box.
The beneficial effect of the utility model is: the free end of the flexible sealing assembly of sealing device keeps the zero clearance sealing with fanning strip and arc all the time; Adaptation produces the irregular variation of seal clearance that reasons such as mushroom distortion, foozle, rotor are rocked, swung, vibration cause owing to rotor is heated, realized the zero clearance sealing that rotary regenerative air preheater is in operation obviously having reduced inleakage; Improved the efficient of boiler; Reduce the power of Blower for sucking or supplying, the inleakage of the utility model is 1/5～1/10 of a conventional seals, and leakage loss descends significantly; Simple in structure, construction, enforcement, transformation are easily.
[description of drawings]
Concrete structure below in conjunction with detailed description of the drawings the utility model
Fig. 1 is the structural representation of the utility model rotary regenerative air preheater sealing device
Fig. 2 is the scheme of installation of radial compliance black box in the rotary regenerative air preheater sealing device
Fig. 3 is the scheme of installation of axial flexible sealing assembly in the rotary regenerative air preheater sealing device
Fig. 4 is the assembled arrangement sketch map of flexible sealing fin in the rotary regenerative air preheater sealing device
Fig. 5 is the assembled arrangement sketch map of flexible sealing fin among another embodiment
Among the figure: 1, central shaft; 2, rotor; 3, arc; 4, fanning strip; 5, storehouse dividing plate radially; 6, radial compliance black box; 7, axial elasticity black box; 8, axial storehouse dividing plate; 9, bent plate; 10, flexible sealing fin; 11, pressing plate.
[specific embodiment]
Extremely shown in Figure 3 like Fig. 1; The rotary regenerative air preheater sealing device of the utility model comprises radial seal and axial seal; Rotor 2 centers at air preheater are provided with central shaft 1; On rotor 2, be provided with several radially storehouse dividing plates 5 that are provided with radially, axial storehouse dividing plate 8, the radially symmetrical up and down of rotor 2 is equipped with fixing fanning strip 4, is provided with arc 3 in the air preheater shell; Wherein, radial seal is to be located at the radially radial compliance black box 6 between the storehouse dividing plate 5 and fanning strip 4, and an end of radial compliance black box 6 is through being bolted to radially on the storehouse dividing plate 5, and the inner surface of the other end and fanning strip 4 keeps sliding-contact; And axial seal is the axial elasticity black box of being located between axial storehouse dividing plate 8 and the arc 37; Axial elasticity black box 7 one ends are through being bolted on the axial storehouse dividing plate 8, and the other end keeps sliding-contact with arc 3 inner surfaces of being located in the air preheater shell.Radial compliance black box 6 is arranged in order fastening the composition by bent plate 9, flexible sealing fin 10, and the lower end alignment of bent plate 9 and flexible sealing fin 10 welds together and is installed in radially on the storehouse dividing plate 5 through bolt, and flexible sealing fin 10 highly is higher than bent plate 9; The free end of flexible sealing fin 10 leaves the magnitude of interference when contacting with the inner surface of fanning strip 4, and radial compliance black box 6 is warp architecture, and it is on the direction of rotation of rotor 2; Bent plate 9 tilts with the flexible sealing assembly in obtuse angle, when the rotor cold conditions, and the flexible or resilience of flexible sealing assembly; When the mushroom distortion took place, 6 interference of radial compliance black box reduced gradually, when the mushroom distortion is accomplished; The basic seal clearance that keeps is zero, effectively the shutoff triangle district of leaking out; Because radial compliance black box 6 has prestressing force, and can be to resist wind pressure one time, when the mushroom distortion was accomplished, the flexibility of flexible sealing fin 10 diminished, and is equivalent to straight plate, has overcome the deficiency of the frequent scraped finish fanning strip 4 of existing diaphragm seal.The axial elasticity black box is arranged in order fastening the composition by bent plate 9, flexible sealing fin 10, and flexible sealing fin 10 highly is higher than bent plate 9.The free end of axial elasticity black box 7 leaves the magnitude of interference when contacting with the inner surface of arc 3, and axial elasticity black box 7 mounting structures are identical with radial compliance black box 6.
Preferably, be provided with pressing plate 11 in the lower end of radial compliance black box 6, pressing plate 11 places the opposite side of flexible sealing fin 10, offers the bolt hole of alignment on pressing plate 11 and the radial compliance black box 6, through bolt on storehouse dividing plate 5 radially.What deserves to be mentioned is that an end of pressing plate 11 is provided with the jag that deviates from the flexible sealing assembly, this jag can prevent effectively that wind, cigarette from washing away the flexible sealing assembly.
Preferably, as shown in Figure 4, can be provided with two in each radial compliance black box 6, the axial elasticity black box 7 and not wait high flexible sealing fin 10, flexible sealing fin 10 is the structural arrangement of successively decreasing highly successively from bent plate 9 one sides.
Further, as shown in Figure 5, can be provided with flexible sealing fin 10 in each radial compliance black box 6, the axial elasticity black box 7 above two, flexible sealing fin 10 is the structural arrangement of successively decreasing highly successively from bent plate 9 one sides.
Radial compliance black box 6, the 7 flexible or resiliences of axial elasticity black box of the rotary regenerative air preheater sealing device that this is novel; Very little with the adjustable gaps of fanning strip 4, arc 3; Can remain the sliding-contact of flexible sealing fin 10 and fanning strip 4, arc 3 in the course of the work, be zero purpose thereby reach the maintenance seal clearance basically.
The preferred embodiment that is merely the utility model described above, the utility model is not limited to above-mentioned embodiment, any retouching that all those of ordinary skill in the art make according to above description, revises or is equal to replacement, all belongs to this novel scope of protecting.
Claims (9)
1. rotary regenerative air preheater sealing device; It comprises radial seal and axial seal; Radial seal, axial seal is installed on radially the storehouse dividing plate respectively, axially on the dividing plate of storehouse; Radially the storehouse dividing plate, axially the storehouse dividing plate is laid in radially and forms rotor on the central shaft, rotor radially up and down symmetry be equipped with fixing fanning strip, it is characterized in that: radial seal is to be located at the radially radial compliance black box between the storehouse dividing plate and fanning strip; One end of radial compliance black box is through being bolted to radially on the dividing plate of storehouse, and the inner surface of the other end and fanning strip keeps sliding-contact; Axial seal is the axial elasticity black box of being located between axial storehouse dividing plate and the arc, and axial elasticity black box one end is through being bolted on the dividing plate of axial storehouse, and the other end keeps sliding-contact with the arc inner surface of being located in the air preheater shell.
2. rotary regenerative air preheater sealing device according to claim 1 is characterized in that: the free end of radial compliance black box leaves the magnitude of interference when contacting with the inner surface of fanning strip, and the radial compliance black box is warp architecture; The free end of axial elasticity black box leaves the magnitude of interference when contacting with the inner surface of arc, and the axial elasticity black box is warp architecture.
3. rotary regenerative air preheater sealing device according to claim 1 and 2 is characterized in that: the radial compliance black box is arranged in order fastening the composition by bent plate, flexible sealing fin, and the flexible sealing fin height is higher than bent plate.
4. rotary regenerative air preheater sealing device according to claim 3 is characterized in that: the radial compliance black box contains and does not wait high flexible sealing fin more than two, and flexible sealing fin is the structural arrangement of successively decreasing highly successively from bent plate one side.
5. rotary regenerative air preheater sealing device according to claim 4 is characterized in that: the opposite side of flexible sealing fin is equipped with pressing plate, and pressing plate is located at radial compliance black box lower end, and an end of pressing plate is provided with the jag that deviates from the flexible sealing assembly.
6. rotary regenerative air preheater sealing device according to claim 5 is characterized in that: bent plate and flexible sealing fin weld together, and offer the bolt hole of alignment on radial compliance black box and the pressing plate.
7. rotary regenerative air preheater sealing device according to claim 1 and 2 is characterized in that: the axial elasticity black box is arranged in order fastening the composition by bent plate, flexible sealing fin, and the flexible sealing fin height is higher than bent plate.
8. rotary regenerative air preheater sealing device according to claim 7 is characterized in that: bent plate one side is arranged with and does not wait high flexible sealing fin more than two, and flexible sealing fin is the structural arrangement of successively decreasing highly successively.
9. rotary regenerative air preheater sealing device according to claim 8 is characterized in that: bent plate and flexible sealing fin weld together, and offer the bolt hole of alignment on the radial compliance black box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203050875U CN202267079U (en) | 2011-08-19 | 2011-08-19 | Sealing device for rotary air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203050875U CN202267079U (en) | 2011-08-19 | 2011-08-19 | Sealing device for rotary air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202267079U true CN202267079U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203050875U Expired - Fee Related CN202267079U (en) | 2011-08-19 | 2011-08-19 | Sealing device for rotary air preheater |
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| CN (1) | CN202267079U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613493A (en) * | 2015-01-26 | 2015-05-13 | 张洪福 | Rotating type air pre-heater sector plate |
| CN105020735A (en) * | 2015-07-10 | 2015-11-04 | 清华大学 | Suction-type rotary air preheater |
| CN105486162A (en) * | 2015-12-31 | 2016-04-13 | 上海市东方海事工程技术有限公司 | Optical fiber air preheater air leakage control system and control method thereof |
| CN107270321A (en) * | 2017-08-04 | 2017-10-20 | 四川大智工程技术有限公司 | A kind of intelligent sealing system of air preheater |
| CN107894007A (en) * | 2017-11-08 | 2018-04-10 | 上海锅炉厂有限公司 | A kind of floating regenerative air heater hot junction radial sealing system |
| WO2019062597A1 (en) * | 2017-09-18 | 2019-04-04 | 广东工业大学 | Ceramic kiln waste heat comprehensive recycling system |
| 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
- 2011-08-19 CN CN2011203050875U patent/CN202267079U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613493A (en) * | 2015-01-26 | 2015-05-13 | 张洪福 | Rotating type air pre-heater sector plate |
| CN104613493B (en) * | 2015-01-26 | 2017-03-15 | 张洪福 | A kind of rotary regenerative air preheater fanning strip |
| CN105020735A (en) * | 2015-07-10 | 2015-11-04 | 清华大学 | Suction-type rotary air preheater |
| CN105486162A (en) * | 2015-12-31 | 2016-04-13 | 上海市东方海事工程技术有限公司 | Optical fiber air preheater air leakage control system and control method thereof |
| CN105486162B (en) * | 2015-12-31 | 2018-05-18 | 上海市东方海事工程技术有限公司 | A kind of optical fiber type air preheater air leak control system and its control method |
| CN107270321A (en) * | 2017-08-04 | 2017-10-20 | 四川大智工程技术有限公司 | A kind of intelligent sealing system of air preheater |
| WO2019062597A1 (en) * | 2017-09-18 | 2019-04-04 | 广东工业大学 | Ceramic kiln waste heat comprehensive recycling system |
| CN107894007A (en) * | 2017-11-08 | 2018-04-10 | 上海锅炉厂有限公司 | A kind of floating regenerative air heater hot junction radial sealing system |
| CN107894007B (en) * | 2017-11-08 | 2023-10-17 | 上海锅炉厂有限公司 | Hot end radial sealing system of floating 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20120819 |