CN211854078U - Air heater sector plate brush type sealing system - Google Patents
Air heater sector plate brush type sealing system Download PDFInfo
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- CN211854078U CN211854078U CN202020477350.8U CN202020477350U CN211854078U CN 211854078 U CN211854078 U CN 211854078U CN 202020477350 U CN202020477350 U CN 202020477350U CN 211854078 U CN211854078 U CN 211854078U
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- air preheater
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- 238000007789 sealing Methods 0.000 title claims abstract description 64
- 235000013358 Solanum torvum Nutrition 0.000 title claims abstract description 39
- 240000002072 Solanum torvum Species 0.000 title claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 16
- 239000003546 flue gas Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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 an air preheater sector plate brush type sealing system, which comprises a sector plate, a sealing connecting piece, a sector plate brush type seal, an air preheater rotor, a rotor center cylinder and an air preheater sealing sheet; the rotor of the air preheater is sleeved on the rotor center cylinder and can do circular motion around the rotor center cylinder, and the top surface and the bottom surface of the rotor of the air preheater are respectively provided with an air preheater sealing sheet; and a plurality of sector plates are uniformly distributed at a certain distance from each air preheater sealing strip along the circumferential direction of the rotor central cylinder, and a plurality of sector plate brush seals are uniformly connected to one side of each sector plate, which faces to the corresponding air preheater sealing strip, along the radial direction through a sealing connecting piece. The utility model discloses an arrange the sealing brush on air heater sector plate to reduce the clearance of gasket and sector plate in the actual motion, thereby reduce air heater rate of leaking out.
Description
Technical Field
The utility model belongs to energy-concerving and environment-protective field, concretely relates to brush sealing system of air heater sector plate is applicable to coal fired power plant boiler air heater and seals.
Background
The air preheater is an important auxiliary device of a power station boiler, and is a heat exchange device for heating low-temperature air required by combustion by using high-temperature flue gas in a tail flue of the boiler.
When the air preheater is in operation, high-temperature flue gas enters the air preheater from the tail flue from top to bottom along the vertical direction, and cold air enters the air preheater from the fan outlet air duct from bottom to top along the vertical direction. The inlet flue gas and the outlet air are both positioned at the upper part of the air preheater and belong to the hot end of the rotor of the air preheater, the average temperature of the hot end is above 300 ℃, and the temperature of the hot end is higher. The outlet flue gas and the inlet air are both positioned at the lower part of the air preheater and belong to the cold end of the rotor of the air preheater, the average temperature of the cold end is below 100 ℃, and the temperature of the cold end is lower. Because the hot end temperature of the rotor is higher and the cold end temperature is lower, the hot end expansion amount is greater than the cold end expansion amount in actual operation, so that the air preheater rotor is subjected to mushroom-shaped deformation, a gap exists between the sealing sheet of the air preheater rotor and the sector plate of the air preheater, and air leakage exists in the air preheater.
At present, the main sealing structure of the air preheater comprises: air leakage control systems, fixed seals, leaf spring seals, hinge spring seals, elastic adaptive seals, brush seal technology, hinge seals, clearance self-compensating air leakage control systems, ducted seals, and the like. The air leakage of the air preheater is mainly determined by the clearance between the sealing sheet and the sector plate, in the sealing system, the air leakage control system adopts the movable sector plate to reduce the clearance, the sector plates of other air leakage control systems are fixed, and the sealing sheets in different forms are adopted to reduce the clearance. All the fan-shaped plates are of flat plate structures, no accessory sealing device is arranged on the fan-shaped plates, and the fan-shaped plates are not used for increasing the sealing devices to reduce the air leakage rate of the air preheater.
Therefore, it is desirable to provide an air leakage device of an air preheater, which has a relatively simple structure, a reasonable design and a good operation effect, and is convenient to popularize in production.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned problem, provide a arrange sealed brush on air heater sector plate, reduce the clearance of gasket and sector plate among the actual motion to reduce the air heater sector plate brush type sealing system of air heater rate of leaking out.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a fan-shaped plate brush type sealing system of an air preheater comprises a fan-shaped plate, a sealing connecting piece, a fan-shaped plate brush type seal, an air preheater rotor, a rotor center cylinder and an air preheater sealing strip; wherein,
the air preheater rotor is sleeved on the rotor center cylinder and can do circular motion around the rotor center cylinder, and air preheater sealing pieces are uniformly arranged on the top surface and the bottom surface of the air preheater rotor;
and a plurality of sector plates are uniformly distributed at a certain distance from each air preheater sealing strip along the circumferential direction of the rotor central cylinder, and a plurality of sector plate brush seals are uniformly connected to one side of each sector plate, which faces to the corresponding air preheater sealing strip, along the radial direction through a sealing connecting piece.
The utility model discloses further improvement lies in, and the air heater rotor is rotary air heater rotor, and air heater is three fens storehouse formulas or four fens storehouse formulas.
The utility model discloses further improvement lies in, sector plate includes sector plate between once wind and flue gas, sector plate between once wind and overgrate air, overgrate air and flue gas sector plate.
The utility model discloses a further improvement lies in, and the sector plate includes air heater's cold junction sector plate and hot junction sector plate.
The utility model discloses a further improvement lies in, the brush seal of sector plate on air heater's hot junction sector plate is located the bottom surface of sector plate, and the brush seal of sector plate on air heater's cold junction sector plate is located the top surface of sector plate.
The utility model discloses a further improvement lies in, the sector plate is provided with in the flue.
The utility model discloses a further improvement lies in, fan-shaped board brush seals adopts carbon steel wire, ND steel wire or resistant the time steel wire to make.
The utility model discloses a further improvement lies in, and sealing connection spare adopts the layering formula to connect or adopts welding, riveting mode to connect.
The utility model discloses a further improvement lies in, the brush seal of sector plate on the sector plate can be sealed for sliding block formula, fixed sealed, shell fragment formula is sealed, hinge spring is sealed or elasticity self-adaptation is sealed.
The utility model discloses further improvement lies in, the length of sector plate brush seal is greater than the interval between sector plate and the air heater gasket that corresponds.
The utility model discloses it lies in to have following profitable effect at least:
the high-temperature flue gas enters the air preheater from top to bottom, and the cold air enters the air preheater from bottom to top. High-temperature flue gas and high-temperature air all are located air heater upper portion, and air heater hot end temperature is higher, and low temperature flue gas and low temperature air all are located air heater lower part, and air heater cold junction temperature is lower. When the air preheater operates, the hot end expansion amount is larger than the cold end expansion amount, so that the air preheater rotor is subjected to mushroom-shaped deformation, the gap distance between the cold end sealing sheet of the air preheater rotor and the corresponding sector plate at the cold end is increased, and the air leakage of the air preheater is increased. The fan-shaped plate brush seals are uniformly distributed on the cold and hot end fan-shaped plates, so that air leakage between the cold and hot end sealing pieces and the fan-shaped plates corresponding to the cold and hot ends can be effectively blocked, and the air leakage rate of the air preheater is reduced. The utility model discloses an arrange that the principle is simple, the construction installation degree of difficulty is little, have higher practicality.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the brush seal of the present invention;
fig. 3 is a schematic diagram illustrating thermal deformation of the rotor in a cold state according to the present invention.
Fig. 4 is a schematic view of the thermal deformation of the rotor in the thermal state according to the present invention.
Description of reference numerals:
1-a sector plate; 2-sealing the connecting piece; 3-fan-shaped plate brush type sealing; 4-an air preheater rotor; 5-rotor central cylinder; 6-air preheater sealing fin; 7-hot end sector plates; 8-hot end sealing sheet; 9-cold end sealing sheet; 10-cold end sector plate.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
Referring to fig. 1 and 2, the utility model provides a pair of air heater sector plate brush sealing system, including sector plate 1, sealing connection piece 2, the brush of sector plate sealed 3, air heater rotor 4, a rotor center section of thick bamboo 5 and air heater gasket 6.
The air preheater rotor 4 is sleeved on the rotor center cylinder 5 and can do circular motion around the rotor center cylinder 5, and air preheater sealing pieces 6 are uniformly arranged on the top surface and the bottom surface of the air preheater rotor 4; and a plurality of sector plates 1 are uniformly distributed at a certain distance from each air preheater sealing strip 6 along the circumferential direction of the rotor central cylinder 5, and one side of each sector plate 1 facing the corresponding air preheater sealing strip 6 is uniformly connected with a plurality of sector plate brush seals 3 along the radial direction through a sealing connecting piece 2.
Preferably, the air preheater rotor 4 is a rotary air preheater rotor, which may be a triple or quad chamber.
Preferably, the sector plate 1 should include a primary air and flue gas sector plate, a primary air and secondary air sector plate, and a secondary air and flue gas sector plate. Sector plate 1 should include an air preheater cold end sector plate 10 and an air preheater hot end sector plate 7. The sector plate 1 should be arranged in the flue.
Preferably, the sector plate brush seal 3 on the hot end sector plate 7 of the air preheater is located on the bottom surface of the sector plate, and the sector plate brush seal 3 on the cold end sector plate 10 of the air preheater is located on the top surface of the sector plate.
Preferably, the sealing connector 2 can be in the form of a pressing bar type connector or a plurality of methods such as welding, riveting and the like.
Preferably, the sector plate brush seal 3 can be adopted on the sector plate 1, and other sealing forms such as a sliding block type seal, a fixed type seal, a spring sheet type seal, a hinge spring type seal, an elastic self-adaptive seal and the like can also be adopted.
Preferably, the length of the sector plate brush seal 3 is larger than the distance between the sector plate 1 and the corresponding air preheater sealing plate 6, so as to ensure that the sector plate brush seal 3 can touch the air preheater sealing plate 6 in a hot state, and a better sealing effect is achieved. The sector plate brush seals 3 should be evenly distributed over the sector plate 1. The material of the segment brush type seal 3 may be a carbon steel wire, an ND steel wire, or a weather resistant steel wire.
The utility model discloses a concrete working process does:
in the embodiment, the high-temperature flue gas enters the air preheater from top to bottom, and the cold air enters the air preheater from bottom to top. High-temperature flue gas and high-temperature air all are located air heater upper portion, and air heater hot end temperature is higher, and low temperature flue gas and low temperature air all are located air heater lower part, and air heater cold junction temperature is lower. When the air preheater operates, the hot end expansion amount is larger than the cold end expansion amount, so that the air preheater rotor is subjected to mushroom-shaped deformation, the gap distance between the cold end sealing sheet of the air preheater rotor and the corresponding sector plate at the cold end is increased, and the air leakage of the air preheater is increased. The fan-shaped plate brush seals are uniformly distributed on the cold and hot end fan-shaped plates, so that air leakage between the cold and hot end sealing pieces and the fan-shaped plates corresponding to the cold and hot ends can be effectively blocked, and the air leakage rate of the air preheater is reduced. As shown in fig. 2, the sector brush seals should be fixed to the sector plates by sealing joints, while the sector brush seals should be evenly distributed over the sector plates. The sealing connecting piece can be in a pressing strip type connection mode or in a plurality of modes such as welding, riveting and the like. As shown in fig. 3 and 4, in the hot state operation, the distance between the hot end sector plate 7 and the hot end sealing plate 8 is larger than that in the cold state of the air preheater, so that the length of the hot end sector plate brush seal is larger than that between the hot end sector plate 7 and the hot end sealing plate 8 in the hot state operation. When the air preheater operates in a hot state, the distance between the cold end sector plate 10 and the cold end sealing sheet 9 is smaller than the distance between the cold end sector plate and the cold end sealing sheet 9 when the air preheater operates in a cold state, and therefore the length of the brush seal of the cold end sector plate is larger than the distance between the cold end sector plate 10 and the cold end sealing sheet 9 when the air preheater operates in a cold state. In actual operation, because the brush seal of the sector plate rubs with the sealing plate, after long-term operation, the brush seal length of the sector plate can be self-adaptive to reach the degree that the thermal state working condition is just connected with the sealing plate, the air leakage rate between the sealing plate and the sector plate can be effectively blocked, and the air leakage rate of the air preheater can be effectively reduced. The utility model discloses an arrange that the principle is simple, the construction installation degree of difficulty is little, have higher practicality.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
Claims (10)
1. An air preheater sector plate brush type sealing system is characterized by comprising a sector plate (1), a sealing connecting piece (2), a sector plate brush type seal (3), an air preheater rotor (4), a rotor central cylinder (5) and an air preheater sealing strip (6); wherein,
the air preheater rotor (4) is sleeved on the rotor center cylinder (5) and can do circular motion around the rotor center cylinder (5), and air preheater sealing pieces (6) are uniformly arranged on the top surface and the bottom surface of the air preheater rotor (4);
and a plurality of sector plates (1) are uniformly distributed at a certain distance from each air preheater sealing plate (6) along the circumferential direction of the rotor center cylinder (5), and a plurality of sector plate brush seals (3) are uniformly connected to one side of each sector plate (1) facing the corresponding air preheater sealing plate (6) along the radial direction through a sealing connecting piece (2).
2. An air preheater sector plate brush seal system according to claim 1, wherein the air preheater rotor (4) is a rotary air preheater rotor and the air preheater is a triple or quad chamber.
3. An air preheater sector plate brush seal system according to claim 1, characterized in that the sector plates (1) include a primary air and flue gas sector plate, a primary air and secondary air sector plate, and a secondary air and flue gas sector plate.
4. An air preheater sector plate brush seal system according to claim 1, characterized in that the sector plates (1) comprise the cold end sector plate (10) and the hot end sector plate (7) of the air preheater.
5. An air preheater sector plate brush seal system according to claim 4, characterized in that the sector plate brush seal (3) on the hot end sector plate (7) of the air preheater is located on the bottom face of the sector plate and the sector plate brush seal (3) on the cold end sector plate (10) of the air preheater is located on the top face of the sector plate.
6. An air preheater sector plate brush seal system according to claim 1, characterized in that the sector plate (1) is disposed in the flue.
7. An air preheater sector plate brush seal system according to claim 1, characterized in that the sector plate brush seal (3) is made of carbon steel wire, ND steel wire or weather resistant steel wire.
8. An air preheater sector plate brush seal system according to claim 1, wherein the seal attachment (2) is a batten type connection or a welded, riveted connection.
9. An air preheater sector plate brush seal system according to claim 1, characterized in that the sector plate brush seal (3) on the sector plate (1) can be replaced with a slider seal, a fixed seal, a leaf spring seal, a hinge spring seal or a resilient adaptive seal.
10. An air preheater sector plate brush seal system according to claim 1, characterized in that the sector plate brush seal (3) has a length greater than the spacing between the sector plate (1) and the corresponding air preheater seal plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020477350.8U CN211854078U (en) | 2020-04-03 | 2020-04-03 | Air heater sector plate brush type sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020477350.8U CN211854078U (en) | 2020-04-03 | 2020-04-03 | Air heater sector plate brush type sealing system |
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| Publication Number | Publication Date |
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| CN211854078U true CN211854078U (en) | 2020-11-03 |
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| CN202020477350.8U Active CN211854078U (en) | 2020-04-03 | 2020-04-03 | Air heater sector plate brush type sealing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797435A (en) * | 2020-12-24 | 2021-05-14 | 苏州市腾中钛设备制造有限公司 | Novel rotary air preheater with circular truncated cone |
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2020
- 2020-04-03 CN CN202020477350.8U patent/CN211854078U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797435A (en) * | 2020-12-24 | 2021-05-14 | 苏州市腾中钛设备制造有限公司 | Novel rotary air preheater with circular truncated cone |
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