CN202267080U - Self-compensation flexible sealing device for air preheater - Google Patents
Self-compensation flexible sealing device for air preheater Download PDFInfo
- Publication number
- CN202267080U CN202267080U CN2011203852132U CN201120385213U CN202267080U CN 202267080 U CN202267080 U CN 202267080U CN 2011203852132 U CN2011203852132 U CN 2011203852132U CN 201120385213 U CN201120385213 U CN 201120385213U CN 202267080 U CN202267080 U CN 202267080U
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- plate
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- flexible sealing
- air preheater
- flexible seal
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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 self-compensation flexible sealing device for an air preheater. The self-compensation flexible sealing device for the air preheater comprises a front clamp plate, a soot prevention layer, a connection plate, a flexible sealing layer, an elastic support plate, a positioning support plate, a rear clamp plate and a fixing bolt; the rear end of the flexible sealing layer is fixedly connected to the front end of the connection plate; the front side and the rear side of the flexible sealing layer are provided with the soot prevention layer and the elastic support plate; the flexible sealing layer comprises a metal wire layer and a sealing plate; and the sealing plate is inserted into the middle of the metal wire layer. The self-compensation flexible sealing device has the advantages of good sealing effect, long service life, simple structure, reasonable design, high manufacturing accuracy, low comprehensive cost, and the like.
Description
Technical field
The utility model relates to the sealing device of the rotary regenerative air preheater of the boiler in the steam turbine power generation unit, particularly this preheater, belongs to utilize the passage that rotatablely moves to carry out the parts of the equipment of heat exchange.
Background technology
In present domestic large-scale rotation air preheater structure, its inner sealing is a lamellar seal, and its structure is for being provided with radially around rotor rotated, axially and the hoop sealing pair, and seal is adjustable diaphragm seal, and diaphragm seal is fastened on the revolvable beam.Air preheater is divided into air side and fume side, has big pressure reduction between the two, because air preheater can produce mushroom deformation under working condition, diaphragm seal has the certain designed gap, causes the problem of air to smoke spillage, the said exactly problem of leaking out.Normal air leak rate of air curtain design load is about 9%.Existing diaphragm seal is the rigidity sealing device, though can the adjusting play, can only adjustment when installing or shut down; Can not when work, adjust, bump mill, the stuck machine that rises that influences equipment in order to prevent; The gap of adjustment is bigger when mounted, and the rotating cylinder of air preheater also can irregular protuberance take place with variations in temperature in work, cause the gap further to be strengthened; Make actual air leak rate of air curtain up to 20 % ~ 30%, obviously increase energy consumption and operation cost.
Summary of the invention
The purpose of the utility model is in order to overcome above-mentioned lamellar seal makes leakage greatly because of its gap weak point; Providing a kind of can replace diaphragm seal or be installed in simple and reasonable on the beam of rotating cylinder jointly with diaphragm seal; Good seal performance; Leakage rate is little, helps energy-conservation air preheater with the rotary regenerative air preheater that cuts operating costs and remedies flexible seal device certainly.
The air preheater of the utility model is from remedying flexible seal device; Comprise front plate, anti-grieshoch, gusset piece, flexible seal layer, elastic supporting plate, positioning supports plate, rear plate and the set bolt of blowing; The rear end of described flexible seal layer is fixed on the front end of gusset piece, and the front side of flexible seal layer and rear side have clamped respectively to be prevented blowing grieshoch and elastic supporting plate, and said flexible seal layer comprises metal wire layer and sealing plate; Wherein, sealing plate is inserted into the metal wire layer middle part.
For the ease of installing and helping rotating, the front end of gusset piece should rearward be bent has the adaptation angle.In order in hot environment, to keep good flexibility, said metal wire layer to select the high temperature resistant wire composition less with coefficient of friction for use, sealing plate and elastic supporting plate are selected resistant to elevated temperatures metal spring sheet for use.
The air preheater of the utility model is from remedying flexible seal device because will radially, axially and the leaf seal of the rigidity in the hoop sealing pair set up or change into oneself and remedy flexible seal device; The sealing of forming by flexible seal layer and elastic supporting plate; It is flexible and rigidity is moderate, even rotating cylinder is gone up in contact, does not also influence the normal operation of air preheater; Because of the flexibility and the wearability of flexible seal layer better; Elastic supporting plate is played a part protection, make that flexible seal layer can appropriately all the time contact with fanning strip under the effect of elastic supporting plate, accomplish the zero clearance sealing.Have and effectively to stop medium to leak outside, can prevent that again the medium of exterior ambient environment from getting into the interior leakage of sealed chamber.Leakage rate be merely general expression sealing the design leakage rate 1/5～1/20, can be reduced to 0.5～2%.Good sealing effect, long service life and simple in structure, reasonable in design, make accurately advantage such as integrated cost is low.
Description of drawings
Accompanying drawing 1 is that the utility model air preheater is from a kind of structural representation that remedies flexible seal device;
Accompanying drawing 2 and 3 is that air preheater is from the mounting structure sketch map that remedies flexible seal device.
The specific embodiment
The non-limiting specific embodiment that discloses the utility model of accompanying drawing further describes as follows in conjunction with accompanying drawing.
Referring to accompanying drawing 1～3,1 among the figure is sealing plate, 2 metal wire layers, and the 3rd, prevent blowing grieshoch, the 4th, elastic supporting plate, the 5th, positioning supports plate, the 6th, set bolt, the 7th, gusset piece, the 8th, flexible seal layer, the 9th, front plate, the 10th, rear plate; Among Fig. 2 11 is beams of rotating cylinder, the 12nd, and installing hole; Among Fig. 3 13 is original diaphragm seals.
Air preheater in the utility model comprises front plate 9, anti-grieshoch 3, gusset piece 7, flexible seal layer 8, elastic supporting plate 4, positioning supports plate 5, rear plate 10 and the set bolt 6 of blowing from remedying flexible seal device; Shown in Fig. 1～3; The rear end of described flexible seal layer 8 affixed (comprising that welding or crowded riveting connect) is on the front end of gusset piece 7; The front side of flexible seal layer 7 and rear side have clamped anti-grieshoch 3 and the elastic supporting plate 4 of blowing respectively; Wherein, said flexible seal layer 8 comprises metal wire layer 2 and sealing plate 1, and said sealing plate 1 is inserted into metal wire layer 2 middle parts.
In order in hot environment, to keep good flexibility, said metal wire layer 2 to select the high temperature resistant wire composition less with coefficient of friction for use, sealing plate 1 is selected resistant to elevated temperatures metal spring sheet for use with elastic supporting plate 4.
Gusset piece 7 is provided with installing hole 12.During installation, this gusset piece 7 is installed in through its installing hole 12 on the beam 11 of rotating cylinder of rotary regenerative air preheater, shown in Fig. 2～3.For the ease of installing and helping rotating, the front end of gusset piece can suitably bend towards a relative side of air preheater direction of rotation, can be as shown in Figure 3, be installed in the rear side of original diaphragm seal 13.
Claims (2)
1. an air preheater is from remedying flexible seal device; Comprise front plate, anti-grieshoch, gusset piece, flexible seal layer, elastic supporting plate, positioning supports plate, rear plate and the set bolt of blowing; The rear end of described flexible seal layer is welded on the front end of gusset piece, and the front side of flexible seal layer and rear side have clamped respectively to be prevented blowing grieshoch and elastic supporting plate, it is characterized in that said flexible seal layer comprises metal wire layer and sealing plate; Wherein, sealing plate is inserted into the metal wire layer middle part.
2. air preheater according to claim 1 is from remedying flexible seal device, it is characterized in that metal wire layer is selected for use high temperature resistantly to form with the less wire of coefficient of friction, and sealing plate and elastic supporting plate are selected resistant to elevated temperatures metal spring sheet for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203852132U CN202267080U (en) | 2011-10-12 | 2011-10-12 | Self-compensation flexible sealing device for air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203852132U CN202267080U (en) | 2011-10-12 | 2011-10-12 | Self-compensation flexible sealing device for air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202267080U true CN202267080U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203852132U Expired - Lifetime CN202267080U (en) | 2011-10-12 | 2011-10-12 | Self-compensation flexible sealing device for air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202267080U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439897A (en) * | 2015-10-13 | 2017-02-22 | 江苏鑫信润科技有限公司 | Air preheater automatic tracking reactive compensation three-way self-sealing device |
| CN111895443A (en) * | 2015-08-18 | 2020-11-06 | 傲华容客有限责任公司 | Flexible seal for rotary regenerative preheater |
-
2011
- 2011-10-12 CN CN2011203852132U patent/CN202267080U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895443A (en) * | 2015-08-18 | 2020-11-06 | 傲华容客有限责任公司 | Flexible seal for rotary regenerative preheater |
| CN106439897A (en) * | 2015-10-13 | 2017-02-22 | 江苏鑫信润科技有限公司 | Air preheater automatic tracking reactive compensation three-way self-sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120606 |
|
| CX01 | Expiry of patent term |