CN202546806U - Seal brush used in rotary air preheater and rotary air preheater - Google Patents
Seal brush used in rotary air preheater and rotary air preheater Download PDFInfo
- Publication number
- CN202546806U CN202546806U CN2012200580183U CN201220058018U CN202546806U CN 202546806 U CN202546806 U CN 202546806U CN 2012200580183 U CN2012200580183 U CN 2012200580183U CN 201220058018 U CN201220058018 U CN 201220058018U CN 202546806 U CN202546806 U CN 202546806U
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- China
- Prior art keywords
- brush
- air preheater
- sealing
- rotary regenerative
- regenerative air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 66
- 230000001172 regenerating effect Effects 0.000 claims description 45
- 239000002184 metal Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 241000500881 Lepisma Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Classifications
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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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- Air Supply (AREA)
Abstract
The utility model discloses a seal brush used in a rotary air preheater. The seal brush used in the rotary air preheater comprises a brush body (1), bristles (2) fixed on the brush body (1) and clamping units (4) arranged on two sides of the brush body (1), wherein the bristles (2) comprise a plurality of brushing filaments (3), one ends of the brushing filaments (3) are fixed together to form a bundle and arranged between the clamping units (4) to extend, and each brushing filament (3) is spiral. The utility model further discloses the rotary air preheater. The seal brush used in the rotary air preheater has the advantages of being large in intensity, good in fatigue resistance, long in service life and good in sealing effect, and enabling air leakage volume of the rotary air preheater to be small.
Description
Technical field
The utility model relates to a kind of sealing brush and rotary regenerative air preheater that is used for rotary regenerative air preheater.
Background technology
Rotary regenerative air preheater is the modal form of regenerative air preheater; It utilizes flue gas and air alternately to add hot-air through metal heated; Be the heat-exchanger rig of the flue gas tail end that generally adopts on the large-sized boiler of power plant, characteristics such as rotary regenerative air preheater has that compact conformation, volume are little, heat-transfer surface density height, complete machine light weight, metal consumption are few, be beneficial to mounting arrangements, cold end corrosion is light.The operation principle of rotary regenerative air preheater is: the rotor part of air preheater is made up of the heat transfer element of tens thousand of meters, and when air preheater slowly rotated, the reverse alternating current of flue gas and air was through air preheater.Heat accumulating element absorbs heat in fume side, in the air side heat release, thereby reaches the reduction exhaust gas temperature, improves the preheating effect of hot blast temperature.
But, because rotary regenerative air preheater has tumbler, can there be the gap between tumbler and the fixture, the medium of heat exchange simultaneously is different, and the pressure reduction between flue gas and the air is bigger, thereby causes the problem of leaking out.Inleakage was 6%～8% when operating mode was good; Inleakage is 20%～30% during poor sealing; Thereby can cause that rotary regenerative air preheater inlet blast reduces, the blower fan electric current raises; Excess air coefficient after the preheating raises, afterbody smoke discharging temperature drop is low, boiler thermal output reduces, coal-fired loss increases, and boiler does not reach rated load.
Because leaking out mainly of rotary regenerative air preheater because seal clearance causes; Therefore reduce inleakage in order to reduce seal clearance; Usually at radial clearance, radial clearance and the end play place of rotary regenerative air preheater sealing device is set, seals with gap everywhere to rotary regenerative air preheater.Chinese invention patent application CN101071048A discloses a kind of rotary regenerative air preheater that has brush seal installation; Mainly comprise: the rotating cylinder around central tube rotates, some radially storehouses dividing plate is arranged on the rotating cylinder, rotating cylinder is set with the preheater fixed housing outward; Footpath along rotating cylinder is fixed with fanning strip up and down symmetrically; Between rotating cylinder and fanning strip, the fixed housing sealing device is housed, it is characterized in that, described sealing device is: rotating cylinder each radially between storehouse dividing plate and the fanning strip radially; Between the outer rim of rotating cylinder and the fixed housing axially, and the hoop between upper and lower surperficial excircle of rotating cylinder and the fixed housing is equipped with brush seal.But because in the rotary regenerative air preheater operation process, sealing brush is bigger to the fatigue damage of bristle when interval through fanning strip and blast wandering, is easy to generate a brush breaking releasing, and the service life that causes sealing brush is shorter.In addition, after the brush silk was impaired, inleakage began to increase, and caused that sealing effectiveness reduces.
Therefore, need that a kind of intensity is big, fatigue resistance better, service life long sealing brush, and inleakage is little, sealing effectiveness rotary regenerative air preheater preferably.
The utility model content
The purpose of the utility model provides a kind of sealing brush and rotary regenerative air preheater that is used for rotary regenerative air preheater; The intensity of sealing brush is big, fatigue resistance is better, service life is longer; Make that the inleakage of rotary regenerative air preheater is little, sealing effectiveness is better.
To achieve these goals; The one side of the utility model provides a kind of sealing brush that is used for rotary regenerative air preheater; The clamping element that sealing brush comprises brush body, is fixed on the bristle on the said brush body and is arranged on said brush body both sides, said bristle comprise many brush silks, and an end of said many brush silks is fixed together and forms pencil and between said clamping element, extend; Wherein, every brush filate becomes helical form.
Preferably, the length of said brush silk is 90mm～140mm.
Preferably, the diameter of said brush silk is 0.2mm～0.4mm.
Preferably, said brush silk is made of metal.
Preferably, said brush silk is processed by stainless steel.
Preferably, be provided with multi beam brush silk between the said clamping element.
The utility model a kind of rotary regenerative air preheater is provided on the other hand; This rotary regenerative air preheater comprises shell, be arranged on rotating cylinder in the said shell, be fixedly installed on the fanning strip and the sealing device of said rotating cylinder above and below symmetrically; The inside of said rotating cylinder has been disposed radially polylith storehouse dividing plate; Said sealing device comprises that the top of the dividing plate along said storehouse and/or the radial seal that bottom is provided with are brushed, the circumferential seal brush of the circumferential setting of the outer peripheral face of the said rotating cylinder of axial seal brush and edge of the axial setting of the outer peripheral face of the said rotating cylinder in edge; Wherein, at least one in said radial seal brush, axial seal brush and the circumferential seal brush is sealing brush recited above.
Preferably, said sealing device comprises fixture, and said radial seal brush, axial seal brush and circumferential seal brush are installed on said storehouse dividing plate and the said rotating cylinder through said fixture respectively.
Preferably, said fixture is leg-of-mutton steel plate.
Through technique scheme, the brush silk can form helical form through technologies such as coilings, thereby the receive force intensity and the structural strength of brush silk are greatly improved.Therefore, in the rotary regenerative air preheater operation process, sealing brush is through fanning strip and blast wandering when interval, and bristle contact with other parts and seals and receive resistance, and its toughness is better, and fatigue resistance is higher, is difficult for generation and brushes a breaking releasing.Therefore, improved the service life of sealing brush, made the inleakage of rotary regenerative air preheater reduce, sealing effectiveness improves.
Other feature and advantage of the utility model will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of specification, is used to explain the utility model with the following specific embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the structure chart of the sealing brush that is used for rotary regenerative air preheater of the utility model;
Fig. 2 is the scheme of installation that the radial seal of the rotary regenerative air preheater of the utility model is brushed;
Fig. 3 is the scheme of installation that the circumferential seal of the rotary regenerative air preheater of the utility model is brushed;
Fig. 4 is the stereogram of the rotary regenerative air preheater of the utility model; And
Fig. 5 is the half sectional view of the rotary regenerative air preheater of the utility model.
Description of reference numerals
1 brush body, 2 bristles
3 brush silks, 4 clamping elements
10 shells, 20 rotating cylinders
30 fanning strips, 40 sealing devices
42 axial seals brush is brushed in 41 radial seals
43 circumferential seals are brushed 44 fixtures
50 storehouse dividing plates
The specific embodiment
Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model.Should be understood that the specific embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
Shown in Fig. 1-3; The one side of the utility model provides a kind of sealing brush that is used for rotary regenerative air preheater; The clamping element 4 that the sealing brush comprises brush body 1, is fixed on the bristle 2 on the said brush body 1 and is arranged on said brush body 1 both sides, said bristle 2 comprise that many are brushed silk 3, and an end of said many brush silks 3 is fixed together and forms pencil and extension between said clamping element 4; Wherein, at least one free end of said clamping element 4 is bandy arc.
Because the end of clamping element 4 forms bandy arc, can be an end or two ends, also can be the arc of any radius, shape, thereby the shape of the end of clamping element 4 be relatively slicker and more sly.In the rotating cylinder rotating process, the bristle 2 of sealing brush contact and receives resistance with other parts, thereby brush silk 3 bends and contact with 4 of clamping elements, thereby is difficult for being worn, and it is concentrated can not produce stress in the brush threads 3.Simultaneously, can prevent that brush silk 3 amount of bow are excessive and rupture, make prolong the service life of sealing brush, and then make that the inleakage of rotary regenerative air preheater is little that sealing effectiveness is better.
As shown in Figure 1, in order to guarantee the intensity of clamping element 4, preferably, said clamping element 4 is processed by steel plate.Certainly, clamping element 4 also is not limited to steel plate, as long as have certain structural strength and can brush body 1 firmly be fixed on the material between the clamping element 4.
As shown in Figure 1, for convenient be connected clamping element 4 and brush body 1 securely, preferably, said clamping element 4 and said brush body 1 are connected through securing member.Securing member can adopt various bolts, screw etc., makes clamping element 4 can brush body 1 be clamped between them.Clamping element 4 is set to be positioned at two boards shape spare and the length of brush body 1 both sides usually greater than brush body 1, thereby the bending direction and the bending position of restriction bristle 2 avoid brush silk 3 impaired.
In order to improve the force intensity that receives of brush silk 3, as shown in Figure 1, preferably, said brush silk 3 forms helical form.Brush silk 3 can form helical form through technologies such as coilings, thereby the receive force intensity and the structural strength of brush silk 3 are greatly improved.Therefore, in the rotary regenerative air preheater operation process, sealing brush is through fanning strip 30 and blast wandering when interval, and bristle 2 contact with other parts and seals and receive resistance, and its toughness is better, and fatigue resistance is higher, is difficult for producing brushing 3 breaking releasing.Therefore, improved the service life of sealing brush, made the inleakage of rotary regenerative air preheater reduce, sealing effectiveness improves.
For the further intensity and enhancing sealing effectiveness that improves brush silk 3, preferably, the length of said brush silk 3 is 90mm～140mm.Different according to the seal clearance of radial seal brush 41, axial seal brush 42 and circumferential seal brush 43 are adopted the brush silk 3 of different length to adapt with it, thereby are reached better sealing effectiveness.But the 3 oversize meetings of brush silk cause its intensity to reduce easy deformation; If the length of bristle is shorter, sealing effectiveness is better relatively, and also improve the service life of sealing brush; But when the air preheater heavy-duty service, because the reducing of seal clearance, bristle 2 flexible less; Resistance is bigger when causing the air preheater running, seriously can cause bite.Therefore, adopt the brush silk 3 of 90mm～140mm both to guarantee intensity, the smooth operation of better seal effect and air preheater is arranged again.
For the further intensity and enhancing sealing effectiveness that improves brush silk 3, preferably, the diameter of said brush silk 3 is 0.2mm～0.4mm.When brush silk 3 diameters are big, cause the air preheater running resistance to increase easily; When brush silk 3 diameters hour, 3 pairs of bendings of brush silk, cold and hot difference variation are responsive, brush silk 3 is easy to generate permanent deformation, is unfavorable for its use.Simultaneously, sweep down in the wind of bigger pressure differential, cause discrete and excessive deformation easily, these all can cause brushing the performance change of silk 3 and cause the sealing effectiveness variation.
Brush the manufacturing of silk 3 for ease and improve himself intensity, preferably, said brush silk 3 is made of metal.It is thread that brush silk 3 can adopt technology such as wire drawing to form, and forms helical form through reeling again, adopts made brush silk 3, made things convenient for the moulding and the manufacturing of brush silk 3, and metal self intensity is also bigger, makes that the structural strength of brush threads 3 is bigger.
In a kind of embodiment of the utility model, preferably, said brush silk 3 is processed by stainless steel.Brush silk 3 adopts the stainless steel manufacturing, has both satisfied its requirement of strength, can prevent that again brush silk 3 is corroded, and prolongs the service time of sealing brush.
In order further to improve sealing effectiveness, as shown in Figure 1, preferably, be provided with multi beam brush silk 3 between the said clamping element 4.Two bundle brush silks 3 for being arranged side by side shown in Fig. 1 form the double-layer seal face, thereby improve the sealing effectiveness of sealing brush.
Like Fig. 4 and shown in Figure 5; The utility model a kind of rotary regenerative air preheater is provided on the other hand; This rotary regenerative air preheater comprises shell 10, be arranged on rotating cylinder 20 in the said shell 10, be fixedly installed on the fanning strip 30 and the sealing device 40 of said rotating cylinder 20 above and belows symmetrically; The inside of said rotating cylinder 20 has been disposed radially polylith storehouse dividing plate 50; Said sealing device 40 comprises along the top of said storehouse dividing plate 50 and/or the following radial seal brush 41 that is provided with, along the axial seal brush 42 of the axial setting of the outer peripheral face of said rotating cylinder 20 and along the circumferential seal brush 43 of the circumferential setting of the outer peripheral face of said rotating cylinder 20; Wherein, at least one in said radial seal brush 41, axial seal brush 42 and the circumferential seal brush 43 be that sealing recited above is brushed.
In the process of air preheater running, between rotating cylinder 20 and the fanning strip 30, all can have seal clearance between rotating cylinder 20 and the shell 10, thereby radial seal brush 41, axial seal brush 42 and circumferential seal brush 43 are set it is sealed.Wherein, any one among the three or the two, perhaps the three all can adopt the sealing brush of the embodiment of the utility model, thereby improves sealing effectiveness, reduces inleakage, and then improves the heat exchange efficiency of air preheater.
Because in rotating cylinder 20 rotating process, the sealing brush can contact with other parts and bend, and is as shown in Figure 2, preferably, one of them free end of the clamping element 4 of said sealing brush is set to towards the direction opposite with the direction of rotation of said rotating cylinder 20 crooked.Thereby the bristle 2 of sealing brush can be along the bending direction of clamping element 4 ends and bending, avoids brush silk 3 amount of bow excessive and produce stress and concentrate, and prevents that brush threads 3 is impaired.Especially, radial seal brush 41 adopts above-mentioned mode to install, and axial seal brush 42 also can be provided with circumferential seal brush 43 so certainly.
As shown in Figure 5; The installation and the setting of sealing brush for ease; Preferably, said sealing device 40 comprises fixture 44, and said radial seal brush 41, axial seal brush 42 and circumferential seal brush 43 are installed on said storehouse dividing plate 50 and the said rotating cylinder 20 through said fixture 44 respectively.Can easily radial seal brush 41, axial seal brush 42 and circumferential seal brush 43 be fixed on storehouse dividing plate 50 and the rotating cylinder 20 through fixture 44, and guarantee sealing brush mounting stability.Certainly, can adopt variety of way to install, for example rivet, weld and be threaded etc.
As shown in Figures 2 and 3, preferably, said fixture 44 is leg-of-mutton steel plate.To seal brush through fixture 44 and directly be welded on storehouse dividing plate 50 and the rotating cylinder 20, guarantee the firm of connection, and easy to operate.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned embodiment; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technical scheme of the utility model, these simple variant all belong to the protection domain of the utility model.
Need to prove in addition; Each concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner; For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various embodiment of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (9)
1. a sealing that is used for rotary regenerative air preheater is brushed; The clamping element (4) that the sealing brush comprises brush body (1), is fixed on the bristle (2) on the said brush body (1) and is arranged on said brush body (1) both sides; Said bristle (2) comprises many brush silks (3); One end of said many brush silks (3) is fixed together and forms pencil and extension between said clamping element (4), it is characterized in that every brush silk (3) forms helical form.
2. the sealing brush that is used for rotary regenerative air preheater according to claim 1 is characterized in that the length of said brush silk (3) is 90mm～140mm.
3. the sealing brush that is used for rotary regenerative air preheater according to claim 1 and 2 is characterized in that the diameter of said brush silk (3) is 0.2mm～0.4mm.
4. the sealing brush that is used for rotary regenerative air preheater according to claim 1 is characterized in that said brush silk (3) is made of metal.
5. the sealing brush that is used for rotary regenerative air preheater according to claim 4 is characterized in that said brush silk (3) is processed by stainless steel.
6. the sealing brush that is used for rotary regenerative air preheater according to claim 1 is characterized in that, is provided with multi beam brush silk (3) between the said clamping element (4).
7. rotary regenerative air preheater; This rotary regenerative air preheater comprises shell (10), be arranged on rotating cylinder (20) in the said shell (10), be fixedly installed on the fanning strip (30) and the sealing device (40) of said rotating cylinder (20) above and below symmetrically; The inside of said rotating cylinder (20) has been disposed radially polylith storehouse dividing plate (50); The circumferential seal brush (43) of the circumferential setting of the axial seal brush (42) of the axial setting of the radial seal brush (41) that said sealing device (40) comprises along the top of said storehouse dividing plate (50) and/or bottom is provided with, the outer peripheral face of the said rotating cylinder in edge (20) and the outer peripheral face of the said rotating cylinder in edge (20); It is characterized in that at least one in said radial seal brush (41), axial seal brush (42) and the circumferential seal brush (43) is according to any described sealing brush among the claim 1-6.
8. rotary regenerative air preheater according to claim 7; It is characterized in that; Said sealing device (40) comprises fixture (44), and said radial seal brush (41), axial seal brush (42) and circumferential seal brush (43) are installed on said storehouse dividing plate (50) and the said rotating cylinder (20) through said fixture (44) respectively.
9. rotary regenerative air preheater according to claim 8 is characterized in that, said fixture (44) is leg-of-mutton steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200580183U CN202546806U (en) | 2012-02-20 | 2012-02-20 | Seal brush used in rotary air preheater and rotary air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200580183U CN202546806U (en) | 2012-02-20 | 2012-02-20 | Seal brush used in rotary air preheater and rotary air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202546806U true CN202546806U (en) | 2012-11-21 |
Family
ID=47167430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200580183U Expired - Lifetime CN202546806U (en) | 2012-02-20 | 2012-02-20 | Seal brush used in rotary air preheater and rotary air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202546806U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791492A (en) * | 2015-05-07 | 2015-07-22 | 四川东能节能技术有限公司 | Air preheater and cold-end radial or axial sealing device of same |
| CN109899526A (en) * | 2019-04-11 | 2019-06-18 | 广州市挂绿环保工程有限公司 | A kind of rotary sealing structure |
-
2012
- 2012-02-20 CN CN2012200580183U patent/CN202546806U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791492A (en) * | 2015-05-07 | 2015-07-22 | 四川东能节能技术有限公司 | Air preheater and cold-end radial or axial sealing device of same |
| CN109899526A (en) * | 2019-04-11 | 2019-06-18 | 广州市挂绿环保工程有限公司 | A kind of rotary sealing structure |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |