CN102997275A - Rotary air preheater h-type sealing jacket - Google Patents
Rotary air preheater h-type sealing jacket Download PDFInfo
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- CN102997275A CN102997275A CN2012105133513A CN201210513351A CN102997275A CN 102997275 A CN102997275 A CN 102997275A CN 2012105133513 A CN2012105133513 A CN 2012105133513A CN 201210513351 A CN201210513351 A CN 201210513351A CN 102997275 A CN102997275 A CN 102997275A
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- preheater
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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 invention discloses a rotary air preheater h-type sealing jacket, a main body of which comprises two splints with heights of 300-350mm. The jacket is of a cantilever structure, one part of the jacket, which is close to the side of a center cylinder, is fixed with a rotor partitioning plate of a preheater, one part of the jacket, which is far away from the center cylinder, is suspended; medium-lower parts of two splints of a hot end jacket, which are far away from the center cylinder, are provided with reinforcing shockproof bolts; medium-upper parts of two splints of a cold end jacket, which are far away from the center cylinder, are provided with reinforcing shockproof bolts; a slide wire hole is arranged in the rotor partitioning plate, the shockproof bolts penetrate through the slide wire hole and can relatively displace in the slide wire hole; and square expanding holes are reserved in bottom surfaces of outer end faces of the splints of the hot end jacket, which is far away from the center cylinder, and square expanding holes are reserved in the tops of the outer end faces of the splints of the cold end jacket, which are far away from the center cylinder. According to the invention, the technical problems of low sealing reliability, low availability ratio, limited use range, short maintenance period and small operation range because air of an air duct of the preheater leaks into a flue in the existing sealing technology of the rotary air preheater are solved.
Description
Technical field
The present invention relates to a kind of sealing chuck, relate in particular to a kind of " h " type sealed jacket that in rotary regenerative air preheater, uses, belong to station boiler subsidiary engine equipment technical field.
Background technology
Rotary regenerative air heater leak out except carry leak out main existence radially leak out and axially leak out, wherein most of for radially leaking out, radially leak out mainly is because the air preheater rotor is heated in running, the inconsistent rotor generation mushroom deformation that causes of cold and hot end swell increment, rotor end-face and fanning strip gap increase, and cause and leak out.
The Sealing Technology that the radial seal of current power industry station boiler rotary regenerative air preheater is adopted mainly contains: automatic sealing device system, fixed sealing and soft seal.Wherein: the automatic sealing device system adopts and automatically detects the distance of following the tracks of fanning strip and rotor housing, the mode of adjusting the fanning strip position seals, this mode is subject to the reliability of electronic system and adjusting device under the high temperature, makes whole device be difficult to reliably and with long-term operation.The mode that fixed sealing adopts fixed sectors plate and preheater rotor end-face to seal in minimum range, this mode is difficult to guarantee the air leak rate of air curtain of preheater under underload.The mode that soft seal adopts spring to reply is adjusted the distance of sealing device and fanning strip, and this mode is subject to the impact in high temperature lower spring life-span, is difficult to long-time reliability service.
In sum, in rotary regenerative air preheater, air occurs and leaks toward flue in preheater air channel easily, reduce the accident of unit station service power consumption rate, and the air preheater Sealing Technology of current main-stream all exist sealing reliability lower, be difficult to reach the target inleakage, sealing property descends behind the long-play, the technical problem that breaks down easily, and current Sealing Technology mainly applies to the high load capacity stage of boiler, in, low load stage air preheater air leakage amount is difficult to guarantee more.
In a word, still there are the technical problems such as reliability is low, availability is low, the scope of application is limited, maintenance period is short in existing Sealing Technology, is badly in need of improving.
Summary of the invention
The object of the invention is to: the radially rotary regenerative air preheater of Air Leakage " h " type sealed jacket of a kind of effective solution is provided, solve and exist preheater air channel air to leak toward flue in the existing rotary regenerative air preheater Sealing Technology, sealing reliability is low, availability is low, the scope of application is limited, maintenance period is short, and use the technical problem of narrow range, thereby can effectively solve above-mentioned problems of the prior art.
The object of the invention realizes by following technical proposals:
A kind of rotary regenerative air preheater " h " type sealed jacket, comprise sealed jacket, sealed jacket is matched with central tube and preheater, described sealed jacket comprises hot junction chuck and cold junction chuck two parts, the main body of sealed jacket is that two tile heights are the clamping plate of 300-350mm, chuck is cantilever design, fixes near the chuck of central tube side and the rotor dividing plate of preheater, and is unsettled away from the central tube side; Chuck two clamping plate in hot junction are being established the shockproof bolt of reinforcing away from the middle and lower part of central tube side, cold junction chuck two clamping plate are being established the shockproof bolt of reinforcing away from the middle and upper part of central tube side; Open the slip hole on the rotor dividing plate, shockproof bolt passes this slip hole and therein relative displacement; The hot junction chuck is reserved square expansion hatch away from the bottom, clamping plate outer face of central tube end, and the cold junction chuck is reserved square expansion hatch away from the top, clamping plate outer face of central tube end; The place's subsides one of shockproof mouth and the rotor dividing plate of rotor dividing plate is the pasting board of " recessed " font structure, pasting board blocks expansion hatch and peripheral clamping plate thereof, the conventional diaphragm seal of a row is up paid on the top of hot junction clamping plate dorsad preheater fanning strip side, and the conventional diaphragm seal of a row is down paid in the bottom of cold junction clamping plate dorsad preheater fanning strip side; Between clamping plate and conventional diaphragm seal, paste a stiffener; Press from both sides bonding jumper between two clamping plate of hot junction chuck and conventional diaphragm seal link position.
As preferably, the clamping plate upper surface of hot junction chuck is vertical with the preheater central tube, and the lower surface of cold junction chuck clamping plate and preheater central tube are fixed angle 85 ~ 90 degree.
As preferably, described slip hole is a width of cloth or several, the shockproof bolt on the chuck and rotor dividing plate can be in the slip hole relative sliding.
As further preferred, described shockproof bolt is without the thick 2-3mm of thickness of the Length Ratio rotor dividing plate of threaded rod.
As preferably, clamping plate paste the welding steel plate at the end near the air preheater central tube, paste the welding steel plate and are fixed in by conventional bolt and lean on the rotor dividing plate of central tube.
As further preferred, conventional bolt is the arrangement fixed form of many row's multiple spots.
As preferably, the thick 2-3mm of thickness of the Thickness Ratio rotor dividing plate of described bonding jumper is bolted between described stiffener, conventional diaphragm seal and the bonding jumper.
Operation principle of the present invention is:
The present invention mainly utilizes chuck height weak point, has a narrow range of temperature, and without the characteristics of mushroom deformation, automatically repairs the gap of exposing because of the rotor mushroom deformation, reaches the purpose of sealing.The mushroom deformation of air preheater rotor can move freely, and energy relative sliding between rotor outer end and the chuck is mutually without impact; Simultaneously since chuck no matter under high temperature or low temperature, the temperature difference of its upper and lower side is all very little, therefore, the relative position of chuck and fanning strip all changes very littlely under high, medium and low load, can both guarantee to hang down air leak rate of air curtain.
Compared with prior art, beneficial effect of the present invention: the present invention possesses the principle of different swell incremenies according to chuck and preheater rotor dividing plate under the different temperature difference, the preheater seal clearance is repaired automatically, thereby reached purpose to the control of preheater inleakage; The sealing mode is leaked out less under high load capacity, sealing property can not descend behind long-play, reliability is higher, and in, have equally higher sealing property under the underload, day-to-day operation need not regulated, firm in structure, durable, not fragile, failure rate is low, and the regular maintenance amount is low, and availability is high, sealing property can not descend behind the long-play, can guarantee equally to have higher sealing property in the unit, under the underload.
Description of drawings
Fig. 1 is the main body clamping plate of hot junction chuck among the present invention and the schematic diagram of rotor dividing plate relative position;
Fig. 2 is the overlooking surface structural representation of Fig. 1;
Fig. 3 is the partial structurtes schematic diagram of hot junction chuck clamping plate central tube side;
Fig. 4 is the overlooking surface structural representation of Fig. 3;
Fig. 5 is the rotor radial outboard end partial schematic diagram of hot junction chuck clamping plate;
Fig. 6 is the overlooking surface schematic diagram of Fig. 5;
Fig. 7 is chuck clamping plate top, hot junction principal character schematic diagram;
Fig. 8 is the overlooking surface structural representation of Fig. 7;
Fig. 9 is the side structure schematic diagram of Fig. 7;
Figure 10 is this chuck cold junction sealed structural representation;
Figure 11 is the side structure schematic diagram of Figure 10;
Figure 12 is the structural representation before the cold and hot end chuck distortion;
Figure 13 is the structural representation after the cold and hot end chuck distortion.
Wherein: the rotor dividing plate of 1-clamping plate, 2-air preheater, 3-central tube, 4-paste welding steel plate, the conventional bolt of 5-, the shockproof bolt of 6-, 7-slip hole, 8-fanning strip, the square expansion hatch of 9-, the conventional diaphragm seal of 10-, 11-stiffener, 12-expansion hatch pasting board, 13-bonding jumper.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Disclosed all features in this specification, or the step in disclosed all methods or the process, except the speciality and/or step of mutual repulsion, all can make up by any way, unless special narration all can be replaced by other equivalences or the alternative features with similar purpose, namely, unless special narration, an embodiment in a series of equivalences of each feature or the similar characteristics.
Such as Fig. 1-shown in Figure 13, a kind of rotary regenerative air preheater " h " type sealed jacket, it comprises sealed jacket, and sealed jacket is matched with central tube and preheater, and the central tube of preheater and rotor dividing plate all interact with sealed jacket of the present invention.Described sealed jacket comprises hot junction chuck and cold junction chuck two parts, and concrete structure is as follows:
The main body of described sealed jacket is that two tile heights are the clamping plate 1 of 300-350mm, the height of 300-350mm and left and right sides scope can guarantee that the upper and lower side temperature difference of clamping plate is less, the height of boiler load no matter, the temperature difference of height clamping plate is less like this, its amount that mushroom deformation occurs can be ignored, thereby guarantee the gap width of rotor end-face and fanning strip, guarantee air leak rate of air curtain.Chuck is cantilever design, fixes near the chuck of central tube 3 sides and the rotor dividing plate of preheater, and is unsettled away from the central tube side.Described chuck be divided into " h " type preheater hot junction chuck and " h " the preheater cold junction chuck of type, the clamping plate upper surface of hot junction chuck is vertical with the preheater central tube, the lower surface of cold junction chuck clamping plate and preheater central tube are fixed angle 85 ~ 90 degree, chuck two clamping plate in hot junction use shockproof bolt establishing away from the middle and lower part of central tube side to reinforce, and cold junction chuck two clamping plate are being established reinforcing with shockproof bolt 6 away from the middle and upper part of central tube side.Described shockproof bolt 6 is without the thick 2-3mm of thickness of the Length Ratio rotor dividing plate 2 of threaded rod.Open slip hole 7 on the rotor dividing plate 2, shockproof bolt 6 passes slip hole 7, and therein relative displacement, the slip hole not only can be fixed two clamping plate, also can leave the gap for shockproof bolt slippage, the slip hole can to shockproof bolt carry out spacing, prevent the improper distortion of chuck and fanning strip bite.Described slip hole 7 is a width of cloth or several, and large diameter air preheater can adopt how secondary slip hole.The purpose that this shockproof bolt is set is to strengthen the rigidity of chuck bottom two clamping plate, weaken its vibrations, slip hole on the rotor dividing plate is designed according to the direction of displacement of rotor deformation, be advisable not hinder downward " normally " expansion displacement of rotor, consider simultaneously the position of the end in suitable setting slip hole, be out of shape to the fanning strip side to prevent that the clamping plate generation is uncertain, cause chuck and fanning strip stuck, the height of the conventional diaphragm seal of reference by location of the top of hot junction chuck and cold junction chuck bottom.
The hot junction chuck is reserved square expansion hatch 9 away from the bottom, clamping plate outer face of central tube end, and the cold junction chuck is reserved square expansion hatch away from the top, clamping plate outer face of central tube end, prevents clamping plate and rotor housing bite.Paste a pasting board on the rotor dividing plate at shockproof mouthful of place, be " recessed " font structure with the rotor dividing plate and block expansion hatch and peripheral clamping plate,
Clamping plate are unsettled form near the rotor radial outside one end, and whole unsettled levelness and weight are guaranteed by the set bolt of central tube end and supports.
The dividing plate of reserving the expansion hatch place, meet air preheater fanning strip 8 sides paste one prevent the rotor hot shaping after the expansion hatch pasting board 12 that reveals mouthful of expansion hatch; Expansion hatch pasting board 12 also can prevent from leaking out.The conventional diaphragm seal 10 of a row is up paid on the top of hot junction clamping plate dorsad preheater fanning strip side, the conventional diaphragm seal of a row is down paid on the top of cold junction clamping plate dorsad preheater fanning strip side, perpendicularity deviation was excessive when the purpose of sealing sheet was to prevent the rotor installation, and the then clamping plate of chuck and fanning strip direct friction or collision causes damage.
Between clamping plate 1 and conventional diaphragm seal 10, paste a stiffener 11, can prevent clamping plate deliquescing in hot environment.Sandwiched bonding jumper 13 between two clamping plate, 1 top of hot junction chuck and conventional diaphragm seal link position, the thick 2-3mm of thickness of the Thickness Ratio rotor dividing plate 2 of described bonding jumper 13, and be bolted between described stiffener 11, conventional diaphragm seal 10 and the bonding jumper 13.The purpose of this bonding jumper is to guarantee the rigidity on chuck top, prevents that simultaneously ash from entering between chuck and the rotor dividing plate, and bite occurs when causing relative displacement.Clamping plate 1 paste welding steel plate 4 at the end near the air preheater central tube, and subsides welding steel plate 4 is fixed in by conventional bolt 5 and leans on the rotor dividing plate 2 of central tube, and described conventional bolt 5 is the arrangement fixed forms of many row's multiple spots.Clamping plate adopt the form thickening of pasting the welding steel plate at the end near the central tube position, guarantee its intensity, then the mode by bolt is fixed near on near the dividing plate the central tube, the fixing fixing mode of many row's multiple spots that adopts of bolt, can the clamping plate of " FX " be lengthened in case of necessity, thus the intensity of assurance dividing plate.
At air preheater cold-end air: adopt the bolt row to be fixed between two clamping plate, eliminate the possibility that dust stratification stops up between clamping plate and the dividing plate; The angle of two clamping plates lower surface and central tube axle need to design according to the maximum deformation quantity of cold junction rotor; The position of bolt hole need to be designed according to the angle of clamping plate lower surface and central tube axle; The effect that the restriction chuck down can not be estimated improper displacement is played in the position of lower end, slip hole.Meeting the fanning strip side in the clamping plate outsides increases the conventional diaphragm seal of row, improves its rigidity by thickening these side clamping plate simultaneously, prevents the distortion that is distorted of its lower surface.
Whole clamping device comprises all nuts at hot and cold two ends, all needs to carry out spot welding and fix after installation adjustment is finished, and prevents that vibrations from coming off.
More than can effectively solve the radially Air Leakage of rotary regenerative air preheater, the problem that the perpendicularity deviation of installing as for rotor itself causes the gap to increase can be weakened by the mode of adjusting indivedual fanning strip outside height or be eliminated.
Purpose of the present invention is:
1) main purpose of the present invention is to intercept preheater air channel leaking out to flue;
2) reliability of lift-off seal device, expansion accommodation, minimizing operation, minimizing maintenance work.
Realize above-mentioned purpose, the present invention realizes by following structure:
1) chuck mainly is comprised of the clamping plate about two 300-350mm, thereon, the lower end temperature difference than in the circlet border without mushroom deformation, thereby behind rotor generation mushroom deformation, can automatically repair gap with fanning strip, reach the effect of sealing; The high, medium and low load lower plate temperature difference up and down is all less, and therefore, sealing device all has excellent sealing property under high, medium and low load; And because clamping plate are inactive parts, relatively static, day-to-day operation does not need to regulate, and has reduced operation, thermal technology personnel's workload.
2) bonding jumper: guaranteed the rigidity of chuck sealing device cantilever, made cantilever end can not guarantee the gap width of whole chuck sealing device and fanning strip owing to the frictional force of rotor dividing plate is excessive downward distortion occuring, guaranteed the performance of leaking out of preheater; Bonding jumper has reduced the possibility of the gap dust stratification between clamping plate and the dividing plate simultaneously, guarantees that rotor dividing plate and chuck clamping plate can be free to slide.
3) conventional diaphragm seal: the perpendicularity deviation that mainly prevents the rotor main shaft installation is excessive, thereby causes fanning strip and clamping plate direct collision or friction, and sealing device is played buffering and the effect of protecting, and improves the reliability of sealing device, reduces fault rate; Rotor is installed the problem of perpendicularity, can finely tune the fanning strip outer fix by the cold conditions test run and be controlled.
4) shockproof bolt and slip hole: mainly be the bottom of the hot junction chuck of strap, its vibrations of reduced stiffness of clamping plate are strengthened on the top of cold junction chuck, and allow the not relative sliding with the downward mushroom deformation of rotor dividing plate of clamping plate.The whole device of position assurance of top, slip hole, hot junction and bottom, cold junction slip hole can not occur uncertain to fanning strip side deformation displacement, and stuck situation occurs.
5) reinforcing of dividing plate, clamping plate central tube end is listed as fixing mode with many row's multiple spot bolts, mainly be to strengthen the intensity of dividing plate and clamping plate, the collision of frictional force, conventional diaphragm seal and fanning strip between opposing dividing plate and the clamping plate or frictional force, the weight of the whole sealing device of support, the levelness of assurance device guarantee that whole system is firm in structure, not fragile.
6) expansion hatch and expansion hatch pasting board: prevent that clamping plate and rotor urceolus are stuck, and guarantee to leak out.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. rotary regenerative air preheater " h " type sealed jacket, comprise sealed jacket, sealed jacket is matched with central tube and preheater, described sealed jacket comprises hot junction chuck and cold junction chuck two parts, it is characterized by: the main body of sealed jacket is that two tile heights are the clamping plate of 300-350mm, chuck is cantilever design, fixes near the chuck of central tube side and the rotor dividing plate of preheater, and is unsettled away from the central tube side; Chuck two clamping plate in hot junction are being established the shockproof bolt of reinforcing away from the middle and lower part of central tube side, cold junction chuck two clamping plate are being established the shockproof bolt of reinforcing away from the middle and upper part of central tube side; Open the slip hole on the rotor dividing plate, shockproof bolt passes this slip hole and therein relative displacement; The hot junction chuck is reserved square expansion hatch away from the bottom, clamping plate outer face of central tube end, and the cold junction chuck is reserved square expansion hatch away from the top, clamping plate outer face of central tube end; The place's subsides one of shockproof mouth and the rotor dividing plate of rotor dividing plate is the pasting board of " recessed " font structure, pasting board blocks expansion hatch and peripheral clamping plate thereof, the conventional diaphragm seal of a row is up paid on the top of hot junction clamping plate dorsad preheater fanning strip side, and the conventional diaphragm seal of a row is down paid in the bottom of cold junction clamping plate dorsad preheater fanning strip side; Between clamping plate and conventional diaphragm seal, paste a stiffener; Press from both sides bonding jumper between two clamping plate of hot junction chuck and conventional diaphragm seal link position.
2. rotary regenerative air preheater as claimed in claim 1 " h " type sealed jacket, it is characterized in that: the clamping plate upper surface of described hot junction chuck is vertical with the preheater central tube, and the lower surface of cold junction chuck clamping plate and preheater central tube are fixed angle 85 ~ 90 degree.
3. rotary regenerative air preheater as claimed in claim 2 " h " type sealed jacket is characterized in that: described slip hole is a width of cloth or several, the shockproof bolt on the chuck and rotor dividing plate can be in the slip hole relative sliding.
4. rotary regenerative air preheater as claimed in claim 3 " h " type sealed jacket, it is characterized in that: described shockproof bolt is without the thick 2-3mm of thickness of the Length Ratio rotor dividing plate of threaded rod.
5. rotary regenerative air preheater as claimed in claim 1 " h " type sealed jacket is characterized in that: clamping plate paste the welding steel plate at the end near the air preheater central tube, paste the welding steel plate and are fixed in by conventional bolt and lean on the rotor dividing plate of central tube.
6. rotary regenerative air preheater as claimed in claim 5 " h " type sealed jacket is characterized in that: conventional bolt is the arrangement fixed forms of many row's multiple spots.
7. rotary regenerative air preheater as claimed in claim 1 " h " type sealed jacket, it is characterized in that: the thick 2-3mm of thickness of the Thickness Ratio rotor dividing plate of described bonding jumper is bolted between described stiffener, conventional diaphragm seal and the bonding jumper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210513351.3A CN102997275B (en) | 2012-12-05 | 2012-12-05 | Rotary air preheater h-type sealing jacket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210513351.3A CN102997275B (en) | 2012-12-05 | 2012-12-05 | Rotary air preheater h-type sealing jacket |
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| Publication Number | Publication Date |
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| CN102997275A true CN102997275A (en) | 2013-03-27 |
| CN102997275B CN102997275B (en) | 2015-01-07 |
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| CN201210513351.3A Active CN102997275B (en) | 2012-12-05 | 2012-12-05 | Rotary air preheater h-type sealing jacket |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540274A (en) * | 1994-12-06 | 1996-07-30 | Abb Air Preheater, Inc. | Rotary regenerative heat exchanger |
| RU2099637C1 (en) * | 1995-07-21 | 1997-12-20 | Белорусский научно-исследовательский проектно-конструкторский энергетический институт "Белнипиэнергопром" | Radial seal for regenerative air heater |
| JPH10148487A (en) * | 1996-11-18 | 1998-06-02 | Abb Kk | Rotary regenerative heat exchanger |
| JP2000193386A (en) * | 1998-12-25 | 2000-07-14 | Kansai Electric Power Co Inc:The | Rotating reproduction heat exchanger |
| CN1598469A (en) * | 2004-09-04 | 2005-03-23 | 王卫东 | Spoke type sealing device for rotary air preheater |
| CN201811271U (en) * | 2010-09-10 | 2011-04-27 | 山东泓奥电力科技有限公司 | Elastic sealing device for rotary air preheater |
| CN202229223U (en) * | 2011-08-17 | 2012-05-23 | 北京慧峰仁和科技有限公司 | Rotary air preheater sealing device |
-
2012
- 2012-12-05 CN CN201210513351.3A patent/CN102997275B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540274A (en) * | 1994-12-06 | 1996-07-30 | Abb Air Preheater, Inc. | Rotary regenerative heat exchanger |
| RU2099637C1 (en) * | 1995-07-21 | 1997-12-20 | Белорусский научно-исследовательский проектно-конструкторский энергетический институт "Белнипиэнергопром" | Radial seal for regenerative air heater |
| JPH10148487A (en) * | 1996-11-18 | 1998-06-02 | Abb Kk | Rotary regenerative heat exchanger |
| JP2000193386A (en) * | 1998-12-25 | 2000-07-14 | Kansai Electric Power Co Inc:The | Rotating reproduction heat exchanger |
| CN1598469A (en) * | 2004-09-04 | 2005-03-23 | 王卫东 | Spoke type sealing device for rotary air preheater |
| CN201811271U (en) * | 2010-09-10 | 2011-04-27 | 山东泓奥电力科技有限公司 | Elastic sealing device for rotary air preheater |
| CN202229223U (en) * | 2011-08-17 | 2012-05-23 | 北京慧峰仁和科技有限公司 | Rotary air preheater sealing device |
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| CN102997275B (en) | 2015-01-07 |
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