CN211903863U - Rotary gas-gas heat exchanger - Google Patents
Rotary gas-gas heat exchanger Download PDFInfo
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- CN211903863U CN211903863U CN202020167749.6U CN202020167749U CN211903863U CN 211903863 U CN211903863 U CN 211903863U CN 202020167749 U CN202020167749 U CN 202020167749U CN 211903863 U CN211903863 U CN 211903863U
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Abstract
The utility model provides a rotary gas-gas heat exchanger, which comprises a cylinder body which can rotate along with a shaft and stator structures which are arranged at the upper end and the lower end of the cylinder body; the barrel comprises a central barrel and an outer barrel which are coaxially arranged, the central barrel and the outer barrel are fixedly connected through a plurality of radial partition plates which are arranged at intervals, and a heat exchange element module is arranged in a space which is defined by the central barrel, the outer barrel and the radial partition plates; the stator structure comprises an inner ring matched with the central cylinder, an outer ring matched with the outer cylinder and a fan-shaped flexible sealing plate connected with the inner ring and the outer ring, and when the stator structure is connected to the end face of the cylinder in a matched mode, the fan-shaped flexible sealing plate and the end face of the radial partition plate are sealed in a dynamic contact mode. The utility model discloses rotation gas-gas heat exchanger's air leakage rate is low, and heat transfer capacity is excellent, and simple structure need not maintain long service life to it basically at the operation stage.
Description
Technical Field
The utility model relates to a indirect heating equipment, concretely relates to rotation gas-gas heat exchanger.
Background
The rotary gas-gas heat exchanger mainly comprises an outer shell and a rotor positioned in the outer shell, and is widely applied to a coal burner unit system of a thermal power plant as energy storage type heat exchange equipment. Common rotary gas-gas heat exchangers include rotary air preheaters, such as the rotary air preheater disclosed in CN1308644C, in which the sealing means comprises contact sealing means mounted between the upper and lower edges of each radial partition and the sector plate; a rotary air preheater as disclosed in CN100535573C, comprising a rotating drum rotating around a central axis, wherein the rotating drum is provided with a plurality of radial compartment partitions, the rotating drum is externally sleeved with a preheater fixing housing, sector plates are symmetrically arranged along the radial direction and the lower direction of the rotating drum, the rotating drum is arranged between the fixing housing and the central drum, and a sealing device is arranged between the rotating drum and the fixing housing, wherein the sealing device is a radial seal between each radial compartment partition of the rotating drum and the sector plate, an axial seal between the outer edge of the rotating drum and the fixing housing, and a circumferential seal between the outer circumference of the rotating drum and the fixing housing is a brush seal.
Because a certain gap exists between the rotor and the shell of the rotary type gas-gas heat exchanger, and fluid pressure difference, temperature difference and flow rate difference exist between the chambers on the cold air side and the hot air side of the rotary type gas-gas heat exchanger, fluid leaks between different chambers, namely what is called air leakage. The air leakage rate is used as a key index for measuring the technical level of the rotary air-gas heat exchanger, and how to control the air leakage rate of the rotary air-gas heat exchanger is one of the hot spots of research in the field. Although there is a disclosure of using an elastic contact type sealing device to compensate for a leakage gap to reduce the leakage rate, it is necessary to adjust the amount of compensation every time it is used, especially when the amount of compensation is insufficient after a long time use, which may result in a failure of the seal.
In addition, the existing rotary gas-gas heat exchanger has low heat exchange capacity, is easy to be blocked in the operation process, needs to be maintained frequently, and needs to be optimized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rotation gas-gas heat exchanger that the rate of leaking out is low and need not basically maintain.
In order to achieve the above purpose, the present invention adopts the following technical solution.
A rotary gas-gas heat exchanger comprises a cylinder body which can rotate along with a shaft and stator structures which are arranged at the upper end and the lower end of the cylinder body; the barrel comprises a central barrel and an outer barrel which are coaxially arranged, the central barrel and the outer barrel are fixedly connected through a plurality of radial partition plates which are arranged at intervals, and a heat exchange element module is arranged in a space which is defined by the central barrel, the outer barrel and the radial partition plates; the stator structure comprises an inner ring matched with the central cylinder, an outer ring matched with the outer cylinder and a fan-shaped flexible sealing plate connected with the inner ring and the outer ring, and when the stator structure is connected to the end face of the cylinder in a matched mode, the fan-shaped flexible sealing plate and the end face of the radial partition plate are sealed in a dynamic contact mode.
In order to further reduce the air leakage rate of the rotary type gas-gas heat exchanger, the inner side wall of the inner ring and the outer side wall of the outer ring are respectively provided with a sealing ring for sealing a dynamic sealing surface and a static sealing surface.
In order to further reduce the air leakage rate of the rotary air-gas heat exchanger, the stator structure positioned below the cylinder further comprises a supporting rod, one end of the supporting rod is connected with the outer wall of the inner ring, the other end of the supporting rod is connected with the inner wall of the outer ring, and the supporting rod radially abuts against the fan-shaped flexible sealing plate below the cylinder after the stator structure below the cylinder is connected to the lower end face of the cylinder in a matched mode.
Preferably, the support rod is made of a material having a flexible bending property following the downward synchronous deformation of the cylinder.
In order to facilitate the installation and improve the safety performance of the rotary gas-gas heat exchanger, one or more layers of net-shaped supporting pieces are arranged between the central cylinder and the outer cylinder and used for supporting the heat exchange element module.
In order to improve the heat exchange capacity of the rotary gas-gas heat exchanger, the heat exchange element module comprises a plurality of layers of three-dimensional fin heat exchange plates which are arranged in a stacked mode, and the tops of fins of the three-dimensional fin heat exchange plates abut against rib-free plate surfaces of the three-dimensional fin heat exchange plates adjacent to the fin-free plate.
In order to further improve the heat exchange capability of the rotary type gas-gas heat exchanger, the three-dimensional fin heat exchange plate comprises a base plate and fins which are integrally formed with the base plate, and the positions of the three-dimensional fin heat exchange plate before the fins are formed are through holes after the fins are formed.
Preferably, the stator structure is connected with the heat exchange medium inlet and outlet through an expansion joint.
Further, rotation gas-gas heat exchanger still includes transmission structure, and transmission structure is provided with bearing frame and gear pair including connecting the pivot at the drive arrangement output in the cooperation in the pivot, and the gear pair is located the bearing frame top, and the bearing frame passes through the bearing and connects the pivot, is provided with aligning thrust bearing on the bearing frame, and aligning thrust bearing upper end supports and leans on the inboard annular boss of center section of thick bamboo, and annular boss is connected in the cooperation of gear pair. The structure can also improve the stability and the safety of the rotary gas-gas heat exchanger in the operation process.
In order to further facilitate the installation, the disassembly and the maintenance of the rotary gas-gas heat exchanger, a channel for radially plugging and extracting the heat exchange element module is arranged on the outer cylinder, and a sealing door is arranged at the channel in a matching way.
The utility model discloses following beneficial effect has.
The rotary gas-gas heat exchanger of the utility model has the capability of automatically adjusting the sealing degree along with the deformation of the cylinder body in the operation process, to ensure the effective sealing of the rotary gas-gas heat exchanger, on one hand, the stator structure at the upper part of the cylinder compresses the upper end surfaces of the cylinder and the radial partition plates by the self weight and can move along with the downward deformation of the cylinder, on the other hand, a support rod of the stator structure at the lower part of the cylinder body is arranged between the inner ring and the outer ring and is abutted against the fan-shaped flexible sealing plate, the support rod provides pressing force to keep the sealing surface of the stator structure at the lower part in contact with the cylinder body and the lower end face of the radial partition plate to form dynamic contact sealing, and the support rod can be deformed downwards along with the cylinder body to generate corresponding flexible bending so as to ensure the pressing force required by the dynamic contact sealing.
Due to the adoption of the technical scheme, the air leakage rate of the rotary type gas-gas heat exchanger can be controlled within 1 percent; the utility model discloses an unconventional design has left out parts such as shell, rotor terminal surface baffle, rotor circumference closing plate of ordinary rotation gas heat exchanger, not only makes the structure of this rotation gas heat exchanger simplified by a wide margin, can avoid it to be died because of the mushroom-shaped warp in operation process moreover by card, need not maintain long service life to it basically at the operation stage.
Compare in current ordinary rotation gas heat exchanger (under the condition of equal heat transfer plate thickness and surface area), the utility model discloses rotation gas heat exchanger's heat transfer coefficient can improve more than 50%, and thermal capacity can improve more than 20%. The utility model discloses rotation gas heat exchanger still has stability excellent, and the security performance is good, be convenient for install, dismantle and advantage such as maintenance.
Drawings
FIG. 1 is a schematic axial section of a rotary gas-gas heat exchanger in an embodiment;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a first schematic view (without transmission structure) of the rotary gas-gas heat exchanger in the embodiment;
FIG. 4 is a schematic diagram II (without transmission structure) of the rotary gas-gas heat exchanger in the embodiment;
fig. 5 is a schematic radial section view of the rotary gas-gas heat exchanger in the embodiment (without heat exchange element module and transmission structure).
Fig. 6 is a partial schematic view of a three-dimensional fin heat exchange plate of a heat exchange element module of the rotary gas-gas heat exchanger in the embodiment.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following description of the embodiments is only for the purpose of helping understanding the principle and the core idea of the present invention, and is not intended to limit the scope of the present invention. It should be noted that modifications to the present invention may occur to those skilled in the art without departing from the principles of the present invention and are intended to fall within the scope of the appended claims.
Example 1
As shown in fig. 1 to 5, a rotary gas-gas heat exchanger includes a cylinder body rotatable with a shaft and stator structures disposed at upper and lower ends of the cylinder body; the tube body comprises a central tube 1 and an outer tube 8 which are coaxially arranged, the central tube 1 and the outer tube 8 are fixedly connected through a plurality of radial partition plates 20 which are arranged at intervals, and a heat exchange element module 5 is arranged in a space which is defined by the central tube 1, the outer tube 8 and the radial partition plates 20; the stator structure comprises an inner ring matched with the central cylinder 1, an outer ring matched with the outer cylinder 8 and a fan-shaped flexible sealing plate connected with the inner ring and the outer ring, and when the stator structure is connected to the end face of the cylinder in a matching manner, the fan-shaped flexible sealing plate and the end face of the radial partition plate 20 are sealed in a dynamic contact manner. The number of radial partitions 20 is designed by those skilled in the art according to the requirement, and it is desirable to design 72 partitions, so that the deformation degree of the rotary gas-gas heat exchanger can be obviously reduced. In this embodiment, the central cylinder 1, the outer cylinder 8 and the radial partition plate 20 are all welded, and the inner ring, the outer ring and the fan-shaped flexible sealing plate are also all welded.
As shown in fig. 1, the stator structure above the cylinder comprises an inner ring 3 matched with the central cylinder 1, an outer ring 6 matched with the outer cylinder 8, and a fan-shaped flexible sealing plate 4 connecting the inner ring 3 and the outer ring 6, and after the stator structure is connected to the upper end surface of the cylinder in a matching manner, the fan-shaped flexible sealing plate 4 and the upper end surface of the radial partition plate 20 are sealed in a dynamic contact manner; the stator structure below the cylinder comprises an inner ring 22 matched with the central cylinder 1, an outer ring 13 matched with the outer cylinder 8 and a fan-shaped flexible sealing plate 11 for connecting the inner ring 22 and the outer ring 13, and when the stator structure is connected to the lower end face of the cylinder in a matching manner, the lower end face of the fan-shaped flexible sealing plate 11 and the lower end face of the radial partition plate 20 are sealed in a dynamic contact manner.
In order to further reduce the air leakage rate of the rotary type gas-gas heat exchanger, the inner side wall of the inner ring and the outer side wall of the outer ring are respectively provided with a sealing ring for sealing a dynamic and static sealing surface, and the dynamic and static sealing surface refers to a sealing surface at the connecting part of the stator structure and the cylinder body. Specifically, as shown in fig. 1 and 2, the inner side wall of the inner ring 3 located above the cylinder body is provided with a sealing ring 2 for sealing the dynamic and static sealing surfaces, the outer side wall of the outer ring 6 located above the cylinder body is provided with a sealing ring 7 for sealing the dynamic and static sealing surfaces, the inner side wall of the inner ring 22 located below the cylinder body is provided with a sealing ring 14 for sealing the dynamic and static sealing surfaces, and the outer side wall of the outer ring 13 located below the cylinder body is provided with a sealing ring 10 for sealing the dynamic and static sealing surfaces.
In order to further reduce the air leakage rate of the rotary air-gas heat exchanger, the stator structure positioned below the cylinder further comprises a support rod 12, one end of the support rod 12 is connected with the outer wall of the inner ring 22, the other end of the support rod is connected with the inner wall of the outer ring 13, and when the stator structure below the cylinder is connected to the lower end face of the cylinder in a matching manner, the support rod 12 radially abuts against the fan-shaped flexible sealing plate 11 below the cylinder. In this embodiment, the support rod 12 is made of a material having a flexible bending property following the downward synchronous deformation of the cylinder, for example, a steel tube.
In order to facilitate the installation and improve the safety performance of the rotary gas-gas heat exchanger, one or more layers of net-shaped supporting pieces 9 are arranged between the central cylinder 1 and the outer cylinder 8 and used for supporting the heat exchange element modules 5. The number of layers of the mesh-shaped support member 9 may be one layer, two layers, or three layers, and when two layers are provided, the mesh-shaped support member can be divided into three layers of heat exchange element modules 5, namely an upper layer heat exchange element module, a middle layer heat exchange element module, and a lower layer heat exchange element module.
In order to improve the heat exchange capability of the rotary air-gas heat exchanger, in this embodiment, as shown in fig. 6, the heat exchange element module 5 includes a plurality of three-dimensional fin heat exchange plates stacked in multiple layers, and tops of the fins 52 of the three-dimensional fin heat exchange plates abut against non-fin surfaces of adjacent three-dimensional fin heat exchange plates, that is, the fins 52 of all adjacent three-dimensional fin heat exchange plates are stacked after being arranged in the same direction. The three-dimensional fin heat exchange plate comprises a base plate 51 and fins 52 integrally formed with the base plate 51, wherein the positions of the fins 52 before forming are through holes 53 after the fins 52 are formed. When manufacturing, the base plate 51 may be directly slit and then punched to form the desired fins, and the three-dimensional fin heat exchanger plate shown in fig. 5 has fins 52 at both ends of the same through hole 53.
In the actual application process, the stator structure is connected with the heat exchange medium inlet and outlet through the expansion joint, and the structure and the connection mode can also enable the heat exchange system to adapt to the deformation of the rotary gas-gas heat exchanger.
In this embodiment, rotation gas-gas heat exchanger still includes transmission structure, and transmission structure is provided with bearing frame 16 and gear pair 19 including connecting the pivot 17 at the drive arrangement output in the cooperation on pivot 17, and gear pair 19 is located bearing frame 16 top, and bearing frame 16 passes through bearing connection pivot 17, is provided with self-aligning thrust bearing 15 on bearing frame 16, and self-aligning thrust bearing 15 upper end supports and leans on the inboard annular boss 21 of a central section of thick bamboo 1, and annular boss 21 is connected in the cooperation of gear pair 19. In the operation process, the self-aligning thrust bearing 15 bears all loads, the rotating shaft 17 drives the gear pair 19 to rotate, and then the central cylinder 1 (the annular boss 21 is a part of the central cylinder 1), the outer cylinder 8 and the heat exchange element module 5 are driven to synchronously rotate, and the structure can also improve the stability and the safety of the rotary gas-gas heat exchanger in the operation process.
In the present embodiment, the rotary gas-gas heat exchanger has the capability of automatically adjusting the sealing degree along with the deformation of the cylinder during operation, so as to ensure the effective sealing of the rotary gas-gas heat exchanger, on one hand, the stator structure on the upper part of the cylinder presses the upper end surfaces of the cylinder and the radial partition 20 by its own weight (the weight of the stator structure on the upper part of the cylinder can also be increased by adding a counterweight to the fan-shaped flexible sealing plate 4), and can move along with the downward deformation of the cylinder (the deformation mainly refers to the mushroom-shaped deformation of the cylinder and the heat exchange element module 5 as a whole, the same applies below) to ensure that the sealing surface of the stator structure on the upper part keeps contact with the upper end surfaces of the cylinder and the radial partition 20, so as to form a dynamic contact seal, on the other hand, the support rod 12 of the stator structure on the lower part of the cylinder is arranged between the inner ring 21 and the outer ring 13 and abuts The support rod 12 can be correspondingly flexibly bent along with the downward deformation of the cylinder body by dynamic contact sealing, so that the pressing force required by the dynamic contact sealing is ensured. As described, the connection part of the cylinder and the stator structure in the operation process can be well sealed all the time, so that the air leakage rate is greatly reduced, and the air leakage rate of the rotary air-gas heat exchanger with the structure can be controlled within 1%.
The rotary gas-gas heat exchanger of the embodiment omits a shell, a rotor end face partition plate, a rotor circumferential sealing plate and other parts of a common rotary gas-gas heat exchanger, so that the structure of the rotary gas-gas heat exchanger is greatly simplified, the rotary gas-gas heat exchanger can be prevented from being blocked due to mushroom-shaped deformation in the operation process, the rotary gas-gas heat exchanger does not need to be maintained basically in the operation stage, and the service life is long.
Compared with the existing common rotary gas-gas heat exchanger (under the condition of the same thickness and surface area of the heat exchange plates), the heat exchange coefficient of the rotary gas-gas heat exchanger in the embodiment can be improved by more than 50%, and the heat capacity can be improved by more than 20%. The safety device also has the advantages of excellent stability, good safety performance, convenience in installation, disassembly and maintenance and the like.
Example 2
A rotary gas-gas heat exchanger, referring to example 1, which is different from example 1 in that: a channel for the heat exchange element module 5 to be radially plugged in and pulled out is arranged on the outer cylinder 8, and a sealing door is arranged at the channel in a matching way. When the heat exchange element module 5 is installed, only the sealing door needs to be opened first, then the heat exchange element module 5 is horizontally inserted between the central barrel 1 and the outer barrel 8 and placed on the supporting rod 12, and then the sealing door is closed; when the rotary gas-gas heat exchanger needs to be replaced after being used for a long time, the sealing door only needs to be opened first, then the heat exchange element module to be replaced is drawn out and replaced by a new heat exchange element module, and then the sealing door is closed. The rotary gas-gas heat exchanger in the embodiment is more convenient for the heat exchange element module to enter and exit, and is convenient for installation and maintenance.
The rotary gas-gas heat exchanger in embodiment 1 or embodiment 2 can be directly used as a rotary air preheater for a coal-fired unit system of a thermal power plant, and can also be used in other occasions of gas-gas heat exchange.
Claims (10)
1. A rotary gas-gas heat exchanger is characterized in that: the device comprises a cylinder body which can rotate along with a shaft and stator structures which are arranged at the upper end and the lower end of the cylinder body; the tube body comprises a central tube (1) and an outer tube (8) which are coaxially arranged, the central tube (1) and the outer tube (8) are fixedly connected through a plurality of radial partition plates (20) which are arranged at intervals, and a heat exchange element module (5) is arranged in a space which is enclosed by the central tube (1), the outer tube (8) and the radial partition plates (20); the stator structure comprises an inner ring matched with the central cylinder (1), an outer ring matched with the outer cylinder (8) and a fan-shaped flexible sealing plate connected with the inner ring and the outer ring, and when the stator structure is connected to the end face of the cylinder in a matched mode, the fan-shaped flexible sealing plate and the end face of the radial partition plate (20) are sealed in a dynamic contact mode.
2. Rotary gas-gas heat exchanger according to claim 1, characterized in that: and the inner side wall of the inner ring and the outer side wall of the outer ring are respectively provided with a sealing ring for sealing a dynamic sealing surface and a static sealing surface.
3. Rotary gas-gas heat exchanger according to claim 2, characterized in that: the stator structure positioned below the cylinder body further comprises a supporting rod (12), one end of the supporting rod (12) is connected with the outer wall of the inner ring, the other end of the supporting rod is connected with the inner wall of the outer ring, and the supporting rod (12) radially abuts against the fan-shaped flexible sealing plate below the cylinder body after the stator structure below the cylinder body is connected to the lower end face of the cylinder body in a matched mode.
4. Rotary gas-gas heat exchanger according to claim 3, characterized in that: the support rod (12) is made of a material having a flexible bending property which follows the downward synchronous deformation of the cylinder.
5. Rotary gas-gas heat exchanger according to claim 4, characterized in that: one or more layers of net-shaped supporting pieces (9) are arranged between the central cylinder (1) and the outer cylinder (8) and used for supporting the heat exchange element modules (5).
6. Rotary gas-gas heat exchanger according to claim 5, characterized in that: the heat exchange element module (5) comprises a plurality of layers of three-dimensional fin heat exchange plates which are stacked, and the tops of fins (52) of the three-dimensional fin heat exchange plates are abutted against the non-fin surfaces of the three-dimensional fin heat exchange plates adjacent to the three-dimensional fin heat exchange plates.
7. Rotary gas-gas heat exchanger according to claim 6, characterized in that: the three-dimensional fin heat exchange plate comprises a base plate (51) and fins (52) integrally formed with the base plate (51), wherein the positions of the fins (52) before forming are through holes (53) after the fins (52) are formed.
8. Rotary gas-gas heat exchanger according to any of claims 1 to 7, wherein: the stator structure is connected with the heat exchange medium inlet and outlet through expansion joints.
9. Rotary gas-gas heat exchanger according to claim 8, characterized in that: the rotary gas-gas heat exchanger further comprises a transmission structure, the transmission structure comprises a rotating shaft (17) connected to the output end of the driving device, a bearing seat (16) and a gear pair (19) are arranged on the rotating shaft (17) in a matched mode, the gear pair (19) is located above the bearing seat (16), the bearing seat (16) is connected with the rotating shaft (17) through a bearing, a self-aligning thrust bearing (15) is arranged on the bearing seat (16), the upper end of the self-aligning thrust bearing (15) abuts against an annular boss (21) on the inner side of the central cylinder (1), and the gear pair (19) is connected with the annular boss (21).
10. Rotary gas-gas heat exchanger according to claim 9, characterized in that: a channel for the heat exchange element module (5) to be radially plugged in and pulled out is arranged on the outer cylinder (8), and a sealing door is arranged at the channel in a matching way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167749.6U CN211903863U (en) | 2020-02-13 | 2020-02-13 | Rotary gas-gas heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020167749.6U CN211903863U (en) | 2020-02-13 | 2020-02-13 | Rotary gas-gas heat exchanger |
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| CN211903863U true CN211903863U (en) | 2020-11-10 |
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| CN202020167749.6U Active CN211903863U (en) | 2020-02-13 | 2020-02-13 | Rotary gas-gas heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023029303A1 (en) * | 2021-08-30 | 2023-03-09 | 浙江兴核智拓科技有限公司 | Anti-blocking system and anti-blocking method based on split ring round-robin heating for rotary heat exchanger |
-
2020
- 2020-02-13 CN CN202020167749.6U patent/CN211903863U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023029303A1 (en) * | 2021-08-30 | 2023-03-09 | 浙江兴核智拓科技有限公司 | Anti-blocking system and anti-blocking method based on split ring round-robin heating for rotary heat exchanger |
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Effective date of registration: 20220706 Address after: 402460 building 15, No. 5, Chuangxin Avenue, Changzhou street, Rongchang District, Chongqing Patentee after: Chongqing Xinshun Shengda Technology Co.,Ltd. Address before: 402560 No.25 Longshan Avenue, Pulu street, Tongliang District, Chongqing Patentee before: Wang Jian |