Rotary air preheater

Abstract

The invention provides a rotary air preheater. The rotary air preheater comprises a shell, a main shaft, a rotor body and sector plates. The main shaft is connected with the shell, the rotor body is rotationally assembled on the main shaft, and the fan-shaped plates are symmetrically arranged in the shell and located in a gap between the shell and the rotor body; wherein the rotor body comprises a plurality of partition plates, sealing parts are arranged on the partition plates, and when the rotor body rotates in the shell along with the main shaft and the sealing parts pass through the sector plate area, the sealing parts make contact with the sector plates to form sealing. The rotor has the beneficial effects that the sealing part is installed on the rotor body, when the rotor rotates and passes through the sector plate, the sealing part makes contact with the sector plate to form a double-layer sealing structure, flue gas and air are prevented from flowing between a flue gas area and an air area through the gap, and therefore the radial air leakage rate is effectively reduced.

Description

Technical Field

[0001] This application belongs to the field of air preheater technology, specifically relating to a rotary air preheater. Background Technology

[0002] Existing rotary air preheaters generally suffer from high air leakage rates during actual operation. Air leakage not only significantly increases the power consumption of the boiler induced draft fan and reduces the unit's operating efficiency, but also disrupts the combustion conditions inside the boiler, and in severe cases, affects the safe and stable operation of the boiler. Radial air leakage is the most prominent of all types of air leakage, mainly caused by the assembly gap between the rotor partition plate and the sector plate. Airflow can easily pass through this gap and flow between the flue gas zone and the air zone. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To address the aforementioned problems, this application provides a rotary air preheater, comprising: a housing, a main shaft, a rotor body, and sector plates; the main shaft is connected to the housing, the rotor body is rotatably mounted on the main shaft, and the sector plates are symmetrically arranged within the housing and located in the gap between the housing and the rotor body; wherein, the rotor body includes multiple partition plates, and each partition plate is provided with a sealing portion; when the rotor body rotates within the housing with the main shaft and the sealing portion passes through the sector plate area, the sealing portion contacts the sector plate to form a seal.

[0005] Optionally, the sealing portion includes: A radial sealing plate is fixedly disposed on the first side of the partition plate and is used to contact and seal with the sector plate. A connecting component is fixedly disposed on the second side of the partition plate, the second side being disposed opposite to the first side. A sealing assembly is provided on the side of the connecting assembly away from the compartment plate, and a gap is reserved between the sealing assembly and the radial sealing plate.

[0006] Optionally, the sealing assembly includes: A connecting plate, which is fixedly connected to the connecting assembly; A sealing sheet is disposed on the side of the connecting plate facing the sector plate, for contacting and sealing with the sector plate; A support structure is provided on the connecting plate to support the connecting plate and the sealing sheet.

[0007] Optionally, the support structure includes: A bonding plate, which is fixedly disposed on the side of the connecting plate opposite to the connecting assembly; A support plate, the first end of which is fixedly connected to the bonding plate, and the second end of which extends toward the side away from the connecting plate.

[0008] Optionally, the connection component includes: A panel, the panel being fixedly disposed on the second side of the partition plate; A transverse plate, the transverse plate being disposed on the side of the insert away from the partition plate, and extending in a direction away from the partition plate; A sealing plate is disposed between the partition plate and the connecting plate, and the bottom of the sealing plate is fixed to the top of the insert plate and the transverse plate.

[0009] Optionally, it also includes a compression section; the housing is respectively provided with a flue gas inlet cylinder and an air outlet cylinder, the compression section is disposed between the flue gas inlet cylinder and the housing, the compression section is used to deform under heat after high temperature flue gas is introduced into the flue gas inlet cylinder, driving the fan-shaped plate to move toward the rotor body.

[0010] Optionally, the extrusion section includes: A heat-receiving tube is suspended inside the flue gas inlet cylinder and is used to absorb heat from the flue gas. A heat pipe, the first end of which is fixedly connected to the heat-receiving pipe; An expansion cylinder is provided with a mounting groove on the shell corresponding to the position of the sector plate. The expansion cylinder is embedded in the mounting groove and is connected to the second end of the heat-conducting pipe. An extrusion column, the first end of which is fixedly connected to the side of the expansion cylinder facing the sector plate, and the second end of which is used to abut against the sector plate.

[0011] Optionally, a cover plate is also included, which is disposed over the opening of the mounting groove and located on the side of the expansion cylinder away from the extrusion column, and the cover plate is connected to the housing.

[0012] Optionally, the interior of the heating pipe, the heat-conducting pipe, and the expansion cylinder is filled with heat-conducting oil.

[0013] Optionally, an insulation layer is provided on the outer wall of the heat pipe.

[0014] Beneficial effects The rotary air preheater provided in the embodiments of the present invention has a double-layer sealing structure formed by installing a sealing part on the rotor body and the sealing part contacting the fan-shaped plate when the rotor rotates and passes through the fan-shaped plate. This prevents flue gas and air from flowing between the flue gas zone and the air zone through the gap, thereby effectively reducing the radial air leakage rate. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a structural diagram of the rotor body of the present invention; Figure 3 This is a cross-sectional view of the rotor body of the present invention; Figure 4 This is a structural diagram showing the connection between the partition plate and the sealing part of the present invention; Figure 5 This is an enlarged structural view of the sealing part of the present invention; Figure 6 This is a structural diagram of the sealing part of the present invention; Figure 7 This is a first-view structural diagram of the extrusion section of the present invention; Figure 8 This is a second-view structural diagram of the extrusion section of the present invention.

[0016] The reference numerals in the attached figures are as follows: 1. Shell; 2. Rotor body; 21. Divider plate; 3. Sector plate; 4. Sealing part; 41. Radial sealing plate; 42. Connecting assembly; 421. Panel; 422. Transverse plate; 423. Sealing plate; 43. Sealing assembly; 431. Connecting plate; 432. Sealing sheet; 433. Support structure; 4331. Adhesive plate; 4332. Support plate; 5. Flue gas inlet cylinder; 6. Air outlet cylinder; 7. Extrusion part; 71. Heating pipe; 72. Heat conduction pipe; 73. Extrusion cylinder; 74. Extrusion column; 8. Cover plate. Detailed Implementation

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] See also Figures 1-8 As shown, according to an embodiment of this application, a rotary air preheater is provided, comprising: a housing 1, a main shaft, a rotor body 2, and a sector plate 3; the main shaft is connected to the housing 1, the rotor body 2 is rotatably mounted on the main shaft, and the sector plate 3 is symmetrically arranged inside the housing 1 and located in the gap between the housing 1 and the rotor body 2; wherein, the rotor body 2 includes a plurality of partition plates 21, and a sealing part 4 is provided on the partition plate 21; when the rotor body 2 rotates with the main shaft inside the housing 1 and the sealing part 4 passes through the area of ​​the sector plate 3, the sealing part 4 contacts the sector plate 3 to form a seal.

[0022] In this technical solution, the rotary air preheater provided in this application includes a shell 1, a main shaft, a rotor body 2, and sector plates 3. The shell 1 provides a closed installation and working space for the entire device, isolating it from the external environment and guiding the orderly flow of flue gas and air. The main shaft is connected to the shell 1, providing support for the rotation of the rotor body 2, ensuring that the rotor body 2 can rotate along a fixed axis during operation. The rotor body 2 is rotatably mounted on the main shaft and can rotate around the main shaft, carrying heat storage elements that circulate between the flue gas zone and the air zone within the shell 1, realizing heat transfer between high-temperature flue gas and low-temperature air. The sector plates 3 are symmetrically arranged at the hot and cold ends within the shell 1, and are located in the gap between the shell 1 and the rotor body 2, used to separate the flue gas zone and the air zone, spatially blocking direct crossflow of flue gas and air.

[0023] The rotor body 2 includes multiple partition plates 21 evenly distributed circumferentially. Adjacent partition plates 21 form independent fan-shaped compartments, which can be filled with heat storage elements such as corrugated metal plates. The partition plates 21 not only separate the compartments but also provide mounting support for the heat storage elements. When the rotor body 2 rotates within the housing 1 along with the main shaft, and the sealing part 4 passes through the area where the fan-shaped plate 3 is located, the sealing part 4 contacts the fan-shaped plate 3 to form a sealing structure, preventing flue gas and air from flowing between the flue gas and air zones through the gap, thereby effectively reducing the radial air leakage rate.

[0024] In actual operation, high-temperature flue gas enters the flue gas zone from the flue gas inlet of the shell 1. When it flows through the heat storage element of the rotor body 2, it transfers heat to the heat storage element. Then, the rotor body 2 rotates around the main shaft, carrying the heat-absorbing heat storage element into the air zone. When the low-temperature air flows through the heat storage element, it absorbs the heat stored in the heat storage element, realizing air preheating and completing one heat exchange cycle. During this process, the sealing part 4, which rotates synchronously with the partition plate 21, maintains contact and sealing with the sector plate 3. Especially when the rotary air preheater transitions from a cold state to a hot state and the rotor body 2 undergoes mushroom-shaped thermal deformation due to the hot and cold ends, the sealing part 4 can adaptively adjust its contact with the sector plate 3 according to the thermal deformation of the partition plate 21, effectively solving the radial air leakage and triangular air leakage problems commonly found in traditional rotary air preheaters.

[0025] In one feasible embodiment, the sealing portion 4 includes: Radial sealing plate 41, which is fixedly disposed on the first side of the partition plate 21, is used to contact and seal with the sector plate 3; Connecting component 42, the connecting component 42 is fixedly disposed on the second side of the partition plate 21, the second side being disposed opposite to the first side; A sealing assembly 43 is disposed on the side of the connecting assembly 42 away from the partition plate 21, and a gap is reserved between the sealing assembly 43 and the radial sealing plate 41.

[0026] In this technical solution, the sealing part 4 includes a radial sealing plate 41, a connecting assembly 42, and a sealing assembly 43. The radial sealing plate 41 is mounted on the partition plate 21 of the rotor body 2 and rotates synchronously with the partition plate 21. When it passes through the area of ​​the fan-shaped plate 3, it effectively blocks the airflow channel between the housing 1 and the rotor body 2. The connecting assembly 42 is used to fix the sealing assembly 43. It is spaced apart from the radial sealing plate 41 and rotates synchronously with the partition plate 21. When it passes through the area of ​​the fan-shaped plate 3, it can also contact the fan-shaped plate 3 to form a second sealing structure. When a small amount of airflow breaks through the first seal of the radial sealing plate 41, it will enter the gap formed by the radial sealing plate 41 and the sealing assembly 43. If flue gas passes through the radial sealing plate 41, it will enter this gap and be blocked by the sealing assembly 43, reducing the probability of flue gas leakage. When the rotor body 2 undergoes mushroom-shaped deformation due to the temperature difference from cold to hot, the radial sealing plate 41 and the sealing assembly 43 can adaptively adjust their contact state with the fan-shaped plate 3 as the compartment plate 21 deforms, always maintaining a good sealing fit, further reducing the air leakage phenomenon in the triangular leakage area, and ensuring the sealing reliability of the air preheater under operating conditions.

[0027] Understandably, the radial sealing plate 41 is made of wear-resistant and high-temperature resistant alloy material.

[0028] In one feasible embodiment, the sealing assembly 43 includes: Connecting plate 431, which is fixedly connected to connecting assembly 42; A sealing sheet 432 is disposed on the side of the connecting plate 431 facing the sector plate 3, for contacting and sealing with the sector plate 3; A support structure 433 is disposed on the connecting plate 431 and is used to support the connecting plate 431 and the sealing sheet 432.

[0029] In this technical solution, the sealing assembly 43 includes a connecting plate 431, a sealing sheet 432, and a support structure 433. The sealing sheet 432 is fixedly assembled with the connecting assembly 42 via the connecting plate 431 and rotates synchronously with the partition plate 21. When passing through the area of ​​the sector plate 3, the sealing sheet 432 contacts and engages with the sector plate 3 to form a secondary seal. The support structure 433 supports the connecting plate 431 and the sealing sheet 432 to prevent deformation due to stress from affecting the sealing effect. The sealing sheet 432 is located on the side of the connecting plate 431 facing the sector plate 3 and is made of a flexible and wear-resistant material. The top of the sealing sheet 432 is slightly higher than the top of the radial sealing plate 41. When the sealing assembly 43 passes through the area of ​​the sector plate 3, the sealing sheet 432 contacts the bottom surface of the sector plate 3 and undergoes slight elastic deformation, tightly adhering to the surface of the sector plate 3 to achieve a secondary seal. Its flexible characteristics can adapt to the slight unevenness of the surface of the sector plate 3 and the dynamic deformation of the rotor, blocking the airflow passing through the first seal.

[0030] The support structure 433 is used to support the connecting plate 431 and the sealing sheet 432. When the sealing sheet 432 contacts the sector plate 3 and is subjected to a compressive force, it will cause the connecting plate 431 to bend away from the sector plate 3. At this time, the support structure 433 can directly bear the force, preventing the connecting plate 431 and the sealing sheet 432 from being excessively deformed or broken, thus extending the service life of the connecting plate 431 and the sealing sheet 432.

[0031] In one feasible embodiment, the support structure 433 includes: A bonding plate 4331 is fixedly disposed on the side of the connecting plate 431 opposite to the connecting assembly 42; Support plate 4332, the first end of which is fixedly connected to the bonding plate 4331, and the second end of which extends toward the side away from the connecting plate 431.

[0032] In this technical solution, the support structure 433 includes a bonding plate 4331 and a support plate 4332. The bonding plate 4331 is connected to the connecting plate 431. The first end of the support plate 4332 is fixedly connected to the bonding plate 4331, and the second end extends away from the connecting plate 431. When the sealing sheet 432 comes into contact with the sector plate 3 and is compressed, causing the connecting plate 431 to bend away from the sector plate 3, the second end of the support plate 4332 can form an effective support, directly bearing the force transmitted by the connecting plate 431, preventing the connecting plate 431 from bending excessively, and preventing the connecting plate 431 from being excessively bent or broken. This avoids the sealing component 43 from failing due to structural deformation. At the same time, after the connecting plate 431 passes the sector plate 3, it can return to its initial position for subsequent sealing use.

[0033] In one feasible embodiment, the connection component 42 includes: Panel 421, which is fixedly disposed on the second side of the partition plate 21; A transverse plate 422 is disposed on the side of the insert plate 421 away from the partition plate 21 and extends in a direction away from the partition plate 21; A sealing plate 423 is disposed between the partition plate 21 and the connecting plate 431, and the bottom of the sealing plate 423 is fixed to the top of the insert plate 421 and the transverse plate 422.

[0034] In this technical solution, the connecting component 42 includes a panel 421, a transverse plate 422, and a sealing plate 423. The panel 421 is fixedly disposed on the second side of the partition plate 21 to provide support for the transverse plate 422. The transverse plate 422 is disposed on the side of the panel 421 away from the partition plate 21 and extends in a direction away from the partition plate 21. It is used to support the connecting plate 431 of the sealing component 43. The sealing plate 423 is disposed between the partition plate 21 and the connecting plate 431. Its bottom abuts against and is fixed to the top of the panel 421 and the transverse plate 422, strengthening the connection between the panel 421 and the transverse plate 422 and improving the overall stability of the connecting component 42. Through the setting of the connecting component 42, the sealing component 43 can form a secondary seal on one side of the radial sealing plate 41, forming a double seal with the radial sealing plate 41, further reducing the radial air leakage and the air leakage rate of the triangular air leakage area of ​​the air preheater.

[0035] In one feasible embodiment, it further includes a compression section 7; the housing 1 is respectively provided with a flue gas inlet cylinder 5 and an air outlet cylinder 6, the compression section 7 is disposed between the flue gas inlet cylinder 5 and the housing 1, the compression section 7 is used to deform under heat after high temperature flue gas is introduced into the flue gas inlet cylinder 5, and drive the fan-shaped plate 3 to move toward the rotor body 2.

[0036] This technical solution also includes an extrusion section 7. A flue gas inlet cylinder 5 and an air outlet cylinder 6 are fixedly mounted on the shell 1. The flue gas inlet cylinder 5 receives the high-temperature flue gas from the tail end of the boiler and guides it into the shell 1 to exchange heat with the heat storage elements of the rotor body 2. The air outlet cylinder 6 discharges the high-temperature air preheated by the heat storage elements and delivers it to the boiler furnace for combustion. The extrusion section 7 is located between the flue gas inlet cylinder 5 and the shell 1. After high-temperature flue gas is introduced into the flue gas inlet cylinder 5, the extrusion section 7 deforms due to the heat of the flue gas itself, thereby generating a driving force to push the sector plate 3 towards the rotor body 2, improving the sealing performance during use.

[0037] In one feasible embodiment, the extrusion section 7 includes: Heating tube 71 is suspended inside the flue gas inlet cylinder 5 and is used to absorb heat from the flue gas. Heat pipe 72, the first end of which is fixedly connected to the heat receiving pipe 71; An expansion cylinder 73 is provided on the housing 1 at a position corresponding to the sector plate 3. The expansion cylinder 73 is embedded in the installation groove and is connected to the second end of the heat-conducting pipe 72. The extrusion column 74 has its first end fixedly connected to the side of the expansion cylinder 73 facing the sector plate 3, and its second end is used to abut against the sector plate 3.

[0038] In this technical solution, the extrusion section 7 provided in this application includes a heating pipe 71, a heat-conducting pipe 72, an expansion cylinder 73, and an extrusion column 74. The heating pipe 71 is suspended inside the flue gas inlet cylinder 5, made of high-temperature resistant metal tubing, and configured with an S-shaped or spiral structure to maximize the contact area with the high-temperature flue gas, ensuring rapid and efficient absorption of flue gas heat. The suspended heating pipe 71 avoids direct contact with the inner wall of the flue gas inlet cylinder 5, reducing heat loss due to conduction to the cylinder wall, while ensuring smooth flow of flue gas across the surface of the heating pipe 71, thus improving heat collection efficiency. When high-temperature flue gas is introduced from the flue gas inlet cylinder 5, the heating pipe 71 comes into full contact with the flue gas and quickly absorbs the sensible heat in the flue gas. The first end of the heat-conducting pipe 72 is connected to the heating pipe 71 and internally connected, and the second end extends to the mounting groove of the shell 1 and is connected to the expansion cylinder 73. It is made of high-temperature resistant alloy pipe with excellent thermal conductivity, and the outer wall is also wrapped with a heat insulation layer to reduce heat loss during the transfer process. The heat-conducting pipe 72 is used to transfer the heat absorbed by the heating pipe 71 to the expansion cylinder 73, realizing the heat transfer from the flue gas inlet cylinder 5 to the expansion cylinder 73 in the mounting groove of the shell 1. The expansion cylinder 73 is embedded in the mounting groove opened on the shell 1 corresponding to the position of the fan-shaped plate 3, and is connected to the second end of the heat-conducting pipe 72. It is made of high-temperature resistant metal material with a stable coefficient of thermal expansion, and is filled with heat-conducting oil as a heat transfer and expansion medium. After the expansion cylinder 73 is installed in the mounting groove, the shell 1 can limit it from the top of the expansion cylinder 73. This ensures that the deformation direction is axially oriented towards the sector plate 3; the first end of the extrusion column 74 is fixedly connected to the side of the expansion cylinder 73 facing the sector plate 3, and the second end is used to abut against the sector plate 3. When the expansion cylinder 73 is heated and expands and deforms, it will drive the extrusion column 74 to move closer to the sector plate 3. After its second end abuts against the sector plate 3, it will transmit the thrust to the sector plate 3, thereby extruding the driving sector plate 3 so that the sector plate 3 is offset towards the rotor body 2, making the sealing between the sector plate 3 and the radial sealing plate 41 and the sealing part 4 stronger and reducing the air leakage rate.

[0039] In one feasible embodiment, a cover plate 8 is also included, which is disposed over the opening of the mounting groove and located on the side of the expansion cylinder 73 away from the extrusion column 74, and the cover plate 8 is connected to the housing 1.

[0040] This technical solution also includes a cover plate 8, which is adapted to protect and limit the installation of the expansion cylinder 73 in the extrusion section 7. The cover plate 8 is placed over the opening of the mounting groove on the housing 1 and is located on the side of the expansion cylinder 73 away from the extrusion column 74. It is fixedly connected to the housing 1 by bolts or welding, forming a closed protection and limiting effect on the mounting groove and the internal expansion cylinder 73. The cover plate 8 can axially limit the expansion cylinder 73 and constrain the deformation direction of the expansion cylinder 73. Since the cover plate 8 is fixed to the opening of the mounting groove, when the expansion cylinder 73 is heated and expands, the end away from the extrusion column 74 is blocked by the cover plate 8 and cannot deform in that direction. This ensures that the expansion force of the expansion cylinder 73 is completely converted into a driving force to push the extrusion column 74 in the direction towards the rotor body 2, thereby driving the sector plate 3 to be extruded.

[0041] In one feasible embodiment, the interiors of the heated pipe 71, the heat-conducting pipe 72, and the expansion cylinder 73 are filled with heat-conducting oil.

[0042] In this technical solution, the heating pipe 71, the heat-conducting pipe 72, and the expansion cylinder 73 are connected. The heat-conducting oil filled inside can flow and transfer heat within the closed cavity formed by the three. When high-temperature flue gas enters the flue gas inlet cylinder 5, the heating pipe 71 absorbs the heat of the flue gas and first transfers it to the heat-conducting oil inside. After the heat-conducting oil is heated, it quickly transfers the heat along the heat-conducting pipe 72 to the interior of the expansion cylinder 73 by means of thermal convection. When the heat is transferred to the heat-conducting oil in the expansion cylinder 73, the expansion cylinder 73 will expand due to the heat, generating an outward expansion force. Since the expansion cylinder 73 is embedded in the mounting groove and one end is limited by the cover plate 8, the expansion force generated by the expansion cylinder 73 will act on the end facing the extrusion column 74, causing the extrusion column 74 to drive the sector plate 3 to press against the rotor body 2, so that the sector plate 3 can fit more tightly with the radial sealing plate 41 and the sealing assembly 43, further improving the sealing performance.

[0043] In one feasible embodiment, an insulation layer is provided on the outer wall of the heat pipe 72.

[0044] In this technical solution, by providing an insulation layer on the outer wall of the heat pipe 72, the heat pipe 72 can be effectively insulated, thereby improving its heat conduction efficiency. The insulation layer can be an insulation felt.

[0045] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A rotary air preheater, characterized in that, include: The device comprises a housing (1), a main shaft, a rotor body (2), and a sector plate (3); the main shaft is connected to the housing (1), the rotor body (2) is rotatably mounted on the main shaft, and the sector plate (3) is symmetrically arranged inside the housing (1) and located in the gap between the housing (1) and the rotor body (2); wherein, the rotor body (2) includes a plurality of partition plates (21), and the partition plates (21) are provided with sealing parts (4); when the rotor body (2) rotates with the main shaft inside the housing (1) and the sealing parts (4) pass through the area of ​​the sector plate (3), the sealing parts (4) contact the sector plate (3) to form a seal.

2. The rotary air preheater according to claim 1, characterized in that, The sealing part (4) includes: Radial sealing plate (41), the radial sealing plate (41) is fixedly disposed on the first side of the compartment plate (21) for contact and sealing with the sector plate (3); A connecting component (42) is fixedly disposed on the second side of the partition plate (21), the second side being disposed opposite to the first side; A sealing assembly (43) is disposed on the side of the connecting assembly (42) away from the compartment plate (21), and a gap is reserved between the sealing assembly (43) and the radial sealing plate (41).

3. The rotary air preheater according to claim 2, characterized in that, The sealing assembly (43) includes: A connecting plate (431) is fixedly connected to the connecting assembly (42); A sealing sheet (432) is disposed on the side of the connecting plate (431) facing the sector plate (3) for contacting and sealing with the sector plate (3); A support structure (433) is disposed on the connecting plate (431) for supporting the connecting plate (431) and the sealing sheet (432).

4. The rotary air preheater according to claim 3, characterized in that, The support structure (433) includes: A bonding plate (4331) is fixedly disposed on the side of the connecting plate (431) opposite to the connecting assembly (42); A support plate (4332) is provided, the first end of which is fixedly connected to the bonding plate (4331), and the second end of which extends toward the side away from the connecting plate (431).

5. The rotary air preheater according to claim 2, characterized in that, The connection component (42) includes: A panel (421) is fixedly disposed on the second side of the partition plate (21); A transverse plate (422) is disposed on the side of the insert (421) away from the partition plate (21) and extends in a direction away from the partition plate (21); A sealing plate (423) is disposed between the partition plate (21) and the connecting plate (431), and the bottom of the sealing plate (423) is fixed to the top of the insert plate (421) and the transverse plate (422).

6. The rotary air preheater according to claim 1, characterized in that, It also includes a compression section (7); the housing (1) is respectively provided with a flue gas inlet cylinder (5) and an air outlet cylinder (6), the compression section (7) is disposed between the flue gas inlet cylinder (5) and the housing (1), the compression section (7) is used to deform under heat after high temperature flue gas is introduced into the flue gas inlet cylinder (5), and drive the fan-shaped plate (3) to move toward the rotor body (2).

7. The rotary air preheater according to claim 6, characterized in that, The extrusion section (7) includes: Heating tube (71), which is suspended inside the flue gas inlet cylinder (5) to absorb heat from the flue gas; A heat pipe (72), the first end of which is fixedly connected to the heat-receiving pipe (71); An expansion cylinder (73) is provided on the shell (1) at a position corresponding to the fan-shaped plate (3). The expansion cylinder (73) is embedded in the mounting groove and is connected to the second end of the heat-conducting pipe (72). The extrusion column (74) has its first end fixedly connected to the side of the expansion cylinder (73) facing the sector plate (3), and its second end is used to abut against the sector plate (3).

8. The rotary air preheater according to claim 7, characterized in that, It also includes a cover plate (8), which covers the opening of the mounting groove and is located on the side of the expansion cylinder (73) away from the extrusion column (74), and the cover plate (8) is connected to the housing (1).

9. The rotary air preheater according to claim 8, characterized in that, The interiors of the heat-receiving pipe (71), the heat-conducting pipe (72), and the expansion cylinder (73) are filled with heat-conducting oil.

10. The rotary air preheater according to claim 9, characterized in that, An insulation layer is provided on the outer wall of the heat pipe (72).

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