Installation frame of air preheater and installation method of air preheater

Abstract

This disclosure relates to an air preheater mounting frame and an air preheater installation method. The mounting frame is used to support the air preheater and the ash hopper along the Z-direction. The mounting frame includes two side plates and two end plates. The two side plates are arranged opposite to each other and spaced apart along the Y-direction, and the two end plates are arranged opposite to each other and spaced apart along the X-direction, forming an airflow channel connecting the air preheater and the ash hopper. The airflow channel has a rectangular cross-section along the Z-direction. The mounting frame also includes a support plate disposed on the side of the side plate closest to the ash hopper along the Z-direction. The support plate protrudes from the side plate along the Y-direction, wherein the Z, Y, and X directions are perpendicular to each other. This design ensures normal flue gas flow during unit operation and prevents deformation of the mounting frame and air preheater. It solves the problems of load-bearing capacity of the air preheater, slippage during installation, and support stability without increasing flue gas resistance.

Description

Technical Field

[0001] This disclosure relates to air preheaters, and more specifically, to an air preheater mounting frame and an air preheater mounting method. Background Technology

[0002] An air preheater is a device that preheats the air entering the boiler to a certain temperature, thereby improving the boiler's heat exchange performance and reducing energy consumption.

[0003] In related technologies, air preheaters need to be installed on a mounting frame via a connecting structure. The long-term operation of air preheaters means that both the connecting components and the air preheater itself require maintenance and replacement. Due to the complexity of the existing air preheater's connecting structure, the installation and disassembly process is quite cumbersome. Furthermore, the limited hoisting space for air preheaters increases the difficulty of moving them, and there is even a risk of mounting frame deformation during the movement of the air preheater, which can affect the normal use of the air preheater. Summary of the Invention

[0004] The first objective of this disclosure is to provide an air preheater mounting frame that at least partially solves the technical problems existing in the related art.

[0005] A second object of this disclosure is to provide a method for installing an air preheater on an ash hopper using a mounting frame provided in this disclosure.

[0006] To achieve the above objectives, this disclosure provides an installation frame for an air preheater, which is used to support the air preheater and the ash hopper along the Z-direction. The installation frame includes two side plates and two end plates. The two side plates are arranged opposite to each other and spaced apart along the Y-direction, and the two end plates are arranged opposite to each other and spaced apart along the X-direction, forming an airflow channel with the two side plates for connecting the air preheater and the ash hopper. The airflow channel has a rectangular cross-section along the Z-direction. The installation frame also includes a support plate disposed in the Z-direction on the side of the side plate closest to the ash hopper. The support plate protrudes from the side plate along the Y-direction, wherein the Z-direction, the Y-direction, and the X-direction are perpendicular to each other.

[0007] Optionally, the Z direction is the height direction of the side plate and the end plate, the Y direction is the thickness direction of the side plate, and the X direction is the thickness direction of the end plate and the length direction of the side plate.

[0008] Optionally, the mounting frame further includes multiple support rods, which are spaced apart along the X direction and abut against the two side plates along the Y direction.

[0009] Optionally, the mounting frame further includes two sealing plates; in the X direction, the two sealing plates are positioned opposite each other and spaced apart between the two end plates, and protrude from the two side plates in the Y direction; in the Z direction, the two sealing plates protrude from the side plates toward the direction of the ash hopper.

[0010] Optionally, the two side plates are provided with support ribs on the side opposite to each other along the Y direction for supporting the bottom of the air preheater along the Z direction.

[0011] Optionally, multiple support ribs are spaced apart on the side plate along the X direction.

[0012] Optionally, the mounting frame further includes a lifting lug for engaging with a moving device that moves the mounting frame.

[0013] Optionally, the mounting frame further includes a sliding plate, the sliding plate comprising:

[0014] A vertical segment, the length of which extends along the Y direction, and the vertical segment is installed on the X-direction edge of the two side plates and protrudes from the two side plates in the Y direction;

[0015] The horizontal segment extends along the Y direction in its length direction and along the X direction in its width direction; one side of the horizontal segment in its width direction is perpendicularly connected to the vertical segment and is supported on the side edge of the two side plates near the ash hopper.

[0016] Optionally, the horizontal section is provided with a sliding plate on the side of the ash hopper in the Z direction, and the sliding plate is coated with a lubricating layer.

[0017] A second aspect of this disclosure also provides a method for installing an air preheater, the method comprising installing the air preheater onto an ash hopper using the mounting frame described above, the method comprising:

[0018] Multiple mounting frames are arranged along the Y direction.

[0019] The above technical solution allows the air preheater to be installed on the ash hopper using the mounting frame provided in this disclosure, integrating the mounting frame and the air preheater into a single unit, thus reducing the difficulty of moving and installing the air preheater. The airflow channel formed within the mounting frame ensures normal flue gas flow during air preheater operation without increasing resistance. Furthermore, configuring the airflow channel as a structure formed by the mounting frame itself and providing support plates ensures sufficient reliability of the mounting frame, preventing twisting and deformation, and effectively guaranteeing the support strength for the air preheater.

[0020] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a partial structural schematic diagram of the mounting frame for installing an air preheater provided in an exemplary embodiment of this disclosure;

[0023] Figure 2 This is a front view of the mounting frame for mounting an air preheater provided in an exemplary embodiment of this disclosure;

[0024] Figure 3 This is a top view of the mounting frame for mounting an air preheater provided in an exemplary embodiment of this disclosure;

[0025] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0026] Figure 5 This is a side view of the mounting frame for mounting an air preheater provided in an exemplary embodiment of this disclosure;

[0027] Figure 6 This is a flowchart of a method for installing an air preheater provided by an exemplary embodiment of this disclosure.

[0028] Explanation of reference numerals in the attached figures

[0029] 10-Side plate; 20-End plate; 30-Airflow channel; 40-Support plate; 50-Support rod; 60-Sealing plate; 70-Skateboard; 71-Vertical section; 72-Horizontal section; 80-Hanging lug; 90-Support plate rib; 100-Assisted skateboard. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the outline of the corresponding component itself; directional terms such as "upper," "lower," "top," "bottom," "horizontal," and "vertical" are defined based on the usage habits of the mounting frame provided in this disclosure, and can be found in the following references. Figure 1 The orientation of the diagram shown is as follows: Figure 1In the diagram, the side pointed to by the Z-arrow is the top and apex, and the opposite side is the bottom and apex. Furthermore, the Z-direction indicates the height of the side plate, the X-direction indicates the length of the side plate, and the Y-direction indicates the width of the side plate; the X and Y directions indicate the horizontal direction, and the Z-direction indicates the vertical direction. Terms such as "first" and "second" used in this disclosure are for distinguishing one element from another and do not indicate sequence or importance. Additionally, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements.

[0032] Reference Figures 1-5 This disclosure provides an installation frame for an air preheater, which can be used to support the air preheater and the ash hopper along the Z-direction (vertical direction). The installation frame may include two side plates 10 and two end plates 20. The two side plates 10 can be arranged opposite each other and spaced apart along the Y-direction, and the two end plates 20 can be arranged opposite each other and spaced apart along the X-direction (perpendicular to the Y-direction). The two end plates 20 and the two side plates 10 can form an airflow channel 30 connecting the air preheater and the ash hopper. Therefore, after the air preheater is installed by the installation frame, the installation frame will not increase the resistance of the flue gas, ensuring the normal flow of the flue gas. In this disclosure, the two side plates 10 and the two end plates 20 can be constructed as rectangular plate structures, so that the cross-section of the airflow channel 30 along the Z-direction can be constructed as a rectangle. The inner contour area of ​​the airflow channel 30 can match the inner contour area of ​​the air preheater, thereby ensuring the stability of the air preheater support without occupying too much space, making the overall structure of the device stronger. The mounting frame may also include a support plate 40, which can be positioned in the Z direction on the side of the side plate 10 near the ash hopper. This effectively prevents the bottom of the side plate 10 from directly contacting the contact surface where the mounting frame is placed, thus avoiding wear on the side plate 10 and extending its service life. The support plate 40 may protrude from the side plate 10 in the Y direction, such as... Figure 5 As shown, the cross-section of the support plate 40 and side plate 10 after installation can be constructed into a "T" shape, thereby increasing the contact area between the support plate 40 and the ash hopper, improving the stability of the installation frame, and also shielding the edges of the side plate 10, effectively reducing the risk of deformation of the support plate 40 and side plate 10 during movement. In this disclosure, the installation frame can move along the Y direction. The Z, Y, and X directions are perpendicular to each other.

[0033] The above technical solution allows the air preheater to be installed on the ash hopper using the mounting frame provided in this disclosure, integrating the mounting frame and the air preheater into a single unit, thus reducing the difficulty of moving and installing the air preheater. The airflow channel 30 formed within the mounting frame ensures normal flue gas flow during air preheater operation without increasing resistance. Furthermore, configuring the airflow channel as a structure formed by the mounting frame itself and providing a support plate 40 ensures sufficient reliability of the mounting frame, preventing twisting and deformation, and effectively guaranteeing the support strength for the air preheater.

[0034] Reference Figures 1-5 The Z-direction can be the height direction of the side plate 10 and the end plate 20, the Y-direction can be the thickness direction of the side plate 10, and the X-direction can be the thickness direction of the end plate 20, and also the length direction of the side plate 10. Thus, the two side plates 10 and the two end plates 20 are spaced apart along their thickness directions. The side plates 10 and end plates 20 can be made of metal and can be fixed together by welding, improving the reliability of the connection between them, effectively increasing the strength of the mounting frame, and ensuring the stability of the mounting frame's support for the air preheater. The side plates 10 and end plates 20 support the air preheater and the ash hopper along their height direction, thereby reducing the difficulty of hoisting the air preheater and improving assembly efficiency and stability.

[0035] refer to Figures 1-3 The mounting frame may also include multiple support rods 50, which can be spaced apart along the X direction and abut against the two side plates 10 along the Y direction. This can improve the connection strength between the two side plates 10 and improve the reliability of the mounting frame, reducing the risk of deformation of the mounting frame.

[0036] Reference Figures 1-3 The mounting frame may also include two end plates 60. In the X direction, the two end plates 60 are positioned opposite each other and spaced apart between the two end plates 20, and protrude from the two side plates 10 in the Y direction. In the Z direction, the two end plates 60 protrude from the side plates 10 towards the ash hopper. The end plates 60 can be made of metal and can be welded to the side plates 10 to ensure the connection strength between the side plates 10 and the end plates 60, thus ensuring the strength and rigidity of the mounting frame. By setting the end plates 60, the support area for the air preheater is increased without increasing air resistance, thereby improving the connection strength between the mounting frame and the air preheater. The end plates 60 can be used to overlap between the two edges of the ash hopper, further improving the stability of the air preheater installation.

[0037] Reference Figure 1 and Figure 5The two side plates 10, located opposite each other along the Y direction, can be provided with support ribs 90 for supporting the bottom of the air preheater along the Z direction. The support ribs 90 can be constructed as triangular plate-like structures with dimensions gradually increasing from bottom to top. The right-angled sides of the triangular plate-like structure can be used for vertical support at the bottom of the air preheater, and the hypotenuse can be used for connection with the side plates 10, improving the stability of the connection between the mounting frame and the air preheater without occupying excessive space. In this disclosure, the support ribs 90 can be made of metal and can be welded between the air preheater and the mounting frame after the air preheater is installed, thereby effectively increasing the support area for the air preheater, increasing the connection strength between the air preheater and the mounting frame, and making the overall structure stronger.

[0038] Furthermore, multiple support ribs 90 can be spaced apart along the X direction on the side plate 10. This further increases the support area of ​​the mounting frame for the air preheater, improving the stability of the air preheater.

[0039] Reference Figure 1 and Figure 4 The mounting frame also includes lifting lugs 80, which can cooperate with a moving device for the mounting frame, making the mounting frame hoistable. This allows the hoisting direction and angle of the mounting frame to be adjusted according to different assembly requirements of the air preheater, thereby improving assembly efficiency and reducing the difficulty of moving the mounting frame. According to some embodiments provided in this disclosure, the moving device can be a hoisting device for hoisting the air preheater, thereby further improving the convenience and efficiency of moving the air preheater.

[0040] Reference Figures 1-4The mounting frame may also include a sliding plate 70. The sliding plate 70 may include a vertical section 71 and a horizontal section 72, both of which may be made of metal. The vertical section 71 extends along the Y-direction and can be mounted on the X-direction edges of the two side plates 10, meaning the side of the vertical section 71 in the width direction can connect to the side of the two side plates 10 in the thickness direction. In this disclosure, this connection can be fixed by welding, thereby improving the connection strength and overall integrity between the sliding plate 70 and the side plates 10. The vertical section 71 may protrude from the two side plates 10 in the Y-direction, providing some protection by shielding the width edges of the two side plates 10 and reducing the risk of deformation during movement. The horizontal section 72 extends along the Y-direction in the length direction and extends along the X-direction in the width direction; one side of the horizontal section 72 in the width direction is perpendicularly connected to the vertical section 71, for example, by welding, thereby improving the overall strength and rigidity of the sliding plate 70. The top surface of the horizontal section 72 can rest on the edge of the two side plates 10 near the ash hopper, thus providing some protection to the bottom edge of the side plates 10, greatly reducing wear on the side plates 10 during movement and improving their service life. The top surface of the horizontal section 72 can also extend to the bottom of the end plate 20, thereby reducing wear on the end plate 20 and improving its service life. In this disclosure, the mounting frame and air preheater can move along the Y direction, and the bottom surface of the horizontal section 72 can be used to contact the sliding surface. The sliding surface can be located near the ash hopper to guide the sliding of the mounting frame. The horizontal section 72 can protrude from the side plate along the X direction, thereby increasing the contact area between the horizontal section 72 and the sliding surface, and thus improving the stability of the mounting frame during sliding.

[0041] Reference Figure 2 A sliding plate 100 may be provided on the side of the horizontal section 72 near the ash hopper in the Z direction. The sliding plate 100 may be coated with a lubricating layer. According to some embodiments provided in this disclosure, the sliding plate 100 can be used to contact the aforementioned sliding surface, and the sliding plate 100 can be made of PTFE, giving it strong corrosion resistance and high lubricity and non-stick properties, reducing resistance during the movement of the mounting frame, and extending the service life of the sliding plate 100. The lubricating layer can be grease coated on the sliding plate 100, further reducing resistance during the movement of the mounting frame, improving the efficiency of the moving assembly of the mounting frame and the air preheater, and allowing adjustment of the amount of grease applied according to movement requirements.

[0042] Reference Figures 1-6A second aspect of this disclosure also provides a method for installing an air preheater. This method uses the aforementioned mounting frame to install the air preheater onto an ash hopper. The installation method includes arranging multiple mounting frames along the Y direction. Specifically, the method includes step S101, setting a sliding plate 70 on the side plate 10, on which a lifting lug 80 and an auxiliary sliding plate 100 are mounted; step S102, lifting a first air preheater to a preset height, and then moving the mounting frame below the first air preheater using a moving device; step S103, welding the mounting frame to the first air preheater, i.e., welding the first air preheater to the side plate 10 and the end plate 20; step S104, lifting a second air preheater to a preset height, and then moving the mounting frame below the first air preheater using a moving device. Step S105: Move the mounting frame of the preheater to below the second air preheater; Step S106: Weld the second air preheater above the first air preheater; Step S107: Lift the third air preheater to a preset height, and then move the mounting frame with the first and second air preheaters welded on it to below the third air preheater using a moving device; Step S108: Weld the third air preheater above the second air preheater; Step S109: Weld support ribs between the first air preheater and the mounting frame. It should be noted that steps S101 to S108 above are for installing one set of air preheater modules. When there are multiple sets of air preheater modules, multiple mounting frames can be arranged along the Y direction, and steps S101 to S108 can be repeated.

[0043] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0045] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An installation frame of an air preheater for supporting in a Z direction between the air preheater and a hopper, characterized by, The mounting frame includes two side plates and two end plates. The two side plates are positioned opposite each other and spaced apart along the Y direction, and the two end plates are positioned opposite each other and spaced apart along a direction perpendicular to the X direction. Together with the two side plates, they form an airflow channel connecting the air preheater and the ash hopper. The airflow channel has a rectangular cross-section along the Z direction. The mounting frame also includes a support plate positioned along the Z direction on the side of the side plate closest to the ash hopper. The support plate protrudes from the side plate along the Y direction, wherein the Z direction, the Y direction, and the X direction are mutually perpendicular. The Z direction is the height direction of the side plate and the end plate, the Y direction is the thickness direction of the side plate, and the X direction is the thickness direction of the end plate and the length direction of the side plate.

2. The mounting frame of claim 1, wherein, The mounting frame also includes multiple support rods, which are spaced apart along the X direction and abut against the two side plates along the Y direction.

3. The mounting frame of claim 1, wherein, The mounting frame also includes two sealing plates; in the X direction, the two sealing plates are positioned opposite each other and spaced apart between the two end plates, and protrude from the two side plates in the Y direction; in the Z direction, the two sealing plates protrude from the side plates toward the direction of the ash hopper.

4. The mounting frame of claim 1, wherein, The two side plates are provided with support ribs on the side facing away from each other along the Y direction for supporting the bottom of the air preheater along the Z direction.

5. The mounting frame of claim 4, wherein, The support plate ribs are arranged at intervals along the X direction on the side plate.

6. The mounting frame of claim 1, wherein, The mounting frame also includes lifting lugs for cooperating with a moving device that moves the mounting frame.

7. The mounting frame of claim 6, wherein, The mounting frame also includes a sliding plate, the sliding plate comprising: A vertical segment, the length of which extends along the Y direction, and the vertical segment is installed on the X-direction edge of the two side plates and protrudes from the two side plates in the Y direction; The horizontal segment extends along the Y direction in its length direction and along the X direction in its width direction; one side of the horizontal segment in its width direction is perpendicularly connected to the vertical segment and is supported on the side edge of the two side plates near the ash hopper.

8. The mounting frame of claim 7, wherein, The horizontal section has an auxiliary sliding plate on its side in the Z direction near the ash hopper, and the auxiliary sliding plate is coated with a lubricating layer.

9. A method of installing an air preheater, characterized by, The installation method uses the mounting frame according to any one of claims 1-8 to install the air preheater on the ash hopper, the installation method comprising: Multiple mounting frames are arranged along the Y direction.

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