Hot air waste heat recovery device

Abstract

The utility model provides a hot air waste heat recovery device, and relates to the technical field of waste heat recovery, the hot air waste heat recovery device comprises a filter box, a partition plate is arranged in the filter box, the partition plate divides the interior of the filter box into an air guide chamber and a filter chamber from left to right, one side of the filter box is provided with a hot air input pipe communicating with the air guide chamber, and the other side of the filter box is provided with a heat exchanger body; a hot air inlet of the heat exchanger body is communicated with the filter chamber, a through hole communicated with the air guide chamber and the filter chamber is formed in the lower portion of the partition plate, a filter screen is arranged at the position of the through hole, a filter assembly is detachably arranged in the filter chamber, a drain pipe communicated with the air guide chamber is arranged at the bottom of the filter box, and a drain valve is arranged on the drain pipe. The filter box is divided into the air guide chamber and the filter chamber through the partition plate, particle impurities in hot air are preliminarily filtered through the filter screen of the through hole in the lower portion of the partition plate, the filter assembly is detachably arranged in the filter chamber to further filter the hot air, the cleanliness of the hot air is improved, and particles are prevented from entering the heat exchanger body to accumulate and reduce the heat conduction performance; the heat exchange efficiency is ensured.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, and more specifically, to a hot air waste heat recovery device. Background Technology

[0002] In the silica production process, hot air is generated during the spray drying stage. In this stage, hot air enters from the bottom of the equipment, comes into full contact with the sprayed particles, and exchanges heat, causing the moisture in the particles to evaporate rapidly, achieving the drying purpose. In some large-scale silica production enterprises, heat exchangers are often installed to recover the waste heat from the hot air generated in this stage; shell-and-tube heat exchangers are commonly used.

[0003] However, during the heat exchange process, there are fine particles in the hot air. Over time, these particles accumulate on the inner wall of the tubes of the shell-and-tube heat exchanger, forming fouling. This not only reduces the thermal conductivity of the heat exchanger but also reduces the cross-sectional area of ​​the fluid channel, increases the fluid resistance, and thus affects the heat exchange efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a hot air waste heat recovery device, which can solve the technical problem in the prior art that when hot air waste heat is recovered by heat exchangers in the spray drying process of silica, fine particles in the hot air will accumulate on the inner wall of the heat exchanger pipes and heat exchange plates during the heat exchange process, forming dirt, which will reduce the thermal conductivity of the heat exchanger, reduce the cross-sectional area of ​​the fluid channel, increase the fluid resistance, and thus affect the heat exchange efficiency.

[0005] This application provides a hot air waste heat recovery device, including a filter box. A partition divides the interior of the filter box from left to right into an air guide chamber and a filter chamber. A hot air inlet pipe communicating with the air guide chamber is located on one side of the filter box, and a heat exchanger body is located on the other side of the filter box. The hot air inlet of the heat exchanger body communicates with the filter chamber. A through hole communicating with the air guide chamber and the filter chamber is located at the lower part of the partition, and a filter screen is located at the through hole. A filter assembly is detachably installed inside the filter chamber. A drain pipe communicating with the air guide chamber is located at the bottom of the filter box, and a drain valve is installed on the drain pipe.

[0006] Furthermore, the filter assembly includes a cover plate, a first connecting plate, a filter cage, a second connecting plate, and a dust collection tray. The bottom of the cover plate is connected to the top of the filter cage through the first connecting plate, and the bottom of the filter cage is connected to the dust collection tray through the second connecting plate. The first connecting plate and the second connecting plate are arranged opposite to each other. The top of the filter box is provided with an opening communicating with the filter chamber. The cover plate is adapted to the opening, and the filter assembly is removably installed in the filter chamber through the opening.

[0007] Furthermore, the filter cage is equipped with filter packing material.

[0008] Furthermore, the filter media is activated carbon.

[0009] Furthermore, a first sealing ring is provided at the connection between the cover plate and the filter box, and a locking assembly for locking the cover plate to the opening is provided on the top of the filter box.

[0010] Furthermore, the locking assembly includes a threaded post, a clamping block, and a locking nut. One end of the threaded post is fixed to the top of the filter box. The clamping block has a through hole that matches the threaded post. The clamping block is movably fitted onto the threaded post through the through hole. The locking nut is threadedly connected to the threaded post and is located above the clamping block. By tightening the locking nut, the clamping block can be pressed against the top of the cover plate.

[0011] Furthermore, there are two locking components, which are symmetrically arranged.

[0012] Furthermore, it also includes a cleaning assembly, which includes a cleaning block and a cleaning cylinder. The size of the cleaning block is adapted to the air guide chamber. The cleaning block is movably disposed in the air guide chamber. The cleaning cylinder is fixed to the top of the filter box. The telescopic rod of the cleaning cylinder extends into the air guide chamber and connects with the cleaning block.

[0013] Furthermore, a second sealing ring is provided at the connection between the extension rod of the cleaning cylinder and the filter box.

[0014] Furthermore, the bottom of the cleaning block is inclined, and the inclined surface of the cleaning block is opposite to the air outlet of the hot air input pipe.

[0015] The beneficial effects of this utility model are:

[0016] This invention divides the filter box into an air guide chamber and a filter chamber using a partition. A through hole connecting the air guide chamber and the filter chamber is provided at the bottom of the partition, and a filter screen is installed there. This can initially filter particulate impurities in the hot air. A filter assembly is detachably installed in the filter chamber, which can further filter the hot air, improve the cleanliness of the hot air entering the heat exchanger body, prevent particles in the hot air from accumulating in the heat exchanger body and reducing thermal conductivity, and ensure heat exchange efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0019] Figure 2 This is a cross-sectional view of a filter box in some embodiments of this application;

[0020] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle;

[0021] The reference numerals in the attached figures are as follows:

[0022] 1. Filter box; 2. Partition plate; 3. Air guide chamber; 4. Filter chamber; 5. Hot air inlet pipe; 6. Heat exchanger body; 7. Filter screen; 8. Filter assembly; 81. Cover plate; 82. First connecting plate; 83. Filter cage; 84. Second connecting plate; 85. Ash receiving tray; 9. Drain pipe; 10. Drain valve; 11. Filter packing; 12. First sealing ring; 13. Locking assembly; 131. Threaded post; 132. Anchor block; 133. Locking nut; 14. Cleaning assembly; 141. Cleaning block; 142. Cleaning cylinder; 15. Second sealing ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances. Specific implementation examples:

[0030] like Figure 1 and Figure 2As shown, this application provides a hot air waste heat recovery device, including a filter box 1. A partition 2 is provided inside the filter box 1, dividing the interior of the filter box 1 from left to right into an air guide chamber 3 and a filter chamber 4. A hot air inlet pipe 5 communicating with the air guide chamber 3 is provided on one side of the filter box 1, and a heat exchanger body 6 is provided on the other side of the filter box 1. In this embodiment, the heat exchanger body 6 is a shell-and-tube heat exchanger, which is prior art and will not be described in detail here. The hot air inlet of the heat exchanger body 6 communicates with the filter chamber 4. A through hole communicating with the air guide chamber 3 and the filter chamber 4 is provided at the lower part of the partition 2, and a filter screen 7 is provided at the through hole. A filter assembly 8 is detachably provided inside the filter chamber 4. The bottom of the filter box 1 is provided with a connection to the air guide chamber 3. The chamber 3 is connected to the drain pipe 9, which is equipped with a drain valve 10. In use, hot air enters the air guide chamber 3 through the hot air inlet pipe 5. After being initially filtered by the filter screen 7 at the lower through hole of the partition 2, it enters the filter chamber 4. The detachable filter assembly 8 in the filter chamber 4 further filters the hot air, improving the cleanliness of the hot air entering the heat exchanger body and preventing particles in the hot air from accumulating in the heat exchanger body 6 and reducing the thermal conductivity, thus ensuring the heat exchange efficiency. The filtered hot air enters the heat exchanger body 6 (the heat exchanger body 6 needs to be supplied with a heat exchange medium, such as cooling water) for heat exchange to achieve waste heat recovery. The particulate impurities filtered by the filter screen 7 are discharged through the drain pipe 9, and the drain valve 10 controls the discharge process.

[0031] like Figure 2 As shown, the filter assembly 8 includes a cover plate 81, a first connecting plate 82, a filter cage 83, a second connecting plate 84, and a dust collection tray 85. The bottom of the cover plate 81 is connected to the top of the filter cage 83 through the first connecting plate 82, and the bottom of the filter cage 83 is connected to the dust collection tray 85 through the second connecting plate 84. The first connecting plate 82 and the second connecting plate 84 are arranged opposite to each other. The top of the filter box 1 has an opening communicating with the filter chamber 4. The cover plate 81 is adapted to the opening. The filter assembly 8 is installed in the filter chamber 4 in a removable manner through the opening. The filter assembly 8 is installed in the filter chamber 4 in a removable manner through the opening at the top of the filter box 1. It is convenient to operate and facilitates quick installation and disassembly. When cleaning or replacing the filter assembly 8, the entire assembly can be taken out simply by pulling out the cover plate 81. No complicated tools or operations are required. The filter cage 83 can effectively filter particulate impurities in hot air, and the dust collection tray 85 can receive the filtered particles to prevent particles from accumulating in the filter chamber 4 and ensure the filtration effect.

[0032] like Figure 2 As shown, the filter cage 83 is equipped with filter packing 11, which can adsorb and trap fine particles and impurities in the hot air, further improving the filtration accuracy. The presence of filter packing 11 increases the filtration area of ​​the filter cage 83, making the filtration process more efficient.

[0033] like Figure 2As shown, the filter media 11 is activated carbon. Activated carbon has a rich pore structure and a huge specific surface area, and has a strong adsorption capacity for various impurities, odors, and harmful gases in hot air. In the process of silicon dioxide production, activated carbon can adsorb organic volatiles, fine dust, etc. that may exist in the hot air, thereby purifying the hot air.

[0034] like Figure 2 As shown, a first sealing ring 12 is provided at the connection between the cover plate 81 and the filter box 1, and a locking assembly 13 is provided on the top of the filter box 1 to lock the cover plate 81 at the opening. The sealing and stability of the connection between the filter box 1 and the cover plate 81 are enhanced by the first sealing ring 12 and the locking assembly 13, so as to ensure the filtration effect and the reliability of the system operation.

[0035] like Figure 1-3 As shown, the locking assembly 13 includes a threaded post 131, a retaining block 132, and a locking nut 133. One end of the threaded post 131 is fixed to the top of the filter box 1. The retaining block 132 has a through hole that matches the threaded post 131. The retaining block 132 is movably fitted onto the threaded post 131 through the through hole. The locking nut 133 is threadedly connected to the threaded post 131 and is located above the retaining block 132. By tightening the locking nut 133, the retaining block 132 can press against the top of the cover plate 81. The retaining block 132 can move on the threaded post 131. By adjusting the position of the retaining block 132, it can adapt to cover plates 81 of different thicknesses. At the same time, the tightening degree of the locking nut 133 can be adjusted according to actual needs to achieve the best fastening effect. It is easy to operate, has strong stability, is flexible in adjustment, and is safe and reliable.

[0036] like Figure 1 As shown, there are two locking components 13, which are symmetrically arranged. The two symmetrically arranged locking components 13 can apply pressure to the cover plate 81 evenly, ensuring that the connection between the cover plate 81 and the filter box 1 is evenly stressed, and effectively preventing hot air leakage.

[0037] like Figure 2 As shown, the hot air waste heat recovery device of this application also includes a cleaning component 14, which includes a cleaning block 141 and a cleaning cylinder 142. The size of the cleaning block 141 is adapted to the air guide chamber 3. The cleaning block 141 is movably disposed in the air guide chamber 3. The cleaning cylinder 142 is fixed to the top of the filter box 1. The telescopic rod of the cleaning cylinder 142 extends into the air guide chamber 3 and connects with the cleaning block 141. The telescopic rod of the cleaning cylinder 142 pushes the cleaning block 141 to move in the air guide chamber 3. Through the contact between the cleaning block 141 and the inner wall of the air guide chamber 3, dust, particles and other impurities are pushed down from the inner wall of the air guide chamber 3, thereby cleaning the air guide chamber 3 and preventing dust, particles and other impurities from adhering to the inner wall of the air guide chamber 3 and affecting the cross-sectional area of ​​the fluid channel, thus improving the hot air circulation efficiency.

[0038] like Figure 2 As shown, a second sealing ring 15 is provided at the connection between the extension rod of the cleaning cylinder 142 and the filter box 1 to prevent hot air from leaking from the connection between the extension rod of the cleaning cylinder 142 and the filter box 1, which would result in heat loss and affect the waste heat recovery efficiency.

[0039] like Figure 2 As shown, the bottom of the cleaning block 141 is inclined, and the inclined surface of the cleaning block 141 is opposite to the air outlet of the hot air inlet pipe 5. When hot air is blown out from the hot air inlet pipe 5, due to inertia and airflow direction, particulate impurities will directly hit the inclined surface of the cleaning block 141 and then flow downwards, which can avoid the hot air directly scouring the baffle 2 and extend the service life of the baffle 2.

[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hot air waste heat recovery device, characterized in that: The filter includes a filter box, which is equipped with a partition that divides the interior of the filter box into an air guide chamber and a filter chamber from left to right. A hot air inlet pipe communicating with the air guide chamber is provided on one side of the filter box, and a heat exchanger body is provided on the other side of the filter box. The hot air inlet of the heat exchanger body is communicating with the filter chamber. A through hole communicating with the air guide chamber and the filter chamber is provided at the lower part of the partition, and a filter screen is provided at the through hole. A filter assembly is detachably provided in the filter chamber. A drain pipe communicating with the air guide chamber is provided at the bottom of the filter box, and a drain valve is provided on the drain pipe.

2. The hot air waste heat recovery device according to claim 1, characterized in that: The filter assembly includes a cover plate, a first connecting plate, a filter cage, a second connecting plate, and a dust collection tray. The bottom of the cover plate is connected to the top of the filter cage through the first connecting plate, and the bottom of the filter cage is connected to the dust collection tray through the second connecting plate. The first connecting plate and the second connecting plate are arranged opposite to each other. The top of the filter box has an opening communicating with the filter chamber. The cover plate is adapted to the opening, and the filter assembly is removably installed in the filter chamber through the opening.

3. The hot air waste heat recovery device according to claim 2, characterized in that: The filter cage is equipped with filter media.

4. A hot air waste heat recovery device according to claim 3, characterized in that: The filter media is activated carbon.

5. A hot air waste heat recovery device according to claim 2, characterized in that: A first sealing ring is provided at the connection between the cover plate and the filter box, and a locking assembly is provided on the top of the filter box for locking the cover plate to the opening.

6. A hot air waste heat recovery device according to claim 5, characterized in that: The locking assembly includes a threaded post, a clamping block, and a locking nut. One end of the threaded post is fixed to the top of the filter box. The clamping block has a through hole that matches the threaded post. The clamping block is movably fitted onto the threaded post through the through hole. The locking nut is threadedly connected to the threaded post and is located above the clamping block. By tightening the locking nut, the clamping block can be pressed against the top of the cover plate.

7. A hot air waste heat recovery device according to claim 6, characterized in that: The locking assembly is provided in two parts, and the two locking assemblies are arranged symmetrically.

8. A hot air waste heat recovery device according to claim 1, characterized in that: It also includes a cleaning assembly, which includes a cleaning block and a cleaning cylinder. The size of the cleaning block is adapted to the air guide chamber. The cleaning block is movably disposed in the air guide chamber. The cleaning cylinder is fixed to the top of the filter box. The telescopic rod of the cleaning cylinder extends into the air guide chamber and connects to the cleaning block.

9. A hot air waste heat recovery device according to claim 8, characterized in that: A second sealing ring is provided at the connection between the extension rod of the cleaning cylinder and the filter box.

10. A hot air waste heat recovery device according to claim 8, characterized in that: The bottom of the cleaning block is inclined, and the inclined surface of the cleaning block is opposite to the air outlet of the hot air input pipe.

Images