A waste heat recovery device for exhaust gas from a coal-fired power plant

Abstract

This utility model discloses a waste heat recovery device for exhaust gas from a coal-fired power plant, belonging to the field of waste heat recovery technology. A heat exchanger, a filter shell, and a filter box are installed on the upper part of the base plate. The heat exchanger is located in the middle and is interconnected with both the filter shell and the filter box. An installation hole is drilled at the upper end of the filter box, and an installation plate is installed inside the installation hole. Three evenly distributed guide rail grooves are drilled on the front and rear inner walls of the installation hole. A filtration mechanism is installed within the guide rail grooves. Two symmetrical cleaning mechanisms are installed within the base plate, located within and in contact with the guide rail grooves. Each cleaning mechanism includes a sliding plate with three cleaning blocks at its outer end that match the guide rail grooves. Cleaning brushes are fixedly connected to the outer ends of the cleaning blocks. Two symmetrical through holes are drilled at the upper end of the sliding plate, allowing for the cleaning of residual solid particles within the guide rail grooves. This facilitates the subsequent reinstallation of the filtration mechanism into the guide rail grooves, improving the work efficiency of the technicians.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and more specifically, to a waste heat recovery device for exhaust gas from a coal-fired power plant. Background Technology

[0002] Chinese patent CN202320670946.3 discloses a "Waste Heat Recovery Device for Power Plants" (authorization announcement number CN219674261U). The device includes a base plate with a heat exchanger on top. A filter box is connected to the left side of the heat exchanger via a conduit. The bottom of the filter box is fixed to the left side of the top of the base plate. This invention fixes the base plate to the area where it is needed. Flue gas is then transported to the filter box via an external pipe. The filter box contains a metal filter screen, a high-temperature resistant filter plate, and a glass fiber filter plate, which sequentially filter the airflow, blocking and collecting solid particles and impurities. This multi-layer filtration of the incoming waste gas before waste heat recovery effectively avoids blockage of the heat exchanger tubes. The heat from the heat exchanger heats the water inside. When hot water is needed, an external solenoid valve opens a liquid guide pipe, which delivers hot water to the filter shell. The filter in the filter shell filters and blocks the hot water, facilitating the filtration of hot water for waste heat utilization.

[0003] However, when maintaining the above-mentioned utility model, it is necessary to remove the metal filter screen, high-temperature resistant filter plate and glass fiber filter plate. When removing them, the remaining solid particles may remain inside the guide rail, which is not easy to clean. If the solid particles are not removed in time, it will affect the subsequent installation of the metal filter screen, high-temperature resistant filter plate and glass fiber filter plate, thereby reducing the filtration effect of the filter box.

[0004] Therefore, this application provides a waste heat recovery device for exhaust gas from a coal-fired power plant to solve the problems mentioned in the background art. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a waste heat recovery device for exhaust gas from coal-fired power plants, so as to solve the technical problem of how to clean the solid particles remaining in the guide rail groove. Utility Model Content

[0007] A waste heat recovery device for coal-fired power plant exhaust gas includes a base plate. A heat exchanger, a filter shell, and a filter box are mounted on the upper part of the base plate. The heat exchanger is located in the middle and communicates with both the filter shell and the filter box. An installation hole is drilled at the upper end of the filter box, and an installation plate is installed within the installation hole. Three evenly distributed guide grooves are drilled on the front and rear inner walls of the installation hole. A filtration mechanism is installed within each guide groove. Two symmetrical cleaning mechanisms are located within and in contact with the guide grooves. Each cleaning mechanism includes a sliding plate with three cleaning blocks matching the guide grooves at its outer end. Cleaning brushes are fixedly connected to the outer ends of the cleaning blocks. Two symmetrical through holes are drilled at the upper end of the sliding plate. Four limiting guide rods matching the through holes are fixedly connected to the bottom of the base plate. This allows for the cleaning of residual solid particles within the guide grooves, facilitating the reinstallation of the filtration mechanism into the guide grooves and improving the work efficiency of technicians.

[0008] As a further improvement of this utility model, the filter box is fixedly connected to both the front and rear ends with collection frames. The collection frames are inclined near the side wall of the filter box. By setting the collection frames, when the cleaning mechanism slides upward to the mounting hole, the solid particles accumulated on the cleaning mechanism can be poured into the collection frames to collect the cleaned solid particles.

[0009] As a further improvement of this utility model, the bottom of the collection frame is provided with a receiving paper. By providing the receiving paper, the particles in the collection frame can be received, and technicians can easily remove the receiving paper to remove the particles from the collection frame.

[0010] As a further improvement of this utility model, the sliding plate has a hand-touch groove at the end away from the cleaning block, and the inner wall of the hand-touch groove is engraved with anti-slip texture. By setting the hand-touch groove, technicians can easily slide the cleaning mechanism upward along the limiting guide rod, thereby improving the cleaning efficiency of the guide groove.

[0011] As a further improvement of this utility model, the outer end of the filter mechanism is provided with two symmetrical pre-reserved slots. By setting the pre-reserved slots, the filter mechanism can be fully contacted with the cleaning mechanism after being inserted into the guide rail slot, thereby reducing the large gap between the filter mechanism and the cleaning mechanism and reducing the overall filtration effect of the filter box.

[0012] Optionally, the sliding plate has a mounting groove matching the cleaning block at one end near the cleaning block. Rubber pads are fixedly connected to the upper and lower inner walls of the mounting groove. By setting the mounting groove and rubber pads, the sliding plate can be quickly disassembled and installed with the cleaning block, which facilitates the replacement of the cleaning block and cleaning brush by technicians.

[0013] 3. Beneficial effects

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. This device is equipped with a cleaning mechanism, which can efficiently clean the solid particles remaining in the guide rail groove. After disassembling the filter mechanism, technicians can quickly remove the residue in the guide rail groove by simply operating the cleaning mechanism, which facilitates the reinstallation of the filter mechanism. This design significantly reduces the time and manpower required for cleaning and improves the work efficiency of technicians.

[0016] 2. The filtration mechanism and cleaning mechanism of this device achieve close contact through the cooperation of the reserved groove and the cleaning block. This design effectively reduces the gap between the filtration mechanism and the cleaning mechanism, avoiding the problem of reduced filtration effect caused by excessive gap. At the same time, the cleaning brush can also clean the filtration mechanism to a certain extent during the cleaning of the guide rail groove, further improving the filtration effect of the entire filter box.

[0017] 3. The sliding plate and cleaning block of this device are quickly disassembled and installed through the mounting groove and rubber pad, which makes it convenient for technicians to replace the cleaning block and cleaning brush. At the same time, the collection frame can effectively collect the cleaned solid particles, and the receiving paper makes it easy for technicians to clean them. These designs together simplify the maintenance process and reduce maintenance costs. Attached Figure Description

[0018] Figure 1 This is a perspective view of the entire utility model;

[0019] Figure 2 This is a perspective view of the filter box portion of this utility model;

[0020] Figure 3 This is a perspective view of the interior of the filter box of this utility model;

[0021] Figure 4 This is a perspective view of the cleaning mechanism portion of this utility model;

[0022] Figure 5 This is an exploded view of the cleaning mechanism of this utility model;

[0023] Figure 6 This is a perspective view of the collection frame portion of this utility model;

[0024] Figure 7 This is a perspective view of the filtration mechanism of this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1. Base plate; 2. Heat exchanger; 3. Filter shell; 4. Filter box; 401. Collection frame; 402. Receiving paper; 5. Mounting hole; 6. Guide rail groove; 7. Filter mechanism; 701. Reserved groove; 8. Cleaning mechanism; 9. Sliding plate; 901. Hand touch groove; 902. Mounting groove; 903. Rubber pad; 10. Cleaning block; 11. Cleaning brush; 12. Through hole; 13. Limiting guide rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example:

[0031] Please see Figures 1-5A waste heat recovery device for coal-fired power plant exhaust gas includes a base plate 1. A heat exchanger 2, a filter shell 3, and a filter box 4 are installed on the upper end of the base plate 1. The heat exchanger 2 is located in the middle and is interconnected with both the filter shell 3 and the filter box 4. An installation hole 5 is drilled at the upper end of the filter box 4, and an installation plate is installed inside the installation hole 5. Three evenly distributed guide grooves 6 are drilled on the front and rear inner walls of the installation hole 5. A filtration mechanism 7 is installed within the guide grooves 6. Two symmetrical cleaning mechanisms 8 are installed inside the base plate 1, located within the guide grooves 6 and connected to the guide grooves 7. The guide rail grooves 6 are in contact with each other. The cleaning mechanism 8 includes a sliding plate 9. The outer end of the sliding plate 9 is provided with three cleaning blocks 10 that match the guide rail grooves 6. The outer end of the cleaning blocks 10 is fixedly connected with a cleaning brush 11. The upper end of the sliding plate 9 has two symmetrical through holes 12. The bottom end of the base plate 1 is fixedly connected with four limiting guide rods 13 that match the through holes 12. This can clean the solid particles remaining in the guide rail grooves, thereby facilitating the reinstallation of the subsequent filter mechanism into the guide rail grooves and improving the work efficiency of technicians.

[0032] Please see Figures 2-3 and Figure 6 Collection frames 401 are fixedly connected to both the front and rear ends of the filter box 4. The side wall of the collection frame 401 near the filter box 4 is set in an inclined shape. By setting the collection frame 401, when the cleaning mechanism 8 slides upward to the opening of the mounting hole 5, the solid particles accumulated on the cleaning mechanism 8 can be poured into the collection frame 401 to collect the cleaned solid particles. The bottom of the collection frame 401 is provided with a receiving paper 402. By setting the receiving paper 402, the particles in the collection frame 401 can be received, and it is convenient for technicians to remove the receiving paper 402 to remove the particles from the collection frame 401.

[0033] Please see Figures 4-5 The sliding plate 9 has a hand-touch groove 901 at the end away from the cleaning block 10. The inner wall of the hand-touch groove 901 is engraved with anti-slip texture. By setting the hand-touch groove 901, technicians can easily slide the cleaning mechanism 8 upward along the limit guide rod 13, thereby improving the cleaning efficiency of the guide rail groove 6. The sliding plate 9 has an installation groove 902 that matches the cleaning block 10 at the end near the cleaning block 10. Rubber pads 903 are fixedly connected to the upper and lower inner walls of the installation groove 902. By setting the installation groove 902 and the rubber pads 903, the sliding plate 9 can be quickly disassembled and installed with the cleaning block 10, thereby facilitating the replacement of the cleaning block 10 and the cleaning brush 11 by technicians.

[0034] Please see Figure 7 The outer end of the filter mechanism 7 has two symmetrical reserved grooves 701. By setting the reserved grooves 701, the filter mechanism 7 can be fully contacted with the cleaning mechanism 8 after being inserted into the guide rail groove 6, thereby reducing the large gap between the filter mechanism 7 and the cleaning mechanism 8 and reducing the filtration effect of the entire filter box 4.

[0035] Working principle: When using this device, the technician removes the mounting plate from the mounting hole 5, then slides the filter mechanism 7 upward along the guide rail groove 6. The technician then reaches into the hand-touching groove 901 and lifts the sliding plate 9 upward, causing the sliding plate 9 to slide upward along the limiting guide rod 13. During this process, the cleaning block 10 and cleaning brush 11 are used to clean the solid particles remaining on the inner wall of the guide rail groove 6, and the accumulated solid particles on the sliding plate 9 are poured into the collection frame 401. Compared with the prior art, this utility model can clean the solid particles remaining in the guide rail groove, thereby facilitating the subsequent reinstallation of the filter mechanism into the guide rail groove and improving the work efficiency of the technician.

[0036] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A waste heat recovery device for exhaust gas from a coal-fired power plant, comprising a base plate (1), characterized in that, A heat exchanger (2), a filter shell (3), and a filter box (4) are installed on the upper end of the base plate (1). The heat exchanger (2) is located in the middle and is connected to the filter shell (3) and the filter box (4) respectively. An installation hole (5) is drilled at the upper end of the filter box (4). An installation plate is provided in the installation hole (5). Three evenly distributed guide grooves (6) are drilled on the front and rear inner walls of the installation hole (5). A filter mechanism (7) is provided in the guide groove (6). Two symmetrical cleaning mechanisms are provided in the base plate (1). 8) The cleaning mechanism (8) is located in the guide rail groove (6) and is in contact with the guide rail groove (6). The cleaning mechanism (8) includes a sliding plate (9). The outer end of the sliding plate (9) is provided with three cleaning blocks (10) that match the guide rail groove (6). The outer end of the cleaning block (10) is fixedly connected with a cleaning brush (11). The upper end of the sliding plate (9) has two symmetrical through holes (12). The bottom end of the base plate (1) is fixedly connected with four limiting guide rods (13) that match the through holes (12).

2. The waste heat recovery device for coal-fired power plant exhaust gas according to claim 1, characterized in that, The filter box (4) is fixedly connected to a collection frame (401) at both the front and rear ends, and the side wall of the collection frame (401) near the filter box (4) is set in an inclined shape.

3. The waste heat recovery device for coal-fired power plant exhaust gas according to claim 2, characterized in that, The bottom of the collection box (401) is provided with a receiving paper (402).

4. The waste heat recovery device for coal-fired power plant exhaust gas according to claim 1, characterized in that, The sliding plate (9) has a hand-touch groove (901) at the end away from the cleaning block (10), and the inner wall of the hand-touch groove (901) is engraved with anti-slip texture.

5. The waste heat recovery device for coal-fired power plant exhaust gas according to claim 1, characterized in that, The outer end of the filter mechanism (7) has two symmetrical reserved grooves (701).

6. The waste heat recovery device for coal-fired power plant exhaust gas according to claim 1, characterized in that, The sliding plate (9) has a mounting groove (902) that matches the cleaning block (10) at one end. The upper and lower inner walls of the mounting groove (902) are fixedly connected with rubber pads (903).

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