Flue gas waste heat recycling device

Abstract

The utility model belongs to the technical field of flue gas waste heat recycling, and relates to a flue gas waste heat recycling device which comprises a recycling box, the right side of the recycling box is communicated with a connecting pipe, the right side of the connecting pipe is fixedly connected with a connecting flange, an inner cavity of the recycling box is provided with a snakelike coil pipe, and the surface of the snakelike coil pipe is fixedly connected with a heat conducting piece. A filtering assembly is arranged on the right side of an inner cavity of the recycling box and comprises a filtering net, the filtering net is arranged on the right side of the inner cavity of the recycling box, a collecting groove is formed in the position, located at the bottom of the filtering net, of the bottom of the inner cavity of the recycling box, and a collecting box is slidably connected to the position, located on one side of the collecting groove, of the bottom of the recycling box through a sliding rail. The utility model discloses a flue gas waste heat recycling device and aims to provide a flue gas waste heat recycling device which solves the problems of low heat exchange efficiency, easiness in blockage, difficulty in maintenance and the like in the prior art by optimizing a heat exchange structure and arranging a self-cleaning filtering system, and particularly aims to improve the flue gas waste heat recycling efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas waste heat recovery technology, and relates to a flue gas waste heat recovery and recirculation device. Background Technology

[0002] With the rapid development of industrial production, the direct emission of large amounts of high-temperature flue gas not only wastes energy but also causes thermal pollution to the environment. Traditional flue gas waste heat recovery systems suffer from problems such as low heat exchange efficiency, easy blockage, and difficult maintenance.

[0003] In existing technologies, flue gas waste heat recovery devices often use simple heat exchange tube structures, which cannot effectively utilize the waste heat in the flue gas. Moreover, after long-term operation, the heat exchange surface is prone to dust accumulation, resulting in a sharp decline in heat exchange efficiency. In addition, the filters of existing devices are mostly static designs, which cannot achieve self-cleaning functions and require frequent shutdowns for maintenance, which seriously affects production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is that in the prior art, the waste heat recovery device of flue gas often adopts a simple heat exchange tube structure, which cannot effectively utilize the waste heat in the flue gas. Moreover, after long-term operation, the heat exchange surface is prone to dust accumulation, which leads to a sharp decline in heat exchange efficiency. In addition, the filters of the existing devices are mostly static designs, which cannot achieve self-cleaning function and require frequent shutdowns for maintenance, which seriously affects production efficiency.

[0005] The present invention discloses a flue gas waste heat recovery and recirculation device, comprising a recovery box, a connecting pipe connected to the right side of the recovery box, a connecting flange fixedly connected to the right side of the connecting pipe, a serpentine coil provided in the inner cavity of the recovery box, heat-conducting plates fixedly connected to the surface of the serpentine coil, and a filter assembly provided in the right side of the inner cavity of the recovery box.

[0006] The filter assembly includes a filter screen, which is located on the right side of the inner cavity of the recycling bin. A collection groove is formed at the bottom of the inner cavity of the recycling bin, located at the bottom of the filter screen. A collection box is slidably connected to the bottom of the recycling bin on one side of the collection groove via a slide rail. Limiting frames are respectively set on the front and rear sides of the right side of the inner cavity of the recycling bin. A scraper is set on the right side of the filter screen. An L-shaped connecting plate is fixedly connected to the right side of the scraper. A rectangular spray head is set at the lower part of the L-shaped connecting plate. A conveying pipe is connected to the right side of the rectangular spray head. A water pump A is connected to the lower part of the conveying pipe. A water pipe is connected to the front side of the water pump A. A water tank is connected to the front side of the water pipe. A drive plate is fixedly connected to the front and rear sides of the right side of the rectangular spray head.

[0007] Each of the drive plates is respectively set in the inner cavity of the limiting frame. A drive motor is fixedly connected to the upper right side of the recycling box. The output shaft of the drive motor passes through the recycling box. A lead screw is rotatably connected to the upper part of one of the inner cavities of the frame through a bearing. The lead screw is fixedly connected to the output shaft of the drive motor.

[0008] The surface of the lead screw is threadedly connected to one of the drive plates, and the other drive plate is slidably connected to the inner wall of another limiting frame.

[0009] A connector is fixedly connected to the front side of the serpentine coil, and a one-way valve A is fixedly connected to the side of the serpentine coil near the connector. A water pump B is connected to the rear side of the serpentine coil, and a one-way valve B is fixedly connected to the side of the serpentine coil near the water pump B. A spray hose is connected to the upper part of the water pump B.

[0010] The upper left side of the recycling bin is connected to an exhaust chimney.

[0011] Compared with the prior art, the beneficial effects of this utility model are: it aims to provide a flue gas waste heat recovery and recirculation device, which solves the problems of low heat exchange efficiency, easy clogging and difficult maintenance in the prior art by optimizing the heat exchange structure and setting a self-cleaning filter system. The specific objectives include: 1. improving the flue gas waste heat recovery efficiency; 2. realizing automatic cleaning of the filter components; 3. extending the equipment maintenance cycle. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0014] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 4 This is an exploded structural diagram of the present invention;

[0016] Figure 5 This is a schematic diagram of the filter screen structure in this utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the water pump A in this utility model.

[0018] In the diagram: 1. Recycling bin; 2. Connecting pipe; 3. Connecting flange; 4. Snake coil; 5. Heat-conducting plate; 6. Filter screen; 7. Collection box; 8. Limiting frame; 9. Scraper; 10. L-shaped connecting plate; 11. Rectangular spray head; 12. Delivery pipe; 13. Water pump A; 14. Water pipe; 15. Water tank; 16. Drive plate; 17. Drive motor; 18. Lead screw; 19. Connector; 20. One-way valve A; 21. Water pump B; 22. One-way valve B; 23. Spray hose; 24. Exhaust chimney. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0021] 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.

[0022] Example 1

[0023] like Figures 1-5 As shown, the device includes a recycling bin 1, a connecting pipe 2 connected to the right side of the recycling bin 1, a connecting flange 3 fixedly connected to the right side of the connecting pipe 2, a serpentine coil 4 installed inside the recycling bin 1, a heat-conducting plate 5 fixedly connected to the surface of the serpentine coil 4, and a filter assembly installed on the right side of the inner cavity of the recycling bin 1.

[0024] A connector 19 is fixedly connected to the front side of the serpentine coil 4. A one-way valve A20 is fixedly connected to the side of the serpentine coil 4 near the connector 19. A water pump B21 is connected to the rear side of the serpentine coil 4. A one-way valve B22 is fixedly connected to the side of the serpentine coil 4 near the water pump B21. A spray hose 23 is connected to the upper part of the water pump B21.

[0025] The upper left side of the recovery box 1 is connected to the exhaust chimney 24. The connecting flange 3 is sealed to the external flue gas pipe to ensure that the flue gas conveying channel is unobstructed. The medium of the serpentine coil 4 is connected to the external water supply pipe 14 through the connector 19. The one-way valve A20 is opened to inject the working medium water into the serpentine coil 4. After the water is injected, the one-way valve A20 is closed. During the waste heat recovery stage, the high temperature flue gas enters the inner cavity of the recovery box 1 through the connecting pipe 2. The heat of the flue gas is transferred in sequence through the following path: the heat-conducting plate 5 absorbs the heat energy of the flue gas, and the heat is conducted to the copper tube wall of the serpentine coil 4. The copper tube transfers the heat to the internal working medium. The cooled flue gas is discharged through the exhaust chimney 24. During the heat energy utilization stage, after the working medium is heated to the set temperature, the one-way valve B22 is opened and the water pump B21 is started. The water pump B21 extracts the hot water in the serpentine coil 4. The hot water is delivered to the external container through the spray hose 23.

[0026] Example 2

[0027] like Figures 3-6 As shown, the filter assembly includes a filter screen 6, which is located on the right side of the inner cavity of the recycling bin 1. A collection trough is provided at the bottom of the inner cavity of the recycling bin 1, located at the bottom of the filter screen 6. A collection box 7 is slidably connected to the bottom of the recycling bin 1 on one side of the collection trough via a slide rail. Limiting frames 8 are respectively provided on the front and rear sides of the right side of the inner cavity of the recycling bin 1. A scraper 9 is provided on the right side of the filter screen 6. An L-shaped connecting plate 10 is fixedly connected to the right side of the scraper 9. A rectangular spray head 11 is provided at the lower part of the L-shaped connecting plate 10. A conveying pipe 12 is connected to the right side of the rectangular spray head 11. A water pump A13 is connected to the lower part of the conveying pipe 12. A water pipe 14 is connected to the front side of the water pump A13. A water tank 15 is connected to the front side of the water pipe 14. A drive plate 16 is fixedly connected to the front and rear sides of the right side of the rectangular spray head 11.

[0028] Each drive plate 16 is respectively set in the inner cavity of the limiting frame 8. The upper right side of the recycling box 1 is fixedly connected to the drive motor 17. The output shaft of the drive motor 17 passes through the recycling box 1. The upper part of one of the inner cavities of the frame is rotatably connected to the lead screw 18 through the bearing. The lead screw 18 is fixedly connected to the output shaft of the drive motor 17.

[0029] The lead screw 18 is threadedly connected to one of the drive plates 16, and the other drive plate 16 is slidably connected to the inner wall of another limiting frame 8. High-temperature flue gas enters the inner cavity of the recovery box 1 through the connecting pipe 2. The flue gas first passes through the horizontally arranged filter screen 6, which intercepts solid particles in the flue gas. The intercepted particles naturally slide down to the collection box 7 under the action of gravity. The water pump A13 is started to draw the cleaning liquid from the water tank 15. The cleaning liquid is then transported to the water pump A through the water pipe 14, and then to the rectangular spray head 11 through the conveying pipe 12. The rectangular spray head 11 sprays the cleaning liquid evenly onto the filter screen. The filter screen 6 is covered with cleaning solution to ensure that the cleaning solution soaks the attached particles and reduces their adhesion. The drive motor 17 is started simultaneously, and its output shaft drives the lead screw 18 to rotate. The rotational motion of the lead screw 18 is converted into the linear motion of the drive plate 16. The drive plate 16 drives the L-shaped connecting plate 10 to move. The L-shaped connecting plate 10 pushes the scraper 9 to move along the surface of the filter screen 6. The scraper 9 scrapes the loosened particles off the surface of the filter screen 6. The mixture of the removed particles and cleaning solution falls down the slope of the filter screen 6. The mixture passes through the guide channel opened at the bottom of the recycling box 1 and finally collects in the pull-out collection box 7.

[0030] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A flue gas heat recovery recirculation device, characterized by: The system includes a recycling bin (1), a connecting pipe (2) connected to the right side of the recycling bin (1), a connecting flange (3) fixedly connected to the right side of the connecting pipe (2), a serpentine coil (4) provided in the inner cavity of the recycling bin (1), a heat-conducting plate (5) fixedly connected to the surface of the serpentine coil (4), and a filter assembly provided on the right side of the inner cavity of the recycling bin (1).

2. A flue gas heat recovery recirculation device according to claim 1, characterised in that: The filter assembly includes a filter screen (6), which is located on the right side of the inner cavity of the recycling box (1). A collection groove is provided at the bottom of the inner cavity of the recycling box (1) at the bottom of the filter screen (6). A collection box (7) is slidably connected to the bottom of the recycling box (1) on one side of the collection groove via a slide rail. Limiting frames (8) are respectively provided on the front and back sides of the right side of the inner cavity of the recycling box (1). A scraper (9) is provided on the right side of the filter screen (6). An L-shaped connecting plate (10) is fixedly connected to the right side of the scraper (9). A rectangular spray head (11) is provided at the lower part of the L-shaped connecting plate (10). A conveying pipe (12) is connected to the right side of the rectangular spray head (11). A water pump A (13) is connected to the lower part of the conveying pipe (12). A water pipe (14) is connected to the front side of the water pump A (13). A water tank (15) is connected to the front side of the water pipe (14). A drive plate (16) is fixedly connected to the front and back sides of the right side of the rectangular spray head (11).

3. A flue gas heat recovery recirculation device according to claim 2, characterised in that: Each of the drive plates (16) is respectively set in the inner cavity of the limiting frame (8). A drive motor (17) is fixedly connected to the upper right side of the recycling box (1). The output shaft of the drive motor (17) passes through the recycling box (1). A lead screw (18) is rotatably connected to the upper part of the inner cavity of one of the frames through a bearing. The lead screw (18) is fixedly connected to the output shaft of the drive motor (17).

4. The flue gas waste heat recovery and recirculation device according to claim 3, characterized in that: The surface of the lead screw (18) is threadedly connected to one of the drive plates (16), and the other drive plate (16) is slidably connected to the inner wall of another limiting frame (8).

5. A flue gas heat recovery recirculation device according to claim 1, characterized in that: A connector (19) is fixedly connected to the front side of the serpentine coil (4). A one-way valve A (20) is fixedly connected to the side of the serpentine coil (4) near the connector (19). A water pump B (21) is connected to the rear side of the serpentine coil (4). A one-way valve B (22) is fixedly connected to the side of the serpentine coil (4) near the water pump B (21). A spray hose (23) is connected to the upper part of the water pump B (21).

6. A flue gas heat recovery recirculation device according to claim 5, characterised in that: The upper left side of the recycling bin (1) is connected to the exhaust chimney (24).

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