Waste heat recovery device for garbage power plant

Abstract

The utility model discloses a waste heat recovery device for a waste power plant, which relates to the technical field of waste incineration power generation facilities, comprises a device main body and a dust removal box, and is characterized in that the back of the dust removal box is connected with a mounting bin, and the outer surface of the device main body is connected with a dismounting bin; guide grooves are formed in the upper portions and the lower portions of the interiors of the mounting bin and the dismounting bin correspondingly. Through the arrangement of the dust collecting groove, the water outlet groove, the dust conveying groove, the dust pushing frame and the hydraulic cylinder, most of dust blocked by the filter screen falls into the dust collecting groove under the influence of gravity, the dust is guided into the dust conveying groove through the dust collecting groove, then the hydraulic cylinder is opened and closed once at set intervals, and the hydraulic cylinder is started to drive the dust pushing frame to move so as to enable the dust conveying groove to move. Along with the movement of the ash pushing frame, the ash conveying groove can firstly move to the position between the ash collecting groove and the ash discharging groove; and dust in the dust removal box can be discharged without shutdown, so that the phenomenon that the dust removal box is full of dust or needs to be shut down for cleaning is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of waste incineration power generation facilities, specifically a waste heat recovery device for waste power plants. Background Technology

[0002] Waste-to-energy plants, also known as waste incineration power plants, are a method of waste disposal. The heat generated from incinerating waste produces steam for power generation, supplying electricity to nearby residents and businesses. During incineration, a large amount of flue gas is produced, containing various toxic and harmful substances as well as heat. Direct emission into the atmosphere would cause significant environmental pollution, thus requiring flue gas treatment. One method is waste heat recovery, where the heat from the flue gas is used to recycle waste water, reducing the waste of thermal resources.

[0003] A waste-to-energy plant waste heat recovery device, application number 202121748916.7, includes a waste heat recovery bin and a dust filter box. A spiral heat exchange tube is fixedly installed at the bottom of the inner wall of the waste heat recovery bin. The bottom end of the spiral heat exchange tube extends out of the waste heat recovery bin and is fixedly connected to the dust filter box. A waste gas inlet pipe is fixedly connected to the side of the dust filter box away from the waste heat recovery bin. A cleaning groove is opened at the top of the dust filter box, and multiple evenly distributed filter frames are inserted inside the cleaning groove. This waste heat recovery device uses a spiral heat exchange tube for heat exchange, which increases the circulation time of combustion waste gas in the waste heat recovery bin and increases the heat exchange area, thereby significantly improving the efficiency of waste heat recovery. Simultaneously, the addition of a dust filter box allows for multi-layer filtration of the incoming waste gas before waste heat recovery, effectively avoiding the clogging of the spiral heat exchange tube and making maintenance and cleaning more convenient and simple.

[0004] This technical solution uses a filter screen in a dust filter box to block dust in the flue gas, thereby preventing the heat exchange tubes from being blocked by dust. However, the blocked dust is still inside the dust filter box, which can easily cause blockage and affect the flow of flue gas over time. Therefore, it is necessary to shut down the machine regularly to clean the filter screen and the dust inside the box, which affects the flue gas treatment efficiency. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a waste heat recovery device for waste-to-energy plants to solve the technical problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for a waste-to-energy plant, comprising a main body and a dust collection box, characterized in that: an installation chamber is connected to the back of the dust collection box, and a disassembly chamber is connected to the outer surface of the main body; guide grooves are provided at the top and bottom of the installation and disassembly chambers; maintenance doors are hinged to both sides of the back of the installation chamber and both sides of the outer surface of the disassembly chamber; a guide frame is connected to the top of the dust collection box, and an outer frame is connected inside the guide frame; high-temperature resistant magnets are installed on the inner wall of the dust collection box and the inner wall of the outer frame; an ash collection trough is provided inside the dust collection box; a hydraulic cylinder is installed at the bottom of the dust collection box, and an ash pushing frame is connected to the output end of the hydraulic cylinder; an ash feeding trough is provided at the top of the ash pushing frame; and an ash discharge trough is provided at the bottom of the dust collection box.

[0007] By adopting the above technical solution, most of the dust blocked by the filter screen will fall into the dust collection trough due to gravity. The dust is then guided into the dust delivery trough. Afterwards, the hydraulic cylinder opens and closes periodically. When the hydraulic cylinder is activated, it drives the dust pusher to move, thereby shifting the dust delivery trough. As the dust pusher moves, the dust delivery trough first moves to between the dust collection trough and the dust discharge trough. At this point, the dust delivery trough is not connected to the dust collection trough and the dust discharge trough, preventing flue gas from sequentially passing through them. Then, as the dust pusher continues to move, the dust delivery trough moves above the dust discharge trough, causing the dust to fall into the dust discharge trough and be discharged from the bottom. After the hydraulic cylinder closes, it pulls the dust pusher back, moving the dust delivery trough further away from the dust collection trough. Remove the ash trough and align it with the ash collection trough to prepare for the next ash discharge. When the filter screen is severely clogged or damaged, open the maintenance door at the back of the installation chamber and place the new outer frame and filter screen into the guide channel of the installation chamber. Then push the new outer frame forward to allow the new outer frame and filter screen to enter the dust collection box. At this time, the new outer frame will press against the old outer frame, causing the old outer frame and filter screen to be pushed into the guide channel in the disassembly chamber. At the same time, the guide frame will limit the new outer frame to prevent it from shifting left or right, and the high-temperature magnet will limit the new outer frame to reduce the occurrence of forward or backward displacement. Then close the maintenance door of the installation chamber and open the maintenance door of the disassembly chamber. After that, remove the old outer frame and filter screen and close the maintenance door of the disassembly chamber.

[0008] Furthermore, the outer frame is provided in three parts, and each of the three outer frames is equipped with a filter screen.

[0009] By adopting the above technical solution, the flue gas will pass through three filters in sequence as it passes through the dust collection box. The three filters will block the dust in the flue gas, thereby completing the separation of impurities.

[0010] Furthermore, the outer frame is slidably connected to the guide groove and the guide frame respectively, and the outer frame is detachably connected to the dust removal box, the installation chamber and the disassembly chamber.

[0011] By adopting the above technical solution, the new outer frame is pushed forward to allow the new outer frame and the new filter to enter the dust collection box. At this time, the new outer frame presses against the old outer frame, causing the old outer frame and the old filter to be pushed into the guide groove in the disassembly chamber.

[0012] Furthermore, the top of the ash collection trough is sloping, and the length and width of the bottom of the ash collection trough are equal to the length and width of the ash discharge trough and the ash delivery trough.

[0013] By adopting the above technical solution, when the dust collector is filtering dust in the flue gas, most of the dust blocked by the filter screen will fall into the dust collection trough due to gravity. The dust is then guided into the ash conveying trough through the dust collection trough. After the ash conveying trough moves above the ash discharge trough, the dust falls into the ash discharge trough and is discharged from the bottom of the ash discharge trough.

[0014] Furthermore, there are three ash collection troughs, three ash discharge troughs, and three ash delivery troughs, and the three ash discharge troughs are staggered with the three ash collection troughs.

[0015] By adopting the above technical solution, as the ash pusher moves, the ash feeding trough will first move to the space between the ash receiving trough and the ash discharging trough. At this time, the ash feeding trough is not connected to the ash receiving trough and the ash discharging trough, so as to prevent the flue gas from passing through the ash receiving trough, the ash feeding trough and the ash discharging trough in sequence and being discharged. Then, as the ash pusher continues to move, the ash feeding trough moves to the top of the ash discharging trough, so that the dust falls into the ash discharging trough and is discharged from the bottom of the ash discharging trough.

[0016] Furthermore, the ash pusher is slidably connected to the dust collection box.

[0017] By adopting the above technical solution, the hydraulic cylinder drives the ash pusher to move after starting, thereby moving the ash feeding trough. As the ash pusher moves, it can push out the dust in the dust collection box.

[0018] Furthermore, an air inlet is provided on one side of the main body of the device, and a dust collector is connected to one side of the air inlet. A water inlet is provided on the upper side of the other side of the main body of the device. An air outlet is provided on the top of the main body of the device. A water outlet is provided on the lower surface of the outer surface of the main body of the device.

[0019] By adopting the above technical solution, the flue gas enters the dust collector from the left side of the dust collector, and then passes through the dust collector and enters the main body of the device through the air inlet. After entering the main body of the device, the flue gas is discharged from the air outlet. At the same time, external water enters the main body of the device through the water inlet and is discharged from the water outlet. This allows the high-heat flue gas and the room-temperature water to exchange heat inside the main body of the device, recovering the heat in the flue gas and transferring it to the water, thereby lowering the temperature of the flue gas and raising the temperature of the water.

[0020] Furthermore, the installation compartment is equipped with three push racks, which are equidistantly distributed.

[0021] By adopting the above technical solution, since there are three pushers, each can correspond to one of the three filters, thus facilitating the pushing of the three filters.

[0022] Furthermore, the pusher is slidably connected to the inspection door, and the pusher abuts against the outer frame.

[0023] By adopting the above technical solution, the staff closes the maintenance door of the installation chamber, and then pushes the pusher forward so that the pusher abuts against the back of the new outer frame, allowing the new outer frame and the new filter to enter the dust collection box.

[0024] In summary, the present invention has the following main advantages:

[0025] 1. This utility model, through the arrangement of a dust collection trough, a water discharge trough, a dust conveying trough, a dust pusher, and a hydraulic cylinder, ensures that most of the dust blocked by the filter screen falls into the dust collection trough due to gravity. The dust is then guided into the dust conveying trough. The hydraulic cylinder opens and closes periodically. When the hydraulic cylinder is activated, it drives the dust pusher to move, thereby shifting the dust conveying trough. As the dust pusher moves, the dust conveying trough first moves between the dust collection trough and the dust discharge trough. At this point, the dust conveying trough is not connected to the dust collection trough and the dust discharge trough, preventing flue gas from sequentially passing through them. Then, as the dust pusher continues to move, the dust conveying trough moves above the dust discharge trough, causing the dust to fall into the ash discharge trough and be discharged from the bottom. After the hydraulic cylinder closes, the dust pusher is pulled back, moving the dust conveying trough away from the dust discharge trough and aligning it with the dust collection trough again, ready for the next dust discharge. This allows for the discharge of dust from the dust collector without stopping the machine, preventing the dust collector from becoming clogged with dust or requiring a shutdown for cleaning.

[0026] 2. This utility model, through the design of an installation chamber, a disassembly chamber, an inspection door, a guide groove, a guide frame, a shell, and a high-temperature resistant magnet, allows for easy replacement of damaged or clogged filters when the filter is severely clogged. When the filter is damaged, the inspection door at the back of the installation chamber is opened, and a new outer frame and filter are placed into the guide groove of the installation chamber. The new outer frame is then pushed forward to allow it and the filter to enter the dust collection box. The new outer frame presses against the old outer frame, pushing the old frame and filter into the guide groove of the disassembly chamber. Simultaneously, the guide frame limits the new outer frame, preventing lateral displacement, and the high-temperature resistant magnet further limits its movement, reducing forward and backward displacement. The inspection door of the installation chamber is then closed, and the inspection door of the disassembly chamber is opened. The old outer frame and filter are then removed, and the inspection door of the disassembly chamber is closed. The filter can be disassembled and reassembled without stopping the machine, facilitating the replacement of damaged or clogged filters for cleaning.

[0027] 3. This utility model uses a pusher frame. After the new outer frame is placed into the guide groove of the installation chamber, the maintenance door of the installation chamber can be closed. Then, the pusher frame is pushed forward so that it abuts against the back of the new outer frame, thereby pushing the new outer frame into the dust collection box to replace the old outer frame and the old filter screen. This makes it easy to push the outer frame to facilitate the replacement operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the back structure of the dust collector box of this utility model;

[0030] Figure 3 This is a schematic cross-sectional view of the dust collector box of this utility model;

[0031] Figure 4 This is a side sectional view of the dust collector box of this utility model;

[0032] Figure 5 This is a schematic diagram of the ash pusher structure of this utility model.

[0033] In the diagram: 1. Main body of the device; 2. Air inlet; 3. Air outlet; 4. Water inlet; 5. Water outlet; 6. Dust collector; 7. Installation chamber; 8. Disassembly chamber; 9. Inspection door; 10. Guide trough; 11. Guide frame; 12. Outer frame; 13. Filter screen; 14. High-temperature resistant magnet; 15. Ash collection trough; 16. Ash discharge trough; 17. Ash conveying trough; 18. Ash pusher; 19. Hydraulic cylinder; 20. Pusher frame. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The embodiments of this utility model will be described below based on its overall structure.

[0036] Example 1:

[0037] A waste heat recovery device for waste-to-energy plants, such as Figures 1-5As shown, the device includes a main body 1 and a dust collection box 6. An installation chamber 7 is connected to the back of the dust collection box 6, and a disassembly chamber 8 is connected to the outer surface of the main body 1. Guide grooves 10 are provided at the top and bottom of the interior of both the installation chamber 7 and the disassembly chamber 8. Inspection doors 9 are hinged to both sides of the back of the installation chamber 7 and both sides of the outer surface of the disassembly chamber 8 for easy replacement of the outer frame 12 and filter screen 13. A guide frame 11 is connected to the top of the interior of the dust collection box 6, and an outer frame 12 is connected inside the guide frame 11. The outer frame 12 is slidably connected to the guide grooves 10 and the guide frame 11, respectively. The outer frame 12 is detachably connected to the dust collection box 6, the installation chamber 7, and the disassembly chamber 8. The guide frame 11 limits the new outer frame 12, preventing lateral displacement. High-temperature resistant magnets 14 are installed on the inner walls of the dust collection box 6 and the outer frame 12, limiting the new outer frame 12 and reducing front-to-back displacement.

[0038] The dust collector 6 has an internal dust collection trough 15 with a sloping top. Most of the dust blocked by the filter screen 13 falls into the dust collection trough 15 due to gravity, and is then guided into the dust conveying trough 16. A hydraulic cylinder 19 is installed at the bottom of the dust collector 6, and a dust pusher 18 is connected to the output end of the hydraulic cylinder 19. The dust pusher 18 is slidably connected to the dust collector 6. When the hydraulic cylinder 19 is activated, it drives the dust pusher 18 to move, thereby moving the dust conveying trough 17. The dust pusher 18 has a dust conveying trough 17 at its top, and the dust collector 6 has a dust discharge trough 16 at its bottom. The length and width of the bottom of the dust collection trough 15 are the same as those of the dust discharge trough 16. The length and width of the ash feeding trough 17 are equal. There are three ash receiving troughs 15, three ash discharging troughs 16, and three ash feeding troughs 17. The three ash discharging troughs 16 and the three ash receiving troughs 15 are staggered. As the ash pushing frame 18 moves, the ash feeding trough 17 will first move between the ash receiving trough 15 and the ash discharging trough 16. At this time, the ash feeding trough 17 is not connected to the ash receiving trough 15 and the ash discharging trough 16 to prevent the flue gas from passing through the ash receiving trough 15, the ash feeding trough 17 and the ash discharging trough 16 in sequence and being discharged. Then, as the ash pushing frame 18 continues to move, the ash feeding trough 17 moves above the ash discharging trough 16, so that the dust falls into the ash discharging trough 16 and is discharged from the bottom of the ash discharging trough 16.

[0039] See Figure 1 , Figure 3 and Figure 4In the above embodiment, three outer frames 12 are provided, and filters 13 are installed inside each of the three outer frames 12. An air inlet 2 is provided on one side of the main body 1 of the device. The dust collection box 6 is connected to one side of the air inlet 2. The flue gas enters the dust collection box 6 from the left side. Then, the flue gas passes through the dust collection box 6 and enters the main body 1 of the device through the air inlet 2. During the process of passing through the dust collection box 6, the flue gas will pass through the three filters 13 in sequence. The three filters 13 block the dust in the flue gas, thereby completing the separation of impurities. A water inlet 4 is provided on the upper side of the other side of the main body 1. An air outlet 3 is provided on the top of the main body 1. A water outlet 5 is provided on the lower outer surface of the main body 1. After the flue gas enters the main body 1, it is discharged from the air outlet 3. At the same time, the external water flows into the main body 1 from the water inlet 4 and then discharges from the water outlet 5. This allows the high-heat flue gas and the room-temperature water to exchange heat inside the main body 1, recovering the heat in the flue gas and transferring it to the water, thereby lowering the temperature of the flue gas and raising the temperature of the water.

[0040] Example 2:

[0041] Based on the above embodiment 1, the following settings are made to facilitate pushing the outer casing 12.

[0042] See Figure 2 and Figure 4 In the above embodiment, the installation chamber 7 is provided with three pusher frames 20, which are equidistantly distributed. The pusher frames 20 are slidably connected to the inspection door 9 and abut against the outer frame 12. When the staff pushes the pusher frame 20 forward, the pusher frame 20 abuts against the back of the new outer frame 12, so that the new outer frame 12 and the new filter screen 13 enter the dust collection box 6.

[0043] The implementation principle of this utility model is as follows: First, the flue gas enters the dust collector 6 from the left side of the dust collector 6. Then, the flue gas passes through the dust collector 6 and enters the main body 1 of the device through the air inlet 2. During the process of passing through the dust collector 6, the flue gas will pass through three filters 13 in sequence. The dust in the flue gas is blocked by the three filters 13, thereby completing the separation of impurities. After the flue gas enters the main body 1 of the device, it is discharged from the air outlet 3. At the same time, the external water flow enters the main body 1 of the device through the water inlet 4 and is discharged from the water outlet 5. The high-heat flue gas and the room-temperature water flow exchange heat inside the main body 1, recovering the heat in the flue gas and transferring it to the water flow, thereby reducing the temperature of the flue gas and increasing the temperature of the water flow.

[0044] When the dust collector 6 filters dust from the flue gas, most of the dust blocked by the filter screen 13 will fall into the dust collection trough 15 due to gravity. The dust is then guided into the dust conveying trough 16 through the dust collection trough 15. After that, the hydraulic cylinder 19 opens and closes once every once in a while. When the hydraulic cylinder 19 is started, it drives the dust pusher 18 to move, thereby moving the dust conveying trough 17. As the dust pusher 18 moves, the dust conveying trough 17 will first move between the dust collection trough 15 and the dust discharge trough 16. At this time, the dust conveying trough 16... 7 is not connected to the ash collection trough 15 and the ash discharge trough 16 to prevent flue gas from passing through the ash collection trough 15, the ash conveying trough 17 and the ash discharge trough 16 in sequence and being discharged. Then, as the ash pusher 18 continues to move, the ash conveying trough 17 moves to the top of the ash discharge trough 16, so that the dust falls into the ash discharge trough 16 and is discharged from the bottom of the ash discharge trough 16. After the hydraulic cylinder 19 is closed, the ash pusher 18 is pulled back, so that the ash conveying trough 17 is away from the ash discharge trough 16 and is aligned with the ash collection trough 15 again, in preparation for the next ash discharge.

[0045] It should be noted that there are two main methods for controlling the opening and closing of the hydraulic cylinder 19 at regular intervals: one is manual operation by the staff, and the other is to install a timer in the control cabinet and use an electronic control method to automatically control the opening and closing of the hydraulic cylinder 19.

[0046] When the filter 13 is severely clogged or damaged, the staff opens the maintenance door 9 on the back of the installation chamber 7. Then, the staff puts the new outer frame 12 and the filter 13 into the guide groove 10 of the installation chamber 7. After putting them in, the staff closes the maintenance door 9 of the installation chamber 7. Then, the staff pushes the pusher 20 forward so that the pusher 20 abuts against the back of the new outer frame 12, so that the new outer frame 12 and the new filter 13 enter the dust collection box 6. At this time, the new outer frame 12 abuts against the old outer frame 12, so that the old outer frame 12 and the old filter 13 are pushed into the guide groove 10 in the disassembly chamber 8. At the same time, the guide 11 limits the new outer frame 12 to prevent the new outer frame 12 from shifting left and right, and the high temperature resistant magnet 14 limits the new outer frame 12 to reduce the occurrence of the new outer frame 12 shifting forward and backward. Then, the staff opens the maintenance door 9 of the disassembly chamber 8, takes out the old outer frame 12 and the old filter 13, and closes the maintenance door 9 of the disassembly chamber 8.

[0047] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A waste heat recovery device for a waste-to-energy plant, comprising a main body (1) and a dust collection box (6), characterized in that: The dust collector (6) is connected to an installation chamber (7) on its back, and a disassembly chamber (8) is connected to the outer surface of the main body (1). Guide grooves (10) are provided at the top and bottom of the installation chamber (7) and the disassembly chamber (8). Inspection doors (9) are hinged to both sides of the back of the installation chamber (7) and both sides of the outer surface of the disassembly chamber (8). A guide frame (11) is connected to the top of the dust collector (6), and an outer frame (12) is connected inside the guide frame (11). High-temperature resistant magnets (14) are installed on the inner wall of the dust collector (6) and the inner wall of the outer frame (12). A dust collection trough (15) is provided inside the dust collector (6). A hydraulic cylinder (19) is installed at the bottom of the dust collector (6), and a ash pusher (18) is connected to the output end of the hydraulic cylinder (19). A ash feeding trough (17) is provided at the top of the ash pusher (18), and an ash discharge trough (16) is provided at the bottom of the dust collector (6).

2. The waste-to-energy plant waste heat recovery device according to claim 1, characterized in that: The outer frame (12) is provided in three parts, and each of the three outer frames (12) is equipped with a filter screen (13).

3. The waste-to-energy plant waste heat recovery device according to claim 2, characterized in that: The outer frame (12) is slidably connected to the guide groove (10) and the guide frame (11) respectively, and the outer frame (12) is detachably connected to the dust removal box (6), the installation chamber (7) and the disassembly chamber (8).

4. The waste-to-energy plant waste heat recovery device according to claim 1, characterized in that: The top of the ash collection trough (15) is sloping, and the length and width of the bottom of the ash collection trough (15) are equal to the length and width of the ash discharge trough (16) and the ash delivery trough (17).

5. The waste-to-energy plant waste heat recovery device according to claim 4, characterized in that: The ash collection trough (15), ash discharge trough (16) and ash delivery trough (17) are each provided in threes, and the three ash discharge troughs (16) and the three ash collection troughs (15) are distributed alternately.

6. The waste-to-energy plant waste heat recovery device according to claim 1, characterized in that: The dust pusher (18) is slidably connected to the dust collection box (6).

7. The waste-to-energy plant waste heat recovery device according to claim 1, characterized in that: An air inlet (2) is provided on one side of the main body (1) of the device, and a dust collector (6) is connected to one side of the air inlet (2). A water inlet (4) is provided on the upper side of the other side of the main body (1). An air outlet (3) is provided on the top of the main body (1). A water outlet (5) is provided on the lower surface of the outer surface of the main body (1).

8. The waste-to-energy plant waste heat recovery device according to claim 1, characterized in that: The installation compartment (7) is equipped with three push racks (20), and the three push racks (20) are equidistantly distributed.

9. The waste-to-energy plant waste heat recovery device according to claim 8, characterized in that: The pusher (20) is slidably connected to the inspection door (9), and the pusher (20) abuts against the outer frame (12).

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