Waste heat recycling device for tail flue gas of power plant boiler

Abstract

The utility model relates to the technical field of power plant boiler waste heat recycling equipment, in particular to a power plant boiler tail smoke waste heat recycling device which comprises a box body, one side of the box body is communicated with an air inlet pipe, a water inlet pipe and a water outlet pipe, and the other side of the box body is communicated with an air outlet pipe. A heat conversion frame is inserted along one side of the box body in a sealed mode, detachable heat conduction copper pipes are evenly arranged in the heat conversion frame, a driving frame is inserted in the top of the box body, and cleaning assemblies used for cleaning accumulated dust on the inner walls of the heat conduction copper pipes are evenly arranged in the driving frame. And meanwhile, through the removable heat conversion frame and the detachable heat conduction copper pipe, a worker can conveniently replace the heat conduction copper pipe, and then the practical effect of the device is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery and utilization equipment for power plant boilers, specifically a waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler. Background Technology

[0002] Waste heat recovery devices are widely used in various types of steam boilers and hot water boilers, especially suitable for boilers with high flue gas temperatures (generally, the effect is more obvious when the flue gas temperature is 200℃ or above). In power plants, chemical plants, steel plants and other places that require a large amount of heat energy, waste heat recovery devices are widely used.

[0003] For example, the waste heat boiler utilization device of a gas turbine power plant disclosed in patent publication number CN220397568U can filter and collect dust and debris in flue gas, and the filter box can be disassembled to clean the dust and debris, making it convenient to use; and lime water can be sprayed onto the flue gas through the spray pipe and nozzle to perform desulfurization and denitrification treatment on the flue gas.

[0004] However, the above-mentioned equipment uses heat exchange copper tubes to transport flue gas and thus recover waste heat. However, if the heat exchange copper tubes are not cleaned or replaced in time, dust containing chemical substances will often accumulate on their inner walls. Over time, this will affect the heat exchange efficiency of the heat exchange copper tubes and reduce the working efficiency of the device. Therefore, we urgently need a waste heat recovery and reuse device for flue gas at the tail end of power plant boilers. Utility Model Content

[0005] One of the technical problems this application aims to solve is to facilitate the timely cleaning and replacement of heat-conducting copper pipes.

[0006] To address the aforementioned technical problems, this application provides a waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler, comprising a housing. An air inlet pipe, a water inlet pipe, and a water outlet pipe are respectively connected to one side of the housing, and an air outlet pipe is connected to the other side of the housing. A heat conversion frame is sealed and inserted along one side of the housing. Removable heat-conducting copper pipes are evenly arranged inside the heat conversion frame. A drive frame is inserted into the top of the housing, and cleaning components for cleaning the accumulated ash on the inner wall of the heat-conducting copper pipes are evenly arranged inside the drive frame.

[0007] In some embodiments, in order to guide the heat conversion frame when it is inserted into the box, the heat conversion frame is made of rubber, and T-shaped plates are fixedly installed on both sides of the inner wall of the box. T-shaped slots that are inserted into the T-shaped plates are opened on both sides of the heat conversion frame, and handles are symmetrically fixedly installed on one side surface of the heat conversion frame.

[0008] In some embodiments, in order to seal the heat exchange frame with the inner wall of the box to prevent water leakage, two sealing grooves are provided at one end of the heat exchange frame, and two sealing blocks are fixedly installed on one side of the inner wall of the box, with the sealing blocks inserted into the sealing grooves.

[0009] In some embodiments, in order to further secure the heat exchange frame, a limiting plate is symmetrically fixedly installed on one end surface of the heat exchange frame, and mounting plates that fit against the limiting plate are distributed and fixedly installed on one side surface of the housing.

[0010] In some embodiments, in order to seal both ends of the heat-conducting copper tube by means of the sealing plate, the sealing plate is made of rubber, and the sealing plate is fixedly installed at both ends of the heat-conducting copper tube. The sealing plate is fixedly connected to the heat conversion frame, and heat dissipation fins are linearly and uniformly welded on the heat-conducting copper tube.

[0011] In some embodiments, in order to facilitate the removal of the drive frame by the operator, a plug ring is fixedly installed at the bottom of the drive frame, the plug ring is tightly inserted into the inner wall of the housing, positioning plates are fixedly installed on both outer wall surfaces of the drive frame, and fixing plates that fit against the positioning plates are fixedly installed on both outer wall surfaces of the top of the housing.

[0012] In some embodiments, in order to provide driving force to the rotation of the drive screw and the driven screw through the drive motor, the cleaning assembly includes a drive motor, a drive screw, a driven screw, and a guide rod. The drive motor is fixedly installed at the top of the drive frame. There are two driven screws. The drive screw and the two driven screws are triangularly distributed and inserted into the heat-conducting copper pipe. The upper ends of the drive screw and the driven screw both penetrate through the bottom end of the drive frame into the interior of the drive frame. The top end of the driven screw is rotatably connected to the interior of the drive frame. The top end of the drive screw is fixedly connected to the output end of the drive motor.

[0013] In some embodiments, in order to guide the movement of the scraper, a synchronous sprocket is fixedly installed on the drive screw and the two driven screws, and a synchronous chain is sleeved on the outside of the three synchronous sprockets. The guide rod is distributed and fixedly installed on the bottom surface of the drive frame, and the guide rod is inserted into the heat-conducting copper pipe. A scraper is meshed and sleeved on both the drive screw and the driven screw, and the guide rod is inserted into the scraper.

[0014] This utility model has at least the following beneficial effects: This device can regularly clean the internal dust of the heat-conducting copper tube through the cleaning component, thereby preventing the heat exchange efficiency of the heat-conducting copper tube from decreasing after long-term use. At the same time, the removable heat conversion frame and the detachable heat-conducting copper tube make it easy for staff to replace the heat-conducting copper tube, thereby improving the practical effect of this device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the position of the air outlet pipe of this utility model;

[0017] Figure 3 This is a schematic diagram showing the position of the air intake pipe of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the box body of this utility model;

[0019] Figure 5 This is a schematic diagram of the cleaning component of this utility model;

[0020] Figure 6 This is a schematic diagram showing the position of the sealing groove in this utility model;

[0021] Figure 7 This is a schematic diagram showing the position of the sealing block of this utility model;

[0022] Figure 8 This is a schematic diagram showing the position of the guide rod of this utility model.

[0023] In the diagram: 1. Housing; 2. Air inlet pipe; 3. Water inlet pipe; 4. Water outlet pipe; 5. Air outlet pipe; 6. Heat transfer frame; 7. Heat-conducting copper pipe; 8. Drive frame; 9. Cleaning assembly; 901. Drive motor; 902. Drive screw; 903. Driven screw; 904. Guide rod; 905. Synchronous sprocket; 906. Synchronous chain; 907. Scraper; 10. T-shaped plate; 11. T-slot; 12. Handle; 13. Sealing groove; 14. Sealing block; 15. Limiting plate; 16. Mounting plate; 17. Sealing plate; 18. Heat dissipation fins; 19. Insertion ring; 20. Positioning plate; 21. Fixing plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1-8 This utility model provides a technical solution: a waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler, including a box 1. An air inlet pipe 2, a water inlet pipe 3, and a water outlet pipe 4 are respectively connected to one side of the box 1. An air outlet pipe 5 is connected to the other side of the box 1. A heat conversion frame 6 is sealed and inserted along one side of the box 1. Removable heat-conducting copper pipes 7 are evenly arranged inside the heat conversion frame 6. A drive frame 8 is inserted into the top of the box 1. A cleaning component 9 for cleaning the ash accumulated on the inner wall of the heat-conducting copper pipes 7 is evenly arranged inside the drive frame 8.

[0026] Example 2: As Figure 6 and Figure 7 As shown, the heat exchange frame 6 is made of rubber. T-shaped plates 10 are fixedly installed on both sides of the inner wall of the box 1. T-shaped grooves 11 that are inserted into the T-shaped plates 10 are opened on both sides of the heat exchange frame 6. Handles 12 are symmetrically fixedly installed on one side of the heat exchange frame 6. Two sealing grooves 13 are opened at one end of the heat exchange frame 6. Two sealing blocks 14 are fixedly installed on one side of the inner wall of the box 1. The sealing blocks 14 are inserted into the sealing grooves 13. Limiting plates 15 are symmetrically fixedly installed on one side of the heat exchange frame 6. Mounting plates 16 that fit with the limiting plates 15 are fixedly installed on one side of the box 1. When it is necessary to replace the heat-conducting copper pipe 7, the worker inserts the heat exchange frame 6 with the new heat-conducting copper pipe 7 into the box 1. At this time, the limiting insertion of the T-shaped plates 10 and the T-shaped grooves 11 can guide the heat exchange frame 6. At the same time, the insertion of the sealing grooves 13 and the sealing blocks 14 can achieve the sealing between the heat exchange frame 6 and the box 1.

[0027] Both the limiting plate 15 and the mounting plate 16 have multiple slots so that when the heat conversion frame 6 is inserted into the box 1, the limiting plate 15 and the mounting plate 16 can be fixed with appropriate bolts, thereby reinforcing the heat conversion frame 6. The heat conversion frame 6 is made of rubber and has a certain degree of deformation, so that when it is inserted into the box 1, a sealed connection can be achieved between it and the inner wall of the box 1.

[0028] Example 3: As Figure 6 As shown, sealing plates 17 are fixedly installed at both ends of the heat-conducting copper pipe 7. The sealing plates 17 are fixedly connected to the heat conversion frame 6. Heat dissipation fins 18 are welded linearly and uniformly on the heat-conducting copper pipe 7. The design of the heat dissipation fins 18 can increase the heat dissipation efficiency of the heat-conducting copper pipe 7. The sealing plates 17 are fixed to the heat conversion frame 6 with screws, which makes it easy for the staff to disassemble the heat-conducting copper pipe 7.

[0029] Example 4: Figure 8As shown, a plug ring 19 is fixedly installed at the bottom of the drive frame 8. The plug ring 19 is tightly inserted into the inner wall of the housing 1. Positioning plates 20 are fixedly installed on both outer wall surfaces of the drive frame 8. Fixing plates 21 that fit with the positioning plates 20 are fixedly installed on both outer wall surfaces of the top of the housing 1. This allows the drive frame 8 to be removed when the worker needs to replace the heat-conducting copper pipe 7. The positioning plates 20 on the drive frame 8 and the fixing plates 21 on the housing 1 are both provided with slots. The worker can connect them with appropriate bolts to tightly install the drive frame 8 on the housing 1.

[0030] Example 5: Figure 5 As shown, the cleaning assembly 9 includes a drive motor 901, a drive screw 902, a driven screw 903, and a guide rod 904. The drive motor 901 is fixedly installed at the top of the drive frame 8. There are two driven screws 903. The drive screw 902 and the two driven screws 903 are arranged in a triangle and inserted into the heat-conducting copper pipe 7. The upper ends of the drive screw 902 and the driven screw 903 both penetrate through the bottom end of the drive frame 8 into the interior of the drive frame 8. The top end of the driven screw 903 is rotatably connected to the interior of the drive frame 8. The top end of the drive screw 902 is fixedly connected to the output end of the drive motor 901. There are four cleaning assemblies 9 in this device. The drive screw 902 can be rotated by turning on the drive motor 901.

[0031] Example 6: As Figure 5 As shown, synchronous sprockets 905 are fixedly mounted on the drive screw 902 and the two driven screws 903. A synchronous chain 906 is fitted around the three synchronous sprockets 905. Guide rods 904 are distributed and fixedly mounted on the bottom surface of the drive frame 8. The guide rods 904 are inserted into the heat-conducting copper pipe 7. Scrapers 907 are meshed and fitted on both the drive screw 902 and the driven screws 903. The guide rods 904 are inserted into the scrapers 907. With the cooperation of the synchronous sprockets 905 and the synchronous chain 906, the drive screw 902 can drive the driven screws 903 to rotate synchronously. The synchronous chains 906 in the two adjacent cleaning components 9 are symmetrically staggered to avoid collisions between them. At the same time, the guide rod 904 guides the scraper 907, enabling it to rise and fall stably and scrape the inner wall of the heat-conducting copper pipe 7. When the gas is introduced into the chamber 1, the scraper 907 is located at the top of the chamber 1 to avoid affecting the gas flow into the heat-conducting copper pipe 7. The gas that has undergone heat exchange is discharged into the purification tower through the exhaust pipe 5 for purification.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler, comprising a housing (1), wherein an air inlet pipe (2), a water inlet pipe (3), and a water outlet pipe (4) are respectively connected to one side of the housing (1), and an air outlet pipe (5) is connected to the other side of the housing (1), characterized in that: A heat exchange frame (6) is sealed and inserted along one side of the box (1). A detachable heat-conducting copper pipe (7) is uniformly arranged inside the heat exchange frame (6). A drive frame (8) is inserted into the top of the box (1). A cleaning component (9) for cleaning the dust accumulated on the inner wall of the heat-conducting copper pipe (7) is uniformly arranged inside the drive frame (8).

2. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 1, characterized in that: The heat conversion rack (6) is made of rubber. T-shaped plates (10) are fixedly installed on both sides of the inner wall of the box (1). T-shaped grooves (11) that are inserted into the T-shaped plates (10) are opened on both sides of the heat conversion rack (6). Handles (12) are symmetrically fixedly installed on one side surface of the heat conversion rack (6).

3. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 1, characterized in that: Two sealing grooves (13) are provided at one end of the heat conversion rack (6), and two sealing blocks (14) are fixedly installed on the inner wall of one side of the box (1). The sealing blocks (14) are inserted into the sealing grooves (13).

4. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 1, characterized in that: One end surface of the heat conversion rack (6) is symmetrically fixedly mounted with a limiting plate (15), and one side surface of the box (1) is fixedly mounted with mounting plates (16) that fit against the limiting plate (15).

5. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 1, characterized in that: Both ends of the heat-conducting copper tube (7) are fixedly installed with sealing plates (17), and the sealing plates (17) are fixedly connected to the heat conversion frame (6). Heat dissipation fins (18) are welded linearly and uniformly on the heat-conducting copper tube (7).

6. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 1, characterized in that: A plug ring (19) is fixedly installed at the bottom end of the drive frame (8). The plug ring (19) is tightly inserted into the inner wall of the housing (1). Positioning plates (20) are fixedly installed on both outer wall surfaces of the drive frame (8). Fixing plates (21) that fit with the positioning plates (20) are fixedly installed on both outer wall surfaces of the top end of the housing (1).

7. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 6, characterized in that: The cleaning assembly (9) includes a drive motor (901), a drive screw (902), a driven screw (903), and a guide rod (904). The drive motor (901) is fixedly installed at the top of the drive frame (8). There are two driven screws (903). The drive screw (902) and the two driven screws (903) are triangularly distributed and inserted into the heat-conducting copper pipe (7). The upper ends of the drive screw (902) and the driven screw (903) both penetrate through the bottom end of the drive frame (8) into the interior of the drive frame (8). The top end of the driven screw (903) is rotatably connected to the interior of the drive frame (8). The top end of the drive screw (902) is fixedly connected to the output end of the drive motor (901).

8. The waste heat recovery and reuse device for flue gas at the tail end of a power plant boiler according to claim 7, characterized in that: Synchronous sprockets (905) are fixedly installed on the drive screw (902) and the two driven screws (903). A synchronous chain (906) is sleeved on the outside of the three synchronous sprockets (905). The guide rods (904) are distributed and fixedly installed on the bottom surface of the drive frame (8). The guide rods (904) are inserted into the heat-conducting copper pipe (7). Scrapers (907) are meshed on the drive screw (902) and the driven screws (903). The guide rods (904) are inserted into the scrapers (907).

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