Boiler waste heat recycling device

Abstract

The utility model relates to the technical field of waste heat recovery, and provides a boiler waste heat recycling device which comprises a bottom plate and a heat exchange pipe, the top end of the bottom plate is connected with a filter box and a heat exchange chamber, the heat exchange pipe is located in the heat exchange chamber, the two ends of the heat exchange pipe penetrate through the heat exchange chamber, and the inner side wall of the heat exchange chamber is connected with a threaded rod. The threaded rod is in threaded connection with a threaded ring, the outer wall of the threaded ring is connected with a connecting rod, the connecting rod is rotationally connected with a sweeping ring, the sweeping ring sleeves the heat exchange pipe, the inner lower side wall of the heat exchange chamber is rotationally connected with a lower rotating ring, the inner upper side wall of the heat exchange chamber is rotationally connected with an upper rotating ring, and a control rod is connected between the upper rotating ring and the lower rotating ring; the control rod is connected with the connecting rod, a gear ring is arranged on the outer wall of the upper rotating ring, a motor is installed at the top end of the heat exchange chamber, and the output end of the motor penetrates through the heat exchange chamber to be connected with a gear, so that the heat exchange pipe is convenient to clean, dust falling or impurity adhesion is avoided, and the purpose of improving the heat exchange efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically to a boiler waste heat recovery and utilization device. Background Technology

[0002] In my country, coal is the primary fuel for power plant boilers. Because the sulfur content in my country's thermal coal is relatively high, the SO2 content in boiler flue gas is also relatively high.

[0003] A search revealed a patent publication number CN219756416U published on September 26, 2023, for a power plant boiler flue gas waste heat recovery and utilization device. The device is broadly described as including a boiler, a filter box on the right side of the boiler, a first conveying pipe connecting the filter box to the boiler interior, an air pump on the right side of the filter box, a water pump and a water pump outside the heat exchange chamber, a second water supply pipe connected to the water pump inlet, an inlet pipe connected to the water pump inlet, one end of the inlet pipe connected to one end of the heat exchange tube, an outlet pipe connected to the water pump inlet, one end of the outlet pipe connected to the other end of the heat exchange tube, and the first water supply pipe connected to the water pump outlet. This device, with the cooperation of two sets of filter screens with different filter holes and an activated carbon adsorption layer, can filter dust and impurities in the flue gas, thus preventing dust and impurities from adhering to the outer wall of the heat exchange tube during heat exchange, improving the heat exchange effect.

[0004] Although the existing technical solutions described above can filter dust and impurities in flue gas, dust or impurities inevitably accumulate on the heat exchange tubes during long-term use, which affects the heat exchange efficiency. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a boiler waste heat recovery and utilization device to solve the problem mentioned in the background technology that ash or impurities inevitably accumulate on the heat exchange tubes during long-term use, thus affecting the heat exchange efficiency.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a boiler waste heat recovery and utilization device, comprising a base plate and heat exchange tubes. A filter box and a heat exchange chamber are fixedly connected to the top of the base plate. A connecting pipe is provided between the heat exchange chamber and the filter box. One end of the filter box is provided with a flue gas inlet pipe. A flue gas outlet pipe is provided on the heat exchange chamber. The heat exchange tubes are located inside the heat exchange chamber, and both ends of the heat exchange tubes penetrate the heat exchange chamber. A threaded rod is fixedly connected to the inner wall of the heat exchange chamber, and the threaded rod is threaded with... The heat exchanger has a threaded ring, a connecting rod fixedly connected to the outer wall of the threaded ring, a cleaning ring rotatably connected to the connecting rod, and the cleaning ring is sleeved on the heat exchange tube. A lower rotating ring is rotatably connected to the lower inner wall of the heat exchange chamber, and an upper rotating ring is rotatably connected to the upper inner wall of the heat exchange chamber. A control rod is fixedly connected between the upper and lower rotating rings and is connected to the connecting rod. A toothed ring is provided on the outer wall of the upper rotating ring. A motor is installed at the top of the heat exchange chamber, and the output end of the motor passes through the heat exchange chamber and is connected to a gear that meshes with the toothed ring.

[0009] By adopting the above technical solution, water is introduced into the heat exchange tube, flowing in from one end and out from the other. Flue gas enters the heat exchange chamber through the inlet pipe, filter box, and connecting pipe, allowing the heat in the flue gas to be absorbed into the water in the heat exchange tube, thus recovering and utilizing the waste heat of the flue gas. The motor is started to drive the gear to rotate, which in turn drives the gear ring and upper rotating ring to rotate. The upper rotating ring drives the control rod and lower rotating ring to rotate, and the control rod drives the connecting rod and threaded ring to rotate, causing the threaded ring to move along the threaded rod. This causes the connecting rod to drive the cleaning ring to move in a spiral motion, thus cleaning the outer wall of the heat exchange tube. This facilitates the cleaning of the heat exchange tube, prevents dust or impurities from adhering, and improves the heat exchange efficiency.

[0010] Optionally, the top of the filter box is provided with three through slots, and filter plates are slidably connected inside the three through slots. The filter plates are in close contact with the inner side wall of the filter box, and the top of each of the three filter plates is provided with a top plate, the bottom of which is in close contact with the filter box.

[0011] By adopting the above technical solution, when the flue gas enters the filter box, the three filter plates work together to filter the flue gas, thereby removing impurities from the flue gas, reducing the impurities entering the heat exchange chamber, and reducing the impurities falling onto the heat exchange tubes, thus achieving the purpose of maintaining the heat exchange efficiency of the equipment.

[0012] Optionally, finger grooves are provided at the top of each of the three top plates.

[0013] By adopting the above technical solution, the finger groove is used to facilitate personnel to control the top plate, thereby facilitating personnel to control the filter plate.

[0014] Optionally, the top of the filter box is bolted to a cover plate, the bottom of the cover plate is in close contact with the top plate, and a sealing gasket is provided at the bottom of the cover plate, with the bottom of the sealing gasket in close contact with the filter box.

[0015] By adopting the above technical solution, the cover plate and the sealing gasket are used together to improve the sealing performance of the filter box and prevent flue gas from leaking out.

[0016] Optionally, the outer wall of the heat exchange chamber is provided with a heat insulation layer.

[0017] By adopting the above technical solution, the insulation layer is used to reduce the heat dissipation rate of the heat exchange chamber, thereby reducing heat consumption and improving the heat recovery and utilization rate.

[0018] (III) Beneficial Effects

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] This boiler waste heat recovery device introduces water into the heat exchange tubes, allowing water to flow in from one end and out from the other. Flue gas enters the heat exchange chamber through the inlet pipe, filter box, and connecting pipe, thus absorbing the heat from the flue gas into the water within the heat exchange tubes, thereby recovering and utilizing the waste heat from the flue gas. A motor is started, driving a gear to rotate. The gear drives a gear ring and an upper rotating ring to rotate, which in turn drives a control rod and a lower rotating ring to rotate. The control rod then drives a connecting rod and a threaded ring to rotate, causing the threaded ring to move along the threaded rod. This, in turn, causes the connecting rod to drive a cleaning ring to move in a spiral motion, cleaning the outer wall of the heat exchange tubes. This facilitates cleaning of the heat exchange tubes, prevents ash or impurities from adhering, and ultimately improves heat exchange efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first side view of the present invention;

[0022] Figure 2 This is a schematic diagram of the second side view of the present invention;

[0023] Figure 3 This is a first cross-sectional view of the present invention.

[0024] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0025] In the diagram: 1. Base plate; 2. Heat exchange tube; 3. Filter box; 4. Heat exchange chamber; 5. Connecting pipe; 6. Smoke inlet pipe; 7. Smoke outlet pipe; 8. Threaded rod; 9. Threaded ring; 10. Connecting rod; 11. Cleaning ring; 12. Lower rotating ring; 13. Upper rotating ring; 14. Control rod; 15. Gear ring; 16. Motor; 17. Gear; 18. Filter plate; 19. Top plate; 20. Finger groove; 21. Cover plate; 22. Sealing gasket; 23. Insulation layer. Detailed Implementation

[0026] 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.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-4A boiler waste heat recovery and utilization device includes a base plate 1 and heat exchange tubes 2. A filter box 3 and a heat exchange chamber 4 are fixedly connected to the top of the base plate 1. A connecting pipe 5 is provided between the heat exchange chamber 4 and the filter box 3. A flue gas inlet pipe 6 is provided at one end of the filter box 3. A flue gas outlet pipe 7 is provided on the heat exchange chamber 4. The heat exchange tubes 2 are located inside the heat exchange chamber 4, and both ends of the heat exchange tubes 2 penetrate the heat exchange chamber 4. A threaded rod 8 is fixedly connected to the inner wall of the heat exchange chamber 4, and a threaded ring is threaded onto the threaded rod 8. 9. A connecting rod 10 is fixedly connected to the outer wall of the threaded ring 9. A cleaning ring 11 is rotatably connected to the connecting rod 10. The cleaning ring 11 is sleeved on the heat exchange tube 2. A lower rotating ring 12 is rotatably connected to the lower inner wall of the heat exchange chamber 4. An upper rotating ring 13 is rotatably connected to the upper inner wall of the heat exchange chamber 4. A control rod 14 is fixedly connected between the upper rotating ring 13 and the lower rotating ring 12. The control rod 14 is connected to the connecting rod 10. A toothed ring 15 is provided on the outer wall of the upper rotating ring 13. The top of the heat exchange chamber 4... A motor 16 is installed at one end. The output end of the motor 16 passes through the heat exchange chamber 4 and is connected to a gear 17 that meshes with the gear ring 15. Water is introduced into the heat exchange tube 2, so that water flows in from one end of the heat exchange tube 2 and then flows out from the other end. Flue gas enters the heat exchange chamber 4 through the flue gas inlet pipe 6, filter box 3 and connecting pipe 5, so that the heat in the flue gas is absorbed into the water in the heat exchange tube 2, thereby recovering and utilizing the waste heat of the flue gas. The motor 16 is started to drive the gear 17 to rotate. The gear 17 drives the gear ring 15 and the upper rotating ring 13 to rotate. The upper rotating ring 13 drives the control rod 14 and the lower rotating ring 12 to rotate. The control rod 14 drives the connecting rod 10 and the threaded ring 9 to rotate, so that the threaded ring 9 moves along the threaded rod 8, so that the connecting rod 10 drives the cleaning ring 11 to move in a spiral motion, so that the cleaning ring 11 cleans the outer wall of the heat exchange tube 2, thereby facilitating the cleaning of the heat exchange tube 2, avoiding the accumulation of dust or impurities, and achieving the purpose of improving heat exchange efficiency.

[0029] Reference Figure 1 and Figure 3 The top of the filter box 3 has three through slots, and filter plates 18 are slidably connected inside the three through slots. The filter plates 18 are in close contact with the inner side wall of the filter box 3. The top of each of the three filter plates 18 is provided with a top plate 19, and the bottom of the top plate 19 is in close contact with the filter box 3. When the flue gas enters the filter box 3, the three filter plates 18 cooperate to filter the flue gas, thereby filtering out impurities in the flue gas, thereby reducing the impurities entering the heat exchange chamber 4, thereby reducing the impurities falling onto the heat exchange tube 2, thereby achieving the purpose of maintaining the heat exchange efficiency of the equipment.

[0030] Reference Figure 3 Each of the three top plates 19 has a finger groove 20 at its top. The finger groove 20 is used to facilitate personnel to control the top plate 19, thereby facilitating personnel to control the filter plate 18.

[0031] Reference Figure 1 and Figure 3The top of the filter box 3 is bolted to a cover plate 21. The bottom end of the cover plate 21 is in close contact with the top plate 19. A sealing gasket 22 is provided at the bottom end of the cover plate 21. The bottom end of the sealing gasket 22 is in close contact with the filter box 3. The cover plate 21 and the sealing gasket 22 cooperate to improve the sealing performance of the filter box 3 and prevent flue gas from leaking out.

[0032] Reference Figures 1-4 The heat exchange chamber 4 is provided with a heat insulation layer 23 on its outer wall. The heat insulation layer 23 is used to reduce the heat dissipation rate of the heat exchange chamber 4, thereby reducing heat consumption and improving the heat recovery and utilization rate.

[0033] In summary, the working principle and process of this boiler waste heat recovery device are as follows: First, water is introduced into heat exchange tube 2, flowing in from the inlet and out from the outlet. Flue gas enters heat exchange chamber 4 through inlet pipe 6, filter box 3, and connecting pipe 5, thus absorbing heat from the flue gas into the water in heat exchange tube 2, thereby recovering and utilizing the waste heat. The starting motor 16 drives gear 17 to rotate, which in turn drives gear ring 15 and upper rotating ring 13. Upper rotating ring 13 drives control rod 14 and lower rotating ring 12 to rotate, which in turn drives connecting rod 10 and threaded ring 9 to rotate. This causes threaded ring 9 to move along threaded rod 8, which in turn causes connecting rod 10 to drive cleaning ring 11 in a spiral motion, thus enabling cleaning ring 11 to perform heat exchange... The outer wall of tube 2 is cleaned to facilitate cleaning of heat exchange tube 2, avoid dust or impurities from adhering, and improve heat exchange efficiency. When flue gas enters the filter box 3, the three filter plates 18 work together to filter the flue gas, thereby filtering out impurities in the flue gas, reducing the impurities entering the heat exchange chamber 4, and reducing the impurities falling on the heat exchange tube 2, thus maintaining the heat exchange efficiency of the equipment. The finger groove 20 is used to facilitate personnel to control the top plate 19, thereby facilitating personnel to control the filter plates 18. The cover plate 21 works with the sealing gasket 22 to improve the sealing of the filter box 3 and prevent flue gas leakage. The heat insulation layer 23 is used to reduce the heat dissipation rate of the heat exchange chamber 4, thereby reducing heat consumption and improving the heat recovery and utilization rate.

[0034] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A boiler waste heat recovery device comprising a base plate (1), characterized in that: The utility model provides a filter box, heat exchange room, heat exchange pipe, thread rod, thread ring, connecting rod, cleaning ring, lower rotating ring, upper rotating ring, control rod, gear ring, motor and gear.

2. A boiler waste heat recovery device according to claim 1, characterized in that: The top of the filter box (3) is provided with three through grooves, and the inside of each through groove is slidably connected with a filter plate (18) which is tightly attached to the inner side wall of the filter box (3).

3. A boiler waste heat recovery device according to claim 2, characterized in that: The top of each filter plate (18) is provided with a top plate (19).

4. The boiler waste heat recovery device according to claim 1, characterized in that: The top of each top plate (19) is provided with a finger groove (20).

5. The boiler waste heat recovery device according to claim 1, characterized in that: The top of the filter box (3) is connected with a cover plate (21) by bolts, the bottom of the cover plate (21) is tightly attached to the top plate (19), the bottom of the cover plate (21) is provided with a sealing washer (22), and the bottom of the sealing washer (22) is tightly attached to the filter box (3). The outer wall of the heat exchange room (4) is provided with a heat insulation layer (23).

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