A waste heat recovery device for thermal power generation

Abstract

The utility model relates to the technical field of waste heat recovery, specifically a waste heat recovery device for thermal power generation, comprising a waste heat cylinder, a filter cartridge is fixedly arranged in the waste heat cylinder, the lower end of the waste heat cylinder is connected and fixedly provided with an exhaust pipe, the exhaust pipe extends upward and is inserted into the filter cartridge, a cover plate is provided at the waste heat cylinder and at the upper end portion of the filter cartridge, a screw is provided on the cover plate, a fixing cylinder is fixedly arranged at the lower end of the screw, a brush and a collecting groove are abutted against the outer peripheral portion of the filter cartridge, the upper end of the fixing cylinder is connected to the exhaust pipe which is evenly distributed, the exhaust pipe is connected and provided with a waste heat pipe, the waste heat pipe is spirally arranged on the outer periphery of the fixing cylinder downward, the lower end of the waste heat pipe extends outwardly and penetrates the waste heat cylinder, a water inlet pipe and a water outlet pipe are connected and fixed at the waste heat cylinder, dust in the exhaust gas can be filtered through the filter cartridge to prevent dust from adhering to the waste heat pipe, when more impurities are accumulated at the filter cartridge, the fixing cylinder can be pulled out, and the dust at the filter cartridge can be cleaned and collected through the brush and the collecting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for thermal power generation. Background Art

[0002] Thermal power generation is a way of generating electricity by using the heat energy generated by the combustion of combustibles and converting it into electrical energy through a power generation device. Thermal power generation produces a large amount of flue gas. Since the boiler uses coal as fuel, the flue gas contains a large amount of coal ash and coal slag. If it is directly discharged into the air, it will not only cause a large amount of heat waste, but also cause great pollution to the environment. With the continuous growth of energy demand and the improvement of environmental protection awareness, power plant waste heat recovery has become an important way of energy utilization.

[0003] The existing waste heat recovery equipment for thermal power generation has a limited heat dissipation area of ​​the flue gas pipe. Since the heat is diffused outward from the exhaust pipe, the heat exchange is incomplete and the heat transfer efficiency is poor. In addition, during use, since the flue gas contains a large amount of coal ash, it is easy to adhere to the pipe surface, affecting the heat exchange effect. Utility Model Content

[0004] The purpose of the utility model is to provide a waste heat recovery device for thermal power generation, which is used to overcome the above-mentioned defects in the prior art.

[0005] According to the utility model, a waste heat recovery device for thermal power generation comprises a waste heat cylinder, a filter cylinder is fixedly arranged in the waste heat cylinder, an exhaust pipe is connected and fixedly arranged at the lower end of the waste heat cylinder, the exhaust pipe extends upward and is inserted into the filter cylinder, a cover plate is provided at the waste heat cylinder and at the upper end part of the filter cylinder, hook claws uniformly distributed in the circumferential direction are fixedly arranged on the upper end surface of the cover plate, the hook claws are hung on the upper end part of the waste heat cylinder, a screw rod is provided on the cover plate, a fixing cylinder is fixedly arranged at the lower end of the screw rod, a brush and a collecting groove are provided at the lower end part of the fixing cylinder, the inner peripheral part of the brush abuts against the outer peripheral part of the filter cylinder, and a threaded sleeve which is threadedly matched and fixedly arranged is provided on the outer periphery of the screw rod. The upper end of the fixed cylinder is connected with an evenly distributed exhaust pipe, and the exhaust pipe is connected with a waste heat pipe, which is spirally arranged downward on the outer periphery of the fixed cylinder, and the lower end of the waste heat pipe extends outward to penetrate the waste heat cylinder, and the waste heat cylinder is connected with a water inlet pipe and a water outlet pipe distributed up and down, and the cover plate is provided with evenly distributed grooves, and a temperature sensor is fixed on the groove, and a temperature measuring block is connected with the lower end of the temperature sensor, and the lower end surface of the temperature measuring block is in close contact with the outer periphery of the exhaust pipe, and a liquid level valve and a drain valve are respectively provided on the water inlet pipe and the water outlet pipe, and the drain valve, the temperature sensor and the liquid level valve are all electrically connected to the control end at the outer end.

[0006] The beneficial effects of the utility model are:

[0007] The filter cartridge can filter dust in the exhaust gas, intercept impurities and dust in the exhaust gas, and prevent coal ash from adhering to the waste heat pipe. When a lot of impurities accumulate in the filter cartridge, the fixed cartridge can be pulled out, and the dust particles stuck in the filter cartridge can be removed and collected by a brush and a collection groove, and cleaned with water stored in the waste heat tube to ensure the filtering effect of the filter cartridge.

[0008] By arranging the temperature sensor on the cover plate, installation and disassembly of the temperature sensor can be facilitated, thereby facilitating the overall installation work.

[0009] By detecting the temperature value at the exhaust pipe through a temperature sensor, the opening and closing degree of the drain valve and the liquid level valve can be adjusted through the control end, thereby reducing the consumption of water resources while maintaining the waste heat absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0011] Figure 2 This utility model Figure 1 A schematic diagram of a top view structure;

[0012] Figure 3 This utility model Figure 1 A schematic diagram of the front view structure of

[0013] Figure 4 This utility model Figure 1 A side view structural schematic diagram of;

[0014] Figure 5 This utility model Figure 2 Schematic diagram of the upper section of the middle AA;

[0015] Figure 6 This utility model Figure 2 Schematic diagram of the lower section of the middle AA;

[0016] Figure 7 This utility model Figure 3 Schematic cross-section of the middle BB;

[0017] In the figure:

[0018] 10. Waste heat tube; 11. Exhaust pipe; 12. Water inlet pipe; 13. Water outlet pipe; 14. Drain valve; 15. Cover plate; 16. Hook; 17. Slot; 18. Temperature sensor; 19. Temperature measuring block; 20. Exhaust pipe; 21. Waste heat pipe; 22. Screw; 23. Fixed tube; 24. Filter cartridge; 25. Brush; 26. Collection tank; 27. Liquid level valve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element at the same time:

[0021] Embodiment 1:

[0022] Reference Figure 1-Figure 7 , a waste heat recovery device for thermal power generation according to an embodiment of the utility model;

[0023] The waste gas enters the filter cartridge 24 through the waste gas pipe 11, and the dust carried in the waste gas is removed under the filtration of the filter cartridge 24. The waste gas passes through the filter cartridge 24 to the fixed cartridge 23, and the waste gas flows upward through the evenly distributed exhaust pipe 20 connected to the upper end of the fixed cartridge 23 and enters the waste heat pipe 21. The waste gas flows downward along the spiral reverse direction of the waste heat pipe 21, and is discharged outward through the waste heat pipe 21. The waste heat pipe 21 passes through the end of the waste heat cartridge 10 and is connected to the purification tower for purification treatment to remove harmful gases in the waste gas.

[0024] The drain valve 14 and the liquid level valve 27 are opened by the electrical signal from the control end, and water flows into the waste heat tube 10 through the water inlet pipe 12 and the liquid level valve 27. At the beginning, the opening degree of the drain valve 14 is smaller than the opening degree of the liquid level valve 27, and the liquid level in the waste heat tube 10 gradually rises, and the water submerges the waste heat tube 21 at the lower end, the middle end and part of the upper end. When the liquid level rises until it overflows the liquid level valve 27, the liquid level valve 27 is closed for a period of time, and the drain valve 14 remains open. Then the liquid level valve 27 is opened, and the opening degree of the drain valve 14 and the liquid level valve 27 are consistent, so that the liquid level is kept within a certain range. The water passes through the opened drain valve 14 and the water outlet pipe 13 to be discharged from the waste heat tube 10, and the waste heat recovery work is performed by absorbing the waste gas heat transmitted from the waste heat tube 21 by the water;

[0025] The temperature sensor 18 is in contact with the exhaust pipe 20 through the temperature measuring block 19 connected at the lower end, and can obtain the temperature at the exhaust pipe 20. The temperature value detected by the temperature sensor 18 is transmitted to the control end connected and arranged. The control end controls the opening and closing degree of the drain valve 14 and the liquid level valve 27 according to the detected temperature value, thereby controlling the water flow rate. When the temperature value at the exhaust pipe 20 is higher, the opening and closing degree of the drain valve 14 and the liquid level valve 27 is larger, and vice versa.

[0026] When cleaning, the user removes the cover plate 15 from the bottom to the top, disassembles the connecting device between the exhaust pipe 20 and the fixed cylinder 23, disconnects the connection between the exhaust pipe 11 and the exhaust pipe, and rotates the screw 22. The screw 22 rotates and moves upward under the threaded cooperation of the fixed threaded sleeve, and the dust particles stuck in the filter cartridge 24 are cleared and collected by the brush 25 and the collection groove 26 connected to the lower end of the fixed cylinder 23. The fixed cylinder 23 moves upward to cancel the abutment protection with the outer periphery of the filter cartridge 24, so that water can pass through the filter cartridge 24 to clean the filtered dust and discharge the water outward through the exhaust pipe 11.

[0027] It is clear to those skilled in the art that various modifications to the above embodiments can be made without departing from the overall spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. A waste heat recovery device for thermal power generation, comprising a waste heat cylinder (10), a filter cylinder (24) being fixedly arranged in the waste heat cylinder (10), a waste gas pipe (11) being fixedly arranged at the lower end of the waste heat cylinder (10), the waste gas pipe (11) extending upward and inserted into the filter cylinder (24), characterized in that: A cover plate (15) is provided at the waste heat cylinder (10) and at the upper end of the filter cylinder (24); a screw rod (22) is provided on the cover plate (15); a fixed cylinder (23) is fixedly provided at the lower end of the screw rod (22); a brush (25) and a collecting groove (26) are provided at the lower end of the fixed cylinder (23); an inner peripheral portion of the brush (25) abuts against an outer peripheral portion of the filter cylinder (24); an evenly distributed exhaust pipe (20) is connected to the upper end of the fixed cylinder (23); a waste heat pipe (21) is connected to the exhaust pipe (20); the waste heat pipe (21) is spirally arranged downward on the outer periphery of the fixed cylinder (23); the lower end of the waste heat pipe (21) extends outwardly and penetrates the waste heat cylinder (10); an inlet pipe (12) and an outlet pipe (13) distributed up and down are connected and fixedly provided at the waste heat cylinder (10).

2. A thermal power generation waste heat recovery device according to claim 1, characterized in that: The cover plate (15) is provided with evenly distributed slots (17), the slots (17) are fixed with a temperature sensor (18), the lower end of the temperature sensor (18) is connected with a temperature measuring block (19), and the lower end surface of the temperature measuring block (19) is in close contact with the outer peripheral surface of the exhaust pipe (20).

3. A waste heat recovery device for thermal power generation according to claim 2, characterized in that: The upper end surface of the cover plate (15) is fixedly provided with hook claws (16) evenly distributed in the circumferential direction, and the hook claws (16) are hung on the upper end portion of the waste heat cylinder (10).

4. A waste heat recovery device for thermal power generation according to claim 3, characterized in that: The water inlet pipe (12) and the water outlet pipe (13) are respectively provided with a liquid level valve (27) and a drain valve (14); the drain valve (14), the temperature sensor (18) and the liquid level valve (27) are all electrically connected to the control end at the outer end.

5. A waste heat recovery device for thermal power generation according to claim 4, characterized in that: A threaded sleeve which is thread-matched and fixedly arranged is provided on the outer periphery of the screw rod (22).

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