A high-temperature fly ash waste heat recovery device for coal-fired power plants

Abstract

The utility model belongs to the waste heat recovery technical field, concretely is a kind of coal-fired power plant high-temperature fly ash waste heat recovery device, including box, its characterized in that: the side fixed setting of box has air inlet bin, the box on the bottom of air inlet bin is fixedly installed with mounting plate, the opening of air inlet bin is fixedly installed with filter plate, by being provided with filter plate and wiping cotton, flue gas will pass through filter plate and enter air inlet bin, filter plate has the blocking effect to the particle dust in flue gas, start servo motor and carry out forward and reverse rotation, again by the rotation of gear makes that rack moves up and down, to control wiping cotton and wipe filter plate, the particle dust that filter plate blocks down is scraped, make device can continuously block particle dust, so that the particle in flue gas is not easy to enter the inside of box, solve the structure that the air inlet of existing device is not set filtering, when flue gas enters device inside, these dusts can be attached on the inner wall of heat exchange flue, the problem of influence heat exchange efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, specifically a waste heat recovery device for high-temperature fly ash from coal-fired power plants. Background Technology

[0002] Coal-fired boilers in thermal power plants generate steam by burning coal to drive generators and produce electricity. Under normal operating conditions, the coal should be completely burned, leaving no unburned lumps.

[0003] For example, CN117869919A discloses a waste heat recovery device for a coal-fired boiler in a thermal power plant, which includes a recovery component, including an air inlet, a recovery furnace connected to the air inlet, an exhaust port connected to the recovery furnace, a flue inside the recovery furnace, and a recovery port located at the top of the recovery furnace; and a diversion component, including a drive disc movably located at the bottom of the recovery furnace and a diversion plate fixedly located at the end face of the drive disc. By rotating the diversion component, the crushing component can be activated to crush the unburned coal in the boiler and fully release the heat carried inside. Similarly, the diversion component can divert excess heat to the recovery port of the recovery component, thereby achieving the purpose of fully recovering and diverting the waste heat in the boiler.

[0004] While the aforementioned existing technology achieves the purpose of fully recovering and diverting waste heat from the boiler through the diversion component, the air inlet of the device is not equipped with a filter structure. The high-temperature flue gas discharged from the boiler cannot be filtered and directly enters the heat exchange device for heat exchange. Since the flue gas contains some particulate dust, this dust will adhere to the inner wall of the heat exchange flue when the flue gas enters the device, affecting the heat exchange efficiency. Therefore, in order to address the above problems, a high-temperature fly ash waste heat recovery device for coal-fired power plants is proposed. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model proposes a high-temperature fly ash waste heat recovery device for coal-fired power plants.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-temperature fly ash waste heat recovery device for coal-fired power plants, comprising a housing; characterized in that: an air inlet chamber is fixedly provided on one side of the housing, an mounting plate is fixedly installed on the bottom of the housing of the air inlet chamber, a filter plate is fixedly installed at the opening of the air inlet chamber, two gears are provided on the top of the mounting plate, racks are meshed on the gears in the direction of their proximity, a connecting plate is fixedly connected between the two racks, a servo motor is fixedly installed on the mounting plate on one side of the gears, the gears are fixedly installed on the output end of the servo motors, a wiping cotton is provided on the side of the connecting plate near the air inlet chamber, and the side of the wiping cotton away from the connecting plate is in contact with the filter plate.

[0007] Preferably, the air intake chamber inside the box has a through hole, and a disc-shaped smoke pipe is provided inside the box. The disc-shaped smoke pipe is made of thermally conductive metal. The opening at one end of the disc-shaped smoke pipe is aligned with the through hole and fixed to the air intake chamber, and the other end of the disc-shaped smoke pipe extends outward from the box.

[0008] Preferably, both ends of the wiping cotton are provided with fixing mechanisms, and the wiping cotton is fixed to the connecting plate by the fixing mechanisms. The fixing mechanisms include connecting blocks, which are respectively fixedly installed on both ends of the wiping cotton.

[0009] Preferably, guide rods are fixedly connected to the mounting plates between the racks, and all guide rods pass through the mounting plates. A water inlet pipe is connected to the top of the box, and a water outlet pipe is connected to the bottom of the box.

[0010] Preferably, a fastening bolt is threaded onto the connecting block, the thread of the fastening bolt penetrates the top of the rack, and a fastening nut is threaded onto the fastening bolt.

[0011] Preferably, a first valve is provided at the top of the water inlet pipe, and a second valve is provided on one side of the water outlet pipe.

[0012] Preferably, support legs are fixedly installed on both sides of the bottom end of the box, and support frames are fixedly installed on the bottom ends of the support legs.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model provides a high-temperature fly ash waste heat recovery device for coal-fired power plants. By incorporating a filter plate and wiping cotton, flue gas enters the inlet chamber through the filter plate. The filter plate effectively blocks particulate dust in the flue gas. A servo motor is activated to rotate forward and backward, and the rotation of gears causes the rack to move up and down, thereby controlling the wiping cotton to wipe the filter plate, scraping away the particulate dust blocked on the filter plate. This allows the device to continuously block particulate dust, making it difficult for particles in the flue gas to enter the chamber. This solves the problem in existing devices where the inlet lacks a filter structure, causing dust to adhere to the inner wall of the heat exchange duct when the flue gas enters the device, affecting heat exchange efficiency.

[0015] 2. This utility model provides a high-temperature fly ash waste heat recovery device for coal-fired power plants. Water is introduced into the housing through a water inlet pipe via a through-hole and a disc-shaped flue pipe. After the flue gas generated by the coal-fired power plant enters the air inlet chamber, it then enters the coiled disc-shaped flue pipe through the through-hole, thereby raising the water temperature in the housing and achieving heat exchange. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a frontal perspective view of the structure of this utility model;

[0018] Figure 2 This is a perspective view of the structure from the side in this utility model;

[0019] Figure 3 This is a perspective view of the front cross-section of the box structure in this utility model;

[0020] Figure 4 This is a perspective view of the rack in this utility model;

[0021] Figure 5 This is a magnified perspective view of the structure at point A in this utility model.

[0022] Legend:

[0023] 110. Housing; 111. Air intake chamber; 112. Mounting plate; 113. Filter plate; 114. Gear; 115. Rack; 116. Servo motor; 117. Connecting plate; 118. Wiping cotton; 119. Guide rod; 120. Water inlet pipe; 121. Water outlet pipe; 122. First valve; 123. Second valve; 124. Support leg; 125. Support frame; 126. Through hole; 127. Disc-shaped flue; 200. Fixing mechanism; 210. Connecting block; 211. Fastening bolt; 212. Fastening nut. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Specific implementation examples are given below.

[0026] Please see Figure 1-4This utility model provides a high-temperature fly ash waste heat recovery device for coal-fired power plants, including a housing 110; an air inlet chamber 111 is fixedly installed on one side of the housing 110, and an mounting plate 112 is fixedly installed on the bottom of the housing 110 of the air inlet chamber 111. A filter plate 113 is fixedly installed at the opening of the air inlet chamber 111. Two gears 114 are provided on the top of the mounting plate 112, and racks 115 are meshed on the gears 114 in the direction of their proximity. A connecting plate 117 is fixedly connected between the two racks 115. A servo motor 116 is fixedly installed on the mounting plate 112 on one side of the gears 114, and the gears 114 are fixedly installed on the output end of the servo motors 116. A wiping cotton 118 is provided on the side of the connecting plate 117 near the air inlet chamber 111. The wiping cotton 118 is attached to the filter plate 113 on the side away from the receiving plate 117. During operation, the flue gas enters the air inlet chamber 111 through the filter plate 113. The filter plate 113 has the function of blocking particulate dust in the flue gas. The servo motor 116 is started to rotate forward and backward, and the rack 115 moves up and down through the rotation of the gear 114, thereby controlling the wiping cotton 118 to wipe the filter plate 113 and scrape off the particulate dust blocked on the filter plate 113. This allows the device to continuously block particulate dust, so that the particles in the flue gas are not easy to enter the inside of the housing 110. This solves the problem that the existing device does not have a filter structure at the air inlet, and when the flue gas enters the device, these dusts will adhere to the inner wall of the heat exchange flue, affecting the heat exchange efficiency.

[0027] Furthermore, such as Figure 3 As shown, the air inlet chamber 111 inside the housing 110 has a through hole 126. A disc-shaped flue 127 is installed inside the housing 110. The disc-shaped flue 127 is made of thermally conductive metal. The opening at one end of the disc-shaped flue 127 is aligned with the through hole 126 and fixed to the air inlet chamber 111. The other end of the disc-shaped flue 127 extends outward from the housing 110. During operation, water enters the housing 110 through the water inlet pipe 120. After the flue gas generated by the coal-fired power plant enters the air inlet chamber 111, it enters the coiled disc-shaped flue 127 through the through hole 126, which raises the water temperature in the housing 110 and achieves heat exchange.

[0028] Furthermore, both ends of the wiping cotton 118 are provided with fixing mechanisms 200. The wiping cotton 118 is fixed to the receiving plate 117 by the fixing mechanisms 200. The fixing mechanism 200 includes connecting blocks 210, which are respectively fixedly installed on both ends of the wiping cotton 118. During operation, the device uses the fixing mechanisms 200 to fix the wiping cotton 118 to the receiving plate 117. After long-term use, the worn wiping cotton 118 can be disassembled and replaced.

[0029] Furthermore, guide rods 119 are fixedly connected to the mounting plate 112 between the racks 115. The guide rods 119 all pass through the connecting plate 117. A water inlet pipe 120 is connected to the top of the housing 110, and a water outlet pipe 121 is connected to the bottom of the housing 110. Water enters the housing 110 through the water inlet pipe 120. After the flue gas generated by the coal-fired power plant enters the air intake chamber 111, it enters the coiled disc-shaped flue pipe 127 through the through hole 126.

[0030] Furthermore, a fastening bolt 211 is threaded on the connecting block 210. The thread of the fastening bolt 211 passes through the top of the rack 115. A fastening nut 212 is threaded on the fastening bolt 211. By using the fastening bolt 211 and the fastening nut 212 in cooperation, the wiping cotton 118 can be fixed more firmly.

[0031] Furthermore, a first valve 122 is provided at the top of the inlet pipe 120, and a second valve 123 is provided on one side of the outlet pipe 121. The first valve 122 is used to control the water inlet pipe 120, and the second valve 123 is used to control the water outlet pipe 121.

[0032] Furthermore, support legs 124 are fixedly installed on both sides of the bottom of the box 110, and support frames 125 are fixedly installed at the bottom of the support legs 124. The support legs 124 have the function of increasing the height of the box 110, and the support frames 125 are used to support the box 110.

[0033] Working principle: When using this device, the flue gas generated by the coal-fired power plant enters the housing 110 through the inlet chamber 111. Since the device is equipped with a filter plate 113, the flue gas will enter the inlet chamber 111 through the filter plate 113. The filter plate 113 has the function of blocking particulate dust in the flue gas. The servo motor 116 is started to rotate forward and reverse, and the rack 115 moves up and down through the rotation of the gear 114, thereby controlling the wiping cotton 118 to wipe the filter plate 113, scraping off the particulate dust blocked on the filter plate 113, so that the device can continuously block particulate dust, so that the particles in the flue gas are not easy to enter the housing 110. This solves the problem that the existing device does not have a filter structure at the air inlet, and when the flue gas enters the device, these dusts will adhere to the inner wall of the heat exchange flue, affecting the heat exchange efficiency. Water enters the housing 110 through the inlet pipe 120. Flue gas from the coal-fired power plant enters the intake chamber 111 and then passes through the through-hole 126 into the coiled disc-shaped flue pipe 127, raising the water temperature in the housing 110 and achieving heat exchange. The first valve 122 controls the water intake through the inlet pipe 120, and the second valve 123 controls the water output through the outlet pipe 121. The first and second valves are existing technology, so their working principles will not be described here. When the gear 114 rotates, causing the rack 115 to move up and down, the receiving plate 117 moves up and down in the direction of the guide rod 119. The device uses a fixing mechanism 200 to fix the wiping cotton 118 to the receiving plate 117. After long-term use, the worn wiping cotton 118 can be disassembled and replaced.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-temperature fly ash waste heat recovery device for coal-fired power plants, comprising a housing (110); characterized in that: An air intake chamber (111) is fixedly installed on one side of the housing (110). An mounting plate (112) is fixedly installed on the bottom of the housing (110) of the air intake chamber (111). A filter plate (113) is fixedly installed at the opening of the air intake chamber (111). Two gears (114) are provided on the top of the mounting plate (112). Racks (115) are meshed on both gears (114) in the direction they approach each other. A connecting plate (117) is fixedly connected between the gears (114) and the mounting plate (112) on one side of the gear (114). A servo motor (116) is fixedly installed on the mounting plate (112) on one side of the gear (114). The gears (114) are fixedly installed on the output end of the servo motor (116). A wiping cotton (118) is provided on the side of the connecting plate (117) near the air inlet chamber (111). The side of the wiping cotton (118) away from the connecting plate (117) is in contact with the filter plate (113).

2. The high-temperature fly ash waste heat recovery device for coal-fired power plants according to claim 1, characterized in that: The air intake chamber (111) inside the housing (110) has a through hole (126). A disc-shaped smoke pipe (127) is installed inside the housing (110). The disc-shaped smoke pipe (127) is made of thermally conductive metal. The opening at one end of the disc-shaped smoke pipe (127) is aligned with the through hole (126) and fixed to the air intake chamber (111). The other end of the disc-shaped smoke pipe (127) extends outward from the housing (110).

3. The high-temperature fly ash waste heat recovery device for coal-fired power plants according to claim 1, characterized in that: Both ends of the wiping cotton (118) are provided with fixing mechanisms (200). The wiping cotton (118) is fixed on the receiving plate (117) by the fixing mechanisms (200). The fixing mechanism (200) includes connecting blocks (210), which are respectively fixedly installed on both ends of the wiping cotton (118).

4. The high-temperature fly ash waste heat recovery device for coal-fired power plants according to claim 1, characterized in that: Guide rods (119) are fixedly connected to the mounting plate (112) between the racks (115). The guide rods (119) all pass through the connecting plate (117). A water inlet pipe (120) is connected to the top of the box (110), and a water outlet pipe (121) is connected to the bottom of the box (110).

5. A high-temperature fly ash waste heat recovery device for coal-fired power plants according to claim 3, characterized in that: The connecting block (210) is threaded with a fastening bolt (211), the fastening bolt (211) threaded through the top of the rack (115), and the fastening bolt (211) is threaded with a fastening nut (212).

6. The high-temperature fly ash waste heat recovery device for coal-fired power plants according to claim 4, characterized in that: A first valve (122) is provided at the top of the water inlet pipe (120), and a second valve (123) is provided on one side of the water outlet pipe (121).

7. A high-temperature fly ash waste heat recovery device for coal-fired power plants according to claim 6, characterized in that: Support legs (124) are fixedly installed on both sides of the bottom of the box (110), and support frames (125) are fixedly installed at the bottom of the support legs (124).

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