Thermal power plant dead steam waste heat utilization device

Abstract

The utility model relates to the technical field of waste heat utilization, and discloses a thermal power plant dead steam waste heat utilization device which comprises a box body, a plurality of sets of heat exchange pipes are arranged on the inner wall of the box body at equal intervals, an air inlet cover is fixedly connected to one end of the box body, a motor is fixedly connected to the upper surface of the air inlet cover, and a cleaning brush is arranged in the air inlet cover. By means of the filter plate, during use, the filter plate can filter dead steam, impurities and dust in the dead steam are filtered out, the heat exchange efficiency of the device is further improved, the worm is driven to rotate through the cleaning brush and the motor through the rotating shaft, the worm is driven to rotate through the rotating shaft, and therefore the cleaning effect is improved. When the worm rotates, the gear is driven to rotate, when the gear rotates, the lead screw is driven to rotate, when the lead screw rotates, the cleaning brush is driven to move up and down through the limiting block, when the cleaning brush moves, dust attached to the surface of the filtering plate is scraped, and therefore the filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology, and more specifically to a waste heat utilization device for exhaust steam from a thermal power plant. Background Technology

[0002] Exhaust steam is superheated steam with thermal potential energy that is introduced into the steam turbine through pipelines, where it converts thermal potential energy into kinetic energy. During operation, thermal power plants discharge large amounts of water and steam, sometimes referred to as wastewater or exhaust steam. The exhaust steam itself has a great deal of heat. However, most existing equipment cannot utilize this energy, and most of the exhaust steam is directly discharged, resulting in energy waste.

[0003] An existing application (application number 202220854730.8) describes a waste heat recovery device for thermal power plant exhaust steam, relating to the field of thermal power equipment technology. It includes a mounting frame placed on the ground, with a gas collector installed on the surface of the frame. A long pipe is installed at the steam inlet end of the gas collector, one end of which is connected to a waste steam inlet pipe. A waste steam outlet pipe is connected to the steam outlet end of the gas collector, and a heat exchange box is connected to the end of the waste steam outlet pipe furthest from the gas collector. An exhaust pipe is movably hinged to the outer wall of the heat exchange box, and a branch pipe is connected to the inner top of the exhaust pipe. In use, the device described in this application can be placed near the boiler burner. Waste steam generated during the operation of the thermal power plant is introduced into the gas collector through the waste steam inlet pipe, and then the collected waste steam is quickly sent into the upper part of the inner cavity of the heat exchange box through the waste steam outlet pipe. Simultaneously, some of the waste steam heat is discharged into the burner through the exhaust pipe and the branch pipe, improving combustion efficiency and utilizing waste heat.

[0004] The aforementioned device lacks a dust removal and filtration mechanism during use. Over a long period of time, dust from the exhaust steam will adhere to the surface of the heat exchange structure, thereby increasing the heat transfer between the heat exchange structure and the exhaust steam. To address this issue, we propose a waste heat utilization device for thermal power plants. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a waste heat utilization device for exhaust steam in thermal power plants to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a waste heat utilization device for exhaust steam in a thermal power plant, including a box body, a number of heat exchange tubes are arranged at equal intervals on the inner wall of the box body, an air inlet hood is fixedly connected to one end of the box body, a motor is fixedly connected to the upper surface of the air inlet hood, a cleaning brush is provided inside the air inlet hood, an installation groove is provided on the upper surface of the air inlet hood, and locking blocks are provided at both ends of the installation groove.

[0007] Wherein: both ends of the heat exchange tube extend to the upper surface of the box and are fixedly connected to a fixing plate, and the upper surface of the fixing plate is provided with connectors arranged in a straight line at equal intervals, and the connectors are connected to the heat exchange tube;

[0008] Preferably, a base is fixedly connected to the bottom of the box, an exhaust pipe is fixedly connected to one end of the box, a controller is fixedly connected to the surface of the box, and partitions are arranged at equal intervals on the inner wall of the box, with the partitions and several sets of heat exchange tubes arranged alternately.

[0009] Preferably, a sealing cover is fixedly connected to the upper surface of the air intake hood, a discharge bin is fixedly connected to the lower surface of the air intake hood, an air intake pipe is fixedly connected to one end of the air intake hood, a fan is provided at one end of the inner wall of the air intake hood, fixed rods are arranged in a ring at equal intervals on the side of the fan, the fan is fixedly connected to the inside of the air intake hood through the fixed rods, a filter plate is fixedly connected to the inner wall of the air intake hood at the mounting groove, and a handle is fixedly connected to the upper surface of the filter plate.

[0010] Preferably, a baffle is movably connected to the inner wall of the discharge hopper, and a pull rod is fixedly connected to the side of the baffle located outside the discharge hopper.

[0011] Preferably, the output end of the motor is fixedly connected to a rotating shaft, and the other end of the rotating shaft is fixedly connected to a worm gear. One end of the rotating shaft passes through the worm gear and is fixedly connected to the inner wall of the sealing cover through a bearing.

[0012] Preferably, the side of the cleaning brush is in contact with the surface of the filter plate, both ends of the cleaning brush are fixedly connected to limit blocks, the inner walls of the limit blocks are threaded with lead screws, the top of the lead screws are fixedly connected to gears, the gears are meshed with worm gears, and the bottom of the lead screws are fixedly connected to the lower surface of the inner wall of the air intake shroud through a base.

[0013] Preferably, the lower surface of each locking block is in contact with the upper surface of the filter plate, one end of each locking block extends to the outside of the mounting groove and is fixedly connected to a limiting rod, a fixing frame is slidably connected to the side of the limiting rod, one end of the fixing frame is fixedly connected to the side of the air intake hood, and a spring is sleeved on the outer side of each limiting rod, with the two ends of the spring abutting against the locking block and the fixing frame respectively.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model incorporates a filter plate. When the device is used, the filter plate filters the exhaust steam, thereby removing impurities and dust, thus improving the heat exchange efficiency of the device. Furthermore, through the included cleaning brush, the motor drives the worm gear to rotate via the rotating shaft. When the worm gear rotates, it drives the gear to rotate, which in turn drives the lead screw to rotate. When the lead screw rotates, it moves the cleaning brush up and down via the limiting block. As the cleaning brush moves, it scrapes off the dust adhering to the surface of the filter plate, thereby improving its filtration effect.

[0016] 2. The present invention uses partitions that are arranged in an alternating pattern to block the exhaust steam, causing it to flow in an S-shape inside the box, thereby increasing the residence time of the exhaust steam inside the box and thus improving the heat exchange efficiency of the device.

[0017] 3. This utility model features a locking block. During prolonged use, when the filter plate needs to be replaced, pulling the limiting rod moves the locking block away from the upper surface of the filter plate. Then, pulling the handle moves the filter plate out of the mounting slot, allowing it to be removed. A new filter plate is then installed into the mounting slot. At this point, the spring pushes the locking block back to its original position, thus securing the filter plate and improving the stability of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the air intake shroud structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the material discharge bin structure of this utility model;

[0022] Figure 5 For the present utility model Figure 2 Schematic diagram of the structure at point A in the middle;

[0023] Figure 6 For the present utility model Figure 2 Schematic diagram of the structure at point B;

[0024] Figure 7 This is a schematic diagram of the locking block structure of this utility model.

[0025] The attached diagram is labeled as follows: 1. Housing; 101. Base; 102. Exhaust pipe; 103. Controller; 104. Partition; 2. Heat exchange pipe; 201. Fixing plate; 202. Connector; 3. Air inlet hood; 301. Sealing cover; 302. Discharge hopper; 3021. Baffle; 3022. Pull rod; 303. Air inlet pipe; 304. Fan; 3041. Fixing rod; 305. Filter plate; 3051. Handle; 306. Mounting slot; 4. Motor; 401. Rotating shaft; 402. Worm gear; 5. Cleaning brush; 501. Limiting block; 502. Lead screw; 5021. Gear; 6. Locking block; 601. Limiting rod; 602. Fixing frame; 603. Spring. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The waste heat utilization device of thermal power plant exhaust steam involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] This utility model provides a waste heat utilization device for exhaust steam in thermal power plants, including a box body 1. Several sets of heat exchange tubes 2 are arranged at equal intervals on the inner wall of the box body 1. An air inlet hood 3 is fixedly connected to one end of the box body 1. A motor 4 is fixedly connected to the upper surface of the air inlet hood 3. A cleaning brush 5 is provided inside the air inlet hood 3. An installation groove 306 is opened on the upper surface of the air inlet hood 3. Locking blocks 6 are provided at both ends of the installation groove 306.

[0028] Both ends of the heat exchange tube 2 extend to the upper surface of the box 1 and are fixedly connected to a fixing plate 201. The upper surface of the fixing plate 201 is provided with connectors 202 arranged in a straight line at equal intervals. The connectors 202 are connected to the heat exchange tube 2. In use, the device can be connected to an external hot water tank through the connectors 202.

[0029] Furthermore, a base 101 is fixedly connected to the bottom of the housing 1, an exhaust pipe 102 is fixedly connected to one end of the housing 1, a controller 103 is fixedly connected to the surface of the housing 1, and partitions 104 are arranged at equal intervals on the inner wall of the housing 1. The partitions 104 and several sets of heat exchange tubes 2 are arranged alternately. In use, the partitions 104, which are arranged in an alternating manner, can block the exhaust steam and make it flow in an S-shape inside the housing 1, thereby increasing the residence time of the exhaust steam inside the housing 1 and improving the heat exchange efficiency of the device.

[0030] Furthermore, a sealing cover 301 is fixedly connected to the upper surface of the air intake hood 3, and a discharge bin 302 is fixedly connected to the lower surface of the air intake hood 3. An air intake pipe 303 is fixedly connected to one end of the air intake hood 3, and a fan 304 is provided at one end of the inner wall of the air intake hood 3. Fixed rods 3041 are arranged in a ring at equal intervals on the side of the fan 304. The fan 304 is fixedly connected to the inside of the air intake hood 3 through the fixed rods 3041. A filter plate 305 is fixedly connected to the inner wall of the air intake hood 3 at the mounting groove 306. A handle 3051 is fixedly connected to the upper surface of the filter plate 305. In use, the exhaust steam is filtered through the filter plate 305, thereby discharging impurities and dust, and thus improving the heat exchange efficiency of the device.

[0031] Furthermore, a baffle 3021 is movably connected to the inner wall of the discharge bin 302. A pull rod 3022 is fixedly connected to the side of the baffle 3021 located outside the discharge bin 302. In use, the dust filtered down is easily discharged through the discharge bin 302.

[0032] Furthermore, a rotating shaft 401 is fixedly connected to the output end of the motor 4, and a worm gear 402 is fixedly connected to the other end of the rotating shaft 401. One end of the rotating shaft 401 passes through the worm gear 402 and is fixedly connected to the inner wall of the sealing cover 301 via a bearing. The side of the cleaning brush 5 is in contact with the surface of the filter plate 305. Limiting blocks 501 are fixedly connected to both ends of the cleaning brush 5, and threaded screws 502 are threaded onto the inner walls of the limiting blocks 501. Gears 5021 are fixedly connected to the top of the threaded screws 502. The gears 5021 are all connected to... The worm gear 402 is engaged, and the bottom end of the lead screw 502 is fixedly connected to the lower surface of the inner wall of the air intake shroud 3 through the base. In use, the motor 4 drives the worm gear 402 to rotate through the rotating shaft 401. When the worm gear 402 rotates, it drives the gear 5021 to rotate. When the gear 5021 rotates, it drives the lead screw 502 to rotate. When the lead screw 502 rotates, it drives the cleaning brush 5 to move up and down through the limit block 501. When the cleaning brush 5 moves, it scrapes off the dust attached to the surface of the filter plate 305, thereby improving its filtration effect.

[0033] Furthermore, the lower surface of the locking block 6 is in contact with the upper surface of the filter plate 305. One end of the locking block 6 extends to the outside of the mounting groove 306 and is fixedly connected to a limiting rod 601. A fixing bracket 602 is slidably connected to the side of the limiting rod 601. One end of the fixing bracket 602 is fixedly connected to the side of the air intake hood 3. A spring 603 is sleeved on the outside of the limiting rod 601. The two ends of the spring 603 abut against the locking block 6 and the fixing bracket 602 respectively. When the filter plate 305 needs to be replaced, pull the limiting rod 601 to move the locking block 6 away from the upper surface of the filter plate 305. Then pull the handle 3051 to move the filter plate 305 out of the inside of the mounting groove 306, thereby removing the filter plate 305. Then, the new filter plate 305 is reinstalled into the inside of the mounting groove 306. At this time, the spring 603 will push the locking block 6 to reset through its own elastic force, thereby fixing the filter plate 305 and improving the stability of the device.

[0034] The working principle of this utility model is as follows: In use, firstly, the exhaust steam pipe of the external equipment is fixedly connected to the air inlet pipe 303, then the external heat exchange tank and connector 202 are fixedly connected, and then the fan 304 is turned on. During the operation of the fan 304, the exhaust steam will be driven through the air inlet hood 3 into the interior of the box 1, so that the exhaust steam comes into contact with the heat exchange tube 2. Through the heat conduction of the heat exchange tube 2, the hot air in the exhaust steam and the water inside the heat exchange tube 2 are quickly converted, thereby realizing the utilization of the waste heat of the exhaust steam. Through the partitions 104 provided, which are arranged in an alternating manner, the exhaust steam can be blocked, so that it flows in an S-shape inside the box 1, increasing the residence time of the exhaust steam inside the box 1, thereby improving the heat exchange efficiency of the device.

[0035] The filter plate 305 filters the exhaust steam, removing impurities and dust, thereby improving the heat exchange efficiency of the device. The cleaning brush 5, along with the motor 4 driving the worm gear 402 via the rotating shaft 401, drives the gear 5021, which in turn drives the lead screw 502. The lead screw 502, through the limit block 501, moves the cleaning brush 5 up and down, scraping away dust adhering to the surface of the filter plate 305, thus improving the filtration effect. The scraped impurities are discharged through the discharge bin 302, providing convenience and speed.

[0036] During prolonged use, when the filter plate 305 needs to be replaced, pull the limit rod 601 to move the locking block 6 away from the upper surface of the filter plate 305. Then pull the handle 3051 to move the filter plate 305 out of the mounting slot 306, thus removing the filter plate 305. Then, reinstall the new filter plate 305 into the mounting slot 306. At this time, the spring 603 will push the locking block 6 to reset through its own elasticity, thereby fixing the filter plate 305 and improving the stability of the device.

[0037] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0038] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0039] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for exhaust steam from a thermal power plant, comprising a housing (1), characterized in that: The inner wall of the box (1) is equidistantly arranged with several sets of heat exchange tubes (2). One end of the box (1) is fixedly connected to an air inlet hood (3). The upper surface of the air inlet hood (3) is fixedly connected to a motor (4). The inside of the air inlet hood (3) is provided with a cleaning brush (5). The upper surface of the air inlet hood (3) is provided with an installation groove (306). Both ends of the installation groove (306) are provided with locking blocks (6). Wherein: both ends of the heat exchange tube (2) extend to the upper surface of the box (1) and are fixedly connected to a fixing plate (201). The upper surface of the fixing plate (201) is arranged with connectors (202) in a straight line at equal intervals. The connectors (202) are connected to the heat exchange tube (2).

2. The waste heat recovery device for thermal power plant exhaust steam according to claim 1, characterized in that: The bottom of the box (1) is fixedly connected to a base (101), one end of the box (1) is fixedly connected to an exhaust pipe (102), the surface of the box (1) is fixedly connected to a controller (103), the inner wall of the box (1) is equidistantly arranged with partitions (104), and the partitions (104) are arranged alternately with several sets of heat exchange tubes (2).

3. The waste heat recovery device for thermal power plant exhaust steam according to claim 1, characterized in that: A sealing cover (301) is fixedly connected to the upper surface of the air intake hood (3), a discharge bin (302) is fixedly connected to the lower surface of the air intake hood (3), an air intake pipe (303) is fixedly connected to one end of the air intake hood (3), a fan (304) is provided at one end of the inner wall of the air intake hood (3), and fixed rods (3041) are arranged in a ring at equal intervals on the side of the fan (304). The fan (304) is fixedly connected to the inside of the air intake hood (3) through the fixed rods (3041). A filter plate (305) is fixedly connected to the inner wall of the air intake hood (3) at the mounting groove (306), and a handle (3051) is fixedly connected to the upper surface of the filter plate (305).

4. The waste heat recovery device for thermal power plant exhaust steam according to claim 3, characterized in that: The inner wall of the discharge bin (302) is movably connected to a baffle (3021), and a pull rod (3022) is fixedly connected to the side of the baffle (3021) located outside the discharge bin (302).

5. A waste heat recovery device for thermal power plant exhaust steam according to claim 1, characterized in that: The output end of the motor (4) is fixedly connected to a rotating shaft (401), and the other end of the rotating shaft (401) is fixedly connected to a worm gear (402). One end of the rotating shaft (401) passes through the worm gear (402) and is fixedly connected to the inner wall of the sealing cover (301) through a bearing.

6. The waste heat recovery device for thermal power plant exhaust steam according to claim 1, characterized in that: The side of the cleaning brush (5) is in contact with the surface of the filter plate (305). Both ends of the cleaning brush (5) are fixedly connected to limit blocks (501). The inner wall of the limit blocks (501) is threaded with a lead screw (502). The top end of the lead screw (502) is fixedly connected to a gear (5021). The gear (5021) is meshed with a worm gear (402). The bottom end of the lead screw (502) is fixedly connected to the lower surface of the inner wall of the air intake hood (3) through a base.

7. A waste heat recovery device for thermal power plant exhaust steam according to claim 1, characterized in that: The lower surface of the locking block (6) is in contact with the upper surface of the filter plate (305). One end of the locking block (6) extends to the outside of the mounting groove (306) and is fixedly connected to a limiting rod (601). A fixing frame (602) is slidably connected to the side of the limiting rod (601). One end of the fixing frame (602) is fixedly connected to the side of the air intake hood (3). A spring (603) is sleeved on the outside of the limiting rod (601). The two ends of the spring (603) abut against the locking block (6) and the fixing frame (602) respectively.

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