Heat exchange furnace for heat exchange of waste heat steam of power plant

Abstract

The embodiment of the invention provides a heat exchange furnace for waste heat steam heat exchange of a power plant, and relates to the field of waste heat recovery equipment. The heat exchange furnace for waste heat steam heat exchange of the power plant comprises a water storage mechanism, a heat exchange mechanism and a filtering mechanism, the heat exchange mechanism is located in the center of the interior of the water storage mechanism, the filtering mechanism is located at the lower end of the water storage mechanism, and the filtering mechanism is located at the lower end of the heat exchange mechanism. The heat exchange mechanism is arranged in the water storage mechanism, steam discharged by the heat exchange mechanism flows into the filtering mechanism, the filtering mechanism filters the inflowing steam, the cleaning mechanism is located at the lower end of the water storage mechanism and located at the rear end of the filtering mechanism, and steam generated by heating in the water storage mechanism flows into the cleaning mechanism. Filtering of waste heat steam, cleaning of the filter screen and humidifying of the filter screen can be completed synchronously, a driving mechanism does not need to be added, and the overall structure of the device is optimized.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery equipment, and more specifically, to a heat exchange furnace for waste heat steam heat exchange in power plants. Background Technology

[0002] With the continuous growth of global energy demand and the increasing scarcity of energy resources, improving energy efficiency has become an urgent priority. Power plants, as an important link in energy production, generate a large amount of waste heat steam during power generation. If this waste heat steam is not effectively utilized, it will result in huge energy waste. For example, Yimin Coal Mine currently has about 350 employees. Originally, domestic hot water was supplied by its own heating boiler in winter, which was energy-intensive and economically inefficient. In the winter of 2022, the heating in the plant area was changed to centralized heating. After the heating was stopped in 2023, a new hot water equipment was added to use the heating heat source to heat domestic water, reducing energy consumption and improving economic efficiency. For coal-fired power plants, coal combustion produces a large amount of fly ash. These fly ash particles may enter the waste heat steam system with the flue gas. The main components of fly ash include minerals such as silicon dioxide, aluminum oxide, and iron oxide. The particle size varies, ranging from a few micrometers to tens of micrometers. For example, during the boiler combustion process, some fly ash that is not completely captured by the dust collector may enter the steam system through boiler air leakage.

[0003] Existing waste heat recovery equipment in power plants typically uses waste heat steam to heat water, but after heat exchange, the waste heat steam is often directly discharged into the working environment, which can easily affect the air quality of the working environment and pose a health hazard to the workers.

[0004] Alternatively, the waste heat steam can be filtered to remove dust and impurities. However, during long-term use of the filter screen, it often requires manual shutdown and cleaning by staff, which affects the heat exchange efficiency and causes inconvenience to the staff. In addition, when the filter screen is too dry, dust and impurities are prone to flying and rebounding during the cleaning process, further complicating the cleaning work. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a heat exchange furnace for waste heat steam in power plants. This furnace utilizes waste heat steam to drive turbine blades, filtering the waste heat steam, cleaning the filter screen, and recycling water vapor generated by a water storage furnace to humidify the filter screen. Intermittent humidification makes it easier to capture dust, reducing the particulate matter and dust content in the waste heat steam. It can simultaneously complete filtration, cleaning, and humidification, utilizing its own energy to achieve cleaning and filtration functions without the need for additional drive components, thus optimizing the device structure.

[0006] A heat exchange furnace for power plant waste heat steam heat exchange according to an embodiment of this application includes: Water storage facilities; A heat exchange mechanism, located at the center inside the water storage mechanism; The filtration mechanism is located at the lower end of the water storage mechanism and the lower end of the heat exchange mechanism. The steam discharged from the heat exchange mechanism flows into the interior of the filtration mechanism, and the filtration mechanism filters the incoming steam. The cleaning mechanism is located at the lower end of the water storage mechanism and at the rear end of the filtration mechanism. Steam generated by heating inside the water storage mechanism flows into the interior of the cleaning mechanism. The filtration mechanism drives the cleaning mechanism to intermittently discharge steam into the interior of the filtration mechanism, thereby improving the quality of the waste gas filtered by the cleaning mechanism.

[0007] According to some embodiments of this application, the water storage mechanism includes a base plate and a water storage furnace. The water storage furnace is located at the upper end of the base plate. An air inlet pipe is fixedly connected to the middle of the upper end of the water storage furnace. A drain valve pipe is connected through the front end of the lower part of the water storage furnace. An inlet valve pipe is connected through the front end of the upper part of the water storage furnace.

[0008] According to some embodiments of this application, a plurality of supporting legs are fixedly connected to the edge of the lower surface of the water storage furnace, and the lower surface of the supporting legs is fixedly connected to the upper surface of the base plate.

[0009] According to some embodiments of this application, the heat exchange mechanism includes a large gas collection hood, a connecting rod, and heat exchange tubes. The large gas collection hood is fixedly connected to the upper end of the inner wall of the water storage furnace. A small gas collection hood is provided at the upper end of the large gas collection hood. Multiple transition short pipes are connected through the side walls of the small gas collection hoods. The lower ends of the transition short pipes are all connected through the large gas collection hood. The connecting rod is fixedly connected to the middle of the lower surface of the large gas collection hood. A connecting frame is fixedly connected to the lower surface of the connecting rod. The lower end of the connecting frame... A transfer hood is fixedly connected to the middle section. A transfer pipe is fixedly connected to the lower edge of the connecting frame. The upper ends of multiple heat exchange tubes are all connected to the lower end of the large gas collection hood. The lower ends of the heat exchange tubes all pass through the connecting frame and are connected to the transfer pipe. Multiple short ventilation pipes are connected to the outer wall of the transfer hood. The ends of the short ventilation pipes away from the transfer hood are all connected to the transfer pipe. An exhaust pipe is connected to the middle of the lower end of the transfer hood. The exhaust pipe is located at the upper end of the base plate.

[0010] According to some embodiments of this application, the lower end of the exhaust pipe penetrates the water storage furnace and extends to the outside of the water storage furnace.

[0011] According to some embodiments of this application, the filtration mechanism includes a gas collecting box, a gas treatment box, and turbine blades. The gas collecting box is fixedly connected to the middle of the upper surface of the base plate, and the gas treatment box is fixedly connected to the front end of the upper surface of the base plate. The gas collecting box is located at the rear end of the gas treatment box. Both the gas collecting box and the gas treatment box are located at the lower end of the water storage furnace and the large gas collecting hood. An exhaust gas inlet pipe is connected through the middle of the upper end of the gas collecting box. The upper end of the exhaust gas inlet pipe is fixedly connected to the lower end of the exhaust pipe. A first hollow rotating rod is rotatably connected to the middle of the gas collecting box. Turbine blades are fixedly connected to the outer wall of the first hollow rotating rod. An exhaust gas outlet pipe is connected through one side of the upper end of the gas collecting box. A vent pipe is fixedly connected to the upper end of the exhaust gas outlet pipe. The front end of the vent pipe extends into the interior of the gas treatment box. A second hollow rotating rod is fixedly connected to the front end of the first hollow rotating rod, and the first hollow rotating rod and the second hollow rotating rod are internally interconnected. A cleaning brush plate is fixedly connected to the front end of the second hollow rotating rod, and a diversion cover is fixedly connected to the front end of the second hollow rotating rod. A steam spray hole is provided on the diversion cover. A filter frame is fixedly connected to the inner wall of the gas treatment box near the front end, and a filter screen is fixedly connected to the inner wall of the filter frame.

[0012] According to some embodiments of this application, the turbine blades are located inside the gas collecting box.

[0013] According to some embodiments of this application, a sewage collection box is connected through to the lower part of the front end of the gas treatment box, and a control valve is connected through to one side of the lower end of the sewage collection box.

[0014] According to some embodiments of this application, the cleaning mechanism includes an annular pipe, a spiral adapter pipe, and a pressurizing cylinder. The annular pipe is fixedly connected to the lower end of the large gas collection hood, and multiple steam inlets are fixedly connected to the lower end of the annular pipe. An assembly cavity is opened on the side wall of the water storage furnace. The spiral adapter pipe is fixedly connected to the inside of the assembly cavity. The annular pipe and the spiral adapter pipe are connected through a flexible hose. The lower end of the spiral adapter pipe extends to the outside of the water storage furnace. The pressurizing cylinder is fixedly connected to one side of the rear end of the upper surface of the base plate. A first transmission wheel is fixedly connected to the outer wall of the first hollow rotating rod near the rear end. A first transmission rod is rotatably connected to one side of the rear end of the upper surface of the base plate. A second transmission wheel is fixedly connected to the outer wall of the front end of the first transmission rod. A transmission toothed belt is sleeved on the outer wall of the first transmission wheel and the second transmission wheel. A worm gear cylinder is fixedly connected to the outer wall of the rear end of the first transmission rod. A second transmission rod is rotatably connected to one side of the rear end of the base plate. A reciprocating threaded cylinder is fixedly connected to the outer wall of the upper end of the second transmission rod. A bidirectional slider is sleeved on the upper end of the reciprocating threaded cylinder. A driven worm gear is fixedly connected to the outer wall of the second transmission rod near the middle. The worm gear cylinder and the driven worm gear mesh with each other. A lower pressure frame is fixedly connected to the other side of the bidirectional slider. A sealing plate is fixedly connected to the lower end of the lower pressure frame. The sealing plate is slidably connected inside the pressure cylinder. Three short support legs are fixedly connected to the lower end of the outer wall of the pressure cylinder. The lower surface of the supporting short leg is fixedly connected to the upper surface of the base plate. A bellows is connected through the middle of the upper part of the sealing plate. The upper end of the bellows is fixedly connected to the lower end of the spiral adapter pipe. A transmission pipe is connected through the other side of the lower end of the pressure cylinder. A first one-way valve is fixedly connected to the end of the transmission pipe near the pressure cylinder. A positioning sleeve is fixedly connected to the outer wall of the rear end of the first hollow rotating rod. A bearing is fixedly connected to the outer wall of the transmission pipe near the end of the first hollow rotating rod. The outer wall of the bearing is fixedly connected to the inner wall of the positioning sleeve. A second one-way valve is fixedly connected to the outer wall of the lower end of the bellows.

[0015] According to some embodiments of this application, three guide rods are fixedly connected to the inner bottom surface of the pressure cylinder, and the sealing plate is slidably connected to the outer wall of the guide rods.

[0016] The beneficial effects of this application are as follows: During use, waste heat steam from the power plant is first discharged into the heat exchange mechanism. At this time, the heat exchange mechanism begins to heat the water inside the water storage mechanism. After the waste heat steam is heated, it flows into the filter mechanism and drives the filter mechanism to automatically clean the filter screen, thereby improving the efficiency of the filter mechanism in filtering waste heat steam and greatly reducing impurities and dust contained in the waste heat steam. Simultaneously, the waste heat steam drives the turbine blades to rotate, allowing the cleaning mechanism to recycle the water vapor generated inside the water storage mechanism, enabling the water vapor to intermittently moisten the filter mechanism, thus improving the filtration effect of the filter mechanism and improving the quality of the working environment. Firstly, it ensures that the waste heat steam after exchange is filtered, and the filter screen can be wiped by the rotating cleaning brush plate, thereby ensuring the filtration efficiency of the filter screen during long-term use. Secondly, it can recycle the steam generated by heating water inside the water storage furnace and discharge the steam to the surface of the filter screen through the pressurization cylinder, thereby increasing the surface humidity of the filter screen and reducing the dust on the filter screen surface from flying and rebounding during the cleaning of the brush plate. Thirdly, it realizes intermittent humidification of the filter screen surface, making it easier to capture dust particles in a moderately moist state. Fourthly, it reduces the content of particulate matter and dust inside the waste heat steam that has completed heat exchange, creating a healthier and safer working environment. Fifthly, it allows the filtration of waste heat steam, cleaning of the filter screen and humidification of the filter screen to be completed simultaneously without the need for an additional drive mechanism, thus optimizing the overall structure of the device. Sixthly, all of the above processes are driven by waste heat steam from the power plant, and the cleaning and filtration functions are achieved by utilizing the energy of the waste heat recovery.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a heat exchange furnace for waste heat steam heat exchange in a power plant according to an embodiment of this application; Figure 2 This is a cross-sectional three-dimensional structural diagram of a heat exchange furnace for waste heat steam heat exchange in a power plant, according to an embodiment of this application. Figure 3 This is a three-dimensional structural diagram of the heat exchange mechanism, filtration mechanism, and cleaning mechanism according to embodiments of this application; Figure 4 This is a cross-sectional three-dimensional structural diagram of the water storage mechanism according to an embodiment of this application; Figure 5 This is a three-dimensional structural schematic diagram of the heat exchange mechanism according to an embodiment of this application; Figure 6 This is a three-dimensional structural schematic diagram of the filtering mechanism according to an embodiment of this application; Figure 7 This is a frontal sectional left-side perspective view of the filter mechanism according to an embodiment of this application; Figure 8 This is a right-side perspective view of the filtering mechanism according to an embodiment of this application; Figure 9 This is a frontal perspective three-dimensional structural diagram of a cleaning mechanism according to an embodiment of this application; Figure 10 This is a bottom-view perspective view of the cleaning mechanism according to an embodiment of this application; Figure 11 This is a half-sectional three-dimensional structural diagram of the pressure cylinder according to an embodiment of this application.

[0020] Icons: 1. Water storage mechanism; 101. Base plate; 102. Water storage furnace; 103. Supporting long leg; 104. Air inlet pipe; 105. Drain valve pipe; 106. Liquid inlet valve pipe; 107. Assembly cavity; 2. Heat exchange mechanism; 201. Large gas collection hood; 202. Small gas collection hood; 203. Adapter short pipe; 204. Connecting rod; 205. Connecting frame; 206. Transfer hood; 207. Heat exchange tube; 208. Transfer pipe; 209. Ventilation short pipe; 210. Exhaust pipe; 3. Filtration mechanism; 301. Gas collection round box; 302. Gas treatment box; 303. Exhaust gas inlet pipe; 304. First hollow rotating rod; 305. Turbine blade; 306. Ventilation pipe; 307. Second hollow rotating rod; 308. Cleaning brush plate; 309. Diverter cover; 310. Filter frame; 311. Filter screen; 312. Wastewater collection box; 313. Control valve; 314. Exhaust gas outlet pipe; 315. Positioning sleeve; 4. Cleaning mechanism; 401. Annular pipe; 402. Steam inlet; 403. Spiral adapter pipe; 404. Pressurizing cylinder; 405. First drive wheel; 406. First drive rod; 407. Second drive wheel; 408. Drive toothed belt; 409. Worm gear cylinder; 410. Second drive rod; 411. Reciprocating threaded cylinder; 412. Bidirectional slider; 413. Driven turbine; 414. Lower pressure frame; 415. Sealing plate; 416. Support leg; 417. Guide rod; 418. Bellows; 419. Transmission pipe; 420. First check valve; 421. Bearing; 422. Second check valve. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following description, with reference to the accompanying drawings, depicts a heat exchange furnace for waste heat steam in a power plant, according to an embodiment of this application.

[0030] like Figures 1-11 As shown in the embodiment of this application, a heat exchange furnace for power plant waste heat steam heat exchange includes: a water storage mechanism 1, a heat exchange mechanism 2, a filtration mechanism 3, and a cleaning mechanism 4.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, there is a water storage mechanism 1, a heat exchange mechanism 2, which is located at the center inside the water storage mechanism 1, a filtration mechanism 3, which is located at the lower end of the water storage mechanism 1 and the lower end of the heat exchange mechanism 2. The steam discharged from the heat exchange mechanism 2 flows into the interior of the filtration mechanism 3, and the filtration mechanism 3 filters the incoming steam. A cleaning mechanism 4, which is located at the lower end of the water storage mechanism 1 and the rear end of the filtration mechanism 3, receives steam generated by heating inside the water storage mechanism 1 and flows into the interior of the cleaning mechanism 4. The filtration mechanism 3 drives the cleaning mechanism 4 to intermittently discharge steam into the interior of the filtration mechanism 3, thereby improving the quality of the waste gas filtered by the cleaning mechanism 4.

[0032] In use, the waste heat steam from the power plant is first discharged into the heat exchange mechanism 2. At this time, the heat exchange mechanism 2 begins to heat the water inside the water storage mechanism 1. After the waste heat steam is heated, it flows into the filter mechanism 3 and drives the filter mechanism 3 to automatically clean the filter screen 311, thereby improving the efficiency of the filter mechanism 3 in filtering waste heat steam and greatly reducing the impurities and dust contained in the waste heat steam. At the same time, the waste heat steam drives the turbine blades 305 to rotate, which allows the cleaning mechanism 4 to recycle the water vapor generated inside the water storage mechanism 1, so that the water vapor can intermittently moisten the filter mechanism 3, thereby improving the effect of the filter mechanism 3 in filtering waste heat steam and improving the quality of the working environment.

[0033] like Figure 4 As shown, the water storage mechanism 1 includes a base plate 101 and a water storage furnace 102. The water storage furnace 102 is located at the upper end of the base plate 101. An air inlet pipe 104 is fixedly connected to the middle of the upper end of the water storage furnace 102. A drain valve pipe 105 is connected through the front end of the lower part of the water storage furnace 102. An inlet valve pipe 106 is connected through the front end of the upper part of the water storage furnace 102. Multiple supporting legs 103 are fixedly connected to the edges of the lower surface of the water storage furnace 102. The lower surfaces of the supporting legs 103 are fixedly connected to the upper surface of the base plate 101.

[0034] like Figure 5As shown, the heat exchange mechanism 2 includes a large gas collection hood 201, a connecting rod 204, and a heat exchange tube 207. The large gas collection hood 201 is fixedly connected to the upper end of the inner wall of the water storage furnace 102. A small gas collection hood 202 is provided at the upper end of the large gas collection hood 201. Multiple transition short pipes 203 are connected through the side walls of the small gas collection hood 202. The lower ends of the transition short pipes 203 are all connected through the large gas collection hood 201. The connecting rod 204 is fixedly connected to the middle of the lower surface of the large gas collection hood 201. The lower surface of the connecting rod 204 is fixedly connected to... A connecting frame 205 is connected, and a transfer hood 206 is fixedly connected to the middle of the lower end of the connecting frame 205. A transfer pipe 208 is fixedly connected to the edge of the lower end of the connecting frame 205. The upper ends of multiple heat exchange tubes 207 are all connected to the lower end of the large gas collection hood 201. The lower ends of the heat exchange tubes 207 all pass through the connecting frame 205 and are connected to the transfer pipe 208. Multiple short vent pipes 209 are connected to the outer wall of the transfer hood 206. The ends of the short vent pipes 209 away from the transfer hood 206 are all connected to the transfer pipe 208. 8. A through-connection is made, with an exhaust pipe 210 connected to the middle of the lower end of the transfer hood 206. The exhaust pipe 210 is located at the upper end of the base plate 101, and its lower end passes through the water storage furnace 102 and extends to the outside of the water storage furnace 102. Specifically, when using this device, the waste heat steam from the power plant is first discharged into the interior of the small gas collection hood 202 through the air inlet pipe 104. At this time, the gas inside the small gas collection hood 202 flows into the interior of the large gas collection hood 201 through the connecting short pipe 203. The gas enters the heat exchange tube 207. The high-temperature steam continuously flowing into the heat exchange tube 207 heats the water inside the water storage furnace 102. After passing through the heat exchange tube 207, the high-temperature steam enters the transfer hood 206 through the vent pipe 209. Then, the gas inside the transfer hood 206 is discharged to the outside of the water storage furnace 102 through the exhaust pipe 210. At this time, the waste heat steam continuously flowing into the air inlet pipe 104 heats the water inside the water storage furnace 102, thereby heating domestic water.

[0035] like Figure 6 , Figure 7 and Figure 8As shown, the filtration mechanism 3 includes a gas collecting box 301, a gas treatment box 302, and turbine blades 305. The gas collecting box 301 is fixedly connected to the middle of the upper surface of the base plate 101, and the gas treatment box 302 is fixedly connected to the front end of the upper surface of the base plate 101. The gas collecting box 301 is located at the rear end of the gas treatment box 302. Both the gas collecting box 301 and the gas treatment box 302 are located at the lower ends of the water storage furnace 102 and the large gas collecting hood 201. An exhaust gas inlet pipe 303 is connected through the middle of the upper end of the gas collecting box 301. The upper end of the exhaust gas inlet pipe 303 is fixedly connected to the lower end of the exhaust pipe 210. A first hollow rotating rod 304 is rotatably connected to the middle of the gas collecting box 301. Turbine blades 305 are fixedly connected to the outer wall of the first hollow rotating rod 304. 05. A waste gas outlet pipe 314 is connected to one side of the upper end of the gas collection box 301. A vent pipe 306 is fixedly connected to the upper end of the waste gas outlet pipe 314. The front end of the vent pipe 306 extends into the interior of the gas treatment box 302. A second hollow rotating rod 307 is fixedly connected to the front end of the first hollow rotating rod 304, and the first hollow rotating rod 304 and the second hollow rotating rod 307 are internally interconnected. A cleaning brush plate 308 is fixedly connected to the front end of the second hollow rotating rod 307. A diversion cover 309 is fixedly connected to the front end of the second hollow rotating rod 307. A steam spray hole is provided on the diversion cover 309. A filter frame 310 is fixedly connected to the inner wall of the gas treatment box 302 near the front end. A filter screen 31 is fixedly connected to the inner wall of the filter frame 310. 1. Turbine blades 305 are located inside the gas collecting box 301. A wastewater collection box 312 is connected to the lower part of the front end of the gas treatment box 302. A control valve 313 is connected to one side of the lower end of the wastewater collection box 312. Specifically, when using this device, the waste heat steam from the power plant first enters the water storage furnace 102 through the inlet pipe 104. The waste heat steam heats the water inside the water storage furnace 102, causing the water inside the water storage furnace 102 to begin heating. Subsequently, the waste heat steam inside the water storage furnace 102 flows into the gas collecting box 301 through the exhaust pipe 210 and the exhaust gas inlet pipe 303. At this time, the waste heat steam continuously entering the gas collecting box 301 will drive the turbine blades 305 to rotate, and at the same time drive the first The hollow rotating rod 304 rotates, which in turn drives the second hollow rotating rod 307 and the cleaning brush plate 308 to rotate. At the same time, as the turbine blades 305 rotate, the waste heat steam enters the gas treatment box 302 through the exhaust pipe 314 and the ventilation pipe 306. During the flow of the waste heat steam, it is filtered by the filter screen 311. Meanwhile, the continuously rotating cleaning brush plate 308 continuously cleans the filter screen 311 and removes the dust generated during the filtration process on the surface of the filter screen 311. This improves the filtration quality of the filter screen 311 and reduces the content of particulate matter and dust inside the waste heat steam that has undergone heat exchange, thus creating a healthier and safer working environment.

[0036] like Figure 9 , Figure 10 and Figure 11As shown, the cleaning mechanism 4 includes an annular pipe 401, a spiral adapter pipe 403, and a pressure cylinder 404. The annular pipe 401 is fixedly connected to the lower end of the large gas collection hood 201. Multiple steam inlets 402 are fixedly connected to the lower end of the annular pipe 401. An assembly cavity 107 is provided on the side wall of the water storage furnace 102. The spiral adapter pipe 403 is fixedly connected to the inside of the assembly cavity 107. The annular pipe 401 and the spiral adapter pipe 403 are connected through a flexible hose. The lower end of the spiral adapter pipe 403 extends to the outside of the water storage furnace 102. The pressure cylinder 404 is fixedly connected to one side of the rear end of the upper surface of the base plate 101. A first transmission wheel 405 is fixedly connected to the outer wall of the first hollow rotating rod 304 near its rear end. A first transmission rod 405 is rotatably connected to one side of the rear end of the upper surface of the base plate 101. 06. A second transmission wheel 407 is fixedly connected to the outer wall of the front end of the first transmission rod 406. A transmission toothed belt 408 is sleeved on the outer wall of the first transmission wheel 405 and the second transmission wheel 407. A worm gear cylinder 409 is fixedly connected to the outer wall of the rear end of the first transmission rod 406. A second transmission rod 410 is rotatably connected to one side of the rear end of the base plate 101. A reciprocating threaded cylinder 411 is fixedly connected to the outer wall of the upper end of the second transmission rod 410. A bidirectional slider 412 is sleeved on the upper end of the reciprocating threaded cylinder 411. A driven worm gear 413 is fixedly connected to the outer wall of the second transmission rod 410 near the middle. The worm gear cylinder 409 and the driven worm gear 413 mesh with each other. A lower pressure frame 414 is fixedly connected to the other side of the bidirectional slider 412. A sealing plate 4 is fixedly connected to the lower end of the lower pressure frame 414. 15. The sealing plate 415 is slidably connected inside the pressure cylinder 404. Three supporting short legs 416 are fixedly connected to the lower end of the outer wall of the pressure cylinder 404. The lower surface of the supporting short legs 416 is fixedly connected to the upper surface of the base plate 101. A bellows 418 is connected through the middle of the upper end of the sealing plate 415. The upper end of the bellows 418 is fixedly connected to the lower end of the spiral adapter pipe 403. A transmission pipe 419 is connected through the other side of the lower end of the pressure cylinder 404. A first one-way valve 420 is fixedly connected to one end of the transmission pipe 419 near the pressure cylinder 404. A positioning sleeve 315 is fixedly connected to the outer wall of the rear end of the first hollow rotating rod 304. A bearing 421 is fixedly connected to the outer wall of the transmission pipe 419 near the first hollow rotating rod 304. The bearing 421 is... The inner wall of the positioning sleeve 315 is fixedly connected to the wall, and the outer wall of the lower end of the bellows 418 is fixedly connected to the second one-way valve 422. Three guide rods 417 are fixedly connected to the inner bottom surface of the pressure cylinder 404. The sealing plate 415 is slidably connected to the outer wall of the guide rods 417. Specifically, when using this device, after the waste heat steam of the power plant completes heat exchange with the water inside the water storage furnace 102 through the heat exchange tube 207, the waste heat steam inside the heat exchange tube 207 will enter the interior of the gas collecting box 301 through the exhaust pipe 210 and the exhaust gas inlet pipe 303. At this time, the first hollow rotating rod 304 will start to rotate under the action of the turbine blade 305, and the first transmission rod 406 will start to rotate under the action of the first transmission wheel 405, the second transmission wheel 407 and the transmission toothed belt 408.At this time, the worm gear cylinder 409 begins to cooperate with the driven turbine 413, causing the second transmission rod 410 and the reciprocating threaded cylinder 411 to start rotating. Meanwhile, the lower pressure frame 414 drives the sealing plate 415 to circulate up and down inside the pressure cylinder 404. Simultaneously, as the water inside the water storage furnace 102 is continuously heated, water vapor is generated during the heating process. This water vapor enters the spiral rotating pipe 403 through the steam inlet 402, and then flows from the spiral rotating pipe 403 into the pressure cylinder 404 through the bellows 418. Under the downward pressure of the sealing plate 415, the water vapor inside the pressure cylinder 404 flows rapidly through the transmission pipe 419 to the inside of the first hollow rotating rod 304, and then from the first hollow rotating rod... The water vapor flows from rod 304 into the interior of the second hollow rotating rod 307, and then is evenly sprayed onto the surface of the filter screen 311 through the diversion cover 309. This increases the wettability of the filter screen 311 surface, allowing dust particles on the filter screen 311 to absorb moisture, increasing its weight and reducing dust scattering and rebound on the filter screen 311 surface. Simultaneously, as the sealing plate 415 moves upward inside the pressure cylinder 404, a negative pressure is generated inside the pressure cylinder 404. At this time, water vapor is absorbed from the inside of the spiral rotating pipe 403 through the bellows 418. Meanwhile, as the sealing plate 415 moves upward, the transmission pipe 419 temporarily stops supplying water vapor to the interior of the first hollow rotating rod 304, achieving intermittent supply of moisture to the surface of the filter screen 311. The effect of airflow prevents the filter screen 311 from becoming overly wet, allowing dust particles to be more easily captured in a moderately moist state without clogging the filter screen 311. During the downward movement of the sealing plate 415, the second one-way valve 422 is closed, and the first one-way valve 420 is open. During the upward movement of the sealing plate 415, the second one-way valve 422 is open, and the first one-way valve 420 is closed. By utilizing waste heat steam to drive the turbine blades 305 to rotate, firstly, the exchanged waste heat steam can be filtered, and the filter screen 311 can be wiped by the rotating cleaning brush plate 308, thus ensuring the filtration effect of the filter screen 311 during long-term use. Secondly, it can... The steam generated by heating water inside the water storage furnace 102 is recycled and discharged onto the surface of the filter screen 311 through the pressurization cylinder 404, thereby increasing the surface humidity of the filter screen 311. This reduces the amount of dust on the filter screen 311 that is blown away and bounced back during the cleaning process of the cleaning brush plate 308. Thirdly, it achieves intermittent humidification of the filter screen 311 surface, making it easier to capture dust particles in a moderately moist state. Fourthly, it reduces the content of particulate matter and dust inside the waste heat steam after heat exchange, creating a healthier and safer working environment. Fifthly, it allows the filtration of waste heat steam, cleaning of the filter screen 311, and humidification of the filter screen 311 to be completed simultaneously without the need for an additional drive mechanism, optimizing the overall structure of the device. Sixthly...The above processes are all driven by waste heat steam from the power plant, utilizing the plant's own energy to achieve cleaning and filtration functions while recovering waste heat.

[0037] Specifically, the working principle of this heat exchanger for power plant waste heat steam is as follows: When using this device, the waste heat steam from the power plant is first discharged into the small gas collecting hood 202 through the inlet pipe 104. At this time, the gas inside the small gas collecting hood 202 flows into the large gas collecting hood 201 through the transfer short pipe 203. Then, the gas inside the large gas collecting hood 201 enters the heat exchange tube 207. The high-temperature steam continuously flowing into the heat exchange tube 207 heats the water inside the water storage furnace 102. After passing through the heat exchange tube 207, the high-temperature steam enters the intermediate transfer hood 206 through the vent short pipe 209. Subsequently, the gas inside the intermediate transfer hood 206 is discharged to the outside of the water storage furnace 102 through the exhaust pipe 210. Meanwhile, the gas continuously flowing into the inlet pipe 104... The waste heat steam from the 4-stage gas tank heats the water inside the water storage furnace 102, thus heating domestic water. Subsequently, the waste heat steam inside the water storage furnace 102 flows into the gas collecting box 301 through the exhaust pipe 210 and the exhaust gas inlet pipe 303. The continuously entering waste heat steam in the gas collecting box 301 drives the turbine blades 305 to rotate, simultaneously rotating the first hollow rotating rod 304. The first hollow rotating rod 304 then drives the second hollow rotating rod 307 and the cleaning brush plate 308 to rotate. During the rotation of the turbine blades 305, the waste heat steam enters the gas treatment box 302 through the exhaust gas outlet pipe 314 and the vent pipe 306. During this flow, the waste heat steam is filtered by the filter screen 311, and... The continuously rotating cleaning brush plate 308 continuously cleans the filter screen 311, and the dust generated during the filtration process on the surface of the filter screen 311 is continuously cleaned, improving the filtration quality of the filter screen 311. Under the action of the first transmission wheel 405, the second transmission wheel 407 and the transmission toothed belt 408, the first transmission rod 406 starts to rotate. At this time, the worm gear cylinder 409 begins to cooperate with the driven worm 413, and the second transmission rod 410 and the reciprocating threaded cylinder 411 begin to rotate. At this time, the lower pressure frame 414 drives the sealing plate 415 to move up and down in the pressure cylinder 404. At the same time, since the water inside the water storage furnace 102 is continuously heated, water vapor will be generated in the water inside the water storage furnace 102 during the heating process. At this time, the water vapor will pass through the inlet... Steam enters the spiral connector 403 through the steam inlet 402, and then flows into the pressure cylinder 404 through the bellows 418. Inside the pressure cylinder 404, water vapor is pressurized downwards by the sealing plate 415 and then rapidly flows through the transmission pipe 419 to the first hollow rotating rod 304, and then to the second hollow rotating rod 307. Finally, the steam is evenly sprayed onto the surface of the filter screen 311 through the diverter cover 309, thereby increasing the wettability of the filter screen 311 surface. This allows dust particles on the filter screen 311 to absorb moisture, increasing its weight and reducing dust scattering and rebound on the filter screen 311 surface. Simultaneously, as the sealing plate 415 moves upwards inside the pressure cylinder 404...A negative pressure is generated inside the pressure cylinder 404. At this time, water vapor is absorbed from inside the spiral connecting pipe 403 through the bellows 418. Simultaneously, as the sealing plate 415 moves upward, the transmission pipe 419 temporarily stops supplying water vapor to the inside of the first hollow rotating rod 304. This achieves the effect of intermittently providing moisture to the surface of the filter screen 311, thus preventing the filter screen 311 from becoming overly wetted. This allows dust particles to be more easily captured in a moderately moist state without clogging the filter screen 311.

[0038] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A heat exchange furnace for waste heat steam heat exchange in power plants, characterized in that, include: Water storage mechanism (1); A heat exchange mechanism (2) is located at the center inside the water storage mechanism (1); The filter mechanism (3) is located at the lower end of the water storage mechanism (1) and at the lower end of the heat exchange mechanism (2). The steam discharged from the heat exchange mechanism (2) flows into the interior of the filter mechanism (3), and the filter mechanism (3) filters the incoming steam. The cleaning mechanism (4) is located at the lower end of the water storage mechanism (1) and at the rear end of the filter mechanism (3). The steam generated by the heating inside the water storage mechanism (1) flows into the interior of the cleaning mechanism (4). The filter mechanism (3) drives the cleaning mechanism (4) to intermittently discharge steam into the interior of the filter mechanism (3), thereby improving the quality of the waste gas filtered by the cleaning mechanism (4).

2. The heat exchange furnace for waste heat steam heat exchange in power plants according to claim 1, characterized in that, The water storage mechanism (1) includes a base plate (101) and a water storage furnace (102). The water storage furnace (102) is located at the upper end of the base plate (101). An air inlet pipe (104) is fixedly connected to the middle of the upper end of the water storage furnace (102). A drain valve pipe (105) is connected through the front end of the lower part of the water storage furnace (102). An inlet valve pipe (106) is connected through the front end of the upper part of the water storage furnace (102).

3. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 2, characterized in that, Multiple supporting legs (103) are fixedly connected to the edge of the lower surface of the water storage furnace (102), and the lower surface of the supporting legs (103) is fixedly connected to the upper surface of the base plate (101).

4. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 2, characterized in that, The heat exchange mechanism (2) includes a large gas collection hood (201), a connecting rod (204), and a heat exchange tube (207). The large gas collection hood (201) is fixedly connected to the upper end of the inner wall of the water storage furnace (102). A small gas collection hood (202) is provided at the upper end of the large gas collection hood (201). Multiple transition short pipes (203) are connected through the side walls of the small gas collection hoods (202). The lower ends of the transition short pipes (203) are all connected through the large gas collection hood (201). The connecting rod (204) is fixedly connected to the middle of the lower surface of the large gas collection hood (201). A connecting frame (205) is fixedly connected to the lower surface of the connecting rod (204). A connecting frame (207) is fixedly connected to the middle of the lower end of the connecting frame (205). The transfer hood (206) has a transfer pipe (208) fixedly connected to the lower edge of the connecting frame (205). The upper ends of multiple heat exchange pipes (207) are all connected to the lower end of the large gas collection hood (201). The lower ends of the heat exchange pipes (207) all pass through the connecting frame (205) and are connected to the transfer pipes (208). Multiple ventilation short pipes (209) are connected to the outer wall of the transfer hood (206). The end of the ventilation short pipe (209) away from the transfer hood (206) is connected to the transfer pipe (208). An exhaust pipe (210) is connected to the middle of the lower end of the transfer hood (206). The exhaust pipe (210) is located at the upper end of the base plate (101).

5. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 4, characterized in that, The lower end of the exhaust pipe (210) passes through the water storage furnace (102) and extends to the outside of the water storage furnace (102).

6. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 4, characterized in that, The filtration mechanism (3) includes a gas collecting box (301), a gas processing box (302), and turbine blades (305). The gas collecting box (301) is fixedly connected to the middle of the upper surface of the base plate (101), and the gas processing box (302) is fixedly connected to the front end of the upper surface of the base plate (101). The gas collecting box (301) is located at the rear end of the gas processing box (302). Both the gas collecting box (301) and the gas processing box (302) are located at the lower end of the water storage furnace (102) and the large gas collecting hood (201). The upper end of the gas collecting box (301) is... A waste gas inlet pipe (303) is connected through the middle of the gas collection box (301). The upper end of the waste gas inlet pipe (303) is fixedly connected to the lower end of the exhaust pipe (210). A first hollow rotating rod (304) is rotatably connected to the middle of the gas collection box (301). A turbine blade (305) is fixedly connected to the outer wall of the first hollow rotating rod (304). A waste gas outlet pipe (314) is connected through one side of the upper end of the gas collection box (301). A ventilation pipe (306) is fixedly connected to the upper end of the waste gas outlet pipe (314). The front end of the ventilation pipe (306) extends into the interior of the gas treatment box (302). The front end of the first hollow rotating rod (304) is fixedly connected to the second hollow rotating rod (307), and the first hollow rotating rod (304) and the second hollow rotating rod (307) are internally connected to each other. The front end of the second hollow rotating rod (307) is fixedly connected to the cleaning brush plate (308), and the front end of the second hollow rotating rod (307) is fixedly connected to the diversion cover (309). The diversion cover (309) is provided with steam spray holes. The inner wall of the gas treatment box (302) near the front end is fixedly connected to the filter frame (310), and the inner wall of the filter frame (310) is fixedly connected to the filter screen (311).

7. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 6, characterized in that, The turbine blades (305) are located inside the gas collecting box (301).

8. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 6, characterized in that, A sewage collection box (312) is connected through the lower part of the front end of the gas treatment box (302), and a control valve (313) is connected through the lower side of the sewage collection box (312).

9. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 6, characterized in that, The cleaning mechanism (4) includes an annular pipe (401), a spiral connecting pipe (403), and a pressurizing cylinder (404). The annular pipe (401) is fixedly connected to the lower end of the large gas collection hood (201). Multiple steam inlets (402) are fixedly connected to the lower end of each annular pipe (401). An assembly cavity (107) is provided on the side wall of the water storage furnace (102). The spiral connecting pipe (403) is fixedly connected to the inside of the assembly cavity (107). The annular pipe (401) and the spiral connecting pipe (403) are connected through a flexible hose. The lower end of 03) extends to the outside of the water storage furnace (102). The pressure cylinder (404) is fixedly connected to one side of the rear end of the upper surface of the base plate (101). The first hollow rotating rod (304) is fixedly connected to the outer wall near the rear end of the first transmission wheel (405). The first transmission rod (406) is rotatably connected to one side of the rear end of the upper surface of the base plate (101). The outer wall of the front end of the first transmission rod (406) is fixedly connected to the second transmission wheel (407). The outer walls of the first transmission wheel (405) and the second transmission wheel (407) are fitted with a transmission toothed belt (408). A worm gear cylinder (409) is fixedly connected to the outer wall of the rear end of the first transmission rod (406). A second transmission rod (410) is rotatably connected to one side of the rear end of the base plate (101). A reciprocating threaded cylinder (411) is fixedly connected to the outer wall of the upper end of the second transmission rod (410). A bidirectional slider (412) is sleeved on the upper end of the reciprocating threaded cylinder (411). A driven turbine (413) is fixedly connected to the outer wall of the second transmission rod (410) near the middle. The worm gear cylinder (409) and the driven turbine (413) mesh with each other. A lower pressure frame (414) is fixedly connected to the other side of the bidirectional slider (412). A sealing plate (415) is fixedly connected to the lower end of the lower pressure frame (414). The sealing plate (415) is slidably connected inside the pressure cylinder (404). Three supporting short legs (416) are fixedly connected to the lower end of the outer wall of the pressure cylinder (404). The lower surface of the supporting short leg (416) is fixedly connected to the upper surface of the base plate (101). A bellows (418) is connected through the middle of the upper end of the sealing plate (415). The upper end of the bellows (418) is fixedly connected to the lower end of the spiral adapter pipe (403). A transmission pipe (419) is connected through the other side of the lower end of the pressure cylinder (404). A first one-way valve (420) is fixedly connected to one end of the transmission pipe (419) near the pressure cylinder (404). A positioning sleeve (315) is fixedly connected to the outer wall of the rear end of the first hollow rotating rod (304). A bearing (421) is fixedly connected to the outer wall of the transmission pipe (419) near the first hollow rotating rod (304). The outer wall of the bearing (421) is fixedly connected to the inner wall of the positioning sleeve (315). A second one-way valve (422) is fixedly connected to the outer wall of the lower end of the bellows (418).

10. A heat exchange furnace for waste heat steam heat exchange in power plants according to claim 9, characterized in that, Three guide rods (417) are fixedly connected to the inner bottom surface of the pressure cylinder (404), and the sealing plate (415) is slidably connected to the outer wall of the guide rods (417).

Images