Waste heat recovery device for power plant

Abstract

The invention provides a power plant waste heat recovery device, and relates to the field of waste heat recovery devices. The device comprises a pretreatment device, a recycling device, a heat exchange device and a discharging device, the recycling device is arranged on one side of the pretreatment device, the heat exchange device is arranged in the recycling device, the discharging device is arranged on one side of the recycling device, and the pretreatment device comprises a first supporting plate. By arranging the pretreatment device, waste gas can be preliminarily purified, heat generated in the combustion process can be effectively recycled, by arranging the recycling device, the moving path of gas in the second tank body is effectively increased, the heat exchange efficiency is improved, and the energy loss is reduced; and residual heat in the waste gas is further collected effectively, the energy utilization rate is increased, impurities in the waste gas are effectively filtered through the exhaust device, and pollution to the environment is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery devices, and in particular to a waste heat recovery device for a power plant. Background Art

[0002] Power generation in power plants is an important part of maintaining the development and progress of human society. Electricity is closely related to human life. From material life such as food, clothing, housing and transportation to spiritual life such as culture, art and entertainment, electricity is indispensable. However, coal-fired power generation produces a large amount of sulfur dioxide, which causes great pollution to the environment. They use the heat energy generated by coal combustion to heat water, turning the water into high-temperature, high-pressure steam, and then the steam drives the generator to generate electricity.

[0003] In the prior art, coal-fired power generation equipment burns coal and generates a large amount of exhaust gas with waste heat. However, the power plant directly discharges the exhaust gas, and part of the energy carried away by the exhaust gas will enter the air, thereby causing environmental pollution and wasting energy. Therefore, technical personnel in this field provide a power plant waste heat recovery device to solve the problems raised in the above background technology. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the present invention provides a waste heat recovery device for a power plant, which solves the problem of fully burning the waste gas when the waste gas is discharged and making full use of the residual heat in the waste gas.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A waste heat recovery device for a power plant, comprising a pretreatment device, a recycling device, a heat exchange device and a discharge device, wherein the recycling device is arranged on one side of the pretreatment device, the heat exchange device is arranged inside the recycling device, and the discharge device is arranged on one side of the recycling device. The pretreatment device comprises a first support plate, a first tank body is fixedly connected to the top of the first support plate, an air intake pipe is fixedly connected to the middle of the other side of the first tank body, a first exhaust pipe is fixedly connected to one side of the top of the first tank body, a liquid storage tank is fixedly connected to the other side of the top of the first tank body, a heat exchange tank is fixedly connected to the middle of the inner wall of the first tank body, an ignition device is fixedly connected to the top and bottom of the inner wall of the first tank body respectively, a drain pipe is fixedly connected to the other side of the top of the heat exchange tank, a first drain pipe is fixedly connected to the bottom of the drain pipe, a first slide rod is slidably connected to one side of the inner wall of the first drain pipe, a sealing plug is fixedly connected to one end of the first slide rod, a connecting rod is rotatably connected to the side wall of the first drain pipe, a floating ball is fixedly connected to one end of the connecting rod, and a first connecting pipe is fixedly connected to the middle of one side of the first tank body.

[0008] Preferably: the recycling device includes a second support plate, a second tank body is fixedly connected to the other side of the top of the second support plate, a motor is fixedly connected to the top of the second support plate and located below the second tank body, a first rotating shaft is rotatably connected to the middle of the top of the motor, a first transmission bevel gear is fixedly connected to the side wall of the first rotating shaft, a fan is fixedly connected to the top of the first transmission bevel gear, a third connecting pipe is fixedly connected to the middle of the inner wall of the second tank body, a second connecting pipe is fixedly connected to the middle of the bottom end of the inner wall of the second tank body, the first connecting pipe is fixedly connected to the top of the inner wall of the second tank body, a second connecting pipe is fixedly connected to the middle of the top of the second tank body, and the other side of the second support plate is fixedly connected to the middle of one side of the first support plate.

[0009] Preferably: the heat exchange device comprises two first heat exchange tubes, a water injection pipe is fixedly connected to the rear side of the side wall of the first heat exchange tube located at the upper position of the side wall of the second tank body, a second drainage pipe is fixedly connected to the front side of the side wall of the first heat exchange tube located at the lower position of the side wall of the second tank body, a valve is fixedly connected to the side wall of the second drainage pipe, a pressure gauge is fixedly connected to the top of the valve, a second heat exchange tube is arranged between the two first heat exchange tubes, a third heat exchange tube is arranged between the two second heat exchange tubes, a fourth heat exchange tube is arranged between the two third heat exchange tubes, a third connecting pipe is arranged on the side walls of the two first heat exchange tubes, the two second heat exchange tubes, the two third heat exchange tubes and the two fourth heat exchange tubes, and the two first heat exchange tubes are fixedly connected to the upper and lower positions of the side wall of the second tank body, respectively.

[0010] The transmission gear of the present invention is a gear which is connected with the toothed wheel of the transmission gear of the present invention, and the gear is connected with the toothed wheel of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the transmission gear of the

[0011] Preferably: the top end of the drain pipe passes through the inner wall of the first tank body and is connected to the interior of the liquid storage tank, the bottom end of the drain pipe passes through the side wall of the heat exchange tank and is connected to the interior of the first drain pipe, the bottom end of the first exhaust pipe passes through the top of the first tank body and is connected to the interior of the heat exchange tank, the other end of the first sliding rod passes through the inner wall of the first drain pipe and is rotatably connected to the other end of the connecting rod, and the other end of the first connecting pipe is fixedly connected to the other side of the top of the second tank body.

[0012] Preferably: the output end of the motor is fixedly connected to the bottom end of the first rotating shaft, the top end of the first rotating shaft passes through the bottom end of the second tank body and is fixedly connected to the middle of the bottom end of the fan, the first transmission bevel gear is meshed with the first driven bevel gear, and the top end of the third connecting pipe passes through the middle of the top end of the inner wall of the second tank body.

[0013] Preferably: the two second heat exchange tubes are fixedly connected to the upper and lower positions of the side wall of the first connecting tube respectively, the two third heat exchange tubes are fixedly connected to the upper and lower positions of the side wall of the second connecting tube respectively, and the two fourth heat exchange tubes are fixedly connected to the middle part of the side wall of the third connecting tube respectively.

[0014] Preferably: a plurality of second sliding rods are respectively slidably connected to the fixed rings, the bottom end of the third rotating shaft passes through the middle of the bottom end of the inner wall of the water injection pipe and is fixedly connected to the middle of the top end of the second driven bevel gear, the second driven bevel gear is meshingly connected to the second transmission bevel gear, one end of the second rotating shaft passes through the other side of the bottom end of the third tank body and is fixedly connected to the middle of the second transmission bevel gear, the other end of the second rotating shaft passes through one side of the bottom end of the second tank body and is fixedly connected to the middle of the first driven bevel gear, and the bottom end of the scraper is slidably connected to the bottom end of the filter screen.

[0015] Working principle: water is poured into the liquid storage tank 105, and the water in the liquid storage tank 105 flows into the heat exchange tank 104 through the drain pipe 108. As the liquid level in the heat exchange tank 104 rises, the float 1011 moves upward, which can drive the sealing plug 1014 to move, thereby sealing the first drain pipe 109. The exhaust gas and air generated during the power generation process are filled into the first tank body 101 through the air inlet pipe 103. After the gas enters the first tank body 101, the ignition device 1010 is used to ignite the exhaust gas to burn, thereby heating the water in the heat exchange tank 104, so that the water vapor generated by the heated water is discharged through the first exhaust pipe 106. After the combustion is completed, the exhaust gas and heat are transmitted to the second tank body 201 through the first connecting pipe 107, and the motor 2010 is turned on to drive the fan 207 to rotate. The high-temperature gas can pass through the first connecting pipe 205, the second connecting pipe 204 and the third connecting pipe 206 in sequence. Water is added to the water injection pipe 301 during the movement of the gas, so that the high-temperature gas can exchange heat with the water in the heat exchange device 3. After the pressure gauge 306 detects that the water has reached a certain pressure, the water after heat exchange is discharged for use. Finally, the gas is transmitted to the third tank body 401, and the impurities in the exhaust gas are filtered through the filter screen 4013, and the exhaust gas is discharged through the exhaust pipe 402. The first transmission bevel gear 209 drives the first driven bevel gear 407 to transmit. Under the transmission of the second rotating shaft 405, the second transmission bevel gear 404 will drive the second driven bevel gear 403 to rotate, so that the scraper 4012 can clean the impurities on the filter screen 4013.

[0016] (III) Beneficial effects

[0017] The present invention provides a waste heat recovery device for a power plant, which has the following beneficial effects:

[0018] 1. By setting up a pretreatment device, water is poured into the liquid storage tank, and the water in the liquid storage tank flows into the heat exchange tank through the drain pipe. As the liquid level in the heat exchange tank rises, the float moves upward, which can drive the sealing plug to move, thereby sealing the first drain pipe. The exhaust gas and air generated in the power generation process are filled into the first tank body through the air inlet pipe. After the gas enters the first tank body, the ignition device is used to ignite the exhaust gas to burn, thereby heating the water in the heat exchange tank, and the water vapor generated by the heated water is discharged through the first exhaust pipe. By burning the exhaust gas, the exhaust gas can be preliminarily purified, and the heat generated in the combustion process can be effectively recovered.

[0019] 2. By setting up a recycling device, the exhaust gas and heat after combustion are transmitted to the second tank body through the first connecting pipe. The motor is turned on to drive the fan to rotate, so that the high-temperature gas can pass through the first connecting pipe, the second connecting pipe and the third connecting pipe in turn, effectively increasing the movement path of the gas in the second tank body, improving the efficiency of heat exchange and reducing energy loss.

[0020] 3. By setting up a heat exchange device and adding water to the water injection pipe during the movement of the gas, the high-temperature gas can exchange heat with the water in the heat exchange device. After the pressure gauge detects that the water has reached a certain pressure, the water after heat exchange is discharged for use, which effectively collects the residual heat in the exhaust gas and increases energy utilization.

[0021] 4. By setting up the discharge device, the gas is transmitted into the third tank body, the impurities in the exhaust gas are filtered through the filter, and the exhaust gas is discharged through the exhaust pipe. The first transmission bevel gear drives the first driven bevel gear to drive. Under the transmission of the second shaft, the second transmission bevel gear will drive the second driven bevel gear to rotate, so that the scraper can clean the impurities on the filter, effectively filter the impurities in the exhaust gas, and avoid pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a cross-sectional structural schematic diagram of the recycling device of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the heat exchange device of the present invention;

[0025] Figure 4 It is a front view structural schematic diagram of the present invention;

[0026] Figure 5 It is a cross-sectional structural schematic diagram of the discharge device of the present invention;

[0027] Figure 6 for Figure 4 A magnified schematic diagram of center A.

[0028] Among them, 1. pretreatment device; 101. first tank body; 102. first support plate; 103. air inlet pipe; 104. heat exchange tank; 105. liquid storage tank; 106. first exhaust pipe; 107. first connecting pipe; 108. drain pipe; 109. first drain pipe; 1010. ignition device; 1011. float; 1012. connecting rod; 1013. first slide rod; 1014. sealing plug; 2. recycling device; 201. second tank body; 202. second connecting pipe; 203. second support plate; 204. second connecting pipe; 205. first connecting pipe; 206. third connecting pipe; 207. fan; 208. first rotating shaft; 209. first transmission inclined Gear; 2010, motor; 3, heat exchange device; 301, water injection pipe; 302, first heat exchange pipe; 303, second heat exchange pipe; 304, third heat exchange pipe; 305, fourth heat exchange pipe; 306, pressure gauge; 307, valve; 308, second drain pipe; 309, third connecting pipe; 4, discharge device; 401, third tank; 402, exhaust pipe; 403, second driven bevel gear; 404, second transmission bevel gear; 405, second rotating shaft; 406, explosion-proof valve; 407, first driven bevel gear; 408, third rotating shaft; 409, spring; 4010, fixing ring; 4011, second slide rod; 4012, scraper; 4013, filter. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1-6As shown, an embodiment of the present invention provides a waste heat recovery device for a power plant, comprising a pretreatment device 1, a recycling device 2, a heat exchange device 3 and a discharge device 4, wherein the recycling device 2 is arranged on one side of the pretreatment device 1, the heat exchange device 3 is arranged inside the recycling device 2, and the discharge device 4 is arranged on one side of the recycling device 2, the pretreatment device 1 comprises a first support plate 102, a first tank body 101 is fixedly connected to the top of the first support plate 102, an air intake pipe 103 is fixedly connected to the middle of the other side of the first tank body 101, and the first tank body 101 is fixedly connected to the air intake pipe 103. A first exhaust pipe 106 is fixedly connected to one side of the top of the first tank body 101, a liquid storage tank 105 is fixedly connected to the other side of the top of the first tank body 101, a heat exchange tank 104 is fixedly connected to the middle of the inner wall of the first tank body 101, an ignition device 1010 is fixedly connected to the top and bottom of the inner wall of the first tank body 101, a drain pipe 108 is fixedly connected to the other side of the top of the heat exchange tank 104, a first drain pipe 109 is fixedly connected to the bottom of the drain pipe 108, a first slide bar 1013 is slidably connected to one side of the inner wall of the first drain pipe 109, and a first slide bar 1013 is slidably connected to the first drain pipe 109. A sealing plug 1014 is fixedly connected to one end of a sliding rod 1013, a connecting rod 1012 is rotatably connected to the side wall of the first drain pipe 109, a floating ball 1011 is fixedly connected to one end of the connecting rod 1012, and a first connecting pipe 107 is fixedly connected to the middle of one side of the first tank body 101. By setting the pretreatment device 1, water is poured into the liquid storage tank 105, and the water in the liquid storage tank 105 flows into the heat exchange tank 104 through the drain pipe 108. As the liquid level in the heat exchange tank 104 rises, the floating ball 1011 moves upward, which can drive the sealing plug 1 014 moves, thereby sealing the first drain pipe 109, and the exhaust gas and air generated in the power generation process are filled into the first tank body 101 through the air inlet pipe 103. After the gas enters the first tank body 101, the ignition device 1010 is used to ignite the exhaust gas, so that the water in the heat exchange tank 104 is heated, and the water vapor generated by the heated water is discharged through the first exhaust pipe 106. The exhaust gas can be preliminarily purified by burning it, and the heat generated in the combustion process can be effectively recovered.

[0032] The recycling device 2 includes a second support plate 203, the other side of the top of the second support plate 203 is fixedly connected to the second tank body 201, the top of the second support plate 203 and located below the second tank body 201 is fixedly connected to a motor 2010, the middle of the top of the motor 2010 is rotatably connected to a first rotating shaft 208, the side wall of the first rotating shaft 208 is fixedly connected to a first transmission bevel gear 209, the top of the first transmission bevel gear 209 is fixedly connected to a fan 207, the middle of the inner side wall of the second tank body 201 is fixedly connected to a third connecting pipe 206, the middle of the bottom end of the inner side wall of the second tank body 201 is fixedly connected to a second connecting pipe 204, and the inner side wall of the second tank body 201 is fixedly connected to a A first connecting pipe 205 is fixedly connected to the top, a second connecting pipe 202 is fixedly connected to the middle of the top of the second tank body 201, and the other side of the second support plate 203 is fixedly connected to the middle of one side of the first support plate 102. By setting a recycling device 2, the exhaust gas and heat after the combustion are completed are transmitted to the second tank body 201 through the first connecting pipe 107, and the motor 2010 is turned on to drive the fan 207 to rotate, so that the high-temperature gas can pass through the first connecting pipe 205, the second connecting pipe 204 and the third connecting pipe 206 in turn, effectively increasing the moving path of the gas in the second tank body 201, improving the efficiency of heat exchange, and reducing energy loss.

[0033] The heat exchange device 3 includes two first heat exchange tubes 302, and a water injection pipe 301 is fixedly connected to the rear side of the first heat exchange tube 302 located at the upper side of the second tank body 201. A second drain pipe 308 is fixedly connected to the front side of the first heat exchange tube 302 located at the lower side of the second tank body 201. A valve 307 is fixedly connected to the side wall of the second drain pipe 308, and a pressure gauge 306 is fixedly connected to the top of the valve 307. A second heat exchange tube 303 is arranged between the two first heat exchange tubes 302, a third heat exchange tube 304 is arranged between the two second heat exchange tubes 303, and a fourth heat exchange tube 304 is arranged between the two third heat exchange tubes 304. 305, the side walls of the two first heat exchange tubes 302, the two second heat exchange tubes 303, the two third heat exchange tubes 304 and the two fourth heat exchange tubes 305 are all provided with a third connecting pipe 309, the two first heat exchange tubes 302 are respectively fixedly connected to the upper and lower positions of the side walls of the second tank body 201, and by providing a heat exchange device 3, water is added to the water injection pipe 301 during the movement of the gas, so that the high-temperature gas can exchange heat with the water in the heat exchange device 3, and after the pressure gauge 306 detects that the water has generated a certain pressure, the water after heat exchange is discharged for use, thereby effectively collecting the residual heat in the exhaust gas and increasing the energy utilization rate.

[0034] The discharge device 4 includes a third tank body 401, a second driven bevel gear 403 is rotatably connected to the middle of the bottom end of the third tank body 401, a second transmission bevel gear 404 is rotatably connected to one side of the bottom end of the third tank body 401, a second rotating shaft 405 is rotatably connected to the other side of the bottom end of the third tank body 401, an explosion-proof valve 406 is fixedly connected to the lower position of the side wall of the third tank body 401, the other end of the second rotating shaft 405 is fixedly connected to the first driven bevel gear 407, an exhaust pipe 402 is fixedly connected to one side of the side wall of the third tank body 401 at a lower position, a third rotating shaft 408 is rotatably connected to the bottom end of the inner side wall of the third tank body 401, a scraper 4012 is fixedly connected to the top of the third rotating shaft 408, a fixing ring 4010 is fixedly connected to the upper position of the inner side wall of the third tank body 401, and the bottom end of the fixing ring 4010 is in a circular array There are a plurality of second slide bars 4011, and a plurality of side walls of the second slide bars 4011 are respectively sleeved with springs 409, and a plurality of bottom ends of the second slide bars 4011 are fixedly connected with a filter screen 4013, and the bottom end of the third tank body 401 is fixedly connected to one side of the top end of the second support plate 203. By setting a discharge device 4, the gas is transmitted into the third tank body 401, and the impurities in the exhaust gas are filtered through the filter screen 4013 and discharged through the exhaust pipe 402. The first transmission bevel gear 209 drives the first driven bevel gear 407 for transmission. Under the transmission of the second rotating shaft 405, the second transmission bevel gear 404 will drive the second driven bevel gear 403 to rotate, so that the scraper 4012 can clean the impurities on the filter screen 4013, effectively filter the impurities in the exhaust gas, and avoid pollution to the environment.

[0035] The top end of the drain pipe 108 passes through the inner wall of the first tank body 101 and is connected to the inside of the liquid storage tank 105, the bottom end of the drain pipe 108 passes through the side wall of the heat exchange tank 104 and is connected to the inside of the first drain pipe 109, the bottom end of the first exhaust pipe 106 passes through the top of the first tank body 101 and is connected to the inside of the heat exchange tank 104, the other end of the first sliding rod 1013 passes through the inner wall of the first drain pipe 109 and is rotatably connected to the other end of the connecting rod 1012, the other end of the first connecting pipe 107 is fixedly connected to the other side of the top of the second tank body 201, the output end of the motor 2010 is fixedly connected to the bottom end of the first rotating shaft 208, the top end of the first rotating shaft 208 passes through the bottom end of the second tank body 201 and is fixedly connected to the middle part of the bottom end of the fan 207, the first transmission bevel gear 209 is meshed with the first driven bevel gear 407, the top end of the third connecting pipe 206 passes through the middle of the top end of the inner wall of the second tank body 201, and the two second heat exchange pipes 303 are respectively connected to the first The upper and lower positions of the side wall of a connecting pipe 205 are fixedly connected, the two third heat exchange pipes 304 are respectively fixedly connected to the upper and lower positions of the side wall of the second connecting pipe 204, the two fourth heat exchange pipes 305 are respectively fixedly connected to the middle part of the side wall of the third connecting pipe 206, a plurality of second sliding rods 4011 are respectively slidably connected to the fixing ring 4010, the bottom end of the third rotating shaft 408 passes through the middle part of the bottom end of the inner wall of the water injection pipe 301 and is fixedly connected to the middle part of the top end of the second driven bevel gear 403, the second driven bevel gear 403 is meshedly connected to the second transmission bevel gear 404, one end of the second rotating shaft 405 passes through the other side of the bottom end of the third tank body 401 and is fixedly connected to the middle part of the second transmission bevel gear 404, the other end of the second rotating shaft 405 passes through one side of the bottom end of the second tank body 201 and is fixedly connected to the middle part of the first driven bevel gear 407, and the bottom end of the scraper 4012 is slidably connected to the bottom end of the filter screen 4013.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a power plant, comprising a pretreatment device (1), a recycling device (2), a heat exchange device (3) and a discharge device (4), wherein the recycling device (2) is arranged on one side of the pretreatment device (1), the heat exchange device (3) is arranged inside the recycling device (2), and the discharge device (4) is arranged on one side of the recycling device (2), characterized in that: The pretreatment device (1) comprises a first support plate (102), the top of the first support plate (102) is fixedly connected to a first tank body (101), the middle of the other side of the first tank body (101) is fixedly connected to an air intake pipe (103), one side of the top of the first tank body (101) is fixedly connected to a first exhaust pipe (106), the other side of the top of the first tank body (101) is fixedly connected to a liquid storage tank (105), the middle of the inner side wall of the first tank body (101) is fixedly connected to a heat exchange tank (104), and the top and bottom of the inner side wall of the first tank body (101) are respectively fixedly connected to an ignition device (1010). ), a drain pipe (108) is fixedly connected to the other side of the top of the heat exchange tank (104), a first drain pipe (109) is fixedly connected to the bottom end of the drain pipe (108), a first slide rod (1013) is slidably connected to one side of the inner wall of the first drain pipe (109), a sealing plug (1014) is fixedly connected to one end of the first slide rod (1013), a connecting rod (1012) is rotatably connected to the side wall of the first drain pipe (109), a floating ball (1011) is fixedly connected to one end of the connecting rod (1012), and a first connecting pipe (107) is fixedly connected to the middle of one side of the first tank body (101).

2. A waste heat recovery device for a power plant according to claim 1, characterized in that: The recycling device (2) comprises a second support plate (203), the other side of the top end of the second support plate (203) is fixedly connected to a second tank body (201), the top end of the second support plate (203) and located below the second tank body (201) is fixedly connected to an electric motor (2010), the middle part of the top end of the electric motor (2010) is rotatably connected to a first rotating shaft (208), the side wall of the first rotating shaft (208) is fixedly connected to a first transmission bevel gear (209), the top of the first transmission bevel gear (209) is fixedly connected to a first rotating shaft (208), and the first transmission bevel gear (209) is fixedly connected to a first rotating shaft (208). The second tank body (201) is fixedly connected to the inner wall of the second tank body (201) with a fan (207); a third connecting pipe (206) is fixedly connected to the middle of the inner wall of the second tank body (201); a second connecting pipe (204) is fixedly connected to the middle of the bottom end of the inner wall of the second tank body (201); a first connecting pipe (205) is fixedly connected to the top of the inner wall of the second tank body (201); a second connecting pipe (202) is fixedly connected to the middle of the top of the second tank body (201); and the other side of the second support plate (203) is fixedly connected to the middle of one side of the first support plate (102).

3. The waste heat recovery device for a power plant according to claim 1, characterized in that: The heat exchange device (3) comprises two first heat exchange tubes (302), a water injection pipe (301) is fixedly connected to the rear side of the side wall of the first heat exchange tube (302) located at the upper side of the side wall of the second tank body (201), a second drainage pipe (308) is fixedly connected to the front side of the side wall of the first heat exchange tube (302) located at the lower side of the side wall of the second tank body (201), a valve (307) is fixedly connected to the side wall of the second drainage pipe (308), a pressure gauge (306) is fixedly connected to the top of the valve (307), and the two first heat exchange tubes (302) are fixedly connected to the front side of the side wall of the first heat exchange tube (302). ), a second heat exchange tube (303) is arranged between the two second heat exchange tubes (303), a third heat exchange tube (304) is arranged between the two third heat exchange tubes (304), a fourth heat exchange tube (305) is arranged between the two third heat exchange tubes (304), and a third connecting tube (309) is arranged on the side walls of the two first heat exchange tubes (302), the two second heat exchange tubes (303), the two third heat exchange tubes (304) and the two fourth heat exchange tubes (305). The two first heat exchange tubes (302) are fixedly connected to the upper and lower positions of the side walls of the second tank body (201), respectively.

4. The waste heat recovery device for a power plant according to claim 1, characterized in that: The discharge device (4) comprises a third tank body (401), a second driven bevel gear (403) is rotatably connected to the middle of the bottom end of the third tank body (401), a second transmission bevel gear (404) is rotatably connected to one side of the bottom end of the third tank body (401), a second rotating shaft (405) is rotatably connected to the other side of the bottom end of the third tank body (401), an explosion-proof valve (406) is fixedly connected to the lower part of the side wall of the third tank body (401), the other end of the second rotating shaft (405) is fixedly connected to the first driven bevel gear (407), and an exhaust pipe (402) is fixedly connected to the lower part of one side of the side wall of the third tank body (401). The bottom end of the inner wall of the third tank body (401) is rotatably connected to a third rotating shaft (408), the top of the third rotating shaft (408) is fixedly connected to a scraper (4012), the inner wall of the third tank body (401) is fixedly connected to a fixing ring (4010) at an upper position, the bottom end of the fixing ring (4010) is provided with a plurality of second sliding rods (4011) in a circular array, the side walls of the plurality of second sliding rods (4011) are respectively sleeved with springs (409), the bottom ends of the plurality of second sliding rods (4011) are fixedly connected to a filter screen (4013), and the bottom end of the third tank body (401) is fixedly connected to one side of the top end of the second support plate (203).

5. The waste heat recovery device for a power plant according to claim 1, characterized in that: The top end of the drain pipe (108) passes through the inner wall of the first tank body (101) and is connected to the interior of the liquid storage tank (105); the bottom end of the drain pipe (108) passes through the side wall of the heat exchange tank (104) and is connected to the interior of the first drain pipe (109); the bottom end of the first exhaust pipe (106) passes through the top of the first tank body (101) and is connected to the interior of the heat exchange tank (104); the other end of the first sliding rod (1013) passes through the inner wall of the first drain pipe (109) and is rotatably connected to the other end of the connecting rod (1012); and the other end of the first connecting pipe (107) is fixedly connected to the other side of the top of the second tank body (201).

6. A waste heat recovery device for a power plant according to claim 2, characterized in that: The output end of the motor (2010) is fixedly connected to the bottom end of the first rotating shaft (208); the top end of the first rotating shaft (208) passes through the bottom end of the second tank body (201) and is fixedly connected to the middle of the bottom end of the fan (207); the first transmission bevel gear (209) is meshingly connected to the first driven bevel gear (407); and the top end of the third connecting pipe (206) passes through the middle of the top end of the inner wall of the second tank body (201).

7. A waste heat recovery device for a power plant according to claim 3, characterized in that: The two second heat exchange tubes (303) are respectively fixedly connected to the upper position and the lower position of the side wall of the first connecting tube (205), the two third heat exchange tubes (304) are respectively fixedly connected to the upper position and the lower position of the side wall of the second connecting tube (204), and the two fourth heat exchange tubes (305) are respectively fixedly connected to the middle part of the side wall of the third connecting tube (206).

8. A waste heat recovery device for a power plant according to claim 4, characterized in that: A plurality of second sliding rods (4011) are respectively slidably connected to the fixing ring (4010); the bottom end of the third rotating shaft (408) passes through the middle of the bottom end of the inner wall of the water injection pipe (301) and is fixedly connected to the middle of the top end of the second driven bevel gear (403); the second driven bevel gear (403) is meshingly connected to the second transmission bevel gear (404); one end of the second rotating shaft (405) passes through the other side of the bottom end of the third tank body (401) and is fixedly connected to the middle of the second transmission bevel gear (404); the other end of the second rotating shaft (405) passes through one side of the bottom end of the second tank body (201) and is fixedly connected to the middle of the first driven bevel gear (407); the bottom end of the scraper (4012) is slidably connected to the bottom end of the filter screen (4013).

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