A waste heat recovery device for thermal power engineering of power plants

Abstract

The application relates to the technical field of power plant thermal engineering, and discloses a waste heat recovery device for power plant thermal energy power engineering, which comprises a base, a shell is fixedly arranged at the top of the base, a water storage tank is fixedly arranged on the inner wall of the bottom of the shell, the device increases the contact area between the heat in the waste gas and the water storage tank by making the waste gas disc pass through the outer wall of the water storage tank through a gas supply assembly, so that the heat recovery efficiency is improved, the heat in the waste gas is heated from the central position of the water storage tank by the fourth gas guide pipe, so that the heat utilization efficiency is further improved, the waste gas is transmitted to the outer wall of the U-shaped pipe through a preheating assembly, so that the waste heat in the waste gas heats the waste water in the U-shaped pipe, the waste water in the U-shaped pipe before entering the water storage tank is heated, the waste water is heated to a certain temperature and then enters the water storage tank to be heated and evaporated, and the heat in the waste gas is fully utilized through multi-stage use.

Description

Technical Field

[0001] This invention relates to the field of power plant thermal engineering technology, specifically to a waste heat recovery device for power plant thermal power engineering. Background Technology

[0002] In the thermal production of power plants, a large amount of waste gas containing heat is generated. This waste gas needs to be gradually cooled before it can be discharged into the atmosphere. This not only wastes heat, but also wastes other energy during the cooling process, which is obviously a serious waste of resources.

[0003] Application No. 202123072133.4 discloses a waste heat recovery device for power plant thermal power engineering, which describes its beneficial effects: through a thermal frame, the heat of the waste gas can be transferred to a water storage tank, and the power plant wastewater in the water storage tank is heated and distilled to separate water from other impurities. Through a guide block and a collection cup, the water can be recovered, which can improve the utilization rate of waste heat and filter wastewater. However, it can only transfer the heat of the waste gas to the wastewater through the bottom of the water tank, resulting in a small contact area between the heat in the waste gas and the wastewater. The heat in the waste gas cannot be fully utilized before being discharged, resulting in low waste heat recovery efficiency and certain defects. In order to solve the above problems, a waste heat recovery device for power plant thermal power engineering is proposed. Summary of the Invention

[0004] The present invention provides the following technical solution: a waste heat recovery device for power plant thermal power engineering, comprising a base, a shell fixedly provided on the top of the base, a water storage tank fixedly provided on the bottom inner wall of the shell, an air supply component extending to the right side of the outer wall of the shell on the left side of the outer wall of the shell, a water supply component extending into the water storage tank on the left side of the outer wall of the shell and above the air supply component, a preheating component extending to the outer wall of the water supply component on the back of the air supply component, a water guide block fixedly provided on the inner wall of the shell and above the water storage tank, an auxiliary component extending into the water guide block on the top of the water guide block, and a drainage component extending into the shell and at the bottom of the water guide block on the right side of the outer wall of the shell.

[0005] Preferably, the gas supply assembly includes a first gas guide pipe, a second gas guide pipe, a third gas guide pipe, a first coil, a fourth gas guide pipe, a fifth gas guide pipe, a sixth gas guide pipe, and a seventh gas guide pipe. The exhaust end of the first gas guide pipe is connected to the inlet end of the second gas guide pipe. The second gas guide pipe has two exhaust ends, which are respectively connected to the inlet ends of the third gas guide pipe and the first coil. The exhaust end of the third gas guide pipe is connected to the inlet end of the fourth gas guide pipe. The exhaust end of the fourth gas guide pipe is connected to the inlet end of the fifth gas guide pipe. The sixth gas guide pipe has two inlet ends, which are respectively connected to the exhaust ends of the fifth gas guide pipe and the first coil. The exhaust end of the sixth gas guide pipe is connected to the inlet end of the seventh gas guide pipe.

[0006] Preferably, the first coil is fixedly sleeved on the outer wall of the water storage tank, and the outer wall of the fourth air guide pipe is fixedly sleeved on the inner wall of the central axis of the water storage tank.

[0007] Preferably, the seventh air guide pipe has two exhaust ends. The air inlet end of the first air guide pipe and the right exhaust end of the seventh air guide pipe are respectively fixed with a first connector and a second connector. The top of the outer wall of the first air guide pipe and the seventh air guide pipe are respectively provided with a first electric valve and a second electric valve. The top of the outer wall of the second air guide pipe, located on the front and back of the first air guide pipe, are respectively provided with a third electric valve and a fourth electric valve. The first electric valve, the second electric valve, the third electric valve and the fourth electric valve are all connected to the controller through wires.

[0008] Preferably, the water supply assembly includes a first water guide pipe, a U-shaped pipe, and a second water guide pipe. The drain end of the first water guide pipe is connected to one end of the U-shaped pipe, and the other end of the U-shaped pipe is connected to the inlet end of the second water guide pipe. The drain end of the second water guide pipe extends through the shell into the water storage tank. A first connecting pipe is fixedly provided at the inlet end of the first water guide pipe. A mounting base is fixedly provided at the bottom of the U-shaped pipe, and the right side of the mounting base is fixedly connected to the left side of the outer wall of the shell.

[0009] Preferably, the preheating component includes an eighth air guide pipe and a second coil. The air inlet end of the eighth air guide pipe is connected to the exhaust end on the back of the seventh air guide pipe, and the exhaust end of the eighth air guide pipe is connected to the air inlet end of the second coil. The second coil is fixedly sleeved on the outer wall of the U-shaped tube. A fifth electric valve is provided on the top of the outer wall of the eighth air guide pipe, and the fifth electric valve is connected to the controller through a wire.

[0010] Preferably, the auxiliary components include an electric push rod, a through groove, a recess, a sponge ring, a rubber ring, and a rubber plate. The recess is formed on the top of the water guide block, the through groove is formed on the side wall of the water guide pipe, and the through groove and the recess are connected. The rubber plate is fitted inside the through groove. The side wall of the electric push rod is fixedly connected to the inner side wall of the housing. The output shaft of the electric push rod extends into the recess and is fixedly connected to the top of the rubber plate. The inner wall of the sponge ring is fitted inside the side wall of the water guide block. The two sides of the rubber plate are fixedly connected to the two sides of the inner wall of the sponge ring, respectively. The inner wall of the rubber ring is fixedly connected to the outer wall of the sponge ring.

[0011] Preferably, the electric push rod has a mounting ring fixedly fitted on its side wall, and a ring array of mounting rods is fixedly mounted on the outer wall of the mounting ring. The other end of each mounting rod is fixedly connected to the inner side wall of the housing. The electric push rod is connected to the controller via a wire.

[0012] Preferably, the drainage assembly includes a water storage hopper, a drain pipe, and a connector. The water storage hopper is located on the side closest to the water guide block and the water storage tank, and the central axis of the water storage hopper and the central axis of the water guide block are on the same vertical line. The inlet end of the drain pipe is connected to the drain end of the water storage hopper, and the drain end of the drain pipe extends to the outside of the shell. The two sides of the connector are fixedly connected to the right side of the outer wall of the water storage hopper and the right side of the inner wall of the shell, respectively. A second connecting pipe is fixedly provided at the drain end of the drain pipe.

[0013] Preferably, the top of the shell is designed to be open, and the outer wall of the water guide block is designed to be an inverted cone shape.

[0014] Compared with the prior art, the present invention provides a waste heat recovery device for power plant thermal power engineering, which has the following features:

[0015] Beneficial effects:

[0016] 1. The device increases the contact area between the heat in the waste gas and the water storage tank by passing the waste gas through the outer wall of the air supply component, thereby improving the heat recovery efficiency. Furthermore, by using the fourth air guide pipe to direct the waste gas through the center of the water storage tank, the heat in the waste gas is heated from the center of the waste water, further improving the heat utilization efficiency.

[0017] 2. The device uses a preheating component to transfer the exhaust gas to the outer wall of the U-shaped tube, thereby heating the wastewater in the U-shaped tube with the residual heat in the exhaust gas. This process heats the wastewater in the U-shaped tube before it enters the water storage tank, raising the wastewater to a certain temperature before it enters the water storage tank for further heating and evaporation. By using multiple stages to utilize the heat in the exhaust gas, the device ensures that the heat in the exhaust gas is fully utilized, thus ensuring full recovery of residual heat.

[0018] 3. The device uses auxiliary components to wipe and push the water droplets formed on the side wall of the water guide block, so that the water droplets can quickly enter the water storage tank. This avoids the formation of a large number of water droplets on the side wall of the water guide block, which would cause the water droplets to fall straight down. This ensures that most of the water droplets formed by steam enter the water storage tank, ensuring the water droplet collection efficiency, thereby heating and evaporating the power plant wastewater in the water storage tank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front view of a waste heat recovery device for power plant thermal power engineering according to the present invention.

[0020] Figure 2 This is a schematic diagram of the overall rear view structure of a waste heat recovery device for power plant thermal power engineering according to the present invention.

[0021] Figure 3 This is a schematic cross-sectional view of the shell structure of a waste heat recovery device for power plant thermal power engineering according to the present invention.

[0022] Figure 4 This is a cross-sectional view of the water storage tank of a waste heat recovery device for power plant thermal power engineering according to the present invention.

[0023] Figure 5 This is a cross-sectional view of the water guide block of a waste heat recovery device for power plant thermal power engineering according to the present invention.

[0024] Figure 6 This is a schematic diagram of the water guide block structure of a waste heat recovery device for power plant thermal power engineering according to the present invention.

[0025] In the picture:

[0026] 1. Base; 2. Housing; 3. Drainage assembly; 301. Drain pipe; 302. Connector; 303. Water storage tank; 4. Auxiliary assembly; 401. Electric push rod; 402. Rubber ring; 403. Rubber plate; 404. Through groove; 405. Groove; 406. Sponge ring; 5. Water guide block; 6. Preheating assembly; 601. Eighth air guide pipe; 602. Second coil; 7. Water supply assembly; 701. First water guide pipe; 702. U-shaped pipe; 703. Second water guide pipe; 8. Air supply assembly; 801. First air guide pipe; 802. Second air guide pipe; 803. Third air guide pipe; 804. First coil; 805. Fifth air guide pipe; 806. Sixth air guide pipe; 807. Seventh air guide pipe; 808. Fourth air guide pipe; 9. Mounting base; 10. Water storage tank; 11. Mounting ring; 12. Mounting rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1;

[0029] Please see Figure 1 and 2 A waste heat recovery device for power plant thermal power engineering includes a base 1, a housing 2 fixedly mounted on the top of the base 1, a water storage tank 10 fixedly mounted on the inner wall of the bottom of the housing 2, and an air supply component 8 extending to the right side of the outer wall of the housing 2. The air supply component 8 guides the waste gas through the outer wall of the water storage tank 10, increasing the contact area between the heat in the waste gas and the water storage tank 10, thereby improving the heat recovery efficiency. Furthermore, by using a fourth air guide pipe 808 to direct the waste gas flow through the center of the water storage tank 10, the heat in the waste gas is heated from the center of the waste water, further improving the heat utilization efficiency. A water supply component 7 extending into the water storage tank 10 is located on the left side of the outer wall of the housing 2 and above the air supply component 8. A preheating component 6 extending to the outer wall of the water supply component 7 is located on the back of the air supply component 8. The preheating component 6 transmits the waste gas through... The waste heat in the exhaust gas is supplied to the outer wall of the U-shaped tube 702, thereby heating the wastewater in the U-shaped tube 702 before it enters the water storage tank 10. The wastewater is heated to a certain temperature before entering the water storage tank 10 for heating and evaporation. Through multi-stage use, the heat in the exhaust gas is fully utilized, thus ensuring full recovery of waste heat. A water guide block 5 is fixedly provided on the inner wall of the shell 2 and at the top of the water storage tank 10. An auxiliary component 4 is provided on the top of the water guide block 5, extending into the water guide block 5. The auxiliary component 4 wipes and pushes the water droplets formed on the side wall of the water guide block 5, so that the water droplets quickly enter the water storage hopper 303, avoiding the formation of a large number of water droplets on the side wall of the water guide block 5, which would cause the water droplets to fall straight down. This ensures that most of the water droplets formed by the steam enter the water storage hopper 303, ensuring the water droplet collection efficiency. This allows the power plant wastewater in the water storage tank 10 to be heated and evaporated. A drainage component 3 is provided on the right side of the outer wall of the shell 2, extending into the shell 2 and located at the bottom of the water guide block 5.

[0030] Furthermore, the top of the shell 2 is designed to be open, and the outer wall of the water guide block 5 is designed to be an inverted cone shape to facilitate the flow of water droplets.

[0031] Example 2;

[0032] Please see Figure 3 and 4The air supply assembly 8 includes a first air duct 801, a second air duct 802, a third air duct 803, a first coil 804, a fourth air duct 808, a fifth air duct 805, a sixth air duct 806, and a seventh air duct 807. The exhaust end of the first air duct 801 is connected to the intake end of the second air duct 802. The second air duct 802 has two exhaust ends, which are respectively connected to the intake ends of the third air duct 803 and the first coil 804. The exhaust end of the third air duct 803 is connected to the first air duct 804. The air inlet of the fourth air pipe 808 is connected, the exhaust end of the fourth air pipe 808 is connected to the air inlet of the fifth air pipe 805, the sixth air pipe 806 has two air inlets, the exhaust end of the fifth air pipe 805 and the exhaust end of the first coil 804 are respectively connected to the two air inlets of the sixth air pipe 806, the exhaust end of the sixth air pipe 806 is connected to the air inlet of the seventh air pipe 807, the first coil 804 is fixedly sleeved on the outer wall of the water storage tank 10, and the outer wall of the fourth air pipe 808 is fixedly sleeved on the inner wall of the central axis of the water storage tank 10.

[0033] In specific implementation, the controller opens the first, third, and fourth electric valves, and connects the first connector to the exhaust pipe of the power plant's waste gas. This allows the waste gas generated by the power plant to enter the second exhaust pipe 802 through the first exhaust pipe 801, and then enter the third exhaust pipe 803 and the first coil 804 through the two exhaust ends of the second exhaust pipe 802, respectively. The waste gas then flows through the first coil 804 through the water storage tank 10 to the sixth exhaust pipe 806, and through the third exhaust pipe 803 to the fourth exhaust pipe 808. The waste water in the water storage tank 10 is heated from the center and outer wall of the water storage tank 10 through the fourth exhaust pipe 808 and the first coil 804. The waste water then flows through the fourth exhaust pipe 808 to the fifth exhaust pipe 805, and through the fifth exhaust pipe 805 to the sixth exhaust pipe 806.

[0034] Furthermore, the seventh air duct 807 is provided with two exhaust ends. The air inlet end of the first air duct 801 and the right exhaust end of the seventh air duct 807 are respectively fixed with a first connector and a second connector to facilitate connection to external power plant pipelines. The top of the outer wall of the first air duct 801 and the seventh air duct 807 are respectively provided with a first electric valve and a second electric valve. The top of the outer wall of the second air duct 802, located on the front and back of the first air duct 801, are respectively provided with a third electric valve and a fourth electric valve. The first electric valve, the second electric valve, the third electric valve and the fourth electric valve are all connected to the controller through wires to facilitate actual control. The first coil 804 and the fourth water duct are both made of heat-conducting material to facilitate heat transfer.

[0035] Example 3;

[0036] Please see Figure 2 and 3The water supply component 7 includes a first water guide pipe 701, a U-shaped pipe 702, and a second water guide pipe 703. The drain end of the first water guide pipe 701 is connected to one end of the U-shaped pipe 702, and the other end of the U-shaped pipe 702 is connected to the inlet end of the second water guide pipe 703. The drain end of the second water guide pipe 703 extends through the housing 2 into the water storage tank 10. A first connecting pipe is fixedly provided at the inlet end of the first water guide pipe 701. A mounting base 9 is fixedly provided at the bottom of the U-shaped pipe 702. The right side of the mounting base 9 is fixedly connected to the left side of the outer wall of the housing 2.

[0037] In practice, the first drain pipe 301 is connected to the power plant wastewater discharge pipeline, so that the wastewater is discharged into the water storage tank 10 through the first drain pipe 301, the U-shaped pipe 702 and the second drain pipe 301. The U-shaped pipe 702 helps to increase the contact area between the second coil 602 and the wastewater, thereby improving the heat recovery efficiency.

[0038] Example 4;

[0039] Please see Figure 1 and 2 The preheating component 6 includes an eighth air guide pipe 601 and a second coil 602. The air inlet end of the eighth air guide pipe 601 is connected to the exhaust end of the back of the seventh air guide pipe 807, and the exhaust end of the eighth air guide pipe 601 is connected to the air inlet end of the second coil 602. The second coil 602 is fixedly sleeved on the outer wall of the U-shaped tube 702. A fifth electric valve is provided on the top of the outer wall of the eighth air guide pipe 601. The fifth electric valve is connected to the controller through a wire.

[0040] In practice, the controller opens the fifth electric valve, allowing the exhaust gas to flow through the sixth air guide pipe 806 to the eighth air guide pipe 601, and then through the eighth air guide pipe 601 to the second coil 602. This allows the heat in the exhaust gas to heat the wastewater in the U-shaped pipe 702, preheating the wastewater before it flows into the water storage tank 10.

[0041] Example 5;

[0042] Please see Figure 3 , 56. Auxiliary component 4 includes an electric push rod 401, a through groove 404, a recess 405, a sponge ring 406, a rubber ring 402, and a rubber plate 403. The recess 405 is formed on the top of the water guide block 5, the through groove 404 is formed on the side wall of the water guide pipe, and the through groove 404 and the recess 405 are connected. The rubber plate 403 is fitted inside the through groove 404. The side wall of the electric push rod 401 is fixedly connected to the inner side wall of the housing 2. The output shaft of the electric push rod 401 extends into the recess 405. The output shaft of the electric push rod 401 is fixedly connected to the top of the rubber plate 403. The inner wall of the sponge ring 406 is fitted inside the side wall of the water guide block 5. The two sides of the rubber plate 403 are fixedly connected to the two sides of the inner wall of the sponge ring 406, respectively. The inner wall of the rubber ring 402 is fixedly connected to the outer wall of the sponge ring 406.

[0043] In practice, the controller starts the electric push rod 401. The output shaft of the electric push rod 401 drives the rubber plate 403 to move, and the rubber plate 403 drives the sponge ring 406 to move. This causes the sponge ring 406 to wipe and push the water droplets on the side wall of the water guide block 5, so that the water droplets enter the water storage tank 303. The rubber ring 402 elastically binds the sponge ring 406, so that the inner wall of the sponge ring 406 always fits against the side wall of the water guide block 5, which is convenient for wiping and pushing the water droplets. The rubber plate 403 has a certain degree of elasticity, which is convenient for elastically supporting and binding the rubber ring 402 and the sponge ring 406.

[0044] Furthermore, the side wall of the electric push rod 401 is fixedly fitted with a mounting ring 11, and the outer wall of the mounting ring 11 is fixedly fitted with mounting rods 12 arranged in a ring array. The other end of each mounting rod 12 is fixedly connected to the inner side wall of the housing 2. The electric push rod 401 is connected to the controller through a wire, which facilitates the fixed installation of the electric push rod 401.

[0045] Example 6;

[0046] Please see Figure 3 The drainage assembly 3 includes a water storage hopper 303, a drain pipe 301, and a connector 302. The water storage hopper 303 is located on the side closest to the water guide block 5 and the water storage tank 10, and the central axis of the water storage hopper 303 and the central axis of the water guide block 5 are on the same vertical line. The inlet end of the drain pipe 301 is connected to the drain end of the water storage hopper 303, and the drain end of the drain pipe 301 extends to the outside of the housing 2. The two sides of the connector 302 are fixedly connected to the right side of the outer wall of the water storage hopper 303 and the right side of the inner wall of the housing 2, respectively. A second connecting pipe is fixedly provided at the drain end of the drain pipe 301.

[0047] In practice, the water entering the water storage hopper 303 is discharged through the drain pipe 301. Due to the inclined design of the drain pipe 301, the water is easily discharged.

[0048] Working Principle: During operation, wastewater from the power plant is discharged into the storage tank 10 via the water supply assembly 7. The gas supply assembly 8 directs the wastewater containing a large amount of heat generated by the power plant through the outer and inner walls of the storage tank 10. This causes the heat in the wastewater to evaporate, and the evaporated water vapor forms droplets on the side wall of the water guide block 5. The condensed droplets drip through the water guide block 5 into the water storage hopper 303 of the drainage assembly 3, and are then discharged from the shell 2. This process recovers and utilizes the heat from the wastewater, saving resources. Furthermore, the gas supply assembly 8 directs the wastewater through the outer wall of the storage tank 10, increasing the contact area between the heat in the wastewater and the storage tank 10, thus improving heat recovery efficiency. Finally, the fourth gas guide pipe 808 directs the wastewater flow through the center of the storage tank 10, allowing the heat in the wastewater to enter from the center of the storage tank. The process involves heating to further improve heat utilization efficiency. After the exhaust gas flows through the water storage tank 10 via the gas supply component 8, the exhaust gas is transferred to the outer wall of the U-shaped tube 702 via the preheating component 6. This allows the residual heat in the exhaust gas to heat the wastewater in the U-shaped tube 702 before it enters the water storage tank 10. The wastewater is heated to a certain temperature before entering the water storage tank 10 for further heating and evaporation. This multi-stage use of heat from the exhaust gas ensures full utilization of the heat and efficient recovery of residual heat. Furthermore, the auxiliary component 4 wipes and pushes the water droplets formed on the side wall of the water guide block 5, allowing the water droplets to quickly enter the water storage hopper 303. This prevents a large number of water droplets from forming on the side wall of the water guide block 5 and causing them to fall directly down, ensuring that most of the water droplets formed by the steam enter the water storage hopper 303, thus ensuring efficient water droplet collection. This process heats and evaporates the power plant wastewater in the water storage tank 10.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for thermal power engineering of power plants, comprising a base (1), characterized in that: The top of the base (1) is fixedly provided with a shell (2), the inner wall of the bottom of the shell (2) is fixedly provided with a water storage tank (10), the outer wall left side of the shell (2) is provided with a gas supply assembly (8) extending to the outer wall right side of the shell (2), the outer wall left side of the shell (2) and located at the top of the gas supply assembly (8) is provided with a water supply assembly (7) extending into the water storage tank (10), the back of the gas supply assembly (8) is provided with a preheating assembly (6) extending to the outer wall of the water supply assembly (7), the inner wall side of the shell (2) and located at the top of the water storage tank (10) is fixedly provided with a water guide block (5), the top of the water guide block (5) is provided with an auxiliary assembly (4) extending into the water guide block (5), the outer wall right side of the shell (2) is provided with a drainage assembly (3) extending into the shell (2) and located at the bottom of the water guide block (5). The auxiliary assembly (4) includes an electric push rod (401), a through groove (404), a groove (405), a sponge ring (406), a rubber ring (402) and a rubber plate (403), the groove (405) is opened at the top of the water guide block (5), the through groove (404) is opened in the side wall of the water guide pipe, and the through groove (404) and the groove (405) are communicated, the rubber plate (403) is sleeved in the through groove (404), the side wall of the electric push rod (401) is fixedly connected with the inner side wall of the shell (2), the output shaft of the electric push rod (401) extends into the groove (405), the output shaft of the electric push rod (401) is fixedly connected with the top of the rubber plate (403), the inner wall of the sponge ring (406) is sleeved on the side wall of the water guide block (5), the two sides of the rubber plate (403) are fixedly connected with the inner walls of the sponge ring (406) respectively, and the inner wall of the rubber ring (402) is fixedly connected with the outer wall of the sponge ring (406).

2. A waste heat recovery device for thermal power engineering of power plants according to claim 1, characterized in that: The gas supply assembly (8) includes a first air guide pipe (801), a second air guide pipe (802), a third air guide pipe (803), a first coil pipe (804), a fourth air guide pipe (808), a fifth air guide pipe (805), a sixth air guide pipe (806) and a seventh air guide pipe (807), the exhaust end of the first air guide pipe (801) is connected with the air inlet end of the second air guide pipe (802), the second air guide pipe (802) is provided with two exhaust ends, the two exhaust ends of the second air guide pipe (802) are respectively connected with the air inlet end of the third air guide pipe (803) and the air inlet end of the first coil pipe (804), the exhaust end of the third air guide pipe (803) is connected with the air inlet end of the fourth air guide pipe (808), the exhaust end of the fourth air guide pipe (808) is connected with the air inlet end of the fifth air guide pipe (805), the sixth air guide pipe (806) is provided with two air inlet ends, the exhaust end of the fifth air guide pipe (805) and the exhaust end of the first coil pipe (804) are respectively connected with the two air inlet ends of the sixth air guide pipe (806), and the exhaust end of the sixth air guide pipe (806) is connected with the air inlet end of the seventh air guide pipe (807).

3. A waste heat recovery device for thermal power engineering of power plants according to claim 2, characterized in that: The first coil pipe (804) is fixedly sleeved on the outer wall of the water storage tank (10), and the outer wall of the fourth air guide pipe (808) is fixedly sleeved on the inner wall of the central shaft of the water storage tank (10).

4. The waste heat recovery device for thermal power engineering of power plants according to claim 2, characterized in that: The seventh air duct (807) is provided with two exhaust ends, the air inlet end of the first air duct (801) and the right exhaust end of the seventh air duct (807) are respectively provided with a first connector and a second connector, and the outer wall top of the first air duct (801) and the seventh air duct (807) is respectively provided with a first electric valve and a second electric valve.

5. The waste heat recovery device for thermal power engineering of power plants according to claim 1, characterized in that: The water supply assembly (7) comprises a first water duct (701), a U-shaped pipe (702) and a second water duct (703), the water outlet end of the first water duct (701) is connected with one end of the U-shaped pipe (702), the other end of the U-shaped pipe (702) is connected with the water inlet end of the second water duct (703), the water outlet end of the second water duct (703) extends through the shell (2) into the water storage tank (10), the water inlet end of the first water duct (701) is fixedly provided with a first connecting pipe, the bottom of the U-shaped pipe (702) is fixedly provided with a mounting seat (9), and the right side of the mounting seat (9) is fixedly connected with the left side of the outer wall of the shell (2).

6. The waste heat recovery device for thermal power engineering of power plants according to claim 1, characterized in that: The preheating assembly (6) comprises an eighth air duct (601) and a second coil pipe (602), the air inlet end of the eighth air duct (601) is connected with the back exhaust end of the seventh air duct (807), the air outlet end of the eighth air duct (601) is connected with the air inlet end of the second coil pipe (602), the second coil pipe (602) is fixedly sleeved on the outer wall of the U-shaped pipe (702), the outer wall top of the eighth air duct (601) is provided with a fifth electric valve, and the fifth electric valve is connected with the controller through a wire.

7. The waste heat recovery device for thermal power engineering of power plants according to claim 1, characterized in that: The side wall of the electric push rod (401) is fixedly sleeved with a mounting ring (11), the outer wall of the mounting ring (11) is fixedly provided with a plurality of mounting rods (12) arranged in an annular array, the other ends of the mounting rods (12) are fixedly connected with the inner side wall of the shell (2), and the electric push rod (401) is connected with the controller through a wire.

8. The waste heat recovery device for thermal power engineering of power plants according to claim 1, characterized in that: The drainage assembly (3) comprises a water storage hopper (303), a drain pipe (301) and a connecting piece (302), the water storage hopper (303) is located on the side close to the water guide block (5) and the water storage tank (10), the central axis of the water storage hopper (303) and the central axis of the water guide block (5) are on the same vertical line, the water inlet end of the drain pipe (301) is connected with the water outlet end of the water storage hopper (303), the water outlet end of the drain pipe (301) extends out of the shell (2), the connecting piece (302) is fixedly connected with the right side of the outer wall of the water storage hopper (303) and the right side of the inner wall of the shell (2), and the water outlet end of the drain pipe (301) is fixedly provided with a second connecting pipe.

9. The waste heat recovery device for thermal power engineering of power plants according to claim 1, characterized in that: The top of the shell (2) is designed in an open manner, and the outer wall of the water guide block (5) is designed in an inverted conical shape.

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