Power plant steam turbine drainage heat recovery device

Abstract

The invention relates to the field of heat recovery, in particular to a power plant steam turbine drainage heat recovery device which comprises a shell, a plurality of exhaust holes are formed in the side wall of the shell, a transmission shaft is rotatably connected to the interior of the shell in a penetrating mode, a rotating roller is fixedly connected to the side wall of the transmission shaft, and a plurality of impellers are fixedly connected to the side wall of the rotating roller at equal angles. An adjusting assembly is fixedly installed on the side wall of one side of the shell, an auxiliary assembly is fixedly installed on the side wall of the other side of the shell, and a conversion assembly is fixedly installed on the inner top wall of the shell. By arranging the adjusting assembly, after high-pressure steam is guided into the shell through the air inlet pipe, an electric push rod is started to drive a baffle to do reciprocating motion, the high-pressure steam is sprayed out through rectangular holes formed in the baffle and a plurality of adjacent first nozzles, and through reciprocating motion of the baffle, the steam is sprayed out through the first nozzles in different directions; high-temperature hot air cannot be excessively concentrated at the air inlet, and excessive concentration of heat is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat recovery, and in particular relates to a steam turbine drain heat recovery device for a power plant. Background Art

[0002] After the steam flows through the fixed nozzle, the pressure and temperature decrease, the volume expands, the flow rate increases, and the thermal energy is converted into kinetic energy. The high-speed steam is used to impact the moving blades installed on the impeller. The blades are forced to drive the rotor to rotate. After the steam flows out of the blades, the flow rate decreases, and the kinetic energy is converted into mechanical energy. Mechanical work is output to the outside through the turbine shaft, completing the conversion of kinetic energy to mechanical work, thereby realizing heat recovery.

[0003] For example, a heat recovery device for steam turbine drain in a thermal power plant proposed in announcement number CN219390659U includes a box body, a steam duct arranged on the top of the box body, a heat exchanger arranged obliquely in the box body, a heat conduction plate arranged obliquely below the heat exchanger, a water storage tank fixed to the bottom of the box body, and a water outlet hole opened at the bottom of the box body and connected to the water storage tank. The bottom of the steam duct is provided with two air ports connected to the interior of the box body; the two exhaust pipes are driven by a motor to rotate around the positioning shaft as the rotation center, thereby adjusting the blowing direction of the exhaust pipes, increasing the coverage area of ​​the blowing steam of the two exhaust pipes, and at the same time being beneficial to the dispersion of high-temperature steam, so that the high-temperature steam swings along the direction of the arc plate section, and under the action of inertia, the exhaust pipe can sweep toward the straight plate section, further improving the uniformity of steam in the box body, and solving the problem in the related technology that the hot steam blowing is fixed and the coverage area on the guide plate is small.

[0004] Currently, most steam turbines use fixed nozzles to introduce high-pressure steam into the turbine. This steam is then used to propel the turbine for heat recovery. However, the fixed position of the nozzles limits the coverage of the high-pressure steam, hindering steam dispersion. This results in excessive heat concentration, causing internal temperature expansion within the turbine and impacting the introduction of high-pressure steam. Furthermore, the high-temperature hot gas often contains dust. This dust is primarily fly ash particles formed by factors such as incomplete fuel combustion and volatilization condensation. This dust easily accumulates on the impeller surface during flue gas flow, forming an ash layer over time and placing a load on the impeller. Furthermore, during turbine operation, the introduction of high-pressure steam is often controlled by a steam inlet valve. Any malfunction in the steam inlet valve can affect the introduction of high-pressure steam and require manual inspection and repair. During this repair process, high-pressure steam cannot be introduced, impacting heat recovery and limiting the efficiency of heat recovery. Furthermore, as the high-pressure steam enters the turbine, driving the impeller to rotate and converting internal energy into mechanical energy, a significant amount of high-temperature heat remains unused within the casing, resulting in heat loss and impacting heat recovery efficiency.

[0005] Therefore, we proposed a power plant steam turbine drain heat recovery device to solve the above problems. Summary of the Invention

[0006] In view of the problems in the prior art that the coverage of high-pressure steam transmission is limited due to the fixed position of the existing nozzle, which is not conducive to the dispersion of steam and the excessive concentration of heat, resulting in temperature expansion inside the steam turbine and affecting the introduction of high-pressure steam; in addition, if the steam inlet valve has an abnormality, it will affect the introduction of high-pressure steam, and it is necessary to manually check the cause of the abnormality and perform maintenance. During the maintenance process, high-pressure steam cannot be introduced, affecting heat recovery. Moreover, a large amount of high temperature is stored in the shell of the steam turbine and is not utilized, resulting in heat energy loss, affecting the heat energy recovery rate. The purpose of the present invention is to provide a power plant steam turbine drain heat recovery device.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: A power plant steam turbine hydrophobic heat recovery device includes a shell, a plurality of exhaust holes are opened on the side wall of the shell, a transmission shaft is rotatably connected to the inside of the shell, a roller is fixedly connected to the side wall of the transmission shaft, and a plurality of impellers are fixedly connected to the side wall of the roller at equal angles, an adjustment component is fixedly installed on the side wall of one side of the shell, an auxiliary component is fixedly installed on the other side wall of the shell, and a conversion component is fixedly installed on the top wall inside the shell.

[0008] Furthermore, the adjustment component includes an intake pipe, which is fixedly connected to the side wall of the shell, a first steam intake valve is installed inside the intake pipe, one end of the intake pipe is fixedly connected to a first connecting seat, the side wall of the first connecting seat is fixedly connected to multiple groups of first nozzles at equal intervals, the side wall of the shell is fixedly connected to a bracket, the side wall of the bracket is fixedly connected to an electric push rod, and the movable end of the electric push rod passes through the bracket and the side wall of the shell in sequence and is fixedly connected to a baffle.

[0009] Furthermore, the baffle slides through the inside of the first connecting seat, a rectangular hole is opened on the side wall of the baffle, each of the impeller side walls is fixedly connected to a mounting plate, the mounting plate side wall is fixedly connected to an electromagnet, the mounting plate side wall is symmetrically fixedly connected to a first spring, the two first springs are commonly fixedly connected to a connecting plate, the connecting plate side wall is fixedly connected to a permanent magnet, the bottom end of the connecting plate is fixedly connected to a cleaning brush, and the cleaning brush is embedded in and slides on the impeller side wall.

[0010] Furthermore, the auxiliary component includes a diverter pipe, which is an L-shaped structure. The diverter pipe is fixedly connected to the side wall of the intake pipe, and a second steam intake valve is installed inside the diverter pipe. One end of the diverter pipe is fixedly connected to the side wall of the shell, and one end of the diverter pipe is fixedly connected to a second connecting seat, and the side wall of the second connecting seat is fixedly connected to multiple second nozzles. The side wall of the electric push rod is fixedly connected to a fixing plate, and the side wall of the fixing plate is symmetrically fixedly connected to connecting rods, and each of the connecting rods is curved.

[0011] Furthermore, the two connecting rods are commonly fixedly connected to a first piston plate, the side wall of the shell is fixedly connected to a first sealing cylinder, the first piston plate is sealingly and slidingly connected to the inner wall of the first sealing cylinder, the inner wall of the shell is fixedly connected to an exhaust pipe, a one-way air intake valve is installed inside the exhaust pipe, one end of the exhaust pipe is located inside the first sealing cylinder, and an air storage chamber is opened on the inner wall of the shell.

[0012] Furthermore, one end of the exhaust pipe is located inside the first sealing cylinder, an air storage cavity is opened on the inner wall of the shell, a connecting pipe is fixedly connected to the side wall of the first sealing cylinder, a one-way air outlet valve is installed inside the connecting pipe, one end of the connecting pipe is fixedly connected to the air storage cavity, and a plurality of second springs are fixedly connected to the inner wall of the air storage cavity at equal angles.

[0013] Furthermore, multiple second springs are solidly connected to a second piston plate, the second piston plate is sealed and slidably connected to the inner wall of the air storage chamber, the side wall of the shell is fixedly connected to an exhaust pipe, a one-way exhaust valve is installed inside the exhaust pipe, one end of the exhaust pipe is located inside the first sealing cylinder, and the other end of the exhaust pipe extends to the inside of the shell.

[0014] Furthermore, the conversion component includes a heat insulation plate, which is fixedly connected to the inner top wall of the shell, a bent rod is rotatably connected to the side wall of the shell, one end of the bent rod is fixedly connected to a flywheel, the side wall of the bent rod is fixedly connected to a first synchronous wheel, and the side wall of the transmission shaft is fixedly connected to a second synchronous wheel, and the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt.

[0015] Furthermore, a cavity is opened inside the heat insulation plate, the bottom wall of the cavity is symmetrically fixedly connected with a cold plate, the inner side wall of the cavity is fixedly connected with a heat conducting plate, the inside of the cavity is slidably connected with a heat insulating displacement plate, the bottom end of the heat insulating displacement plate is fixedly connected with a first push rod, one end of the first push rod is sealed and slidably connected to the bottom wall of the cavity, one end of the first push rod is rotatably connected to a first hinged rod, and the bottom wall of the cavity is fixedly connected with a second sealing cylinder.

[0016] Furthermore, the inner wall of the second sealing cylinder is sealingly and slidingly connected to a sealing plate, the bottom end of the sealing plate is fixedly connected to a second push rod, one end of the second push rod is rotatably connected to a second hinged rod, and one end of the first hinged rod and the second hinged rod are both rotatably connected to the side wall of the curved rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By setting an adjustment component, after high-pressure steam is introduced into the shell through the intake pipe, the electric push rod is started to drive the baffle to reciprocate, so that the high-pressure steam is ejected through the rectangular holes opened on the baffle and the adjacent multiple first nozzles. The baffle reciprocates to make the steam ejected through the first nozzles in different directions, so that the high-temperature hot air will not be excessively concentrated at the intake, thereby avoiding excessive heat concentration; during the rotation of the impeller, the electromagnet is energized to generate like magnetic poles between the electromagnet and the adjacent permanent magnets, and the magnetic repulsion generated by the like magnetic poles is used to push the connecting plate and the cleaning brush away, and the magnetism is weakened by changing the current of the electromagnet, so that under the elastic action of the first spring, the connecting plate and the cleaning brush are driven to reset, and the cleaning brush is used to reciprocate along the surface of the impeller, thereby continuously cleaning the dust on the surface of the impeller, avoiding the accumulation of dust on the surface of the impeller over time, which will form a dust layer and cause load on the impeller rotation; by setting an auxiliary component, if the first steam inlet valve is abnormal and the high-pressure main steam introduction operation cannot be continued, the first steam inlet valve is closed and the second steam inlet valve is started. The high-pressure steam is continuously introduced along the diverter pipe through the second connecting seat and the plurality of second nozzles. During the normal operation of the first steam inlet valve, the electric push rod reciprocates, driving the fixed plate to move synchronously. With the cooperation of the two connecting rods, the first piston plate reciprocates, and the pressure difference generated by the sealing sliding between the first piston plate and the first sealing cylinder is used to press the air inside the shell into the air storage chamber. When the air inside the air storage chamber reaches the upper limit, the one-way air outlet valve is closed and the one-way exhaust valve is opened, thereby discharging the drawn-in gas again along the exhaust pipe to assist in blowing the impeller. During the switching process between the first steam inlet valve and the start-up of the second steam inlet valve, the control valve in the auxiliary air duct is opened, and the elastic action of the second spring pushes the second piston plate to return, thereby discharging the air in the air storage chamber through the auxiliary air duct. The diameter of the auxiliary air duct is consistent with the diameter of the first nozzle, so that the flow rate is not reduced. By guiding the air in the air storage chamber along the auxiliary air duct for auxiliary injection, it is ensured that the power driving source of the impeller is not weakened, thereby improving the practicality of the device. By setting up a conversion component, after turning the flywheel, the heat conducting plate is used to conduct heat to the high temperature inside the shell, causing the air inside the cavity to expand due to the heat, pushing the adiabatic displacement plate downward. At this time, the sealing plate moves downward synchronously due to the pressure change. During the movement, the second push rod drives the curved rod to rotate, thereby realizing the conversion of thermal energy into mechanical energy. In this process, the air flows to the other end along the gap between the adiabatic displacement plates. When the heat of the air is transferred to the cold plate, the air cools and contracts, and the pressure decreases. Under the action of the external atmospheric pressure, the sealing plate moves upward. At this time, the gas volume reaches the minimum. Then, the air is reheated by the heat introduced by the heat conducting plate. This process is repeated continuously. With the rotational inertia of the flywheel, the adiabatic displacement plate is driven to move up and down reciprocatingly, thereby causing the flywheel and the curved rod to rotate continuously. During the rotation of the curved rod, it drives the first synchronous wheel to rotate synchronously. Under the action of the synchronous belt, the second synchronous wheel is rotated, thereby assisting in driving the transmission shaft and impeller to rotate, further converting heat into mechanical energy for use, and improving the efficiency of heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention in a rearward viewing direction; Figure 3 It is an overall cross-sectional view of the present invention; Figure 4 It is an overall cross-sectional view of the present invention in the rearward direction; Figure 5 Schematic diagram of the structure of the regulating component in the present invention; Figure 6 It is a partial structural diagram of the regulating component in the present invention; Figure 7 Schematic diagram of the structure of the impeller in the present invention; Figure 8 for Figure 7 A partial enlarged schematic diagram of part A; Figure 9 Schematic diagram of the structure of the auxiliary components in the present invention; Figure 10 It is a partial structural diagram of the auxiliary components in the present invention; Figure 11 Schematic diagram of the structure of the second piston plate in the present invention; Figure 12 Schematic diagram of the structure of the conversion component in the present invention; Figure 13 It is a cross-sectional view of the conversion component in the present invention.

[0019] In the figure: 1. Housing; 11. Exhaust hole; 12. Air storage chamber; 2. Drive shaft; 21. Roller; 22. Impeller; 3. Adjustment assembly; 31. Inlet pipe; 32. First steam inlet valve; 33. First connecting seat; 34. First nozzle; 35. Bracket; 36. Electric push rod; 37. Baffle; 38. Rectangular hole; 39. Mounting plate; 310. Electromagnet; 311. First spring; 312. Connecting plate; 313. Cleaning brush; 314. Permanent magnet; 4. Auxiliary assembly; 41. Diverter pipe; 42. Second steam inlet valve; 43. Second connecting seat; 44. Second nozzle; 45. Fixing plate; 46. Connecting rod; 47. First sealing cylinder; 48. First piston plate. 49. Exhaust pipe; 410. One-way air inlet valve; 411. Connecting pipe; 412. One-way air outlet valve; 413. Exhaust pipe; 414. One-way exhaust valve; 415. Second spring; 416. Second piston plate; 417. Auxiliary air guide pipe; 418. Control valve; 5. Conversion assembly; 51. Heat insulation plate; 52. Heat conduction plate; 53. Cavity; 54. Heat insulation displacement plate; 55. First push rod; 56. Second sealing cylinder; 57. Cold plate; 58. Sealing plate; 59. First hinged rod; 510. Second hinged rod; 511. Bending rod; 512. Flywheel; 513. First synchronous wheel; 514. Second synchronous wheel; 515. Synchronous belt; 516. Second push rod. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to specific embodiments.

[0021] To solve the problem that when the current steam turbine is in use, high-pressure steam is mostly introduced into the steam turbine through a fixed nozzle, and the introduced high-pressure steam is used to drive the steam turbine for heat recovery. However, in this process, due to the fixed position of the nozzle, the coverage of the high-pressure steam transmission is limited, which is not conducive to the dispersion of steam. The heat is too concentrated, causing the temperature inside the steam turbine to expand, affecting the introduction of high-pressure steam. At the same time, the high-temperature hot air usually contains dust. These dusts are mainly fly ash particles formed by factors such as incomplete fuel combustion and volatilization and condensation. These dusts are easy to accumulate on the surface of the impeller 22 during the flow of flue gas, forming an ash layer over time, which causes the problem of causing the impeller 22 to rotate with load, such as Figure 1 - Figure 8 As shown: A heat recovery device for steam turbine drain in a power plant includes a shell 1, which is characterized in that: a plurality of exhaust holes 11 are opened on the side wall of the shell 1, a transmission shaft 2 is rotatably connected to the inside of the shell 1, a roller 21 is fixedly connected to the side wall of the transmission shaft 2, and a plurality of impellers 22 are fixedly connected to the side wall of the roller 21 at equal angles, and an adjustment component 3 is fixedly installed on one side wall of the shell 1. By setting the adjustment component 3, after high-pressure steam is introduced into the interior of the shell 1 through the intake pipe 31, the electric push rod 36 is started to drive the baffle 37 to reciprocate, so that the high-pressure steam is ejected through the rectangular hole 38 opened on the baffle 37 and the adjacent plurality of first nozzles 34. The baffle 37 reciprocates, so that the steam is ejected through the first nozzles 34 in different directions, so that High-temperature hot air will not be excessively concentrated at the air intake, avoiding excessive heat concentration; during the rotation of the impeller 22, the electromagnet 310 is energized, so that like magnetic poles are generated between the electromagnet 310 and the adjacent permanent magnet 314, and the magnetic repulsion generated by the same magnetic poles is used to push the connecting plate 312 and the cleaning brush 313 away from each other, and the magnetism of the electromagnet 310 is weakened by changing the current size. Under the elastic action of the second spring 311, the connecting plate 312 and the cleaning brush 313 are driven to reset, and the cleaning brush 313 is used to reciprocate along the surface of the impeller 22, so as to continuously clean the dust on the surface of the impeller 22, avoiding accumulation on the surface of the impeller 22, and forming a dust layer over time, which causes a load on the rotation of the impeller 22.

[0022] An auxiliary component 4 is fixedly installed on the side wall of the other side of the shell 1. By setting up the auxiliary component 4, during the process of high-pressure steam introduction, if the first steam inlet valve 32 has an abnormality, the high-pressure main steam introduction operation cannot be continued, the first steam inlet valve 32 is closed, and the second steam inlet valve 42 is started, so that the high-pressure steam continues to be introduced along the diverter pipe 41 through the second connecting seat 43 and the multiple second nozzles 44, so as to avoid the abnormality of the steam inlet valve affecting the normal operation; during the normal operation of the first steam inlet valve 32, when the electric push rod 36 reciprocates, the fixed plate 45 is driven to move synchronously, and with the cooperation of the two connecting rods 46, the first piston plate 48 is made to reciprocate, and the pressure difference generated by the sealing sliding between the first piston plate 48 and the first sealing cylinder 47 is used to press the air inside the shell 1 into Inside the air storage chamber 12, when the gas inside the air storage chamber 12 reaches the upper limit, the one-way air outlet valve 412 is closed and the one-way exhaust valve 414 is opened, so that the drawn-in gas is discharged again along the exhaust pipe 414 to assist in blowing the impeller 22; in the process of switching between the first steam inlet valve 32 and starting the second steam inlet valve 42, the control valve 418 in the auxiliary air duct 417 is opened, and under the elastic action of the second spring 415, the second piston plate 416 is pushed to reset, so that the air in the air storage chamber 12 is discharged through the auxiliary air duct 417, and the diameter of the auxiliary air duct 417 is consistent with the diameter of the first nozzle 34, so that the flow rate will not be reduced. By leading the air in the air storage chamber 12 along the auxiliary air duct 417 for auxiliary injection, it is ensured that the power driving source of the impeller 22 will not be weakened, thereby improving the practicality of the device.

[0023] A conversion assembly 5 is fixedly installed on the top wall of the shell 1. By setting the conversion assembly 5, after turning the flywheel 512, the heat conducting plate 52 is used to conduct heat to the high temperature inside the shell 1, so that the air inside the cavity 53 expands due to the heat, pushing the heat-insulating displacement plate 54 to move downward. At this time, the sealing plate 58 moves downward synchronously due to the pressure change. During the movement, the second push rod 516 drives the bent rod 511 to rotate, thereby realizing the conversion of thermal energy into mechanical energy. In this process, the air flows to the other end along the gap between the heat-insulating displacement plates 54. When the heat of the air is transferred to the cold plate 57, the air cools and contracts, and the pressure decreases. Under the action of the external atmospheric pressure, the sealing plate 58 moves upward, and the gas volume reaches the maximum. The air is then reheated by the heat introduced by the heat conducting plate 52, and this process is repeated continuously. In conjunction with the rotational inertia of the flywheel 512, the heat-insulating displacement plate 54 is driven to move up and down, thereby causing the flywheel 512 and the bent rod 511 to rotate continuously. During the rotation, the bent rod 511 drives the first synchronous wheel 513 to rotate synchronously. Under the action of the synchronous belt 515, the second synchronous wheel 514 is rotated, thereby assisting in driving the transmission shaft 2 and the impeller 22 to rotate, further converting heat into mechanical energy for use, and improving the efficiency of heat recovery. The rotation speed of the second synchronous wheel 514 during the rotation process is greater than the rotation speed of the transmission shaft 2, thereby assisting in increasing the rotation speed of the transmission shaft 2.

[0024] The regulating assembly 3 includes an air intake pipe 31, which is fixedly connected to the side wall of the shell 1. A first steam intake valve 32 is installed inside the air intake pipe 31. One end of the air intake pipe 31 is fixedly connected to a first connecting seat 33. The side wall of the first connecting seat 33 is fixedly connected to multiple groups of first nozzles 34 at equal intervals. A bracket 35 is fixedly connected to the side wall of the shell 1. An electric push rod 36 is fixedly connected to the side wall of the bracket 35. The movable end of the electric push rod 36 passes through the bracket 35 and the side wall of the shell 1 in sequence and is fixedly connected to a baffle 37. The width of the baffle 37 is greater than the width of the first connecting seat 33, so that during the movement of the baffle 37, its two ends will not leave the inside of the first connecting seat 33.

[0025] The baffle 37 slides through the first connecting seat 33, and a rectangular hole 38 is opened on the side wall of the baffle 37. The width of the rectangular hole 38 is adapted to the diameter of the first nozzle 34. When the rectangular hole 38 moves from one group of first nozzles 34 to the adjacent first nozzle 34, no blockage will occur. Each impeller 22 side wall is fixedly connected to a mounting plate 39, and the side wall of the mounting plate 39 is fixedly connected to an electromagnet 310. The side wall of the mounting plate 39 is symmetrically fixedly connected to a first spring 311, and the two first springs 311 are jointly fixedly connected to a connecting plate 312. The side wall of the connecting plate 312 is fixedly connected to a permanent magnet 314, and the bottom end of the connecting plate 312 is fixedly connected to a cleaning brush 313. The cleaning brush 313 is embedded in and slides on the side wall of the impeller 22, wherein the mounting plate 39, the connecting plate 312 and the cleaning brush 313 are all made of lightweight materials.

[0026] In this solution, after high-pressure steam is introduced into the interior of the housing 1 through the air inlet pipe 31, the electric push rod 36 is started to drive the baffle 37 to reciprocate, so that the high-pressure steam is ejected through the rectangular holes 38 opened on the baffle 37 and the adjacent multiple first nozzles 34. The reciprocating movement of the baffle 37 causes the steam to be ejected through the first nozzles 34 in different directions. The orientation of each group of first nozzles 34 is at a certain angle, and the inclination angle does not cause the steam to not pass through the impeller 22. The diameter is smaller than the fixed nozzle in the prior art, so that the high-pressure steam has a wider spray range and a higher flow rate after passing through the first nozzles 34, making the steam more dispersed. Moreover, the steam is intermittently ejected in different directions through the multiple groups of first nozzles 34, and then rotated by the impeller 22, so that the high-temperature hot gas will not be excessively concentrated at the air inlet, thereby avoiding excessive heat concentration. During the rotation of the impeller 22, the electromagnet 310 is energized, so that like magnetic poles are generated between the electromagnet 310 and the adjacent permanent magnet 314. The magnetic repulsion generated by the like magnetic poles pushes the connecting plate 312 and the cleaning brush 313 away from each other, and the magnetism of the electromagnet 310 is weakened by changing the current size. As a result, under the elastic action of the first spring 311, the connecting plate 312 and the cleaning brush 313 are driven to reset. The cleaning brush 313 is used to reciprocate along the surface of the impeller 22, thereby continuously cleaning the dust on the surface of the impeller 22 to avoid accumulation on the surface of the impeller 22. Over time, a dust layer is formed, which causes a load on the rotation of the impeller 22.

[0027] In order to solve the problem that during the operation of the steam turbine, the entry of high-pressure steam is mostly controlled by the steam inlet valve. If the steam inlet valve is abnormal, it will affect the introduction of high-pressure steam, and it is necessary to manually check the cause of the abnormality and perform maintenance. During the maintenance process, the high-pressure steam cannot be introduced, affecting heat recovery. There are limitations, such as Figure 9 - Figure 11 As shown: The auxiliary component 4 includes a diverter pipe 41, which is an L-shaped structure. The diverter pipe 41 is fixedly connected to the side wall of the intake pipe 31. A second steam intake valve 42 is installed inside the diverter pipe 41. One end of the diverter pipe 41 is fixedly connected to the side wall of the shell 1. One end of the diverter pipe 41 is fixedly connected to a second connecting seat 43. The side wall of the second connecting seat 43 is fixedly connected to multiple second nozzles 44. The side wall of the electric push rod 36 is fixedly connected to a fixing plate 45. The side wall of the fixing plate 45 is symmetrically fixedly connected to connecting rods 46, and each connecting rod 46 is curved.

[0028] The two connecting rods 46 are fixedly connected to the first piston plate 48, the side wall of the shell 1 is fixedly connected to the first sealing cylinder 47, the first piston plate 48 is sealed and slidably connected to the inner wall of the first sealing cylinder 47, the inner wall of the shell 1 is fixedly connected to the exhaust pipe 49, a one-way air intake valve 410 is installed inside the exhaust pipe 49, one end of the exhaust pipe 49 is located inside the first sealing cylinder 47, and an air storage chamber 12 is opened on the inner wall of the shell 1.

[0029] One end of the exhaust pipe 49 is located inside the first sealing cylinder 47, and an air storage chamber 12 is opened on the inner wall of the shell 1. A connecting pipe 411 is fixedly connected to the side wall of the first sealing cylinder 47, and a one-way air outlet valve 412 is installed inside the connecting pipe 411. One end of the connecting pipe 411 is fixedly connected to the air storage chamber 12, and a plurality of second springs 415 are fixedly connected to the inner wall of the air storage chamber 12 at equal angles.

[0030] Multiple second springs 415 are solidly connected to a second piston plate 416, and the second piston plate 416 is sealed and slidably connected to the inner wall of the air storage chamber 12. The side wall of the shell 1 is fixedly connected to an exhaust pipe 413, and a one-way exhaust valve 414 is installed inside the exhaust pipe 413. One end of the exhaust pipe 413 is located inside the first sealing tube 47, and the other end of the exhaust pipe 413 extends to the inside of the shell 1.

[0031] In this solution: during the process of high-pressure steam introduction, if the first steam inlet valve 32 has an abnormality, the high-pressure main steam introduction operation cannot be continued, the first steam inlet valve 32 is closed, and the second steam inlet valve 42 is started, so that the high-pressure steam continues to be introduced along the diverter pipe 41 through the second connecting seat 43 and the plurality of second nozzles 44, to avoid the abnormality of the steam inlet valve affecting the normal operation; in the process of closing the first steam inlet valve 32 and opening the second steam inlet valve 42, the flow rate of the high-pressure steam will decrease, which will make the power driving source of the impeller 22 relatively weakened, affecting the power output. In order to avoid the power weakening of the impeller 22, during the normal operation of the first steam inlet valve 32, the electric push rod 36 reciprocates to drive the fixed plate 45 to move synchronously, and with the cooperation of the two connecting rods 46, the first piston plate 48 is made to reciprocate, and the first piston plate 48 and the first sealing cylinder 47 are used. The pressure difference generated by the sealed sliding between them, when the first piston plate 48 moves upward, the air inside the shell 1 is sucked into the first sealing cylinder 47 through the exhaust pipe 49, wherein the exhaust pipe 49 is equipped with a one-way air inlet valve 410, so that the gas inside the shell 1 can only enter the first sealing cylinder 47 along the exhaust pipe 49; when the first piston plate 48 moves downward, the air inside the first sealing cylinder 47 is pressed into the air storage chamber 12 through the connecting pipe 411. At this time, the second piston plate 416 compresses the second spring 415, wherein the connecting pipe 411 is equipped with a one-way air outlet valve 412, so that the gas in the first sealing cylinder 47 can only enter the air storage chamber 12 along the connecting pipe 411; when the gas inside the air storage chamber 12 reaches the upper limit, the one-way air outlet valve 412 is closed, and the one-way exhaust valve 414 is opened, so that the sucked gas is discharged along the exhaust pipe 414 again, thereby assisting the impeller 22 in blowing; During the process of switching between the first steam inlet valve 32 and starting the second steam inlet valve 42, the control valve 418 in the auxiliary air duct 417 is opened, and under the elastic action of the second spring 415, the second piston plate 416 is pushed to reset, so that the air in the air storage chamber 12 is discharged through the auxiliary air duct 417, and the diameter of the auxiliary air duct 417 is consistent with the diameter of the first nozzle 34, so that the flow rate will not be reduced. By guiding the air in the air storage chamber 12 along the auxiliary air duct 417 for auxiliary injection, it is ensured that the power driving source of the impeller 22 will not be weakened, thereby improving the practicality of the device.

[0032] In order to solve the problem that in the process of high-pressure steam intake turbine driving impeller 22 to rotate and converting internal energy into mechanical energy, a large amount of high temperature is still stored in the shell 1 and is not utilized, causing heat energy loss and affecting the heat energy recovery rate, as shown in the following figure: Figure 12 - Figure 13 As shown: The conversion assembly 5 includes a heat insulation plate 51, which is fixedly connected to the inner top wall of the shell 1. A bent rod 511 is rotatably connected to the side wall of the shell 1. One end of the bent rod 511 is fixedly connected to the flywheel 512. The side wall of the bent rod 511 is fixedly connected to the first synchronous wheel 513. The side wall of the transmission shaft 2 is fixedly connected to the second synchronous wheel 514. The first synchronous wheel 513 and the second synchronous wheel 514 are connected by a synchronous belt 515.

[0033] A cavity 53 is opened inside the heat insulation plate 51, and a cold plate 57 is symmetrically fixedly connected to the bottom wall of the cavity 53. A heat conducting plate 52 is fixedly connected through the inner side wall of the cavity 53. An insulating displacement plate 54 is slidably connected inside the cavity 53. A first push rod 55 is fixedly connected to the bottom end of the insulating displacement plate 54. One end of the first push rod 55 is sealed and slidably connected to the bottom wall of the cavity 53. One end of the first push rod 55 is rotatably connected to the first hinged rod 59. The bottom wall of the cavity 53 is fixedly connected to the second sealing cylinder 56.

[0034] The inner wall of the second sealing cylinder 56 is sealingly and slidingly connected to a sealing plate 58, the bottom end of the sealing plate 58 is fixedly connected to a second push rod 516, one end of the second push rod 516 is rotatably connected to the second hinged rod 510, and one end of the first hinged rod 59 and the second hinged rod 510 are both rotatably connected to the side wall of the bending rod 511.

[0035] In this solution, after the flywheel 512 is turned, the heat conducting plate 52 is used to conduct heat to the high temperature inside the shell 1, so that the air inside the cavity 53 is heated and expanded, pushing the heat-insulating displacement plate 54 downward. At this time, the sealing plate 58 moves downward synchronously due to the pressure change. During the movement, the second push rod 516 drives the bending rod 511 to rotate, thereby realizing the conversion of thermal energy into mechanical energy. In this process, the air flows to the other end along the gap between the heat-insulating displacement plates 54. When the heat of the air is transferred to the cold plate 57, the air cools and contracts, and the pressure decreases. Under the action of the external atmospheric pressure, the sealing plate 58 moves upward. At this time, the gas volume reaches the minimum, and then the heat conducting plate 52 is used. The introduced heat reheats the air, and this process is repeated continuously. In conjunction with the rotational inertia of the flywheel 512, it will drive the adiabatic replacement plate 54 to move up and down, thereby causing the flywheel 512 and the bent rod 511 to rotate continuously. During the rotation process, the bent rod 511 will drive the first synchronous wheel 513 to rotate synchronously. Under the action of the synchronous belt 515, the second synchronous wheel 514 is rotated, thereby assisting in driving the transmission shaft 2 and the impeller 22 to rotate, further converting heat into mechanical energy for use, and improving the heat recovery efficiency. The rotation speed of the second synchronous wheel 514 during the rotation process is greater than the rotation speed of the transmission shaft 2, thereby assisting in increasing the rotation speed of the transmission shaft 2.

[0036] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steam turbine drain heat recovery device for a power plant, comprising a housing (1), characterized in that: The side wall of the shell (1) is provided with a plurality of exhaust holes (11); a transmission shaft (2) is rotatably connected to the inside of the shell (1); a roller (21) is fixedly connected to the side wall of the transmission shaft (2); a plurality of impellers (22) are fixedly connected to the side wall of the roller (21) at equal angles; an adjustment component (3) is fixedly mounted on one side wall of the shell (1); an auxiliary component (4) is fixedly mounted on the other side wall of the shell (1); and a conversion component (5) is fixedly mounted on the top wall of the shell (1).

2. A power plant steam turbine drain heat recovery device according to claim 1, characterized in that: The regulating assembly (3) comprises an air intake pipe (31), the air intake pipe (31) being fixedly connected to a side wall of a housing (1), a first steam intake valve (32) being installed inside the air intake pipe (31), one end of the air intake pipe (31) being fixedly connected to a first connecting seat (33), a side wall of the first connecting seat (33) being fixedly connected to a plurality of first nozzles (34) at equal intervals, a bracket (35) being fixedly connected to the side wall of the housing (1), an electric push rod (36) being fixedly connected to the side wall of the bracket (35), a movable end of the electric push rod (36) being fixedly connected to a baffle (37) after passing through the bracket (35) and the side wall of the housing (1) in sequence.

3. A power plant steam turbine drain heat recovery device according to claim 2, characterized in that: The baffle (37) penetrates and slides inside the first connecting seat (33); a rectangular hole (38) is opened on the side wall of the baffle (37); a mounting plate (39) is fixedly connected to the side wall of each impeller (22); an electromagnet (310) is fixedly connected to the side wall of the mounting plate (39); first springs (311) are symmetrically fixedly connected to the side wall of the mounting plate (39); two first springs (311) are fixedly connected to a connecting plate (312) in common; a permanent magnet (314) is fixedly connected to the side wall of the connecting plate (312); a cleaning brush (313) is fixedly connected to the bottom end of the connecting plate (312); the cleaning brush (313) is embedded and slides on the side wall of the impeller (22).

4. A power plant steam turbine drain heat recovery device according to claim 2, characterized in that: The auxiliary component (4) comprises a flow divider (41), the flow divider (41) being an L-shaped structure, the flow divider (41) being fixedly connected to the side wall of the intake pipe (31), a second steam intake valve (42) being installed inside the flow divider (41), one end of the flow divider (41) being fixedly connected to the side wall of the housing (1), one end of the flow divider (41) being fixedly connected to a second connecting seat (43), a side wall of the second connecting seat (43) being fixedly connected to a plurality of second nozzles (44), a side wall of the electric push rod (36) being fixedly connected to a fixing plate (45), a side wall of the fixing plate (45) being symmetrically fixedly connected to connecting rods (46), each of the connecting rods (46) being curved.

5. A power plant steam turbine drain heat recovery device according to claim 4, characterized in that: The two connecting rods (46) are fixedly connected to a first piston plate (48), the side wall of the housing (1) is fixedly connected to a first sealing cylinder (47), the first piston plate (48) is sealingly and slidably connected to the inner wall of the first sealing cylinder (47), the inner wall of the housing (1) is fixedly connected to an exhaust pipe (49), a one-way air intake valve (410) is installed inside the exhaust pipe (49), one end of the exhaust pipe (49) is located inside the first sealing cylinder (47), and an air storage chamber (12) is opened on the inner wall of the housing (1).

6. A power plant steam turbine drain heat recovery device according to claim 5, characterized in that: The inner wall of the air storage chamber (12) is fixedly connected to an auxiliary air guide pipe (417), one end of the auxiliary air guide pipe (417) penetrates the side wall of the shell (1) and extends to the second connecting seat (43), a control valve (418) is installed inside the auxiliary air guide pipe (417), the side wall of the first sealing cylinder (47) is fixedly connected to a connecting pipe (411), a one-way air outlet valve (412) is installed inside the connecting pipe (411), one end of the connecting pipe (411) is fixedly connected to the air storage chamber (12), and a plurality of second springs (415) are fixedly connected at equal angles to the inner wall of the air storage chamber (12).

7. A power plant steam turbine drain heat recovery device according to claim 6, characterized in that: A plurality of the second springs (415) are solidly connected to a second piston plate (416), the second piston plate (416) is sealingly and slidably connected to the inner wall of the air storage chamber (12), the side wall of the shell (1) is fixedly connected to an exhaust pipe (413), a one-way exhaust valve (414) is installed inside the exhaust pipe (413), one end of the exhaust pipe (413) is located inside the first sealing cylinder (47), and the other end of the exhaust pipe (413) extends to the inside of the shell (1).

8. The power plant steam turbine drain heat recovery device according to claim 1, characterized in that: The conversion assembly (5) comprises a heat insulation plate (51), the heat insulation plate (51) being fixedly connected to the inner top wall of the shell (1), a bending rod (511) penetrating the side wall of the shell (1) and being rotatably connected thereto, one end of the bending rod (511) being fixedly connected to a flywheel (512), a first synchronous wheel (513) being fixedly connected to the side wall of the bending rod (511), a second synchronous wheel (514) being fixedly connected to the side wall of the transmission shaft (2), and the first synchronous wheel (513) and the second synchronous wheel (514) being connected via a synchronous belt (515).

9. A power plant steam turbine drain heat recovery device according to claim 8, characterized in that: A cavity (53) is provided inside the heat insulation plate (51), a heat conducting plate (52) is fixedly connected to the inner side wall of the cavity (53), a cold plate (57) is symmetrically fixedly connected to the inner bottom wall of the cavity (53), a heat insulating displacement plate (54) is slidably connected to the inside of the cavity (53), a first push rod (55) is fixedly connected to the bottom end of the heat insulating displacement plate (54), one end of the first push rod (55) is sealingly slidably connected to the inner bottom wall of the cavity (53), one end of the first push rod (55) is rotatably connected to the first hinge rod (59), and the inner bottom wall of the cavity (53) is fixedly connected to a second sealing cylinder (56).

10. A power plant steam turbine drain heat recovery device according to claim 9, characterized in that: The inner wall of the second sealing cylinder (56) is sealingly and slidably connected to a sealing plate (58); the bottom end of the sealing plate (58) is fixedly connected to a second push rod (516); one end of the second push rod (516) is rotatably connected to a second hinged rod (510); one end of each of the first hinged rod (59) and the second hinged rod (510) is rotatably connected to a side wall of the bending rod (511).

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