Steam turbine waste heat recovery system

Abstract

The invention discloses a steam turbine waste heat recovery system, and relates to the technical field of steam turbines, the steam turbine waste heat recovery system comprises a steam turbine body, one side of the steam turbine body is provided with an exhaust pipe used for exhausting, one side of the steam turbine body is provided with a treatment box, the exhaust pipe is communicated with the treatment box, and the bottom surface of the treatment box is fixedly provided with a collection box used for collecting water; through mutual cooperation of heat exchange coils, first electric push rods, first connecting rods, mounting shafts, baffles, temperature sensors, second connecting rods, third connecting rods, fourth connecting rods, fixing rods, sliding blocks, sliding rails, first pump bodies, a water outlet pipe, second pump bodies, a backflow pipe and a water tank, after each heat exchange coil absorbs heat of dead steam, the temperature sensor corresponding to the heat exchange coil can detect the temperature of the dead steam; and if the temperature of the dead steam is higher than the threshold value, the dead steam continues to make contact with the next heat exchange coil pipe, if the temperature of the dead steam is lower than the threshold value, the dead steam is discharged, contact between the dead steam and unnecessary heat exchange coil pipes is avoided, and the waste heat recovery efficiency of the dead steam is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbines, and specifically to a steam turbine waste heat recovery system. Background Art

[0002] A steam turbine is a mechanical device that uses the thermal energy of steam to drive a rotating shaft. It realizes the expansion and acceleration of steam through a series of blades, thereby converting the thermal energy of steam into mechanical energy. After high-temperature and high-pressure steam enters the steam turbine, it expands and accelerates in the nozzle to form a high-speed air flow. The high-speed steam impacts the moving blades, transferring kinetic energy to the moving blades. The moving blades drive the rotor to rotate, thereby converting the thermal energy of steam into mechanical energy. In order to improve the energy conversion efficiency, steam turbines are usually designed with a multi-stage structure, and steam expands gradually in multiple stages and does work stage by stage. As an important power device, steam turbines are widely used in the industrial and energy fields and are an indispensable part of modern industry.

[0003] After retrieval, it is found that there are problems in the waste heat recovery process of existing steam turbines. Since waste steam is generated during the use of steam turbines, there is waste heat in the waste steam that needs to be recovered. In the existing technology, waste heat is often recovered through multiple groups of heat exchange tubes. During this process, the initial temperature of the waste steam is relatively high. After the waste steam contacts the multiple groups of heat exchange tubes, both the temperature and pressure gradually decrease, resulting in less waste heat in the waste steam when it contacts the subsequent heat exchange tubes, which is not sufficient for recovery. Secondly, during the contact process between the waste steam and the heat exchange tubes, the temperature gradually decreases, but the water flow rate and water volume in the heat exchange tubes are fixed. The heat exchange tubes at the front position contact the waste steam with a relatively high temperature, making the water temperature in them relatively high, while the heat exchange tubes at the rear position contact the waste steam with a reduced temperature, making the water temperature in them relatively low. After the water in multiple groups of heat exchange tubes merges, the overall water temperature is low due to the low water temperature in some heat exchange tubes, affecting the overall waste heat recovery efficiency. Therefore, based on the above retrieval and in combination with the existing technology, a steam turbine waste heat recovery system is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a steam turbine waste heat recovery system, which has the advantages of good waste heat recovery effect and high efficiency, so as to solve the problem that the heat attenuation of waste steam is insufficient for recovery after contacting multiple groups of heat exchange tubes as mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A steam turbine waste heat recovery system includes: a steam turbine body, on one side of the steam turbine body, an exhaust pipe for exhausting gas is installed, on one side of the steam turbine body, a treatment box is provided, the exhaust pipe is communicated with the treatment box, and a collection box for collecting water is fixedly installed on the bottom surface of the treatment box; a stainless steel filter screen is slidably connected inside the treatment box; a waste heat recovery mechanism is arranged on one side of the collection box for recovering waste heat; the waste heat recovery mechanism includes a water tank fixedly installed on one side of the treatment box, several mounting plates are fixedly installed inside the treatment box, and a heat exchange coil for heat exchange is installed between every two mounting plates. The diameters of the multiple heat exchange coils decrease from left to right. The change in diameter changes the water flow rate in the heat exchange coil to cooperate with the attenuation of the waste steam heat and pressure. The heat exchange coil is circulated with the water tank through a pipeline. Several shielding frames are fixedly installed inside the treatment box, a communication pipe is fixedly installed on one side of the shielding frame, and two baffles that open and close according to the waste steam temperature are arranged on one side of the communication pipe.

[0007] Further, a water outlet pipe is communicated with the heat exchange coil, several pump bodies one are fixedly installed on the bottom surface of the water tank, the water outlet pipe is communicated with the pump bodies one, a return pipe is communicated with the heat exchange coil, several pump bodies two are fixedly installed on the bottom surface of the water tank, the return pipe is communicated with the pump bodies two, a support plate is fixedly installed on one side of the shielding frame, a carrier frame one is fixedly installed on one side of the support plate, a mounting shaft is fixedly installed on the top surface of the baffle on the right side, one end of the mounting shaft penetrates through the carrier frame one and is fixedly installed with a connecting rod one, a connecting frame is rotatably connected to the connecting rod one, an electric push rod one for driving the connecting frame to move is installed on the top surface of the support plate, a connecting rod three is rotatably connected to the top surfaces of the two baffles, a connecting rod two is rotatably connected to the top surface of the connecting rod three, one end of the connecting rod two is rotatably connected to the top surface of the carrier frame one, fixing rods are obliquely installed on the bottom surfaces of the two baffles, a connecting rod four is connected to the bottom surfaces of the two fixing rods, a slide rail is installed on one side of the communication pipe, a slider is slidably connected inside the slide rail, the baffle on the left side is rotatably connected to the slider, a temperature sensor for measuring the waste steam temperature is fixedly installed on one side of the baffle on the left side, and several exhaust valves for exhausting gas are fixedly installed on the top surface of the treatment box.

[0008] Further, mounting grooves are formed on both sides of every two baffles close to each other, and a half gear is fixedly installed inside the mounting groove. The two half gears are meshed and connected.

[0009] Further, a solenoid valve is fixedly installed on one side of the heat exchange coil, the solenoid valve is communicated with the heat exchange coil, a water inlet pipe for water inlet is fixedly sleeved on the inner circular wall surface of the solenoid valve, and a flange is fixedly sleeved on one end of the water inlet pipe.

[0010] Further, a connection hole is provided on the top surface of the treatment box, and the stainless steel filter screen is slidably connected to the connection hole. Two fixing blocks are fixedly installed on both sides inside the treatment box. A support box is rotatably connected between the two fixing blocks. A plurality of spray heads are fixedly installed on one side of the support box. A hose is fixedly installed on one side of the support box. A defective gear is fixedly installed on one side of the support box. A sector gear is rotatably connected to the inner top surface of the treatment box. The sector gear is meshed with the defective gear. A connection frame is fixedly installed on one side of the sector gear. A sliding frame is slidably connected to the two connection frames. A positioning block is fixedly installed on the inner top surface of the treatment box. An electric push rod II for driving the sliding frame to move is installed on one side of the positioning block.

[0011] Further, a water pump is fixedly installed on one side of the water tank. A water delivery pipe is fixedly sleeved on the inner circular wall surface of the water outlet hole of the water pump. An electronic thermometer for measuring temperature is fixedly installed on one side of the water tank.

[0012] Further, a collection box is fixedly installed on the bottom surface of the treatment box. A PTFE microporous filter membrane is fixedly sleeved inside the collection box. A drain valve for draining water is fixedly installed on one side of the collection box.

[0013] Further, two support frames are fixedly installed on the bottom surface of the treatment box. Two support holes are provided on the top surface of the support frames. The treatment box can be fixed on the ground by the cooperation of bolts and the support holes. Two threaded columns penetrate through both sides of the treatment box. One end of the threaded column is threadedly connected to one side of the stainless steel filter screen.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By the mutual cooperation of the steam turbine body, the exhaust pipe, the heat exchange coil and the treatment box, the waste heat can be recovered by using the heat exchange coil. Through the mutual cooperation of the heat exchange coil, the electric push rod I, the connecting rod I, the mounting shaft, the baffle, the temperature sensor, the connecting rod II, the connecting rod III, the connecting rod IV, the fixed rod, the slider, the slide rail, the pump body I, the water outlet pipe, the pump body II, the return pipe and the water tank, after each heat exchange coil absorbs the heat of the exhaust steam, the corresponding temperature sensor will detect the temperature of the exhaust steam. If the temperature of the exhaust steam is higher than the threshold value, it will continue to contact the next group of heat exchange coils. If the temperature of the exhaust steam is lower than the threshold value, it will be discharged, avoiding the contact of the exhaust steam with unnecessary heat exchange coils, improving the waste heat recovery efficiency of the exhaust steam, and realizing the circulation with the water in the water tank at the same time;

[0016] The diameters of multiple heat exchange coils gradually decrease. By varying the diameters of the heat exchange coils, the contact time between the exhaust steam and the water flow in each group of heat exchange coils is made inconsistent, enabling the flexible utilization of the heat exchange coils and water at different flow rates to recover the waste heat of the exhaust steam, further improving the waste heat recovery efficiency and achieving the waste heat recovery effect of the exhaust steam. Description of the Drawings

[0017] Figure 1 Schematic three-dimensional structure diagram of the present invention;

[0018] Figure 2 Schematic connection structure diagram of the treatment tank and the water tank of the present invention;

[0019] Figure 3 Schematic connection structure diagram of the water inlet pipe and the heat exchange coils of the present invention;

[0020] Figure 4 For Figure 3 Partial enlarged structure diagram of A in

[0021] Figure 5 Schematic bottom view of the connection structure of the communicating pipe and the baffle of the present invention;

[0022] Figure 6 For Figure 5 Partial enlarged structure diagram of B in

[0023] Figure 7 Schematic connection structure diagram of the stainless steel filter screen and the connection holes of the present invention;

[0024] Figure 8 For Figure 7 Partial enlarged structure diagram of C in

[0025] Figure 9 Schematic pipeline structure diagram between the heat exchange coils and the water tank of the present invention;

[0026] Figure 10 Schematic structure diagram of the collection box of the present invention.

[0027] In the figure: 1. Steam turbine body; 2. Exhaust pipe; 3. Treatment box; 4. Collection box; 5. Support frame; 6. Support hole; 7. Waste heat recovery mechanism; 8. Mounting plate; 9. Heat exchange coil; 10. Exhaust valve; 11. Shielding frame; 12. Water tank; 13. Water pump; 14. Water delivery pipe; 15. Drain valve; 16. PTFE microporous filter membrane; 17. Solenoid valve; 18. Water inlet pipe; 19. Connecting pipe; 20. Baffle; 21. Support plate; 22. Slide rail; 23. Slide block; 24. Electric push rod 1; 25. Connecting frame; 26. Link 1; 27. Carrier frame 1; 28. Mounting shaft; 29. Link 2; 30. Link 3; 31. Mounting groove; 32. Half gear; 33. Temperature sensor; 34. Carrier frame 2; 35. Fixed rod; 36. Link 4; 37. Threaded column; 38. Fixed block; 39. Hose; 40. Support box; 41. Stainless steel filter screen; 42. Connecting hole; 43. Sector gear; 44. Positioning block; 45. Electric push rod 2; 46. Sliding frame; 47. Missing gear; 48. Sprayer; 49. Connecting frame; 50. Electronic thermometer; 51. Pump body 1; 52. Water outlet pipe; 53. Pump body 2; 54. Return pipe. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In a typical implementation mode of this application, please refer to Figures 1 to 10 , a steam turbine waste heat recovery system includes a steam turbine body 1. An exhaust pipe 2 for exhausting gas is installed on one side of the steam turbine body 1. A treatment box 3 is arranged on one side of the steam turbine body 1. One end of the exhaust pipe 2 penetrates through the treatment box 3 and extends into the interior of the treatment box 3. A collection box 4 for collecting water is fixedly installed on the bottom surface of the treatment box 3. A stainless steel filter screen 41 is slidably connected inside the treatment box 3 for filtering exhaust steam. A waste heat recovery mechanism 7 is arranged on one side of the collection box 4 for recovering waste heat;

[0030] The waste heat recovery mechanism 7 includes a water tank 12. The water tank 12 is fixedly installed on one side of the treatment tank 3 through reinforcing ribs. A number of mounting plates 8 are fixedly installed inside the treatment tank 3. A heat exchange coil 9 for heat exchange is installed between every two mounting plates 8. The diameters of the multiple heat exchange coils 9 decrease from left to right. Under the condition of the same water volume, the smaller the diameter and the faster the internal flow rate. The heat exchange coil 9 is circulated with the water tank 12 through a pipeline. A number of shielding frames 11 are fixedly installed inside the treatment tank 3. A communicating pipe 19 is fixedly installed on one side of the shielding frame 11. Each shielding frame 11 and the communicating pipe 19 form a group. Each group of shielding frames 11 and communicating pipes 19 corresponds to each group of heat exchange coils 9. Two baffles 20 that open and close according to the temperature of the exhaust steam are arranged on one side of the communicating pipe 19.

[0031] A water outlet pipe 52 is connected to the heat exchange coil 9. One end of the water outlet pipe 52 penetrates through the right mounting plate 8 and the treatment tank 3 and extends to the outside of the treatment tank 3. A number of pump bodies one 51 are fixedly installed on the bottom surface of the water tank 12. One end of the water outlet pipe 52 is fixedly sleeved with the water inlet hole of the pump body one 51.

[0032] A return pipe 54 is connected to the heat exchange coil 9. One end of the return pipe 54 penetrates through the right mounting plate 8 and the treatment tank 3 and extends to the outside of the treatment tank 3. A number of pump bodies two 53 are fixedly installed on the bottom surface of the water tank 12. One end of the return pipe 54 is fixedly sleeved with the water inlet hole of the pump body two 53;

[0033] Among them, the water inside the heat exchange coil 9 absorbs the heat in the exhaust steam and heats up. The water in the multiple heat exchange coils 9 enters the inside of the water tank 12 through the pump body one 51 and the water outlet pipe 52, which makes the water inside the water tank 12 heat up. And the water inside the water tank 12 also enters the inside of the heat exchange coil 9 through the pump body two 53 and the return pipe 54 for circulation, making the water inside the water tank 12 continuously heat up;

[0034] One side of the shielding frame 11 is fixedly installed with a support plate 21. One side of the support plate 21 is fixedly installed with a first carrier 27. The top surface of the right baffle 20 is fixedly installed with a mounting shaft 28. One end of the mounting shaft 28 penetrates through the first carrier 27 and is fixedly installed with a first connecting rod 26. A connecting frame 25 is rotatably connected to the first connecting rod 26 through a rotating shaft. One side of the support plate 21 is installed with a first electric push rod 24 for driving the connecting frame 25 to move. The telescopic shaft of the first electric push rod 24 is fixedly connected to one side of the connecting frame 25. The top surfaces of the two baffles 20 are rotatably connected through a rotating shaft to a third connecting rod 30. The top surface of the third connecting rod 30 is rotatably connected through a rotating shaft to a second connecting rod 29. One end of the second connecting rod 29 is rotatably connected to the top surface of the first carrier 27 through a rotating shaft. Fixed rods 35 are inclinedly installed on the bottom surfaces of the two baffles 20. The bottom surfaces of the two fixed rods 35 are connected through a rotating shaft to a fourth connecting rod 36. One side of the communicating pipe 19 is installed with a slide rail 22. A slider 23 is slidably connected inside the slide rail 22. Both the slide rail 22 and the slider 23 are of T-shaped structure with high stability. The left baffle 20 is rotatably connected to the slider 23 through a bearing. One side of the left baffle 20 is fixedly installed with a temperature sensor 33 for measuring the temperature of the exhausted steam. The top surface of the processing box 3 is fixedly installed with a plurality of exhaust valves 10 for exhausting steam. The exhaust valves 10 correspond to the heat exchange coils 9. One side of the support plate 21 is fixedly installed with a second carrier 34. The bottom surface of the right baffle 20 is rotatably connected to the second carrier 34 through a rotating shaft. The second carrier 34 can support the baffle 20;

[0035] One side of the processing box 3 is fixedly installed with a PLC controller. The first electric push rod 24, the temperature sensor 33 and the exhaust valves 10 are all electrically connected to the PLC controller;

[0036] Among them, the staff sets a minimum temperature threshold for the exhausted steam. The exhausted steam enters the interior of the processing box 3 and first contacts the first heat exchange coil 9. The water inside the heat exchange coil 9 absorbs the waste heat in the exhausted steam. The exhausted steam continues to move to the right and contacts the two baffles 20 corresponding to the first heat exchange coil 9. The temperature sensor 33 can measure the temperature of the exhausted steam. If the temperature of the exhausted steam is higher than the threshold, the first electric push rod 24 drives the first connecting rod 26 to rotate. The rotation of the first connecting rod 26 drives the right baffle 20 to rotate towards the support plate 21. The rotation of the right baffle 20 drives the cooperation of the second connecting rod 29, the third connecting rod 30, the fixed rod 35 and the fourth connecting rod 36 to make the left baffle 20 rotate and close with the right baffle 20. At this time, the exhausted steam continues to move to the right and contacts the next group of heat exchange coils 9 until the temperature of the exhausted steam is lower than the minimum temperature threshold, so as to recover the waste heat in the exhausted steam;

[0037] In addition, the diameters of the multiple heat exchange coils 9 gradually increase from left to right. With a constant water volume per unit time, the water flow velocity in the leftmost heat exchange coil 9 is the fastest, and then gradually decreases. Since the temperature and pressure of the exhausted steam gradually decrease after passing through the multiple heat exchange coils 9, and the temperature of the exhausted steam is relatively high initially, the water in the first heat exchange coil 9 does not need to be in contact with the exhausted steam for a long time. However, for the subsequent heat exchange coils 9, the contact time with the exhausted steam needs to be gradually increased to ensure that the water in them is heated to an appropriate temperature.

[0038] With the above technical features, by providing the steam turbine body 1, exhausted steam is generated when the steam turbine body 1 is operating. The exhausted steam enters the interior of the treatment tank 3 through the exhaust pipe 2. There are multiple groups of heat exchange coils 9 inside the treatment tank 3, which are named the first heat exchange coil 9, the second heat exchange coil 9, the third heat exchange coil 9, the fourth heat exchange coil 9, and the fifth heat exchange coil 9 from left to right.

[0039] After the exhausted steam enters the interior of the treatment tank 3, it first comes into contact with the first heat exchange coil 9. The water inside the heat exchange coil 9 absorbs the heat in the exhausted steam, which causes the temperature of the water in the heat exchange coil 9 to rise, while the exhausted steam has its temperature decreased and pressure reduced. The exhausted steam continues to move to the right and contacts the two baffles 20 corresponding to the first heat exchange coil 9. The staff sets a minimum temperature threshold for the temperature sensor 33 on the baffle 20 through the PLC. The temperature sensor 33 on the baffle 20 corresponding to the first heat exchange coil 9 can measure the temperature of the exhausted steam.

[0040] When the temperature of the exhausted steam is higher than the minimum temperature threshold, the PLC controller activates the first electric push rod 24. The telescopic shaft of the first electric push rod 24 moves outwards, driving the first connecting rod 26 to rotate leftward. The first connecting rod 26 rotating leftward drives the mounting shaft 28 to rotate. The mounting shaft 28 rotating drives the right baffle 20 to rotate inwards. The right baffle 20 rotating inwards rotates towards the support plate 21. The rotation of the right baffle 20 also causes the second connecting rod 29 to rotate rightward. The second connecting rod 29 rotating rightward drives the third connecting rod 30 to rotate rightward. The third connecting rod 30 rotating rightward drives the left baffle 20 to rotate inwards until it fits against one side of the right baffle 20, and at the same time causes the fourth connecting rod 36 to rotate around the fixed rod 35 at the bottom of the two baffles 20. The left baffle 20 rotating inwards until it fits against one side of the right baffle 20 also causes the left baffle 20 to drive the slider 23 to slide inside the slide rail 22. The cooperation of the slide rail 22 and the slider 23 can restrict the rotation of the left baffle 20. After the two baffles 20 rotate and close on one side of the support plate 21, the exhausted steam continues to move to the right and contacts the second heat exchange coil 9.

[0041] Subsequently, the water in the second heat exchange coil 9 will absorb the heat in the exhausted steam again. After the temperature of the exhausted steam is measured by the temperature sensor 33 on the baffle 20 corresponding to the second heat exchange coil 9, if the temperature of the exhausted steam is still higher than the minimum temperature threshold, the two baffles 20 corresponding to the second heat exchange coil 9 will close on one side of the support plate 21, and the exhausted steam will continue to move forward to contact the third heat exchange coil 9, and so on. The exhausted steam will sequentially contact multiple heat exchange coils 9 inside the treatment tank 3 until, after the exhausted steam contacts a certain heat exchange coil 9, the temperature sensor 33 on the baffle 20 corresponding to the heat exchange coil 9 detects that the temperature of the exhausted steam is lower than the threshold. At this time, the exhaust valve 10 corresponding to this heat exchange coil 9 is opened, so that the exhausted steam is discharged through the exhaust valve 10. At this time, the heat of the exhausted steam is relatively low and does not meet the conditions for waste heat recovery, maximizing the utilization of the waste heat of the exhausted steam;

[0042] Meanwhile, the water inside the heat exchange coil 9 in contact with the exhausted steam will absorb the heat in the exhausted steam and increase in temperature. The water in the heat exchange coil 9 enters the inside of the water tank 12 through the water outlet pipe 52 under the action of the first pump 51 to exchange heat with the water inside the water tank 12, and the water inside the water tank 12 also returns to the inside of the heat exchange coil 9 through the return pipe 54 under the action of the second pump 53 for circulation, so that the water inside the water tank 12 is continuously heated. After the water temperature inside the water tank 12 rises to an appropriate temperature, it will enter the inside of the boiler, thereby using the waste heat of the exhausted steam of the steam turbine body 1 to preheat the water entering the boiler, enabling the boiler to quickly boil the water to form high-temperature steam to push the steam turbine body 1 and even the generator again;

[0043] On the other hand, the pipe diameters of the first heat exchange coil 9 to the fifth heat exchange coil 9 gradually increase. The amount of water per unit time in each heat exchange coil 9 is fixed, and the smaller the pipe diameter, the faster the water flow rate. The temperature of the exhausted steam is the highest when it contacts the first heat exchange coil 9. Therefore, the water in the first heat exchange coil 9 can be heated to an appropriate temperature without contacting the exhausted steam for a long time. During the process of the exhausted steam contacting the remaining heat exchange coils 9, the temperature gradually decreases, and the water flow rate in the corresponding subsequent heat exchange coils 9 also becomes slower and slower. This makes the contact time between the subsequent heat exchange coils 9 and the exhausted steam gradually increase and can also heat the water in the subsequent heat exchange coils 9 to an appropriate temperature until the waste heat in the exhausted steam is completely recovered, further improving the waste heat recovery efficiency;

[0044] During this process, the waste heat in the exhaust steam is recovered through the heat exchange coil 9. After each heat exchange coil 9 absorbs the heat of the exhaust steam, the corresponding temperature sensor 33 will detect the temperature of the exhaust steam. If the temperature of the exhaust steam is higher than the threshold value, it will continue to contact the next group of heat exchange coils 9. If the temperature of the exhaust steam is lower than the threshold value, it will be discharged, avoiding the contact of the exhaust steam with unnecessary heat exchange coils 9 and improving the waste heat recovery efficiency of the exhaust steam. On the other hand, by changing the diameter of the heat exchange coil 9, the contact time between the exhaust steam and the water flow in each group of heat exchange coils 9 is inconsistent, flexibly using the heat exchange coil 9 and water with different flow rates to recover the waste heat of the exhaust steam, further improving the waste heat recovery efficiency, achieving the waste heat recovery effect of the exhaust steam, helping to use the waste heat of the exhaust steam to heat the water entering the boiler, enabling the water in the boiler to become high-temperature steam faster to drive the steam turbine body 1, forming a reasonable heat cycle process, reducing energy loss, and facilitating the use of the steam turbine body 1 to drive the generator to generate electricity.

[0045] Installation grooves 31 are formed on both sides of every two baffles 20 close to each other. A semi-gear 32 is fixedly installed inside the installation groove 31. The two semi-gears 32 are meshed and connected, and the rotation of the two baffles 20 causes the semi-gears 32 on the two to mesh and rotate with each other.

[0046] Specifically, through the provided baffles 20, when the two baffles 20 rotate and close together towards one side of the support plate 21, the semi-gears 32 between the two baffles 20 mesh with each other, improving the smoothness of the rotation of the two baffles 20.

[0047] An electromagnetic valve 17 is fixedly installed on one side of the heat exchange coil 9. The electromagnetic valve 17 is communicated with the heat exchange coil 9. The electromagnetic valve 17 is electrically connected to the PLC controller. A water inlet pipe 18 for water inlet is fixedly sleeved on the inner wall surface of the inner circle of the electromagnetic valve 17. The electromagnetic valve 17 can control the water inlet of the heat exchange coil 9. One end of the water inlet pipe 18 is fixedly sleeved with a flange, and the external pipeline can be connected to the water inlet pipe 18 through the flange, facilitating the replenishment of water into the interior of the heat exchange coil 9.

[0048] Specifically, through the provided water inlet pipe 18, the staff connects the external multi-way pipeline to the water inlet pipe 18 through the flange. After the water inside the heat exchange coil 9 is heated, it will finally enter the boiler through the water tank 12. At this time, the electromagnetic valve 17 is opened, and the water in the multi-way pipeline enters the interior of the heat exchange coil 9 through the water inlet pipe 18 and the electromagnetic valve 17, achieving the water inlet effect of the heat exchange coil 9.

[0049] A connection hole 42 is formed on the top surface of the treatment tank 3. The stainless steel filter screen 41 is slidably connected to the connection hole 42. A clamping groove corresponding to the connection hole 42 is formed on the inner bottom surface of the treatment tank 3. The stainless steel filter screen 41 is slidably connected to the clamping groove, and the stainless steel filter screen 41 can be limited through the connection hole 42 and the clamping groove;

[0050] Two fixing blocks 38 are fixedly installed on both sides of the interior of the processing box 3. A support box 40 is rotatably connected between the two fixing blocks 38 via a rotating shaft. A plurality of nozzles 48 are fixedly installed on one side of the support box 40. The support box 40 and the plurality of nozzles 48 are arranged on the right side of the stainless steel filter 41, that is, opposite to the direction in which the exhaust steam passes through the stainless steel filter 41. A hose 39 is fixedly installed on one side of the support box 40. One end of the hose 39 passes through the processing box 3 and extends to the outside of the processing box 3. A flange is fixedly sleeved on the outer wall of the hose 39, and the external pipeline can be connected to the hose 39 through the flange.

[0051] The stainless steel filter 41 may become clogged after filtering the exhaust steam. Water enters the support box 40 through the hose 39 and is then sprayed out through the multiple nozzles 48 to backwash the stainless steel filter 41 and clean the impurities in the stainless steel filter 41.

[0052] A missing gear 47 is fixedly installed on one side of the support box 40, and the inner top surface of the processing box 3 is rotatably connected to the sector gear 43 through a rotating shaft. The sector gear 43 is meshed with the missing gear 47. A connecting frame 49 is fixedly installed on one side of the sector gear 43. The two connecting frames 49 are slidably connected to the sliding frames 46. A connecting shaft is installed inside the sliding frames 46, and the connecting shaft is slidably connected to the two connecting frames 49. A positioning block 44 is fixedly installed on the inner top surface of the processing box 3. An electric push rod 2 45 for driving the sliding frame 46 to move is installed on one side of the positioning block 44. One end of the telescopic shaft of the electric push rod 2 45 is fixedly connected to one side of the sliding frame 46, and the PLC controller is electrically connected to the electric push rod 2 45;

[0053] Among them, the electric push rod 2 45 is telescopically moved back and forth, and the electric push rod 2 45 drives the connecting frame 49 to move back and forth. The forward and backward movement of the connecting frame 49 drives the connecting frame 49 and the sector teeth 43 to rotate back and forth. The sector teeth 43 rotate back and forth and cooperate with the missing gear 47 to drive the support box 40 and multiple nozzles 48 to rotate back and forth, thereby flushing various places on the stainless steel filter 41.

[0054] The water in the hose 39 will enter the interior of the support box 40 and be sprayed to the back side of the stainless steel filter 41 through a plurality of nozzles 48, thereby flushing the stainless steel filter 41. At the same time, the telescopic shaft of the electric push rod 2 45 moves back and forth, driving the sliding frame 46 to move back and forth. The sliding frame 46 moves back and forth, driving the connecting frame 49 to rotate back and forth. The connecting frame 49 rotates back and forth, driving the sector gear 43 to rotate back and forth. The sector gear 43 rotates back and forth, driving the missing gear 47 to rotate back and forth. The missing gear 47 rotates back and forth, driving the support box 40 and a plurality of nozzles 48 to rotate back and forth between the two fixed blocks 38, thereby utilizing the nozzles 48 to flush various places on the stainless steel filter 41, thereby achieving a backwashing effect on the stainless steel filter 41, and facilitating the filtering of the exhaust steam.

[0055] A water pump 13 is fixedly installed on one side of the water tank 12, and a water pipe 14 is fixedly connected to the inner circular wall of the water outlet of the water pump 13, and a flange is fixedly connected to the outer circular wall of the water pipe 14. The water pipe 14 can be connected to the boiler water inlet pipe through the flange. An electronic thermometer 50 for temperature measurement is fixedly installed on one side of the water tank 12. The electronic thermometer 50 can measure the water temperature in the water tank 12. By setting a threshold temperature for the electronic thermometer 50, the water inside the water tank 12 can be transported to the boiler for use through the water pump 13 and the water pipe 14 when the predetermined water temperature is reached. The water pump 13 and the electronic thermometer 50 are both electrically connected to the PLC controller.

[0056] Specifically, the staff sets a threshold temperature for the electronic thermometer 50 through the electronic thermometer 50. When the electronic thermometer 50 detects that the water inside the water tank 12 reaches the threshold temperature, the PLC controller starts the water pump 13, and the water pump 13 transports the water inside the water tank 12 to the boiler through the water pipe 14, thereby utilizing the exhaust heat of the turbine body 1 to heat the water entering the boiler in advance, thereby reducing the energy consumption of the boiler.

[0057] A collecting box 4 is fixedly installed on the bottom surface of the processing box 3, and a PTFE microporous filter membrane 16 is fixedly sleeved inside the collecting box 4. On the one hand, the PTFE microporous filter membrane 16 has natural hydrophobicity and can effectively repel water molecules, so that liquid water forms water droplets on the surface of the filter membrane, making it easier to pass through the filter membrane. On the other hand, the PTFE microporous filter membrane 16 has a high porosity and excellent air permeability, but a small pore size, which can effectively prevent gaseous exhaust steam from passing through while allowing liquid condensed water to pass through. A drain valve 15 for drainage is fixedly installed on one side of the collecting box 4, and the interior of the collecting box 4 is inclined toward the side close to the drain valve 15, and the drain valve 15 is electrically connected to the PLC controller.

[0058] Specifically, when the exhaust steam contacts the heat exchange coil 9, condensate will be generated. The condensate enters the interior of the collection box 4 through the PTFE microporous filter membrane 16 for collection. The staff opens the drain valve 15 through the PLC controller. The opening of the drain valve 15 causes the condensate inside the collection box 4 to be discharged, thereby using the condensate to supplement the water required by the heat exchange coil 9 and realizing the recycling of water.

[0059] Two support frames 5 are fixedly installed on the bottom surface of the treatment box 3. Two support holes 6 are opened on the top surface of the support frame 5. The treatment box 3 can be fixed to the ground by the cooperation of bolts and the support holes 6. Two threaded columns 37 penetrate through both sides of the treatment box 3. Threaded grooves are opened on both sides of the stainless steel filter screen 41. One end of the threaded column 37 penetrates through the treatment box 3 and is threadedly connected to the threaded groove. The stainless steel filter screen 41 can be fixed by the threaded column 37.

[0060] Specifically, through the arranged threaded column 37, the staff rotates the threaded column 37 to separate one end of the threaded column 37 from the threaded groove on the stainless steel filter screen 41, thereby removing the threaded column 37. Then, the staff can take out the stainless steel filter screen 41 from the connection hole 42, which is convenient for replacing the stainless steel filter screen 41. The staff can fix the treatment box 3 to the ground by putting the bolt into the support hole 6 on the support frame 5, achieving the installation effect of the treatment box 3.

[0061] As a preferred implementation method in this embodiment, please refer to Figures 1 to 10 , and the specific step flow is as follows:

[0062] Step 1: When the steam turbine body 1 works, exhaust steam is generated. The exhaust steam enters the treatment box 3 through the exhaust pipe 2. The stainless steel filter screen 41 filters the exhaust steam to remove impurities therein.

[0063] Step 2: The exhaust steam contacts a plurality of heat exchange coils 9 in sequence. The water in the heat exchange coil 9 absorbs the heat of the exhaust steam and heats up. The temperature sensor 33 corresponding to each heat exchange coil 9 detects the temperature of the exhaust steam. If the temperature of the exhaust steam is higher than the set threshold, the corresponding baffle 20 closes, and the exhaust steam continues to contact the next group of heat exchange coils 9; if the temperature of the exhaust steam is lower than the threshold, the corresponding exhaust valve 10 opens, and the exhaust steam is discharged; the water in the heat exchange coil 9 enters the water tank 12 through the pump body one 51 and the water outlet pipe 52. The water in the water tank 12 returns to the heat exchange coil 9 through the pump body two 53 and the return pipe 54, realizing cyclic heating.

[0064] Step 3: After the water temperature in the water tank 12 reaches the set threshold, it is transported to the boiler through the water pump 13 and the water delivery pipe 14 for preheating the boiler feed water. The condensate generated when the exhaust steam contacts the heat exchange coil 9 enters the collection box 4 through the PTFE microporous filter membrane 16. The condensate in the collection box 4 is discharged through the drain valve 15 and is used to supplement the water required by the heat exchange coil 9.

[0065] Step 4: When the stainless steel filter screen 41 is blocked, water is injected into the support box 40 through the hose 39. The water is sprayed out through the nozzle 48 to reversely wash the stainless steel filter screen 41. The electric push rod two 45 drives the sliding frame 46 to move, driving the sector gear 43 and the missing gear 47 to rotate, so that the support box 40 and the nozzle 48 rotate back and forth to achieve a comprehensive washing of the stainless steel filter screen 41.

[0066] Working principle: Through the provided steam turbine body 1, exhaust steam is generated when the steam turbine body 1 works. The exhaust steam enters the treatment box 3 through the exhaust pipe 2. The stainless steel filter screen 41 filters the exhaust steam to remove impurities therein.

[0067] Secondly, the exhaust steam successively contacts multiple heat exchange coils 9. The water in the heat exchange coils 9 absorbs the heat of the exhaust steam and heats up. The temperature sensor 33 corresponding to each heat exchange coil 9 detects the temperature of the exhaust steam. If the temperature of the exhaust steam is higher than the set threshold, the electric push rod one 24 drives the baffle 20 to close, and the exhaust steam continues to contact the next group of heat exchange coils 9. If the temperature of the exhaust steam is lower than the threshold, the corresponding exhaust valve 10 opens and the exhaust steam is discharged.

[0068] Meanwhile, after the water temperature in the water tank 12 reaches the set threshold, it is transported to the boiler through the water pump 13 and the water delivery pipe 14 for preheating the boiler feed water. The condensed water generated when the exhaust steam contacts the heat exchange coils 9 enters the collection box 4 through the PTFE microporous filter membrane 16. The condensed water in the collection box 4 is discharged through the drain valve 15 to supplement the water required for the heat exchange coils 9.

[0069] Finally, when the stainless steel filter screen 41 is blocked, water is injected into the support box 40 through the hose 39. The water is sprayed out through the nozzle 48 to reversely wash the stainless steel filter screen 41. The electric push rod two 45 drives the sliding frame 46 to move, driving the sector gear 43 and the missing gear 47 to rotate, so that the support box 40 and the nozzle 48 rotate back and forth to achieve a comprehensive washing of the stainless steel filter screen 41.

[0070] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A steam turbine waste heat recovery system, characterized in that, Including: The steam turbine body (1), on one side of the steam turbine body (1), an exhaust pipe (2) for exhausting is installed. On one side of the steam turbine body (1), a treatment box (3) is provided. The exhaust pipe (2) is communicated with the treatment box (3). A collection box (4) for collecting water is fixedly installed on the bottom surface of the treatment box (3); a stainless steel filter screen (41) is slidably connected inside the treatment box (3); A waste heat recovery mechanism (7), the waste heat recovery mechanism (7) is arranged on one side of the collection box (4) for recovering waste heat; The waste heat recovery mechanism (7) includes a water tank (12), the water tank (12) is fixedly installed on one side of the treatment box (3). A plurality of mounting plates (8) are fixedly installed inside the treatment box (3). A heat exchange coil (9) for heat exchange is installed between every two mounting plates (8). The pipe diameters of the plurality of heat exchange coils (9) show a decreasing trend from left to right. The change in pipe diameter changes the water flow rate in the heat exchange coil (9) to cooperate with the attenuation of the waste steam heat and pressure accordingly. The heat exchange coil (9) realizes circulation with the water tank (12) through a pipeline. A plurality of shielding frames (11) are fixedly installed inside the treatment box (3). One side of the shielding frame (11) is fixedly installed with a communication pipe (19). On one side of the communication pipe (19), there are two baffles (20) that open and close according to the waste steam temperature.

2. The steam turbine waste heat recovery system according to claim 1, characterized in that: A water outlet pipe (52) is connected to the heat exchange coil (9). A number of first pumps (51) are fixedly installed on the bottom surface of the water tank (12). The water outlet pipe (52) is connected to the first pumps (51). A return pipe (54) is connected to the heat exchange coil (9). A number of second pumps (53) are fixedly installed on the bottom surface of the water tank (12). The return pipe (54) is connected to the second pumps (53). A support plate (21) is fixedly installed on one side of the shielding frame (11). A first carrier (27) is fixedly installed on one side of the support plate (21). A mounting shaft (28) is fixedly installed on the top surface of the baffle (20) on the right side. One end of the mounting shaft (28) penetrates through the first carrier (27) and is fixedly installed with a first connecting rod (26). A connecting frame (25) is rotatably connected to the first connecting rod (26). An electric push rod one (24) for driving the connecting frame (25) to move is installed on the top surface of the support plate (21). A third connecting rod (30) is rotatably connected to the top surfaces of the two baffles (20). A second connecting rod (29) is rotatably connected to the top surface of the third connecting rod (30). One end of the second connecting rod (29) is rotatably connected to the top surface of the first carrier (27). Fixed rods (35) are inclinedly installed on the bottom surfaces of the two baffles (20). A fourth connecting rod (36) is connected to the bottom surfaces of the two fixed rods (35). A slide rail (22) is installed on one side of the connecting pipe (19). A slider (23) is slidably connected inside the slide rail (22). The baffle (20) on the left side is rotatably connected to the slider (23). A temperature sensor (33) for measuring the temperature of exhaust steam is fixedly installed on one side of the baffle (20) on the left side. A number of exhaust valves (10) for exhausting steam are fixedly installed on the top surface of the processing box (3).

3. The steam turbine waste heat recovery system according to claim 2, wherein: Installation grooves (31) are formed on the two sides of the two baffles (20) close to each other. A half gear (32) is fixedly installed inside the installation groove (31). The two half gears (32) are meshed and connected.

4. A steam turbine waste heat recovery system according to claim 1, characterized in that: An electromagnetic valve (17) is fixedly installed on one side of the heat exchange coil (9). The electromagnetic valve (17) is connected to the heat exchange coil (9). A water inlet pipe (18) for water inlet is fixedly sleeved on the inner circular wall surface of the electromagnetic valve (17). One end of the water inlet pipe (18) is fixedly sleeved with a flange.

5. A steam turbine waste heat recovery system according to claim 2, characterized in that: A connection hole (42) is formed in the top surface of the treatment box (3), and the stainless steel filter screen (41) is slidably connected to the connection hole (42). Two fixing blocks (38) are fixedly installed on both sides inside the treatment box (3). A support box (40) is rotatably connected between the two fixing blocks (38). A plurality of spray heads (48) are fixedly installed on one side of the support box (40). A hose (39) is fixedly installed on one side of the support box (40). A missing gear (47) is fixedly installed on one side of the support box (40). A sector gear (43) is rotatably connected to the inner top surface of the treatment box (3). The sector gear (43) is meshed with the missing gear (47). A connection frame (49) is fixedly installed on one side of the sector gear (43). A sliding frame (46) is slidably connected to the two connection frames (49). A positioning block (44) is fixedly installed on the inner top surface of the treatment box (3). An electric push rod two (45) for driving the sliding frame (46) to move is installed on one side of the positioning block (44).

6. A steam turbine waste heat recovery system according to claim 1, characterized in that: A water pump (13) is fixedly installed on one side of the water tank (12). A water delivery pipe (14) is fixedly sleeved on the inner circular wall surface of the water outlet hole of the water pump (13). An electronic thermometer (50) for measuring temperature is fixedly installed on one side of the water tank (12).

7. A steam turbine waste heat recovery system according to claim 1, characterized in that: A collection box (4) is fixedly installed on the bottom surface of the treatment box (3). A PTFE microporous filter membrane (16) is fixedly sleeved inside the collection box (4). A drain valve (15) for draining water is fixedly installed on one side of the collection box (4).

8. A steam turbine waste heat recovery system according to claim 1, characterized in that: Two support frames (5) are fixedly installed on the bottom surface of the treatment box (3). Two support holes (6) are formed in the top surface of the support frames (5). The treatment box (3) can be fixed on the ground by matching bolts with the support holes (6). Two threaded columns (37) penetrate through both sides of the treatment box (3). One end of the threaded column (37) is threadedly connected to one side of the stainless steel filter screen (41).

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