A steam waste heat recovery device

Abstract

The present invention relates to the technical field of waste heat recovery, and specifically discloses a steam waste heat recovery device, including a main shell, a heating steam pipeline and a domestic water pipeline connected to the main shell, and the domestic water pipeline is heated by the heating steam pipeline. The main shell includes a waste heat heating structure, an air intake boosting structure, an exhaust pressure reducing structure and a waste water tank. The air intake boosting structure and the exhaust pressure reducing structure adjust the steam pressure through a piston structure. The heating steam pipeline is connected to the waste heat heating structure and then passes into the waste heat heating structure, and then is discharged after being decompressed and dehumidified by the exhaust pressure reducing structure. The waste water tank collects the waste water generated in the waste heat heating structure and the exhaust pressure reducing structure. The device realizes the waste heat utilization of the heating system, preheats the domestic water by the steam waste heat, and helps old communities solve the problem of frozen pipes in winter. The device is easy to install and does not require large-scale changes to the existing pipe network.

Description

Technical Field

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

[0002] Waste heat recovery refers to the process of capturing and reusing heat energy generated from industrial production, electricity production or other energy consumption processes. This heat is usually dissipated into the environment in the form of waste heat, but through waste heat recovery technology, it can be used to heat water, heat buildings, drive absorption chillers, etc. This technology helps to reduce energy consumption, save costs, and reduce negative impacts on the environment.

[0003] In traditional steam heating systems, exhaust gases are usually discharged into the atmosphere through chimneys or similar exhaust passages. Some modern steam heating systems use condensation technology to increase energy efficiency. This system condenses the steam in the exhaust gas into water, which can be collected and processed within the system instead of being discharged directly into the atmosphere. In urban heating systems, steam still has enough heat after heating, but the waste heat is not fully utilized. In winter water supply, domestic water will face the problem of pipe freezing. How to make full use of the waste heat from heating to preheat domestic water is an urgent problem that needs to be solved in the face of frozen pipes in winter in old communities. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above technical problems and provide a steam waste heat recovery device.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a steam waste heat recovery device, including a main shell, a heating steam pipe and a domestic water pipe are connected to the main shell, and the domestic water pipe is heated by the heating steam pipe. The main shell includes a waste heat heating structure, an air intake boosting structure, an exhaust pressure reducing structure and a waste water tank. The air intake boosting structure and the exhaust pressure reducing structure adjust the steam pressure through a piston structure. The heating steam pipe is connected to the waste heat heating structure and then passes into the waste heat heating structure, and then is discharged after being decompressed and dehumidified by the exhaust pressure reducing structure. The waste water tank collects the waste water generated in the waste heat heating structure and the exhaust pressure reducing structure.

[0006] The waste heat heating structure includes a heating box and a water pipe group. The front and rear ends of the heating box are respectively provided with an air inlet interface and an exhaust interface connected to the air intake boost structure and the exhaust pressure reduction structure. The water pipe group includes a water inlet pipe, a vertical branch pipe and a water outlet pipe. Multiple vertical branch pipes are arranged in the heating box, and each row of vertical branch pipes is connected by a connecting pipe. One end of the water inlet pipe is provided with a water inlet branch pipe connected to the vertical branch pipe, and one end of the water outlet pipe is provided with a water outlet branch pipe connected to the vertical branch pipe. Wing plates are provided on the outside of the vertical branch pipes, and the angles of the wing plates in adjacent rows are opposite. A drainage pipe connected to the waste water tank is provided at the bottom of the heating box, and the waste heat from heating is used to heat domestic water.

[0007] As an improvement: the air intake and boosting structure includes a shell body 1, a boosting chamber is provided on the shell body 1, an air intake pipe 1 and an exhaust pipe 1 are provided on both sides of the boosting chamber, a boosting plate 1 and a boosting plate 2 which move towards each other are slidably provided in the boosting chamber, a motor 1 and a turntable are provided in the shell body 1, a hinge rod 1 and a hinge rod 2 are provided on both sides of the turntable, the output end of the motor 1 is connected with the hinge rod 1, a vertical pipe is provided at the bottom of the boosting plate 2, a transmission rod 2 is hingedly provided between the vertical pipe and the hinge rod 2, a vertical rod passing through the vertical pipe is provided at the bottom of the boosting plate 1, a transmission rod 1 is hingedly provided between the vertical rod and the hinge rod 1, and the steam temperature is supplemented through the air intake and boosting structure.

[0008] As an improvement: the exhaust decompression structure includes a shell body two, a decompression chamber is provided on the shell body two, an air inlet pipe two and an exhaust pipe two are provided on both sides of the decompression chamber, a decompression piston is provided slidingly in the decompression chamber, a motor two is provided inside the shell body two, an eccentric rotating rod is provided at the output end of the motor two, a position-shifting transmission angle rod is hingedly provided on the eccentric rotating rod, a transmission rod three is hingedly provided at the bottom of the decompression piston, one end of the position-shifting transmission angle rod is hingedly provided to the bottom of the transmission rod three, and the water vapor content of the exhaust gas is reduced through the exhaust decompression structure.

[0009] As an improvement: an adjustment structure is provided in the shell two, and the adjustment structure includes a motor three. An eccentric wheel is provided at the output end of the motor three. An adjustment rod is hingedly provided at the other end of the position shift transmission angle rod. A swivel is provided at one end of the adjustment rod for rotating with the eccentric wheel. A drain pipe connected to the waste water tank is provided at the lowest position of the decompression piston in the decompression chamber, and adjustable and controllable drainage is achieved through the adjustment structure.

[0010] As an improvement: fan wheels are fixed on the eccentric rotating rods on both sides of the position-shifting transmission angle rod. When the pressure-reducing piston is in the lowest position, the fan surface of the fan wheel is facing upward, and the energy stored in the fan wheel assists the movement of the pressure-reducing piston.

[0011] As an improvement: the air inlet pipe 1 is connected to the external heating steam pipeline, the exhaust pipe 1 is connected to the air inlet interface, the air inlet pipe 1 is provided with a one-way valve 1, and the exhaust pipe 1 is provided with a one-way valve 2. The one-way valves are used to prevent steam backflow during the pressurization process.

[0012] As an improvement: the air inlet pipe 2 is connected to the exhaust interface, and a one-way valve 3 and a one-way valve 4 are respectively provided on the air inlet pipe 2 and the exhaust pipe 2. A pressure regulating valve is provided on the front side of the one-way valve 3 of the air inlet pipe 2 to prevent steam reflux during the decompression process through the one-way valve.

[0013] Beneficial effects: This device realizes the waste heat utilization of the heating system, preheats the domestic water through the waste heat of steam, helps old communities solve the problem of frozen pipes in winter, is easy to install, and does not require large-scale changes to the existing pipe network. Specifically:

[0014] 1. Through the design of waste heat heating structure, domestic water enters into multiple vertical branches, and through the layout of wing plates and the design of vertical branches, the contact area and contact time between steam and wing plates are increased, so that the waste heat can heat domestic water more fully;

[0015] 2. The air inlet pressurization structure solves the impact of unstable heating temperature on domestic water preheating in some areas. The preheating temperature of domestic water is guaranteed by heating the steam at a lower temperature.

[0016] 3. Through the exhaust pressure reduction structure, the high-pressure and low-temperature steam can reduce the pressure, thereby reducing the temperature. In conjunction with the low-temperature pressure reduction chamber, the steam can condense into water flow. By adjusting the structure, the collected water flow can enter the wastewater tank to collect the wastewater and avoid icing of the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a steam waste heat recovery device of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of a steam waste heat recovery device of the present invention. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the internal structure of a steam waste heat recovery device of the present invention. Figure 2 .

[0020] Figure 4 It is a structural schematic diagram of a waste heat heating structure of a steam waste heat recovery device of the present invention.

[0021] Figure 5 It is a schematic diagram of the internal structure of a waste heat heating structure of a steam waste heat recovery device of the present invention.

[0022] Figure 6 It is a cross-sectional view of a waste heat heating structure of a steam waste heat recovery device of the present invention.

[0023] Figure 7 It is a structural schematic diagram of an air inlet pressurization structure of a steam waste heat recovery device of the present invention.

[0024] Figure 8 It is a cross-sectional view of an air inlet pressurization structure of a steam waste heat recovery device of the present invention.

[0025] Fig. 9 It is a schematic diagram of the internal structure of an air inlet pressurization structure of a steam waste heat recovery device of the present invention.

[0026] Fig.10 It is a structural schematic diagram of an exhaust pressure reducing structure of a steam waste heat recovery device of the present invention.

[0027] Fig.11It is a cross-sectional view of an exhaust pressure reducing structure of a steam waste heat recovery device of the present invention.

[0028] Fig.12 It is a schematic diagram of the internal structure of an exhaust pressure reducing structure of a steam waste heat recovery device of the present invention.

[0029] As shown in the figure: 1. Main shell; 2. Waste heat heating structure; 3. Air intake boost structure; 4. Exhaust pressure reduction structure; 5. Waste water tank; 21. Heating box; 22. Air intake interface; 23. Exhaust interface; 24. Water inlet pipe; 25. Water inlet manifold; 26. Vertical branch pipe; 261. Connecting pipe; 262. Wing plate; 27. Water outlet manifold; 28. Water outlet pipe; 29. ​​Drain pipe; 31. Shell 1; 311. Boosting chamber; 312. Air inlet pipe 1; 313. Exhaust pipe 1; 314. One-way valve 1; 315. One-way valve 2; 32. Motor 1; 33. Turntable; 331. Hinge rod 1; 332. hinge rod two; 34. boost plate one; 341. vertical rod; 35. boost plate two; 351. vertical pipe; 36. transmission rod one; 37. transmission rod two; 41. shell two; 411. decompression chamber; 412. air inlet pipe two; 413. exhaust pipe two; 414. pressure regulating valve; 415. check valve three; 416. check valve four; 417. drain pipe; 42. motor two; 421. eccentric rotating rod; 43. displacement transmission angle rod; 44. transmission rod three; 45. decompression piston; 46. motor three; 47. eccentric wheel; 48. adjusting rod; 481. swivel; 49. fan wheel. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0031] Combined with Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a steam waste heat recovery device includes a main shell 1, a heating steam pipe and a domestic water pipe are connected to the main shell 1, and the domestic water pipe is heated by the heating steam pipe. The main shell 1 includes a waste heat heating structure 2, an air intake boosting structure 3, an exhaust pressure reducing structure 4 and a waste water tank 5. The air intake boosting structure 3 and the exhaust pressure reducing structure 4 adjust the steam pressure through a piston structure. The heating steam pipe is connected to the waste heat heating structure 2 and then passes into the waste heat heating structure 2, and then is discharged after being decompressed and dehumidified by the exhaust pressure reducing structure 4. The waste water tank 5 collects the waste water generated in the waste heat heating structure 2 and the exhaust pressure reducing structure 4.

[0032] Combined with Figure 4 , Attachment Figure 5 and attached Figure 6As shown, the waste heat heating structure 2 includes a heating box 21 and a water pipe group. The front and rear ends of the heating box 21 are respectively provided with an air inlet interface 22 and an exhaust interface 23 connected to the air inlet pressurization structure 3 and the exhaust pressure reduction structure 4. The water pipe group includes a water inlet pipe 24, a vertical branch pipe 26 and a water outlet pipe 28. A plurality of vertical branch pipes 26 are arranged in the heating box 21. Each row of vertical branch pipes 26 is connected by a connecting pipe 261. One end of the water inlet pipe 24 is provided with a water inlet branch 25 connected to the vertical branch pipe 26. One end of the water outlet pipe 28 is provided with a water outlet branch 27 connected to the vertical branch pipe 26. A wing plate 262 is provided on the outer side of the vertical branch pipe 26. The angles of the wing plates 262 in adjacent rows are opposite. A drainage pipe 29 connected to the waste water tank 5 is provided at the bottom of the heating box 21.

[0033] Working principle of the waste heat heating structure 2: After the steam enters the heating box 21 from the air inlet interface 22 of the air inlet booster structure 3, it is blocked by the wing plate 262 and changes direction. Since the angles of the wing plates 262 in adjacent rows are opposite, the steam flow direction is winding, which increases the flow path of the steam in the heating box 21, so that the waste heat of the steam can be more fully transferred to the wing plate 262, and the vertical branch pipe 26 is heated by the wing plate 262. At the same time, domestic water flows into multiple relatively slender vertical branch pipes 26. The vertical branch pipes 26 extend along the steam direction in the heating box 21, also in a winding shape. The winding design of multiple vertical branch pipes 26 increases the contact area and contact time between the vertical branch pipes 26 and the steam, so that the temperature can be quickly increased.

[0034] Combined with Figure 7 , Attachment Figure 8 and attached Fig. 9 As shown, the air intake boost structure 3 includes a shell 31, a boost chamber 311 is provided on the shell 31, a temperature sensor is provided in the boost chamber 311, an air intake pipe 312 and an exhaust pipe 313 are provided on both sides of the boost chamber 311, the air intake pipe 312 is connected to the external heating steam pipeline, the exhaust pipe 313 is connected to the air intake interface 22, a check valve 314 is provided on the air intake pipe 312, a check valve 315 is provided on the exhaust pipe 313, and a sliding valve 316 is provided in the boost chamber 311. The boost plate 1 34 and the boost plate 2 35 are provided with a motor 1 32 and a turntable 33 in the shell 1 31, and hinge rod 1 331 and hinge rod 2 332 are provided on both sides of the turntable 33. The output end of the motor 1 32 is connected to the hinge rod 1 331, and a vertical pipe 351 is provided at the bottom of the boost plate 2 35, and a transmission rod 2 37 is hingedly provided between the vertical pipe 351 and the hinge rod 2 332. The bottom of the boost plate 1 34 is provided with a vertical rod 341 passing through the vertical pipe 351, and a transmission rod 1 36 is hingedly provided between the vertical rod 341 and the hinge rod 1 331.

[0035] Working principle of air intake and pressurization structure 3: after the steam completes heating for the building, it is connected to air intake pipe 1 312 and enters into pressurization chamber 311. Motor 1 32 drives turntable 33 connected to hinge rod 1 331 to rotate. Hinge rod 1 331 and hinge rod 2 332 on both sides of turntable 33 rotate, respectively through transmission rod 1 36 and transmission rod 2 37, driving vertical rod 341 and vertical pipe 351 to reciprocate up and down, and the movement directions are opposite, driving pressurization plate 1 34 and pressurization plate 2 35 to reciprocate towards each other, so that the steam in pressurization chamber 311 is pressurized. Compared with the movement of a single piston, the pressurization process is more obvious in a limited space when two pressurization plates move towards each other. This process is achieved through the cooperation of one-way valve 1 314 and one-way valve 2 315 on air intake pipe 1 312 and exhaust pipe 1 313. When the plate 1 35 moves away, steam actively enters at this time, and the one-way valve 2 315 prevents the steam from flowing back. When the boost plate 1 34 and the boost plate 2 35 move close to each other, the one-way valve 1 314 prevents the high-pressure steam from flowing back. At the same time, the one-way valve 2 315 restricts the steam in the boost chamber 311. When the pressure reaches a certain level, the one-way valve 2 315 opens to allow the steam to enter the heating box 21. By boosting the pressure, the molecular movement of the steam is activated, thereby playing a role in heating. The one-way valve 2 315 and the pressure regulating valve 414 cooperate to make the air pressure in the heating box 21 the same as the steam after boosting, thereby avoiding large heat loss after the steam enters the larger heating box 21. This process is carried out when it is detected that the incoming steam temperature is low. When the steam temperature is high, the steam directly enters the heating box 21 through the boost chamber 311.

[0036] Combined with Fig.10 , Attachment Fig.11 and attached Fig.12 As shown, the exhaust decompression structure 4 includes a second shell 41, a decompression chamber 411 is provided on the second shell 41, a temperature sensor and a pressure sensor are provided in the decompression chamber 411, an air inlet pipe 412 and an exhaust pipe 413 are provided on both sides of the decompression chamber 411, the air inlet pipe 412 is connected to the exhaust interface 23, a check valve 415 and a check valve 416 are provided on the second air inlet pipe 412 and the exhaust pipe 413 respectively, and a pressure regulating valve 414 is provided on the front side of the check valve 415 of the second air inlet pipe 412 to reduce the pressure. A pressure reducing piston 45 is slidingly provided in the pressure chamber 411, a motor 2 is provided inside the housing 2 41, an eccentric rotating rod 421 is provided at the output end of the motor 2 42, a position shifting transmission angle rod 43 is hingedly provided on the eccentric rotating rod 421, a transmission rod 3 44 is hingedly provided at the bottom of the pressure reducing piston 45, one end of the position shifting transmission angle rod 43 is hingedly connected to the bottom of the transmission rod 3 44, fan wheels 49 are fixedly provided on the eccentric rotating rods 421 on both sides of the position shifting transmission angle rod 43, and when the pressure reducing piston 45 is in the lowest position, the fan surface of the fan wheel 49 is positioned upward.

[0037] Working principle of exhaust pressure reduction structure 4: before high-pressure cooling steam enters pressure reduction chamber 411 through air inlet pipe 2 412, the steam pressure is adjusted to low pressure state in advance through pressure regulating valve 414, and then enters pressure reduction chamber 411 for further pressure reduction, motor 2 42 drives eccentric rotating rod 421 to rotate, and eccentric rotating rod 421 cooperates with displacement transmission angle rod 43 and transmission rod 3 44 to make pressure reduction piston 45 reciprocate up and down, and pressure reduction action is performed when pressure reduction piston 45 moves downward, and gas is discharged from exhaust pipe 2 413 when pressure reduction piston 45 moves upward. In order to avoid water vapor carried by air flow after temperature reduction and ice formation on subsequent pipelines, causing air pipe blockage and affecting heating, it is necessary to reduce the water vapor content, and through pressure reduction and temperature reduction of pressure reduction chamber 411 and low temperature of outer wall of pressure reduction chamber 411, water vapor condenses and liquefies on inner wall of pressure reduction chamber 411 to reduce the water vapor content in exhaust gas.

[0038] Combined with Figure 3 , Attachment Fig.10 and attached Fig.12 As shown, an adjustment structure is provided in the shell 2 41, and the adjustment structure includes a motor 3 46, an eccentric wheel 47 is provided at the output end of the motor 3 46, an adjustment rod 48 is hingedly provided at the other end of the shift transmission angle rod 43, and a swivel 481 is provided at one end of the adjustment rod 48 for rotationally cooperating with the eccentric wheel 47, and a drain pipe 417 connected to the waste water tank 5 is provided at the lowest position of the decompression piston 45 in the decompression chamber 411.

[0039] Working principle of the adjustment structure: in order to allow the condensed water flow in the decompression chamber 411 to be discharged to the waste water tank 5 without affecting the decompression process, in normal operation, the lowest point of the decompression piston 45 is higher than the interface through hole of the drain pipe 417, so that the water flow is gathered on the decompression piston 45. After gathering to a certain extent, the lowest point of the movement of the decompression piston 45 is changed by the adjustment structure, so that the water flow can enter the waste water tank 5 through the drain pipe 417. The adjustment structure changes the movement position of the decompression piston 45 by changing the movement posture of the displacement transmission angle rod 43. Under the restriction of the adjustment rod 48, the angle change of the displacement transmission angle rod 43 is small, and it rotates almost parallel and swings during the rotation process. Through the rotation process and the swinging action, the transmission rod three 44 drives the decompression piston 45 to reciprocate, and the adjustment rod 48 swings. The motor three 46 drives the eccentric wheel 47 to rotate, so that the swing axis of the adjustment rod 48 changes, thereby adjusting the angle of the displacement transmission angle rod 43 to achieve the effect of adjusting the movement position of the decompression piston 45.

[0040] When the present invention is implemented, the device is placed at the end of the heating of the building area. After the heating pipeline completes the heating of the urban area, the steam first enters the air inlet pressurization structure 3 to detect whether the steam temperature after heating meets the waste heat utilization requirements. When the temperature is high, the steam directly enters the waste heat heating structure 2. When the temperature is low, the steam temperature is further increased by pressurization. The waste heat of the steam is transferred to the domestic water supply in the waste heat heating structure 2, so that the domestic water has a certain temperature in winter to avoid freezing. In the exhaust pressure reduction structure 4, the steam is decompressed and cooled to reduce the water vapor content to avoid freezing of the exhaust pipe. A wind power generation structure can be added at the tail end of the exhaust pipe to power the device.

[0041] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A steam waste heat recovery device, comprising a main shell (1), a heating steam pipeline and a domestic water pipeline connected to the main shell (1), and the domestic water pipeline is heated by the heating steam pipeline, characterized in that: The main shell (1) comprises a waste heat heating structure (2), an air intake boosting structure (3), an exhaust pressure reducing structure (4) and a waste water tank (5). The air intake boosting structure (3) and the exhaust pressure reducing structure (4) adjust the steam pressure through a piston structure. The heating steam pipeline is connected to the air intake boosting structure (3) and then passes into the waste heat heating structure (2). The steam is then discharged after being decompressed and dehumidified by the exhaust pressure reducing structure (4). The waste water tank (5) collects the waste water generated in the waste heat heating structure (2) and the exhaust pressure reducing structure (4). The waste heat heating structure (2) comprises a heating box (21) and a water pipe group. The heating box (21) is provided with an air inlet interface (22) and an air outlet interface (23) connected to an air inlet pressure boosting structure (3) and an air outlet pressure reducing structure (4) at the front and rear ends respectively. The water pipe group comprises an inlet pipe (24), a vertical branch pipe (26) and an outlet pipe (28). A plurality of vertical branch pipes (26) are arranged in the heating box (21). Each row of vertical branch pipes (26) is connected via a connecting pipe (261). One end of the inlet pipe (24) is provided with an inlet water branch pipe (25) connected to the vertical branch pipe (26). One end of the outlet pipe (28) is provided with an outlet water branch pipe (27) connected to the vertical branch pipe (26). Wing plates (262) are provided on the outside of the vertical branch pipe (26). The angles of the wing plates (262) in adjacent rows are opposite. A drainage pipe (29) connected to a waste water tank (5) is provided at the bottom of the heating box (21).

2. A steam waste heat recovery device according to claim 1, characterized in that: The air intake boost structure (3) comprises a shell (31), a boost chamber (311) is provided on the shell (31), an air intake pipe (312) and an exhaust pipe (313) are provided on both sides of the boost chamber (311), a boost plate (34) and a boost plate (35) are slidably provided in the boost chamber (311) and move in opposite directions, a motor (32) and a turntable (33) are provided in the shell (31), a hinge rod (331) and a hinge rod (332) are provided on both sides of the turntable (33), an output end of the motor (32) is connected to the hinge rod (331), and the boost plate (35) is provided with a plurality of hinge rods (331) and a plurality of hinge rods (332). ) is provided with a vertical pipe (351) at the bottom, a transmission rod (37) is hingedly provided between the vertical pipe (351) and the second hinge rod (332), a vertical rod (341) passing through the vertical pipe (351) is provided at the bottom of the boost plate (34), a transmission rod (36) is hingedly provided between the vertical rod (341) and the first hinge rod (331), an air inlet pipe (312) is connected to an external heating steam pipeline, an exhaust pipe (313) is connected to an air inlet interface (22), a one-way valve (314) is provided on the air inlet pipe (312), and a one-way valve (315) is provided on the exhaust pipe (313).

3. A steam waste heat recovery device according to claim 1, characterized in that: The exhaust and decompression structure (4) comprises a second shell (41), a decompression chamber (411) is provided on the second shell (41), an air inlet pipe (412) and an exhaust pipe (413) are provided on both sides of the decompression chamber (411), a decompression piston (45) is slidably provided in the decompression chamber (411), a second motor (42) is provided inside the second shell (41), an eccentric rotating rod (421) is provided at the output end of the second motor (42), a position-shifting transmission angle rod (43) is hingedly provided on the eccentric rotating rod (421), a transmission rod (44) is hingedly provided at the bottom of the decompression piston (45), and one end of the position-shifting transmission angle rod (43) is hingedly connected to the bottom of the transmission rod (44).

4. A steam waste heat recovery device according to claim 3, characterized in that: The housing 2 (41) is provided with an adjustment structure, the adjustment structure comprising a motor 3 (46), an eccentric wheel (47) being provided at the output end of the motor 3 (46), an adjustment rod (48) being hingedly provided at the other end of the position-changing transmission angle rod (43), a rotating ring (481) being provided at one end of the adjustment rod (48) for rotationally cooperating with the eccentric wheel (47), and a drainage pipe (417) communicating with the waste water tank (5) being provided at the lowest position of the decompression piston (45) in the decompression chamber (411).

5. A steam waste heat recovery device according to claim 4, characterized in that: Fan wheels (49) are fixedly provided on the eccentric rotating rods (421) on both sides of the shift transmission angle rod (43). When the pressure reducing piston (45) is at the lowest position, the fan surface of the fan wheel (49) faces upward.

6. A steam waste heat recovery device according to claim 3, characterized in that: The second air inlet pipe (412) is connected to the exhaust port (23). The second air inlet pipe (412) and the second exhaust pipe (413) are provided with a check valve (415) and a check valve (416) respectively. The second air inlet pipe (412) is provided with a pressure regulating valve (414) in front of the check valve (415).

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