Steam recovery device

Abstract

The present application relates to steam turbine technical field and discloses a steam recovery device, including heat exchange component and dispersion component, heat exchange component includes shell, heat exchange tube bundle, staggered baffle, inlet pipe and exhaust pipe, dispersion component includes dispersion pipe and driving part arranged in inlet pipe, dispersion pipe's entrance receives high temperature steam, driving part drives dispersion pipe's outlet swing in shell, the present application drives dispersion pipe outlet swing through driving part, scatters and evenly guides each flow passage section of shell to high temperature steam inhaled, effectively solves the problem of uneven steam distribution and low heat exchange efficiency, simultaneously, combines with negative pressure fan initiative suction and baffle forced direction, significantly improves condensing efficiency, eliminates thermal stress concentration, prolongs equipment service life, and can adapt to unit load fluctuation, guarantees heat exchange stability under variable conditions.

Description

Technical Field

[0001] This invention belongs to the field of steam turbine technology, and specifically relates to a steam recovery device. Background Technology

[0002] Steam turbine shaft seal leakage recovery devices are mainly used in thermal power plants, nuclear power plants, and industrial drive steam turbines. During turbine operation, to prevent high-temperature, high-pressure steam from leaking out from the shaft end, a labyrinth-type shaft seal structure is required. However, relying solely on the throttling effect of the shaft seal itself cannot achieve absolute sealing, and a small amount of steam will still leak from the shaft end. If this leakage is not recovered, it will not only cause loss of working fluid (condensate) and heat waste, reducing the unit's economic efficiency, but it will also enter the bearing housing, causing lubricating oil emulsification and damaging the bearing bushes. At the same time, the leakage of high-temperature steam into the plant will deteriorate the operating environment and corrode equipment. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related art. To this end, embodiments of the invention provide a steam recovery device capable of recovering leaked high-temperature steam.

[0004] The steam recovery device of this invention includes:

[0005] A heat exchange assembly includes a shell, multiple heat exchange tube bundles, multiple baffles, a steam inlet pipe, and an exhaust pipe. The multiple heat exchange tube bundles are arranged in the shell and are U-shaped. The steam inlet pipe and the exhaust pipe are respectively arranged at both ends of the shell. The multiple baffles are arranged alternately on the inner wall of the shell to make the steam flow in a tortuous shape in the shell. A dispersion assembly includes a dispersion tube and a drive component. The dispersion tube is disposed in the steam inlet pipe. The inlet of the dispersion tube is used to receive high-temperature steam. The outlet of the dispersion tube extends into the housing. The outlet of the dispersion tube is connected to the drive component, which is used to drive the outlet of the dispersion tube to swing within the housing.

[0006] By installing a dispersion tube inside the steam inlet pipe and using a driving component to drive the outlet of the dispersion tube to reciprocate within the shell, the high-temperature steam drawn in can be actively dispersed and uniformly guided to various flow sections inside the shell. This effectively solves the problems of uneven steam distribution, easy formation of local accumulation, or flow short circuits in traditional devices, thus significantly improving the utilization rate of the heat exchange tube bundle and the overall condensation efficiency. Secondly, the uniform steam distribution eliminates the thermal stress concentration phenomenon caused by local supercooling or superheating in the tube bundle area, reducing the risk of fatigue damage at the connection between the U-shaped heat exchange tube bundle and the tube sheet, and extending the service life of the core heat exchange components. Furthermore, combined with the staggered baffles inside the shell, the steam flows in a tortuous shape, further enhancing the convective heat transfer effect between the steam and the heat exchange tube bundle, ensuring sufficient condensation of the steam in the shell side.

[0007] In some embodiments, the dispersion tube includes a guide shroud, a transition tube, and a dispersion head connected in sequence. The inlet of the guide shroud is used to receive high-temperature steam. The transition tube is a retractable corrugated hose. The dispersion head is connected to the drive unit.

[0008] In some embodiments, the driving component includes a dispersion motor, a turntable, a driving head, and a rocker arm. The dispersion motor is mounted on the outer wall of the steam inlet pipe, and the output shaft of the dispersion motor passes through the interior of the steam inlet pipe and is connected to the turntable. The driving head is fixed on the turntable. One end of the rocker arm is hinged to the inner wall of the steam inlet pipe. The rocker arm has a limiting groove that cooperates with the driving head, and the other end of the rocker arm is fixedly connected to the dispersion head.

[0009] In some embodiments, the dispersing assembly further includes a mating head and a guide groove. The mating head is connected to the dispersing head, and the guide groove is disposed on the inner wall of the steam inlet pipe. The mating head is slidably disposed in the guide groove. The guide groove is used to guide the dispersing head to swing along a preset trajectory. The guide groove is arc-shaped, and the width of the guide groove is greater than the diameter of the mating head.

[0010] In some embodiments, the heat exchange assembly further includes a negative pressure fan connected to the exhaust pipe, the negative pressure fan being used to generate negative pressure within the housing.

[0011] In some embodiments, the steam recovery device further includes a cleaning assembly disposed on the drain pipe of the housing. The cleaning assembly includes a screen, a cleaning element, and an extruder. The screen is obliquely disposed on the inner wall of the drain pipe. The cleaning element rotatably passes through the center of the screen. The extruder is disposed inside the cleaning element.

[0012] In some embodiments, the cleaning component includes a liquid storage cylinder and a scraper. The liquid storage cylinder is used to contain acidic liquid. The scraper has a hollow structure and is connected to the liquid storage cylinder. The scraper has multiple liquid outlet holes and the outer edge of the scraper is in contact with the inner wall of the drain pipe.

[0013] In some embodiments, the cleaning component further includes a cleaning motor, a drive bevel gear, and an outer bevel gear ring. The cleaning motor is mounted on the outer wall of the drain pipe, the drive bevel gear is connected to the output shaft of the cleaning motor, and the outer bevel gear ring is disposed at the bottom of the outer wall of the liquid storage cylinder, and the outer bevel gear ring meshes with the drive bevel gear.

[0014] In some embodiments, the extruder includes a piston extrusion rod and a positioning frame. The positioning frame is disposed on the inner wall of the drain pipe. The piston extrusion rod is rotatably disposed on the positioning frame and extends into the liquid storage cylinder. A spiral push groove is formed on the outer wall of the piston extrusion rod. A push head is provided at the bottom of the liquid storage cylinder, and the push head slides in cooperation with the spiral push groove.

[0015] In some embodiments, the cleaning assembly further includes a drain pipe connected to the drain pipe, the drain pipe having a cap at its opening, the drain pipe being located above the isolation net, and the drain pipe being used to discharge dirt from the isolation net. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the dispersion component in this invention.

[0019] Figure 4 This is a schematic diagram of the cleaning component in this invention. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the cleaning component in this invention. Figure 2 .

[0021] Figure label: 1. Heat exchanger assembly; 11. Shell; 12. Heat exchanger tube bundle; 13. Baffle plate; 14. Steam inlet pipe; 15. Exhaust pipe; 16. Negative pressure fan; 17. Drain pipe; 18. Water supply components; 181. Front tube box; 182. Tube side baffle; 183. Upper tube box connection; 184. Lower tube box connection; 19. Tube sheet; 2. Dispersion assembly; 21. Dispersion tube; 211. Guide cover; 212. Transition tube; 213. Dispersion head; 22. Drive component; 221. Dispersion motor; 222. Turntable; 223. Drive head; 224. Swing arm; 225. Limiting groove; 23. Mating head; 24. Guide groove; 3. Cleaning components; 31. Isolation net; 32. Cleaning parts; 321. Liquid storage tank; 322. Scraper; 323. Liquid outlet; 324. Cleaning motor; 325. Drive bevel gear; 326. External bevel gear ring; 33. Extruder; 331. Piston extrusion rod; 332. Positioning frame; 333. Spiral push groove; 334. Push head; 34. Drain pipe. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1-5 As shown, the steam recovery device of this embodiment includes a heat exchange component 1 and a dispersion component 2. The heat exchange component 1 is used to recover steam leaking from the shaft seal and the heat it carries, while the dispersion component 2 is used to actively guide and distribute the intake steam to optimize the flow field distribution.

[0024] like Figure 1 and Figure 2 As shown, the heat exchange assembly 1 includes a shell 11, multiple heat exchange tube bundles 12, multiple baffles 13, a steam inlet pipe 14, and an exhaust pipe 15. The multiple heat exchange tube bundles 12 are arranged in the shell 11, and the heat exchange tube bundles 12 are U-shaped. The steam inlet pipe 14 and the exhaust pipe 15 are respectively located at both ends of the shell 11. The multiple baffles 13 are arranged alternately on the inner wall of the shell 11 to cause the steam to flow in a tortuous shape within the shell 11.

[0025] Specifically, the shell 11 is a sealed cylindrical container. The steam inlet pipe 14 is located at one end of the shell 11 to receive high-temperature steam leaking from the turbine shaft seal. The exhaust pipe 15 is located at the other end of the shell 11 to discharge residual non-condensable gases after steam condensation. Multiple heat exchange tube bundles 12 are U-shaped tube bundles, with both ends of the U-shaped tubes fixed to the tube sheet 19 at one end of the shell 11.

[0026] Furthermore, one end of the shell 11 is connected to a water supply component 18 via a tube sheet 19. The water supply component 18 includes a front tube box 181, which is assembled to the end of the shell 11 via a flange structure. A horizontally arranged tube-side baffle 182 is fixed inside the front tube box 181, which divides the interior of the front tube box 181 into an inlet chamber and an outlet chamber. The inlet chamber and the outlet chamber are respectively connected to an upper tube box connector 183 and a lower tube box connector 184, which serve as the inlet and outlet of cooling water, respectively. Both ends of the U-shaped heat exchange tube bundle 12 are fixed to the tube sheet 19 and are respectively connected to the inlet chamber and the outlet chamber, thus forming a complete tube-side circulation path. Cooling water enters the inlet chamber from the upper tube box connector 183, flows through the interior of the U-shaped heat exchange tube bundle 12 to absorb steam heat, enters the outlet chamber, and finally flows out from the lower tube box connector 184.

[0027] Furthermore, multiple baffles 13 are fixed to the inner wall of the shell 11 in an alternating manner. This alternating arrangement forces the high-temperature steam entering the shell side from the steam inlet pipe 14 to flow in an "S"-shaped curve along the axial direction of the shell 11, repeatedly scouring the outer wall of the U-shaped heat exchange tube bundle 12, which greatly enhances the heat exchange effect and prevents the steam from short-circuiting.

[0028] Furthermore, the heat exchange assembly 1 also includes a negative pressure fan 16, which is connected to the exhaust pipe 15. The negative pressure fan 16 is used to generate negative pressure within the casing 11. The negative pressure fan 16 operates continuously, generating and maintaining a stable micro-negative pressure environment within the casing 11. This suction force is transmitted to the turbine shaft seal through the steam inlet pipe 14, actively and continuously drawing leaked steam into the casing 11 for treatment.

[0029] like Figure 1 and Figure 3 As shown, the dispersion assembly 2 includes a dispersion tube 21 and a drive member 22. The dispersion tube 21 is disposed in the steam inlet pipe 14, the inlet of the dispersion tube 21 is used to receive high-temperature steam, and the outlet of the dispersion tube 21 extends into the housing 11. The outlet of the dispersion tube 21 is connected to the drive member 22, which is used to drive the outlet of the dispersion tube 21 to swing within the housing 11.

[0030] The dispersion component of this invention drives the outlet of the dispersion tube to swing inside the shell through a driving component, which can disperse the high-temperature steam drawn in and guide it evenly to each flow section of the shell. This effectively solves the problems of uneven steam distribution, easy formation of local accumulation or flow short circuit in the prior art, thereby significantly improving the utilization rate of the heat exchange tube bundle and the overall condensation efficiency.

[0031] Specifically, such as Figure 3As shown, the dispersion pipe 21 includes a guide shroud 211, a transition pipe 212, and a dispersion head 213 connected in sequence. The inlet of the guide shroud 211 is used to receive high-temperature steam, and the top of the guide shroud 211 is fixed to the inner wall of the steam inlet pipe 14. The transition pipe 212 is a retractable corrugated hose, providing a flexible connection base for subsequent oscillation. The dispersion head 213 serves as the end steam ejection component and is connected to the drive unit 22.

[0032] like Figure 3 As shown, the driving component 22 includes a dispersing motor 221, a turntable 222, a driving head 223, and a swing arm 224. The dispersing motor 221 is mounted on the outer wall of the steam inlet pipe 14, and its output shaft passes through the interior of the steam inlet pipe 14 and is connected to the turntable 222. The driving head 223 is fixed to the outer periphery of the end face of the turntable 222. One end of the swing arm 224 is hinged to the inner wall of the steam inlet pipe 14, and a limiting groove 225 is provided on the swing arm 224 to cooperate with the driving head 223. The other end of the swing arm 224 is fixedly connected to the dispersing head 213. When the dispersing motor 221 is started, the turntable 222 drives the driving head 223 to perform a circular motion. The driving head 223 slides within the limiting groove 225, forcing the swing arm 224 to swing back and forth around its top hinge point, thereby driving the dispersing head 213 to achieve a periodic swinging motion inside the steam inlet pipe 14.

[0033] Furthermore, to further expand the effective range of the dispersing head 213 and the regularity of its oscillation path, the dispersing assembly 2 also includes a mating head 23 and a guide groove 24. The mating head 23 is connected to the dispersing head 213, and the guide groove 24 is disposed on the inner wall of the steam inlet pipe 14. The mating head 23 is slidably disposed within the guide groove 24, which guides the dispersing head 213 to oscillate along a preset trajectory. The guide groove 24 is arc-shaped, and its width is greater than the diameter of the mating head 23, providing sufficient margin and buffer space for oscillation. When the mating head 23 slides within the guide groove 24, it can guide the dispersing head 213 to oscillate with a larger amplitude along the preset trajectory.

[0034] like Figure 1 , Figure 4 , Figure 5 As shown, the steam recovery device of this embodiment of the invention also includes a cleaning component 3, which is installed on the drain pipe 17 of the housing 11. The cleaning component 3 is used to clean the inner wall of the drain pipe 17. The condensate formed after steam condensation collects at the bottom of the housing 11 and is discharged through the connected drain pipe 17, usually sent to the condenser for recycling. After long-term operation, the inner wall of the drain pipe 17 is prone to deposits such as rust, welding slag, and oil. The cleaning component 3 can actively remove these dirt and prevent the drain pipe 17 from becoming clogged.

[0035] Furthermore, the cleaning component 3 includes a screen 31, a cleaning element 32, and an extruder 33. The screen 31 is inclinedly disposed on the inner wall of the drain pipe 17 to intercept larger particulate impurities and prevent them from entering the downstream system. The cleaning element 32 rotatably passes through the center of the screen 31, and the extruder 33 is disposed inside the cleaning element 32.

[0036] Specifically, the cleaning component 32 includes a liquid storage tank 321 and a scraper 322. The liquid storage tank 321 is used to hold an acidic liquid, which can be diluted white vinegar or a special descaling agent. The scraper 322 is hollow and communicates with the liquid storage tank 321, and has multiple liquid outlet holes 323. The outer edge of the scraper 322 is in contact with the inner wall of the conical section of the drain pipe 17. When the scraper 322 rotates, its edge in contact with the inner wall of the drain pipe 17 acts like a scraper, mechanically scraping off loose rust, welding slag, oil, and other deposits attached to the pipe wall.

[0037] Furthermore, a one-way filling port is provided on the top of the outer wall of the liquid storage cylinder 321. This one-way filling port facilitates the replenishment of acidic liquid into the liquid storage cylinder 321 without disassembling the device. A one-way valve can be installed inside the one-way filling port to prevent the acidic liquid from leaking out during device operation.

[0038] Furthermore, the cleaning component 32 also includes a cleaning motor 324, a drive bevel gear 325, and an outer bevel gear ring 326. The cleaning motor 324 is mounted on the outer wall of the drain pipe 17, and the drive bevel gear 325 is connected to the output shaft of the cleaning motor 324. The outer bevel gear ring 326 is located at the bottom of the outer wall of the liquid storage cylinder 321, and the outer bevel gear ring 326 meshes with the drive bevel gear 325. When the cleaning motor 324 is started, the power is transmitted through the meshing of the drive bevel gear 325 and the outer bevel gear ring 326, driving the entire liquid storage cylinder 321 and the scraper 322 fixedly connected to it to rotate together.

[0039] Furthermore, the extruder 33 includes a piston extrusion rod 331 and a positioning frame 332. The positioning frame 332 is disposed on the inner wall of the drain pipe 17, and the piston extrusion rod 331 is rotatably disposed on the positioning frame 332, extending into the liquid storage cylinder 321. A spiral push groove 333 is formed on the outer wall of the piston extrusion rod 331, and a push head 334 is disposed at the bottom of the liquid storage cylinder 321, which slides in engagement with the spiral push groove 333. The piston extrusion rod 331 and the positioning frame 332 are in a rotationally locked relationship—that is, the liquid storage cylinder 321 can rotate relative to the piston extrusion rod 331, but the piston extrusion rod 331 itself will not rotate with the liquid storage cylinder 321.

[0040] Specifically, when the cleaning motor 324 drives the liquid storage cylinder 321 to rotate, the push head 334 at the bottom of the liquid storage cylinder 321 slides along the spiral push groove 333 on the piston extrusion rod 331. Since the piston extrusion rod 331 is locked by the positioning frame 332 and cannot rotate, this relative motion forces the piston extrusion rod 331 to move up and down axially. As the liquid storage cylinder 321 continues to rotate, the piston extrusion rod 331 is gradually pushed into the liquid storage cylinder 321, thereby applying pressure to the acidic liquid inside the liquid storage cylinder 321, forcing it through the internal flow channel of the hollow scraper 322, and finally evenly extruding it from the liquid outlet hole 323 on the surface of the scraper 322, directly applying it to the inner wall of the drain pipe 17. This acidic liquid can chemically react with alkaline or metal oxide dirt such as rust and scale, dissolving and converting them into soluble substances. Combined with the mechanical scraping action of the scraper 322, it achieves synergistic descaling through chemical dissolution and mechanical cleaning.

[0041] Furthermore, the cleaning component 3 also includes a drain pipe 34, which is connected to the drain pipe 17, and a cap is provided at the opening of the drain pipe 34. The drain pipe 34 is located above the isolation net 31 and is used to discharge dirt from the isolation net 31. The cap is closed during normal use and opened during cleaning to discharge dissolved or flushed dirt from the system.

[0042] The following is combined with Figures 1-5 The working process of the steam recovery device according to an embodiment of the present invention will be described in detail.

[0043] First, the negative pressure fan 16 is started, and a stable micro-negative pressure environment is established and maintained inside the casing 11 through the exhaust pipe 15. This negative pressure is transmitted to the steam inlet pipe 14, which actively draws in steam leaking from the turbine shaft seal, continuously drawing high-temperature steam into the interior of the casing 11.

[0044] During the process of steam entering the steam inlet pipe 14, the dispersion motor 221 drives the turntable 222 to rotate. The drive head 223 on the end face of the turntable 222 is driven by the swing rod 224 to drive the dispersion head 213 to swing back and forth in the steam inlet pipe 14. At the same time, the cooperating head 213 slides along the arc-shaped guide groove 24 to expand the swing range, disperse the sucked steam and guide it evenly to each flow section of the shell 11.

[0045] The high-temperature steam entering the shell side flows in an "S"-shaped curve under the forced guidance of the staggered baffles 13, repeatedly scouring the outer wall of the U-shaped heat exchange tube bundle 12. Simultaneously, cooling water enters the inlet chamber from the upper tube box nozzle 183, flows through the interior of the U-shaped heat exchange tube bundle 12, absorbs heat from the steam, enters the outlet chamber, and finally flows out from the lower tube box nozzle 184. After releasing heat, the steam condenses into liquid water, which collects at the bottom of the shell 11 by gravity and is discharged through the drain pipe 17 to the condenser for working fluid recovery. Residual non-condensable gases (mainly air) in the system are continuously extracted by the negative pressure fan 16 through the exhaust pipe 15 and discharged into the atmosphere, thus completing the entire recovery and treatment process of shaft seal leakage steam.

[0046] When cleaning of the drain pipe 17 is required, the cleaning motor 324 installed on the outer wall of the drain pipe 17 is first started. Through the meshing transmission of the drive bevel gear 325 and the outer bevel gear ring 326, the liquid storage cylinder 321 and the hollow scraper 322 fixedly connected to the top of the liquid storage cylinder 321 are rotated together. During the rotation, the scraper 322, with its edge against the inner wall of the conical section of the drain pipe 17, mechanically scrapes away deposits such as rust, welding slag, and oil stains attached to the pipe wall.

[0047] Meanwhile, since the piston extrusion rod 331 is fixed to the inner wall of the drain pipe 17 by the positioning frame 332 and rotated and locked with the liquid storage cylinder 321, the push head 334 at the bottom of the liquid storage cylinder 321 slides relative to the spiral push groove 333 on the outer wall of the piston extrusion rod 331, thereby forcing the piston extrusion rod 331 to gradually advance into the liquid storage cylinder 321 under the drive of rotational motion. The acidic liquid pre-stored in the liquid storage cylinder 321 is evenly extruded from the liquid outlet hole 323 on the surface of the hollow scraper 322 through the internal flow channel of the scraper 322 and applied to the inner wall of the drain pipe 17. The acidic liquid reacts chemically with the residual dirt scraped off by the scraper 322, dissolving alkaline or metal oxide dirt such as rust into soluble substances. The isolation net 31 intercepts larger particles of impurities to prevent them from entering the downstream system. The dissolved dirt is discharged from the system along with the acidic liquid and a small amount of condensate through the drain pipe 34, thereby completing the chemical-mechanical coordinated online or offline cleaning process of the drain pipe 17.

[0048] The steam recovery device of this invention, by setting an active swing-type dispersion component 2 consisting of a dispersion motor 221, a turntable 222, a swing rod 224 and a dispersion head 213 inside the steam inlet pipe 14, and cooperating with the arc-shaped guide groove 24 to guide the swing trajectory, can disperse the high-temperature steam drawn in and guide it evenly to each flow section of the shell 11. This effectively solves the problems of uneven steam distribution, easy formation of local accumulation or flow short circuit in the prior art, thereby significantly improving the utilization rate and overall condensation efficiency of the heat exchange tube bundle 12.

[0049] Secondly, the uniform steam distribution eliminates the thermal stress concentration caused by local overcooling or overheating in the tube bundle area, reduces the risk of fatigue damage at the connection between the U-shaped heat exchange tube bundle 12 and the tube sheet 19, and extends the service life of the core heat exchange components.

[0050] Furthermore, the use of a retractable corrugated hose as the transition pipe 212, combined with the sliding guide structure of the guide groove 24 and the mating head 23, ensures that the reciprocating swing process of the dispersing head 213 is smooth and unobstructed. This not only improves the dynamic reliability of the device operation, but also enables it to adapt to changes in steam flow caused by unit load fluctuations, ensuring the dispersion effect and heat exchange stability under varying operating conditions.

[0051] In addition, the coordinated operation of the negative pressure fan 16 and the dispersion component 2 ensures that the leakage steam from the shaft seal is actively and efficiently captured, while enhancing the condensation rate through uniform heat exchange. This avoids the rise in water level or steam leakage in the casing 11 due to untimely condensation, thereby comprehensively improving the unit's economy, safety and environmental performance.

[0052] Furthermore, by having the scraper 322 driven by the cleaning motor 324 rotate in contact with the inner wall of the conical section of the drain pipe 17, it can actively and comprehensively remove deposits such as rust, welding slag, and oil stains adhering to the pipe wall, completely solving the drawback of traditional static drain pipes that rely solely on gravity for sewage discharge and are unable to remove stubborn dirt. When the liquid storage cylinder 321 rotates, it pushes the head 334 to move relative to the spiral groove 333 of the piston extrusion rod 331, forcing the piston extrusion rod 331 to rise and fall, thereby automatically and quantitatively extruding acidic liquid. This liquid is then precisely applied to the cleaning interface through the hollow internal flow channel and liquid outlet 323 of the scraper 322, achieving synergistic descaling through mechanical scraping and chemical dissolution. The isolation net 31 effectively intercepts large particles of impurities, preventing them from entering the downstream drainage system and causing secondary blockages, ensuring the smooth flow of the entire drainage pipeline.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A steam recovery device, characterized in that, include: The heat exchange assembly (1) includes a shell (11), multiple heat exchange tube bundles (12), multiple baffles (13), a steam inlet pipe (14), and an exhaust pipe (15). The multiple heat exchange tube bundles (12) are arranged in the shell (11). The heat exchange tube bundles (12) are U-shaped. The steam inlet pipe (14) and the exhaust pipe (15) are respectively arranged at both ends of the shell (11). The multiple baffles (13) are arranged alternately on the inner wall of the shell (11) so that the steam flows in a bent shape in the shell (11). The dispersion assembly (2) includes a dispersion tube (21) and a drive member (22). The dispersion tube (21) is disposed in the steam inlet pipe (14). The inlet of the dispersion tube (21) is used to receive high-temperature steam. The outlet of the dispersion tube (21) extends into the housing (11). The outlet of the dispersion tube (21) is connected to the drive member (22). The drive member (22) is used to drive the outlet of the dispersion tube (21) to swing in the housing (11).

2. The steam recovery device according to claim 1, characterized in that, The dispersion tube (21) includes a guide cover (211), a transition tube (212) and a dispersion head (213) connected in sequence. The inlet of the guide cover (211) is used to receive high-temperature steam. The transition tube (212) is a retractable corrugated hose. The dispersion head (213) is connected to the drive unit (22).

3. The steam recovery device according to claim 2, characterized in that, The driving component (22) includes a dispersing motor (221), a turntable (222), a driving head (223), and a rocker arm (224). The dispersing motor (221) is mounted on the outer wall of the steam inlet pipe (14). The output shaft of the dispersing motor (221) passes through the inside of the steam inlet pipe (14) and is connected to the turntable (222). The driving head (223) is fixed on the turntable (222). One end of the rocker arm (224) is hinged to the inner wall of the steam inlet pipe (14). The rocker arm (224) has a limiting groove (225) that cooperates with the driving head (223). The other end of the rocker arm (224) is fixedly connected to the dispersing head (213).

4. The steam recovery device according to claim 3, characterized in that, The dispersing component (2) further includes a mating head (23) and a guide groove (24). The mating head (23) is connected to the dispersing head (213). The guide groove (24) is disposed on the inner wall of the steam inlet pipe (14). The mating head (23) is slidably disposed in the guide groove (24). The guide groove (24) is used to guide the dispersing head (213) to swing along a preset trajectory. The guide groove (24) is arc-shaped and its width is greater than the diameter of the mating head (23).

5. The steam recovery device according to claim 1, characterized in that, The heat exchange assembly (1) also includes a negative pressure fan (16), which is connected to the exhaust pipe (15) and is used to generate negative pressure in the housing (11).

6. The steam recovery device according to claim 1, characterized in that, It also includes a cleaning component (3), which is disposed on the drain pipe (17) of the housing (11). The cleaning component (3) includes a mesh (31), a cleaning element (32), and an extruder (33). The mesh (31) is obliquely disposed on the inner wall of the drain pipe (17). The cleaning element (32) is rotatably disposed through the center of the mesh (31). The extruder (33) is disposed inside the cleaning element (32).

7. The steam recovery device according to claim 6, characterized in that, The cleaning component (32) includes a liquid storage cylinder (321) and a scraper (322). The liquid storage cylinder (321) is used to contain acidic liquid. The scraper (322) is hollow and communicates with the liquid storage cylinder (321). The scraper (322) has multiple liquid outlet holes (323). The outer edge of the scraper (322) is in contact with the inner wall of the drain pipe (17).

8. The steam recovery device according to claim 7, characterized in that, The cleaning component (32) also includes a cleaning motor (324), a drive bevel gear (325), and an outer bevel gear ring (326). The cleaning motor (324) is installed on the outer wall of the drain pipe (17). The drive bevel gear (325) is connected to the output shaft of the cleaning motor (324). The outer bevel gear ring (326) is located at the bottom of the outer wall of the liquid storage cylinder (321). The outer bevel gear ring (326) meshes with the drive bevel gear (325).

9. The steam recovery device according to claim 8, characterized in that, The extruder (33) includes a piston extrusion rod (331) and a positioning frame (332). The positioning frame (332) is disposed on the inner wall of the drain pipe (17). The piston extrusion rod (331) is rotatably disposed on the positioning frame (332). The piston extrusion rod (331) extends into the liquid storage cylinder (321). A spiral push groove (333) is provided on the outer wall of the piston extrusion rod (331). A push head (334) is provided at the bottom of the liquid storage cylinder (321). The push head (334) slides in cooperation with the spiral push groove (333).

10. The steam recovery device according to claim 6, characterized in that, The cleaning component (3) also includes a drain pipe (34), which is connected to the drain pipe (17). The drain pipe (34) is provided with a cap at the opening of the drain pipe (34). The drain pipe (34) is located on the upper side of the isolation net (31). The drain pipe (34) is used to discharge the dirt on the isolation net (31).

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