Circulating water and blow-down water treatment and recycling device and circulating water and blow-down water treatment and recycling method

Abstract

The invention discloses a circulating water and sewage treatment and recycling device and method, and belongs to the technical field of sewage treatment.The circulating water and sewage treatment and recycling device comprises a barrel, a plurality of heat exchange pipes are horizontally, symmetrically and fixedly connected into the barrel, a plurality of circular rings A are symmetrically arranged on the outer walls of the heat exchange pipes, and the circular rings A and the heat exchange pipes are not coaxial; the inner walls of the circular rings A are attached to the outer wall of the heat exchange tube, the circular rings A are fixedly connected to a connecting rod, the ends of the two sides of the connecting rod penetrate out of the circular rings A on the two sides correspondingly, circular rings B are arranged at the ends of the two sides of the connecting rod correspondingly, the diameters of the circular rings B are equal to the diameters of the circular rings A, and the circular rings B and the circular rings A are coaxial. A circular groove with the diameter larger than the outer diameter of the heat exchange tube is formed in the axis of the circular ring A, one side of the heat exchange tube is tightly attached to the circular groove, and the outer wall of the circular ring B is fixedly connected with a plurality of blades symmetrically and fixedly. The heat exchange pipeline can be prevented from generating a deposition layer.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a device and method for treating and reusing circulating water wastewater. Background Technology

[0002] As the core heat exchange unit of a circulating water system, the heat exchanger is responsible for transferring the heat from high-temperature wastewater or process hot fluid to the cooling medium (such as fresh water or recycled water), achieving temperature control and energy recovery, and ensuring the stable operation of subsequent treatment units (such as membrane systems and bioreactors) within a suitable temperature range. During wastewater treatment, since some wastewater has a high temperature, heat exchange can be performed on the recycled water to increase its temperature, facilitating subsequent processes. However, since the recycled water is not completely purified and contains certain impurities, a deposit layer can form on the heat exchange pipes after contact with heat exchange pipes carrying high-temperature wastewater, affecting heat exchange efficiency. A structure that can avoid the formation of a deposit layer is proposed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a device and method for treating and reusing circulating water wastewater, thus solving the aforementioned problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a circulating water wastewater treatment and reuse device and method, comprising a cylindrical body, wherein multiple heat exchange tubes are horizontally and symmetrically fixedly connected within the cylindrical body, and multiple annular rings A are symmetrically arranged on the outer wall of the heat exchange tubes, wherein the annular rings A are not coaxial with the heat exchange tubes, and the inner wall of the annular rings A is attached to the outer wall of the heat exchange tubes. Multiple annular rings A are fixedly connected to a connecting rod, and the two ends of the connecting rod extend through the two annular rings A on both sides. Annular rings B are respectively arranged at the two ends of the connecting rod, wherein the diameter of the annular rings B is equal to that of the annular rings A, and they are coaxial. A circular groove with a diameter larger than the outer diameter of the heat exchange tube is provided at the center of the annular ring A, and one side of the heat exchange tube is tightly attached to the circular groove. Multiple impellers are symmetrically fixedly connected to the outer wall of the annular rings B.

[0005] A further technical solution: The circular groove is provided with a guide assembly for rotating it about the axis of the circular ring A. The guide assembly includes a guide slider and a guide slider B. The guide slider and the guide slider B are slidably disposed on both sides of the circular ring B, and both the guide slider and the guide slider B slide against the outer wall of the circular ring B with the axis of the circular ring B as the fulcrum. The two ends of the connecting rod are fixedly connected to the corresponding guide sliders.

[0006] A further technical solution: A crossbar is fixedly connected to the side of the guide slider B away from the guide slider, and the other end of the crossbar is horizontally slidably connected to the cylinder. A spring is sleeved on the crossbar, and the two ends of the spring are fixedly connected to the guide slider B and the cylinder, respectively.

[0007] A further technical solution: The cylinder is provided with a driving component for making the ring A slide at a uniform speed. The driving component includes an elliptical wheel. Multiple elliptical wheels are provided at the liquid inlet end of the cylinder and are symmetrically fixedly connected to their corresponding frames. Each elliptical wheel has a cam on its side and the cam is fixedly connected to its corresponding ring A. The elliptical wheel pushes the cam to slide laterally during rotation.

[0008] A further technical solution: A shaft is provided at the center of the cylinder, and the frame is fixedly connected to the outer wall of the shaft. One end of the shaft is rotatably connected to the connecting frame, and the other end of the shaft is provided with a flow guiding component.

[0009] A further technical solution: a fan blade is coaxially fixedly connected to the outer wall of the shaft, and the fan blade is located between the connecting frame and the frame. The connecting frame is fixedly connected to the inner wall of the cylinder, and both sides of the cylinder are fixedly connected to a liquid delivery pipe that communicates with multiple heat exchange tubes.

[0010] Further technical solution: The flow guiding component includes inner liner A and inner liner B. Both inner liner A and inner liner B are coaxially arranged on the inner wall of the cylinder, and the outer walls of both inner liner A and inner liner B are attached to the inner wall of the cylinder. The inner liner B is rotatably connected to the cylinder, and the side of the inner liner A opposite to the inner liner B is fixedly connected to the shaft.

[0011] Further technical solution: The inner lining plate A and the inner lining plate B are provided with interconnected fan-shaped through grooves, and the two fan-shaped through grooves have equal areas. The fan-shaped through grooves are provided with multiple through holes that penetrate both sides of them, and the multiple through holes in the same group are located between the two fan-shaped through grooves. The water outlet end of the cylinder is fixedly connected to a filter membrane.

[0012] Beneficial effects This invention provides a device and method for treating and reusing circulating water wastewater, which has the following advantages compared with the prior art: 1. When ring A begins to slide under the action of the drive assembly, since the inner wall of ring A is in contact with the outer wall of the heat exchange tube, even if ring A and the heat exchange tube are not coaxial, it does not affect the normal sliding of ring A. That is, during the sliding process of ring A, it can scrape against the outer wall of the heat exchange tube, thereby removing the deposits attached to the outer wall. In addition, during the sliding process of ring A, it can create a turbulent effect on the recirculated water flowing in the cylinder, thereby further flushing off the deposits on the outer wall of the heat exchange tube. In this process, ring A can drive the two rings B on both sides to slide synchronously, thereby compressing the spring on one side of its movement direction and stretching the spring on the other side, so that it can accumulate elastic potential energy, so as to facilitate... After the guide component stops acting on ring A, multiple rings A can be reset. When ring B slides, because multiple blades are fixedly connected to the outer wall of ring B, when it moves actively, it can accelerate the impact effect of the water flow on it, so that ring B starts to rotate at a constant speed. That is, at this time, ring B does not rotate around the axis of the heat exchange tube. At the same time, because the circular groove at its axis is in close contact with the heat exchange tube, it can periodically strike the outer wall of the heat exchange tube during its rotation, so that the heat exchange tube vibrates and shakes off the sediment attached to its inner wall, so that it can be discharged from the heat exchange tube with the water flow. This avoids the deposition of sediment on the inner wall of the heat exchange tube, which can cause blockage in the heat exchange tube and prevent the high-temperature water from being recycled. 2. After the recycled water is discharged into the cylinder from the inlet, the user should simultaneously discharge the high-temperature wastewater into multiple heat exchange tubes. This allows the recycled water to circulate within the cylinder, exchanging heat through the tubes to raise its temperature. During this process, the impact of the recycled water causes the fan blades to rotate at a constant speed, driving the shaft fixed at its center to rotate synchronously. This, in turn, causes the elliptical wheel to rotate at a constant speed around the cylinder's axis. During this process, the elliptical wheel sequentially contacts multiple cams. Once they contact each other... The elliptical wheel allows the cam to slide along its arc surface, enabling the cam to perform lateral linear interaction within the cylinder. This, in turn, drives multiple rings A to slide laterally on the heat exchange tube. This allows the rings A and the connecting rod to work together to clean the deposits on the outer and inner walls of the heat exchange tube. Furthermore, as the rings A slide, they compress the corresponding springs, accumulating elastic potential energy. This allows the cam to slide back to its original position under the action of the corresponding springs after the elliptical wheel disengages from the cam. As a result, the rings A and the connecting rod can slide back and forth on the heat exchange tube. 3. When the fan blades begin to rotate under the action of water flow, they can drive the inner liner plate A to rotate synchronously. When the inner liner plate A is in its initial position, it is connected to the fan-shaped through grooves on the inner liner plate B. Due to the large size of the multiple fan-shaped through grooves, the recycled water can flow out quickly from between them. As the inner liner plate A rotates, the fan-shaped through grooves on the inner liner plate A and the inner liner plate B intersect, that is, at this time the fan-shaped through grooves on the inner liner plate A are directly opposite the through holes on the inner liner plate B. At this time, the recycled water is discharged through multiple through holes, thereby effectively increasing the flow rate of the recycled water. This allows the deposits scraped off the heat exchange tubes to flow out quickly from between the inner liner plate B and the inner liner plate A. The faster flow rate of the recycled water acts on the filter membrane, which can have a flushing effect on the filter membrane, thereby preventing the deposits from clogging the filter membrane and causing the recycled water to be unable to be discharged. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic cross-sectional view of the present invention.

[0015] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the present invention.

[0016] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the present invention.

[0017] Figure 5 This is a schematic diagram of another cross-sectional structure of the present invention.

[0018] Figure 6 This is a schematic diagram of the inner lining plate structure of the present invention.

[0019] Figure reference numerals: cylinder 101, heat exchange tube 201, ring A 202, connecting rod 203, ring B 204, circular groove 205, guide slider 206, blade 207, guide slider B 208, crossbar 209, spring 301, cam 302, elliptical wheel 303, frame 304, shaft 305, fan blade 306, connecting frame 307, infusion pipe 308, inner liner plate A 309, inner liner plate B 401, fan-shaped through groove 402, through hole 403, filter membrane 404. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0022] Please see Figures 1-6According to one embodiment of the present invention, a circulating water wastewater treatment and reuse device and method includes a cylindrical body 101. Multiple heat exchange tubes 201 are horizontally and symmetrically fixedly connected inside the cylindrical body 101. Multiple circular rings A202 are symmetrically arranged on the outer wall of each heat exchange tube 201. The circular rings A202 are not coaxial with the heat exchange tubes 201, and the inner wall of each circular ring A202 is attached to the outer wall of the heat exchange tubes 201. All the circular rings A202 are fixedly connected to a connecting rod 203. The two ends of the connecting rod 203 extend through the two circular rings A202 on both sides, and the two ends of the connecting rod 203 are respectively provided with a circular ring B204. The circular ring B204 has the same diameter as the circular ring A202 and is coaxial with the circular ring A202. A circular groove 205 with a diameter larger than the outer diameter of the heat exchange tube 201 is provided at the center of the circular ring A202, and one side of the heat exchange tube 201 is tightly attached to the circular groove 205. Multiple blades 207 are symmetrically fixedly connected to the outer wall of the circular ring B204.

[0023] Specifically, the circular groove 205 is provided with a guide assembly for rotating around the axis of the circular ring A202. The guide assembly includes a guide slider 206 and a guide slider B208. The guide slider 206 and the guide slider B208 are slidably disposed on both sides of the circular ring B204, and both the guide slider 206 and the guide slider B208 slide against the outer wall of the circular ring B204 with the axis of the circular ring B204 as the fulcrum. The two ends of the connecting rod 203 are fixedly connected to the corresponding guide slider 206.

[0024] Specifically, a crossbar 209 is fixedly connected to the side of the guide slider B208 away from the guide slider 206, and the other end of the crossbar 209 is horizontally slidably connected to the cylinder 101. A spring 301 is sleeved on the crossbar 209, and the two ends of the spring 301 are fixedly connected to the guide slider B208 and the cylinder 101 respectively.

[0025] In the above embodiment, when the ring A202 begins to slide under the action of the driving component, since the inner wall of the ring A202 is attached to the outer wall of the heat exchange tube 201, even if the ring A202 and the heat exchange tube 201 are not coaxial, it does not affect the normal sliding of the ring A202. That is, during the sliding process of the ring A202, it can scrape the outer wall of the heat exchange tube 201, thereby removing the deposits attached to its outer wall. In addition, during the sliding process of the ring A202, it can create a turbulent effect on the recycle water flowing in the cylinder 101, thereby further causing the recycle water to wash away the deposits on the outer wall of the heat exchange tube 201. In this process, the ring A202 can drive the rings B204 on both sides to slide synchronously, thereby compressing the spring 301 on one side of its moving direction and stretching the spring 301 on the other side, so that it can accumulate elastic potential energy. This allows multiple rings A202 to reset after the guide assembly stops acting on the ring A202. When ring B204 slides, multiple blades 207 are fixedly connected to the outer wall of ring B204. Therefore, when it moves actively, it can accelerate the impact effect of the water flow on it, so that ring B204 starts to rotate at a uniform speed. That is, at this time, ring B204 does not rotate around the axis of heat exchange tube 201. At the same time, since the circular groove 205 at its axis is in close contact with the heat exchange tube 201, it can periodically strike the outer wall of heat exchange tube 201 during its rotation, so that heat exchange tube 201 vibrates and shakes off the sediment attached to its inner wall, so that it can be discharged from heat exchange tube 201 with the water flow. This avoids the deposition of sediment on the inner wall of heat exchange tube 201, which would cause blockage inside heat exchange tube 201 and prevent the high-temperature water from being recycled.

[0026] Specifically, the cylinder 101 is provided with a driving assembly for making the ring A202 slide at a uniform speed. The driving assembly includes elliptical wheels 303. Multiple elliptical wheels 303 are provided at the liquid inlet end of the cylinder 101, and multiple elliptical wheels 303 are symmetrically fixedly connected to their corresponding frames 304. Each elliptical wheel 303 has a cam 302 on its side, and the cam 302 is fixedly connected to its corresponding ring A202. During rotation, the elliptical wheel 303 pushes the cam 302 to slide laterally.

[0027] Specifically, a shaft 305 is provided at the center of the cylinder 101, and the frame 304 is fixedly connected to the outer wall of the shaft 305. One end of the shaft 305 is rotatably connected to the connecting frame 307, and a flow guide assembly is provided at the other end of the shaft 305.

[0028] Specifically, a fan blade 306 is coaxially fixedly connected to the outer wall of the shaft 305, and the fan blade 306 is located between the connecting frame 307 and the frame 304. The connecting frame 307 is fixedly connected to the inner wall of the cylinder 101, and both sides of the cylinder 101 are fixedly connected to an infusion pipe 308 that communicates with multiple heat exchange tubes 201.

[0029] In the above embodiment, after the recycled water is discharged into the cylinder 101 from the inlet end, the user should simultaneously discharge the high-temperature wastewater into multiple heat exchange tubes 201. This allows the recycled water to circulate within the cylinder 101, exchanging heat through the multiple heat exchange tubes 201 to increase its temperature. During this process, the impact of the recycled water causes the fan blades 306 to rotate at a constant speed, driving the shaft 305 fixedly connected to its axis to rotate synchronously. This, in turn, causes the elliptical wheel 303 to rotate at a constant speed around the axis of the cylinder 101. During this process, the elliptical wheel 303 contacts multiple cams 302 sequentially. Once in contact, the elliptical wheel 303 can... The cam 302 is able to slide along its arc surface, allowing it to perform lateral linear interaction within the cylinder 101. This causes multiple rings A202 to slide laterally on the heat exchange tube 201, enabling the rings A202 and the connecting rod 203 to work together to clean the deposits on the outer and inner walls of the heat exchange tube 201. As the rings A202 slide, they compress the corresponding springs 301, accumulating elastic potential energy. This allows the cam 302 to slide back to its original position under the action of the corresponding springs 301 after the elliptical wheel 303 disengages from it. This allows the rings A202 and the connecting rod 203 to slide cyclically on the heat exchange tube 201.

[0030] Specifically, the flow guiding assembly includes an inner liner plate A309 and an inner liner plate B401. The inner liner plate A309 and the inner liner plate B401 are coaxially arranged on the inner wall of the cylinder 101, and the outer walls of the inner liner plate A309 and the inner liner plate B401 are attached to the inner wall of the cylinder 101. The inner liner plate B401 is rotatably connected to the cylinder 101, and the side of the inner liner plate A309 facing away from the inner liner plate B401 is fixedly connected to the shaft 305.

[0031] Specifically, the inner lining plate A309 and the inner lining plate B401 are provided with interconnected fan-shaped through grooves 402, and the two fan-shaped through grooves 402 have equal areas. The fan-shaped through grooves 402 are provided with multiple through holes 403 that penetrate both sides of them, and the multiple through holes 403 in the same group are located between the two fan-shaped through grooves 402. The water outlet end of the cylinder 101 is fixedly connected to a filter membrane 404.

[0032] In the above embodiment, when the fan blade 306 starts to rotate under the action of water flow, it can drive the inner lining plate A309 to rotate synchronously. When the inner lining plate A309 is in the initial position, it is interconnected with the fan-shaped through grooves 402 on the inner lining plate B401. Since the size of the multiple fan-shaped through grooves 402 is large, the recycled water can flow out quickly from them. As the inner lining plate A309 rotates, the fan-shaped through grooves 402 on the inner lining plate A309 and the inner lining plate B401 intersect, that is, at this time the inner lining plate A309 and the inner lining plate B401 are interconnected. The fan-shaped groove 402 on the liner A309 is directly opposite the through hole 403 on the inner liner B401. At this time, the reclaimed water is discharged through multiple through holes 403, which effectively increases the flow rate of the reclaimed water. This allows the deposits scraped off the heat exchange tube 201 to flow out quickly between the inner liner B401 and the inner liner A309. The reclaimed water with a faster flow rate acts on the filter membrane 404, which can have a flushing effect on the filter membrane 404, thereby preventing the deposits from clogging the filter membrane 404 and causing the reclaimed water to be unable to be discharged.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The term "fixed connection" as used in this application refers to a connection in which parts or components are fixed without any relative movement. This includes both detachable and non-detachable connections.

[0035] (1) Detachable connection: Components are fixed together using screws, splines, wedges, etc. This type of connection allows for disassembly during maintenance without damaging the parts. However, the specifications of the connectors used must be correct. (Such as the length of bolts, keys, and wedges), and tighten them properly.

[0036] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxy-acetylene cutting for repair or replacement, these parts generally cannot be reused. Furthermore, during connection, [the following should be noted]: Pay attention to process quality, technical testing, and remedial measures (such as correction, polishing, etc.).

[0037] The sliding connection referred to in this application means that the component can slide along a linear trajectory, and the hinge referred to in this application means that the component can rotate along an axial constraint.

[0038] In some cases, the sliding connection and hinge referred to in this application may also be damped, enabling the component to maintain in the desired position.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating water blowdown water treatment and reuse apparatus, characterized by, The application relates to a heat exchange device, which comprises a cylinder (101), a plurality of heat exchange pipes (201) fixedly and symmetrically connected in the cylinder (101), a plurality of annular rings A (202) symmetrically arranged on the outer wall of the heat exchange pipes (201), wherein the annular rings A (202) are coaxial with the heat exchange pipes (201), the inner wall of the annular rings A (202) is attached to the outer wall of the heat exchange pipes (201), the annular rings A (202) are fixedly connected to connecting rods (203), the two side ends of the connecting rods (203) respectively penetrate the two annular rings A (202), the two side ends of the connecting rods (203) are respectively provided with annular rings B (204), the annular rings B (204) are coaxial with the annular rings A (202) and have the same diameter as the annular rings A (202), the annular rings A (202) are provided with circular grooves (205) with diameters larger than the outer diameter of the heat exchange pipes (201) at the axial center, one side of the heat exchange pipes (201) is attached to the circular grooves (205), and the outer wall of the annular rings B (204) is fixedly connected to a plurality of paddles (207) fixedly and symmetrically connected.

2. The recirculating water blowdown water treatment and reuse apparatus as claimed in claim 1, wherein, The circular grooves (205) are provided with a guide assembly for rotating around the axial center of the annular rings A (202), the guide assembly comprises guide sliding blocks (206) and guide sliding blocks B (208), the guide sliding blocks (206) and the guide sliding blocks B (208) are respectively slidably arranged on the two sides of the annular rings B (204), the guide sliding blocks (206) and the guide sliding blocks B (208) are slidably attached to the outer wall of the annular rings B (204) around the axial center of the annular rings B (204), and the two side ends of the connecting rods (203) are respectively fixedly connected to the corresponding guide sliding blocks (206).

3. The recirculating water blowdown water treatment and reuse apparatus of claim 2, wherein, The side of the guide sliding blocks B (208) away from the guide sliding blocks (206) is fixedly connected to a cross rod (209), the other end of the cross rod (209) is slidably connected to the cylinder (101), a spring (301) is sleeved on the cross rod (209), and the two ends of the spring (301) are fixedly connected to the guide sliding blocks B (208) and the cylinder (101).

4. The recirculating water blowdown water treatment and reuse apparatus as claimed in claim 1, wherein The cylinder (101) is provided with a driving assembly for uniformly sliding the annular rings A (202), the driving assembly comprises elliptical wheels (303), a plurality of the elliptical wheels (303) are arranged at the liquid inlet end of the cylinder (101), a plurality of the elliptical wheels (303) are respectively fixedly connected to corresponding frames (304), the side edges of the elliptical wheels (303) are provided with cams (302), the cams (302) are fixedly connected to the corresponding annular rings A (202), and the elliptical wheels (303) push the cams (302) to slide horizontally in the rotating process.

5. The recirculating water blowdown water treatment and reuse apparatus as claimed in claim 4, wherein, The axial center of the cylinder (101) is coaxially provided with a shaft (305), the frame (304) is fixedly connected to the outer wall of the shaft (305), one end of the shaft (305) is rotatably connected to a connecting frame (307), and the other end of the shaft (305) is provided with a flow guide assembly.

6. The recirculating water blowdown water treatment and reuse apparatus as claimed in claim 5, wherein, The outer wall of the shaft (305) is fixedly connected with a fan blade (306) coaxially, and the fan blade (306) is between a connecting frame (307) and the frame (304), the connecting frame (307) is fixedly connected to the inner wall of the cylinder (101), and the two sides of the cylinder (101) are fixedly connected with infusion tubes (308) communicated with the plurality of heat exchange pipes (201).

7. The recirculating water blowdown water treatment and reuse apparatus as claimed in claim 5, wherein The flow guide assembly comprises an inner lining plate A (309) and an inner lining plate B (401), the inner lining plate A (309) and the inner lining plate B (401) are coaxially arranged on the inner wall of the cylinder (101), and the outer walls of the inner lining plate A (309) and the inner lining plate B (401) are attached to the inner wall of the cylinder (101), the inner lining plate B (401) is rotatably connected with the cylinder (101), and the side of the inner lining plate A (309) away from the inner lining plate B (401) is fixedly connected with the shaft (305).

8. The recirculating water blowdown water treatment and reuse apparatus as claimed in claim 7, wherein, The inner lining plate A (309) and the inner lining plate B (401) are provided with a plurality of through holes (403) penetrating through the two sides of the fan-shaped through groove (402), and a plurality of through holes (403) in the same group are between the two fan-shaped through grooves (402), and the water outlet end of the cylinder (101) is fixedly connected with a filter membrane (404).

9. A method for treating and reusing circulating water blowdown water, characterized by, The method comprises the following steps: S1, in the sliding process of the circular ring A, the outer wall of the heat exchange pipe can be scratched to fall off the deposits attached to the outer wall, and in the sliding process of the circular ring A, the reuse water flowing in the cylinder can be disturbed to further make the reuse water fall off the deposits on the outer wall of the heat exchange pipe; S2, when the circular ring B slides, because the outer wall of the circular ring B is fixedly connected with a plurality of paddles, when it moves actively, the impact effect of the water flow on it can be accelerated; S3, therefore, it can periodically knock on the outer wall of the heat exchange pipe during rotation, so that the heat exchange pipe vibrates to shake off the deposits attached to the inner wall; S4, the reuse water is discharged through a plurality of through holes, thereby effectively increasing the flow rate of the reuse water, so that the deposits scraped off the heat exchange pipe can flow out between the inner lining plate B and the inner lining plate A, and the reuse water with increased flow rate acts on the filter membrane, which can scour the filter membrane, thereby avoiding the filter membrane being blocked by the deposits.

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