Spiral winding pipe array type heat exchanger

Abstract

The invention relates to the technical field of spiral pipe type heat exchangers, in particular to a spiral winding pipe array type heat exchanger which comprises a heat exchanger shell, a shell flange is fixedly connected to the top of the heat exchanger shell, and fixing covers are fixedly connected to the two sides of the heat exchanger shell. A plurality of heat exchange holes are formed in the surface of the fixed cover, and heat exchange pipes are fixedly connected into the heat exchange holes; the side, away from the heat exchanger shell, of the fixed cover is fixedly connected with a descaling unit. The electromagnetic field generated by the electromagnet can change the characteristics of ions in water, slow down the deposition velocity of calcium carbonate and magnesium carbonate and reduce the formation of water scales, the electromagnetic field can be changed when the electromagnet moves irregularly, and the formation of the water scales can be further reduced through the change of the electromagnetic field; the coverage range of the electromagnetic field is larger; the electromagnet generates suction force, impurities in water are adsorbed on the surface of the electromagnet, part of impurities in the water can be reduced, and subsequent treatment of the water is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of spiral tube heat exchangers, in particular to a spirally wound tube array heat exchanger. Background Art

[0002] Compared with ordinary shell-and-tube heat exchangers, spirally wound tube heat exchangers have incomparable advantages. They are applicable to a wide temperature range, adapt to thermal shock, eliminate thermal stress by themselves, and are highly compact. Due to their special structure, the fluid is fully diffused and there is no dead zone. However, the heat exchange tubes of spirally wound tube heat exchangers are alternately wound in the form of spiral lines, which makes the structure complex, the cost high, and maintenance more troublesome. Taking into account that the heat exchange tubes of a spirally wound tube heat exchanger are usually intertwined, a larger heat exchange area can be provided during use, resulting in higher heat exchange efficiency. However, after long-term use, scale will inevitably form in the heat exchanger. When water flows in the spiral tube, the centrifugal force will cause the water on the outer side of the heat exchange tube to flow faster and the water on the inner side to flow slower, which will make it easier for scale to form on the inner side of the heat exchange tube. When scale forms in the heat exchange tube, it will not only cause the water flow rate to decrease, resulting in a decrease in heat exchange efficiency, but also because the heat exchange tubes are entangled with each other, it will take a lot of time to disassemble the heat exchange tube, and the equipment will no longer be able to be used during maintenance, which will also cause heat exchange stagnation. Summary of the Invention

[0003] The object of the present invention is to provide a spirally wound tube array heat exchanger to solve the problems raised in the above background technology.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a spirally wound tube array heat exchanger, comprising a heat exchanger shell, a shell flange fixedly connected to the top of the heat exchanger shell, and fixed covers fixedly connected to both sides of the heat exchanger shell; a plurality of heat exchange holes are opened on the surface of the fixed cover, and heat exchange tubes are fixedly connected to each of the heat exchange holes; a descaling unit is fixedly connected to the side of the fixed cover away from the heat exchanger shell, a heat exchange side cover is fixedly connected to the side of the fixed cover away from the heat exchanger shell, and a side cover flange is fixedly connected to the side of the heat exchange side cover away from the fixed cover, and the side cover flange close to the descaling unit is a water inlet; The descaling unit includes a conductive block, which is fixedly connected to a fixed cover. A fixed groove is provided on the surface of the conductive block, and a conductive frame is fixedly connected in the fixed groove. A plurality of connecting wires are fixedly connected to a side of the conductive frame close to the fixed cover. The ends of the connecting wires away from the conductive frame are fixedly connected to conductive wires. The ends of the conductive wires away from the conductive frame are in a free state, and a plurality of electromagnets are fixedly connected to the conductive wires.

[0005] Furthermore, the inner surface of the heat exchange tube is covered with a polytetrafluoroethylene coating, and the surface of the electromagnet is covered with a polytetrafluoroethylene coating.

[0006] Furthermore, a side of the conductive block close to the side cover flange is an arc surface, and a plurality of water holes are provided on the surface of the conductive frame.

[0007] Furthermore, the inner walls on both sides of the heat exchanger shell are slidably connected with buffer units, and the buffer units include multiple buffer rings and push blocks. The push blocks are sealed and slidably connected to the heat exchanger shell, and the push blocks are fixedly connected to the buffer rings. The outer wall of the push block near the top is fixedly connected to a limiting plate, and the side of the limiting plate close to the buffer ring is fixedly connected to a return spring, and the end of the return spring away from the limiting plate is fixedly connected to the outer wall of the heat exchanger shell; the buffer ring is located inside the heat exchanger shell.

[0008] Furthermore, a plurality of brackets are fixedly connected to the surface of the heat exchanger housing close to the push block, a power generation unit is fixedly connected to the side close to the brackets, and the end of the push block away from the buffer ring is slidably connected to the power generation unit.

[0009] Furthermore, the side of the buffer ring away from the heat exchanger shell is recessed inwards, and the surface is arc-shaped.

[0010] Furthermore, a buffer pad is fixedly connected to the inner wall of the heat exchanger shell, and the buffer pad is made of heat insulating material.

[0011] Furthermore, gaskets are fixedly connected to adjacent surfaces of the heat exchange tubes.

[0012] The present invention has the following beneficial effects: 1. The present invention generates an electromagnetic field through an electromagnet, which can change the characteristics of ions in water, slow down the deposition rate of calcium carbonate and magnesium carbonate, and reduce the formation of scale. When the electromagnet moves irregularly, the electromagnetic field will also change, which can further reduce the formation of scale through the change of the electromagnetic field and also make the coverage of the electromagnetic field larger; the electromagnet generates suction and adsorbs impurities in the water on the surface of the electromagnet, which can reduce some impurities in the water and make subsequent treatment of the water more convenient.

[0013] 2. In the present invention, when water flows through the water holes, turbulence will be generated at the bottom of the conductive frame. At this time, the water flow will fluctuate, which can make the magnetic field generated by the electromagnet swing, making the magnetic field more variable, thereby making it more difficult for scale to form, and further increasing the range of the magnetic field, so that the number of electromagnets can be reduced, reducing production costs; when the water flows, the conductive wire will always remain in the middle of the heat exchange tube, and the amplitude of the conductive wire swing will be reduced, thereby avoiding a large collision between the electromagnet and the heat exchange tube.

[0014] 3. The buffer ring of the present invention will push the water flow inward and reduce the occurrence of vortices when pushing, preventing the vortex from rubbing the fixed cover and the heat exchanger shell, thereby increasing the service life of the equipment; when the buffer ring pushes the water flow, it can also exchange the water flow, so that part of the water flow that has not undergone heat exchange comes into contact with the heat exchange tube and exchanges heat, thereby increasing the energy utilization rate; by pushing the block to enable the power generation unit to generate electricity, the electricity produced by the power generation unit can be stored and provided to the electromagnet for supplementary energy supply, which can reduce the external input electricity and thus reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the entire interior of the present invention (excluding the heat exchange tubes); Figure 3 For the present invention Figure 2 A partial enlarged view of the middle part; Figure 4 This is a schematic diagram of the overall structure of the present invention; Figure 5 This is a schematic diagram of the winding state of the heat exchange tube of the present invention; Figure 6 This is a structural diagram of the heat exchange tube of the present invention; Figure 7 This is a structural diagram of the descaling unit of the present invention; Figure 8 This is a structural diagram of the connecting wire, conductive wire and electromagnet of the present invention; Figure 9 This is a structural diagram of the buffer unit of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Heat exchanger shell; 11. Shell flange; 12. Heat exchange side cover; 13. Side cover flange; 14. Fixed cover; 15. Heat exchange tube; 151. Gasket; 16. Buffer pad; 2. Descaling unit; 21. Conductive block; 22. Conductive frame; 23. Connecting wire; 24. Conductive wire; 25. Electromagnet; 3. Buffer unit; 31. Buffer ring; 32. Push block; 33. Power generation unit; 34. Bracket; 35. Return spring. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1-9 As shown, the present invention is a spirally wound tube array heat exchanger, comprising a heat exchanger shell 1, a shell flange 11 being fixedly connected to the top of the heat exchanger shell 1, and a fixed cover 14 being fixedly connected to both sides of the heat exchanger shell 1; a plurality of heat exchange holes are opened on the surface of the fixed cover 14, and heat exchange tubes 15 are fixedly connected to each of the heat exchange holes; a descaling unit 2 is fixedly connected to the side of the fixed cover 14 away from the heat exchanger shell 1, a heat exchange side cover 12 is fixedly connected to the side of the fixed cover 14 away from the heat exchanger shell 1, and a side cover flange 13 is fixedly connected to the side of the heat exchange side cover 12 away from the fixed cover 14, and the side cover flange 13 close to the descaling unit 2 is a water inlet; The descaling unit 2 includes a conductive block 21, which is fixedly connected to the fixed cover 14. A fixed groove is provided on the surface of the conductive block 21, and a conductive frame 22 is fixedly connected to the fixed groove. A side of the conductive frame 22 close to the fixed cover 14 is fixedly connected to a plurality of connecting wires 23, and the ends of the connecting wires 23 away from the conductive frame 22 are fixedly connected to conductive wires 24. The ends of the conductive wires 24 away from the conductive frame 22 are in a free state, and a plurality of electromagnets 25 are fixedly connected to the conductive wires 24.

[0020] In this embodiment, considering that the heat exchange tubes 15 of the spirally wound tube heat exchanger are usually intertwined, a larger heat exchange area can be provided during use, thereby improving the heat exchange efficiency. However, after long-term use, scale is inevitably formed in the heat exchanger. When water flows in the spiral tube, the water on the outer side of the heat exchange tube 15 flows faster and the water on the inner side flows slower due to the influence of centrifugal force, which makes it easier for scale to form on the inner side of the heat exchange tube 15. When scale forms in the heat exchange tube 15, not only the water flow rate is reduced, resulting in reduced heat exchange efficiency, but also because the heat exchange tubes 15 are entangled with each other, it takes a lot of time to disassemble the heat exchange tube 15, and the equipment will be unable to continue to be used during maintenance, which will also cause heat exchange stagnation. During heat exchange, hot and cold water first enter through the shell flange 11 and the side cover flange 13 respectively. The water entering the side cover flange 13 will enter the heat exchange tube 15 through the heat exchange holes on the fixed cover 14. Since the heat exchange tubes 15 are spiral and intertwined, during the heat exchange process, the water entering through the shell flange 11 will flow in the gaps between the heat exchange tubes 15 and exchange heat with the water in the heat exchange tubes 15. During the heat exchange process, the flow of water will push the electromagnet 25 to move when passing through the electromagnet 25. At this time, the electromagnet 25 will move along the water flow, and turbulence will be generated when the water flows through the electromagnet 25. When turbulence is formed, it will push the electromagnet 25 to move. At this time, the electromagnet 25 will be affected by the turbulence around it and float in the middle of the heat exchange tube 15. The turbulence can make the electromagnet 25 move irregularly in the heat exchange tube 15. At this time, by energizing the conductive block 21, the conductive block 21 will guide the current through the conductive frame 22 to the connecting wire 23. At this time, the connecting wire 23 will conduct electricity to the conductive wire 24. When the conductive wire 24 is energized, it will also energize the electromagnet 25. At this time, the electromagnet 25 will generate an electromagnetic field. When water passes through the electromagnet 25, the electromagnetic field can change the characteristics of the ions in the water, thereby slowing down the deposition rate of calcium carbonate and magnesium carbonate and changing the physical properties during deposition, thereby reducing the formation of scale. The method of reducing scale by the electromagnet 25 does not require dismantling the equipment, which reduces the time required for dismantling the equipment, and uses an elastic cleaning brush to fit the wall of the heat exchange tube 15 when cleaning. However, if the cleaning brush is of different sizes from the heat exchange tube 15, the cleaning brush can only clean the outer wall of the heat exchange tube 15 due to its elasticity, resulting in a cleaning dead angle. Compared with the method of removing scale with a chemical solution, the generation of scale can be reduced during the heat exchange process, and no pollution will be generated, and no corrosion will be caused to the heat exchange tube 15. At the same time, the chemical solution needs to react with the scale in the heat exchange tube 15 for a long time, which will also take a lot of time. During this process, the heat exchanger cannot be used, affecting the heat exchange efficiency. Reducing scale by the electromagnet 25 not only can remove scale during the use of the equipment, but the electromagnetic field range generated by the electromagnet 25 is uniform, and no dead angle will be generated. When the electromagnet 25 moves irregularly through turbulence, the electromagnetic field will also change, which can not only further reduce the formation of scale through the change of the electromagnetic field, but also expand the coverage of the electromagnetic field; the electromagnet 25 generates suction and adsorbs impurities in the water on the surface of the electromagnet 25, thereby removing some impurities in the water and reducing some impurities in the water, making subsequent treatment of the water more convenient.

[0021] When water flows outside the heat exchange tubes 15, due to the small gaps between the heat exchange tubes 15, the water flow will change from slow to fast when passing through the heat exchange tubes 15. In addition, since the streamlines of the water flow are not straight, the direction and flow rate change greatly when the water flows through, turbulence will be formed. When turbulence is formed, the water will fluctuate, and the fluctuations of the water will cause the heat exchange tubes 15 to vibrate. When the heat exchange tubes 15 vibrate, the water flow inside the heat exchange tubes 15 can be vibrated synchronously. At this time, the deposition rate of calcium carbonate and magnesium carbonate can be further slowed down, thereby reducing the formation of scale.

[0022] Specifically, the inner surface of the heat exchange tube 15 is covered with a polytetrafluoroethylene coating, and the surface of the electromagnet 25 is also covered with a polytetrafluoroethylene coating.

[0023] In this embodiment, the electromagnet 25 may make irregular movements under the influence of turbulence, which may cause the electromagnet 25 to repeatedly collide and rub against the inner wall of the heat exchange tube 15. After long-term use, both the electromagnet 25 and the heat exchange tube 15 may be damaged, which may cause the electromagnet 25 to leak electricity or the heat exchange tube 15 to leak liquid. Since polytetrafluoroethylene is wear-resistant, by coating the surfaces of the heat exchange tube 15 and the electromagnet 25 with polytetrafluoroethylene coating, the service life of the heat exchange tube 15 and the electromagnet 25 can be extended. At the same time, polytetrafluoroethylene has a low friction coefficient, which can also reduce resistance when the heat exchange tube 15 and the electromagnet 25 rub against each other, not only extending the service life, but also preventing the electromagnet 25 from being unable to move due to excessive friction. Since polytetrafluoroethylene is corrosion-resistant, when heat exchange with corrosive liquids is required, corrosion of the heat exchange tube 15 and the electromagnet 25 can also be avoided. Since polytetrafluoroethylene is a hydrophobic material, it can prevent water from entering the electromagnet 25 during use and causing damage. Since polytetrafluoroethylene has extremely low surface tension and hardly sticks to any substance, it will not form scale on the surface during use, thereby avoiding the formation of scale. At the same time, when the electromagnet 25 generates suction to absorb impurities in the water, the impurities will not adhere to the surface of the electromagnet 25. When the impurities need to be removed, the electromagnet 25 can be simply turned off to make the impurities fall off.

[0024] Specifically, the side of the conductive block 21 close to the side cover flange 13 is an arc surface, and a plurality of water holes are formed on the surface of the conductive frame 22 .

[0025] In this embodiment, considering that the water flows in through the side cover flange 13, when the water flows in, it will flow toward the heat exchange tube 15. When the water flows into the heat exchange tube 15, the flow of the water will also cause the connecting wire 23 and the conductive wire 24 to swing; When water flows in through the side cover flange 13, it will flow evenly to the surroundings through the curved surface of the conductive block 21. At this time, the water will flow into the heat exchange tube 15 through the water holes on the conductive frame 22. When the water flows through the water holes, turbulence will be generated at the bottom of the conductive frame 22. At this time, the water flow will fluctuate, and the fluctuation will cause the connecting wire 23 to swing. When the connecting wire 23 swings, the conductive wire 24 and the electromagnet 25 will swing along. At this time, the magnetic field generated by the electromagnet 25 will also swing. The swing of the magnetic field can make the magnetic field more variable, making it more difficult to form scale, and can further increase the range of the magnetic field, so that the number of electromagnets 25 can be reduced, reducing production costs. Since the water flow is faster when entering the heat exchange tube 15, and the water flows into the heat exchange tube 15 from all sides, when the water flows, the conductive wire 24 will always remain in the middle of the heat exchange tube 15 and reduce the swing amplitude of the conductive wire 24, thereby avoiding a large collision between the electromagnet 25 and the heat exchange tube 15.

[0026] Specifically, the inner walls on both sides of the heat exchanger shell 1 are slidably connected with buffer units 3, and the buffer units 3 include multiple buffer rings 31 and push blocks 32. The push blocks 32 are sealed and slidably connected to the heat exchanger shell 1, and the push blocks 32 are fixedly connected to the buffer rings 31. The outer wall of the push block 32 near the top is fixedly connected to a limiting plate, and a reset spring 35 is fixedly connected to the side of the limiting plate near the buffer ring 31. The end of the reset spring 35 away from the limiting plate is fixedly connected to the outer wall of the heat exchanger shell 1; the buffer ring 31 is located inside the heat exchanger shell 1.

[0027] In this embodiment, considering that the housing flange 11 is disposed on the circumferential surface of the heat exchanger housing 1, it is inevitable that the internal water flow will contact the fixed cover 14 during heat exchange. When the high-speed water flow contacts the fixed cover 14, a vortex is generated at the junction of the fixed cover 14 and the heat exchanger housing 1. Once generated, the vortex will continuously rotate and repeatedly rub against the fixed cover 14 and the heat exchanger housing 1. Over time, the fixed cover 14 and the heat exchanger housing 1 may be damaged to varying degrees due to friction, and the sealing between the fixed cover 14 and the heat exchanger housing 1 may be affected. When the water flow generates a vortex at the junction of the fixed cover 14 and the heat exchanger shell 1, the water flow will push the buffer ring 31 to move. When the buffer ring 31 moves, the pushing block 32 will move. When the pushing block 32 moves, it will pull the reset spring 35 to move. At this time, the reset force of the reset spring 35 can reset the pushing block 32 and the buffer ring 31. At this time, the buffer ring 31 will push the water flow inward and reduce the occurrence of vortexes when pushing, preventing the vortex from rubbing the fixed cover 14 and the heat exchanger shell 1, thereby increasing the service life of the equipment; when the buffer ring 31 pushes the water flow, it can also exchange the water flow, so that part of the water flow that has not undergone heat exchange can contact the heat exchange tube 15 and exchange heat, thereby increasing energy utilization.

[0028] Specifically, a plurality of brackets 34 are fixedly connected to the surface of the heat exchanger shell 1 close to the push block 32 , a power generation unit 33 is fixedly connected to the adjacent side of the brackets 34 , and the end of the push block 32 away from the buffer ring 31 is slidably connected to the power generation unit 33 .

[0029] In this embodiment, it is considered that after the buffer ring 31 pushes the water flow to exchange, the water flow will refill and push the buffer ring 31 outward again, at this time, the buffer ring 31 and the push block 32 will perform high-frequency reciprocating motion; The setting of the power generation unit 33 can receive excess thrust when the push block 32 moves outward, and the power generation rotor can be rotated through the devices in the power generation unit 33, such as the piston and the crank disc, and generate electrical energy by cutting the magnetic lines of force. Since the power generation unit 33 produces less electrical energy and is intermittent, the electrical energy produced by the power generation unit 33 can be stored and provided to the electromagnet 25 for supplementary energy supply, which can reduce the external input electrical energy and thus reduce energy consumption.

[0030] Specifically, the side of the buffer ring 31 away from the heat exchanger shell 1 is concave inward, and the surface is arc-shaped.

[0031] In this embodiment, the buffer ring 31 is in continuous contact with the water flow, and the water flow has a certain impact force when in contact with the buffer ring 31. This may cause the surface of the buffer ring 31 to wear after long-term use, and may cause the water flow to form vortices on the surface of the buffer ring 31, further accelerating the wear of the buffer ring 31. By designing the buffer ring 31 to be recessed inward on one side away from the heat exchanger shell 1 and having an arc-shaped surface, when the water flow contacts the buffer ring 31, it will flow on the arc surface and reduce direct collision with the water flow, thereby reducing damage to the buffer ring 31 caused by the water flow. When the two streams of water collide in the arc-shaped recess in the buffer ring 31, the outward thrust of the buffer ring 31 will be greater, thereby enabling the power generation unit 33 to have a greater power generation capacity, further reducing the external input electrical energy, and reducing energy consumption.

[0032] Specifically, a buffer pad 16 is fixedly connected to the inner wall of the heat exchanger shell 1, and the buffer pad 16 is made of heat insulating material.

[0033] In this embodiment, it is considered that when the water flow is too fast, the strong pressure of the water flow may cause the heat exchange tube 15 to vibrate violently, and may cause the outermost heat exchange tube 15 to collide with the heat exchanger shell 1. When the collision occurs, the heat exchange tube 15 may be deformed, resulting in damage to the heat exchange tube 15. The deformation of the heat exchange tube 15 may make subsequent disassembly more troublesome, which increases the time consumption of maintenance. By arranging a buffer pad 16 on the inner wall of the heat exchanger shell 1, the heat exchange tube 15 can be in contact with the buffer pad 16 when it shakes, and the buffer pad 16 can cushion the heat exchange tube 15 and absorb part of the kinetic energy of the heat exchange tube 15, thereby slowing down the shaking of the heat exchange tube 15 to prevent damage caused by collision between the heat exchange tube 15 and the heat exchanger shell 1; since the buffer pad 16 is made of insulating material, the thermal insulation of the buffer pad 16 can reduce heat loss when the equipment is exchanging heat, thereby making energy utilization more efficient and saving energy at the same time.

[0034] Specifically, gaskets 151 are fixedly connected to adjacent surfaces of the heat exchange tubes 15 .

[0035] In this embodiment, it is considered that when water flows through the heat exchange tubes 15, the heat exchange tubes 15 will vibrate due to turbulence. Since the heat exchange tubes 15 are entangled with each other, the heat exchange tubes 15 may collide with each other during vibration. Since the heat exchange tubes 15 are relatively close to each other, after a long period of collision, the surface of the heat exchange tubes 15 will be concave and convex will be formed inside the heat exchange tubes 15. This will cause the water flow rate to decrease, thereby reducing the heat exchange efficiency. The provision of the gasket 151 can provide a buffer when collisions occur between the heat exchange tubes 15, thereby preventing damage to the heat exchange tubes 15 caused by collisions. At the same time, the provision of the gasket 151 can make the turbulence generated when the water flows through greater, thereby increasing the vibration frequency of the heat exchange tube 15. When the vibration frequency of the heat exchange tube 15 increases, the contact with the water flow will increase, the heat exchange efficiency will be increased, and the water flow will have greater fluidity during heat exchange, so that the water flow can contact more heat exchange tubes 15, which not only increases the heat exchange efficiency, but also increases energy utilization.

[0036] When using, First, during heat exchange, hot and cold water enter through the shell flange 11 and the side cover flange 13 respectively. The water entering the side cover flange 13 will enter the heat exchange tube 15 through the heat exchange holes on the fixed cover 14. Since the heat exchange tubes 15 are spiral and intertwined, during the heat exchange process, the water entering through the shell flange 11 will flow through the gaps between the heat exchange tubes 15 and exchange heat with the water in the heat exchange tubes 15. When water flows outside the heat exchange tubes 15, due to the small gaps between the heat exchange tubes 15, the water flow will change from slow to fast when passing through the heat exchange tubes 15. In addition, due to the non-straight streamlines of the water flow, the direction and flow rate change greatly when the water flows through, thus forming turbulence. When turbulence is formed, the water will fluctuate, and the fluctuations in the water will cause the heat exchange tubes 15 to vibrate. When the heat exchange tubes 15 vibrate, the water flow inside the heat exchange tubes 15 will vibrate synchronously, which can further slow down the deposition rate of calcium carbonate and magnesium carbonate, thereby reducing the formation of scale. By arranging a buffer pad 16 on the inner wall of the heat exchanger shell 1, the heat exchange tube 15 can be in contact with the buffer pad 16 when it shakes, and the buffer pad 16 can cushion the heat exchange tube 15 and absorb part of the kinetic energy of the heat exchange tube 15, thereby slowing down the shaking of the heat exchange tube 15 to prevent damage caused by collision between the heat exchange tube 15 and the heat exchanger shell 1; since the buffer pad 16 is made of insulating material, the thermal insulation of the buffer pad 16 can reduce heat loss when the equipment is exchanging heat, thereby making energy utilization more efficient and saving energy at the same time.

[0037] Secondly, when water flows in through the side cover flange 13, it will flow evenly to the surroundings through the curved surface of the conductive block 21. At this time, the water will flow into the heat exchange tube 15 through the water holes on the conductive frame 22. When the water flows through the water holes, turbulence will be generated at the bottom of the conductive frame 22. At this time, the water flow will fluctuate, and the fluctuation will cause the connecting wire 23 to swing. When the connecting wire 23 swings, the conductive wire 24 and the electromagnet 25 will swing along. At this time, the magnetic field generated by the electromagnet 25 will also swing. The swing of the magnetic field can make the magnetic field more variable, making it more difficult to form scale, and can further increase the range of the magnetic field, so that the number of electromagnets 25 can be reduced, reducing production costs. Since the water flow is faster when entering the heat exchange tube 15, and the water flows into the heat exchange tube 15 from all sides, when the water flows, the conductive wire 24 will always remain in the middle of the heat exchange tube 15, and the amplitude of the swing of the conductive wire 24 will be reduced, thereby avoiding a large collision between the electromagnet 25 and the heat exchange tube 15. During the heat exchange process, the flow of water will push the electromagnet 25 to move when passing through the electromagnet 25. At this time, the electromagnet 25 will move along the water flow, and turbulence will be generated when the water flows through the electromagnet 25. When turbulence is formed, it will push the electromagnet 25 to move. At this time, the electromagnet 25 will be affected by the turbulence around it and float in the middle of the heat exchange tube 15. The turbulence can make the electromagnet 25 move irregularly in the heat exchange tube 15. At this time, by energizing the conductive block 21, the conductive block 21 will guide the current through the conductive frame 22 to the connecting wire 23. At this time, the connecting wire 23 will conduct electricity to the conductive wire 24. When the conductive wire 24 is energized, it will also energize the electromagnet 25. At this time, the electromagnet 25 will generate an electromagnetic field. When water passes through the electromagnet 25, the electromagnetic field can change the characteristics of the ions in the water, thereby slowing down the deposition rate of calcium carbonate and magnesium carbonate and changing the physical properties during deposition, thereby reducing the formation of scale. The method of reducing scale by the electromagnet 25 does not require dismantling the equipment, which reduces the time required for dismantling the equipment, and uses an elastic cleaning brush to fit the wall of the heat exchange tube 15 when cleaning. However, if the cleaning brush is of different sizes from the heat exchange tube 15, the cleaning brush can only clean the outer wall of the heat exchange tube 15 due to its elasticity, resulting in a cleaning dead angle. Compared with the method of removing scale with a chemical solution, the generation of scale can be reduced during the heat exchange process, and no pollution will be generated, and no corrosion will be caused to the heat exchange tube 15. At the same time, the chemical solution needs to react with the scale in the heat exchange tube 15 for a long time, which will also take a lot of time. During this process, the heat exchanger cannot be used, affecting the heat exchange efficiency. Reducing scale by the electromagnet 25 not only can remove scale during the use of the equipment, but the electromagnetic field range generated by the electromagnet 25 is uniform, and no dead angle will be generated. When the electromagnet 25 moves irregularly through turbulent flow, the electromagnetic field will also change, which can not only further reduce the formation of scale through the change of the electromagnetic field, but also expand the coverage of the electromagnetic field; the electromagnet 25 generates suction and adsorbs impurities in the water on the surface of the electromagnet 25, thereby removing some impurities in the water and reducing some impurities in the water, making subsequent treatment of the water more convenient; The provision of the gasket 151 can provide a buffer when collisions occur between the heat exchange tubes 15, thereby preventing damage to the heat exchange tubes 15 caused by collisions. At the same time, the provision of the gasket 151 can make the turbulence generated when the water flows through greater, thereby increasing the vibration frequency of the heat exchange tube 15. When the vibration frequency of the heat exchange tube 15 increases, the contact with the water flow will increase, the heat exchange efficiency will be increased, and the water flow will have greater fluidity during heat exchange, so that the water flow can contact more heat exchange tubes 15, which not only increases the heat exchange efficiency, but also increases energy utilization.

[0038] Finally, when the water flow generates a vortex at the junction of the fixed cover 14 and the heat exchanger shell 1, the water flow will push the buffer ring 31 to move. When the buffer ring 31 moves, the pushing block 32 will move. When the pushing block 32 moves, it will pull the reset spring 35 to move. At this time, the reset force of the reset spring 35 can reset the pushing block 32 and the buffer ring 31. At this time, the buffer ring 31 will push the water flow inward and reduce the occurrence of vortex during the pushing process, preventing the vortex from rubbing the fixed cover 14 and the heat exchanger shell 1, thereby increasing the service life of the equipment; when the buffer ring 31 pushes the water flow, it can also exchange the water flow, so that part of the water flow that has not undergone heat exchange contacts with the heat exchange tube 15 and exchanges heat, thereby increasing energy utilization. The power generation unit 33 is provided to receive excess thrust when the push block 32 moves outward, and the power generation rotor is rotated by the devices in the power generation unit 33, such as the piston and the crank disk, and generates electrical energy by cutting the magnetic flux lines. Since the electrical energy generated by the power generation unit 33 is small and intermittent, the electrical energy generated by the power generation unit 33 can be stored and provided to the electromagnet 25 for supplementary energy supply, which can reduce the external input electrical energy and thus reduce energy consumption. By designing the buffer ring 31 to be recessed inward on one side away from the heat exchanger shell 1 and having an arc-shaped surface, when the water flow contacts the buffer ring 31, it will flow on the arc surface and reduce direct collision with the water flow, thereby reducing damage to the buffer ring 31 caused by the water flow. When the two streams of water collide in the arc-shaped recess in the buffer ring 31, the outward thrust of the buffer ring 31 will be greater, thereby enabling the power generation unit 33 to have a greater power generation capacity, further reducing the external input electrical energy, and reducing energy consumption.

[0039] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A spirally wound tube array heat exchanger, comprising a heat exchanger housing (1), characterized in that: The top of the heat exchanger shell (1) is fixedly connected to a shell flange (11), and both sides of the heat exchanger shell (1) are fixedly connected to fixed covers (14); a plurality of heat exchange holes are opened on the surface of the fixed cover (14), and heat exchange pipes (15) are fixedly connected in the heat exchange holes; the side of the fixed cover (14) away from the heat exchanger shell (1) is fixedly connected to a descaling unit (2), and the side of the fixed cover (14) away from the heat exchanger shell (1) is fixedly connected to a heat exchange side cover (12), and the side of the heat exchange side cover (12) away from the fixed cover (14) is fixedly connected to a side cover flange (13), and the side cover flange (13) close to the descaling unit (2) is a water inlet; The descaling unit (2) comprises a conductive block (21), the conductive block (21) being fixedly connected to the fixed cover (14), a fixed groove being provided on the surface of the conductive block (21), a conductive frame (22) being fixedly connected in the fixed groove, a plurality of connecting wires (23) being fixedly connected to a side of the conductive frame (22) close to the fixed cover (14), the ends of the connecting wires (23) away from the conductive frame (22) being fixedly connected to conductive wires (24), the ends of the conductive wires (24) away from the conductive frame (22) being in a free state, and a plurality of electromagnets (25) being fixedly connected to the conductive wires (24).

2. The spirally wound tube array heat exchanger according to claim 1, characterized in that: The inner surface of the heat exchange tube (15) is covered with a polytetrafluoroethylene coating, and the surface of the electromagnet (25) is also covered with a polytetrafluoroethylene coating.

3. The spirally wound tube array heat exchanger according to claim 1, characterized in that: The side of the conductive block (21) close to the side cover flange (13) is an arc surface, and a plurality of water openings are provided on the surface of the conductive frame (22).

4. The spirally wound tube array heat exchanger according to claim 1, characterized in that: The inner walls on both sides of the heat exchanger shell (1) are slidably connected to buffer units (3), and the buffer units (3) include a plurality of buffer rings (31) and push blocks (32). The push blocks (32) are sealed and slidably connected to the heat exchanger shell (1), and the push blocks (32) are fixedly connected to the buffer rings (31). The outer wall of the push block (32) near the top is fixedly connected to a limit plate, and a side of the limit plate near the buffer ring (31) is fixedly connected to a return spring (35), and the end of the return spring (35) away from the limit plate is fixedly connected to the outer wall of the heat exchanger shell (1); the buffer ring (31) is located inside the heat exchanger shell (1).

5. The spirally wound tube array heat exchanger according to claim 4, characterized in that: A plurality of brackets (34) are fixedly connected to the surface of the heat exchanger housing (1) close to the push block (32); a power generation unit (33) is fixedly connected to the adjacent side of the brackets (34); and an end of the push block (32) away from the buffer ring (31) is slidably connected to the power generation unit (33).

6. The spirally wound tube array heat exchanger according to claim 4, characterized in that: The side of the buffer ring (31) away from the heat exchanger shell (1) is recessed inwards and has an arc-shaped surface.

7. The spirally wound tube array heat exchanger according to claim 1, characterized in that: A buffer pad (16) is fixedly connected to the inner wall of the heat exchanger shell (1), and the buffer pad (16) is made of heat insulating material.

8. The spirally wound tube array heat exchanger according to claim 1, characterized in that: Gaskets (151) are fixedly connected to adjacent surfaces of the heat exchange tubes (15).

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