Plate type heat exchanger capable of recycling waste heat

Abstract

The invention relates to the technical field of plate heat exchangers, in particular to a plate heat exchanger capable of recycling waste heat, which comprises a plate heat exchange device and a heat exchange box, a hot fluid inlet is formed in the plate type heat exchange device, a hot fluid outlet is formed in the same side of the hot fluid inlet in the plate type heat exchange device, and a cold fluid inlet is formed in one side of the hot fluid inlet in the plate type heat exchange device. The mode that in the prior art, indirect heat exchange depends on fluid in a heat exchange box is replaced, a directional heat transfer channel special for the upper heat conduction pipe and the lower heat conduction pipe is formed, the graphene heat conduction pieces are tightly attached to the outer wall of the pipeline, heat of waste heat fluid in the lower heat conduction pipe can be rapidly captured, and then the heat is directly conducted to cold fluid in the upper heat conduction pipe through the multiple graphene heat conduction columns; a heat transfer path is obviously shortened, and midway loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of plate heat exchanger technology, and in particular to a plate heat exchanger capable of waste heat recovery. Background Technology

[0002] With the global resource supply and demand imbalance intensifying and environmental protection requirements becoming increasingly stringent, various industries have entered a stage of in-depth practice in exploring efficient energy recycling and sustainable development models. The large amount of waste heat generated during industrial production, as a reusable energy resource, can be efficiently recovered and rationally reused through scientific and technological means. This can not only significantly reduce enterprise energy consumption and the environmental burden caused by energy waste, but also optimize the cost structure for enterprises. Therefore, energy-saving heat exchange devices are needed, and plate heat exchangers, with their core advantages of high heat exchange efficiency, compact structure, and strong adaptability, have become key equipment for achieving heat transfer between fluids in various industrial fields.

[0003] For example, Chinese patent CN119958334A discloses a plate heat exchanger capable of waste heat recovery, including a plate heat exchange device. The surface of the plate heat exchange device is provided with a hot fluid inlet, a cold fluid inlet, a hot fluid outlet, and a cold fluid outlet. The hot fluid inlet is located above the hot fluid outlet, and the cold fluid inlet is located above the cold fluid outlet.

[0004] While the aforementioned patent addresses the issue that existing waste heat recovery systems typically only perform preliminary heat transfer on the high-temperature fluid when processing waste heat liquid flowing out of plate heat exchangers, neglecting the significant residual heat energy in the waste heat liquid discharged from the plate heat exchanger, and that the reaction liquid, although cooled after one heat exchange, still possesses considerable residual heat, the lack of effective energy recovery would result in substantial energy waste. However, the device still has some shortcomings that require improvement. Existing technology lacks a directional heat conduction structure and relies solely on indirect heat exchange through the fluid within the heat exchange box. This results in a long heat transfer path and significant losses between the two pipes, making it difficult to efficiently transfer the heat from the waste heat fluid in the lower heat conduction pipe to the cold fluid in the upper heat conduction pipe, leading to low waste heat recovery efficiency. Furthermore, the fluids in the upper and lower heat conduction pipes are prone to temperature stratification or flow dead zones due to uneven flow velocities, resulting in insufficient heat exchange between the fluid near the pipe wall and the fluid in the center of the pipe, further reducing the heat exchange effect. Summary of the Invention

[0005] The purpose of this invention is to provide a plate heat exchanger capable of waste heat recovery, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a plate heat exchanger capable of waste heat recovery, comprising a plate heat exchange device and a heat exchange box. A hot fluid inlet is provided on one side of the plate heat exchange device, and a hot fluid outlet is provided on the same side as the hot fluid inlet. A cold fluid inlet is provided on the same side as the hot fluid inlet, and a cold fluid outlet is provided on the same side as the cold fluid inlet. An upper... A heat-conducting pipe is provided. A lower heat-conducting pipe is fixedly connected to one side of the upper heat-conducting pipe inside the heat exchange box. One end of the upper heat-conducting pipe is fixedly connected to one end of the cold fluid inlet, and one end of the lower heat-conducting pipe is fixedly connected to one end of the hot fluid outlet. A heat-conducting mechanism is provided on one side of the upper and lower heat-conducting pipes. A pushing component is provided on the side of the upper and lower heat-conducting pipes near the heat-conducting mechanism, and an agitating component is provided on the side of the upper and lower heat-conducting pipes away from the heat-conducting mechanism. A power mechanism is provided on the side of the heat exchange box away from the plate heat exchange device.

[0007] Furthermore, the heat-conducting mechanism includes a first sleeve and a second sleeve. The first sleeve is slidably sleeved on the outer surface of the lower heat-conducting pipe, and the second sleeve is slidably sleeved on the outer surface of the upper heat-conducting pipe. Graphene heat-conducting sheets are fixedly connected to the inner walls of both the first and second sleeves. Graphene heat-conducting columns are fixedly connected between the two graphene heat-conducting sheets, and multiple graphene heat-conducting columns are provided. A support tube is fixedly connected between the first and second sleeves, and the graphene heat-conducting columns are fixedly connected to the inner side of the support tube. Baffles are fixedly connected to both sides of the first and second sleeves.

[0008] Furthermore, a first shaft frame is fixedly connected to the side of the heat exchange box away from the plate heat exchange device. The power mechanism is mounted on the first shaft frame. The power mechanism includes a motor, which is fixedly connected to one side of the first shaft frame. A first shaft is fixedly connected to the output end of the motor. The first shaft is rotatably connected to the first shaft frame. Worms are fixedly connected to both sides of the first shaft. Worm wheels are meshed with both sides of the worm. One side of the worm wheel is fixedly connected to one side of the pushing component. A second shaft is fixedly connected to one side of the worm wheel. The agitation component is mounted on the second shaft.

[0009] Furthermore, a fixed base is fixedly connected to one side of the heat exchange box, and two fixed bases are provided. The pushing component is located on the fixed base, and the worm gear is located on one side of the fixed base. The pushing component includes a lead screw, which is rotatably connected to the inside of the fixed base. The worm gear is fixedly connected to the lead screw. A sliding groove is provided inside the fixed base, and the lead screw is rotatably connected to the inside of the sliding groove. Limiting grooves are provided on both sides of the inside of the sliding groove. Limiting blocks are slidably connected inside the limiting grooves. One side of the limiting block is fixedly connected to one side of the screw block. Linking blocks are fixedly connected to both sides of one end of the screw block. The linkage blocks are fixedly connected to the first sleeve and the second sleeve, respectively.

[0010] Furthermore, a second shaft frame is fixedly connected to one side of the first shaft frame on the heat exchange box. The agitation assembly is mounted on the second shaft frame via a second shaft rod. The agitation assembly includes an agitation plate, which is rotatably connected to the inside of the upper heat-conducting pipe and the lower heat-conducting pipe, respectively. Springs and telescopic tubes are fixedly connected to both sides of the agitation plate. The springs are sleeved on the outside of the telescopic tubes. A scraper is fixedly connected to the common side of the springs and the telescopic tubes. A driving toothed cone is fixedly connected to one side of the second shaft rod, and a driven toothed cone is fixedly connected to one side of the agitation plate. The driving toothed cone and the driven toothed cone are meshed together.

[0011] Furthermore, a connecting pipe is fixedly connected to one side of both the upper and lower heat pipes, and the connecting pipe is inclined.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] Firstly, this invention replaces the existing technology's reliance on indirect heat exchange via fluid within the heat exchange box by setting up a heat-conducting mechanism consisting of a first sleeve, a second sleeve, graphene heat-conducting sheets, and graphene heat-conducting pillars. This forms a dedicated directional heat transfer channel between the upper and lower heat-conducting pipes. The graphene heat-conducting sheets are tightly fitted to the outer wall of the pipe, quickly capturing the heat of the waste heat fluid in the lower heat-conducting pipe. This heat is then directly conducted to the cold fluid in the upper heat-conducting pipe via multiple graphene heat-conducting pillars, significantly shortening the heat transfer path and reducing intermediate losses. Simultaneously, the first and second sleeves can slide along the pipe under the drive of the pushing component, ensuring that the heat-conducting mechanism covers the entire length of the pipe, avoiding local heat accumulation or heat exchange blind spots, maximizing the residual heat energy in the waste heat fluid, and effectively solving the problem of low waste heat recovery efficiency.

[0014] Secondly, in this invention, by setting an agitation assembly on one side of the upper and lower heat-conducting pipes, and driving the agitation plate to rotate through a power mechanism, the rotation of the agitation plate can actively disturb the fluid inside the pipe, breaking the relative static state of the fluid near the pipe wall and the center of the pipe, promoting the full mixing of hot and cold fluids, eliminating temperature stratification, and the spring and telescopic tube structure on both sides of the agitation plate can better adapt to the pipe, ensuring that the agitation range covers the cross-section of the pipe, allowing the fluid in each area of ​​the pipe to fully exchange heat with the pipe wall, avoiding the decrease in heat exchange effect due to insufficient local heat exchange.

[0015] Thirdly, in this invention, by setting up a power mechanism, the driving component and the stirring component can be driven simultaneously, so that the reciprocating heat conduction of the heat conduction mechanism and the rotation of the stirring plate inside the pipe can be linked together. The movement of the heat conduction mechanism ensures efficient heat transfer throughout the pipe, while the rotation of the stirring component ensures uniform heat exchange of the fluid inside the pipe. With the synergistic effect of the two, the problem of long heat transfer path between the two pipes is solved, and the defect of insufficient heat exchange of the fluid inside the pipe is improved, effectively enhancing the overall heat exchange performance of the equipment. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of one side of the heat exchange box in this invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of one side of the upper heat pipe and the lower heat pipe in this invention;

[0019] Figure 4 This is a schematic diagram of the power mechanism and agitation component in this invention;

[0020] Figure 5 This is a schematic cross-sectional view of the heat exchanger box in this invention;

[0021] Figure 6 In this invention Figure 5 A magnified structural diagram at point A;

[0022] Figure 7 This is a partial structural diagram of the heat conduction mechanism in this invention;

[0023] Figure 8 In this invention Figure 7 A magnified structural diagram at point B.

[0024] In the diagram: 1. Plate heat exchanger; 2. Hot fluid inlet; 3. Cold fluid inlet; 4. Hot fluid outlet; 5. Cold fluid outlet; 6. Upper heat pipe; 7. Lower heat pipe; 8. Heat exchange box; 9. Heat conduction mechanism; 91. First sleeve; 92. Second sleeve; 93. Graphene heat-conducting sheet; 94. Graphene heat-conducting column; 95. Support tube; 96. Baffle; 10. Power mechanism; 101. Motor; 102. First shaft; 103. Worm gear. ; 104. Worm gear; 105. Second shaft; 11. First shaft support; 12. Fixed seat; 13. Push assembly; 131. Lead screw; 132. Screw block; 133. Linkage block; 134. Slide groove; 135. Limiting groove; 136. Limiting block; 14. Agitating assembly; 141. Scraper; 142. Agitating plate; 143. Driving toothed bevel; 144. Driven toothed bevel; 145. Spring; 146. Telescopic tube; 15. Second shaft support; 16. Connecting tube. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-8 In this embodiment of the invention, a plate heat exchanger capable of waste heat recovery includes a plate heat exchange device 1 and a heat exchange box 8. A hot fluid inlet 2 is provided on one side of the plate heat exchange device 1, and a hot fluid outlet 4 is provided on the same side as the hot fluid inlet 2. A cold fluid inlet 3 is provided on the same side as the cold fluid inlet 3, and a cold fluid outlet 5 is provided on the same side as the cold fluid inlet 3. An upper heat-conducting pipe 6 is fixedly connected to one side of the interior of the heat exchange box 8. A lower heat pipe 7 is fixedly connected to one side of the upper heat pipe 6 inside the heat exchange box 8. One end of the upper heat pipe 6 is fixedly connected to one end of the cold fluid inlet 3, and one end of the lower heat pipe 7 is fixedly connected to one end of the hot fluid outlet 4. A heat conduction mechanism 9 is provided on one side of the upper heat pipe 6 and the lower heat pipe 7. A pushing component 13 is provided on the side of the upper heat pipe 6 and the lower heat pipe 7 near the heat conduction mechanism 9. An agitating component 14 is provided on the side of the upper heat pipe 6 and the lower heat pipe 7 away from the heat conduction mechanism 9. A power mechanism 10 is provided on the side of the heat exchange box 8 away from the plate heat exchange device 1.

[0027] Please see Figure 7-8The heat-conducting mechanism 9 includes a first sleeve 91 and a second sleeve 92. The first sleeve 91 is slidably sleeved on the outer surface of the lower heat-conducting pipe 7, and the second sleeve 92 is slidably sleeved on the outer surface of the upper heat-conducting pipe 6. Graphene heat-conducting sheets 93 are fixedly connected to the inner walls of both the first sleeve 91 and the second sleeve 92. Graphene heat-conducting pillars 94 are fixedly connected between two graphene heat-conducting sheets 93, and multiple graphene heat-conducting pillars 94 are provided. The first sleeve 91 and the second sleeve 92 are fixedly connected... A support tube 95 is provided, and the graphene heat-conducting column 94 is fixedly connected to the inner side of the support tube 95. Baffles 96 are fixedly connected to both sides of the first sleeve 91 and the second sleeve 92. When the equipment is started, the waste heat fluid flowing out of the plate heat exchange device 1 is introduced into the lower heat-conducting pipe 7, and the cold fluid to be preheated is introduced into the upper heat-conducting pipe 6. At this time, the graphene heat-conducting sheet 93 on the inner wall of the first sleeve 91 is tightly attached to the outer wall of the lower heat-conducting pipe 7, and quickly absorbs the waste heat transferred by the lower heat-conducting pipe 7. Then the heat is transferred through the support tube 95. Multiple graphene heat-conducting pillars 94 on the inner side of the first sleeve 91 and the second sleeve 92 are directionally conducted to the graphene heat-conducting sheet 93 on the inner wall of the second sleeve 92. The graphene heat-conducting sheet 93 on the inner wall of the second sleeve 92 then transfers the heat to the cold fluid in the upper heat-conducting pipe 6. At the same time, when the driving component 13 is running, it will drive the first sleeve 91 and the second sleeve 92 to slide synchronously along the length direction of the upper heat-conducting pipe 6 and the lower heat-conducting pipe 7. Through the cooperation of the graphene heat-conducting sheet 93 and the graphene heat-conducting pillars 94, a direct and... The highly efficient directional heat conduction path significantly shortens the heat transfer distance and reduces heat loss during the transfer process compared to existing technologies that rely on indirect heat exchange with fluids within the heat exchange box 8. This allows the heat from the waste fluid in the lower heat pipe 7 to be transferred more fully to the cold fluid in the upper heat pipe 6. Furthermore, the sliding design of the first sleeve 91 and the second sleeve 92 enables the heat conduction mechanism 9 to cover the entire length of the pipe, avoiding heat exchange blind spots caused by the inability of some areas of the pipe to contact the heat conduction mechanism 9, and further improving the comprehensiveness of waste heat recovery.

[0028] Please see Figure 4The heat exchange box 8 is fixedly connected to a first shaft frame 11 on the side away from the plate heat exchange device 1. The power mechanism 10 is mounted on the first shaft frame 11. The power mechanism 10 includes a motor 101, which is fixedly connected to one side of the first shaft frame 11. The output end of the motor 101 is fixedly connected to a first shaft 102, which is rotatably connected to the first shaft frame 11. Worms 103 are fixedly connected to both sides of the first shaft 102, and worm wheels 104 are meshed with both sides of the worm 103. One side of the worm wheel 104 is fixedly connected to one side of the pushing assembly 13, and a second shaft 105 is fixedly connected to one side of the worm wheel 104. The stirring assembly 14 is mounted on the second shaft 105. When the motor 101 is started, the output end of the motor 101 drives the first shaft 102 to rotate on the first shaft frame 11. The worm gears 103 on both sides rotate synchronously. The worm gears 103 drive the worm wheel 104 to rotate through meshing transmission. Since one side of the worm wheel 104 is fixedly connected to the push component 13, the rotation of the worm wheel 104 directly drives the push component 13 to run, providing power to the push component 13. At the same time, the second shaft 105 fixed on the other side of the worm wheel 104 will rotate synchronously with the worm wheel 104. When the second shaft 105 rotates, it transmits power to the stirring component 14, thereby driving the stirring component 14 to run. This achieves the effect of a single power source, motor 101, providing power to both the push component 13 and the stirring component 14. Compared with the prior art, which may require multiple power sources to drive different components separately, this solution can drive both the push component 13 and the stirring component 14 simultaneously with a single motor 101, simplifying the power structure of the equipment, reducing the number of power sources, and lowering the manufacturing cost and energy consumption of the equipment.

[0029] Please see Figure 6The heat exchanger 8 has a fixed base 12 fixedly connected to one side of its interior, and there are two fixed bases 12. The pushing assembly 13 is located on the fixed base 12, and the worm gear 104 is located on one side of the fixed base 12. The pushing assembly 13 includes a lead screw 131, which is rotatably connected to the interior of the fixed base 12. The worm gear 104 is fixedly connected to the lead screw 131. The fixed base 12 has a sliding groove 134 inside, and the lead screw 131 is rotatably connected to the interior of the sliding groove 134. Limiting grooves 135 are provided on both sides, and limiting blocks 136 are slidably connected inside the limiting grooves 135. One side of the limiting block 136 is fixedly connected to one side of the screw block 132. Linkage blocks 133 are fixedly connected to both sides of one end of the screw block 132. The linkage blocks 133 are fixedly connected to the first sleeve 91 and the second sleeve 92 respectively. When the worm gear 104 rotates, the lead screw 131 fixed on the worm gear 104 rotates synchronously with the worm gear 104 in the sliding groove 134 inside the fixed seat 12. During the rotation of the lead screw 131... Since the limiting blocks 136 in the limiting grooves 135 on both sides of the slide groove 134 are fixedly connected to the screw block 132, the limiting blocks 136 restrict the rotation of the screw block 132 in the slide groove 134, so that the screw block 132 can only slide in the slide groove 134 along the length direction of the lead screw 131. When the screw block 132 slides, it will drive the linkage block 133 and the heat-conducting mechanism 9 connected to it to move synchronously. By controlling the forward and reverse rotation of the motor 101, the forward and reverse rotation of the lead screw 131 can be realized, thereby driving the screw block 132 and the heat-conducting mechanism 9 to slide back and forth along the length direction of the pipe, satisfying the requirements of the sliding groove 134. The heat conduction mechanism 9 meets the heat exchange requirements at different locations in the pipeline. The cooperation between the limiting groove 135 and the limiting block 136 can precisely limit the movement direction of the screw block 132, ensuring that the screw block 132 slides only along the length direction of the screw 131. This avoids the failure of the pushing component 13 caused by the screw block 132 rotating with the screw 131, ensuring that the heat conduction mechanism 9 can move stably. By controlling the forward and reverse rotation of the motor 101 to make the screw block 132 and the heat conduction mechanism 9 slide back and forth, the heat conduction mechanism 9 can repeatedly pass through various areas of the pipeline, further enhancing the heat exchange effect along the entire length of the pipeline.

[0030] Please see Figure 4A second shaft frame 15 is fixedly connected to one side of the first shaft frame 11 on the heat exchange box 8. The stirring assembly 14 is mounted on the second shaft frame 15 via a second shaft rod 105. The stirring assembly 14 includes a stirring plate 142, which is rotatably connected to the inside of the upper heat-conducting pipe 6 and the lower heat-conducting pipe 7. Springs 145 and telescopic tubes 146 are fixedly connected to both sides of the stirring plate 142, with the springs 145 sleeved on the outside of the telescopic tubes 146. A scraper 141 is fixedly connected to one side of both the spring 145 and the telescopic tube 146. A driving toothed cone 143 is fixedly connected to one side of the second shaft 105, and a driven toothed cone 144 is fixedly connected to one side of the agitator 142. The driving toothed cone 143 and the driven toothed cone 144 are meshed together. When the second shaft 105 rotates with the worm gear 104, the driving toothed cone 143 on one side rotates synchronously. The driving toothed cone 143 transmits power through meshing with the driven toothed cone 144. The driven toothed cone 144 rotates, which in turn drives the agitator 142, which is fixedly connected to it, to rotate inside the upper heat pipe 6 and the lower heat pipe 7. This promotes thorough mixing of fluids in different areas of the pipe, allowing fluids near the pipe wall and the center of the pipe to fully participate in heat exchange, thus improving the uniformity of heat exchange within the pipe. During the rotation of the agitator 142, the scraper 141, which is connected to the springs 145 on both sides and the telescopic tube 146, rotates synchronously with the agitator 142. Under the elastic force of the springs 145, the scraper 141 always adheres to the inner wall of the pipe. When rotating, it can scrape away dirt, scale, and other impurities attached to the inner wall of the pipe. At the same time, the telescopic tube 146 will extend or retract according to slight changes in the inner diameter of the pipe or slight resistance encountered by the scraper 141. The springs 145 provide support and restoring force when the telescopic tube 146 extends or retracts, ensuring that the scraper 141 is always in close contact with the inner wall of the pipe and preventing the scraper 141 from being damaged due to rigid collision with the inner wall of the pipe or impurities.

[0031] Please see Figure 3 One side of the upper heat pipe 6 and the lower heat pipe 7 is fixedly connected to a connecting pipe 16, which is inclined. When the external pipe is connected to the upper heat pipe 6 and the lower heat pipe 7, the connecting pipe 16 realizes the transition connection between the external pipe and the upper heat pipe 6 and the lower heat pipe 7.

[0032] The working principle of this invention is as follows: First, the external pipes are connected to the equipment. The external hot fluid delivery pipe is connected to the hot fluid inlet 2 of the plate heat exchanger 1, and the external cold fluid delivery pipe is connected to the connecting pipe 16 on one side of the upper heat pipe 6. The cold fluid outlet 5 of the plate heat exchanger 1 is connected to the external cold fluid via a pipe. The connecting pipe 16 on the other side of the lower heat pipe 7 is connected to the external hot fluid discharge pipe. The external pipes are transitionally connected to the upper heat pipe 6 and the lower heat pipe 7 through the inclined connecting pipe 16. After the connection is completed, the equipment is started. The external hot fluid enters the plate heat exchanger 1 through the hot fluid inlet 2, and the external cold fluid first enters the upper heat pipe 6 through the connecting pipe 16. Then, the motor 101 in the power mechanism 10 is started. The output end of the motor 101 drives the first shaft 102 to rotate on the first shaft frame 11. When the first shaft 102 rotates, the worm gears 103 on both sides rotate synchronously. The worm gears 103 drive the worm wheel 104 to rotate through meshing transmission with the worm wheel 104. One side of worm gear 104 is fixedly connected to the lead screw 131 of the push assembly 13. The rotation of worm gear 104 drives lead screw 131 to rotate synchronously in the slide groove 134 inside the fixed seat 12. During the rotation of lead screw 131, the limiting blocks 136 in the limiting grooves 135 on both sides of slide groove 134 restrict the rotation of screw block 132, so that screw block 132 slides only along the length direction of lead screw 131. When screw block 132 slides, it drives the heat conduction mechanism 9 connected to it to move synchronously. By controlling the forward and reverse rotation of motor 101, lead screw 131 can be rotated. The forward and reverse rotation causes the screw block 132 and the heat conduction mechanism 9 to slide back and forth along the length of the upper heat conduction pipe 6 and the lower heat conduction pipe 7. The cooperation between the limiting groove 135 and the limiting block 136 can accurately limit the movement direction of the screw block 132, prevent the failure of the pushing component 13, and ensure the stable movement of the heat conduction mechanism 9. In addition, the single motor 101 provides power to both the pushing component 13 and the stirring component 14 through the worm gear 103 and the worm wheel 104, which simplifies the power structure of the equipment, reduces the number of power sources, and reduces manufacturing costs and energy consumption.

[0033] When the heat conduction mechanism 9 is running, the graphene heat-conducting sheet 93 on the inner wall of the first sleeve 91 closely adheres to the outer wall of the lower heat conduction pipe 7, quickly absorbing the residual heat transferred from the residual heat fluid flowing out of the hot fluid outlet 4 of the plate heat exchange device 1 within the lower heat conduction pipe 7. The heat is directionally conducted through multiple graphene heat-conducting columns 94 on the inner side of the support tube 95 to the graphene heat-conducting sheet 93 on the inner wall of the second sleeve 92, and then transferred by the graphene heat-conducting sheet 93 to the cold fluid in the upper heat conduction pipe 6, preheating the cold fluid. The cooperation between the graphene heat-conducting sheet 93 and the graphene heat-conducting columns 94 constructs a direct and efficient directional heat conduction path between the upper heat conduction pipe 6 and the lower heat conduction pipe 7, compared to the current... The technology relies on indirect heat exchange within the heat exchange box 8, significantly shortening the heat transfer distance and reducing heat loss. This allows the heat from the waste heat fluid to be more fully transferred to the cold fluid. Furthermore, the heat-conducting mechanism 9 slides back and forth with the screw block 132, covering the entire length of the pipe, avoiding heat exchange blind spots and improving the comprehensiveness of waste heat recovery. Simultaneously, the second shaft 105, fixed to the other side of the worm gear 104, rotates synchronously with the worm gear 104. The second shaft 105 drives the active toothed cone 143 on one side to rotate. The active toothed cone 143, through meshing with the driven toothed cone 144, drives the stirring plate 142 to rotate inside the upper heat-conducting pipe 6 and the lower heat-conducting pipe 7. When the stirring plate 142 rotates... This process promotes thorough mixing of fluids in different areas within the pipe, breaking down fluid temperature stratification and flow dead zones. It ensures that fluids near the pipe wall and center can fully participate in heat exchange, improving the uniformity of heat transfer within the pipe. Furthermore, the scraper 141, connected to the springs 145 on both sides of the agitator 142 and the telescopic tube 146, rotates synchronously with the agitator 142. Under the elastic force of the springs 145, the scraper 141 remains in contact with the inner wall of the pipe, scraping away dirt, scale, and other impurities. No additional cleaning components or manual cleaning are required, reducing maintenance workload and preventing scale from increasing thermal resistance and affecting heat exchange efficiency. The telescopic tube 146 can also adjust to slight changes in the inner diameter of the pipe... The scraper 141 extends and retracts when encountering slight resistance, and the spring 145 provides support and restoring force, ensuring that the scraper 141 fits tightly against the inner wall of the pipe while avoiding damage caused by rigid collision. The preheated cold fluid enters the plate heat exchange device 1 through the cold fluid inlet 3 and undergoes secondary heat exchange with the hot fluid inside the device. The hot fluid after heat exchange flows into the lower heat pipe 7 from the hot fluid outlet 4 to further release waste heat, while the cold fluid after heat exchange flows out from the cold fluid outlet 5 for subsequent use. Throughout the process, all components work together to achieve full recovery and utilization of the waste heat of the hot fluid, significantly improving energy efficiency and reducing the company's energy consumption costs.

Claims

1. A plate heat exchanger capable of waste heat recovery, characterized in that, The heat exchanger includes a plate heat exchanger (1) and a heat exchange box (8). A hot fluid inlet (2) is provided on one side of the plate heat exchanger (1). A hot fluid outlet (4) is provided on the same side of the plate heat exchanger (1) as the hot fluid inlet (2). A cold fluid inlet (3) is provided on the same side of the plate heat exchanger (1) as the cold fluid inlet (3). A cold fluid outlet (5) is provided on the same side of the plate heat exchanger (1). An upper heat pipe (6) is fixedly connected to one side of the interior of the heat exchange box (8). A heat pipe (6) is fixedly connected to one side of the upper heat pipe (6) inside the heat exchange box (8). A lower heat pipe (7) is fixedly connected to the upper heat pipe (6), one end of which is fixedly connected to one end of the cold fluid inlet (3), and one end of the lower heat pipe (7) is fixedly connected to one end of the hot fluid outlet (4). A heat conduction mechanism (9) is provided on one side of the upper heat pipe (6) and the lower heat pipe (7). A pushing component (13) is provided on the side of the upper heat pipe (6) and the lower heat pipe (7) near the heat conduction mechanism (9). A stirring component (14) is provided on the side of the upper heat pipe (6) and the lower heat pipe (7) away from the heat conduction mechanism (9). A power mechanism (10) is provided on the side of the heat exchange box (8) away from the plate heat exchange device (1).

2. A plate heat exchanger capable of waste heat recovery according to claim 1, characterized in that, The heat conduction mechanism (9) includes a first sleeve (91) and a second sleeve (92). The first sleeve (91) is slidably sleeved on the outer surface of the lower heat conduction pipe (7), and the second sleeve (92) is slidably sleeved on the outer surface of the upper heat conduction pipe (6). Graphene heat conduction sheets (93) are fixedly connected to the inner walls of the first sleeve (91) and the second sleeve (92). Graphene heat conduction columns (94) are fixedly connected between the two graphene heat conduction sheets (93), and multiple graphene heat conduction columns (94) are provided.

3. A plate heat exchanger capable of waste heat recovery according to claim 2, characterized in that, A support tube (95) is fixedly connected between the first sleeve (91) and the second sleeve (92). The graphene heat-conducting column (94) is fixedly connected to the inside of the support tube (95). Baffles (96) are fixedly connected to both sides of the first sleeve (91) and the second sleeve (92).

4. A plate heat exchanger capable of waste heat recovery according to claim 1, characterized in that, The heat exchange box (8) is fixedly connected to a first shaft frame (11) on the side away from the plate heat exchange device (1), and the power mechanism (10) is mounted on the first shaft frame (11).

5. A plate heat exchanger capable of waste heat recovery according to claim 4, characterized in that, The power mechanism (10) includes a motor (101), which is fixedly connected to one side of the first shaft frame (11). The output end of the motor (101) is fixedly connected to a first shaft (102), which is rotatably connected to the first shaft frame (11). Both sides of the first shaft (102) are fixedly connected to worm gears (103), and both sides of the worm gears (103) are meshed with worm wheels (104). One side of the worm wheel (104) is fixedly connected to one side of the push assembly (13), and one side of the worm wheel (104) is fixedly connected to a second shaft (105). The stirring assembly (14) is mounted on the second shaft (105).

6. A plate heat exchanger capable of waste heat recovery according to claim 5, characterized in that, The heat exchange box (8) is fixedly connected to a fixed seat (12) on one side inside, and there are two fixed seats (12). The pushing component (13) is located on the fixed seat (12), and the worm gear (104) is located on one side of the fixed seat (12).

7. A plate heat exchanger capable of waste heat recovery according to claim 6, characterized in that, The pushing assembly (13) includes a lead screw (131), which is rotatably connected to the inside of the fixed seat (12). The worm gear (104) is fixedly connected to the lead screw (131). The fixed seat (12) has a sliding groove (134) inside, and the lead screw (131) is rotatably connected to the inside of the sliding groove (134). Limiting grooves (135) are opened on both sides of the inside of the sliding groove (134). Limiting blocks (136) are slidably connected inside the limiting grooves (135). One side of the limiting block (136) is fixedly connected to one side of the screw block (132). Linking blocks (133) are fixedly connected to both sides of one end of the screw block (132). The linkage blocks (133) are fixedly connected to the first sleeve (91) and the second sleeve (92) respectively.

8. A plate heat exchanger capable of waste heat recovery according to claim 5, characterized in that, The heat exchange box (8) is fixedly connected to a second shaft frame (15) on one side of the first shaft frame (11), and the stirring assembly (14) is mounted on the second shaft frame (15) via a second shaft rod (105).

9. A plate heat exchanger capable of waste heat recovery according to claim 8, characterized in that, The stirring assembly (14) includes a stirring plate (142), which is rotatably connected inside the upper heat pipe (6) and the lower heat pipe (7). A spring (145) and a telescopic tube (146) are fixedly connected to both sides of the stirring plate (142). The spring (145) is sleeved on the outside of the telescopic tube (146). A scraper (141) is fixedly connected to the common side of the spring (145) and the telescopic tube (146). A driving toothed cone (143) is fixedly connected to one side of the second shaft (105), and a driven toothed cone (144) is fixedly connected to one side of the stirring plate (142). The driving toothed cone (143) and the driven toothed cone (144) are meshed together.

10. A plate heat exchanger capable of waste heat recovery according to claim 1, characterized in that, One side of the upper heat pipe (6) and the lower heat pipe (7) are fixedly connected to a connecting pipe (16), which is inclined.

Images