Heat exchanger with waste heat recovery

Abstract

This utility model belongs to the field of heat recovery technology, specifically a heat exchanger with waste heat recovery, including a shell; multiple connecting pipes are fixedly connected to the side walls and bottom of the shell; a processing box is installed inside the shell; multiple heat exchange membranes are fixedly connected inside the processing box; the multiple heat exchange membranes divide the interior of the processing box into an exhaust channel and a recovery channel; a first fixing rod is fixedly connected inside the shell; a moving pipe is slidably connected to the middle of the first fixing rod; a connecting frame is fixedly connected to the bottom of the moving pipe; multiple pairs of scrapers are fixedly connected to the bottom of the connecting frame; the multiple pairs of scrapers are slidably connected to the exhaust channel separated by the heat exchange membranes; through the above structure, impurities attached to the surface of the heat exchange membranes can be cleaned in a timely manner during the process of recovering heat energy from the exhaust gas, reducing the occurrence of heat exchange effect reduction caused by impurity adhesion, thereby improving the waste heat recovery effect.

Description

Technical Field

[0001] This utility model belongs to the field of heat recovery technology, specifically a heat exchanger with waste heat recovery. Background Technology

[0002] Waste heat recovery refers to the technology of recovering and reusing waste heat generated in industrial production or other processes.

[0003] Waste heat recovery can improve energy efficiency, reduce energy consumption, reduce environmental pollution, and lower production costs. Heat exchangers are commonly used devices for recovering heat from exhaust fluids. When high-temperature gases are emitted from industrial production, the emitted high-temperature gases and the low-temperature fluid used for heat recovery exchange heat through the heat conduction of the separator in the heat exchanger, which lowers the temperature of the emitted gas and raises the temperature of the recovered fluid. Waste heat can be reused by reusing the heat in the recovered fluid. However, impurities in the emitted gas can easily adhere to the surface of the heat-conducting material, thereby affecting the heat conduction effect and the waste heat recovery effect.

[0004] Therefore, this utility model provides a heat exchanger with waste heat recovery. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A heat exchanger with waste heat recovery, as described in this utility model, includes a shell; multiple connecting pipes are fixedly connected to the side walls and bottom of the shell; a processing box is installed inside the shell; multiple heat exchange membranes are fixedly connected inside the processing box; the multiple heat exchange membranes divide the interior of the processing box into an exhaust channel and a recovery channel; a first fixing rod is fixedly connected inside the shell; a moving pipe is slidably connected to the middle of the first fixing rod; a connecting frame is fixedly connected to the bottom of the moving pipe; multiple pairs of scrapers are fixedly connected to the bottom of the connecting frame; the multiple pairs of scrapers are slidably connected within the exhaust channel separated by the heat exchange membranes; a driving assembly is installed inside the shell. Through the above structure, impurities adhering to the surface of the heat exchange membranes can be cleaned in a timely manner during the recovery of heat energy from the exhaust gas, reducing the decrease in heat exchange efficiency caused by impurity adhesion, thereby improving the waste heat recovery effect.

[0007] Preferably, the drive assembly includes a shaft, blades, and levers; the shaft is rotatably connected to the inside of the housing; multiple blades are arranged in a circumferential array and fixed to the middle of the shaft; multiple levers are arranged in a circumferential array and fixed to the middle of the shaft; a second fixing rod is fixed to the top of the moving tube; an elastic sleeve is fixed to one end of the moving tube; the other end of the elastic sleeve is fixed to the side wall of the housing; with the above structure, the force of airflow can be used as power to drive the scraper to move and clean the surface of the heat exchange film, without the need for an additional drive device, reducing energy consumption and lowering costs.

[0008] Preferably, two sets of third fixing rods are fixedly connected inside the outer shell; the two sets of third fixing rods are located outside both ends of the recovery flow channel of the processing box; multiple elastic ropes are fixedly connected between the two sets of third fixing rods; the multiple elastic ropes pass through the recovery flow channel separated by multiple heat exchange membranes; multiple beads are fixedly connected to the middle of the elastic ropes; through the above structure, the heat exchange membrane can be made to vibrate continuously, thereby shaking off some impurities and bubbles attached to the heat exchange membrane, reducing the impact on heat exchange efficiency and improving the heat recovery effect.

[0009] Preferably, a telescopic sleeve is fixedly connected to one end of the moving tube away from the elastic sleeve; the other end of the telescopic sleeve is fixedly connected to the side wall of the outer shell; through the above structure, the occurrence of impurities in the airflow falling on the first fixed rod, which would increase the moving resistance of the moving tube, can be reduced, so that the movement of the moving tube remains smooth.

[0010] Preferably, a roller is rotatably connected to the top end of the second fixed rod; the diameter of the roller is larger than the width of the second fixed rod; through the above structure, the sliding friction between the lever and the second fixed rod is transformed into rolling friction between the roller and the lever, which reduces transmission resistance, reduces component wear, and improves component service life.

[0011] Preferably, multiple support strips are fixedly connected between each pair of scraper strips; through the above structure, the occurrence of deformation and separation of a pair of scraper strips from the heat exchange film can be reduced, thereby improving the cleaning effect on the heat exchange film.

[0012] Preferably, the heat exchange membrane is wavy; the scraper is also wavy and conforms to the heat exchange membrane. Through the above structure, the residence time of the emitted high-temperature gas in the treatment chamber can be increased, so that the high-temperature gas can fully participate in heat exchange and improve the heat recovery effect.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The heat exchanger with waste heat recovery described in this utility model, through the arrangement of the shell, connecting pipe port, processing box, heat exchange membrane, first fixed rod, moving pipe, connecting frame and scraper, can promptly clean the impurities attached to the surface of the heat exchange membrane during the process of recovering heat energy from the exhaust gas, reduce the occurrence of heat exchange effect decline caused by impurity adhesion, and thus improve the waste heat recovery effect.

[0015] 2. The heat exchanger with waste heat recovery described in this utility model, through the arrangement of shaft, blade, lever, second fixing rod and elastic sleeve, can use the power of airflow as power to drive the scraper to move and clean the surface of the heat exchange film, without the need for an additional driving device, reducing energy consumption and lowering costs. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the leaf plate in this utility model;

[0019] Figure 3 This is a schematic diagram of the lever structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the movable tube in this utility model;

[0021] Figure 5 This is a schematic diagram of the processing box in this utility model;

[0022] Figure 6 This is a schematic diagram of the heat exchange membrane in this utility model;

[0023] Figure 7 This is a schematic diagram of the elastic rope in this utility model.

[0024] In the diagram: 1. Outer shell; 12. Connecting pipe port; 13. Processing box; 14. Heat exchange membrane; 15. First fixed rod; 16. Moving pipe; 17. Connecting frame; 18. Scraper; 2. Shaft; 21. Blade; 22. Toggle lever; 23. Second fixed rod; 24. Elastic sleeve; 3. Third fixed rod; 31. Elastic rope; 32. Drop ball; 4. Telescopic sleeve; 5. Roller; 6. Support bar. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] like Figures 1 to 6 As shown, a heat exchanger with waste heat recovery according to an embodiment of the present invention includes a shell 1; multiple connecting pipe ports 12 are fixedly connected to the side walls and bottom of the shell 1; a processing box 13 is installed inside the shell 1; multiple heat exchange membranes 14 are fixedly connected inside the processing box 13; the multiple heat exchange membranes 14 divide the interior of the processing box 13 into an exhaust flow channel and a recovery flow channel; a first fixing rod 15 is fixedly connected inside the shell 1; a moving pipe 16 is slidably connected to the middle of the first fixing rod 15; a connecting frame 17 is fixedly connected to the bottom of the moving pipe 16; multiple pairs of scraper blades 18 are fixedly connected to the bottom of the connecting frame 17; the multiple pairs of scraper blades 18 are slidably connected to the exhaust flow channel separated by the heat exchange membranes 14. Inside the casing 1, a drive assembly is installed. During operation, hot gas emitted from industrial production enters through a pipe from the connecting port 12 at the bottom of the casing 1, passes through the discharge channel inside the treatment chamber 13, and then exits from the outlet at the top of the casing 1. Meanwhile, the fluid used for heat recovery enters through the connecting port 12 on one side of the casing 1, passes through the recovery channel inside the treatment chamber 13, and exits through the connecting port 12 on the other side. Inside the treatment chamber 13, the high-temperature gas in the discharge channel exchanges heat with the fluid in the recovery channel through the heat exchange membrane 14, thus recovering the heat energy from the emitted high-temperature gas. However, since the emitted gas may contain some impurities, these impurities may... Impurities adhering to the surface of the heat exchange membrane 14 can affect its thermal conductivity. Therefore, during operation, the moving tube 16 can be driven by the drive assembly to move repeatedly along the first fixed rod 15, and then the scraper 18 can be driven by the connecting frame 17 to move repeatedly within the discharge channel. The scraper 18 brushes off the impurities adhering to the surface of the heat exchange membrane 14. The brushed-off impurities will leave from the housing 1 with the airflow. Since the exhaust system is usually equipped with a filter mechanism to filter some particulate impurities in the gas, if the filter mechanism is located in the previous process before the heat exchanger, the impurities adhering to the heat exchange membrane 14 and subsequently scraped off are the residual fine particles after being processed by the filter mechanism. The particulate matter is particulate matter that would otherwise be emitted into the external environment. If the filtration mechanism is located after the heat exchanger, the scraped impurities will be discharged from the outer casing 1 with the airflow and then enter the filtration mechanism for processing. Therefore, the scraped impurities can be directly discharged from the outer casing 1 without causing any additional impact on the external environment. The scraped impurities can be directly discharged from the outer casing 1 with the airflow. Through the above structure, the impurities attached to the surface of the heat exchange membrane 14 can be cleaned in time during the heat energy recovery process of the exhaust gas, reducing the occurrence of heat exchange effect reduction caused by impurity adhesion, thereby improving the waste heat recovery effect.

[0027] like Figures 1 to 4As shown, the drive assembly includes a shaft 2, blades 21, and levers 22. The shaft 2 is rotatably connected to the inside of the housing 1. Multiple blades 21 are arranged in a circumferential array and fixed to the middle of the shaft 2. Multiple levers 22 are arranged in a circumferential array and fixed to the middle of the shaft 2. A second fixing rod 23 is fixed to the top of the moving tube 16. One end of the moving tube 16 is fixed to an elastic sleeve 24. The other end of the elastic sleeve 24 is fixed to the side wall of the housing 1. During operation, during gas discharge, the gas flows through multiple blades 21, and the gas blowing on the blades 21 drives the multiple blades 21 and the shaft 2 to rotate. This causes the lever 22 to rotate and move the second fixed rod 23, causing the moving tube 16 to move a certain distance. This drives multiple pairs of scrapers 18 to clean the surface of the heat exchange film 14. After one lever 22 leaves the second fixed rod 23, the moving tube 16 will move back under the pull of the elastic sleeve 24. Therefore, as the airflow continuously impacts the blade 21, it can drive multiple scrapers 18 to continuously clean the heat exchange film 14. Through the above structure, the power of the airflow can be used as a driving force to move the scrapers 18 to clean the surface of the heat exchange film 14. No additional driving device is required, which reduces energy consumption and lowers costs.

[0028] like Figures 1 to 7 As shown, two sets of third fixing rods 3 are fixedly connected inside the outer shell 1; the two sets of third fixing rods 3 are located outside the two ends of the recovery flow channel of the processing box 13; multiple elastic ropes 31 are fixedly connected between the two sets of third fixing rods 3; the multiple elastic ropes 31 pass through the recovery flow channel separated by multiple heat exchange membranes 14; multiple drops 32 are fixedly connected to the middle of the elastic ropes 31; during operation, when the fluid recovering energy flows along the recovery flow channel, the fluid will impact the drops 32 and generate turbulence and eddies, causing the elastic ropes 31 to swing continuously. The continuously swinging elastic ropes 31 and drops 32 will continuously collide with the heat exchange membranes 14, thereby shaking off some impurities on the surface of the heat exchange membranes 14, and also shaking off some bubbles attached to the surface of the heat exchange membranes 14, reducing the impact of bubbles on heat exchange efficiency. Through the above structure, the heat exchange membranes 14 can be made to vibrate continuously, thereby shaking off some impurities and bubbles attached to the heat exchange membranes 14, reducing the impact on heat exchange efficiency, and improving the heat recovery effect.

[0029] like Figures 1 to 4 As shown, a telescopic sleeve 4 is fixedly connected to one end of the moving tube 16 away from the elastic sleeve 24; the other end of the telescopic sleeve 4 is fixedly connected to the side wall of the outer shell 1; when the moving tube 16 moves, the telescopic sleeve 4 will extend and retract synchronously, and cooperate with the elastic sleeve 24 to make it difficult for impurities in the airflow to fall onto the first fixed rod 15. Through the above structure, the occurrence of impurities in the airflow falling onto the first fixed rod 15 and causing an increase in the moving resistance of the moving tube 16 can be reduced, so that the movement of the moving tube 16 remains smooth.

[0030] like Figures 1 to 4As shown, a roller 5 is rotatably connected to the top of the second fixed rod 23; the diameter of the roller 5 is larger than the width of the second fixed rod 23; when the lever 22 rotates, the roller 5 will replace the second fixed rod 23 to contact the lever 22, thereby changing the sliding friction between the lever 22 and the second fixed rod 23 into rolling friction between the roller 5 and the lever 22, reducing transmission resistance, reducing component wear, and improving component service life.

[0031] like Figures 1 to 7 As shown, multiple support strips 6 are fixed between each pair of scraper strips 18. Since the heat exchange efficiency is higher when the interval between multiple heat exchange films 14 is smaller, some scraper strips 18 are relatively thin and are easy to bend and deform and separate from the heat exchange film 14, which affects the cleaning effect on the heat exchange film 14. By setting multiple support strips 6, the occurrence of deformation and separation of a pair of scraper strips 18 from the heat exchange film 14 can be reduced, thereby improving the cleaning effect on the heat exchange film 14.

[0032] like Figure 6 As shown, the heat exchange membrane 14 is arranged in a wavy shape; the scraper 18 is also arranged in a wavy shape to fit the heat exchange membrane 14; through the above structure, the residence time of the emitted high-temperature gas in the treatment box 13 can be increased, so that the high-temperature gas can fully participate in heat exchange and improve the heat recovery effect.

[0033] During operation, hot gas emitted from industrial production enters through a pipe from the connecting port 12 at the bottom of the outer casing 1, passes through the discharge channel inside the treatment chamber 13, and then exits from the outlet at the top of the outer casing 1. Meanwhile, the fluid used for heat recovery enters through the connecting port 12 on one side of the outer casing 1, passes through the recovery channel inside the treatment chamber 13, and exits through the connecting port 12 on the other side. Inside the treatment chamber 13, the high-temperature gas in the discharge channel exchanges heat with the fluid in the recovery channel through the heat exchange membrane 14, thus recovering the heat energy from the emitted high-temperature gas. However, since the emitted gas may contain impurities that may adhere to the surface of the heat exchange membrane 14 and affect its heat conduction, a drive assembly can be used during operation to move the moving pipe 16 along the first fixed rod 1. 5. The device moves repeatedly, thereby driving the scraper 18 to move repeatedly within the discharge channel via the connecting frame 17. The scraper 18 brushes off the impurities adhering to the surface of the heat exchange membrane 14. The brushed-off impurities leave the housing 1 with the airflow. Since the exhaust system is usually equipped with a filter mechanism to filter some particulate impurities in the gas, if the filter mechanism is located before the heat exchanger, the impurities adhering to the heat exchange membrane 14 and subsequently brushed off are the fine particulate matter remaining after being processed by the filter mechanism, which are particulate matter that would have been emitted into the external environment anyway. However, if the filter mechanism is located after the heat exchanger, the brushed-off impurities will enter the filter mechanism for processing after being discharged from the housing 1 with the airflow. Therefore, the brushed-off impurities are directly discharged from the housing 1. It has almost no additional impact on the external environment. Impurities scraped off can be directly discharged from the outer casing 1 with the airflow. During gas discharge, the gas flows through multiple blades 21. The gas blowing onto the blades 21 drives the blades 21 and shaft 2 to rotate, causing the lever 22 to rotate and move the second fixed rod 23, moving the moving tube 16 a certain distance. This causes multiple pairs of scrapers 18 to clean the surface of the heat exchange membrane 14. After one lever 22 leaves the second fixed rod 23, the moving tube 16 moves back under the pull of the elastic sleeve 24. Therefore, as the airflow continuously impacts the blades 21, it drives multiple scrapers 18 to continuously clean the heat exchange membrane 14. When the energy-recovering fluid flows along the recovery channel, the fluid impacts the drop beads 3. 2. Turbulence and eddies are generated, causing the elastic rope 31 to swing continuously. The swinging elastic rope 31 and the dropper 32 will continuously collide with the heat exchange membrane 14, thereby shaking off some impurities on the surface of the heat exchange membrane 14 and some air bubbles attached to the surface of the heat exchange membrane 14, reducing the impact of air bubbles on heat exchange efficiency. When the moving tube 16 moves, the telescopic sleeve 4 will extend and retract synchronously, and together with the elastic sleeve 24, it will be difficult for impurities in the airflow to fall onto the first fixed rod 15. When the lever 22 rotates, the roller 5 will replace the second fixed rod 23 to contact the lever 22, thereby changing the sliding friction between the lever 22 and the second fixed rod 23 into rolling friction between the roller 5 and the lever 22. Since the spacing between the multiple heat exchange membranes 14 is smaller,Higher heat exchange efficiency means that some scraper strips 18 will be thinner, making them prone to bending, deformation, and separation from the heat exchange film 14, thus affecting the cleaning effect on the heat exchange film 14. The use of multiple support strips 6 can reduce the occurrence of deformation and separation of a pair of scraper strips 18 from the heat exchange film 14.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger with waste heat recovery comprising a housing (1); characterized in that: The outer shell (1) has multiple connecting ports (12) fixed to its side walls and bottom; a processing box (13) is installed inside the outer shell (1); multiple heat exchange membranes (14) are fixed inside the processing box (13); the multiple heat exchange membranes (14) divide the interior of the processing box (13) into a discharge channel and a recovery channel; a first fixing rod (15) is fixed inside the outer shell (1); a moving tube (16) is slidably connected to the middle of the first fixing rod (15); a connecting frame (17) is fixed to the bottom of the moving tube (16); multiple pairs of scrapers (18) are fixed to the bottom of the connecting frame (17); the multiple pairs of scrapers (18) are slidably connected to the discharge channel separated by the heat exchange membranes (14); a drive assembly is installed inside the outer shell (1).

2. A heat exchanger with waste heat recovery as claimed in claim 1, wherein: The drive assembly includes a shaft (2), blades (21), and levers (22); the shaft (2) is rotatably connected to the inside of the housing (1); multiple blades (21) are arranged in a circumferential array and fixed to the middle of the shaft (2); multiple levers (22) are arranged in a circumferential array and fixed to the middle of the shaft (2); a second fixing rod (23) is fixed to the top of the moving tube (16); an elastic sleeve (24) is fixed to one end of the moving tube (16); and the other end of the elastic sleeve (24) is fixed to the side wall of the housing (1).

3. A heat exchanger with waste heat recovery as claimed in claim 1, wherein: Two sets of third fixing rods (3) are fixed inside the outer shell (1); the two sets of third fixing rods (3) are located outside the two ends of the recycling channel of the processing box (13); multiple elastic ropes (31) are fixed between the two sets of third fixing rods (3); the multiple elastic ropes (31) pass through the recycling channel separated by multiple heat exchange membranes (14); multiple beads (32) are fixed in the middle of the elastic ropes (31).

4. A heat exchanger with waste heat recovery as claimed in claim 2, wherein: The movable tube (16) is fixed to a telescopic sleeve (4) at one end away from the elastic sleeve (24); the other end of the telescopic sleeve (4) is fixed to the side wall of the outer shell (1).

5. A heat exchanger with waste heat recovery as claimed in claim 2, wherein: A roller (5) is rotatably connected to the top of the second fixing rod (23); the diameter of the roller (5) is greater than the width of the second fixing rod (23).

6. A heat exchanger with waste heat recovery as claimed in claim 1, wherein: Multiple support strips (6) are fixed between each pair of scraper strips (18).

7. A heat exchanger with waste heat recovery as claimed in claim 1, wherein: The heat exchange membrane (14) is arranged in a wavy shape; the scraper (18) is also arranged in a wavy shape to fit the heat exchange membrane (14).

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