Adsorption type drying machine utilizing waste heat for regeneration

Abstract

The invention relates to the technical field of drying machines, and discloses an adsorption type drying machine utilizing waste heat for regeneration, which comprises a compressor, a drying tower A and a drying tower B. A heat exchanger is arranged between the drying tower A and the drying tower B. Compressed air in the compressor enters the drying tower A or the drying tower B after passing through the heat exchanger. And part of the dried gas in the drying tower A or the drying tower B enters the heat exchanger for heat exchange and temperature rise, and then enters the drying tower B or the drying tower A to regenerate the drying agent. The heat exchanger is matched with the compressor, heat carried by compressed air in the compressor is transferred into regenerated gas on the other side of the heat exchanger, the temperature of the regenerated gas is increased, and therefore the requirement for external energy is reduced, heat pollution to the environment and energy consumption can be reduced, and meanwhile the utilization efficiency of the energy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of adsorption dryers, and particularly to an adsorption dryer using waste heat regeneration. Background Art

[0002] An adsorption dryer is a device used to dry compressed air. It adsorbs moisture in the compressed air through an adsorbent to achieve the purpose of drying. After the humid compressed air enters the adsorption dryer, it passes through adsorbents such as activated alumina and molecular sieve, and the moisture is adsorbed by the adsorbent, so that the compressed air is dried. When the adsorbent adsorbs moisture to saturation, the moisture in the adsorbent is desorbed by heating or depressurizing, etc., so that the adsorbent restores its adsorption capacity. At the same time, the heat of the high-temperature exhaust gas of the air compressor is directly used to heat the regenerated desiccant, canceling the electric heater of the micro-heat regeneration type, which not only reduces the dependence on external energy, but also has remarkable energy-saving effect. Long-term operation can save a large amount of energy costs for enterprises. Herein, the present invention proposes an adsorption dryer using waste heat regeneration.

[0003] According to the search, the Chinese patent document, publication number: CN216604645U, discloses a waste heat regeneration device in an adsorption dryer. By arranging multiple groups of adsorbent tubes on the sieve plate, the compressed air is shunted, and the structure of an expansion joint is adopted to reduce the stress on the tube wall of the adsorbent tube and the pressure on the molecular sieve on the inner wall, thereby achieving the effect of protecting the adsorbent tube and prolonging the service life. However, during the actual use of this device, the waste heat of the compressor exhaust is directly discharged and cannot be effectively utilized, reducing the overall practicality. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an adsorption dryer using waste heat regeneration, which has the advantages of remarkable energy saving, high regeneration efficiency, and extended service life, and solves the above technical problems.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: An adsorption dryer using waste heat regeneration, including a compressor, drying tower A and drying tower B. A heat exchanger is arranged between drying tower A and drying tower B. The compressed air in the compressor enters drying tower A or drying tower B after passing through the heat exchanger. Part of the dried gas in drying tower A or drying tower B enters the heat exchanger to be heated and then enters drying tower B or drying tower A to regenerate the desiccant.

[0008] Further, a first connecting pipe is fixedly installed at the air outlet of the compressor. The lower ends of the drying tower A and the drying tower B are connected with a second connecting pipe. A third connecting pipe is fixedly installed on the outer side of the second connecting pipe. Both ends of the third connecting pipe are respectively connected with the lower ends of the drying tower A and the drying tower B. A second exhaust pipe is fixedly installed in the middle of the third connecting pipe. A base is fixedly installed on the outer side of the drying tower A. A heat exchanger is fixedly installed on the base. The first connecting pipe is connected with the heat source inlet of the heat exchanger. The heat source outlet of the heat exchanger is connected with a third exhaust pipe. The third exhaust pipe is fixedly connected with a cooler. The air outlet of the cooler is connected with the middle of the second connecting pipe through a first air pipe.

[0009] Further, a fourth connecting pipe is fixedly connected between the upper ends of the drying tower A and the drying tower B. A fifth connecting pipe and a sixth connecting pipe are fixedly installed on the fourth connecting pipe. The fifth connecting pipe is connected with one side cold source interface of the heat exchanger. The sixth connecting pipe is connected with the other side cold source interface of the heat exchanger. A fourth exhaust pipe is fixedly connected in the middle of the fourth connecting pipe. First control valves for controlling the on-off of the pipeline are respectively connected to both ends of the second connecting pipe close to the drying tower A and the drying tower B. Second control valves for controlling the on-off of the pipeline are respectively connected to both sides of the second exhaust pipe on the third connecting pipe. Third control valves for controlling the on-off of the pipeline are respectively connected to both sides of the fourth exhaust pipe on the fourth connecting pipe.

[0010] Further, drying adsorbent layers are arranged inside both the drying tower A and the drying tower B. The drying adsorbent layer includes a first drying layer and a second drying layer. An interval cavity is arranged between the first drying layer and the second drying layer. The first drying layer and the second drying layer are filled with bentonite desiccant or silica gel desiccant.

[0011] Further, a rotating shaft and a spiral blade are rotatably arranged in both the fifth connecting pipe and the sixth connecting pipe. The spiral blade is fixed on the rotating shaft. The lower end of the rotating shaft extends to the outside of the connecting pipe and is fixedly connected with a first bevel gear. Pushing devices are arranged on both the drying tower A and the drying tower B. The pushing device includes a second rotating shaft rotatably connected to the side walls of the drying tower A and the drying tower B. One end of the second rotating shaft extends to the outside of the tower and is connected with a second bevel gear through a one-way transmission device. The second bevel gear is in meshing transmission with the first bevel gear through gears. One end of the second rotating shaft extending into the tower is fixedly connected with a turntable. An arm is eccentrically connected to the turntable. The first drying layer is fixed inside the drying tower. The second drying layer is in sliding fit inside the drying tower. A push rod is fixedly connected above the second drying layer. The upper end of the push rod is hinged to the arm. The rotation of the turntable drives the second drying layer to move up and down through the arm to compress and suck the gas between the first drying layer and the second drying layer, thereby accelerating the water in the drying layer to be carried out by the compressed gas.

[0012] Further, the one-way transmission device includes a ratchet fixed on the second rotating shaft. Tooth grooves are provided on the inner wall of the ratchet. A third rotating shaft is rotatably connected inside the ratchet, and the third rotating shaft is fixedly connected with a second bevel gear; a pawl is hinged on the third rotating shaft, and the end of the pawl is caught in the tooth groove. A spring is arranged on the third rotating shaft, and the spring abuts against the pawl to push the pawl into the tooth groove. By arranging the one-way transmission device, when the regeneration gas in the heat exchanger enters the drying tower, it drives the second drying layer in the corresponding drying tower to move up and down, while the second drying layer in the other drying tower remains stationary.

[0013] Further, the end of the first connecting pipe far away from the compressor is fixedly connected to the right side surface of the heat exchanger.

[0014] Further, the end of the fifth connecting pipe far away from the fourth connecting pipe is fixedly connected to the left side surface of the heat exchanger, and the end of the sixth connecting pipe far away from the fourth connecting pipe is fixedly connected to the right side surface of the heat exchanger. Pressure regulating valves are fixedly installed on the fifth connecting pipe and the sixth connecting pipe.

[0015] Further, a silencer is fixedly installed on the second exhaust pipe.

[0016] Further, a controller is fixedly installed on the front side surface of the base. The controller is electrically connected to the first control valve, the second control valve, and the third control valve to issue instructions to make the first control valve, the second control valve, and the third control valve control the on-off of the pipeline.

[0017] Compared with the prior art, the present invention provides an adsorption dryer using waste heat regeneration, which has the following beneficial effects: By arranging two drying towers to alternately dry the compressed air output by the compressor, dry compressed air can be continuously output; while one drying tower A dries the compressed air, high-temperature gas heated by the heat exchanger is reversely input into the other drying tower B to regenerate the desiccant in the drying tower B, so as to automatically regenerate the desiccant while drying the compressed air, thus ensuring the ability to continuously dry the compressed air; By cooperating the heat exchanger with the compressor, the heat carried by the compressed air in the compressor is transferred to the regeneration gas on the other side of the heat exchanger to increase its temperature, thereby reducing the demand for external energy. It can not only reduce the thermal pollution and energy consumption of the environment, but also improve the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an adsorption dryer using waste heat regeneration provided by the present invention;

[0019] Figure 2A three-dimensional schematic diagram of a partial structure of a heat exchanger part of an adsorption dryer using waste heat regeneration provided by the present invention;

[0020] Figure 3 A partial sectional structure schematic diagram of a drying tower of an adsorption dryer using waste heat regeneration in another embodiment of the present invention;

[0021] Figure 4 For Figure 3 An enlarged schematic diagram of the partial structure of part F in

[0022] Figure 5 A side view structure schematic diagram of the cooperation between a turntable and a rocker arm in an adsorption dryer using waste heat regeneration provided by the present invention;

[0023] Figure 6 A sectional structure schematic diagram of a one-way transmission device in an adsorption dryer using waste heat regeneration provided by the present invention.

[0024] Wherein: 1. Compressor; 2. Cooler; 3. First connecting pipe; 4. Second connecting pipe; 5. Third connecting pipe; 6. Second exhaust pipe; 7. Drying tower A; 8. Drying tower B; 9. Base; 10. Controller; 11. Heat exchanger; 12. Third exhaust pipe; 13. Fourth connecting pipe; 14. Fifth connecting pipe; 15. Sixth connecting pipe; 16. Fourth exhaust pipe; 17. Drying adsorbent layer; 18. First drying layer; 19. Second drying layer; 20. First gas transmission pipe; 21. First control valve; 22. Second control valve; 23. Third control valve; 24. Pressure regulating valve; 25. Muffler; 26. Rotating shaft; 27. Spiral blade; 28. First bevel gear; 30. Pushing device; 31. Second rotating shaft; 32. Second bevel gear; 33. Turntable; 34. Rocker arm; 35. Push-pull rod; 40. One-way transmission device; 41. Ratchet; 42. Tooth groove; 43. Third rotating shaft; 44. Pawl; 45. Spring. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figure 1-2, An adsorption dryer using waste heat regeneration, comprising a compressor 1, a drying tower A 7 and a drying tower B 8. A heat exchanger 11 is arranged between the drying tower A 7 and the drying tower B 8. The compressed air in the compressor 1 enters the drying tower A 7 or the drying tower B 8 after passing through the heat exchanger 11. Part of the dried gas in the drying tower A 7 or the drying tower B 8 enters the heat exchanger 11 to be heated and then enters the drying tower B 8 or the drying tower A 7 to regenerate the desiccant.

[0027] With the above technical solution, by setting two drying towers to alternately dry the compressed air output by the compressor 1, dry compressed air can be continuously output. While one drying tower A 7 dries the compressed air, high-temperature gas heated by the heat exchanger 11 is reversely input into the other drying tower B 8 to regenerate the desiccant in the drying tower B 8. Thus, while drying the compressed air, the desiccant can be automatically regenerated, ensuring the ability to continuously dry the compressed air. By cooperating the heat exchanger 11 with the compressor 1, the heat carried by the compressed air in the compressor 1 is transferred to the regeneration gas on the other side of the heat exchanger 11, raising its temperature. This reduces the demand for external energy, not only reducing the thermal pollution and energy consumption of the environment, but also improving the energy utilization efficiency.

[0028] Specifically, a first connecting pipe 3 is fixedly installed at the air outlet of the compressor 1. The lower ends of the drying tower A 7 and the drying tower B 8 are connected with a second connecting pipe 4. A third connecting pipe 5 is fixedly installed on the outer side of the second connecting pipe 4. The two ends of the third connecting pipe 5 are respectively connected to the lower ends of the drying tower A 7 and the drying tower B 8. A second exhaust pipe 6 is fixedly installed in the middle of the third connecting pipe 5. A base 9 is fixedly installed on the outer side of the drying tower A 7;

[0029] A heat exchanger 11 is fixedly installed on the base 9. The first connecting pipe 3 is connected to the heat source inlet of the heat exchanger 11. The heat source outlet of the heat exchanger 11 is connected with a third exhaust pipe 12. The third exhaust pipe 12 is fixedly connected to the cooler 2. The air outlet of the cooler 2 is connected to the middle of the second connecting pipe 4 through a first air pipe 20.

[0030] Specifically, a fourth communication pipe 13 is fixedly connected between the upper ends of the drying tower A7 and the drying tower B8. A fifth communication pipe 14 and a sixth communication pipe 15 are fixedly installed on the fourth communication pipe 13. The fifth communication pipe 14 is connected to the cold source interface on one side of the heat exchanger 11, and the sixth communication pipe 15 is connected to the cold source interface on the other side of the heat exchanger 11. A fourth exhaust pipe 16 is fixedly connected to the middle of the fourth communication pipe 13. First control valves 21 for controlling the on-off of the pipeline are respectively connected to both ends of the second communication pipe 4 close to the drying tower A7 and the drying tower B8. Second control valves 22 for controlling the on-off of the pipeline are respectively connected to both sides of the second exhaust pipe 6 on the third communication pipe 5. Third control valves 23 for controlling the on-off of the pipeline are respectively connected to both sides of the fourth exhaust pipe 16 on the fourth communication pipe 13.The advantages are as follows. The on-off of the pipeline can be controlled by the control valve, and the control valve can cooperate with the controller 10 to realize the automatic operation of the drying towers A7 and B8 for alternating drying and regeneration, reducing manual intervention and improving drying efficiency. During operation, the compressed air output by the compressor 1 is conveyed to the heat exchanger 11 through the first connecting pipe 3. Since the temperature of the compressed air directly output by the compressor 1 rises after compression, the directly output compressed air serves as the heat source of the heat exchanger 11 to heat the regeneration gas entering the heat exchanger 11. After heat exchange with the heat source compressed air in the heat exchanger 11, it is input to the cooler 2 for cooling. The first control valve 21 on the left side of the second connecting pipe 4 opens the pipeline, and the first control valve 21 on the right side closes the pipeline. The second control valve 22 on the left side of the third connecting pipe 5 closes the pipeline, and the second control valve 22 on the right side opens the pipeline. The third control valve 23 on the left side of the fourth connecting pipe 13 opens the pipeline, while the third control valve 23 on the right side closes the pipeline, so that the cooled compressed air enters the drying tower A7 through the left pipeline for drying. The dried compressed air is conveyed through the fourth exhaust pipe 16 to the external using equipment for use through the fourth connecting pipe 13. Part of the dried compressed air in the fourth connecting pipe 13 is diverted into the fifth connecting pipe 14 and enters the heat exchanger 11 for heating. The heated high-temperature compressed air enters the upper end of the drying tower B8 through the sixth connecting pipe 15 to regenerate the desiccant in the drying tower B8. Under the action of the high-temperature compressed air, the moisture in the desiccant in the drying tower B8 enters the third connecting pipe 5 with the compressed air from the lower end of the drying tower B8 and is discharged from the second exhaust pipe 6, thereby discharging the moisture in the desiccant in the drying tower B8 and realizing the regeneration of the desiccant. After the drying tower A7 dries the compressed air for a period of time, the control valve switches to control the on-off of the pipeline, controls the first control valve 21 on the left side of the second connecting pipe 4 to close the pipeline, the first control valve 21 on the right side to open the pipeline, the second control valve 22 on the left side of the third connecting pipe 5 to open the pipeline, the second control valve 22 on the right side to close the pipeline, the third control valve 23 on the left side of the fourth connecting pipe 13 to close the pipeline, and the third control valve 23 on the right side to open the pipeline. Similarly, the compressed air cooled by the heat exchanger 11 enters the drying tower B8 through the right pipeline of the second connecting pipe 4 for drying. The dried gas is conveyed through the fourth exhaust pipe 16 to the external using equipment for use. Part of the dried gas enters the drying tower A7 to regenerate the desiccant in the tower, and the air that absorbs the moisture in the desiccant enters the third connecting pipe 5 and is discharged through the second exhaust pipe 6.

[0031] Specifically, a drying adsorbent layer 17 is provided inside both the drying tower A7 and the drying tower B8, and the drying adsorbent layer 17 includes a first drying layer 18 and a second drying layer 19. A spaced cavity is provided between the first drying layer 18 and the second drying layer 19. The first drying layer 18 and the second drying layer 19 are filled with bentonite desiccant or silica gel desiccant. With this structure, the first drying layer 18 can quickly adsorb a large amount of moisture, reducing the overall humidity of the air, while the second drying layer 19 can still efficiently remove trace moisture, thereby effectively adsorbing and removing the moisture in the compressed air; and filling the inside with bentonite desiccant or silica gel desiccant can regenerate the water absorption capacity under heating. During the alternating regeneration process, the moisture adsorbed in the desiccant volatilizes and is discharged in a high-temperature environment, thereby facilitating the regeneration of the adsorbent and ensuring the overall ability to continuously adsorb moisture.

[0032] In another embodiment, as Figures 3-6As shown, a rotating shaft 26 and a spiral blade 27 are rotatably arranged in both the fifth connecting pipe 14 and the sixth connecting pipe 15. The spiral blade 27 is fixed on the rotating shaft 26. The lower end of the rotating shaft 26 extends to the outside of the connecting pipe and is fixedly connected with a first bevel gear 28. A pushing device 30 is arranged on both the drying tower A7 and the drying tower B8. The pushing device 30 includes a second rotating shaft 31 rotatably connected to the side walls of the drying tower A7 and the drying tower B8. One end of the second rotating shaft 31 extends to the outside of the tower and is fixedly connected with a second bevel gear 32 through a one-way transmission device 40. The second bevel gear 32 is in meshing transmission with the first bevel gear 28 through gears. One end of the second rotating shaft 31 extending into the tower is fixedly connected with a turntable 33. An eccentric arm 34 is connected to the turntable 33; the first drying layer 18 is fixed inside the drying tower, and the second drying layer 19 is slidably fitted inside the drying tower. A push rod 35 is fixedly connected above the second drying layer 19. The upper end of the push rod 35 is hinged to the eccentric arm 34. The rotation of the turntable 33 drives the second drying layer 19 to move up and down through the eccentric arm 34, compressing and sucking the gas between the first drying layer 18 and the second drying layer 19, thereby accelerating the removal of moisture in the drying layer by the compressed gas. During operation, the heat generated when the compressor 1 compresses air is used to heat the gas that enters the drying tower from the upper end to regenerate the desiccant. The regenerating gas entering the drying tower regenerates the desiccant under high-temperature conditions, causing the moisture in the desiccant to be discharged and discharged out of the drying tower along with the regenerating gas. Thus, while drying the compressed air, the desiccant is automatically regenerated, and through the cyclic operation of the two drying towers, continuous drying of the compressed air is achieved; when the compressed air for regeneration enters the drying tower through the fifth connecting pipe 14 or the sixth connecting pipe 15, it drives the spiral blade 27 to rotate, thereby driving the second rotating shaft 31 to rotate through gear transmission. The rotation of the second rotating shaft 31 drives the turntable 33 to rotate, driving the eccentric arm 34 to drive the second drying layer 19 to move up and down. The up and down movement of the second drying layer 19 causes the space of the cavity between the first drying layer 18 and the second drying layer 19 to cyclically increase and decrease, causing the gas in the cavity to be squeezed and compressed or sucked, thereby facilitating the removal of moisture in the drying layer by the regenerating gas; at the same time, since the fifth connecting pipe 14 and the sixth connecting pipe 15 are provided with spiral blades 27, the spiral blades 27 can slow down and block the incoming air, preventing too much compressed air in the fourth connecting pipe 13 from flowing into the regeneration pipeline, and slowing down the flow rate of the compressed air when it enters the heat exchanger 11, facilitating sufficient heat exchange in the heat exchanger 11, so that the temperature of the air entering the drying tower can reach the temperature required for regeneration.

[0033] Specifically, the one-way transmission device 40 includes a ratchet wheel 41 fixed on the second rotating shaft 31. Tooth grooves 42 are provided on the inner wall of the ratchet wheel 41. A third rotating shaft 43 is rotatably connected inside the ratchet wheel 41, and the third rotating shaft 43 is fixedly connected to the second bevel gear 32. A pawl 44 is hingedly connected to the third rotating shaft 43, and the end of the pawl 44 is inserted into the tooth groove 42. A spring 45 is provided on the third rotating shaft 43, and the spring 45 abuts against the pawl 44 to push the pawl 44 into the tooth groove 42. By providing the one-way transmission device 40, when the regeneration gas enters the drying tower in the heat exchanger 11, it drives the second drying layer 19 in the corresponding drying tower to move up and down, while the second drying layer 19 in the other drying tower remains stationary.

[0034] Specifically, the end of the first connecting pipe 3 away from the compressor 1 is fixedly connected to the right side surface of the heat exchanger 11. The advantage is that, through this structure, the gas discharged from the compressor 1 through the first connecting pipe 3 usually has a relatively high temperature and contains a large amount of heat energy. After connecting the first connecting pipe 3 to the inside of the heat exchanger 11, this heat energy can be transferred to the low-temperature medium on the other side of the heat exchanger, and then can be used to heat the regeneration air entering the drying tower, reducing the extra consumed energy, realizing the recovery and reuse of heat energy, and reducing the production cost.

[0035] Specifically, the end of the fifth connecting pipe 14 away from the fourth connecting pipe 13 is fixedly connected to the left side surface of the heat exchanger 11, and the end of the sixth connecting pipe 15 away from the fourth connecting pipe 13 is fixedly connected to the right side surface of the heat exchanger 11. Pressure regulating valves 24 are fixedly installed on the fifth connecting pipe 14 and the sixth connecting pipe 15. The advantage is that, through this structure, when the gas enters the inside of the heat exchanger 11 through the fifth connecting pipe 14 and the sixth connecting pipe 15, the heat exchanger 11 can transfer the heat energy in the first connecting pipe 3 to the regeneration gas, increasing its temperature, thereby reducing the demand for external energy. It can not only reduce the thermal pollution and energy consumption of the environment, but also improve the energy utilization efficiency. In addition, the pressure regulating valve 24 can accurately adjust the pressure of the regeneration gas according to actual needs to keep it stable, thus ensuring the consistency and stability of the drying effect and protecting the safe operation of the equipment. The heat exchanger 11 adopts a heat pipe type heat exchanger, and its structural parts are all existing technologies, so its working principle and the like will not be elaborated.

[0036] Specifically, a silencer 25 is fixedly installed on the second exhaust pipe 6. The advantage is that, through this structure, the silencer 25 can effectively reduce the noise level, contribute to improving the acoustic environment of the workplace, reduce the harm of noise to the operators, protect the hearing and physical and mental health of the operators, improve the work efficiency and work quality, and at the same time reduce the pollution to the surrounding environment.

[0037] Specifically, a controller 10 is fixedly installed on the front side of the base 9. The controller 10 is electrically connected to the first control valve, the second control valve, and the third control valve to issue instructions to enable the first control valve, the second control valve, and the third control valve to control the on-off of the pipeline.

[0038] The working principle is as follows: During use, the first connecting pipe 3 is connected to the inside of the heat exchanger 11. Since the gas discharged from the compressor 1 through the first connecting pipe 3 usually has a relatively high temperature and contains a large amount of heat energy, and when the regeneration gas enters the inside of the heat exchanger 11, this heat can be transferred to the regeneration gas on the other side of the heat exchanger, increasing its temperature, thereby reducing the demand for external energy. This not only reduces the thermal pollution and energy consumption of the environment but also improves the energy utilization efficiency. Additionally, the pressure regulating valve 24 can precisely adjust the pressure of the regeneration gas according to actual needs to keep it stable, thus ensuring the consistency and stability of the drying effect and protecting the safe operation of the equipment. The compressed air output by the compressor 1 is transported to the heat exchanger 11 through the first connecting pipe 3. Since the compressed air directly output by the compressor 1 has its temperature rise after compression, the directly output compressed air serves as the heat source of the heat exchanger 11 to heat the regeneration gas entering the heat exchanger 11. After the heat exchange between the heat source compressed air of the heat exchanger 11, it is input to the cooler 2 for cooling. The first control valve 21 on the left side of the second connecting pipe 4 opens the pipeline, the first control valve 21 on the right side closes the pipeline, the second control valve 22 on the left side of the third connecting pipe 5 closes the pipeline, the second control valve 22 on the right side opens the pipeline, the third control valve 23 on the left side of the fourth connecting pipe 13 opens the pipeline, and the third control valve 23 on the right side closes the pipeline, so that the cooled compressed air enters the drying tower A7 through the left pipeline for drying. The dried compressed air is transported through the fourth exhaust pipe 16 of the fourth connecting pipe 13 to external using equipment for use. Part of the dried compressed air in the fourth connecting pipe 13 is shunted into the fifth connecting pipe 14 and enters the heat exchanger 11 for heating. The heated high-temperature compressed air enters the upper end of the drying tower B8 through the sixth connecting pipe 15 to regenerate the desiccant in the drying tower B8. Under the action of the high-temperature compressed air, the moisture in the desiccant in the drying tower B8 enters the third connecting pipe 5 with the compressed air from the lower end of the drying tower B8 and is discharged through the second exhaust pipe 6, thereby discharging the moisture in the desiccant in the drying tower B8 and realizing the regeneration of the desiccant. After the drying tower A7 has dried the compressed air for a period of time, the control valve switches to control the on-off of the pipeline, controlling the first control valve 21 on the left side of the second connecting pipe 4 to close the pipeline, the first control valve 21 on the right side to open the pipeline, the second control valve 22 on the left side of the third connecting pipe 5 to open the pipeline, the second control valve 22 on the right side to close the pipeline, the third control valve 23 on the left side of the fourth connecting pipe 13 to close the pipeline, and the third control valve 23 on the right side to open the pipeline. Similarly, the compressed air cooled by the heat exchanger 11 enters the drying tower B8 through the right pipeline of the second connecting pipe 4 for drying. The dried gas is transported through the fourth exhaust pipe 16 to external using equipment for use. Part of the dried gas enters the drying tower A7 to regenerate the desiccant in the tower, and the air that absorbs the moisture in the desiccant enters the third connecting pipe 5 and is discharged through the second exhaust pipe 6;When the compressed air for regeneration enters the drying tower through the fifth connecting pipe 14 or the sixth connecting pipe 15, it drives the spiral blade 27 to rotate, thereby driving the second rotating shaft 31 to rotate through gear transmission. The rotation of the second rotating shaft 31 drives the turntable 33 to rotate, driving the swing arm 34 to drive the second drying layer 19 to move up and down. The up and down movement of the second drying layer 19 causes the space of the cavity between the first drying layer 18 and the second drying layer 19 to cycle and increase and decrease, so that the gas in the cavity is squeezed and compressed or sucked, which is conducive to the moisture in the drying layer being carried out by the regeneration gas. At the same time, since the spiral blade 27 is provided in the fifth connecting pipe 14 and the sixth connecting pipe 15, the spiral blade 27 can slow down and block the incoming air, prevent too much compressed air in the fourth connecting pipe 13 from flowing into the regeneration pipeline, and slow down the flow rate of the compressed air when it enters the heat exchanger 11, which is convenient for sufficient heat exchange in the heat exchanger 11, so that the temperature of the air entering the drying tower can reach the temperature required for regeneration.

[0039] For the parts not involved in the above technical solution, the prior art can be adopted to implement them.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adsorption dryer utilizing waste heat regeneration, characterized in that: The invention comprises a compressor (1), a drying tower A (7) and a drying tower B (8), wherein a heat exchanger (11) is arranged between the drying tower A (7) and the drying tower B (8), wherein the compressed air in the compressor (1) passes through the heat exchanger (11) and then enters the drying tower A (7) or the drying tower B (8), wherein the gas portion after drying in the drying tower A (7) or the drying tower B (8) enters the heat exchanger (11) for heat exchange and temperature increase and then enters the drying tower B (8) or the drying tower A (7) for regenerating the desiccant.

2. The adsorption dryer utilizing waste heat regeneration according to claim 1, characterized in that: A first connecting pipe (3) is fixedly installed at the air outlet of the compressor (1); the lower ends of the drying tower A (7) and the drying tower B (8) are connected to a second connecting pipe (4); a third connecting pipe (5) is fixedly installed on the outer side of the second connecting pipe (4); the two ends of the third connecting pipe (5) are respectively connected to the lower ends of the drying tower A (7) and the drying tower B (8); a second exhaust pipe (6) is fixedly installed in the middle of the third connecting pipe (5); a base (9) is fixedly installed on the outer side of the drying tower A (7); a heat exchanger (11) is fixedly installed on the base (9); the first connecting pipe (3) is connected to the heat source inlet of the heat exchanger (11); the heat source outlet of the heat exchanger (11) is connected to the third exhaust pipe (12); the third exhaust pipe (12) is fixedly connected to the cooler (2); the air outlet of the cooler (2) is connected to the middle of the second connecting pipe (4) through a first air supply pipe (20).

3. The adsorption dryer utilizing waste heat regeneration according to claim 2, characterized in that: A fourth connecting pipe (13) is fixedly connected between the upper ends of the drying tower A (7) and the drying tower B (8); a fifth connecting pipe (14) and a sixth connecting pipe (15) are fixedly installed on the fourth connecting pipe (13); the fifth connecting pipe (14) is connected to a cold source interface on one side of the heat exchanger (11), and the sixth connecting pipe (15) is connected to a cold source interface on the other side of the heat exchanger (11); a fourth exhaust pipe (16) is fixedly connected to the middle of the fourth connecting pipe (13); two ends of the second connecting pipe (4) close to the drying tower A (7) and the drying tower B (8) are respectively connected to first control valves (21) for controlling the on-off of the pipeline; two sides of the second exhaust pipe (6) on the third connecting pipe (5) are respectively connected to second control valves (22) for controlling the on-off of the pipeline; and two sides of the fourth exhaust pipe (16) on the fourth connecting pipe (13) are respectively connected to third control valves (23) for controlling the on-off of the pipeline.

4. The adsorption dryer utilizing waste heat regeneration according to claim 3, characterized in that: The drying tower A (7) and the drying tower B (8) are both provided with a drying adsorbent layer (17), and the drying adsorbent layer (17) comprises a first drying layer (18) and a second drying layer (19), a spacing cavity is provided between the first drying layer (18) and the second drying layer (19), and the first drying layer (18) and the second drying layer (19) are filled with bentonite desiccant or silica gel desiccant.

5. The adsorption dryer utilizing waste heat regeneration according to claim 4, characterized in that: The fifth connecting pipe (14) and the sixth connecting pipe (15) are both rotatably provided with a rotating shaft (26) and a spiral blade (27), the spiral blade (27) being fixed on the rotating shaft (26), the lower end of the rotating shaft (26) extending to the outside of the connecting pipe and being fixedly connected to a first bevel gear (28), the drying tower A (7) and the drying tower B (8) are both provided with a pushing device (30), the pushing device (30) comprising a second rotating shaft (31) rotatably connected to the side wall of the drying tower A (7) and the drying tower B (8), one end of the second rotating shaft (31) extending to the outside of the tower and being fixedly connected to a second bevel gear (32) via a one-way transmission device (40), the second bevel gear (32) The second rotating shaft (31) is meshed with the first bevel gear (28) through gear transmission, and the second rotating shaft (31) extends to one end in the tower and is fixedly connected to a rotating disk (33), and a rocker arm (34) is eccentrically connected to the rotating disk (33); the first drying layer (18) is fixed in the drying tower, and the second drying layer (19) is slidably fitted in the drying tower. A push-pull rod (35) is fixedly connected above the second drying layer (19), and the upper end of the push-pull rod (35) is hinged to the rocker arm (34). The rotating disk (33) rotates through the rocker arm (34) to drive the second drying layer (19) to move up and down, compressing and sucking the gas between the first drying layer (18) and the second drying layer (19), thereby accelerating the removal of moisture in the drying layer by the compressed gas.

6. The adsorption dryer utilizing waste heat regeneration according to claim 5, characterized in that: The one-way transmission device (40) comprises a ratchet (41) fixed on the second rotating shaft (31), a tooth groove (42) is arranged on the inner wall of the ratchet (41), a third rotating shaft (43) is rotatably connected inside the ratchet (41), and the third rotating shaft (43) is fixedly connected to the second bevel gear (32); a ratchet pawl (44) is hingedly connected to the third rotating shaft (43), an end of the ratchet pawl (44) is inserted into the tooth groove (42), and a spring (45) is arranged on the third rotating shaft (43), and the spring (45) abuts against the ratchet pawl (44) to push the ratchet pawl (44) into the tooth groove (42).

7. The adsorption dryer utilizing waste heat regeneration according to claim 5, characterized in that: One end of the first connecting pipe (3) away from the compressor (1) is fixedly connected to the right side surface of the heat exchanger (11).

8. The adsorption dryer utilizing waste heat regeneration according to claim 5, characterized in that: One end of the fifth connecting pipe (14) away from the fourth connecting pipe (13) is fixedly connected to the left side surface of the heat exchanger (11), and one end of the sixth connecting pipe (15) away from the fourth connecting pipe (13) is fixedly connected to the right side surface of the heat exchanger (11), and pressure regulating valves (24) are fixedly installed on the fifth connecting pipe (14) and the sixth connecting pipe (15).

9. The adsorption dryer utilizing waste heat regeneration according to claim 5, characterized in that: A muffler (25) is fixedly mounted on the second exhaust pipe (6).

10. An adsorption dryer utilizing waste heat regeneration according to any one of claims 1 to 9, characterized in that: A controller (10) is fixedly mounted on the front side of the base (9); the controller (10) is electrically connected to the first control valve (21), the second control valve (22), and the third control valve (23) to issue instructions so that the first control valve (21), the second control valve (22), and the third control valve (23) can perform on-off control on the pipeline.

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