Cyclic regeneration drying machine

Abstract

The utility model provides a cyclic regeneration suction dryer, which comprises two adsorption towers, a first control valve, a second control valve, a third control valve, a fourth control valve, a fourth control valve and a fourth control valve, each regeneration device comprises a gas-guide tube which is spirally wound from top to bottom, two ends of the gas-guide tube are hermetically connected with the inner ends of the first control valves on the upper side and the lower side respectively, the gas-guide tube is integrally tower-shaped, and a plurality of gas outlets penetrate through the side wall of the gas-guide tube; two gas outlet ends of the gas inlet pipeline are respectively communicated with the bottoms of the two adsorption towers and are respectively controlled by a second control valve to open and close; two gas inlet ends of the gas exhaust pipeline are respectively communicated with the bottoms of the two adsorption towers and are respectively controlled by a third control valve to open and close; two gas inlet ends of the gas outlet pipeline are respectively communicated with the tops of the two adsorption towers; the regeneration pipeline is controlled by the fourth control valve to be opened and closed and connected with the air outlet pipeline and the outer ends of the four first control valves. The adsorbent with high water absorption capacity on the lower side of the adsorption tower can be dried, dehydrated and regenerated directionally, and the regeneration effect of the adsorbent on the lower half part of the adsorption tower is improved.

Description

Technical Field

[0001] This utility model relates to the field of desiccant dryers, specifically a recyclable desiccant dryer. Background Technology

[0002] A desiccant dryer, short for adsorption dryer, works by using a molecular sieve specifically designed for gas purification to filter out saturated water vapor from compressed air, taking advantage of the volume difference between water and air molecules. The sieve easily adsorbs water molecules, and then regenerates the saturated water vapor. Specifically, a regenerating desiccant dryer typically consists of two adsorption towers, A and B. In the A-tower adsorption-B-tower regeneration mode, a portion of the dry gas adsorbed and output from tower A becomes the regeneration gas input into tower B, while the majority is output as the finished product gas. This regeneration gas is then input into tower B to regenerate the molecular sieve. After a period of time, the system switches to a B-tower adsorption-A-tower regeneration mode, continuously cycling between the two modes to ensure a continuous output of finished product gas.

[0003] However, in existing circulating regeneration desiccant dryers, the adsorption tower typically has bottom inlet and top outlet during adsorption. This results in the adsorbent at the bottom absorbing more water than the adsorbent at the top. During regeneration, the regeneration gas typically has top inlet and bottom outlet. Although the regeneration gas eventually passes through the adsorption tower to the bottom, the heat and drying energy carried by the regeneration gas are wasted due to the excessively long airflow path, leading to poor regeneration effect of the adsorption tower. This, in turn, results in poor subsequent adsorption effect, affecting the production capacity and quality of the finished gas.

[0004] The research objective of this utility model is to design a recyclable desiccant dryer to address the problems existing in the prior art. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention provides a recyclable desiccant dryer, which can effectively solve the problems existing in the prior art.

[0006] The technical solution of this utility model is:

[0007] A regenerative desiccant dryer, comprising:

[0008] Two adsorption towers are provided with regeneration devices and filled with adsorbents. The upper and lower sides of the two adsorption towers are sealed with first control valves. Each regeneration device includes a gas guide pipe that is spirally wound from top to bottom and sealed at both ends to the inner end of the first control valve on the upper and lower sides. The gas guide pipe is in the shape of a tower with a smaller upper part and a larger lower part, and several gas outlet holes are provided through the side wall.

[0009] The air inlet pipe has two outlets that are respectively connected to the bottom of the two adsorption towers and are respectively controlled to open and close by the second control valve.

[0010] The exhaust pipe has two inlet ends that are respectively connected to the bottom of the two adsorption towers and are controlled to open and close by a third control valve.

[0011] The exhaust pipe has two inlet ends connected to the tops of the two adsorption towers, respectively.

[0012] The regeneration pipeline is controlled by the fourth control valve to open and close, and is respectively connected to the outlet pipeline and the outer ends of the four first control valves.

[0013] Furthermore, it also includes a heating device whose air inlet is connected to the air outlet of the regeneration pipeline, and the air outlet of the heating device is respectively connected to the four first control valves.

[0014] Furthermore, the upper and lower ends of the air guide tube extend laterally to form connecting parts for connecting the corresponding first control valves. The two connecting parts are flexibly connected to the inner ends of the first control valves on the upper and lower sides, respectively. The regeneration device also includes a vibration mechanism for driving the air guide tube to vibrate.

[0015] Furthermore, the lower connecting portion is provided with several vibration mechanisms with identical structures. Each vibration mechanism includes a rotating shaft passing through the air guide tube, a cam rotatably sleeved on the rotating shaft, and a guide portion protruding from the upper inner wall of the lower connecting portion and located between the cam and the first control valve. The bottom surface of the guide portion is inclined and gradually decreases in height away from the first control valve on the lower side. A guide zone with gradually decreasing width towards the direction away from the first control valve is formed between the guide portion and the lower inner wall of the lower connecting portion. The cam is directly opposite the narrow end of the guide zone. The regeneration gas introduced into the lower connecting portion by the first control valve on the lower side flows through the guide zone, impacts the cam to rotate, and drives the air guide tube to vibrate.

[0016] Furthermore, the two connecting parts are respectively connected to the inner ends of the first control valve on the upper and lower sides through corrugated pipes. The regeneration device also includes a buffer support frame that is detachably installed in the adsorption tower, and the gas guide pipe is fixedly wound around the buffer support frame.

[0017] Furthermore, the buffer support frame includes annular frames distributed vertically and several support rods arranged in a conical shape. The upper and lower ends of the several support rods are respectively hinged to hinge seats on opposite sides of the two annular frames through hinge parts (921). A flexible sleeve for flexible vibration reduction is sleeved inside the hinge hole of the hinge seat. The outer walls of the two annular frames are respectively flexibly sleeved to the inner walls of the upper and lower ends of the adsorption tower through flexible layers. The gas guide pipe is spirally fixed around the outside of the several support rods.

[0018] Therefore, the beneficial effects of this utility model are:

[0019] 1. By adding a regeneration device inside the adsorption tower, when one adsorption tower adsorbs and the other adsorption tower regenerates, a portion of the finished gas output from one adsorption tower can be diverted through the regeneration pipeline to the first control valves on the upper and lower sides of the other adsorption tower to form regeneration gas. In the initial stage of regeneration, the exhaust valve of the other adsorption tower is closed, and the first control valve on the lower side is opened, allowing the regeneration gas to enter the lower end of the gas guide pipe, spiraling upwards and exiting through several outlet holes on its side wall. The tower-shaped gas guide pipe, with a smaller upper section and a larger lower section, ensures that the outlet area in the lower half of the pipe is larger than that in the upper half, thus concentrating more regeneration gas in the lower half of the adsorption tower. This allows for targeted drying of the adsorbent with higher water absorption in the lower part of the adsorption tower. Drying and dehydration regeneration improves the regeneration effect of the adsorbent in the lower half of the adsorption tower. After a certain period of time, the exhaust valve of the other adsorption tower is opened, the first control valve on the lower side is closed, and the first control valve on the upper side is opened. The regeneration gas is introduced into the upper end of the gas guide pipe and spirals down from top to bottom, and is discharged from several gas outlets on its side wall. This allows for drying and dehydration regeneration of all the adsorbent in the adsorption tower from top to bottom. The regeneration gas input at the beginning of regeneration is driven downward and discharged to the exhaust pipe. Finally, the regeneration gas is discharged from the regeneration pipe after the adsorbent regeneration is completed. This can promote the rapid discharge of the fully water-absorbed regeneration gas input at the beginning of regeneration from the bottom, thereby improving the overall regeneration effect of the adsorbent in the adsorption tower.

[0020] 2. By heating the finished gas input into the regeneration pipeline through a heating device to form a regenerated gas with heat, and then passing the regenerated gas with heat into the adsorption tower that needs to be regenerated, the regeneration effect and efficiency of the regenerated gas on the adsorbent can be significantly improved, the volume of regenerated gas required for adsorbent regeneration can be saved, and the total output of finished gas can be increased.

[0021] 3. The vibration mechanism allows the regeneration gas introduced into the lower connecting section through the first control valve at the bottom to vibrate the gas guide tube during the initial regeneration phase. This vibration drives the cam to rotate and vibrate the gas guide tube, eliminating the need for external intervention. The gas guide tube vibrates slightly through the flow of regeneration gas. As the regeneration gas exits through several outlets into the adsorption tower to dry and regenerate the adsorbent, the slight vibration of the gas guide tube loosens the adsorbent that has clumped due to water absorption, increasing the contact area and removal efficiency between the regeneration gas and the adsorbent. This further improves the regeneration efficiency of the gas guide tube on the adsorbent in the lower half of the adsorption tower during the initial regeneration phase. Furthermore, the vibration of the gas guide tube caused by the cam rotation driven by the flow of regeneration gas is a low-frequency, slight vibration, which avoids excessive vibration that could break the adsorbent particles and improves the stability of the gas guide tube vibration.

[0022] 4. By adding a bellows, a flexible connection is achieved between the connecting part and the inner end of the first control valve. Thus, when the air guide pipe vibrates, the bellows can act as a buffer and vibration damper between the connecting part and the inner end of the first control valve, preventing the connection between the air guide pipe and the first control valve from breaking and leaking due to vibration, thereby improving the connection stability of the air guide pipe. Furthermore, by adding a buffer support frame, the entire air guide pipe can be stably supported, improving the overall structural stability of the air guide pipe.

[0023] 5. By flexibly hinged at both ends of several support rods to two annular frames, vibration damping and buffering between the support frame and the annular frame can be achieved through the flexible hinges when the gas guide pipe vibrates. In addition, the flexible layer on the outer wall of the annular frame is flexibly sleeved onto the inner wall of the adsorption tower. When the gas guide pipe vibrates, the flexible layer can achieve vibration damping and buffering between the annular frame and the adsorption tower, thereby improving the overall structural stability of the buffer support frame, thereby improving the stability of the gas guide pipe during vibration. It can also reduce the probability of noise generated by the vibration of the gas guide pipe being transmitted to the outside through the support rods, annular frame, and side wall of the adsorption tower, thus improving the overall stability of the adsorption tower during regeneration. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the front structure of a regenerating desiccant dryer.

[0025] Figure 2 This is a schematic diagram of the rear structure of a regenerating absorbent dryer.

[0026] Figure 3 This is a cross-sectional structural diagram of a regenerative desiccant dryer.

[0027] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0028] Figure 5 This is a schematic diagram of the air delivery tube.

[0029] Figure 6 This is a cross-sectional view of the air duct.

[0030] Figure 7 for Figure 6 Enlarged schematic diagram of the lower middle connecting part.

[0031] Figure 8 This is a schematic diagram of the exploded structure of two ring-shaped frames.

[0032] Figure 9 This is a schematic diagram of a bellows structure. Detailed Implementation

[0033] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0034] refer to Figure 1-9 A regenerating desiccant dryer, comprising:

[0035] Two adsorption towers 1 are provided with regeneration devices and filled with adsorbent (not shown in the figure). The upper and lower sides of the two adsorption towers 1 are sealed with first control valves 11. Each regeneration device includes a gas guide pipe 2 that is spirally wound from top to bottom and sealed at both ends to the inner end of the first control valve 11 on the upper and lower sides. The gas guide pipe 2 is generally tower-shaped with a smaller upper part and a larger lower part, and the side wall is provided with several gas outlet holes 21. Specifically, the adsorbent is a carbon molecular sieve.

[0036] The air inlet pipe 3 has two outlets that are respectively connected to the bottom of the two adsorption towers 1 and are respectively controlled to open and close by the second control valve 31.

[0037] The exhaust pipe 4 has two air inlets that are respectively connected to the bottom of the two adsorption towers 1 and are controlled to open and close by the third control valve 41.

[0038] The exhaust pipe 5 has two inlet ends that are respectively connected to the top of the two adsorption towers 1;

[0039] The regeneration pipeline 6 is controlled by the fourth control valve 61 to open and close, and is respectively connected to the outlet pipeline 5 and the external ends of the four first control valves 11. Specifically, the control valves described in this application can all be existing manual valves or automatic valves.

[0040] The above-described structure, by adding a regeneration device inside the adsorption tower 1, allows for the regeneration of the product gas output from one adsorption tower 1 while the other adsorption tower 1 is being regenerated. A portion of this gas is diverted through the regeneration pipeline 6 to the first control valve 11 on the upper and lower sides of the other adsorption tower 1 to form regeneration gas. Initially, the exhaust valve of the other adsorption tower 1 is closed, and the lower first control valve 11 is opened, allowing the regeneration gas to flow into the lower end of the gas guide pipe 2, spiraling upwards and exiting through several outlet holes 21 on its side wall. The tower-shaped gas guide pipe 2, with its smaller upper section and larger lower section, ensures that the lower half of the gas guide pipe 2 has a larger outlet area than the upper half, concentrating the regeneration gas in the lower half of the adsorption tower 1. This allows for targeted regeneration of the lower part of the adsorption tower 1 where water absorption is higher. The adsorbent undergoes drying and dehydration regeneration to improve the regeneration effect on the lower half of the adsorbent in the adsorption tower 1. After a certain period of time, the exhaust valve of the other side of the adsorption tower 1 is opened, the first control valve 11 on the lower side is closed, and the first control valve 11 on the upper side is opened. The regeneration gas is introduced into the upper end of the gas guide pipe 2 and spirals down from top to bottom, and is discharged from several gas outlets 21 on its side wall. This allows for drying and dehydration regeneration of all the adsorbent in the adsorption tower 1 from top to bottom. The regeneration gas input at the beginning of the regeneration is driven downward and discharged to the exhaust pipe 4. Finally, the regeneration gas is discharged from the regeneration pipe 6 after the adsorbent regeneration is completed. This can promote the rapid discharge of the fully water-absorbed regeneration gas input at the beginning of the regeneration from the bottom, thereby improving the overall regeneration effect of the adsorbent in the adsorption tower 1.

[0041] To improve the regeneration efficiency of the regenerated gas, a heating device 7 is included, with its inlet end connected to the outlet end of the regeneration pipeline 6. The outlet end of the heating device 7 is connected to four of the first control valves 11. Thus, the finished gas input into the regeneration pipeline 6 can be heated by the heating device 7 to form regenerated gas with added heat. This heated regenerated gas is then introduced into the adsorption tower 1 that needs regeneration, significantly improving the regeneration effect and efficiency of the adsorbent, saving the volume of regenerated gas required for adsorbent regeneration, and thereby increasing the total output of the finished gas.

[0042] To further improve the regeneration efficiency of the regeneration gas for the adsorbent in the lower half of the adsorption tower 1 during the initial regeneration stage, the upper and lower ends of the gas guide pipe 2 are extended laterally to form connecting parts 22 that connect to the corresponding first control valves 11. The two connecting parts 22 are flexibly connected to the inner ends of the first control valves 11 on the upper and lower sides, respectively. The regeneration device also includes a vibration mechanism 8 for driving the gas guide pipe 2 to vibrate.

[0043] Specifically, the lower connecting portion 22 is provided with several vibration mechanisms 8 with identical structures. Each vibration mechanism 8 includes a rotating shaft 81 that passes through the air guide pipe 2, a cam 82 rotatably sleeved on the rotating shaft 81, and a guide portion 83 protruding from the upper inner wall of the lower connecting portion 22 and located between the cam 82 and the first control valve 11. The bottom surface of the guide portion 83 is inclined and gradually decreases in height away from the first control valve 11. A guide area 84 with gradually decreasing width towards the direction away from the first control valve 11 is formed between the guide portion 83 and the lower inner wall of the lower connecting portion 22. The cam 82 is directly opposite the narrow end of the guide area 84. The above structure allows the first control valve 11 on the lower side to supply air to the lower air guide pipe 2 during the initial stage of regeneration. The regenerated gas from the connecting section 22 is guided by the flow guide zone 84, impacting the cam 82 to rotate and causing the gas guide pipe 2 to vibrate. This allows the gas guide pipe 2 to vibrate slightly without the need for external intervention, simply by the flow of the regenerated gas. As the regenerated gas is discharged into the adsorption tower 1 through several outlet holes 21 to dry and regenerate the adsorbent, the slight vibration of the gas guide pipe 2 loosens the adsorbent that has clumped due to water absorption, increasing the contact area and removal efficiency between the regenerated gas and the adsorbent. This further improves the regeneration efficiency of the regenerated gas on the adsorbent in the lower half of the adsorption tower 1 during the initial regeneration stage. Furthermore, the vibration of the gas guide pipe 2 caused by the flow of the regenerated gas driving the cam 82 to rotate is only a small-frequency, slight vibration, which can prevent the gas guide pipe 2 from vibrating excessively and breaking the adsorbent particles, thus improving the stability of the vibration of the gas guide pipe 2.

[0044] To improve the structural stability of the gas guide pipe 2, the two connecting parts 22 are respectively connected to the inner ends of the first control valve 11 on the upper and lower sides through corrugated pipes 23. The corrugated pipe 23 mainly includes a metal corrugated pipe 23, a corrugated expansion joint, a corrugated heat exchange tube, a diaphragm box, and a metal flexible tube. The metal corrugated pipe 23 is mainly used to compensate for pipeline thermal deformation, damping, and absorbing pipeline settlement deformation. Specifically, in this embodiment, the corrugated pipe 23 can be a stainless steel corrugated pipe 23. The regeneration device also includes a buffer support frame 9 detachably installed in the adsorption tower 1, and the gas guide pipe 2 is fixedly wound around the buffer support frame 9. The above structure, through the addition of the bellows 23, achieves a flexible connection between the connecting part 22 and the inner end of the first control valve 11. Thus, when the air guide pipe 2 vibrates, the bellows 23 can play a buffering and vibration-damping role between the connecting part 22 and the inner end of the first control valve 11, preventing the connection between the air guide pipe 2 and the first control valve 11 from being broken and leaking due to vibration, thereby improving the connection stability of the air guide pipe 2. Furthermore, through the addition of the buffer support frame 9, the air guide pipe 2 can be stably supported as a whole, improving the overall structural stability of the air guide pipe 2.

[0045] To improve the structural stability of the buffer support frame 9, the buffer support frame 9 includes annular frames 91 distributed vertically and several support rods 92 arranged in a conical shape. The upper and lower ends of the several support rods 92 are respectively hinged to hinge seats 912 on opposite sides of the two annular frames 91 through hinge parts 921. A flexible sleeve 913 for flexible vibration reduction is sleeved inside the hinge hole of the hinge seat 912. The outer walls of the two annular frames 91 are respectively connected to the inner walls of the upper and lower ends of the adsorption tower 1 through flexible layers 911 and flexible sleeves 913. The gas guide pipe 2 is spirally fixed around the outside of the several support rods 92. Specifically, the flexible sleeve 913 can be made of flexible materials such as rubber to achieve flexible hinge and play a role in vibration reduction and buffering. The above structure flexibly hinges several support rods 92 to the two annular frames 91 at their upper and lower ends respectively. When the gas pipe 2 vibrates, the flexible hinges can achieve vibration reduction and buffering between the support frame and the annular frame 91. Furthermore, the flexible layer 911 on the outer wall of the annular frame 91 is connected to the inner wall of the adsorption tower 1 through the flexible sleeve 913. When the gas pipe 2 vibrates, the flexible layer 911 can achieve vibration reduction and buffering between the annular frame 91 and the adsorption tower 1, thereby improving the overall structural stability of the buffer support frame 9, and thus improving the stability of the gas pipe 2 when it vibrates. It can also reduce the probability of the noise generated by the vibration of the gas pipe 2 being transmitted to the outside through the support rods 92, the annular frame 91, and the side wall of the adsorption tower 1, thereby improving the overall stability of the adsorption tower 1 during regeneration.

[0046] Specifically, the air outlet 21 is a micropore smaller than the adsorbent particles. If necessary, a filter screen for filtering the adsorbent can be sealed inside several of the air outlets 21 to prevent the adsorbent from entering the air guide tube 2 and clogging the air guide tube 2.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A recyclable desiccant dryer, characterized in that, include: Two adsorption towers (1) are provided with regeneration devices and filled with adsorbents. The upper and lower sides of the two adsorption towers (1) are sealed and penetrated by a first control valve (11). Each regeneration device includes a gas guide pipe (2) spirally wound from top to bottom and sealed at both ends to the inner end of the first control valve (11) on the upper and lower sides. The gas guide pipe (2) is in the shape of a tower with a smaller upper part and a larger lower part, and several gas outlet holes (21) are provided through the side wall. The air inlet pipe (3) has two outlets that are connected to the bottom of the two adsorption towers (1) respectively and are controlled to open and close by the second control valve (31); The exhaust pipe (4) has two inlet ends connected to the bottom of the two adsorption towers (1) respectively and controlled to open and close by the third control valve (41); The outlet pipe (5) has two inlet ends connected to the top of the two adsorption towers (1) respectively; The regeneration pipeline (6) is controlled to open and close by the fourth control valve (61) and is connected to the outlet pipeline (5) and the outer ends of the four first control valves (11) respectively.

2. A cyclic regenerative drying machine as claimed in claim 1, wherein It also includes a heating device (7) whose air inlet is connected to the air outlet of the regeneration pipeline (6), and the air outlet of the heating device (7) is connected to four of the first control valves (11).

3. A cyclic regenerative drying machine as claimed in claim 1, wherein, The upper and lower ends of the air guide tube (2) extend laterally to form connecting parts (22) that connect to the corresponding first control valve (11). The two connecting parts (22) are flexibly connected to the inner ends of the first control valve (11) on the upper and lower sides respectively. The regeneration device also includes a vibration mechanism (8) for driving the air guide tube (2) to vibrate.

4. A cyclic regenerative drying machine as claimed in claim 3, wherein The lower connecting part (22) is provided with several vibration mechanisms (8) with the same structure. Each vibration mechanism (8) includes a rotating shaft (81) that passes through the air guide pipe (2), a cam (82) that is rotatably sleeved on the rotating shaft (81), and a guide part (83) that protrudes from the upper inner wall of the lower connecting part (22) and is located between the cam (82) and the first control valve (11). The bottom surface of the guide part (83) is inclined and faces away from the lower first control valve. The height of the control valve (11) gradually decreases, and a guide zone (84) is formed between the guide section (83) and the lower inner wall of the connecting section (22) on the lower side, with the width gradually decreasing in the direction away from the first control valve (11). The cam (82) is directly opposite the narrow end of the guide zone (84). The regeneration gas from the first control valve (11) on the lower side into the connecting section (22) on the lower side is guided by the guide zone (84) and impacts the cam (82) to rotate, causing the gas pipe (2) to vibrate.

5. A cyclic regenerative drying machine as claimed in claim 4, wherein The two connecting parts (22) are respectively connected to the inner ends of the first control valve (11) on the upper and lower sides through the corrugated pipe (23). The regeneration device also includes a buffer support frame (9) that is detachably installed in the adsorption tower (1). The gas guide pipe (2) is fixedly wound around the buffer support frame (9).

6. A cyclic regenerative drying machine as claimed in claim 5, wherein The buffer support frame (9) includes annular frames (91) distributed vertically and annular frames (91) and a number of support rods (92) arranged in a conical shape. The upper and lower ends of the support rods (92) are respectively hinged to the hinge seats (912) on opposite sides of the two annular frames (91) through hinge parts (921). A flexible sleeve (913) for flexible vibration reduction is sleeved in the hinge hole of the hinge seat (912). The outer walls of the two annular frames (91) are respectively connected to the inner walls of the upper and lower ends of the adsorption tower (1) through flexible layers (911) and flexible sleeves (913). The gas guide pipe (2) is spirally fixed and wound around the outside of the support rods (92).

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