Multi-tower surrounding drying device

Abstract

The invention relates to the technical field of air drying, and discloses a multi-tower surround drying device, comprising a driving outer cylinder and a driving inner cylinder, wherein a precooling cylinder is coaxially arranged inside the driving inner cylinder, two or more drying towers are arranged between the driving outer cylinder and the driving inner cylinder, the top of the precooling cylinder is rotatably connected to a rotary air valve, the rotary air valve is communicated with the two or more drying towers, and when the driving outer cylinder and the driving inner cylinder are rotated, the precooling cylinder and the drying tower are driven to rotate; a spiral-shaped air guide plate is arranged inside the drying tower; the invention realizes continuous drying through seamless switching of the rotary air valve, eliminates the efficiency loss during traditional double-tower switching, and at the same time, the rotary precooling plate can make the gas flow in a spiral, prolongs the heat exchange time, and the gas is further compressed during rotation, thereby reducing the subsequent drying energy consumption and improving the drying efficiency; and an external heat exchanger and a regeneration fan are eliminated, and the volume of the equipment is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of air drying, in particular to a multi-tower surrounding drying device. Background Art

[0002] The hot air blower dryer is an air drying device that uses a blower to introduce ambient air and raise its temperature through a heating system, and then introduces this hot air into a drying tower filled with adsorbent. In the drying tower, the high-temperature air causes the adsorbent to release the previously captured moisture, achieving adsorbent regeneration. At the same time, the other drying tower is in an adsorption state and continuously outputs dry air. This equipment has been widely used in many industries such as electronics, pharmaceuticals, food processing, and chemicals for its high efficiency and energy saving, simple operation, low maintenance cost, and ability to continuously provide low dew point dry air.

[0003] However, existing air dryers usually use dual towers, namely regeneration towers and adsorption towers. When using the dual tower alternating adsorption / regeneration mode, the switching process requires a short shutdown or reduction in processing capacity, resulting in fluctuations in production line efficiency. In addition, the dual tower dryer relies on an external heat exchanger for pre-cooling, with low heat exchange efficiency (the gas needs to be pre-cooled to below 15°C), and significant energy loss. At the same time, the independently configured regeneration fan and heat exchanger make the equipment bulky and difficult to deploy in chemical plants or small workshops with limited space. The regeneration process relies on external heating and long-term purge, and the temperature distribution is uneven (temperature fluctuations reach ±15°C), resulting in incomplete adsorbent regeneration and high moisture residue rate. When the compressed gas circulates in the drying tower, the unidirectional flow path of the gas is fixed, which easily forms a "dead zone" in the drying tower, making the adsorbent partially unutilized (the utilization rate is less than 70%), thereby increasing the cost of adsorbent replacement and maintenance. Summary of the invention

[0004] (I) Technical problems to be solved: In view of the shortcomings of the prior art, the present invention provides a multi-tower surround drying device, which has the advantages of efficient use of adsorbents, low energy consumption and small regeneration temperature fluctuations, and solves the problems of high pre-cooling energy consumption and large regeneration temperature fluctuations, insufficient adsorbent utilization and frequent maintenance.

[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of efficient utilization of adsorbent with low energy consumption and small regeneration temperature fluctuation, the present invention provides the following technical solution: a multi-tower surround drying device, comprising a driving outer cylinder and a driving inner cylinder, a precooling cylinder is coaxially arranged in the driving inner cylinder, two or more drying towers are arranged between the driving outer cylinder and the driving inner cylinder, the top of the precooling cylinder is rotatably connected to a rotary air valve, and the rotary air valve is connected to the two or more drying towers. When the driving outer cylinder and the driving inner cylinder rotate, the precooling cylinder and the drying tower are driven to rotate; a spiral-shaped air guide plate is arranged inside the drying tower, and an adsorbent is arranged on the air guide plate. The air guide plate comprises an inner plate and an outer plate, a microchannel condenser is arranged inside the inner plate, and an electric auxiliary heating structure is arranged inside the outer plate. When the drying tower rotates, the gas flows in a spiral direction along the air guide plate, the microchannel condenser is started during adsorption, and the electric auxiliary heating structure is started during regeneration.

[0006] Preferably, a variable-direction axial fan is coaxially arranged between the inner plate and the outer plate, and a driving module for controlling the angle of the axial fan is arranged at the top and bottom of the drying tower. When the drying tower rotates, the driving module generates different wind directions by changing the inclination angle of the axial fan.

[0007] Preferably, the axial flow fan includes a fixed inner ring, a rotating outer ring, and sliding blades. The diameter of the fixed inner ring is smaller than the diameter of the rotating outer ring. The fixed inner ring is coaxially fixedly mounted on the inner plate, and the rotating outer ring is coaxially rotatably mounted on the outer plate. The top and bottom of the rotating outer ring are rotatably connected to the drying tower. A plurality of groups of sliding blades are arranged between the rotating outer ring and the fixed inner ring. One end of the sliding blade is hinged to the fixed inner ring, and the other end of the sliding blade is hinged to the rotating outer ring. The sliding blade can slide and retract. The top and bottom of the rotating outer ring are meshed with the driving end of the driving module. When the driving module drives the rotating outer ring to rotate, the rotating outer ring drives the sliding blade to change the inclination angle of the sliding blade.

[0008] Preferably, when the driving module rotates back and forth periodically, the rotating outer ring drives the sliding blades to rotate back and forth periodically, so that a reciprocating periodic gas flow is generated in the drying tower and between the outer plate and the inner plate.

[0009] Preferably, the sliding fan blade comprises a sliding sheet and a fixed sheet, the sliding sheet and the fixed sheet are slidably connected to each other, and an elastic structure is connected between the sliding sheet and the fixed sheet.

[0010] Preferably, the inner and outer walls of the driving inner cylinder are respectively meshed with the precooling cylinder and the drying tower for transmission, and the inner wall of the driving outer cylinder is meshed with the drying tower for transmission.

[0011] Preferably, ventilation holes are provided on the wall surfaces of the fixed inner ring and the rotating outer ring.

[0012] Preferably, a fixed shaft is coaxially fixedly installed on the air guide plate, and the microchannel condenser is communicated with the fixed shaft and is connected to a cooler.

[0013] Preferably, a precooling plate is coaxially fixedly connected inside the precooling cylinder, the precooling plate is spiral in shape, and the rotary air valve is rotationally connected to the drying tower.

[0014] (III) Beneficial effects: Compared with the prior art, the present invention provides a multi-tower surround drying device, which has the following beneficial effects: 1. The multi-tower surround drying device, through the coordinated use of the pre-cooling cylinder structure and the drying tower structure, multiple groups of drying towers alternately adsorb and regenerate, and seamlessly switch through the rotating gas valve to achieve continuous drying, eliminating the efficiency loss during the traditional double-tower switching. At the same time, the rotating pre-cooling plate can make the gas flow in a spiral, extending the heat exchange time. The gas is further compressed during rotation, reducing the subsequent drying energy consumption and improving the drying efficiency. In addition, the external heat exchanger and regeneration fan are eliminated, and the pre-cooling, compression, and drying functions are integrated into the pre-cooling plate structure. The equipment volume is reduced by 30%-50%, which is more suitable for compact spaces.

[0015] 2. The multi-tower surround drying device uses a drying tower structure in conjunction with an air guide plate structure. During adsorption operation, the gas flow path in the drying tower is extended, thereby greatly increasing the contact time between the adsorbent and the gas, and the drying efficiency is increased by more than 30%. In addition, since the microchannel condenser is directly embedded in the inner plate of the air guide plate, the temperature fluctuation of the adsorbent is small, which not only improves the cooling efficiency and the moisture capture capacity of the adsorbent, but also reduces energy loss. In the regeneration stage, since the electric auxiliary heat is embedded in the outer plate of the air guide plate, the adsorbent can be heated quickly and the heat is evenly transferred along the spiral airflow, which greatly reduces the standard deviation of the regeneration temperature and energy consumption. In addition, the heat released by the regeneration of the first tower is used for preheating the second tower, thereby improving energy utilization.

[0016] 3. The multi-tower surround drying device uses an air guide plate structure in conjunction with an axial flow fan structure. While the drying tower continues to rotate, the wind direction of the axial flow fan is changed to force the gas to flow back and forth between the inner plate and the outer plate, disrupting the single spiral path of the gas and increasing turbulence, thereby increasing the frequency of contact between the gas and the adsorbent and making the gas distribution more uniform.

[0017] 4. The multi-tower surround drying device uses a drying tower structure in conjunction with an air guide plate structure. When the drying tower rotates, the moisture adsorbed inside the adsorbent is squeezed outward under the action of centrifugal force, detaches from the microporous structure of the adsorbent, and gathers on the surface of the adsorbent. The gas can absorb moisture more efficiently, reducing the heat energy and airflow consumption required for regeneration, and avoiding the problem of slow desorption caused by moisture retention in traditional regeneration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the multi-tower surrounding drying device in the present invention.

[0019] Figure 2 It is a top view of the structure of the multi-tower surrounding drying device in the present invention.

[0020] Figure 3 It is a structural front view of the multi-tower surrounding drying device in the present invention.

[0021] Figure 4 for Figure 2 AA section view.

[0022] Figure 5 This is a schematic diagram of the adsorbent installation position of the multi-tower surround drying device in the present invention.

[0023] Figure 6 for Figure 3 Middle BB section view.

[0024] Figure 7 for Figure 4 Enlarged view of the local structure at position N.

[0025] Figure 8 for Figure 6 Enlarged view of the local structure at M in the middle.

[0026] Fig. 9 It is a three-dimensional schematic diagram of the sliding fan blade structure of the multi-tower surrounding drying device in the present invention.

[0027] Fig.10 It is a cross-sectional view of the sliding fan blade structure of the multi-tower surrounding drying device in the present invention.

[0028] Fig.11 It is a schematic diagram of adjusting the inclination angle of the sliding fan blade structure of the multi-tower surround drying device in the present invention.

[0029] Fig.12 It is a schematic diagram of the axial flow fan structure of the multi-tower surround drying device in the present invention exhausting air outward.

[0030] Fig.13 It is a schematic diagram of the inward exhaust of the axial flow fan structure of the multi-tower surround drying device in the present invention.

[0031] In the figure: 1. driving outer cylinder; 2. driving inner cylinder; 3. pre-cooling cylinder; 31. pre-cooling plate; 4. rotary air valve; 5. drying tower; 51. air guide plate; 511. inner plate; 512. outer plate; 52. axial flow fan; 521. fixed inner ring; 522. rotating outer ring; 523. sliding blades; 524. sliding sheets; 525. fixed sheets; 526. elastic structure; 53. fixed shaft; 6. microchannel condenser; 7. electric auxiliary heating structure; 8. driving module; 9. adsorbent. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-5The multi-tower surrounding drying device comprises a driving outer cylinder 1 and a driving inner cylinder 2. A precooling cylinder 3 is coaxially arranged in the driving inner cylinder 2. The setting of the precooling cylinder 3 can precool the gas before it enters the drying tower 5, prolong the heat exchange time, and the gas is further compressed during rotation, thereby reducing the subsequent drying energy consumption and improving the drying efficiency. Two or more drying towers 5 are arranged between the driving outer cylinder 1 and the driving inner cylinder 2. Through this design, multiple groups of drying towers 5 can be alternately adsorbed and regenerated, and the rotary air valve 4 is used for seamless switching, thereby achieving continuous drying and eliminating the efficiency loss during the traditional double-tower switching. The top of the precooling cylinder 3 is rotatably connected to the rotary air valve 4, and the rotary air valve 4 is connected to the two or more drying towers 5. The rotary air valve 4 can flexibly distribute the precooled gas to different drying towers 5, realizing seamless switching between multiple towers and ensuring the continuity of the drying process. This design enables the gas to flow to different drying towers 5 for adsorption drying as needed, thereby improving the flexibility and drying efficiency of the equipment. When the outer cylinder 1 and the inner cylinder 2 are driven to rotate, the precooling cylinder 3 and the drying tower 5 are driven to rotate; a spiral-shaped air guide plate 51 is arranged inside the drying tower 5, and an adsorbent 9 is arranged on the air guide plate 51. The spiral-shaped air guide plate 51 can extend the flow path of the gas in the drying tower 5, thereby increasing the contact time between the gas and the adsorbent 9 and improving the adsorption efficiency. The air guide plate 51 includes an inner plate 511 and an outer plate 512. A microchannel condenser 6 is arranged inside the inner plate 511. The microchannel condenser 6 is embedded in the inner plate 511, which can quickly cool the adsorbent 9 during the adsorption process, reduce the temperature fluctuation of the adsorbent 9, and improve the cooling efficiency and the moisture capture capacity of the adsorbent 9. There is an electric auxiliary heating structure 7 inside the outer plate 512, and the electric auxiliary heating structure 7 is embedded in the outer plate 512, which can quickly heat the adsorbent 9 during the regeneration process, so that the heat is evenly transferred along the spiral airflow, reducing the standard deviation of the regeneration temperature and energy consumption, and improving the energy utilization rate. At the same time, the heat released by the regeneration of the first tower can be used for preheating the second tower, further improving the energy utilization efficiency. When the drying tower 5 rotates, the gas is caused to flow in a spiral direction along the air guide plate 51, the microchannel condenser 6 is started during adsorption, and the electric auxiliary heating structure 7 is started during regeneration.

[0034] See also Figure 4-8A variable-direction axial flow fan 52 is coaxially arranged between the inner plate 511 and the outer plate 512. By changing the wind direction of the axial flow fan 52, the gas is forced to flow back and forth between the inner plate 511 and the outer plate 512. This design can disrupt the single spiral path of the gas and increase turbulence, thereby increasing the frequency of contact between the gas and the adsorbent 9 and making the gas distribution more uniform. A drive module 8 for controlling the angle of the axial flow fan 52 is arranged at the top and bottom of the drying tower 5. The drive module 8 can control the inclination angle of the axial flow fan 52 to adjust the wind direction. When the drying tower 5 rotates, the drive module 8 generates different wind directions by changing the inclination angle of the axial flow fan 52. This reciprocating change of wind direction can make the compressed gas flow back and forth between the inner plate 511 and the outer plate 512, increasing the contact time between the gas and the adsorbent 9 and significantly improving the adsorption efficiency. The axial flow fan 52 includes a fixed inner ring 521, a rotating outer ring 522, and sliding blades 523. The diameter of the fixed inner ring 521 is smaller than that of the rotating outer ring 522. The fixed inner ring 521 is coaxially fixedly mounted on the inner plate 511, and the rotating outer ring 522 is coaxially rotatably mounted on the outer plate 512. The top and bottom of the rotating outer ring 522 are rotatably connected to the drying tower 5. This design of the fixed inner ring 521 and the rotating outer ring 522 can ensure the stable installation and rotation of the axial flow fan 52. Several groups of sliding blades 523 are arranged between the rotating outer ring 522 and the fixed inner ring 521. By arranging several groups of sliding blades 523, it can be ensured that the axial flow fan 52 can generate sufficient airflow when rotating and change the flow direction of the gas. One end of the sliding blade 523 is hinged to the fixed inner ring 521, and the other end of the sliding blade 523 is hinged to the rotating outer ring 522. The sliding blade 523 can slide and retract. The top and bottom of the rotating outer ring 522 are meshed with the driving end of the driving module 8. This design allows the sliding blade 523 to change its tilt angle when the rotating outer ring 522 rotates, thereby adjusting the wind direction. When the driving module 8 drives the rotating outer ring 522 to rotate, the rotating outer ring 522 drives the sliding blade 523 to change the blade tilt angle. When the driving module 8 reciprocates periodically, the rotating outer ring 522 drives the sliding blade 523 to reciprocate periodically, so that a reciprocating periodic gas flow is generated between the outer plate 512 and the inner plate 511 in the drying tower 5.

[0035] See also Figure 9-10 The sliding blade 523 includes a sliding piece 524 and a fixing piece 525, the sliding piece 524 and the fixing piece 525 are slidably connected, and an elastic structure 526 is connected between the sliding piece 524 and the fixing piece 525. The elastic structure 526 adopts common elastic elements such as springs and elastic sheets. This design allows the sliding blade 523 to have a certain degree of elasticity during the rotation process, thereby avoiding the problem of its own length change caused by the change of angle, and ensuring the stability and reliability of the axial flow fan 52.

[0036] See also Figure 1-5, the inner and outer walls of the driving inner cylinder 2 are respectively gear-engaged with the precooling cylinder 3 and the drying tower 5, and the inner wall of the driving outer cylinder 1 is gear-engaged with the drying tower 5. This design can ensure the synchronous rotation between the driving outer cylinder 1, the driving inner cylinder 2, the precooling cylinder 3 and the drying tower 5, and improve the stability and transmission efficiency of the entire device. At the same time, the gear-engaging transmission also has high transmission accuracy and carrying capacity, which is suitable for such occasions that require precise control and bear large loads. Ventilation holes are provided on the wall surfaces of the fixed inner ring 521 and the rotating outer ring 522. The setting of the ventilation holes can make the gas flow better between the inner plate 511 and the outer plate 512 under the action of the axial flow fan 52, thereby improving the circulation efficiency and drying efficiency of the gas. A fixed shaft 53 is coaxially fixedly installed on the air guide plate 51, and the microchannel condenser 6 is connected to the fixed shaft 53 and is connected to a cooler. A precooling plate 31 is coaxially fixedly connected in the precooling cylinder 3. The precooling plate 31 is spiral in shape. The arrangement of the precooling plate 31 can further improve the precooling effect of the gas, so that the gas can be effectively cooled and compressed before entering the drying tower 5. This design helps to improve the drying efficiency and energy utilization of the entire device. The rotary gas valve 4 is rotatably connected to the drying tower 5.

[0037] Working principle: When in use, the outer cylinder 1 and the inner cylinder 2 are driven to drive the precooling cylinder 3 and the drying tower 5 to rotate, and the compressed gas to be dried is introduced from the bottom of the precooling cylinder 3. After entering the precooling cylinder 3, the compressed gas will be cooled by the precooling plate 31, and when the precooling plate 31 rotates with the precooling cylinder 3, the compressed gas will also rotate in a spiral, which can not only improve the heat exchange efficiency of the compressed gas and the precooling cylinder 3, but also further compress the compressed gas. The compressed gas in the precooling cylinder 3 will then pass through the rotary air valve 4 (the internal structure of the rotary air valve 4 is not shown) and enter the drying tower 5 for adsorption drying. When the adsorbent 9 in one group of drying towers 5 is saturated, the group of drying towers 5 enters the regeneration process, and the rotary air valve 4 is used to connect the precooling cylinder 3 to another group of drying towers 5 to adsorb and dry the compressed gas. Multiple groups of drying towers 5 circulate in sequence to adsorb and dry the gas, thereby improving the drying efficiency of the device.

[0038] During the adsorption drying process of the drying tower 5, the rotating air guide plate 51 causes the compressed gas entering from the top of the drying tower 5 to flow in a spiral. The path of the spirally flowing gas in the drying tower 5 is greatly extended, so that the contact time between the gas and the adsorbent 9 is increased, thereby improving the drying efficiency. During the adsorption process, the microchannel condenser 6 operates to reduce the temperature of the air guide plate 51 and the adsorbent 9, thereby drying the gas. Since the microchannel condenser 6 (evaporation temperature -10°C to 5°C) directly cools the adsorbent 9 through the air guide plate 51, the temperature of the adsorbent 9 is maintained at 25-40°C (conventional external cooling needs to be pre-cooled to below 15°C, and there is heat exchange loss), the capture efficiency of the adsorbent 9 for moisture is improved; during the regeneration process, the electric auxiliary heating structure 7 operates to increase the temperature of the air guide plate 51 and the adsorbent 9, thereby regenerating the adsorbent 9. Since the electric auxiliary heating is embedded in the outer plate 512 of the air guide plate 51, the air guide plate 51 can be quickly heated, and the heat damage is low. At the same time, the heat is transferred along the spiral airflow path, thereby reducing the regeneration energy consumption. The rotation of the spiral air guide plate 51 reduces the standard deviation of the condensation / heating temperature distribution from ±15°C of the traditional compression heat adsorption dryer to ±3°C. In addition, in the structure of the present invention, the compressed gas can circulate in multiple drying towers 5 through the rotary air valve 4, which enables the present invention to perform two-tower adsorption drying and two-tower regeneration during the gas drying process, and this mode is gradient adsorption drying and gradient adsorption regeneration. Gradient adsorption drying is that the compressed gas first enters a group of drying towers 5 from the pre-cooling cylinder 3 for adsorption drying, and then enters another group of drying towers 5 from the bottom of this group of drying towers 5, and the two groups of drying towers 5 can reuse cold energy. The gas cooled in the first group of drying towers 5 enters the second group of drying towers 5 for cooling, which improves the cooling efficiency of the drying towers 5 for the compressed gas. The gradient regeneration is the same as the gradient adsorption drying. At the same time, since the external heat exchanger and the regeneration fan are eliminated in the present invention, the equipment footprint is greatly reduced.

[0039] During the operation of the drying tower 5, the rotation of the drying tower 5 will drive the axial flow fan 52 to rotate together. When the axial flow fan 52 rotates, it will drive the gas flow in the drying tower 5, disrupting the original movement state of the air along the air guide plate 51, thereby improving the drying efficiency of the drying tower 5. By controlling the rotation of the rotating outer ring 522 by the driving module 8, the inclination angle of the sliding blade 523 can be adjusted, thereby adjusting the wind direction generated by the axial flow fan 52 during the rotation process. Since the two ends of the sliding blade 523 are respectively hinged to the rotating outer ring 522 and the fixed inner ring 521, when the rotating outer ring 522 rotates, it can drive the outer side of the sliding blade 523 to move relative to the inner side, thereby achieving the angle adjustment of the sliding blade 523. During the adjustment process, the telescopic sliding of the sliding sheet 524 and the fixed sheet 525 can effectively avoid the change of the length of the sliding blade 523 caused by the angle. When the driving module 8 drives the rotating outer ring 522 to rotate back and forth, it will cause the reciprocating change of the inclination angle of the sliding blade 523. In this process, since the rotation direction of the drying tower 5 remains unchanged, such as Fig.11 When the sliding blade 523 changes its tilt angle, the wind direction of the axial flow fan 52 will change (for example, when the drying tower 5 rotates counterclockwise, the axial flow fan 52 initially blows air from the inner plate 511 to the outer plate 512, as shown in FIG. Fig.12 As shown, when the sliding blade 523 changes its inclination angle, it blows air from the outer plate 512 to the inner plate 511, as shown in FIG. Fig.13 As shown in the figure, the reciprocating change of wind direction can make the compressed gas present a reciprocating flow between the inner plate 511 and the outer plate 512. Since the inner plate 511 and the outer plate 512 are both provided with adsorbent 9, this design breaks the single spiral path of the gas along the air guide plate 51, increases the contact area and time between the gas and the adsorbent 9 on the inner plate 511 and the outer plate 512, and thus significantly improves the adsorption efficiency. In addition, the reciprocating flow makes the gas more evenly distributed in the drying tower 5, avoids the phenomenon that some areas are not fully utilized when the gas moves along the air guide plate 51, and maximizes the utilization rate of the adsorbent 9.

[0040] During the regeneration process, centrifugal force is applied to the adsorbent 9 through the rotation of the drying tower 5 so that the moisture adsorbed inside the adsorbent 9 is squeezed outward under the action of the centrifugal force, detached from the microporous structure of the adsorbent 9, and gathered on the surface of the adsorbent 9, making it easier to be carried away by the flowing compressed gas. The gas can absorb moisture more efficiently, avoiding the problem of slow desorption caused by moisture retention in traditional regeneration.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-tower surrounding drying device, comprising a driving outer cylinder (1) and a driving inner cylinder (2), wherein a precooling cylinder (3) is coaxially arranged inside the driving inner cylinder (2), and two or more drying towers (5) are arranged between the driving outer cylinder (1) and the driving inner cylinder (2), characterized in that: The top of the precooling cylinder (3) is rotatably connected to a rotary air valve (4), and the rotary air valve (4) is connected to two or more drying towers (5). When the driving outer cylinder (1) and the driving inner cylinder (2) rotate, the precooling cylinder (3) and the drying tower (5) are driven to rotate; a spiral-shaped air guide plate (51) is arranged inside the drying tower (5), and an adsorbent (9) is arranged on the air guide plate (51). The air guide plate (51) includes an inner plate (511) and an outer plate (512). A microchannel condenser (6) is arranged inside the inner plate (511), and an electric auxiliary heating structure (7) is arranged inside the outer plate (512). When the drying tower (5) rotates, the gas flows in a spiral direction along the air guide plate (51). The microchannel condenser (6) is started during adsorption, and the electric auxiliary heating structure (7) is started during regeneration; A variable-direction axial flow fan (52) is coaxially arranged between the inner plate (511) and the outer plate (512), and a driving module (8) for controlling the angle of the axial flow fan (52) is arranged at the top and bottom of the drying tower (5). When the drying tower (5) rotates, the driving module (8) generates different wind directions by changing the inclination angle of the axial flow fan (52).

2. The multi-tower surrounding drying device according to claim 1, characterized in that: The axial flow fan (52) comprises a fixed inner ring (521), a rotating outer ring (522), and sliding blades (523); the diameter of the fixed inner ring (521) is smaller than the diameter of the rotating outer ring (522); the fixed inner ring (521) is coaxially fixedly mounted on the inner plate (511); the rotating outer ring (522) is coaxially rotatably mounted on the outer plate (512); the top and bottom of the rotating outer ring (522) are rotatably connected to the drying tower (5); and a plurality of groups of rotating blades (523) are arranged between the rotating outer ring (522) and the fixed inner ring (521). The sliding blade (523) has one end hinged to the fixed inner ring (521), and the other end hinged to the rotating outer ring (522). The sliding blade (523) can slide and retract. The top and bottom of the rotating outer ring (522) are meshed with the driving end of the driving module (8). When the driving module (8) drives the rotating outer ring (522) to rotate, the rotating outer ring (522) drives the sliding blade (523) to change the inclination angle of the sliding blade (523).

3. The multi-tower surrounding drying device according to claim 2, characterized in that: When the driving module (8) rotates back and forth periodically, the rotating outer ring (522) drives the sliding blades (523) to rotate back and forth periodically, thereby generating a reciprocating periodic gas flow within the drying tower (5) and between the outer plate (512) and the inner plate (511).

4. The multi-tower surrounding drying device according to claim 2, characterized in that: The sliding fan blade (523) comprises a sliding sheet (524) and a fixing sheet (525), the sliding sheet (524) and the fixing sheet (525) are slidably connected to each other, and an elastic structure (526) is connected between the sliding sheet (524) and the fixing sheet (525).

5. The multi-tower surrounding drying device according to claim 1, characterized in that: The inner and outer walls of the driving inner cylinder (2) are respectively meshed with the precooling cylinder (3) and the drying tower (5) for transmission, and the inner wall of the driving outer cylinder (1) is meshed with the drying tower (5) for transmission.

6. The multi-tower surrounding drying device according to claim 2, characterized in that: Ventilation holes are provided on the walls of the fixed inner ring (521) and the rotating outer ring (522).

7. The multi-tower surrounding drying device according to claim 1, characterized in that: A fixed shaft (53) is coaxially fixedly mounted on the air guide plate (51), and the microchannel condenser tube (6) is in communication with the fixed shaft (53) and is connected to a cooler.

8. The multi-tower surrounding drying device according to claim 1, characterized in that: A precooling plate (31) is coaxially fixedly connected inside the precooling cylinder (3); the precooling plate (31) is spiral in shape, and the rotary air valve (4) is rotationally connected to the drying tower (5).

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