Condensation and adsorption comprehensive dehumidification drying machine without heater and drying method

Abstract

The invention relates to the technical field of drying machines, in particular to a condensation and adsorption comprehensive dehumidification drying machine free of a heater and a drying method.The condensation and adsorption comprehensive dehumidification drying machine comprises a heat exchange system and two drying towers, the two drying towers are connected in parallel through a connecting pipeline, and the heat exchange system comprises two heat exchangers; the two heat exchangers are arranged in the two drying towers respectively and are connected in series through a heat exchange pipeline, a compressor, a valve and an expansion joint are arranged on the heat exchange pipeline, the compressor is used for compressing a refrigerant in the heat exchange pipeline into high-temperature and high-pressure gas from low-temperature and low-pressure gas, and the expansion joint is used for converting normal-temperature and high-pressure liquid into low-temperature and low-pressure liquid; the valve is used for controlling the flow direction of refrigerants in the heat exchangers, so that the two heat exchangers are switched between refrigerating and heating. A set of heat exchange system is added to replace an existing heating cylinder, a large amount of heating energy consumption can be saved, and the adsorption efficiency of the drying agent is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dryers, and in particular to a heater-free condensation adsorption comprehensive dehumidification dryer and a drying method. Background Art

[0002] like Figure 1 As shown, the existing dust removal air compressor dryer includes two drying towers 1, namely Tower A and Tower B, desiccant 101 is set in Tower A and Tower B, the bottom of Tower A and Tower B are connected with exhaust water inlet pipe 9 and air inlet pipe 7, 3# pneumatic valve 12 and 4# pneumatic valve 13 are set on the exhaust water inlet pipe 9, 1# pneumatic valve 10 and 2# pneumatic valve 11 are set on the air inlet pipe 7, the top of Tower A and Tower B are connected with air outlet pipe, 1# one-way valve 14, 2# one-way valve 15, 3# one-way valve 16, 4# one-way valve 17, manual valve 18, heating cylinder 19 are set on the air outlet pipe.

[0003] The working principle of the ash removal air compressor dryer is as follows: if tower A is adsorbing and tower B is regenerating, PLC controls the corresponding solenoid valves to open pneumatic valves 1#10 and 4#13, and close pneumatic valves 2#11 and 3#12. The compressed air to be dried enters from the air inlet 6, flows through the 1#1 pneumatic valve 10 to the lower part of tower A, and flows through the desiccant 101 from bottom to top in tower A. The moisture in the compressed air to be dried is adsorbed. After the dried compressed air passes through the 1# check valve 14, 94% of the gas is discharged from the air outlet 20, and about 6% of the dry compressed air enters the heating cylinder 19 through the manual valve 18 and flows through the B tower after heating, taking away the moisture of the desiccant 101 in tower B, and finally discharged from the exhaust water outlet 8 through the 4#1 pneumatic valve 13. This working state lasts for 1 hour, and then switches to the working state of "B tower adsorbs A tower regenerates" (the 4 pneumatic valves become opposite states, and the working process can be known in the same way), and so on. However, the energy efficiency ratio of the heater of the heating tube 19 is always 1 (the energy efficiency ratio is equal to the ratio of heating power to input power), and 1 kWh of electricity can only generate 1 kWh of heat. The energy consumption required to heat 6% dry compressed air is relatively high. Summary of the invention

[0004] The purpose of the present invention is to address the defects of the prior art and provide a heater-free condensation adsorption comprehensive dehumidification dryer and drying method. By adding a heat exchange system to replace the existing heating cylinder, a large amount of heating energy consumption can be saved and the adsorption efficiency of the desiccant is improved.

[0005] In order to solve the above technical problems, in the first aspect, the present invention provides a heater-free condensation adsorption comprehensive dehumidification dryer, including a heat exchange system and two drying towers, the two drying towers are connected in parallel through a connecting pipe, the two drying towers are provided with an air inlet and an air outlet, and desiccant is provided in the two drying towers. The desiccant is used to adsorb moisture in the air entering the drying tower from the air inlet. The heat exchange system includes two heat exchangers, the two heat exchangers are respectively arranged in the two drying towers, and the two heat exchangers are connected in series through a heat exchange pipe. A compressor, a valve, and an expansion joint are provided on the heat exchange pipe. The compressor is used to compress the refrigerant in the heat exchange pipe from a low-temperature and low-pressure gas into a high-temperature and high-pressure gas, the expansion joint is used to convert a normal temperature and high-pressure liquid into a low-temperature and low-pressure liquid, and the valve is used to control the flow direction of the refrigerant in the heat exchanger, so that the two heat exchangers are converted between cooling and heating.

[0006] Furthermore, the valve comprises a two-position four-way solenoid valve.

[0007] In some embodiments, the drying tower includes a tower body, in which a drying chamber and a flow channel are arranged, one end of the drying chamber is connected to the air inlet of the drying tower, and the other end of the drying chamber is connected to the flow channel, the desiccant is arranged in the drying chamber, the flow channel is connected to the air outlet of the drying tower, and the heat exchanger is arranged in the flow channel.

[0008] Furthermore, the flow channel is arranged outside the cavity wall of the drying cavity.

[0009] Furthermore, a first cylinder is arranged in the tower body, the bottom of the first cylinder is connected to the bottom of the tower body, a first channel is arranged between the top of the first cylinder and the top of the tower body, the drying chamber is formed in the first cylinder, the flow channel is formed between the first cylinder and the tower body, and the flow channel is connected to the drying chamber through the first channel.

[0010] Furthermore, a second cylinder is arranged in the tower body, the diameter of the second cylinder is larger than the diameter of the first cylinder, the top of the second cylinder is connected to the top of the tower body, a second channel is arranged between the bottom of the second cylinder and the bottom of the tower body, a first flow channel is formed between the second cylinder and the first cylinder, a second flow channel is formed between the second cylinder and the tower body, the upper end of the first flow channel is connected to the drying chamber through the first channel, the lower end of the first flow channel is connected to the lower end of the second flow channel through the second channel, and the upper end of the second flow channel is connected to the air outlet of the tower body.

[0011] In some embodiments, the heat exchanger includes a heat exchange tube, and the heat exchange tube is spirally arranged on the outer side of the cavity wall of the drying cavity.

[0012] Furthermore, fins are arranged on the heat exchange tubes.

[0013] In some embodiments, a gas-liquid separator is provided on the tower body, and the gas-liquid separator is used to separate condensed water in the flow channel.

[0014] In a second aspect, the present invention provides a drying method of a heater-free condensation adsorption integrated dehumidification dryer, comprising:

[0015] The two drying towers are Tower A and Tower B;

[0016] When Tower A is working to absorb water and Tower B is regenerating to drain water, the compressor is turned on and the two-position four-way solenoid valve is controlled to allow the refrigerant to flow from Tower A to Tower B through the compressor, so that the heat exchanger in Tower B releases heat, regenerates the desiccant in Tower B, and the heat exchanger in Tower A absorbs heat, increasing the humidity of the compressed air in Tower A;

[0017] When Tower B is working to absorb water and Tower A is regenerating and draining water, turn on the compressor and control the two-position four-way solenoid valve to allow the refrigerant to flow from Tower B to Tower A through the compressor, causing the heat exchanger in Tower A to release heat, regenerating the desiccant in Tower A, and the heat exchanger in Tower B to absorb heat, thereby increasing the humidity of the compressed air in Tower B.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention arranges a heat exchanger in a drying tower and compresses the refrigerant by a compressor, so that the heat exchanger corresponding to the drying tower for working water absorption absorbs heat, and the heat exchanger corresponding to the drying tower for regeneration and drainage releases heat. The temperature in the drying tower for working water absorption decreases, so that the relative humidity of the compressed air to be dried increases, and the moisture in the compressed air is more easily precipitated, thereby improving the water absorption efficiency of the desiccant. The temperature in the drying tower for regeneration and drainage increases, and the desiccant is regenerated and moisture is precipitated under a high temperature environment. The heater in the heating cylinder can stop working. The working principle of the heat exchange system is similar to that of an air conditioner. Since the energy efficiency ratio of heating through the air conditioner mechanism is about 1:3, that is, 1 kWh of electricity can generate more than 3 kWh of heat, a large amount of heating energy consumption can be saved compared to using a heating cylinder.

[0020] 2. The present invention arranges the first cylinder so that the flow channel is arranged outside the drying chamber. For the drying tower for working water absorption, the drying chamber is always subjected to the heat absorption effect of the refrigerant in the flow channel and maintains a low temperature state, so that the relative humidity of the compressed air entering the drying chamber increases, and the moisture in the compressed air is more likely to precipitate, thereby improving the water absorption efficiency of the desiccant. For the drying tower for regeneration and drainage, the drying chamber is always subjected to the heat dissipation effect of the refrigerant in the flow channel and maintains a high temperature state, so that the moisture in the desiccant in the drying chamber is more likely to precipitate, and the compressed air first passes through the flow channel to increase the temperature and then passes through the desiccant to take away the moisture in the desiccant, thereby improving the regeneration efficiency.

[0021] 3. The present invention increases the length of the flow channel by providing the second cylinder, which is beneficial to improving the heating and cooling effects of the compressed air, as well as the heating and cooling effects of the drying chamber.

[0022] 4. The heat exchange tubes of the present invention are provided with fins, which further improves the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a ash removal air compressor dryer in the prior art;

[0024] Figure 2 It is a schematic diagram of the structure of the two-position four-way solenoid valve of the drying tower of the present invention working on the right;

[0025] Figure 3 It is a structural schematic diagram of the two-position four-way solenoid valve of the drying tower of the present invention working on the left;

[0026] Figure 4 It is a schematic diagram of the internal structure of the drying tower of the present invention;

[0027] Figure 5 This is the flow diagram of compressed air in two drying towers according to the present invention.

[0028] Figure numerals: drying tower 1; desiccant 101; first cylinder 102; second cylinder 103; first flow channel 104; second flow channel 105; first channel 106; second channel 107; gas-liquid separator 108; heat exchanger 2; heat exchange tube 201; fin 202; compressor 3; two-position four-way solenoid valve 4; expansion joint 5; air inlet 6; air inlet pipe 7; exhaust water outlet 8; exhaust water outlet pipe 9; 1# pneumatic valve 10; 2# pneumatic valve 11; 3# pneumatic valve 12; 4# pneumatic valve 13; 1# check valve 14; 2# check valve 15; 3# check valve 16; 4# check valve 17; manual valve 18; heating cylinder 19; air outlet 20; heat exchange pipe 21. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] like Figure 2As shown, the present invention provides a heater-free condensation adsorption integrated dehumidification dryer, comprising a heat exchange system and two drying towers 1, the two drying towers 1 are connected in parallel through a connecting pipe, the two drying towers 1 are both provided with an air inlet and an air outlet, the air inlet is provided at the bottom of the drying tower 1, the air outlet is provided at the top of the drying tower 1, and a desiccant 101 is provided in the two drying towers 1, and the desiccant 101 is used to absorb moisture in the air entering the drying tower 1 from the air inlet;

[0031] Among them, the two drying towers 1 are tower A and tower B respectively, and the connecting pipeline includes an air inlet pipeline 7 and an exhaust water outlet pipeline 9, the air inlet pipeline 7 and the exhaust water outlet pipeline 9 are connected in parallel, the air inlet pipeline 7 is provided with an air inlet 6, a 1# pneumatic valve 10, and a 2# pneumatic valve 11, and the 1# pneumatic valve 10 and the 2# pneumatic valve 11 are arranged on both sides of the air inlet 6, and the exhaust water outlet pipeline 9 is provided with an exhaust water outlet 8, a 3# pneumatic valve 12, and a 4# pneumatic valve 13, and the 3# pneumatic valve 12 and the 4# pneumatic valve 13 are arranged at the exhaust water outlet On both sides of 8, the two ends of the air inlet pipe 7 are respectively connected to the air inlets of the two drying towers 1. By opening the 1# pneumatic valve 10 or the 2# pneumatic valve 11, the compressed air to be dried enters the A tower or the B tower through the air inlet pipe 7. The two ends of the exhaust water inlet pipe 9 are respectively connected to the air inlets of the two drying towers 1. By opening the 3# pneumatic valve 12 or the 4# pneumatic valve 13, the dried compressed air takes away the moisture of the desiccant 101 of the A tower or the B tower and is discharged through the exhaust water inlet 8 of the exhaust water inlet pipe 9. The dryer is also called a molecular sieve, which is composed of aluminum oxide and calcium oxide.

[0032] The heat exchange system includes two heat exchangers 2, which are arranged in two drying towers 1 respectively. The two heat exchangers 2 are connected in series through a heat exchange pipe 21. A compressor 3, a valve, and an expansion joint 5 are arranged on the heat exchange pipe 21. The compressor 3 is used to compress the refrigerant in the heat exchange pipe 21 from low-pressure gas to high-pressure gas. The valve is used to control the flow direction of the refrigerant in the heat exchanger 2, so that the two heat exchangers 2 are converted between cooling and heating. The heat exchange pipe 21 includes a first heat exchange pipe 21 and a second heat exchange pipe 21. The compressor 3 and the valve are arranged on the first heat exchange pipe 21, and the expansion joint 5 is arranged on the second heat exchange pipe 21. One end of the first heat exchange pipe 21 is connected to one end of the heat exchanger 2 of the A tower, and the other end of the first heat exchange pipe 21 is connected to one end of the heat exchanger 2 of the B tower. One end of the second heat exchange pipe 21 is connected to the other end of the heat exchanger 2 of the A tower, and the other end of the second heat exchange pipe 21 is connected to the other end of the heat exchanger 2 of the B tower.

[0033] It can be understood that when the flow direction of the refrigerant is: flowing out of Tower A through the compressor 3 and entering Tower B, the refrigerant is compressed by the compressor 3 into a high-temperature and high-pressure gas, and then enters Tower B and dissipates heat through the heat exchanger 2 in Tower B, so that the temperature in Tower B increases, and the temperature of the dried compressed air entering Tower B also increases, thereby realizing the regeneration of the desiccant 101 in Tower B. The high-temperature and high-pressure refrigerant passes through Tower B and becomes a liquid refrigerant at room temperature and high pressure. The liquid refrigerant passes through the expansion joint 5, and a small hole structure is arranged inside the expansion joint 5, so that the liquid refrigerant at room temperature and high pressure produces a throttling effect when passing through the small hole, thereby reducing the pressure and forming a low-temperature and low-pressure liquid refrigerant. After the low-temperature and low-pressure liquid refrigerant enters Tower A, it can reduce the temperature in Tower A and the temperature of the compressed air to be dried entering Tower A. The lower the air temperature and the higher the humidity, the better it is for improving the adsorption effect of the desiccant 101 in Tower A. Thus, the cycle of adsorption and regeneration of the two drying towers 1 is realized.

[0034] Since the present application directly utilizes the heat exchange system to realize the circulation and regeneration of the two drying towers 1, there is no need to use the heating cylinder 19 to heat the compressed air after drying, and the energy efficiency ratio of the heat exchange system is about 1:3, that is, 1 kWh of electricity can generate more than 3 kWh of heat, which can save a lot of heating energy compared to the use of the heating cylinder 19. And the heating cylinder 19 can be removed.

[0035] Furthermore, the valve comprises a two-position four-way solenoid valve 4 .

[0036] like Figure 2 As shown, when tower B is working to absorb water and tower A is regenerating and draining water, the two-position four-way solenoid valve 4 works on the right side, as shown in FIG. Figure 3 As shown, when tower A is working to absorb water and tower B is regenerating to discharge water, the two-position four-way solenoid valve 4 works on the left.

[0037] In some embodiments, Figure 4 As shown, the drying tower 1 includes a tower body, in which a drying chamber and a flow channel are arranged, one end of the drying chamber is connected to the air inlet of the drying tower 1, and the other end of the drying chamber is connected to the flow channel, the desiccant 101 is arranged in the drying chamber, the flow channel is connected to the air outlet of the drying tower 1, and the heat exchanger 2 is arranged in the flow channel.

[0038] Furthermore, the flow channel is arranged outside the cavity wall of the drying cavity.

[0039] Furthermore, if Figure 4 As shown, a first cylinder 102 is arranged in the tower body, the bottom of the first cylinder 102 is connected to the bottom of the tower body, a first channel 106 is arranged between the top of the first cylinder 102 and the top of the tower body, a drying chamber is formed in the first cylinder 102, a flow channel is formed between the first cylinder 102 and the tower body, and the flow channel is connected to the drying chamber through the first channel 106.

[0040] The present invention arranges the first cylinder 102 so that the flow channel is arranged outside the drying chamber. Figure 5 As shown, the left side is a drying tower 1 for regeneration and drainage, and the right side is a drying tower 1 for working water absorption. The arrows and dotted lines indicate the flow direction of the compressed air in the drying tower 1. For the drying tower 1 for working water absorption, the drying chamber is always subjected to the heat absorption effect of the refrigerant in the flow channel, and maintains a low temperature state, so that the relative humidity of the compressed air entering the drying chamber increases, and the moisture in the compressed air is more easily precipitated, thereby improving the water absorption efficiency of the desiccant 101. For the drying tower 1 for regeneration and drainage, the drying chamber is always subjected to the heat dissipation effect of the refrigerant in the flow channel, and maintains a high temperature state, so that the moisture in the desiccant 101 in the drying chamber is more easily precipitated, and the compressed air first passes through the flow channel to increase the temperature and then passes through the desiccant 101, taking away the moisture in the desiccant 101, thereby improving the regeneration efficiency.

[0041] Furthermore, if Figure 4 As shown, a second cylinder 103 is arranged in the tower body, and the diameter of the second cylinder 103 is greater than the diameter of the first cylinder 102. The top of the second cylinder 103 is connected to the top of the tower body, and a second channel 107 is arranged between the bottom of the second cylinder 103 and the bottom of the tower body. A first flow channel 104 is formed between the second cylinder 103 and the first cylinder 102, and a second flow channel 105 is formed between the second cylinder 103 and the tower body. The upper end of the first flow channel 104 is connected to the drying chamber through the first channel 106, and the lower end of the first flow channel 104 is connected to the lower end of the second flow channel 105 through the second channel 107, and the upper end of the second flow channel 105 is connected to the air outlet of the tower body.

[0042] The present invention increases the length of the flow channel by providing the second cylinder 103, which is beneficial to improving the heating and cooling effects of the compressed air and the heating and cooling effects of the drying chamber.

[0043] In some embodiments, the heat exchanger 2 includes a heat exchange tube 201. The heat exchange tube 201 may be a copper tube. The heat exchange tube 201 is spirally arranged on the outer side of the cavity wall of the drying cavity.

[0044] Furthermore, fins 202 are provided on the heat exchange tube 201. The fins 202 can further improve the heat exchange efficiency.

[0045] In some embodiments, a gas-liquid separator 108 is disposed on the tower body, and the gas-liquid separator 108 is used to separate the condensed water in the flow channel.

[0046] In a second aspect, the present invention provides a drying method of a heater-free condensation adsorption integrated dehumidification dryer, comprising:

[0047] When tower A is working to absorb water and tower B is regenerating and draining water, PLC controls the corresponding solenoid valves to open pneumatic valves 1#10 and 4#13, close pneumatic valves 2#11 and 3#12, turn on compressor 3, and control two-position four-way solenoid valve 4 to work on the left side, so that the refrigerant flows from tower A to tower B through compressor 3, so that the heat exchanger 2 in tower B releases heat and the heat exchanger 2 in tower A absorbs heat. The compressed air to be dried enters from the air inlet 6, flows through the 1#pneumatic valve 10 and enters tower A through the air inlet of tower A. The compressed air to be dried flows from bottom to top through the desiccant 101 in tower A, and the moisture in the compressed air is adsorbed. After the dry compressed air passes through the 1#check valve 14, 94% of the compressed gas is discharged from the air outlet 20, and about 6% of the dry compressed air enters tower B through the manual valve 18, taking away the moisture of the desiccant 101 in tower B, and finally is discharged from the exhaust water outlet 8 through the 4#pneumatic valve 13;

[0048] When tower B is working to absorb water and tower A is regenerating to drain water, PLC controls the corresponding solenoid valves to open pneumatic valves 2#11 and 3#12, close pneumatic valves 1#10 and 4#13, turn on compressor 3, and control two-position four-way solenoid valve 4 to work on the right side, so that the refrigerant flows from tower B to tower A through compressor 3, so that heat exchanger 2 in tower A releases heat and heat exchanger 2 in tower B absorbs heat; compressed air to be dried enters from air inlet 6, flows through 2#pneumatic valve 11 and enters tower B through the air inlet of tower B, and the compressed air to be dried flows from bottom to top through desiccant 101 in tower B, and the moisture in the compressed air is adsorbed. After the dry compressed air passes through 2#check valve 15, 94% of the compressed gas is discharged from air outlet 20, and about 6% of the dry compressed air enters tower A through manual valve 18, taking away the moisture of desiccant 101 in tower A, and finally is discharged from exhaust water outlet 8 through 3#pneumatic valve 12.

[0049] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A heater-free condensation adsorption integrated dehumidification dryer, characterized in that: The invention comprises a heat exchange system and two drying towers (1), wherein the two drying towers (1) are connected in parallel via a connecting pipe, the two drying towers (1) are both provided with an air inlet and an air outlet, and a desiccant (101) is provided in the two drying towers (1), wherein the desiccant (101) is used to absorb moisture in the air entering the drying tower (1) from the air inlet. The heat exchange system comprises two heat exchangers (2), the two heat exchangers (2) are respectively arranged in the two drying towers (1), and the two heat exchangers (2) are connected in series via a heat exchange pipe (21). A compressor (3), a valve, and an expansion joint (5) are provided on the heat exchange pipe (21), wherein the compressor (3) is used to compress the refrigerant in the heat exchange pipe (21) from low-temperature and low-pressure gas into high-temperature and high-pressure gas, the expansion joint (5) is used to convert normal-temperature and high-pressure liquid into low-temperature and low-pressure liquid, and the valve is used to control the flow direction of the refrigerant in the heat exchanger (2), so that the two heat exchangers (2) can be switched between cooling and heating.

2. The heater-free condensation adsorption integrated dehumidification dryer according to claim 1 is characterized in that: The valve comprises a two-position four-way solenoid valve (4).

3. The heater-free condensation adsorption integrated dehumidification dryer according to claim 1 or 2, characterized in that: The drying tower (1) comprises a tower body, a drying chamber and a flow channel are arranged in the tower body, one end of the drying chamber is connected to the air inlet of the drying tower (1), and the other end of the drying chamber is connected to the flow channel, the desiccant (101) is arranged in the drying chamber, the flow channel is connected to the air outlet of the drying tower (1), and the heat exchanger (2) is arranged in the flow channel.

4. The heater-free condensation adsorption integrated dehumidification dryer according to claim 3 is characterized in that: The flow channel is arranged outside the cavity wall of the drying cavity.

5. The heater-free condensation adsorption integrated dehumidification dryer according to claim 4, characterized in that: A first cylinder (102) is arranged in the tower body, the bottom of the first cylinder (102) is connected to the bottom of the tower body, a first channel (106) is arranged between the top of the first cylinder (102) and the top of the tower body, the drying chamber is formed in the first cylinder (102), the flow channel is formed between the first cylinder (102) and the tower body, and the flow channel is connected to the drying chamber through the first channel (106).

6. The heater-free condensation adsorption integrated dehumidification dryer according to claim 5, characterized in that: A second cylinder (103) is arranged in the tower body, the diameter of the second cylinder (103) is greater than the diameter of the first cylinder (102), the top of the second cylinder (103) is connected to the top of the tower body, a second channel (107) is arranged between the bottom of the second cylinder (103) and the bottom of the tower body, a first flow channel (104) is formed between the second cylinder (103) and the first cylinder (102), a second flow channel (105) is formed between the second cylinder (103) and the tower body, the upper end of the first flow channel (104) is connected to the drying chamber through the first channel (106), the lower end of the first flow channel (104) is connected to the lower end of the second flow channel (105) through the second channel (107), and the upper end of the second flow channel (105) is connected to the air outlet of the tower body.

7. The heater-free condensation adsorption integrated dehumidification dryer according to any one of claims 4 to 6, characterized in that: The heat exchanger (2) comprises a heat exchange tube (201), and the heat exchange tube (201) is arranged in a spiral shape on the outside of the cavity wall of the drying cavity.

8. The heater-free condensation adsorption integrated dehumidification dryer according to claim 7, characterized in that: Fins (202) are provided on the heat exchange tube (201).

9. The heater-free condensation adsorption integrated dehumidification dryer according to claim 3, characterized in that: A gas-liquid separator (108) is arranged on the tower body, and the gas-liquid separator (108) is used to separate condensed water in the flow channel.

10. A drying method of a heater-free condensation adsorption integrated dehumidification dryer according to any one of claims 1 to 9, characterized in that: include: The two drying towers (1) are Tower A and Tower B; When tower A is working to absorb water and tower B is regenerating to drain water, the compressor (3) is turned on and the two-position four-way solenoid valve (4) is controlled to allow the refrigerant to flow from tower A to tower B via the compressor (3), so that the heat exchanger (2) in tower B releases heat, regenerates the desiccant (101) in tower B, and the heat exchanger (2) in tower A absorbs heat, thereby increasing the humidity of the compressed air in tower A; When tower B is working to absorb water and tower A is regenerating to drain water, the compressor (3) is turned on and the two-position four-way solenoid valve (4) is controlled to allow the refrigerant to flow from tower B to tower A through the compressor (3), so that the heat exchanger (2) in tower A releases heat, regenerates the desiccant (101) in tower A, and the heat exchanger (2) in tower B absorbs heat, thereby increasing the humidity of the compressed air in tower B.

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