A rotary dehumidification system coupled with a compression heat pump and an absorption heat pump

Abstract

The application discloses a rotary dehumidification system of a compression heat pump coupled with an absorption heat pump, and belongs to the technical field of heat pump rotary dehumidification. The rotary dehumidification system comprises a treatment system, a regeneration system, an absorption dehumidification system and a low-temperature-stage heat pump system. The treatment system comprises an absorber, an adsorption section of a dehumidification rotor and a surface cooler which are sequentially arranged along the direction of the treatment air flow. The regeneration system comprises a preheater, a solution heat exchanger, a condenser, a regeneration section of the dehumidification rotor and an evaporator which are sequentially arranged along the direction of the regeneration air flow. The absorption dehumidification system comprises an absorber, a generator, a solution heat exchanger and a water-cooled heat exchanger which are connected through liquid pipelines. The low-temperature-stage heat pump system comprises the generator, the absorber and the surface cooler which are connected through low-temperature-stage refrigerant pipelines. The generator water vapor outlet is connected with the preheater. Through coupling and matching of different thermodynamic systems, the effective reduction of the regeneration energy consumption of the deep dehumidification system is realized, and the heat and humidity treatment efficiency of the system is improved.

Description

Technical Field

[0001] This invention belongs to the field of heat pump dehumidification technology, specifically relating to a dehumidification system for a compression heat pump coupled with an absorption heat pump. Background Technology

[0002] Some production workshops have strict requirements for temperature and humidity control. For example, in lithium battery production, the dew point temperature of the workshop air needs to be stably controlled within the range of -40℃ to -60℃ to prevent lithium metal from reacting with moisture to generate hydrogen gas (which poses an explosion risk) or corrosive hydrogen fluoride (which poses a risk of damaging the SEI film), and to ensure the dryness of key processes such as cell filling and packaging. To achieve low dew point conditions, a two-stage rotary dehumidification system is usually used. However, during deep dehumidification (dew point ≤ -40℃), the regeneration section needs to be electrically or steam-heated to 140℃, accounting for more than 60% of the total system energy consumption. Meanwhile, the regeneration exhaust air temperature reaches 60~80℃, and the moisture content is also very high. Direct discharge results in energy waste, and the waste heat from the regeneration exhaust air is not effectively recovered. Overall, the rotary dehumidification systems used in these workshops have low heat and humidity treatment efficiency and high regeneration energy consumption. For example, Chinese invention patent CN117570528A discloses a control method for an energy-saving rotary dehumidifier system based on a two-stage heat pump. This system employs a two-stage rotary dehumidifier and a two-stage heat pump. The treated air sequentially passes through a first filter, a surface cooler, a first-stage rotary desiccant adsorption section, a first treatment fan, a second-stage heat pump evaporator, a second-stage rotary desiccant adsorption section, a second treatment fan, a temperature regulator, and is discharged through a second filter. The regenerated air is in a closed loop, sequentially passing through a second-stage heat pump condenser, a second-stage electric heater, a second-stage rotary regeneration section, a first-stage electric heater, a first-stage heat pump condenser, a first-stage rotary regeneration section, a regeneration fan, and a first-stage heat pump evaporator. However, its application suffers from several problems: the second-stage heat pump evaporator has a low latent heat capacity and low evaporation temperature, leading to large temperature differences and low efficiency in the second-stage heat pump; the closed-loop regeneration air circulation results in high moisture content in the regeneration air, reducing rotary dehumidification efficiency and increasing rotary dehumidification energy consumption. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a rotary dehumidification system that can achieve deep dehumidification and has high heat and humidity treatment efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A rotary dehumidification system of a compression heat pump coupled to an absorption heat pump, comprising a processing system, a regeneration system, an absorption dehumidification system and a low-temperature stage heat pump system;

[0005] The treatment system includes an absorber, an adsorption section of a dehumidifying impeller, and a surface cooler arranged sequentially along the treatment airflow direction. The regeneration system includes a regeneration section consisting of a preheater, a solution heat exchanger, a condenser, a dehumidifying impeller, and an evaporator, arranged sequentially along the regeneration airflow direction; The absorption dehumidification system includes an absorber, a generator, a solution heat exchanger, and a water-cooled heat exchanger connected by liquid pipelines. The low-temperature heat pump system includes a generator, an absorber, and a surface cooler connected via a low-temperature refrigerant pipeline. The generator's steam outlet is connected to the preheater.

[0006] The beneficial effects of this invention are as follows: This invention achieves near-isothermal dehumidification pretreatment of the treated air by coupling and matching different thermodynamic systems such as liquid absorption dehumidification, rotary adsorption dehumidification, compression heat pump, surface cooler, and water-cooled heat exchanger, recovering waste heat from regenerated air for regenerated air heating, and utilizing system thermal energy in a cascade manner, thereby effectively reducing the regeneration energy consumption of the deep dehumidification system and improving the system's thermal and humidity treatment efficiency. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of a rotary dehumidification system of a compression heat pump coupled with an absorption heat pump according to a specific embodiment of the present invention. Figure 2 for Figure 1 A magnified view of point A; Figure 3 for Figure 1 A magnified view of point B; Figure 4 for Figure 1 A magnified view of point C; Figure 5 for Figure 1 A magnified view of point D; Figure 6 A schematic diagram of a rotary dehumidification system for a compression heat pump coupled with an absorption heat pump according to another specific embodiment of the present invention; Figure 7 A schematic diagram of a rotary dehumidification system of a compression heat pump coupled with an absorption heat pump according to another embodiment of the present invention; Label Explanation: 1. Dehumidifying impeller; 101. Regeneration section; 102. Adsorption section; 2. Handling the fan; 3. Surface cooler; 301. Surface cooler refrigerant inlet; 302. Surface cooler refrigerant outlet; 4. Regenerative air fan; 5. Solution heat exchanger; 501. Solution inlet of solution heat exchanger; 502. Solution outlet of solution heat exchanger; 6. Water-cooled heat exchanger; 601. Solution inlet of water-cooled heat exchanger; 602. Solution outlet of water-cooled heat exchanger; 7. Preheater; 701. Preheater steam inlet; 702. Preheater steam outlet; 8. Air cooler; 801. Air cooler steam inlet; 802. Air cooler steam outlet; 9. Electric heater; 11. Absorber; 111. Absorber solution inlet; 112. Absorber solution outlet; 113. Absorber refrigerant inlet; 114. Absorber refrigerant outlet; 12. Throttling valve; 13. Generator; 131. Generator solution inlet; 132. Generator solution outlet; 133. Generator steam outlet; 134. Generator refrigerant inlet; 135. Generator refrigerant outlet; 14. Solution pump; 21. Low-temperature heat pump compressor; 22. Low-temperature heat pump throttling valve; 31. Evaporator; 311. Evaporator refrigerant inlet; 312. Evaporator refrigerant outlet; 32. High-temperature heat pump compressor; 33. Condenser; 331. Condenser refrigerant inlet; 332. Condenser refrigerant outlet; 34. High-temperature heat pump throttling valve; 41. Cooling water inlet; 42. Cooling water outlet. Detailed Implementation

[0008] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0009] Please refer to Figure 1 The present invention provides a rotary dehumidification system for a compression heat pump coupled with an absorption heat pump, comprising a processing system, a regeneration system, an absorption dehumidification system, and a low-temperature stage heat pump system; The treatment system includes an absorber 11, an adsorption section 102 of a dehumidifying impeller 1, and a surface cooler 3 arranged sequentially along the treatment airflow direction; The regeneration system includes a regeneration section 101 consisting of a preheater 7, a solution heat exchanger 5, a condenser 33, a dehumidifying rotor 1, and an evaporator 31 arranged sequentially along the regeneration airflow direction; The absorption dehumidification system includes an absorber 11, a generator 13, a solution heat exchanger 5, and a water-cooled heat exchanger 6 connected by liquid pipelines. The low-temperature heat pump system includes a generator 13, an absorber 11, and a surface cooler 3 connected via a low-temperature refrigerant pipeline; The steam outlet 133 of the generator is connected to the preheater 7.

[0010] A typical two-stage rotary dehumidifier system consists of two rotors, three surface coolers, two electric heaters, a fan, and filters. The treated air is cooled and dehumidified by the first-stage surface cooler, then enters the first-stage rotor adsorption section for further dehumidification. The treated air is then split into two streams: one stream enters the second-stage surface cooler for further cooling and then enters the second-stage rotor adsorption section for further dehumidification, reaching the required dew point temperature, before passing through the third-stage surface cooler to reach the required supply air temperature; the other stream, as regeneration air, is heated by the second-stage electric heater and enters the second-stage rotor regeneration section. The regeneration air from the second-stage rotor regeneration section is heated by the first-stage electric heater and then enters the first-stage rotor regeneration section, finally being discharged outdoors. In this type of dehumidifier system, the rotor dehumidification process is a near-adiabatic adsorption process. The temperature rise during adsorption affects adsorption performance, therefore the treated air requires pre-treatment by cooling. The treated air is first significantly cooled, then significantly heated, and then significantly cooled again to the supply air temperature. This pre-treatment requires a large cooling capacity, and the two-stage rotor system requires an even larger cooling capacity. To achieve high rotor adsorption efficiency, the pretreatment temperature of the processing air is low, resulting in low evaporation temperature, low performance of the refrigeration system, and high power consumption. The rotor regeneration exhaust air is high-temperature and high-humidity air, and direct discharge leads to heat energy waste. Furthermore, there is temperature overlap between the processing air and the regeneration air, failing to achieve heat energy recovery from both.

[0011] As described above, the beneficial effects of this invention are as follows: This invention does not use a surface cooler or a single-stage dehumidifier for pre-treatment of the processed air. Instead, it utilizes the dehumidifier's adsorption capacity to achieve a low dew point. An open absorber with direct refrigerant expansion and evaporative cooling is installed between the processed air inlet and the adsorption section of the dehumidifier dehumidifier, achieving near-isothermal dehumidification pre-treatment of the processed air. This effectively cools and dehumidifies the processed air at high evaporation temperatures in the refrigeration system, improving refrigeration system performance. By matching the regenerated air with a high-temperature compression heat pump, the waste heat from the dehumidifier exhaust is recovered for regenerated air heating, resulting in a heat pump efficiency exceeding 2 (electricity to heat), effectively reducing regeneration power consumption. By matching a compression heat pump to the absorption dehumidification system, processed air cooling, processed air heat recovery, regenerated air preheating, and system thermal balance are achieved, enabling cascaded energy utilization. Ultimately, the dehumidifier dehumidification system achieves low dew point dehumidification while improving regeneration efficiency and reducing regeneration energy consumption.

[0012] Reference Figure 1 , Figure 6 and Figure 7 Furthermore, the regenerated air comes entirely from fresh air, or from a combination of treated air and fresh air, or from a combination of treated air and fresh air.

[0013] As described above, the pre-treated air from the absorber is diverted as regeneration air to reduce the moisture content of the regeneration air, thereby improving the regeneration efficiency and performance of the rotor.

[0014] Reference Figure 1 , Figure 6 and Figure 7 Furthermore, the rotary dehumidification system of the compression heat pump coupled to the absorption heat pump also includes a high-temperature heat pump system; the high-temperature heat pump system includes a condenser 33, a high-temperature heat pump throttle valve 34, an evaporator 31 and a high-temperature heat pump compressor 32 connected through a high-temperature refrigerant pipeline.

[0015] As described above, high-temperature heat pumps are installed before and after the rotary regeneration section, the condenser is placed between the fan and the electric heater, and the evaporator is placed at the exhaust of the rotary regeneration section.

[0016] Preferably, the high-temperature heat pump system uses a refrigerant with a critical temperature >80°C.

[0017] Furthermore, the refrigerant direct expansion evaporation in the absorber 11 is connected in series with the refrigerant direct expansion evaporation in the surface cooler 3, and together with the refrigerant condensation in the generator 13, they form a low-temperature stage heat pump system.

[0018] As described above, the surface cooler is equivalent to a low-temperature heat pump evaporator, which, together with the absorber, generator, low-temperature heat pump compressor, and low-temperature heat pump throttling valve, forms a new, unconventional heat pump system.

[0019] Preferably, the low-temperature heat pump system uses a refrigerant with a critical temperature of <80°C.

[0020] Reference Figure 1 , Figure 6 and Figure 7 Furthermore, the dehumidification system of the compression heat pump coupled to the absorption heat pump also includes a cooling water pipeline that passes through the water-cooled heat exchanger 6 for cooling the water-cooled heat exchanger 6.

[0021] Furthermore, the rotary dehumidification system of the compression heat pump coupled to the absorption heat pump also includes an air cooler 8. The generator steam outlet 133 of the generator 13, the preheater 7, and the air cooler 8 are connected in sequence via steam pipelines. Steam enters the preheater 7 from the generator steam outlet 133 through the preheater steam inlet 701, then enters the air cooler 8 from the preheater steam outlet 702 through the air cooler steam inlet 801, and finally exits from the air cooler steam outlet 802, entering the subsequent system.

[0022] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 Furthermore, the dehumidification system of the compression heat pump coupled to the absorption heat pump also includes a cooling water pipeline, and the water-cooled heat exchanger 6 and the air cooler 8 are connected in parallel through the cooling water pipeline.

[0023] As described above, the steam generated by the generator is used to preheat the regeneration air, and is further cooled by cooling water in the air cooler, where it is completely condensed into liquid water. The high-temperature, high-concentration solution generated by the generator is used for further preheating of the regeneration air, and is further cooled by cooling water in a water-cooled heat exchanger.

[0024] Reference Figure 1 , Figure 6 and Figure 7 Furthermore, the regeneration system includes a regeneration section 101 consisting of a preheater 7, a solution heat exchanger 5, a condenser, an electric heater 9, a dehumidifying impeller 1, and an evaporator 31 arranged sequentially along the regeneration airflow direction.

[0025] Reference Figure 1 , Figure 6 and Figure 7 Furthermore, the regeneration system includes a regeneration section 101 and an evaporator 31, which are arranged sequentially along the regeneration airflow direction, consisting of a preheater 7, a solution heat exchanger 5, a regeneration fan 4, a condenser 33, an electric heater 9, and a dehumidifying impeller 1.

[0026] Furthermore, both the generator 13 and the absorber 11 are falling film absorbers. Preferably, the generator 13 and the absorber 11 are made of corrosion-resistant materials, such as titanium or stainless steel.

[0027] Furthermore, the solution in generator 13 undergoes near-isothermal vacuum desorption, and is heated by refrigerant condensation.

[0028] Furthermore, the absorption solution can be an aqueous solution of lithium bromide or an aqueous solution of lithium chloride.

[0029] Furthermore, the evaporator 31 is a finned tube heat exchanger, preferably a finned tube heat exchanger with a hydrophilic coating.

[0030] Furthermore, the solution heat exchanger 5 and the preheater 7 are integral finned tube heat exchangers.

[0031] Reference Figures 1-7 Furthermore, according to the airflow direction, the absorber 11 is connected to the air inlet side of the adsorption section 102 of the dehumidifying rotor 1, the air outlet side of the adsorption section 102 of the dehumidifying rotor 1 is connected to the air inlet of the processing fan 2, the air outlet of the processing fan 2 is connected to the air inlet side of the surface cooler 3, and the air outlet side of the surface cooler 3 is connected to the processing space.

[0032] According to the regeneration air flow direction, the air outlet side of the preheater 7 is connected to the air inlet side of the water-cooled heat exchanger 6, the air outlet side of the water-cooled heat exchanger 6 is connected to the air inlet of the regeneration fan 4, the air outlet of the regeneration fan 4 is connected to the air inlet side of the condenser, the air outlet side of the condenser is connected to the air inlet side of the electric heater 9, the air outlet side of the electric heater 9 is connected to the air inlet side of the regeneration section 101 of the dehumidification rotor 1, the air outlet side of the regeneration section 101 of the dehumidification rotor 1 is connected to the air inlet side of the evaporator, and the air outlet side of the evaporator is connected to the outdoor environment.

[0033] According to the refrigerant flow direction of the high-temperature heat pump, the exhaust port of the high-temperature heat pump compressor is connected to the refrigerant inlet 331 of the condenser, the refrigerant outlet 332 of the condenser is connected to the inlet of the high-temperature heat pump throttle valve 34, the outlet of the high-temperature heat pump throttle valve 34 is connected to the refrigerant inlet 311 of the evaporator, and the refrigerant outlet 312 of the evaporator is connected to the air inlet of the high-temperature heat pump compressor 32.

[0034] According to the refrigerant flow direction of the low-temperature heat pump, the exhaust port of the low-temperature heat pump compressor 21 is connected to the refrigerant inlet 134 of the generator, the refrigerant outlet 135 of the generator is connected to the inlet of the low-temperature heat pump throttle valve 22, the outlet of the low-temperature heat pump throttle valve 22 is connected to the refrigerant inlet 113 of the absorber, the refrigerant outlet 114 of the absorber is connected to the refrigerant inlet 301 of the surface cooler, and the refrigerant outlet 302 of the surface cooler is connected to the suction port of the low-temperature heat pump compressor 21.

[0035] According to the solution flow direction of the absorption dehumidification system, the absorber solution outlet 112 is connected to the inlet of the throttle valve 12, the outlet of the throttle valve 12 is connected to the generator solution inlet 131, the generator solution outlet 132 is connected to the inlet of the solution pump 14, the outlet of the solution pump 14 is connected to the solution inlet 501 of the solution heat exchanger, the solution outlet 502 of the solution heat exchanger is connected to the solution inlet 601 of the water-cooled heat exchanger, and the solution outlet 602 of the water-cooled heat exchanger is connected to the absorber solution inlet 111.

[0036] The water-cooled heat exchanger 6 and the air cooler 8 are connected in parallel according to the direction of the cooling water.

[0037] Please refer to Figure 7 Embodiment 1 of the present invention is: a rotary dehumidification system of a compression heat pump coupled to an absorption heat pump, comprising a processing system, a regeneration system, an absorption dehumidification system, a high-temperature stage heat pump system and a low-temperature stage heat pump system; The treatment system includes an absorber 11, an adsorption section 102 of a dehumidifying impeller 1, and a surface cooler 3 arranged sequentially along the treatment airflow direction; The regeneration system includes a regeneration section 101 consisting of a preheater 7, a solution heat exchanger 5, a condenser 33, a dehumidifying rotor 1, and an evaporator 31 arranged sequentially along the regeneration airflow direction; The absorption dehumidification system includes an absorber 11, a generator 13, a solution heat exchanger 5, and a water-cooled heat exchanger 6 connected by liquid pipelines. The high-temperature heat pump system includes a condenser 33, a high-temperature heat pump throttling valve 12, an evaporator 31, and a high-temperature heat pump compressor 32, which are connected by high-temperature refrigerant piping. The low-temperature heat pump system includes a generator 13, a low-temperature heat pump throttle valve 22, an absorber 11, a surface cooler 3, and a low-temperature heat pump compressor 21, all connected via low-temperature refrigerant piping. The steam outlet of generator 13 is connected to preheater 7; It also includes cooling water pipes and an air cooler, with the water-cooled heat exchanger 6 and the air cooler connected in parallel via cooling water pipes.

[0038] The working principle of this invention is as follows: After the treated air passes through the absorber 11 to cool and dehumidify, it enters the adsorption section 102 of the dehumidification wheel 1 to adsorb water vapor. The temperature and moisture content of the treated air decrease. The treated air is then drawn by the treated air fan 2 to the (direct expansion) surface cooler 3. After the treated air is cooled to the supply air temperature, it is discharged into the indoor space.

[0039] All regenerated air comes from fresh air. After being heated by the generated water vapor in the preheater 7, the regenerated air enters the solution heat exchanger 5 and is further heated by the generated solution. Then, it is drawn into the condenser 33 by the regenerated fan 4 for heating. Next, it is heated to the required temperature by the electric heater 9 and enters the regeneration section 101 of the dehumidification rotor 1. The exhaust air from the rotor regeneration passes through the evaporator 31 to recover waste heat before being discharged outdoors.

[0040] High-temperature heat pumps recover (absorb) waste heat from regenerated air through an evaporator and discharge heat in a condenser to heat the regenerated air.

[0041] The high-temperature, high-concentration solution at the outlet of generator 13 is pumped into solution heat exchanger 5 by solution pump 14 to heat the regeneration air, and then enters water-cooled heat exchanger 6 to be cooled by cooling water. The low-temperature, high-concentration solution enters absorber 11 to absorb and process water vapor, and is cooled by direct expansion evaporation of low-temperature stage heat pump. The low-temperature, low-concentration solution at the outlet of absorber 11 enters generator 13 after passing through throttle valve 12, and is desorbed by direct expansion condensation of low-temperature stage heat pump. The desorbed water vapor enters preheater 7 to condense and preheat the regeneration air, and then enters air cooler 8 to be completely condensed into liquid water.

[0042] Please refer to Figures 1-5 Embodiment two of the present invention is as follows: The difference from Example 1 is that the regenerated air comes entirely from a portion of the treated air that has been diverted after being processed by the treatment system.

[0043] Please refer to Figure 6 Embodiment 3 of the present invention is as follows: The difference from Example 1 is that the regenerated air comes partly from fresh air and partly from a portion of the treated air that has been diverted after being processed by the treatment system.

[0044] In summary, the rotary dehumidification system of the compression heat pump coupled with the absorption heat pump provided by the present invention has the following advantages: (1) There is no need to use the first-stage rotor and the surface cooler after the first-stage rotor. The pretreatment of the processing air is achieved by using an absorber. Near-isothermal absorption dehumidification replaces near-adiabatic adsorption dehumidification, which increases the evaporation temperature and saves refrigeration capacity, thus improving the overall performance of the refrigeration system.

[0045] (2) The condensation process of the refrigeration system and the generation process of the absorption dehumidification system are coupled together to recover and utilize the energy of the treated air to regenerate the solution. The water vapor and high-temperature industrial generated during regeneration are used to preheat the regeneration air, thereby realizing the cascade utilization of thermal energy.

[0046] (3) Only one direct expansion high-temperature heat pump system is used, eliminating the need for two direct expansion high-temperature heat pump systems, which effectively improves system reliability.

[0047] (4) Without the need for a chiller, the absorption dehumidification system, heat pump system, and preheating system are combined to form a new system through temperature matching, thereby optimizing the overall thermal system rather than just improving a single local thermal system.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rotary dehumidification system for a compression heat pump coupled with an absorption heat pump, characterized in that, This includes a processing system, a regeneration system, an absorption dehumidification system, and a low-temperature heat pump system; The treatment system includes an absorber, an adsorption section of a dehumidifying impeller, and a surface cooler arranged sequentially along the treatment airflow direction. The regeneration system includes a regeneration section consisting of a preheater, a solution heat exchanger, a condenser, a dehumidifying impeller, and an evaporator, arranged sequentially along the regeneration airflow direction; The absorption dehumidification system includes an absorber, a generator, a solution heat exchanger, and a water-cooled heat exchanger connected by liquid pipelines. The low-temperature heat pump system includes a generator, an absorber, and a surface cooler connected via a low-temperature refrigerant pipeline. The generator's steam outlet is connected to the preheater.

2. The rotary dehumidification system according to claim 1, characterized in that, It also includes a high-temperature heat pump system; the high-temperature heat pump system includes a condenser, a high-temperature heat pump throttle valve, an evaporator and a high-temperature heat pump compressor connected through a high-temperature refrigerant pipeline.

3. The rotary dehumidification system according to claim 1, characterized in that, It also includes cooling water piping that passes through a water-cooled heat exchanger for cooling the water-cooled heat exchanger.

4. The rotary dehumidification system according to claim 1, characterized in that, It also includes an air cooler, and the generator steam outlet, preheater and air cooler of the generator are connected in sequence through steam pipelines.

5. The rotary dehumidification system according to claim 4, characterized in that, It also includes cooling water pipelines, and the water-cooled heat exchanger and the air cooler are connected in parallel through the cooling water pipelines.

6. The rotary dehumidification system according to claim 1, characterized in that, The regeneration system includes a regeneration section consisting of a preheater, a solution heat exchanger, a condenser, an electric heater, a dehumidifying impeller, and an evaporator, arranged sequentially along the regeneration airflow direction.

7. The rotary dehumidification system according to claim 1, characterized in that, The regeneration system includes a regeneration section consisting of a preheater, a solution heat exchanger, a regeneration fan, a condenser, an electric heater, a dehumidifying impeller, and an evaporator, arranged sequentially along the regeneration airflow direction.

8. The rotary dehumidification system according to claim 1, characterized in that, Both the generator and the absorber are falling film absorbers.

9. The rotary dehumidification system according to claim 1, characterized in that, The evaporator is a finned tube heat exchanger.

10. The rotary dehumidification system according to claim 1, characterized in that, The solution heat exchanger and the preheater are integral finned tube heat exchangers.

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