Room dehumidification, product drying, hot water supply and fresh water preparation comprehensive utilization system based on solar energy and operation method
By integrating dehumidification, drying, hot water and fresh water production functional modules, using the photothermal response characteristics of the photosensitive hydrophilic gel layer, an efficient, low-consumption, multi-energy synergistic solar energy comprehensive utilization system is built, solving the problem of single function of solar energy technology in the existing technology, and achieving the effect of efficient utilization and multi-scene collaborative application.
Patent Information
- Application Number
- CN202510548893.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-06-10
AI Technical Summary
In the prior art, solar energy technology is mostly limited to a single function, resulting in low energy utilization efficiency, high equipment redundancy, and high operating costs, making it difficult to meet the needs of collaborative applications in multiple scenarios.
By integrating four functional modules for dehumidification, drying, hot water and fresh water, the photothermal response characteristics of the photosensitive hydrophilic gel layer are used to integrate moisture absorption, steam generation, and material regeneration into the rotary wheel structure to realize hygroscopic and desorption synchronous cycles, and build a highly efficient, low-consumption, multi-energy-coordinated solar energy comprehensive utilization system.
It improves solar energy utilization efficiency, avoids equipment redundancy problems, reduces operating costs to a certain extent, realizes the demand for collaborative applications in multiple scenarios, and achieves zero wastewater discharge and improves freshwater recovery.
Smart Images
Figure CN120120657A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of comprehensive energy storage applications, and particularly to a comprehensive utilization system and operation method for room dehumidification, product drying, hot water supply, and fresh water production based on solar energy. Background Art
[0002] With the increasingly severe global energy crisis and environmental pollution problems, the continuous rise in carbon emissions has led to frequent extreme climates and the degradation of the ecosystem. The traditional energy model has been difficult to support the sustainable development needs. As a clean and sustainable energy source, solar energy shows great potential in the field of building environment regulation and comprehensive resource utilization due to its natural attributes of zero carbon emissions, renewable, and distributed utilization. However, in the existing technology, solar energy technologies are mostly limited to single functions. For example, an independent solar water heater can only provide domestic hot water, while dehumidifiers and drying equipment require additional power consumption; air water intake or seawater desalination devices rely on high-grade heat energy, resulting in complex systems and high costs. This indicates that traditional technologies have problems such as low energy utilization efficiency, high equipment redundancy, and high operating costs, and it is difficult to meet the requirements of multi-scenario collaborative applications. Summary of the Invention
[0003] In view of the above problems, the present invention proposes a comprehensive utilization system for room dehumidification, product drying, hot water supply, and fresh water production based on solar energy by integrating four functional modules of dehumidification, drying, hot water, and fresh water production. In this system, the photothermal response characteristics of the photosensitive hydrophilic gel layer are utilized to integrate moisture absorption, steam generation, and material regeneration in the rotating wheel structure, realizing the synchronous cycle of moisture absorption and desorption. The aim is to construct an efficient, low-consumption, and multi-energy collaborative solar energy comprehensive utilization system through multi-process coupling and energy cascade utilization, achieving the efficient conversion of solar energy resources and multi-objective collaborative optimization, and providing an innovative solution for building energy conservation and resource recycling.
[0004] To achieve the above technical features, the object of the present invention is realized as follows: A comprehensive utilization system for room dehumidification, product drying, hot water supply, and fresh water production based on solar energy, comprising a room dehumidification module for dehumidifying the interior of a room; The room dehumidification module includes a first circulation fan and a rotary coated adsorption heat exchanger; The rotary coated adsorption heat exchanger is connected to a product drying module for drying products; The rotary coated adsorption heat exchanger is connected to a hot water supply module for supplying hot water; The product drying module and the hot water supply module are simultaneously connected to a fresh water production module for producing fresh water.
[0005] Preferably, the room dehumidification module includes a first circulation fan disposed indoors, and the first circulation fan is connected to a rotary coated adsorption heat exchanger; wherein, indoor air is sent into the indoor environment dehumidification section of the rotary coated adsorption heat exchanger through the air circulation dehumidification return air inlet under the action of the first circulation fan, and the water vapor in the air is absorbed by the regenerated photosensitive hydrophilic gel layer on the blades in the rotary coated adsorption heat exchanger, the relative humidity of the air decreases, and then it is sent back into the room through the air circulation dehumidification supply air outlet to complete one cycle of dehumidification of the indoor environment.
[0006] Preferably, the rotary coated adsorption heat exchanger includes a rotating shaft, blades are arranged on the rotating shaft, and a glass cover is arranged at the end of the blades; fins are arranged on the blades, and a light-absorbing coating and a photosensitive hydrophilic gel layer are respectively attached to the two outer surfaces of the blades and the fins; The rotary coated adsorption heat exchanger is divided into three main sections by the glass cover: a regeneration section, an indoor environment dehumidification section, and a drying and dehumidification section.
[0007] Preferably, in the regeneration section: the light-absorbing coating on the fins absorbs solar energy through the action of condensing light, and uses its high thermal conductivity of the metal to quickly transfer the heat to the photosensitive hydrophilic gel layer, promoting the gel to heat up. Under the synergistic action of photocatalytic and endothermic heating, the photosensitive hydrophilic gel layer quickly releases the adsorbed water, completing the regeneration of the photosensitive hydrophilic gel layer; In the indoor environment dehumidification section: the fins are in contact with the indoor air, enabling the indoor humid air to uniformly pass through the surface of the regenerated photosensitive hydrophilic gel layer. After the humid air is strongly adsorbed and dehumidified by the regenerated photosensitive hydrophilic gel layer, the indoor air is efficiently converted into a low-humidity state. The indoor environment dehumidification section and the solar-driven regeneration section form a closed loop, realizing the reciprocating cycle of dehumidification and regeneration during the rotation of the rotary coated adsorption heat exchanger; In the drying and dehumidification section: a heat and moisture transfer channel is formed between the high-temperature and high-humidity air after drying and dehumidifying the product and the regenerated photosensitive hydrophilic gel layer on the fins. The humid air is cooled down, and the regenerated photosensitive hydrophilic gel layer with strong water absorption capacity quickly converts the high-temperature and high-humidity air into a low-temperature and low-humidity state, thereby realizing a large reduction in temperature and humidity of the humid air and restoring it to low-temperature and low-humidity air that can be dried and dehumidified again and entering the next cycle.
[0008] Preferably, the product drying module includes a rotary coated adsorption heat exchanger, a medium-temperature condensate heat exchanger, a low-temperature condensate heat exchanger, a second circulation fan, a direct-injection vacuum tube solar collector, and a drying oven; The low-temperature condensate heat exchanger's low-temperature side inlet is connected to the outlet of the drying and dehumidifying section of the rotary coated adsorption heat exchanger. The low-temperature side outlet of the low-temperature condensate heat exchanger is connected to the second circulation fan. Under the action of the second circulation fan, the air at the low-temperature side outlet enters the inlet of the direct-injection vacuum tube solar collector. The outlet of the direct-injection vacuum tube solar collector is divided into branch one and branch two. Among them, branch one is connected to the inlet of the drying oven, and the outlet of the drying oven is connected to the inlet of the drying and dehumidifying section of the rotary coated adsorption heat exchanger. Branch two is connected to the inlet of the regeneration section of the rotary coated adsorption heat exchanger. The outlet of the regeneration section of the rotary coated adsorption heat exchanger is connected to the high-temperature side inlet of the medium-temperature condensate heat exchanger. The high-temperature side outlet of the medium-temperature condensate heat exchanger is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger. The high-temperature side outlet of the low-temperature condensate heat exchanger is directly discharged into the environment or mixed with the low-temperature and low-humidity air at the low-temperature side outlet of the low-temperature condensate heat exchanger and then enters the next cycle.
[0009] Preferably, the hot water supply module includes a rotary coated adsorption heat exchanger, a medium-temperature condensate heat exchanger, a low-temperature condensate heat exchanger, a second circulation fan, and a direct-injection vacuum tube solar collector. Branch two of the outlet of the direct-injection vacuum tube solar collector is connected to the inlet of the regeneration section of the rotary coated adsorption heat exchanger to ensure that the high-temperature and low-humidity air leaving the direct-injection vacuum tube solar collector enters the rotary coated adsorption heat exchanger to complete the regeneration of the photosensitive hydrophilic gel layer adsorption function. The outlet of the regeneration section of the rotary coated adsorption heat exchanger is connected to the high-temperature side inlet of the medium-temperature condensate heat exchanger. The high-temperature side outlet of the medium-temperature condensate heat exchanger is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger. The low-temperature side outlet of the low-temperature condensate heat exchanger is connected to its high-temperature side outlet and then enters the second circulation fan. Under the action of the second circulation fan, the low-temperature and low-humidity air after condensate dehumidification enters the direct-injection vacuum tube solar collector to complete a cycle. The low-temperature side inlet of the medium-temperature condensate heat exchanger is connected to the tap water pipeline, and the low-temperature side outlet of the medium-temperature condensate heat exchanger directly provides domestic hot water for users.
[0010] Preferably, the fresh water production module includes a medium-temperature condensate heat exchanger, a low-temperature condensate heat exchanger, a first steam separator, a second steam separator, a filter, and a circulation water pump. The high-temperature side outlet of the medium-temperature condensate heat exchanger is connected to the inlet of the first steam-water separator, and the high-temperature side outlet of the low-temperature condensate heat exchanger is connected to the inlet of the second steam-water separator; the liquid outlets of the first steam-water separator and the second steam-water separator after separation are connected and then connected to a filter, and then sent out by a circulating water pump for use as fresh water; the medium-temperature saturated wet air outlet after separation by the second steam-water separator is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger to promote it to enter the low-temperature condensate heat exchanger for further condensation, cooling and dehumidification. The second steam-water separator separates the low-temperature saturated wet air and condensate after the condensation, cooling and dehumidification. The separated low-temperature saturated wet air outlet is merged with the low-temperature side outlet of the low-temperature condensate heat exchanger to mix the low-temperature saturated wet air and the low-temperature low-humidity air into low-temperature wet air with extremely low relative humidity. Finally, the mixed outlet is connected to the second circulating fan to enter the next cycle.
[0011] On the other hand, the present invention provides an operation method for a comprehensive utilization system of solar-based room dehumidification, product drying, hot water supply and fresh water production. The operation method is implemented by using the comprehensive utilization system of solar-based room dehumidification, product drying, hot water supply and fresh water production, and includes: Domestic hot water supply: In the regeneration section of the rotary coated adsorption heat exchanger under light conditions, through the light concentration effect of the glass cover of the rotary coated adsorption heat exchanger, light is concentrated on the light-absorbing coating on its blades and fins. The light-absorbing coating absorbs light energy and performs photothermal conversion, transferring the heat energy to the photosensitive hydrophilic gel layer on the surface. Under the coordinated action of light catalysis and endothermic temperature rise of the photosensitive hydrophilic gel layer, the temperature rises rapidly, and high-temperature water vapor at 100-120 °C is quickly released. These high-temperature water vapors enter the high-temperature side inlet of the medium-temperature condensate heat exchanger and exchange heat with the tap water entering the low-temperature side inlet of the medium-temperature condensate heat exchanger. The tap water absorbs the heat of the high-temperature steam and the temperature rises, thereby obtaining domestic hot water for use; Room circulating dehumidification: In the regeneration section of the rotary coated adsorption heat exchanger, the photosensitive hydrophilic gel layer absorbs heat and releases all the moisture absorbed during the dehumidification process as water vapor, which then mixes into the high-temperature and low-humidity air from the direct-injection vacuum tube solar collector and is carried away. The photosensitive hydrophilic gel layer in the regeneration section of the rotary coated adsorption heat exchanger completes adsorption regeneration and has strong water absorption. Driven by the rotating shaft, these photosensitive hydrophilic gel layer blades with strong water absorption rotate to the indoor environment dehumidification section. The indoor environment dehumidification section of the rotary coated adsorption heat exchanger is connected to the air circulation dehumidification return air inlet. Under the action of the first circulation fan, it ensures that the indoor air circulates continuously through the indoor environment dehumidification section of the rotary coated adsorption heat exchanger during rotation for dehumidification. When the room air is sent into the indoor environment dehumidification section of the rotary coated adsorption heat exchanger through the air circulation dehumidification return air inlet under the action of the first circulation fan, the water vapor in the air is absorbed by the photosensitive hydrophilic gel layer regenerated by the blades in the rotary coated adsorption heat exchanger, reducing the relative humidity of the air to at least 30%. Subsequently, it is sent back into the room through the air circulation dehumidification supply air outlet to complete one cycle of dehumidification of the indoor environment. Product drying: After heat exchange is completed in the medium-temperature condensate heat exchanger, the saturated humid air discharged has a temperature between 80 - 90 °C. This saturated humid air then enters the high-temperature side of the low-temperature condensate heat exchanger. In the low-temperature condensate heat exchanger, the low-temperature and low-humidity air at the outlet of the drying and dehumidification section of the rotary coated adsorption heat exchanger absorbs the heat of the 80 - 90 °C saturated humid air coming in from the medium-temperature condensate heat exchanger, raising the temperature to 50 - 60 °C, and at the same time, the relative humidity further drops to 15 - 20%. There are two ways to handle the air at the outlet of the high-temperature side of the low-temperature condensate heat exchanger: One way is to directly discharge it into the environment. This way can make the drying box of the system in a negative pressure state, thus improving the drying efficiency. Another way is to mix it with the low-temperature and low-humidity air at the outlet of the low-temperature side of the low-temperature condensate heat exchanger and then enter the next cycle. Under the action of the second circulation fan, they are sent into the direct-injection vacuum tube solar collector together. The direct-injection vacuum tube solar collector converts solar radiant energy into heat energy and further heats the humid air with a temperature of 50 - 60 °C and a relative humidity of 15% - 20% entering it, raising the temperature to 90 - 100 °C and the relative humidity continuing to drop to 10%. At this time, the high-temperature and low-humidity air has good drying ability, and a part of the air is sent into the drying box for high-temperature drying treatment of the product. Freshwater preparation: The temperature of the wet air coming out of the drying oven is 60 - 70°C, and the relative humidity reaches 80 - 100%. This part of the wet air enters the drying and dehumidifying section of the rotary coated adsorption heat exchanger. After regeneration and rotation to the strongly adsorbent photosensitive hydrophilic gel layer in the drying and dehumidifying section, it absorbs the moisture in the incoming wet air to dry and dehumidify it. The moisture content drops sharply, the relative humidity drops to 30%, and the temperature drops to 40 - 50°C. Subsequently, it is introduced into the medium-temperature condensate heat exchanger to participate in the next cycle. Another part of the wet air coming out of the direct-injection vacuum tube solar collector is sent to the regeneration section of the rotary coated adsorption heat exchanger. This part of the wet air takes away the water vapor with a temperature of 100 - 120°C that overflows rapidly from the photosensitive hydrophilic gel layer under the synergistic action of photocatalytic and endothermic heating, enabling the photosensitive hydrophilic gel layer to complete regeneration. In addition, the water condensed during the condensation of high-temperature and high-humidity air in the medium-temperature condensate heat exchanger and the low-temperature condensate heat exchanger is separated by the first steam-water separator and the second steam-water separator respectively, filtered through filters, and then sent out by the circulating water pump for use as fresh water.
[0012] The present invention has the following beneficial effects: 1. The present invention integrates the four functional modules of dehumidification, drying, hot water production, and fresh water production, improving the solar energy utilization efficiency, avoiding equipment redundancy problems, reducing the operating cost to a certain extent, and greatly meeting the requirements of multi-scenario collaborative applications.
[0013] 2. The present invention utilizes a runner structure to enable the material to achieve a dynamic cycle of moisture absorption and photothermal regeneration under solar irradiation, eliminating the independent regeneration heating module in the traditional dehumidification system and reducing the equipment volume.
[0014] 3. All the dehumidification condensate water, the heat recovery of the hot and humid tail gas from drying, and the condensate water of the photothermal regeneration steam in the present invention are converted into fresh water, which can achieve zero wastewater discharge and improve the fresh water recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further described below in conjunction with the drawings and embodiments.
[0016] Figure 1 It is the schematic diagram of the comprehensive utilization system for room dehumidification, product drying, hot water supply, and fresh water production based on solar energy of the present invention, and the state diagram of the direct discharge of the high-temperature side outlet of the low-temperature condensate heat exchanger into the environment.
[0017] Figure 2 It is the schematic diagram of the comprehensive utilization system for room dehumidification, product drying, hot water supply, and fresh water production based on solar energy of the present invention, and the state diagram of the mixing of the low-temperature and low-humidity air at the high-temperature side outlet and the low-temperature side outlet of the low-temperature condensate heat exchanger.
[0018] Figure 3 It is the structural diagram of the rotary coated adsorption heat exchanger of the present invention.
[0019] Figure 4 For the present invention Figure 3 in the partial enlarged view.
[0020] Figure 5 is the structural principle of the first spiral tube condensate heat exchanger of the present invention.
[0021] Figure 6 is the structural principle of the second spiral tube condensate heat exchanger of the present invention.
[0022] In the figure: 1 Rotary coating adsorption heat exchanger, 2 Medium-temperature condensate heat exchanger, 3 Low-temperature condensate heat exchanger, 4 Second circulation fan, 5 Direct-injection vacuum tube solar collector, 6 Drying oven, 7 First circulation fan, 8 Filter, 9 Circulation water pump, 10 First steam-water separator, 11 Second steam-water separator; 12 Indoor environment dehumidification section, 13 Drying and dehumidification section, 14 Glass cover, 15 Absorbing coating, 16 Photosensitive hydrophilic gel layer, 17 Fins, 18 Blades, 19 Regeneration section. Specific embodiments
[0023] The following further describes the embodiments of the present invention with reference to the accompanying drawings.
[0024] Example 1: Refer to Figures 1-6 , to solve the problems of single function, low energy efficiency, equipment redundancy and insufficient resource recovery rate in the existing solar energy utilization technology, the present invention provides a comprehensive utilization system for room dehumidification, product drying, hot water supply and fresh water production based on solar energy. Through photothermal conversion, cascade utilization of waste heat and dynamic adsorption regeneration technology, the present invention integrates the multi-scenario requirements driven by solar energy into an energy closed-loop for coordinated operation, while reducing the comprehensive energy consumption, realizing the circular regeneration of fresh water resources. The system takes the rotary coating adsorption heat exchanger as the core, innovatively couples the photothermal response characteristics of the photosensitive hydrophilic gel layer with the multi-stage waste heat recovery architecture, improves the comprehensive utilization rate of solar energy, and reduces the energy consumption compared with traditional split equipment. Its energy-saving and environmental protection characteristics are remarkable, providing a solution for integrated clean energy.
[0025] A comprehensive utilization system for room dehumidification, product drying, hot water supply and fresh water production based on solar energy, comprising a room dehumidification module for dehumidifying the interior of the room; the room dehumidification module includes a first circulation fan 7 and a rotary coating adsorption heat exchanger 1; the rotary coating adsorption heat exchanger 1 is connected to a product drying module for drying products; the rotary coating adsorption heat exchanger 1 is connected to a hot water supply module for supplying hot water; the product drying module and the hot water supply module are simultaneously connected to a fresh water production module for preparing fresh water.
[0026] Further, the room dehumidification module includes a first circulation fan 7 disposed indoors, and the first circulation fan 7 is connected to the rotary coated adsorption heat exchanger 1; wherein, indoor air is sent into the indoor environment dehumidification section 12 of the rotary coated adsorption heat exchanger 1 through the air circulation dehumidification return air inlet under the action of the first circulation fan 7, and the water vapor in the air is absorbed by the regenerated photosensitive hydrophilic gel layer 16 on the blades in the rotary coated adsorption heat exchanger 1, the relative humidity of the air decreases, and then it is sent back into the room through the air circulation dehumidification supply air outlet to complete one cycle of dehumidification of the indoor air.
[0027] Through the above room dehumidification module, the photosensitive hydrophilic gel layer in the regeneration section of the rotary coated adsorption heat exchanger absorbs heat and releases all the water adsorbed during the dehumidification process into water vapor, which is incorporated into the high-temperature and low-humidity air from the direct-injection vacuum tube solar collector and taken away. The photosensitive hydrophilic gel layer in the regeneration section of the rotary coated adsorption heat exchanger completes adsorption regeneration and has strong water absorption. Driven by the rotating shaft, the blades of these photosensitive hydrophilic gel layers with strong water absorption rotate to the indoor environment dehumidification section. The indoor environment dehumidification section of the rotary coated adsorption heat exchanger is connected to the air circulation dehumidification return air inlet. Under the action of the first circulation fan, it ensures that the indoor air circulates through the indoor environment dehumidification section of the rotary coated adsorption heat exchanger for continuous dehumidification, reducing the relative humidity of the air in the room to about 30%.
[0028] The specific working principle of the room dehumidification module is as follows: when the room air is sent into the indoor environment dehumidification section of the rotary coated adsorption heat exchanger through the air circulation dehumidification return air inlet under the action of the first circulation fan, the water vapor in the air is absorbed by the regenerated photosensitive hydrophilic gel layer on the blades in the rotary coated adsorption heat exchanger, reducing the relative humidity of the air to about 30%. Then, it is sent back into the room through the air circulation dehumidification supply air outlet to complete one cycle of dehumidification of the indoor air.
[0029] Further, the rotary coated adsorption heat exchanger 1 includes a rotating shaft, on which blades 18 are provided, and a glass cover 14 is provided at the end of the blades 18; fins 17 are provided on the blades 18, and light-absorbing coatings 15 and photosensitive hydrophilic gel layers 16 are respectively attached to the two outer surfaces of the blades 18 and the fins 17; the rotary coated adsorption heat exchanger 1 is divided into three main sections by the glass cover 14: a regeneration section 19, an indoor environment dehumidification section 12, and a drying dehumidification section 13.
[0030] Among them, in the regeneration section 19: the light-absorbing coating 5 on the fins 17 absorbs solar energy through the concentrating effect, and quickly transfers the heat to the photosensitive hydrophilic gel layer 16 by using the high thermal conductivity of the metal, promoting the gel to heat up. Under the synergistic action of photocatalytic and heat absorption heating, the photosensitive hydrophilic gel layer 16 quickly releases the adsorbed water, completing the regeneration of the photosensitive hydrophilic gel layer 16; In the indoor environment dehumidification section 12: The fin 17 is in contact with the air in the room, enabling the wet air in the room to uniformly pass through the surface of the regenerated photosensitive hydrophilic gel layer 16. After the wet air is strongly adsorbed and dehumidified by the regenerated photosensitive hydrophilic gel layer 16, the indoor air is efficiently converted into a low-humidity state. The indoor environment dehumidification section 12 and the solar-driven regeneration section 19 form a closed loop, and the dehumidification and regeneration reciprocating cycles are realized during the rotation of the rotary coating adsorption heat exchanger 1; In the drying and dehumidification section 13: A heat and moisture transfer channel is formed between the high-temperature and high-humidity air after drying and dehumidifying the product and the regenerated photosensitive hydrophilic gel layer 16 on the fin 17. The wet air is cooled down, and the regenerated photosensitive hydrophilic gel layer 16 with strong water absorption capacity quickly converts the high-temperature and high-humidity air into a low-temperature and low-humidity state, thereby realizing a significant reduction in temperature and humidity of the wet air and restoring it to low-temperature and low-humidity air that can be dried and dehumidified again and entering the next cycle.
[0031] Furthermore, the product drying module includes a rotary coating adsorption heat exchanger 1, a medium-temperature condensate heat exchanger 2, a low-temperature condensate heat exchanger 3, a second circulation fan 4, a direct-injection vacuum tube solar collector 5, and a drying oven 6; The low-temperature side inlet of the low-temperature condensate heat exchanger 3 is connected to the outlet of the drying and dehumidification section 13 of the rotary coating adsorption heat exchanger 1, and the low-temperature side outlet of the low-temperature condensate heat exchanger 3 is connected to the second circulation fan 4. Under the action of the second circulation fan 4, the air at the low-temperature side outlet enters the inlet of the direct-injection vacuum tube solar collector 5. The outlet of the direct-injection vacuum tube solar collector 5 is divided into branch one and branch two; Among them, branch one is connected to the inlet of the drying oven 6, and the outlet of the drying oven 6 is connected to the inlet of the drying and dehumidification section 13 of the rotary coating adsorption heat exchanger 1; Branch two is connected to the inlet of the regeneration section 19 of the rotary coating adsorption heat exchanger 1, and the outlet of the regeneration section 19 of the rotary coating adsorption heat exchanger 1 is connected to the high-temperature side inlet of the medium-temperature condensate heat exchanger 2. The high-temperature side outlet of the medium-temperature condensate heat exchanger 2 is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger 3; The high-temperature side outlet of the low-temperature condensate heat exchanger 3 is directly discharged into the environment or mixed with the low-temperature and low-humidity air at the low-temperature side outlet of the low-temperature condensate heat exchanger 3 and enters the next cycle.
[0032] Among them, in the product drying module, after heat exchange is completed in the medium-temperature condensate heat exchanger, the temperature of the discharged saturated humid air is between 80 and 90 °C. These saturated humid air then enter the high-temperature side of the low-temperature condensate heat exchanger. In the low-temperature condensate heat exchanger, the low-temperature and low-humidity air at the outlet of the rotary coating adsorption heat exchanger drying and dehumidifying section will absorb the heat of the 80-90 °C saturated humid air entering from the medium-temperature condensate heat exchanger, and the temperature will rise to 50-60 °C. At the same time, the relative humidity further drops to 15-20%. Then it leaves from the outlet of the low-temperature side of the low-temperature condensate heat exchanger and enters the direct-injection vacuum tube solar collector under the action of the second circulation fan. The direct-injection vacuum tube solar collector converts solar radiant energy into heat energy, further heats the humid air with a temperature of about 50-60 °C and a relative humidity of 15-20% entering it, and the temperature rises to 90-100 °C, and the relative humidity continues to drop to about 10%. At this time, the high-temperature and low-humidity air has good drying ability. Part of the air is sent into the drying oven for high-temperature drying treatment of the product; the other part is sent into the regeneration section of the rotary coating adsorption heat exchanger to take away the water vapor overflowing rapidly released by the photosensitive hydrophilic gel layer under the synergistic action of photocatalytic and endothermic temperature rise, so that the photosensitive hydrophilic gel layer is regenerated. The temperature of the humid air after the product is dried in the drying oven is about 60-70 °C, and the relative humidity can reach 80-100%. Then it enters the drying and dehumidifying section of the rotary coating adsorption heat exchanger. After regeneration and rotation to the strongly adsorptive photosensitive hydrophilic gel layer in the drying and dehumidifying section, it absorbs the moisture in the entering humid air to dry and dehumidify it. The moisture content drops sharply, the relative humidity drops to about 30%, and the temperature drops to 40-50 °C, and then enters the low-temperature condensate heat exchanger for repeated circulation. There are two treatment methods for the air at the high-temperature side outlet of the low-temperature condensate heat exchanger: one method is to directly discharge it into the environment. This method can make the drying oven of the system in a negative pressure state, thereby improving the drying efficiency; the other method is to mix it with the low-temperature and low-humidity air at the low-temperature side outlet of the low-temperature condensate heat exchanger and enter the next cycle.
[0033] Furthermore, the hot water supply module includes a rotary coated adsorption heat exchanger 1, a medium-temperature condensate heat exchanger 2, a low-temperature condensate heat exchanger 3, a second circulation fan 4, and a direct-injection vacuum tube solar collector 5. The second outlet branch of the direct-injection vacuum tube solar collector 5 is connected to the inlet of the regeneration section of the rotary coated adsorption heat exchanger 1, ensuring that the high-temperature and low-humidity air leaving the direct-injection vacuum tube solar collector 5 enters the rotary coated adsorption heat exchanger 1 to complete the regeneration of the adsorption function of the photosensitive hydrophilic gel layer 16. The outlet of the regeneration section 19 of the rotary coated adsorption heat exchanger 1 is connected to the inlet of the high-temperature side of the medium-temperature condensate heat exchanger 2. The outlet of the high-temperature side of the medium-temperature condensate heat exchanger 2 is connected to the inlet of the high-temperature side of the low-temperature condensate heat exchanger 3. The outlet of the low-temperature side of the low-temperature condensate heat exchanger 3 is connected to its high-temperature side outlet and then enters the second circulation fan 4. Under the action of the second circulation fan 4, the low-temperature and low-humidity air after condensate dehumidification enters the direct-injection vacuum tube solar collector 5 to complete a cycle. The inlet of the low-temperature side of the medium-temperature condensate heat exchanger 2 is connected to the tap water pipeline, and the outlet of the low-temperature side of the medium-temperature condensate heat exchanger 2 directly provides domestic hot water for users.
[0034] Among them, in the hot water supply module, under light conditions in the regeneration section of the rotary coated adsorption heat exchanger, through the condensing action of the glass cover of the rotary coated adsorption heat exchanger, the light is concentrated on the light-absorbing coating on its blades. The light-absorbing coating absorbs the light energy and performs photothermal conversion, transferring the heat energy to the photosensitive hydrophilic gel layer on the surface. Under the synergistic action of light catalysis and endothermic temperature rise of the photosensitive hydrophilic gel layer, the temperature rises rapidly, and high-temperature water vapor at 100 - 120 °C is quickly released. This water vapor enters the inlet of the high-temperature side of the medium-temperature condensate heat exchanger and exchanges heat with the tap water at the inlet of the low-temperature side of the medium-temperature condensate heat exchanger. The tap water absorbs the heat of the high-temperature steam and the temperature rises, thus obtaining domestic hot water for use. The second outlet branch of the direct-injection vacuum tube solar collector is connected to the regeneration section of the rotary coated adsorption heat exchanger, ensuring that the high-temperature and low-humidity air leaving the direct-injection vacuum tube solar collector enters the rotary coated adsorption heat exchanger to complete the regeneration of the coating adsorption function in the rotary coated adsorption heat exchanger. After the air on the high-temperature side of the medium-temperature condensate heat exchanger exchanges heat with the tap water, it enters the inlet of the high-temperature side of the low-temperature condensate heat exchanger. The air at the outlet of the low-temperature side of the low-temperature condensate heat exchanger enters the direct-injection vacuum tube solar collector under the action of the second circulation fan to complete a cycle.
[0035] Furthermore, the fresh water production module includes a medium-temperature condensate heat exchanger 2, a low-temperature condensate heat exchanger 3, a first steam-water separator 10, a second steam-water separator 11, a filter 8, and a circulation water pump 9; the high-temperature side outlet of the medium-temperature condensate heat exchanger 2 is connected to the inlet of the first steam-water separator 10, and the high-temperature side outlet of the low-temperature condensate heat exchanger 3 is connected to the inlet of the second steam-water separator 11; the liquid outlets after separation of the first steam-water separator 10 and the second steam-water separator 11 are connected and accessed to the filter 8, and then sent out by the circulation water pump 9 for use as fresh water; the medium-temperature saturated wet air outlet after separation of the second steam-water separator 11 is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger 3 to promote it to enter the low-temperature condensate heat exchanger 3 for further condensation, cooling, and dehumidification. The second steam-water separator separates the low-temperature saturated wet air and condensate after the condensation, cooling, and dehumidification. The outlet of the separated low-temperature saturated wet air is merged with the low-temperature side outlet of the low-temperature condensate heat exchanger 3 to mix the low-temperature saturated wet air and the low-temperature low-humidity air therein into low-temperature wet air with extremely low relative humidity. Finally, the mixed outlet is connected to the second circulation fan 4 to enter the next cycle.
[0036] Among them, in the fresh water production module, after the high-temperature steam in the medium-temperature condensate heat exchanger exchanges heat with tap water, wet air at 80 - 90 °C is discharged into the first steam-water separator. The medium-temperature saturated wet air outlet after separation in the first steam-water separator is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger to promote it to enter the low-temperature condensate heat exchanger for further condensation, cooling, and dehumidification. The second steam-water separator separates the low-temperature saturated wet air and condensate after the condensation, cooling, and dehumidification. The outlet of the separated low-temperature saturated wet air is merged with the low-temperature side outlet of the low-temperature condensate heat exchanger to mix the low-temperature saturated wet air and the low-temperature low-humidity air therein into low-temperature wet air with extremely low relative humidity. Finally, the mixed outlet is connected to the second circulation fan to enter the next cycle. The water condensed during the condensation of high-temperature and humid air in the medium-temperature condensate heat exchanger and the low-temperature condensate heat exchanger is separated by the steam-water separator, simply filtered by the filter, and then sent out by the circulation water pump for use as fresh water.
[0037] Embodiment 2: The present invention provides an operation method for a comprehensive utilization system of room dehumidification, product drying, hot water supply, and fresh water production based on solar energy. The operation method is implemented by using the comprehensive utilization system of room dehumidification, product drying, hot water supply, and fresh water production based on solar energy, and includes: Domestic hot water supply: Under light conditions in the regeneration section of the rotary coated adsorption heat exchanger 1, through the condensing effect of the glass cover of the rotary coated adsorption heat exchanger 1, light is concentrated on the light-absorbing coatings on its blades and fins. The light-absorbing coatings absorb light energy and perform photo-thermal conversion, transferring the heat energy to the photosensitive hydrophilic gel layer on the surface. Under the coordinated action of light catalysis and heat absorption for temperature rise, the temperature of the photosensitive hydrophilic gel layer rises rapidly, and high-temperature water vapor at 100 - 120 °C is quickly released. These high-temperature water vapors enter the high-temperature side inlet of the medium-temperature condensate heat exchanger 2 and exchange heat with the tap water entering the low-temperature side inlet of the medium-temperature condensate heat exchanger 2. The tap water absorbs the heat of the high-temperature steam and its temperature rises, thus obtaining domestic hot water for use; Room cycle dehumidification: The photosensitive hydrophilic gel layer in the regeneration section of the rotary coated adsorption heat exchanger 1 absorbs heat and releases all the moisture in the dehumidification process, turning it into water vapor and integrating it into the high-temperature and low-humidity air from the direct injection vacuum tube collector 5 and being carried away. The photosensitive hydrophilic gel layer in the regeneration section of the rotary coated adsorption heat exchanger 1 completes adsorption regeneration and has strong water absorption. Driven by the rotating shaft, these photosensitive hydrophilic gel layer blades with strong water absorption rotate to the indoor environment dehumidification section. The indoor environment dehumidification section of the rotary coated adsorption heat exchanger 1 is connected to the air circulation dehumidification return air inlet. Under the action of the first circulation fan 7, it ensures that indoor air circulates continuously through the indoor environment dehumidification section of the rotary coated adsorption heat exchanger 1 during rotation; when the room air is sent into the indoor environment dehumidification section of the rotary coated adsorption heat exchanger 1 through the air circulation dehumidification return air inlet under the action of the first circulation fan 7, the water vapor in the air is absorbed by the photosensitive hydrophilic gel layer regenerated by the blades in the rotary coated adsorption heat exchanger, reducing the relative humidity of the air to at least 30%. Subsequently, it is sent back into the room through the air circulation dehumidification supply air outlet to complete one cycle of dehumidification of the indoor environment; Product drying: After the medium-temperature condensate heat exchanger 2 completes heat exchange, the exhausted saturated wet air has a temperature between 80 - 90 °C. These saturated wet air then enter the high-temperature side of the low-temperature condensate heat exchanger 3. In the low-temperature condensate heat exchanger 3, the low-temperature and low-humidity air at the outlet of the drying and dehumidifying section of the rotary coated adsorption heat exchanger 1 will absorb the heat of the 80 - 90 °C saturated wet air coming in from the medium-temperature condensate heat exchanger, and the temperature will rise to 50 - 60 °C. At the same time, the relative humidity will further drop to 15 - 20%. There are two ways to handle the air at the outlet of the high-temperature side of the low-temperature condensate heat exchanger 3: One way is to directly discharge it into the environment. This way can make the drying oven of the system in a negative pressure state, thus improving the drying efficiency; Another way is to mix it with the low-temperature and low-humidity air at the outlet of the low-temperature side of the low-temperature condensate heat exchanger 3 and then enter the next cycle; Under the action of the second circulation fan 4, they are sent into the direct-injection vacuum tube solar collector 5 together. The direct-injection vacuum tube solar collector 5 converts solar radiant energy into heat energy, and further heats the wet air with a temperature of 50 - 60 °C and a relative humidity of 15% - 20% entering it, and the temperature rises to 90 - 100 °C, and the relative humidity continues to drop to 10%. At this time, the high-temperature and low-humidity air has good drying ability, and a part of the air is sent into the drying oven 6 for high-temperature drying treatment of the product; Fresh water preparation: The wet air coming out of the drying oven 6 has a temperature of 60 - 70 °C and a relative humidity of 80 - 100%. This part of the wet air enters the drying and dehumidifying section of the rotary coated adsorption heat exchanger 1. After regeneration and rotation to the strongly adsorptive photosensitive hydrophilic gel layer in the drying and dehumidifying section, it absorbs the moisture in the incoming wet air to dry and dehumidify it. The moisture content drops sharply, the relative humidity drops to 30%, and the temperature drops to 40 - 50 °C. Then it is sent into the medium-temperature condensate heat exchanger 2 to participate in the next cycle. Another part of the wet air coming out of the direct-injection vacuum tube solar collector 5 is sent into the regeneration section of the rotary coated adsorption heat exchanger 1. This part of the wet air takes away the water vapor with a temperature of 100 - 120 °C overflowing rapidly by the photosensitive hydrophilic gel layer under the synergistic action of photocatalytic and endothermic temperature rise, so that the photosensitive hydrophilic gel layer is regenerated; In addition, the water condensed during the condensation of high-temperature and high-humidity air by the medium-temperature condensate heat exchanger 2 and the low-temperature condensate heat exchanger 3 is separated by the first steam-water separator 10 and the second steam-water separator 11 respectively, filtered by the filter 8 and then sent out by the circulating water pump 9 for use as fresh water.
Claims
1. A solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system, characterized in that: including a room dehumidification module for dehumidifying the interior of the room; The room dehumidification module comprises a first circulation fan (7) and a rotary coating adsorption heat exchanger (1); The rotary coating adsorption heat exchanger (1) is connected to a product drying module for drying the product; The rotary coating adsorption heat exchanger (1) is connected to a hot water supply module for supplying hot water; The product drying module and the hot water supply module are simultaneously connected to a fresh water production module for preparing fresh water.
2. According to claim 1, a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system is characterized by: The room dehumidification module comprises a first circulation fan (7) arranged indoors, the first circulation fan (7) being connected to the rotary coated adsorption heat exchanger (1); wherein, under the action of the first circulation fan (7), indoor air is sent into the indoor environment dehumidification section (12) of the rotary coated adsorption heat exchanger (1) through the air circulation dehumidification return air inlet, water vapor in the air is absorbed by the regenerated photosensitive hydrophilic gel layer (16) on the blades inside the rotary coated adsorption heat exchanger (1), the relative humidity of the air decreases, and then the air is sent back into the room through the air circulation dehumidification supply air outlet to complete a cycle of dehumidification of the room.
3. According to claim 1, a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system is characterized by: The rotary coating adsorption heat exchanger (1) comprises a rotating shaft, on which a blade (18) is arranged, and at the end of the blade (18) a glass cover (14) is arranged; a fin (17) is arranged on the blade (18), and two outer surfaces of the blade (18) and the fin (17) are respectively attached with a light-absorbing coating (15) and a photosensitive hydrophilic gel layer (16); The rotary coating adsorption heat exchanger (1) is divided into three main sections by a glass cover (14): a regeneration section (19), an indoor environment dehumidification section (12) and a drying dehumidification section (13).
4. According to claim 3, a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system is characterized in that: In the regeneration section (19): the light-absorbing coating (5) on the fin (17) absorbs solar energy by concentrating light, and uses the high thermal conductivity of the metal to quickly transfer heat to the photosensitive hydrophilic gel layer (16), thereby causing the gel to heat up. Under the synergistic effect of light catalysis and heat absorption and temperature rise, the photosensitive hydrophilic gel layer (16) quickly releases the adsorbed water, thereby completing the regeneration of the photosensitive hydrophilic gel layer (16); In the indoor environment dehumidification section (12): the fins (17) are in contact with the air in the room, so that the wet air in the room evenly passes through the surface of the regenerated photosensitive hydrophilic gel layer (16). The wet air is strongly adsorbed and dehumidified by the regenerated photosensitive hydrophilic gel layer (16), and the indoor air is efficiently converted into a low-humidity state. The indoor environment dehumidification section (12) and the solar-driven regeneration section (19) form a closed loop, and a dehumidification and regeneration reciprocating cycle is realized during the rotation of the rotary coating adsorption heat exchanger (1); In the drying and dehumidification section (13), a heat and moisture transfer channel is formed between the high-temperature and high-humidity air after drying and dehumidifying the product and the regenerated photosensitive hydrophilic gel layer (16) on the fin (17), the humid air is cooled, and the regenerated photosensitive hydrophilic gel layer (16) with strong water absorption capacity quickly converts the high-temperature and high-humidity air into a low-temperature and low-humidity state, thereby achieving a significant cooling and dehumidification of the humid air and restoring it to low-temperature and low-humidity air that can be dried and dehumidified again and enter the next cycle.
5. According to claim 4, a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system is characterized by: The product drying module comprises a rotary coating adsorption heat exchanger (1), a medium-temperature condensate heat exchanger (2), a low-temperature condensate heat exchanger (3), a second circulation fan (4), a direct-injection vacuum tube collector (5) and a drying box (6); The low-temperature side inlet of the low-temperature condensate heat exchanger (3) is connected to the outlet of the drying and dehumidifying section (13) of the rotary coating adsorption heat exchanger (1), and the low-temperature side outlet of the low-temperature condensate heat exchanger (3) is connected to the second circulation fan (4). Under the action of the second circulation fan (4), the air at the low-temperature side outlet enters the inlet of the direct-injection vacuum tube collector (5), and the outlet of the direct-injection vacuum tube collector (5) is divided into branch one and branch two; wherein branch one is connected to the inlet of the drying box (6), and the outlet of the drying box (6) is connected to the outlet of the rotary coating adsorption heat exchanger (1). The inlet of the drying and dehumidifying section (13) is connected; the second branch is connected to the inlet of the regeneration section (19) of the rotary coating adsorption heat exchanger (1); the outlet of the regeneration section (19) of the rotary coating adsorption heat exchanger (1) is connected to the high-temperature side inlet of the medium-temperature condensate heat exchanger (2); the high-temperature side outlet of the medium-temperature condensate heat exchanger (2) is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger (3); the high-temperature side outlet of the low-temperature condensate heat exchanger (3) is directly discharged into the environment or mixed with the low-temperature and low-humidity air at the low-temperature side outlet of the low-temperature condensate heat exchanger (3) before entering the next cycle.
6. According to claim 5, a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system is characterized by: The hot water supply module comprises a rotary coating adsorption heat exchanger (1), a medium-temperature condensate heat exchanger (2), a low-temperature condensate heat exchanger (3), a second circulation fan (4), and a direct-injection vacuum tube collector (5); The outlet branch 2 of the direct-injection vacuum tube collector (5) is connected to the inlet of the regeneration section of the rotary coating adsorption heat exchanger (1), ensuring that the high-temperature and low-humidity air leaving the direct-injection vacuum tube collector (5) enters the rotary coating adsorption heat exchanger (1) to complete the regeneration of the adsorption function of the photosensitive hydrophilic gel layer (16); the outlet of the regeneration section (19) of the rotary coating adsorption heat exchanger (1) is connected to the high-temperature side inlet of the medium-temperature condensate heat exchanger (2), the high-temperature side outlet of the medium-temperature condensate heat exchanger (2) is connected to the high-temperature side inlet of the low-temperature condensate heat exchanger (3), the low-temperature side outlet of the low-temperature condensate heat exchanger (3) is connected to its high-temperature side outlet and then enters the second circulation fan (4), and the low-temperature and low-humidity air after condensation and dehumidification under the action of the second circulation fan (4) enters the direct-injection vacuum tube collector (5) to complete a cycle; the low-temperature side inlet of the medium-temperature condensate heat exchanger (2) is connected to the tap water pipeline, and the low-temperature side outlet of the medium-temperature condensate heat exchanger (2) directly provides domestic hot water for users.
7. According to claim 6, a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system is characterized by: The fresh water production module comprises a medium-temperature condensate heat exchanger (2), a low-temperature condensate heat exchanger (3), a first steam-water separator (10), a second steam-water separator (11), a filter (8) and a circulating water pump (9); The high temperature side outlet of the medium temperature condensing water heat exchanger (2) is connected to the inlet of the first steam-water separator (10), and the high temperature side outlet of the low temperature condensing water heat exchanger (3) is connected to the inlet of the second steam-water separator (11); the liquid outlets after separation of the first steam-water separator (10) and the second steam-water separator (11) are connected and connected to the filter (8), and then sent out through the circulating water pump (9) for use as fresh water; the medium temperature saturated humid air outlet after separation of the second steam-water separator (11) is connected to the high temperature side inlet of the low temperature condensing water heat exchanger (3), so that it enters the low temperature condensing water heat exchanger (3) for further condensation, cooling and dehumidification; the second steam-water separator (11) separates the low temperature saturated humid air and condensed water after condensation, cooling and dehumidification; the low temperature saturated humid air outlet after separation is combined with the low temperature side outlet of the low temperature condensing water heat exchanger (3) so that the low temperature saturated humid air and the low temperature low humidity air therein are mixed to become low temperature humid air with extremely low relative humidity; finally, the mixed outlet is connected to the second circulating fan (4) to enter the next circulation.
8. An operating method of a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system, characterized in that: The operation method is implemented by using a solar-based room dehumidification, product drying, hot water supply and fresh water production comprehensive utilization system as described in claim 7, comprising: Domestic hot water supply: In the regeneration section of the rotary coating adsorption heat exchanger (1), under light conditions, the glass cover of the rotary coating adsorption heat exchanger (1) focuses light on the light-absorbing coating on its blades and fins through the focusing effect. The light-absorbing coating absorbs light energy and performs light-heat conversion, transferring the heat energy to the photosensitive hydrophilic gel layer on the surface. Under the coordinated effect of light catalysis and heat absorption and temperature rise, the temperature of the photosensitive hydrophilic gel layer rises rapidly, and high-temperature water vapor of 100-120° C. is quickly released. The high-temperature water vapor enters the high-temperature side inlet of the medium-temperature condensing water heat exchanger (2), and exchanges heat with the tap water entering the low-temperature side inlet of the medium-temperature condensing water heat exchanger (2). The tap water absorbs the heat of the high-temperature steam and its temperature rises, thereby obtaining domestic hot water for use; Room cycle dehumidification: The photosensitive hydrophilic gel layer of the regeneration section of the rotary coating adsorption heat exchanger (1) absorbs heat and releases all the moisture in the dehumidification process into water vapor, which is then melted into the high-temperature, low-humidity air from the direct-injection vacuum tube collector (5) and taken away. The photosensitive hydrophilic gel layer of the regeneration section of the rotary coating adsorption heat exchanger (1) completes adsorption regeneration and has strong water absorption. Driven by the rotating shaft, these photosensitive hydrophilic gel layer blades with strong water absorption rotate to the indoor environment dehumidification section. The indoor environment dehumidification section of the rotary coating adsorption heat exchanger (1) is connected to the air circulation dehumidification return air inlet. In the first circulation fan (7) ensures that the indoor air circulates through the indoor environment dehumidification section of the rotary coated adsorption heat exchanger (1) for uninterrupted dehumidification during rotation; when the room air is sent into the indoor environment dehumidification section of the rotary coated adsorption heat exchanger (1) through the air circulation dehumidification return air inlet under the action of the first circulation fan (7), the water vapor in the air is absorbed by the photosensitive hydrophilic gel layer after the blades in the rotary coated adsorption heat exchanger are regenerated, so that the relative humidity of the air is reduced to at least 30%, and then the air is sent back to the room through the air circulation dehumidification supply air outlet to complete a cycle of dehumidification of the room; Product drying: After the medium-temperature condensate heat exchanger (2) completes the heat exchange, the temperature of the discharged saturated moist air is between 80-90°C. This saturated moist air then enters the high-temperature side of the low-temperature condensate heat exchanger (3). In the low-temperature condensate heat exchanger (3), the low-temperature and low-humidity air at the outlet of the drying and dehumidification section of the rotary coating adsorption heat exchanger (1) absorbs the heat of the 80-90°C saturated moist air coming from the medium-temperature condensate heat exchanger, and the temperature rises to 50-60°C, while the relative humidity further drops to 15-20%. There are two ways to treat the outlet air on the high-temperature side of the low-temperature condensate heat exchanger (3): one way is to directly discharge it into the environment, which can make the system's drying box in a negative pressure state. state, thereby improving the drying efficiency; another way is to mix with the low-temperature and low-humidity air at the low-temperature side outlet of the low-temperature condensate heat exchanger (3) and enter the next cycle; under the action of the second circulation fan (4), they are passed into the direct injection vacuum tube collector (5), and the direct injection vacuum tube collector (5) converts solar radiation energy into heat energy, further heating the wet air with a temperature of 50-60°C and a relative humidity of 15%-20% entering therein, and the temperature rises to 90-100°C, and the relative humidity continues to drop to 10%; the high-temperature and low-humidity air at this time has a good drying ability, and a part of the air is sent to the drying box (6) for high-temperature drying of the product; Fresh water preparation: The temperature of the wet air coming out of the drying box (6) is 60-70°C, and the relative humidity reaches 80-100%. This part of the wet air enters the drying and dehumidification section of the rotary coating adsorption heat exchanger (1). After being regenerated and rotated to the drying and dehumidification section, the strong adsorption photosensitive hydrophilic gel layer absorbs the moisture in the incoming wet air and dries and dehumidifies it. The moisture content drops sharply, the relative humidity drops to 30%, and the temperature drops to 40-50°C. It then enters the medium-temperature condensation heat exchanger (2) to participate in the next cycle. Another part of the wet air coming out of the direct injection vacuum tube collector (5) The dehumidified air is sent to the regeneration section of the rotary coating adsorption heat exchanger (1). This part of the humid air takes away the water vapor with a temperature of 100-120°C that is released and overflowed from the photosensitive hydrophilic gel layer at a high speed under the synergistic effect of light catalysis and heat absorption and temperature rise, so that the photosensitive hydrophilic gel layer is regenerated. In addition, the water condensed in the medium-temperature condensation heat exchanger (2) and the low-temperature condensation heat exchanger (3) during the condensation process of the high-humidity hot air is separated by the first steam-water separator (10) and the second steam-water separator (11), respectively, and then filtered by the filter (8) and then sent out through the circulating water pump (9) for use as fresh water.