阅读说明：本技术 一种基于氢能源的海水淡化及制冷发电系统装置 (Seawater desalination and refrigeration power generation system device based on hydrogen energy ) 是由 吴震 尧兢 朱鹏飞 张早校 于 2021-07-12 设计创作，主要内容包括：本发明公开了一种基于氢能源的海水淡化及制冷发电系统装置,水解反应器的进水口和海水连通,水解反应器的出气口连接至氢燃料电池,氢燃料电池的湿空气出口连接至冷却装置,冷却装置的出气端连接至水分回收装置的进气端,水分回收装置的出水端连接至水箱,该装置通过氢化物与海水的水解反应产生氢气,氢气在燃料电池中与氧气反应产生淡水,实现海水中的水分和盐分的分离,水中大量存在的Cl～-、Ca～(2+)、Mg～(2+)等离子能够破坏氢化物水解产生的钝化膜,促进氢化物水解反应的发生,降低对水解催化剂的要求,再通过半导体制冷和超疏水表面技术回收湿空气中的淡水,同时产生低温空气,进而实现海水淡化、制冷和发电三重功能。(The invention discloses a seawater desalination and refrigeration power generation system device based on hydrogen energy, wherein a water inlet of a hydrolysis reactor is communicated with seawater, an air outlet of the hydrolysis reactor is connected to a hydrogen fuel cell, a wet air outlet of the hydrogen fuel cell is connected to a cooling device, an air outlet end of the cooling device is connected to an air inlet end of a moisture recovery device, an water outlet end of the moisture recovery device is connected to a water tank, the device generates hydrogen through hydrolysis reaction of hydride and seawater, the hydrogen reacts with oxygen in the fuel cell to generate fresh water, separation of moisture and salt in the seawater is realized, and a large amount of waterCl ‑ 、Ca 2+ 、Mg 2+ The plasma can destroy a passive film generated by hydride hydrolysis, promote the generation of hydride hydrolysis reaction, reduce the requirement on a hydrolysis catalyst, recover fresh water in wet air by semiconductor refrigeration and a super-hydrophobic surface technology, and generate low-temperature air at the same time, thereby realizing triple functions of seawater desalination, refrigeration and power generation.)

1. A seawater desalination and refrigeration power generation system device based on hydrogen energy is characterized by comprising a hydrolysis reactor (3), wherein a water inlet (19) of the hydrolysis reactor (3) is communicated with seawater, an air outlet (21) of the hydrolysis reactor (3) is connected to a hydrogen fuel cell (6), a wet air outlet of the hydrogen fuel cell (6) is connected to a cooling device (7), an air outlet end of the cooling device (7) is connected to an air inlet end of a moisture recovery device (13), an water outlet end of the moisture recovery device (13) is connected to a water tank (9), and the moisture recovery device (13) is further provided with a low-temperature air outlet (11);

the hydrolysis reactor (3) comprises a reactor cylinder (24), a hydride bed layer (4) is arranged at the middle lower part in the reactor cylinder (24), and capillary fibers (25) are arranged in the hydride bed layer (4);

the metal foam (18) is filled in the moisture recovery device (13), a gap is formed between the metal foam (18) and the air inlet end of the moisture recovery device (13), and a gap is formed between the metal foam (18) and the water outlet end of the moisture recovery device (13); a semiconductor refrigerating sheet (12) is arranged outside the moisture recovery device (13), and the semiconductor refrigerating sheet (12) is arranged outside the metal foam (18); the surface of the metal foam (18) is coated with a superhydrophobic coating.

2. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the cooling device (7) is a cryocooler.

3. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the cold end of the semiconductor refrigeration sheet (12) is in contact with the outer side wall of the moisture recovery device (13), and the hot end of the semiconductor refrigeration sheet (12) is in contact with seawater.

4. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the upper end of the water reactor cylinder (24) is detachably connected with a reactor cover (22), and the water inlet (19) and the air outlet (21) are both arranged on the reactor cover (22); the reactor cover (22) is provided with a safety valve (20).

5. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the pressure bearing range of the hydrolysis reactor (3) is 0-5bar, and the temperature bearing range is 0-120 ℃.

6. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the hydrogen fuel cell (6) is a proton exchange membrane fuel cell or a hydrogen phosphate fuel cell.

7. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the semiconductor refrigeration sheet (12) is connected with a solar panel (8).

8. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the solar cell panel is a mono-crystalline silicon solar cell panel, a polycrystalline silicon solar cell panel, a thin film solar cell panel or an organic solar cell panel.

9. The device for desalination and refrigeration of power generation based on hydrogen energy of any one of claims 1-8, wherein the hydride bed layer (4) is a mixture of hydride and hydrolysis catalyst, and the capillary fiber (25) is hydrophilic material.

10. The seawater desalination and refrigeration power generation system device based on hydrogen energy as claimed in claim 1, wherein the cooling device (7) is a counterflow heat exchanger, the cooling device (7) is provided with a second inlet (28) and a second outlet (29), the second inlet (28) is communicated with the low-temperature air outlet (11), and the second outlet (29) is communicated to air.

Technical Field

The invention belongs to the field of seawater desalination and power generation, and particularly relates to a seawater desalination and refrigeration power generation system device based on hydrogen energy.

Background

The seawater desalination technology converts seawater into fresh water by removing salt from the seawater. Under the condition that the current fresh water resources are increasingly tense, the seawater desalination can increase the supply of fresh water in coastal areas and can also provide necessary fresh water resources for the survival of islands, ships and other occasions.

At present, the methods for desalinating seawater mainly comprise multiple-effect evaporation, multi-stage flash evaporation, vapor compression distillation, a reverse osmosis method, an electrodialysis method and a freezing method. The methods mainly realize the separation of water and salt by physical methods such as evaporation, permeation and the like, and are adopted by the existing large-scale seawater desalination plants. The methods have obvious energy consumption and price advantages in large-scale application scenes, but for small-scale or special application occasions (island survival and portable occasions), the problems of complex devices, high additional energy input, slow response speed and the like still exist. In addition, the methods mainly aim at the seawater desalination function, basically have no other functions, and cannot provide various substances and energy required for survival at the same time.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a seawater desalination and refrigeration power generation system device based on hydrogen energy, so as to solve the problems that the seawater desalination device in the prior art has single function and is difficult to provide other substances and energy.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

a seawater desalination and refrigeration power generation system device based on hydrogen energy is characterized by comprising a hydrolysis reactor, wherein a water inlet of the hydrolysis reactor is communicated with seawater, an air outlet of the hydrolysis reactor is connected to a hydrogen fuel cell, a wet air outlet of the hydrogen fuel cell is connected to a cooling device, an air outlet end of the cooling device is connected to an air inlet end of a moisture recovery device, an water outlet end of the moisture recovery device is connected to a water tank, and the moisture recovery device is also provided with a low-temperature air outlet;

the hydrolysis reactor comprises a reactor cylinder, wherein a hydride bed layer is arranged at the middle lower part in the reactor cylinder, and capillary fibers are arranged in the hydride bed layer;

the metal foam is filled in the moisture recovery device, a gap is formed between the metal foam and the air inlet end of the moisture recovery device, and a gap is formed between the metal foam and the water outlet end of the moisture recovery device; a semiconductor refrigerating sheet is arranged outside the moisture recovery device and arranged outside the metal foam; the surface of the metal foam is coated with a super-hydrophobic coating.

The invention is further improved in that:

preferably, the cooling means is a cryocooler.

Preferably, the cold end of the semiconductor refrigeration piece is in contact with the outer side wall of the moisture recovery device, and the hot end of the semiconductor refrigeration piece is in contact with the seawater.

Preferably, the upper end of the water reactor cylinder is detachably connected with a reactor cover, and the water inlet and the air outlet are both arranged on the reactor cover; the reactor cover is provided with a safety valve.

Preferably, the pressure bearing range of the hydrolysis reactor is 0-5bar, and the temperature bearing range is 0-120 ℃.

Preferably, the hydrogen fuel cell is a proton exchange membrane fuel cell or a hydrogen phosphate fuel cell.

Preferably, the semiconductor refrigeration piece is connected with a solar panel.

Preferably, the solar cell panel is a monocrystalline silicon solar cell panel, a polycrystalline silicon solar cell panel, a thin film solar cell panel or an organic solar cell panel.

Preferably, the hydride bed layer is a mixture of hydride and a hydrolysis catalyst, and the capillary fibers are hydrophilic materials.

Preferably, the cooling device is a counter-flow heat exchanger, the cooling device is provided with a second inlet and a second outlet, the second inlet is communicated with the low-temperature air outlet, and the second outlet is communicated to the air.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses a seawater desalination and refrigeration power generation system device based on hydrogen energy, which comprises a hydrolysis reactor, wherein a water inlet of the hydrolysis reactor is communicated with seawater, an air outlet of the hydrolysis reactor is connected to a hydrogen fuel cell, a wet air outlet of the hydrogen fuel cell is connected to a cooling device, an air outlet end of the cooling device is connected to an air inlet end of a moisture recovery device, an water outlet end of the moisture recovery device is connected to a water tank, and the moisture recovery device is also provided with a low-temperature air outlet; the device generates hydrogen through the hydrolysis reaction of hydride and seawater, the hydrogen reacts with oxygen in the fuel cell to generate fresh water, the separation of water and salt in the seawater is realized, and a great amount of Cl exists in the seawater^-、Ca²⁺、Mg²⁺The plasma can destroy a passive film generated by hydride hydrolysis, promote the generation of hydride hydrolysis reaction, reduce the requirement on a hydrolysis catalyst, recover fresh water in wet air by semiconductor refrigeration and a super-hydrophobic surface technology, and generate low-temperature air at the same time, thereby realizing triple functions of seawater desalination, refrigeration and power generation. The device has the advantages of low internal temperature and pressure, mild reaction conditions, clear device components, simple and convenient operation, small volume and light weight, and is suitable for portable occasions and fixed occasions; the method can provide fresh water resources, electric energy and cold energy for small-scale or special application occasions, and improve the living conditions of remote areas at sea and islands.

Further, as one of the proposals, the cooling device is a cryocooler, and further cools the air output from the fuel cell.

Furthermore, the semiconductor refrigeration piece cools the moisture recovery device through the cold end, and the hot end is in contact with the seawater to exchange heat.

Furthermore, the water reactor is provided with a detachable reactor cover, so that the water reactor is convenient to detach and the internal materials are replaced.

Furthermore, the pressure bearing range and the temperature bearing range of the water reactor can meet the requirement of seawater reaction.

Furthermore, the moisture recovery device is connected with a solar cell panel, so that the solar energy can meet the demand of the semiconductor refrigeration sheet on electricity utilization.

Furthermore, the capillary fiber arranged in the hydride bed layer is a hydrophilic material, and water is conveyed to the bottom of the bed layer through capillary force.

Further, in another embodiment of the present invention, the cooling device is a counter-flow heat exchanger, so that the cooling device can recycle the cooling air output from the moisture recovery device in the whole system to cool the humid air output from the hydrogen fuel cell, thereby reducing the energy consumption required by the cooling air and realizing the full utilization of energy.

Drawings

FIG. 1 is a diagram of a system for desalinating seawater and refrigerating electric power generation based on hydrogen energy according to the present invention;

FIG. 2 is a structural diagram of a seawater desalination and refrigeration power generation system based on hydrogen energy according to embodiment 2 of the present invention;

FIG. 3 is a schematic view of the structure of the moisture recovery device according to the present invention;

FIG. 4 is a schematic view of the hydrolysis reactor configuration of the present invention;

in the figure: 1. the device comprises a seawater inlet, 2, an inlet pump, 3, a hydrolysis reactor, 4, a hydride bed layer, 5, a fuel cell anode inlet, 6, a hydrogen fuel cell, 7, a cooling device, 8, a solar cell panel, 9, a water tank, 10, a water outlet, 11, a low-temperature air outlet, 12, a semiconductor refrigeration sheet, 13, a moisture recovery device, 14, a wet air inlet, 15, a fuel cell cathode inlet, 16, a semiconductor refrigeration sheet cold end, 17, a semiconductor refrigeration sheet hot end, 18, metal foam, 19, a water inlet, 20, a safety valve, 21, an air outlet, 22, a reactor cover, 23, sealing threads, 24, a reactor cylinder, 25, capillary fibers, 26, a first inlet, 27, a first outlet, 28, a second inlet, 29 and a second outlet.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, the invention discloses a seawater desalination and power generation system device based on hydrogen energy, which comprises an inlet pump 2, a hydrolysis reactor 3, a hydrogen fuel cell 6, a cooling device 7, a moisture recovery device 13, a semiconductor refrigeration sheet 12, a solar cell panel 8 and a water tank 9. The cooling device in this embodiment is a cryocooler for cooling the humid air output by the cathode. Air or seawater is introduced into the low-temperature cooler, and then the wet air output by the cathode is cooled to normal temperature.

The inlet pump 2 pumps seawater, the seawater outlet end of the inlet pump 2 is connected with the water inlet 19 of the hydrolysis reactor 3, the air outlet 21 of the hydrolysis reactor 3 is communicated with the anode inlet of the hydrogen fuel cell 6, the cathode of the hydrogen fuel cell 6 is communicated with air, the air enters the hydrogen fuel cell from the cathode inlet of the hydrogen fuel cell 6, the wet air outlet of the hydrogen fuel cell 6 is communicated with the first inlet 26 of the cooling device 7, the first outlet 27 of the cooling device 7 is communicated with the moisture recovery device 13, the semiconductor refrigeration sheet 12 is arranged on the upper portion of the moisture recovery device 13, and the water outlet 10 of the moisture recovery device 12 is communicated with the water tank 9. The moisture recovery device 9 is provided with a low-temperature air outlet 11, the semiconductor refrigerating sheet 12 is connected with the solar cell panel 8, and the solar cell panel 8 provides electric energy for the semiconductor refrigerating sheet 12.

Referring to fig. 3, the metal foam 18 is filled in the central part of the inside of the moisture recovery device 13, and along the flow direction of the humid air, a certain gap is formed between the metal foam 18 and the inlet end (air inlet end) of the humid air and the end surface (air outlet end) of the low-temperature air outlet 11, that is, the central part of the moisture recovery device 13 is filled with the metal foam 18, and the metal foam 18 is in close contact with the other four wall surfaces of the moisture recovery device 13, so that the humid air can fully act with the metal foam 18 in the flow process; the surface of the metal foam 18 is coated with a super-hydrophobic coating so as to improve the separation efficiency of liquid water and solid surfaces and enhance the heat transfer effect between air and solid wall surfaces; the semiconductor refrigeration piece 12 is arranged on the outer side wall surface of the moisture recovery device 13, the semiconductor refrigeration piece 12 can be placed on one side wall surface and can also be placed on a plurality of side wall surfaces according to the cooling requirement, the cold end 16 of the semiconductor refrigeration piece is directly contacted with the outer wall of the moisture recovery device 13, and the cold energy is input into the moisture recovery device 13 in a heat conduction mode; the hot end 17 of the semiconductor refrigeration sheet is contacted with seawater, and the seawater is adopted for heat exchange. Semiconductor refrigeration piece cold end 16 and metal foam 18 set up relatively for semiconductor refrigeration piece cold end 16 can be abundant cools off metal foam 18 through the outer wall of moisture recovery device 13.

The moisture recovery device 13 and the metal foam 18 are made of materials with light weight and good heat conductivity, such as aluminum, heat-conducting plastics, and the like; the surface of the metal foam 18 is coated with super-hydrophobic materials, such as polytetrafluoroethylene, fluorocarbon wax and the like, so that the contact angle of water on the surface of the metal foam 18 is increased to 150 degrees; the cold end 16 of the semiconductor refrigeration sheet can be tightly connected with the moisture recovery device 13 through high-thermal-conductivity materials such as silicone grease, so that the thermal contact resistance between the semiconductor refrigeration sheet and the moisture recovery device is reduced, and the efficient heat transfer is realized.

Referring to fig. 4, the hydrolysis reactor 3 includes a reactor cover 22, a water inlet 19, a gas outlet 21, a safety valve 20, a reactor cylinder 24, a sealing screw 23, a hydride bed 4, and a capillary fiber 25. The middle lower part of the reactor cylinder 24 is provided with a hydride bed layer 4, and the height of the bed layer is 1/3-2/3 of the cylinder height; the inside of the hydride bed layer 4 is provided with capillary fibers 25, so that water can easily permeate to the lower part of the bed layer; the upper part of the reactor cylinder 24 is provided with a reactor cover 22 which is connected with the reactor cover through a sealing thread 23, so that the sealing reliability of the connection is ensured; the upper part of the reactor cover 22 is provided with a water inlet 19, a gas outlet 21 and a safety valve 20.

The hydride bed layer 4 is a mixture of hydride and hydrolysis catalyst, the hydride can be selected from hydrogen storage materials with high hydrogen storage capacity and easily controlled hydrolysis reaction, such as magnesium hydride, aluminum hydride, sodium borohydride and the like, and the hydrolysis catalyst can be selected from Cl-containing^-、Al³⁺And the like which may damage the hydrolytic passivation film; the capillary fibers 25 in the hydride bed layer 4 mainly convey water to the bottom of the bed layer through capillary force to realize uniform reaction of the whole reactor, and the material of the capillary fibers 25 can be selected from hydrophilic materials such as cotton; the reactor barrel 24 can be made of light materials such as plastics and aluminum, the pressure bearing range of the hydrolysis reactor 3 is 0-5bar, and the temperature bearing range is 0-120 ℃; the safety valve 20 is used for regulating and controlling the pressure in the hydrolysis reactor 3, the safety valve 20 is an electromagnetic valve, when the pressure in the hydrolysis reactor 3 is greater than a set pressure, the safety valve 20 opens to exhaust, and when the pressure in the hydrolysis reactor 3 is less than the set pressure, the safety valve 20 closes.

The hydrogen fuel cell 6 can be selected from a proton exchange membrane fuel cell, a hydrogen phosphate fuel cell and the like; the solar cell panel 8 is selected from a monocrystalline silicon solar cell panel, a polycrystalline silicon solar cell panel, a thin film type solar cell panel and an organic solar cell panel; the hydride can be selected from high hydrogen storage capacity hydrogen storage materials such as magnesium hydride, aluminum hydride, sodium borohydride and the like; the moisture recovery device and the metal foam can be made of materials with light weight and good heat-conducting property, such as aluminum, heat-conducting plastics and the like; the super-hydrophobic material can be selected from polytetrafluoroethylene, fluorocarbon wax and other materials.

The working process of the embodiment:

the inlet pump 2 is used for sending seawater into the hydrolysis reactor 3, the inlet pump 2 is connected with a water inlet 19 of the hydrolysis reactor 3, and a gas outlet 21 of the hydrolysis reactor 3 is connected with an anode inlet 5 of the fuel cell; air is introduced into the hydrogen fuel cell 6 from the fuel cell cathode inlet 15, cathode wet air is generated after the air reacts in the hydrogen fuel cell, the cathode wet air enters the cooling device 7 through the first inlet 26, the cathode wet air enters the wet air inlet 14 of the moisture recovery device 13 through the first outlet 27 of the cooling device 7 after being cooled in the cooling device 7, and the wet air is separated into liquid water and low-temperature air in the moisture recovery device 13; liquid water flows out from the water outlet 10 and enters the water tank 9, and low-temperature air is discharged from the low-temperature air outlet 11; the semiconductor refrigerating sheet 12 is in direct contact with the moisture recovery device 13 to provide cold energy for the moisture recovery device; the solar cell panel 8 is connected to the semiconductor refrigerating sheet 12 through a wire to provide electric energy for the semiconductor refrigerating sheet 12.

The device has low requirements on the quality of seawater, and Cl widely exists in seawater^-、Ca²⁺、Mg²⁺The hydrolysis reaction is facilitated, and the adaptability and the stability are very good; the hydrogen fuel cell 6 is a low-temperature fuel cell using hydrogen and oxygen as fuel, and can be selected from a proton exchange membrane fuel cell, a phosphoric acid fuel cell and the like, and the working temperature is 20-80 ℃; the semiconductor refrigerating plate 12 is a thermoelectric refrigerating device which generates cold through the Peltier effect, and the single-stage semiconductor refrigerating plate can generate refrigerating temperature difference of 60 ℃; the solar cell panel 8 is a device for directly converting solar energy into electric energy by utilizing a photoelectric effect, the solar cell panel 8 can be selected from a monocrystalline silicon solar cell panel, a polycrystalline silicon solar cell panel, a thin film type solar cell panel and an organic solar cell panel, and the energy conversion efficiency of the solar cell panel 8 is 10-24%.

The working principle of the system is as follows:

the working principle of the system is described below with reference to specific examples: seawater is input into the hydrolysis reactor 3 through the inlet pump 2 and the water inlet 19, and hydride MgH is filled in the hydrolysis reactor 3₂And hydrolysis catalyst AlCl₃The seawater reacts with solid magnesium hydride to generate magnesium hydroxide and hydrogen, and the reaction equation is shown as formula (1); hydrogen enters the hydrogen fuel cell 6 through the gas outlet 21 and the anode inlet 5 of the fuel cell, and hydrogenThe fuel cell selects a proton exchange membrane fuel cell, air enters the hydrogen fuel cell 6 from a cathode inlet 15 of the fuel cell, hydrogen and oxygen generate electrochemical reaction in the fuel cell and output electric energy outwards, the reaction temperature is about 50 ℃, and the reaction equation is shown as a formula (2); the anode hydrogen gas is subjected to oxidation reaction to generate hydrogen ions which are transmitted to the cathode of the fuel cell; oxygen in the cathode air is subjected to reduction reaction to generate oxygen ions, the oxygen ions are combined with hydrogen ions of the anode to form water, and the water is diffused into the cathode air, so that the humidity of the air is improved, and cathode wet air is formed; cathode wet air passes through the cooling device and enters the moisture recovery device 13 from the wet air inlet 14, meanwhile, the solar panel 8 provides electric energy for the semiconductor refrigerating sheet 12, cold energy generated by the semiconductor refrigerating sheet 12 is transmitted to the moisture recovery device 13, and the temperature of the cold end 16 of the semiconductor refrigerating sheet is lower than the room temperature by about 10-20 ℃; the wet air is fully condensed in the metal foam 18, and the quick separation of liquid water and a solid wall surface is realized on the super-hydrophobic coating on the surface of the metal foam 18, and the wet air is separated into liquid water and low-temperature air; the liquid water flows into the water tank, so that fresh water resources can be provided; cold energy can be provided by low temperature air.

MgH₂+2H₂O→Mg(OH)₂+2H₂↑ (1)

2H₂+O₂→2H₂O (2)

Example 2

Referring to fig. 2, the cooling device 7 of this embodiment is a counter-flow heat exchanger, and the counter-flow heat exchanger may be a light-weight and good-heat-exchange-effect heat exchanger such as a format heat exchanger and a tubular heat exchanger. The inside of the counterflow heat exchanger is provided with two mutually isolated, oppositely flowing fluids, one being humid air to be cooled and one being low-temperature air to cool the humid air, and the cooling device 7 is provided with two gas inlets and gas outlets, a first inlet 26, a first outlet 27, a second inlet 28 and a second outlet 29, respectively. The second inlet 28 and the low-temperature air outlet 11 of the moisture recovery device 13 enter the cooling device 7 from the second inlet 28, and after cathode wet air is cooled, the cathode wet air is discharged through the second outlet 29; the humid air with the higher cathode temperature enters the cooling device 7 through the first inlet 26 of the cooling device 7, is cooled, and then enters the moisture recovery device 13 through the first outlet 27. The two flows in the counter-flow heat exchanger are isolated and only heat exchange takes place.

The driving force of the device mainly comes from solid hydride and widely-existing solar energy, other pressurizing and heating devices are not needed, the driving force is single in source and convenient to transport; the device has high response speed, and the hydride hydrolysis reaction and the electrochemical reaction of the fuel cell have high speed, and can generate water in several minutes; the invention adopts solar energy to provide energy for the refrigerating device, the whole device does not discharge pollutants outside, hydride can be recycled, and the device is energy-saving and environment-friendly.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.