Water supply system for producing hydrogen by electrolyzing water

Abstract

The utility model discloses a water supply system for producing hydrogen by electrolyzing water, which comprises a hot working medium circulating system and a cold working medium circulating system, the hot working medium circulating system comprises a constant-temperature hot water bath, the constant-temperature hot water bath is communicated with a membrane distillation device through a hot circulating pipeline, an aluminum cold wall is arranged on the water outlet side of the membrane distillation device, and the aluminum cold wall is communicated with the membrane distillation device through a hot circulating pipeline. A liquid collecting tank is arranged under the aluminum cold wall; a hydrogen pipeline of the water electrolysis hydrogen production device is communicated with a hydrogen storage tank; the water supply system has the beneficial effects that through the water supply system consisting of the hot working medium circulating system, the cold working medium circulating system and the interface evaporation device, the consumption of fresh water resources and the discharge of waste water in the process of producing hydrogen by electrolyzing water are reduced, so that the pollution to the environment is reduced, and meanwhile, the recycling of the water resources is also realized; and the hydrogen energy production system and the water supply system operate together, so that the complexity and the cost input of the system are reduced, and the overall output efficiency of hydrogen energy is also improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen energy production field especially relates to a water supply system of water electrolysis hydrogen production. BACKGROUND

[0002] Hydrogen energy as a clean, efficient energy carrier, has been widely concerned. Water electrolysis hydrogen production as one of the key technologies of hydrogen energy production, has the advantages of wide raw material sources, pollution-free production process. However, the traditional water electrolysis hydrogen production technology has high energy consumption, large water resource consumption, low water resource recycling efficiency, and high equipment cost, which limits its large-scale application. In order to reduce the water resource consumption in the process of water electrolysis hydrogen production, researchers have developed a variety of water-saving water electrolysis hydrogen production technologies. For example, using seawater desalination technology to provide water source for water electrolysis hydrogen production, or optimizing the structure and operating conditions of electrolytic cell to improve the utilization efficiency of water. However, these technologies still face many challenges in practical application, such as high equipment cost, high energy consumption of seawater desalination, low efficiency of electrolytic cell, etc.

[0003] At the same time, there is no integrated high-efficiency water-saving hydrogen energy production and water supply device process system in the prior art. Most of the hydrogen energy production devices and water supply devices are designed and operated separately, which not only increases the complexity and cost of the system, but also reduces the overall output efficiency. Therefore, it is of great significance to develop a system integrating hydrogen energy production and water supply functions for improving hydrogen energy output efficiency and reducing operating cost. SUMMARY

[0004] The utility model discloses a water supply system of water electrolysis hydrogen production and overcomes the above prior art's insufficient, and effectively solves the existing problem of low hydrogen energy output water resource utilization rate.

[0005] The utility model discloses a water supply system of water electrolysis hydrogen production, including hot working medium circulation system and cold working medium circulation system, the hot working medium circulation system includes constant temperature hot water bath, and the constant temperature hot water bath is linked with membrane distillation device through the heat circulation pipeline intercommunication, is provided with aluminum cold wall in the water side of membrane distillation device, the outside wall of aluminum cold wall is pasted with the cold end face of semiconductor refrigeration piece, and the hot end face of semiconductor refrigeration piece is pasted with the cold end face of semiconductor radiator, is provided with the liquid collecting groove below aluminum cold wall, and the liquid collecting groove is connected with the liquid guide pipeline, and the output end of liquid guide pipeline is linked with water electrolysis hydrogen production device, and the hydrogen gas pipeline of water electrolysis hydrogen production device is linked with hydrogen storage tank.

[0006] Further, the cold working medium circulation system includes a constant temperature cold water bath, and the cold circulation pipeline of the constant temperature cold water bath is connected with a cold dissolving tank. The cold end face of the cold dissolving tank is pasted with the hot end face of the semiconductor radiator.

[0007] Further, a glass rotor flowmeter is installed on the cold circulation pipeline.

[0008] Further, a branch pipeline is communicated with the return section of the cold circulation pipeline, the output end of the branch pipeline is communicated with the input end of the interface evaporation device, and the output end of the interface evaporation device is communicated with the liquid guide pipeline.

[0009] Further, the interface evaporation device comprises a water dissolving device, a heat insulation layer is installed at the top opening of the water dissolving device, a plurality of water absorbing cotton cores are inserted through the heat insulation layer, the top end of the water absorbing cotton core is in contact with the bottom surface of a light absorber, the light absorber is placed on the top wall of the heat insulation layer, a semicircular glass cover is installed at the top opening of the water dissolving device, a vapor pipeline is communicated with the arc top of the semicircular glass cover, and the output end of the vapor pipeline is communicated with the liquid guide pipeline.

[0010] Further, a cooling collector is installed on the vapor pipeline.

[0011] Further, a dryer is installed on the hydrogen pipeline.

[0012] Further, the water circulation pipeline of the electrolytic water hydrogen production device is communicated with the liquid guide pipeline.

[0013] Further, a booster pump is installed on the hot circulation pipeline and the cold circulation pipeline.

[0014] Further, a power supply control device is installed on the semiconductor refrigeration sheet and the power supply circuit of the electrolytic water hydrogen production device.

[0015] The hydrogen energy production system and the water supply system are operated together, not only reducing the complexity and cost input of the system, but also improving the overall output efficiency of hydrogen energy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a system structure view of the utility model;

[0017] Fig. 2 It is a structure view of the interface evaporation device in the utility model;

[0018] In the figure, 1 constant temperature hot water bath, 2 membrane distillation device, 3 heat circulation pipeline, 4 aluminum cold wall, 5 semiconductor refrigerating sheet, 6 semiconductor radiator, 7 liquid collecting tank, 8 liquid guide pipeline, 9 electrolytic water hydrogen production device, 10 hydrogen pipeline, 11 hydrogen storage tank, 12 constant temperature cold water bath, 13 cold circulation pipeline, 14 cold dissolving box, 15 glass rotor flowmeter, 16 branch pipeline, 17 interface evaporation device, 171 water dissolving device, 172 heat insulation layer, 173 water-absorbing cotton core, 174 light-absorbing body, 175 semicircular glass cover, 176 vapor pipeline, 177 cooling collector, 18 dryer, 19 water circulation pipeline, 20 booster pump, 21 power supply control device. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be described with reference to the drawings:

[0020] As Figs. 1-2 shown in the figure, a water supply system for electrolytic water hydrogen production, characterized by comprising a hot working medium circulation system and a cold working medium circulation system, the hot working medium circulation system comprising a constant temperature hot water bath 1, the constant temperature hot water bath 1 being connected in communication with a membrane distillation device 2 through a heat circulation pipeline 3, an aluminum cold wall 4 being arranged on the water outlet side of the membrane distillation device 2, the outer side wall of the aluminum cold wall 4 being in close contact with the cold end face of a semiconductor refrigerating sheet 5, the hot end face of the semiconductor refrigerating sheet 5 being in close contact with the cold end face of a semiconductor radiator 6, a liquid collecting tank 7 being arranged directly below the aluminum cold wall 4, a liquid guide pipeline 8 being connected in communication with the liquid collecting tank 7, the output end of the liquid guide pipeline 8 being connected in communication with an electrolytic water hydrogen production device 9, a hydrogen pipeline 10 of the electrolytic water hydrogen production device 9 being connected in communication with a hydrogen storage tank 11, the cold working medium circulation system comprising a constant temperature cold water bath 12, a cold circulation pipeline 13 of the constant temperature cold water bath 12 being connected in communication with a cold dissolving box 14, the cold end face of the cold dissolving box 14 being in close contact with the hot end face of the semiconductor radiator 6, a glass rotor flowmeter 15 being installed on the cold circulation pipeline 13.

[0021] Specifically, the hot working medium circulation system can reduce the consumption of water resources for electrolytic water hydrogen production and realize the recycling of water resources.

[0022] In actual use, the constant temperature hot water bath 1 heats the water resources used for electrolytic hydrogen production, and through the output section of the heat circulation pipeline 3, hot water is delivered to the membrane distillation device 2. At this time, the selective permeability of the microporous membrane in the membrane distillation device 2 is used to retain liquid water that cannot pass through the hydrophobic membrane holes on the hydrophobic side, and the liquid water that cannot pass through is returned to the constant temperature hot water bath 1 through the return section of the heat circulation pipeline 3 for subsequent circulation. The water vapor produced by the hot water can pass through the membrane into the water outlet side. At this time, the water vapor that passes through the membrane meets the aluminum cold wall 4 with lower temperature and gradually condenses, and flows into the liquid collection tank 7 below along the side wall of the aluminum cold wall 4. The large amount of concentrated pure water collected in the liquid collection tank 7 is delivered to the electrolytic water hydrogen production device 9 through the liquid guide pipeline 8 for hydrogen production. The hydrogen produced is finally delivered to the hydrogen storage tank 11 through the hydrogen pipeline 10 for storage.

[0023] In the above system operation process, the cold source generated by the operation of the semiconductor refrigeration sheet 5 will continuously conduct to the aluminum cold wall 4 to keep it in a low temperature state, thereby improving the condensation effect of the vapor. During the operation of the semiconductor refrigeration sheet 5, the other end will generate heat to produce a hot end face. In order to ensure the normal operation of the machine body, a semiconductor radiator 6 is installed on the hot end face of the semiconductor refrigeration sheet 5 to continuously dissipate heat and cool it, further ensuring the safe operation of the electromechanical equipment. The constant temperature cold water bath 12 in the cold working medium circulation system delivers the low temperature water source to the cold dissolving tank 14 through the cold circulation pipeline 13. At this time, the cold end face of the cold dissolving tank 14 as a cooling source is in contact with the hot end face of the semiconductor radiator 6, so that the machine body can be cooled during continuous operation to avoid high temperature burning. The water source after heat exchange in the cold dissolving tank 14 is returned to the constant temperature cold water bath 12 through the return section of the cold circulation pipeline 13 for continuous cooling and subsequent circulation.

[0024] As Figs. 1-2The water supply system for hydrogen production by electrolysis of water is shown, a branch pipeline 16 is communicated on the return section of the cold circulation pipeline 13, the output end of the branch pipeline 16 is communicated with the input end of the interface evaporation device 17, the output end of the interface evaporation device 17 is communicated with the liquid guide pipeline 8, the interface evaporation device 17 comprises a water dissolving device 171, a heat insulation layer 172 is installed at the top opening of the water dissolving device 171, a plurality of water absorbing cotton cores 173 are inserted through the heat insulation layer 172, the top end of the water absorbing cotton core 173 is in contact with the bottom surface of the light absorber 174, the light absorber 174 is placed on the top wall of the heat insulation layer 172, a semicircular glass cover 175 is installed on the top opening of the water dissolving device 171, a vapor pipeline 176 is communicated at the arc top of the semicircular glass cover 175, the output end of the vapor pipeline 176 is communicated with the liquid guide pipeline 8, a cooling collector 177 is installed on the vapor pipeline 176, a dryer 18 is installed on the hydrogen pipeline 10, the water circulation pipeline 19 of the hydrogen production device 9 is communicated with the liquid guide pipeline 8, a booster pump 20 is installed on the hot circulation pipeline 3 and the cold circulation pipeline 13, a power supply control device 21 is installed on the power supply line of the semiconductor refrigeration sheet 5 and the hydrogen production device 9.

[0025] Specifically, the interface evaporation device 17 installed in the system can increase the production of concentrated pure water, thereby ensuring the water consumption of the hydrogen production device 9.

[0026] In actual use, part of the water source in the return section of the cold circulation pipeline 13 flows into the water dissolving device 171 of the interface evaporation device 17 through the branch pipeline 16, at this time, the water absorbing cotton cores 173 absorb and conduct the water source to the light absorber 174 placed on the top wall of the heat insulation layer 172, the light absorber 174 here can use low-cost carbonized sugarcane, and the light absorber 174 heats the water source absorbed at the bottom after absorbing light to generate steam, at this time, the semicircular glass cover 175 is installed on the top end of the water dissolving device 171 to form a sealed cavity, and the steam gathered in the semicircular glass cover 175 is transported to the cooling collector 177 through the vapor pipeline 176 communicated at the top, at this time, the condensed concentrated pure water produced in the cooling collector 177 is flowed into the liquid guide pipeline 8, further increasing the production of concentrated pure water; during the operation of the hydrogen production device 9, the pure water that cannot be used in time is returned to the liquid guide pipeline 8 through the water circulation pipeline 19 for circulation; during the operation of the system, the power supply control device adjusts the power consumption of the semiconductor refrigeration sheet 5 and the hydrogen production device 9 according to the actual hydrogen energy required.

[0027] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A water supply system for hydrogen production via water electrolysis, characterized in that: The device includes a hot working fluid circulation system and a cold working fluid circulation system. The hot working fluid circulation system includes a constant temperature hot water bath (1), which is connected to a membrane distillation device (2) through a hot circulation pipeline (3). An aluminum cold wall (4) is provided on the water outlet side of the membrane distillation device (2). The outer wall of the aluminum cold wall (4) is in contact with the cold end face of a semiconductor refrigeration chip (5). The hot end face of the semiconductor refrigeration chip (5) is in contact with the cold end face of a semiconductor heat sink (6). A liquid collection tank (7) is provided directly below the aluminum cold wall (4). A liquid guiding pipeline (8) is connected to the liquid collection tank (7). The output end of the liquid guiding pipeline (8) is connected to an electrolytic water hydrogen production device (9). The hydrogen pipeline (10) of the electrolytic water hydrogen production device (9) is connected to a hydrogen storage tank (11).

2. The water supply system for hydrogen production by water electrolysis according to claim 1, characterized in that: The cold working fluid circulation system includes a constant temperature cold water bath (12), the cold circulation pipeline (13) of the constant temperature cold water bath (12) is connected to the cold melting box (14), and the cold end face of the cold melting box (14) is in contact with the hot end face of the semiconductor heat sink (6).

3. The water supply system for hydrogen production by water electrolysis according to claim 2, characterized in that: A glass rotor flowmeter (15) is installed on the cold circulation pipeline (13).

4. The water supply system for hydrogen production by water electrolysis according to claim 2, characterized in that: A branch pipe (16) is connected to the reflux section of the cold circulation pipe (13). The output end of the branch pipe (16) is connected to the input end of the interface evaporation device (17). The output end of the interface evaporation device (17) is connected to the liquid guiding pipe (8).

5. A water supply system for hydrogen production by water electrolysis according to claim 4, characterized in that: The interface evaporation device (17) includes a water container (171), an insulation layer (172) is installed at the top opening of the water container (171), and several absorbent cotton cores (173) are inserted through the insulation layer (172). The top of the absorbent cotton cores (173) is in contact with the bottom surface of the light absorber (174). The light absorber (174) is placed on the top wall of the insulation layer (172). A semi-circular glass cover (175) is installed at the top opening of the water container (171). A steam pipe (176) is connected to the arc apex of the semi-circular glass cover (175). The output end of the steam pipe (176) is connected to the liquid guiding pipe (8).

6. A water supply system for hydrogen production by water electrolysis according to claim 5, characterized in that: A cooling collector (177) is installed on the steam pipe (176).

7. A water supply system for hydrogen production by water electrolysis according to claim 1, characterized in that: A dryer (18) is installed on the hydrogen pipeline (10).

8. A water supply system for hydrogen production by water electrolysis according to claim 1, characterized in that: The water circulation pipeline (19) of the water electrolysis hydrogen production device (9) is connected to the liquid guiding pipeline (8).

9. A water supply system for hydrogen production by water electrolysis according to claim 2, characterized in that: A booster pump (20) is installed on both the hot circulation pipeline (3) and the cold circulation pipeline (13).

10. A water supply system for hydrogen production by water electrolysis according to claim 2, characterized in that: A power control device (21) is installed on the power supply lines of the semiconductor cooling chip (5) and the water electrolysis hydrogen production device (9).

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