Water cooling waste heat recovery system of multiple groups of electrolytic cells

Abstract

The invention discloses a water cooling waste heat recovery system for multiple groups of electrolytic cells. The system comprises an electrolytic separation device (1), a water electrolysis cooling device and a flash vaporization-condensation device, the electrolytic separation device (1) comprises a plurality of groups of electrolytic cells; the water electrolysis cooling device comprises a water cooler (2), a water flow regulating valve (3) and a water cooling circulating pump (4); the flash vaporization-condensation device comprises a liquid-liquid gas jet pump (5), a flash vaporizer barrel (9) and a heat exchanger (15); the electrolytic separation device (1) is connected with the water electrolysis cooling device through an electrolyte conveying pipeline (19) and an electrolyte circulating pipeline (20), and the water electrolysis cooling device is connected with the flash vaporization-condensation device through a hot water output pipeline (10) and a cooling water inlet pipeline (12). Heat generated in the electrolysis process is recycled through water, the water is evaporated and condensed after heat exchange and temperature rise, and needed supplementary electrolyte is provided for the electrolytic cell. According to the method, the supplement cost of the electrolyte can be reduced, the energy consumption of the electrolytic bath can be reduced, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of water electrolysis and hydrogen production, and in particular to a system and device for recovering waste heat from the operation of multiple groups of electrolytic cells. Background Art

[0002] With the adjustment of global energy structure and the enhancement of environmental protection awareness, hydrogen, as a clean energy with high energy density, has an increasingly broad application prospect. Hydrogen can be used as an energy carrier to replace traditional fossil fuels such as gasoline and diesel for direct combustion, reducing environmental pollution and greenhouse gas emissions. It is also an important industrial gas and is widely used in chemical, metallurgical, electronic and other fields.

[0003] Among hydrogen production technologies, water electrolysis is considered to be one of the most feasible and clean methods. By electrolyzing water, electrical energy can be converted into hydrogen energy, realizing energy conversion and storage. However, traditional water electrolysis hydrogen production technology has problems such as large footprint and high electrolyte replenishment cost, which limits its application in environments with limited space and scarce resources such as offshore platforms.

[0004] In response to the above problems, using seawater electrolysis to produce hydrogen to reduce the overall cost of water electrolysis has become a new solution. As one of the most abundant water resources on earth, seawater has huge reserves and is easy to obtain, providing a sufficient source of raw materials for electrolysis of hydrogen. However, seawater electrolysis to produce hydrogen also faces some challenges, such as how to effectively utilize the heat generated during the electrolysis process? How to further reduce the overall cost of water electrolysis to produce hydrogen?

[0005] In addition, in order to adapt to the fluctuation characteristics of offshore new energy, it is often necessary to use multiple groups of electrolyzers in parallel operation. During the parallel operation, the electrolyte inlet temperature and flow rate of each electrolyzer need to be precisely controlled to ensure the stability and safety of the electrolysis process. How to achieve precise control of the electrolyte inlet temperature and flow rate of each electrolyzer is also a technical problem currently faced by technicians.

[0006] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0007] The present invention proposes a water cooling waste heat recovery system for the use of multiple groups of electrolytic cells. The present invention uses an integrated flash vaporization-condensation device, in conjunction with a water electrolyte cooling system, to utilize the low-grade waste heat generated during the electrolysis process to recover distilled water for electrolysis system replenishment, while achieving precise temperature and pressure control of the electrolyte inlet temperature and flow at the inlet of each electrolytic cell.

[0008] The present invention provides a water cooling waste heat recovery system for multiple groups of electrolytic cells, which is composed of a water electrolysis cooling device and a flash vaporization-condensation device. The water electrolysis cooling device includes a water cooler, a water flow regulating valve, and a water cooling circulation pump. The electrolyte after the flow is distributed by the gas-liquid separator enters the shell side of each cooling heat exchanger, and flows out of the flash vaporization-condensation device through the water cooling circulation pump to enter each water cooler. The water flow regulating valve regulates the cooling water flow entering each water cooler; the flash vaporization-condensation device includes a liquid-liquid gas jet pump, a concentrated brine drainage flow regulating valve, a non-condensable gas discharge flow regulating valve, a water replenishment regulating valve, a flash vaporizer cylinder, a heat exchanger, and a liquid-liquid gas jet pump. The water outlet pipeline in each water cooler is connected to the water return main pipe, and is connected to the hot water output pipeline on the flash vaporization-condensation device. Normal temperature water enters the condenser of the device and is discharged from the steam cooling water outlet. One end of the steam cooling water outlet is connected to the water replenishment port of the device, and the other end is connected to the primary fluid inlet of the liquid-liquid gas jet pump. The concentrated brine discharge port and the non-condensable gas discharge port are respectively connected to the two secondary fluid ports of the liquid-liquid gas jet pump. A regulating valve is set on the pipeline to adjust the non-condensable gas discharge flow, water replenishment amount, and concentrated brine discharge amount. A plate condenser is set on the top of the flash vaporization-condensation device to condense steam, with a condensate discharge port and a steam inlet. Distilled water is provided by the external water intake end to pump distilled water.

[0009] The water described in the present invention is preferably saline water, and more preferably seawater.

[0010] The working principle of the present invention is as follows:

[0011] After the electrolyte is separated from the gas and electrolyte by the upper gas-liquid separation system, the flow rate is adjusted to enter each water cooler for heat exchange with the cooling water, and the cooling water flow rate is adjusted to achieve precise control of the electrolyte temperature at the outlet of the water cooler. The high-temperature water that obtains heat in the heat exchanger is connected to a total pipeline and enters the flash vaporization tank of the flash vaporization-condensation device. Since the pressure in the flash vaporization tank is lower than the saturated vapor pressure corresponding to the temperature of the high-temperature water, the water entering the tank body will evaporate rapidly in a short time, and the sensible heat of the high-temperature water is converted into the latent heat of vaporization of the steam. Due to the mixed state of the two phases, the tank body obtains a constant temperature corresponding to the saturated vapor pressure. The steam moves upward and enters the upper steam pipeline, which is connected to the heat exchanger inlet in the condensation chamber. The steam is condensed by normal temperature water in the heat exchanger. The gas pressure generated by the steam consumes the vacuum degree. The steam is condensed into distilled water in the condenser, which increases the vacuum degree. The vacuum degree in the entire flash vaporization-condensation device is not consumed by the generation of steam. Normal temperature water enters the heat exchanger as condensed water of steam, and the water of the discharged condensed steam is used as the primary fluid of the ejector to extract the high-concentration brine that needs to be discharged. At the same time, part of the water is used as preheated water to replenish the flash steam tank. The non-condensable gas dissolved in the water affects the vacuum degree due to the cumulative operation time. A gas ejection port is added to the liquid-liquid gas ejector pump to discharge the non-condensable gas in the device to ensure the operation efficiency of the device. The condensed distilled water flows to the bottom of the condensation chamber and is extracted by the external water extraction end to be used as water replenishment for the electrolytic water hydrogen production system.

[0012] The present invention is achieved through the following technical solutions:

[0013] A first aspect of the present invention provides a water cooling waste heat recovery system for multiple groups of electrolytic cells, the system comprising an electrolytic separation device 1, a water electrolytic cooling device and a flash steam evaporation-condensation device;

[0014] The electrolytic separation device 1 comprises a plurality of groups of electrolytic cells;

[0015] The water electrolysis cooling device comprises a water cooler 2, a water flow regulating valve 3, and a water cooling circulation pump 4;

[0016] The flash vaporization-condensation device includes a liquid-liquid-gas jet pump 5, a flash vaporizer cylinder 9, and a heat exchanger 15; the heat exchanger 15 is located above the flash vaporizer cylinder 9; the heat exchanger 15 is used to condense steam, and is provided with a condensed water outlet and a steam inlet, and distilled water is provided by an external water intake end and a water pump draws distilled water.

[0017] The electrolytic separation device 1 is connected to the water electrolytic cooling device through the electrolyte delivery pipeline 19 and the electrolyte circulation pipeline 20, and the water electrolytic cooling device is connected to the flash steam evaporation-condensation device through the hot water output pipeline 10 and the cooling water inlet pipeline 12.

[0018] Preferably, the electrolyte outputted from the electrolytic separation device 1 enters the water cooler 2 through the electrolyte delivery pipeline 19, and the electrolyte after water cooling flows back into the electrolytic separation device 1 through the electrolyte circulation pipeline 20 to circulate and produce hydrogen;

[0019] The water produced by the flash vaporization-condensation device is used as a cooling medium and is powered by a water cooling circulation pump 4 and enters the water cooler 2 through a cooling water inlet pipe 12;

[0020] The heated hot water in the water cooler 2 enters the flash vaporizer cylinder 9 through the hot water output pipeline 10, and the water vaporizes in the flash vaporizer cylinder 9; the water outlet pipeline in each water cooler is connected to the water return main pipe, and is connected to the hot water output pipeline on the flash vaporization-condensation device.

[0021] The steam generated by water vaporization enters the heat exchanger 15 through the steam pipe, exchanges heat with the water entering the heat exchanger water inlet 13 in the heat exchanger condensation chamber 18, so that the steam condenses into condensed water and is discharged from the heat exchanger condensed water outlet 16, and the water heated after heat exchange is discharged from the steam cooling water outlet 14.

[0022] Preferably, a water flow regulating valve 3 is provided on the cooling water inlet pipeline 12, and the water flow rate entering the water cooler 2 is regulated by the water flow regulating valve 3;

[0023] Preferably, there are multiple water coolers 2 , and each water cooler 2 is equipped with an independent water flow regulating valve 3 .

[0024] Preferably, the electrolytic separation device 1 has a gas-liquid separator, and the electrolyte generated by the electrolytic separation device 1 enters the shell side of each water cooler 2 after the flow is distributed by the gas-liquid separator. The water flowing out of the flash vaporization-condensation device enters the tube side of each water cooler 2 through a water cooling circulation pump, and the two perform heat exchange.

[0025] Preferably, the water temperature in the flash vaporizer cylinder 9 is greater than the saturated steam temperature of the water under the pressure in the flash vaporizer cylinder 9 so that the water can be vaporized.

[0026] Preferably, the flash evaporator drum 9 is directly connected to the heat exchanger condensing chamber 18 .

[0027] Preferably, the steam cooling water discharged from the steam cooling water outlet 14 enters the liquid-liquid-gas jet pump 5 and serves as the primary fluid of the liquid-liquid-gas jet pump 5 to eject non-condensable gas through the non-condensable gas exhaust outlet 17 and concentrated brine through the concentrated brine drainage outlet 11 to be discharged into the environment.

[0028] Preferably, a non-condensable gas exhaust flow regulating valve 7 is provided on the pipeline corresponding to the non-condensable gas exhaust outlet 17 to adjust the non-condensable gas exhaust flow;

[0029] A brine drainage flow regulating valve 6 is provided on the pipeline corresponding to the brine drainage outlet 11 to adjust the brine drainage volume;

[0030] The flash steam vaporizer cylinder 9 is also provided with a water replenishment pipeline, and the water replenishment pipeline is provided with a water replenishment regulating valve 8 to adjust the water replenishment amount. The brine drainage flow regulating valve 6, the non-condensable gas discharge flow regulating valve 7, and the water replenishment regulating valve 8 are used to control the water level and the vacuum degree in the device, so that the waste heat recovery part is in a high-performance state.

[0031] At the same time, in conjunction with the water flow regulating valve 3, the water flow entering the water cooler 2 is adjusted through the water flow regulating valve 3, so that the entire multi-electrolyzer electrolysis system is in a high energy efficiency state, thereby improving the overall system's anti-fluctuation ability and energy utilization rate.

[0032] Preferably, water at normal temperature enters the condensation chamber 18 of the heat exchanger to condense steam, and the heated water after heat exchange is discharged from the steam cooling water outlet 14. One end of the steam cooling water outlet 14 is connected to the water replenishment port, and the other end is connected to the primary fluid inlet of the liquid-liquid gas jet pump 5. The concentrated brine drainage outlet 11 and the non-condensable gas exhaust outlet 17 are respectively connected to the two secondary fluid ports of the liquid-liquid gas jet pump 5.

[0033] Compared with the existing technology, the present invention has the following beneficial effects:

[0034] 1. In order to reduce the overall cost of hydrogen production by electrolysis of water, the present invention proposes a method for replenishing electrolyte water using waste heat from hydrogen production by electrolysis of water. The present invention recovers the heat generated in the electrolysis process through water, and the water evaporates and condenses after heat exchange and temperature increase, thereby providing the electrolyzer with the required supplementary electrolyte. This method can not only reduce the cost of replenishing the electrolyte, but also reduce the energy consumption of the electrolyzer and improve energy utilization efficiency. The water-cooled waste heat recovery system for multiple groups of electrolyzers provided by the present invention adopts a method of separate heat exchange cooling and centralized evaporation and condensation, with high equipment integration and small footprint.

[0035] 2. Under the condition of multiple electrolyzers with fluctuating working conditions, the electrolyte temperature at the inlet of multiple electrolyzers can be stably controlled, and the inlet adjustment of the electrolyzers is not affected by the waste heat recovery process, so the system has high stability. The relatively independent operation mode enables the waste heat recovery device to continue to operate under high-performance conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of a water cooling waste heat recovery system for multiple groups of electrolytic cells of the present invention;

[0037] Names of reference numerals in the accompanying drawings:

[0038] 1. Electrolytic separation device, 2. Water cooler, 3. Water flow regulating valve, 4. Water cooling circulation pump, 5. Liquid-liquid-gas jet pump, 6. Brine drainage flow regulating valve, 7. Non-condensable gas discharge flow regulating valve, 8. Water replenishment regulating valve, 9. Flash steam vaporizer cylinder, 10. Hot water output pipeline, 11. Brine drainage outlet, 12. Cooling water inlet pipeline, 13. Heat exchanger water inlet, 14. Steam cooling water outlet, 15. Heat exchanger, 16. Heat exchanger condensate outlet, 17. Non-condensable gas exhaust outlet, 18. Heat exchanger condensation chamber, 19. Electrolyte delivery pipeline, 20. Electrolyte circulation pipeline. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with embodiments.

[0040] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0041] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0042] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0045] Example

[0046] The water cooling waste heat recovery system of multiple groups of electrolytic cells in this embodiment includes an electrolytic separation device 1, a water electrolytic cooling device and a flash steam evaporation-condensation device;

[0047] The electrolytic separation device 1 comprises a plurality of groups of electrolytic cells;

[0048] The water electrolysis cooling device comprises a water cooler 2, a water flow regulating valve 3, and a water cooling circulation pump 4;

[0049] The flash vaporization-condensation device includes a liquid-liquid-gas jet pump 5, a flash vaporizer cylinder 9, and a heat exchanger 15; the heat exchanger 15 is located above the flash vaporizer cylinder 9; the heat exchanger 15 is used to condense steam, and is provided with a condensed water outlet and a steam inlet, and distilled water is provided by an external water intake end and a water pump draws distilled water.

[0050] The electrolytic separation device 1 is connected to the water electrolytic cooling device through the electrolyte delivery pipeline 19 and the electrolyte circulation pipeline 20, and the water electrolytic cooling device is connected to the flash steam evaporation-condensation device through the hot water output pipeline 10 and the cooling water inlet pipeline 12.

[0051] The electrolyte outputted from the electrolytic separation device 1 enters the water cooler 2 through the electrolyte delivery pipeline 19. The electrolyte after water cooling flows back into the electrolytic separation device 1 through the electrolyte circulation pipeline 20 to circulate and produce hydrogen;

[0052] The water produced by the flash vaporization-condensation device is used as a cooling medium and is powered by a water cooling circulation pump 4 and enters the water cooler 2 through a cooling water inlet pipe 12;

[0053] The heated hot water in the water cooler 2 enters the flash vaporizer cylinder 9 through the hot water output pipeline 10, and the water vaporizes in the flash vaporizer cylinder 9; the water outlet pipeline in each water cooler is connected to the water return main pipe, and is connected to the hot water output pipeline on the flash vaporization-condensation device.

[0054] The steam generated by water vaporization enters the heat exchanger 15 through the steam pipe, exchanges heat with the water entering the heat exchanger water inlet 13 in the heat exchanger condensation chamber 18, so that the steam condenses into condensed water and is discharged from the heat exchanger condensed water outlet 16, and the water heated after heat exchange is discharged from the steam cooling water outlet 14.

[0055] The cooling water inlet pipeline 12 is provided with a water flow regulating valve 3, through which the water flow entering the water cooler 2 is regulated;

[0056] There are multiple water coolers 2 , and each of the water coolers 2 is equipped with an independent water flow regulating valve 3 .

[0057] The electrolytic separation device 1 has a gas-liquid separator. The electrolyte generated by the electrolytic separation device 1 enters the shell side of each water cooler 2 after the flow rate is distributed by the gas-liquid separator. The water flowing out of the flash vaporization-condensation device enters the tube side of each water cooler 2 through a water cooling circulation pump, and the two perform heat exchange.

[0058] The water temperature in the flash vaporizer cylinder 9 is greater than the saturated steam temperature of the water under the pressure in the flash vaporizer cylinder 9 so that the water can be vaporized.

[0059] The flash vaporizer shell 9 is directly connected to the heat exchanger condensation chamber 18 .

[0060] The steam cooling water discharged from the steam cooling water outlet 14 enters the liquid-liquid-gas jet pump 5 and serves as the primary fluid of the liquid-liquid-gas jet pump 5 to eject non-condensable gas through the non-condensable gas exhaust outlet 17 and concentrated brine through the concentrated brine drainage outlet 11 to be discharged into the environment.

[0061] A non-condensable gas exhaust flow regulating valve 7 is provided on the pipeline corresponding to the non-condensable gas exhaust outlet 17 to adjust the non-condensable gas exhaust flow;

[0062] A brine drainage flow regulating valve 6 is provided on the pipeline corresponding to the brine drainage outlet 11 to adjust the brine drainage volume;

[0063] The flash steam vaporizer cylinder 9 is also provided with a water replenishment pipeline, and the water replenishment pipeline is provided with a water replenishment regulating valve 8 to adjust the water replenishment amount. The brine drainage flow regulating valve 6, the non-condensable gas discharge flow regulating valve 7, and the water replenishment regulating valve 8 are used to control the water level and the vacuum degree in the device, so that the waste heat recovery part is in a high-performance state.

[0064] At the same time, in conjunction with the water flow regulating valve 3, the entire multi-electrolyzer electrolysis system is in a high energy efficiency state, thereby improving the overall system's ability to resist fluctuations and energy utilization.

[0065] Preferably, water at normal temperature enters the condensation chamber 18 of the heat exchanger to condense steam, and the heated water after heat exchange is discharged from the steam cooling water outlet 14. One end of the steam cooling water outlet 14 is connected to the water replenishment port, and the other end is connected to the primary fluid inlet of the liquid-liquid gas jet pump 5. The concentrated brine drainage outlet 11 and the non-condensable gas exhaust outlet 17 are respectively connected to the two secondary fluid ports of the liquid-liquid gas jet pump 5.

[0066] Combine the following Figure 1 A specific implementation scheme is proposed to the present invention:

[0067] The present invention provides a water cooling waste heat recovery system for multiple groups of electrolyzers in the electrolysis of water to produce hydrogen, which system consists of a water electrolysis cooling device and a flash steam condensation device. The upper end is an electrolysis separation device 1, wherein the water electrolysis cooling device includes a water cooler 2, a water flow regulating valve 3, and a water cooling circulation pump 4. The water electrolysis cooling device is connected to the flash steam condensation device by a hot water output pipeline 10 and a cooling water inlet pipeline 12, so that water enters the tank body and evaporates into steam. The flash steam condensation device includes a liquid-liquid gas jet pump 5, a concentrated brine drainage flow regulating valve 6, a non-condensable gas discharge flow regulating valve 7, a water replenishment regulating valve 8, a flash steam condenser cylinder 9, a hot water output pipeline 10, a concentrated brine drainage outlet 11, a cooling water inlet pipeline 12, a heat exchanger water inlet 13, a steam cooling water outlet 14, a heat exchanger 15, a heat exchanger condensation water outlet 16, a non-condensable gas exhaust outlet 17, and a heat exchanger condensation chamber 18. The flash vaporizer cylinder 9 is directly connected to the heat exchanger condensation chamber 18. The water discharged from the heat exchanger condensate outlet is accumulated in the condensation device and is extracted by the external water taking end. The concentrated brine drainage outlet 11, the steam cooling water outlet 14, and the non-condensable gas exhaust outlet 17 are respectively equipped with regulating valves, concentrated brine drainage flow regulating valve 5, water replenishment regulating valve 8, non-condensable gas exhaust flow regulating valve 7, and liquid-liquid gas jet pump 5. The liquid-liquid gas jet pump 5 discharges the water to the external environment.

[0068] Combine the following Figure 1 The working principle of the present invention is described:

[0069] The upper electrolytic separation device 1 inputs electrolyte into the seawater cooler 2, and then enters the electrolytic separation device 1 for circulating hydrogen production after being cooled by seawater. The seawater in the seawater cooler 2 is powered by the seawater cooling circulation pump 4 to enter the seawater cooling system. Different electrolytic cells need to use the seawater flow regulating valve 3 to adjust the appropriate cooling seawater flow. The heated seawater in each pipeline enters the flash vaporizer cylinder 9 from the hot seawater output pipeline 10. In the device, the seawater temperature is greater than the saturated steam temperature corresponding to the pressure in the device, and the seawater vaporizes. Steam enters the heat exchanger 15 from the steam pipeline, and heat exchanges with the seawater entering the heat exchanger seawater inlet 13 in the heat exchanger condensation chamber 18, so that the steam condenses into condensed water and is discharged from the heat exchanger condensed water outlet 16 and stored in the device. The normal temperature seawater after heat exchange is discharged from the steam cooling seawater outlet 14, and as the primary fluid of the liquid-liquid gas jet pump 5, it ejects the non-condensable gas exhaust outlet 17 and the concentrated brine drainage outlet 11 to discharge the environment. A seawater replenishment pipeline is set in the pipeline to enter the flash vaporizer cylinder 9. The regulating valves, concentrated brine drainage flow regulating valve 6, non-condensable gas discharge flow regulating valve 7, and seawater replenishment regulating valve 8 are used to control the water level and vacuum degree in the device, so that the waste heat recovery part is in a high-performance state. At the same time, in conjunction with the seawater flow regulating valve 3, the entire multi-electrolyzer electrolysis system is in a high-efficiency state, improving the overall system's ability to resist fluctuations and energy utilization.

Claims

1. A seawater cooling waste heat recovery system for multiple groups of electrolytic cells, characterized in that: The system comprises an electrolytic separation device (1), a water electrolytic cooling device and a flash vaporization-condensation device; The electrolytic separation device (1) comprises a plurality of electrolytic cells; The water electrolysis cooling device comprises a water cooler (2), a water flow regulating valve (3), and a water cooling circulation pump (4); The flash vaporization-condensation device comprises a liquid-liquid-gas jet pump (5), a flash vaporizer cylinder (9), and a heat exchanger (15); the heat exchanger (15) is located above the flash vaporizer cylinder (9); The electrolytic separation device (1) is connected to the water electrolytic cooling device via an electrolyte delivery pipeline (19) and an electrolyte circulation pipeline (20), and the water electrolytic cooling device is connected to the flash steam evaporation-condensation device via a hot water output pipeline (10) and a cooling water inlet pipeline (12).

2. The system according to claim 1, characterized in that The electrolyte outputted from the electrolytic separation device (1) enters the water cooler (2) through the electrolyte delivery pipeline (19), and the electrolyte after water cooling flows back through the electrolyte circulation pipeline (20) into the electrolytic separation device (1) to circulate and produce hydrogen; The water produced by the flash steam evaporation-condensation device is used as a cooling medium and is powered by a water cooling circulation pump (4) and enters the water cooler (2) through a cooling water inlet pipeline (12); The hot water heated in the water cooler (2) enters the flash vaporizer cylinder (9) through the hot water output pipeline (10), and the water vaporizes in the flash vaporizer cylinder (9); Steam generated by water vaporization enters the heat exchanger (15) through the steam pipe, and exchanges heat with water entering through the heat exchanger water inlet (13) in the heat exchanger condensation chamber (18), so that the steam condenses into condensed water and is discharged from the heat exchanger condensed water outlet (16). The water heated after the heat exchange is discharged from the steam cooling water outlet (14).

3. The system according to claim 2, characterized in that A water flow regulating valve (3) is provided on the cooling water inlet pipeline (12), and the water flow rate entering the water cooler (2) is regulated by the water flow regulating valve (3).

4. The system according to claim 3, characterized in that There are multiple water coolers (2), and each of the water coolers (2) is equipped with an independent water flow regulating valve (3).

5. The system according to claim 4, characterized in that The electrolytic separation device (1) has a gas-liquid separator. The electrolyte generated by the electrolytic separation device (1) enters the shell side of each water cooler (2) after the flow rate is distributed by the gas-liquid separator. The water flowing out of the flash vaporization-condensation device enters the tube side of each water cooler (2) through a water cooling circulation pump, and the two perform heat exchange.

6. The system according to claim 5, characterized in that The water temperature in the flash vaporizer cylinder (9) is greater than the saturated steam temperature of the water under the pressure inside the flash vaporizer cylinder (9), so that the water vaporizes.

7. The system according to claim 6, characterized in that The flash vaporizer barrel (9) is directly connected to the heat exchanger condensation chamber (18).

8. The system according to claim 7, characterized in that The steam cooling water discharged from the steam cooling water outlet (14) enters the liquid-liquid gas jet pump (5) and serves as the primary fluid of the liquid-liquid gas jet pump (5), thereby ejecting non-condensable gas through the non-condensable gas exhaust outlet (17) and concentrated brine through the concentrated brine drainage outlet (11) to the environment.

9. The system according to claim 8, characterized in that A non-condensable gas discharge flow rate regulating valve (7) is provided on the pipeline corresponding to the non-condensable gas exhaust outlet (17) to regulate the non-condensable gas discharge flow rate; A brine drainage flow regulating valve (6) is provided on the pipeline corresponding to the brine drainage outlet (11) to adjust the brine drainage volume; The flash steam vaporizer cylinder (9) is also provided with a water replenishment pipeline, and the water replenishment pipeline is provided with a water replenishment regulating valve (8) for regulating the water replenishment amount.

10. The system according to claim 9, characterized in that Normal temperature water enters the condensation chamber (18) of the heat exchanger to condense steam. The water heated after heat exchange is discharged from the steam cooling water outlet (14). One end of the steam cooling water outlet (14) is connected to the water replenishment port, and the other end is connected to the primary fluid inlet of the liquid-liquid gas jet pump (5). The concentrated brine drainage outlet (11) and the non-condensable gas exhaust outlet (17) are respectively connected to the two secondary fluid ports of the liquid-liquid gas jet pump (5).

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