System for producing hydrogen by electrolyzing water through industrial waste heat

Abstract

The embodiment of the invention provides a system for producing hydrogen by electrolyzing water by using industrial waste heat. The system comprises a hydrogen production device, wherein the hydrogen production device comprises an electrolytic bath, a waste heat exchange device, a waste heat conduction device, a temperature monitoring device, a cooling device and a control device; the waste heat exchange device, the waste heat conduction device and the electrolytic cell are sequentially connected, and the waste heat exchange device is used for being connected with industrial production equipment and obtaining industrial waste heat; the waste heat conduction device is used for conducting waste heat obtained by the waste heat exchange device to the electrolytic bath; the temperature monitoring device and the cooling device are connected and are respectively arranged in the electrolytic bath, the temperature monitoring device is used for monitoring and adjusting the temperature of the electrolytic bath, and the cooling device is used for cooling the electrolytic bath; the control device is electrically connected with the waste heat exchange device, the waste heat conduction device and the temperature monitoring device. The control device is used for controlling operation of the waste heat exchange device, the waste heat conduction device and the temperature monitoring device.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of hydrogen production by electrolysis, and specifically relate to a system for producing hydrogen by electrolyzing water using industrial waste heat. Background Art

[0002] Water electrolysis is a process that splits water molecules into hydrogen and oxygen. The process requires the use of electrical energy to split water molecules, producing hydrogen and oxygen, as well as a large amount of heat.

[0003] Traditional water electrolysis methods consume a lot of electricity, resulting in energy waste. At the same time, the waste heat generated by many industrial processes has not been effectively utilized, wasting renewable thermal energy resources.

[0004] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a system for producing hydrogen by electrolyzing water using industrial waste heat.

[0006] One aspect of an embodiment of the present disclosure provides a system for producing hydrogen by electrolyzing water using industrial waste heat, comprising: the hydrogen production device comprises an electrolytic cell, a waste heat exchange device, a waste heat conduction device, a temperature monitoring device, a cooling device, and a control device;

[0007] The waste heat exchange device, the waste heat conduction device and the electrolytic cell are connected in sequence, the waste heat exchange device is used to be connected to industrial production equipment to obtain industrial waste heat; the waste heat conduction device is used to conduct the waste heat obtained by the waste heat exchange device to the electrolytic cell;

[0008] The temperature monitoring device is connected to the cooling device and is respectively arranged in the electrolytic cell, the temperature monitoring device is used to monitor and adjust the temperature of the electrolytic cell, and the cooling device is used to cool the electrolytic cell;

[0009] The control device is electrically connected to the waste heat exchange device, the waste heat conduction device and the temperature monitoring device respectively, and the control device is used to control the operation of the waste heat exchange device, the waste heat conduction device and the temperature monitoring device.

[0010] Optionally, the operating temperature range of the electrolytic cell is 40°C-90°C, the operating voltage range of the electrolytic cell of the electrolytic cell is 1.8V-2.2V, and the operating current density range of the electrolytic cell is 1000A / m 2 -10000A / m 2 .

[0011] Optionally, the waste heat exchange device includes a plate heat exchanger, a shell and tube heat exchanger or a heat pipe heat exchanger; the processing temperature of the waste heat exchange device is 100°C-500°C.

[0012] Optionally, the waste heat conduction device includes a heat transfer pipe, a circulation pump and a heat medium structure, the heat transfer pipe is arranged between the waste heat exchange device and the electrolytic cell; the heat medium structure is used for heat exchange with the waste heat exchange device; the circulation pump is used to pump the heat medium in the heat medium structure to the electrolytic cell so that the heat medium heats the electrolytic cell.

[0013] Optionally, the heat medium includes water, steam or heat transfer oil; the thermal conductivity of the heat transfer oil is 0.12W / m·K; and the steam working pressure is 0.1MPa-1.0Mpa.

[0014] Optionally, the temperature monitoring device includes a temperature sensor, a controller and a regulating valve; the cooling device includes a cooling water pipeline and a radiator;

[0015] The temperature sensor is arranged in the electrolytic cell, and the temperature sensor is used to detect the temperature of the electrolytic cell; the regulating valve is arranged in the cooling water pipeline, and the controller is electrically connected to the temperature sensor and the regulating valve respectively, and the controller is used to control the opening of the regulating valve according to the temperature detected by the temperature sensor, so as to control the flow rate of the cooling water pipeline;

[0016] The cooling water pipeline is connected to the electrolytic cell and the radiator respectively, and is used to guide the coolant to flow through the electrolytic cell for heat exchange, and transport the heated coolant to the radiator for cooling.

[0017] Optionally, the temperature sensor has an accuracy error of ±0.5°C and a measurement range of 0°C-300°C; the controller includes a PID controller; the regulating valve includes an electric regulating valve with a control accuracy of ±2%;

[0018] The radiator comprises a fin tube radiator, and the cooling capacity of the radiator is 1kW-10kW.

[0019] Furthermore, it also includes: a heat preservation device, which is arranged on the periphery of the electrolytic cell and the waste heat conduction device and is used to keep the electrolytic cell and the waste heat conduction device warm.

[0020] Optionally, the material of the thermal insulation device includes rock wool or ceramic fiber.

[0021] Furthermore, it also includes: a safety device, which is connected to the electrolytic cell and the waste heat conduction device respectively, and the safety device is used to detect the temperature and pressure of the electrolytic cell and the waste heat conduction device.

[0022] The beneficial effects of the embodiments of the present disclosure include:

[0023] The present disclosure utilizes industrial waste heat from industrial production equipment to heat water in an electrolyzer, thereby reducing the power consumption of water electrolysis. By collecting and utilizing waste heat from industrial processes, the energy consumption of water electrolysis can be greatly reduced, thereby reducing energy waste. The present disclosure is applicable to water electrolysis production processes of various scales, and can be used in industrial production, laboratory research, and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic structural diagram of a system for producing hydrogen by electrolyzing water using industrial waste heat according to an embodiment of the present invention.

[0025] In the figure, 110, electrolytic cell; 120, waste heat exchange device; 130, waste heat conduction device; 140, temperature monitoring device; 150, cooling device; 160, safety device; 170, control device. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the error tolerance range. "Parallel" is not parallel in the strict sense, but within the error tolerance range.

[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] like Figure 1 As shown, a system for producing hydrogen by electrolyzing water using industrial waste heat includes: a hydrogen production device including an electrolytic cell 110, a waste heat exchange device 120, a waste heat conduction device 130, a temperature monitoring device 140, a cooling device 150 and a control device 170.

[0030] The waste heat exchange device 120 , the waste heat conduction device 130 and the electrolytic cell 110 are connected in sequence. The waste heat exchange device 120 is used to be connected to industrial production equipment to obtain industrial waste heat, and the waste heat conduction device 130 is used to conduct the waste heat obtained by the waste heat exchange device 120 to the electrolytic cell 110 .

[0031] The temperature monitoring device 140 is connected to the cooling device 150 and is respectively disposed in the electrolytic cell 110 . The temperature monitoring device 140 is used to monitor and adjust the temperature of the electrolytic cell 110 , and the cooling device 150 is used to cool the electrolytic cell 110 .

[0032] The control device 170 is electrically connected to the waste heat exchange device 120 , the waste heat conduction device 130 and the temperature monitoring device 140 , respectively, and is used to control the operation of the waste heat exchange device 120 , the waste heat conduction device 130 and the temperature monitoring device 140 .

[0033] The present disclosure utilizes industrial waste heat from industrial production equipment to heat water in the electrolyzer 110, thereby reducing the power consumption of water electrolysis. By collecting and utilizing waste heat from industrial processes, the energy consumption of water electrolysis can be greatly reduced, thereby reducing energy waste. The present disclosure is applicable to water electrolysis production processes of various scales, and can be used in industrial production, laboratory research, and other fields.

[0034] In some embodiments, the industrial production equipment includes a boiler room of a power plant, a drying production line of a food processing plant, or a fertilizer plant.

[0035] In some embodiments, the operating temperature range of the electrolytic cell 110 is 40° C.-90° C., the operating voltage range of the electrolytic cell of the electrolytic cell 110 is 1.8 V-2.2 V, and the operating current density range of the electrolytic cell 110 is 1000 A / m 2 -10000A / m 2 .

[0036] In some embodiments, the waste heat exchange device 120 includes a plate heat exchanger, a shell and tube heat exchanger, or a heat pipe heat exchanger, and the processing temperature of the waste heat exchange device 120 is 100°C-500°C.

[0037] In some embodiments, the waste heat transfer device 130 includes a heat transfer pipe, a circulation pump and a heat medium structure, and the heat transfer pipe is arranged between the waste heat exchange device 120 and the electrolytic cell 110. The heat medium structure is used to perform heat exchange with the waste heat exchange device 120, and the circulation pump is used to pump the heat medium in the heat medium structure to the electrolytic cell 110, so that the heat medium heats the electrolytic cell 110.

[0038] In some embodiments, the heat medium includes water, steam or heat transfer oil, the thermal conductivity of the heat transfer oil is 0.12 W / m·K, and the steam working pressure is 0.1 MPa-1.0 MPa.

[0039] In some embodiments, the temperature monitoring device 140 includes a temperature sensor, a controller, and a regulating valve, and the cooling device 150 includes a cooling water pipeline and a radiator.

[0040] A temperature sensor is disposed in the electrolytic cell 110, and the temperature sensor is used to detect the temperature of the electrolytic cell 110. A regulating valve is disposed in the cooling water pipeline. A controller is electrically connected to the temperature sensor and the regulating valve respectively. The controller is used to control the opening of the regulating valve according to the temperature detected by the temperature sensor to control the flow of the cooling water pipeline.

[0041] The cooling water pipeline is connected to the electrolytic cell 110 and the radiator respectively. The cooling water pipeline is used to guide the coolant to flow through the electrolytic cell 110 for heat exchange and transport the heated coolant to the radiator for cooling.

[0042] In some embodiments, the temperature sensor has an accuracy error of ±0.5°C, a measurement range of 0°C-300°C, the controller includes a PID controller, the regulating valve includes an electric regulating valve, and the control accuracy is ±2%.

[0043] The radiator includes a fin tube radiator, and the cooling capacity of the radiator is 1kW-10kW.

[0044] In some embodiments, the hydrogen production system further includes a heat preservation device, which is disposed on the periphery of the electrolytic cell 110 and the waste heat conduction device 130 to keep the electrolytic cell 110 and the waste heat conduction device 130 warm.

[0045] In some embodiments, the material of the thermal insulation device includes rock wool or ceramic fiber.

[0046] In some embodiments, the hydrogen production system further includes a safety device 160 , which is connected to the electrolytic cell 110 and the waste heat conduction device 130 , respectively, and is used to detect the temperature and pressure of the electrolytic cell 110 and the waste heat conduction device 130 .

[0047] An example provided by the present disclosure includes:

[0048] The present invention provides a system for reducing the power consumption of hydrogen production by electrolysis of water using industrial waste heat, and the system comprises the following components:

[0049] 1. Electrolyzer 110: used to electrolyze water to generate hydrogen and oxygen. Electrolyzer 110 has an anode and a cathode, which are connected to the positive and negative electrodes of a DC power source, respectively, to decompose water by DC power.

[0050] The electrolytic cell 110 includes a cell body and a cathode and an anode disposed in the cell body. The electrolytic cell 110 is connected to the positive electrode and the negative electrode of the power supply via its cathode and anode.

[0051] The electrolytic cell 110 is made of corrosion-resistant materials, including stainless steel, titanium alloy or nickel alloy.

[0052] Operating Temperature: The operating temperature range of the electrolyzer 110 is 40° C. to 90° C. This temperature range allows the system to effectively utilize waste heat from industrial processes, reducing the need for additional heating, thereby saving energy.

[0053] Voltage Range: The operating voltage of a single cell of the electrolyzer 110 is between 1.8 V and 2.2 V. The lower voltage requirement means that the system can be operated at a lower energy cost, thereby reducing the cost of hydrogen production.

[0054] Current density: The working current density of electrolytic cell 110 is 1000A / m 2 Up to 10000A / m 2 A higher current density can increase the hydrogen production rate, allowing more hydrogen to be produced per unit time.

[0055] 2. Waste heat exchange device 120: connected to industrial production equipment to obtain industrial waste heat. The waste heat exchange device 120 includes a plate heat exchanger, a shell and tube heat exchanger or a heat pipe heat exchanger, and the specific selection depends on the nature and temperature of the industrial waste heat.

[0056] Heat exchange efficiency: The heat exchange efficiency of the waste heat exchange device 120 reaches more than 85%. High heat exchange efficiency means that more industrial waste heat can be effectively utilized, reducing energy waste and improving energy utilization efficiency.

[0057] Material: The heat exchange device is made of high temperature resistant and corrosion resistant materials, such as stainless steel or alloy materials. The use of stainless steel or alloy materials can ensure that the heat exchange device can operate stably for a long time in high temperature and corrosive environments, extending the service life of the equipment.

[0058] Temperature range: The heat exchange device can process temperatures between 100°C and 500°C. The wide processing temperature range enables the heat exchange device to be used for waste heat recovery in a variety of industrial processes, enhancing the flexibility and adaptability of the system.

[0059] 3. Waste heat transfer device 130: used to transfer the waste heat obtained by the waste heat exchange device 120 to the electrolytic cell 110. The waste heat transfer device 130 includes a heat transfer pipe, a circulation pump and a heat medium structure (the heat medium structure includes heat media such as water, steam or heat transfer oil), ensuring that the waste heat can be efficiently transferred to the electrolytic cell 110.

[0060] Material of heat transfer pipe: copper pipe or stainless steel pipe, the pipe diameter is determined according to the system design.

[0061] Circulation pump: Choose a high temperature and corrosion resistant circulation pump with a flow range of 1m 3 / h to 10m 3 / h. The high temperature and corrosion resistant circulation pump can continue to work in harsh environments, reduce failures caused by pump material problems, and ensure continuous operation of the system. The flow range is from 1m 3 / h to 10m 3 / h means that the circulation volume can be adjusted according to actual needs, which is suitable for systems of different sizes and increases the flexibility of the system.

[0062] Heat transfer medium: high temperature thermal oil (working temperature 150℃ to 300℃) or hot water (working temperature 40℃ to 100℃). Choosing high temperature thermal oil or hot water as the heat transfer medium can meet the heat exchange requirements in different temperature ranges, allowing the system to adapt to more diverse application scenarios. High temperature thermal oil has good thermal stability at higher temperatures and can maintain good heat transfer performance at high temperatures; hot water provides stable heat transfer in a lower temperature range, and both can effectively improve heat exchange efficiency.

[0063] Heat medium: the medium used to transfer waste heat. Different heat media can be selected according to the temperature of industrial waste heat, such as heat transfer oil for high temperature, steam for medium temperature, and water for low temperature.

[0064] High temperature heat transfer oil: thermal conductivity 0.12W / m·K, operating temperature 150℃ to 300℃. Heat transfer oil working at high temperature has good thermal stability, which means that it can maintain its physical and chemical properties unchanged in high temperature environment and will not easily decompose or deteriorate. Within the specified operating temperature range, heat transfer oil can effectively transfer heat, especially in the medium and high temperature range.

[0065] Steam: Saturated steam, pressure 0.1MPa to 1.0MPa. Different pressure ranges allow the system to adjust the steam pressure according to actual needs to adapt to different heat load requirements. As a heat carrier, saturated steam has good heat transfer properties and can quickly transfer heat.

[0066] Hot water: temperature range 40℃ to 100℃. Hot water covers a wide temperature range and can meet the needs of different applications, such as preheating, heating, etc. As a relatively cheap and easily available heat source, hot water can reduce the operating cost of the system.

[0067] 4. Temperature monitoring device 140: used to monitor and adjust the temperature of the electrolytic cell 110. It includes a temperature sensor, a controller and a regulating valve to ensure that the temperature of the electrolytic cell 110 is maintained within a set range to improve the electrolysis efficiency.

[0068] Temperature sensor: accuracy ±0.5℃, measuring range 0℃ to 300℃. The accuracy of ±0.5℃ means that the temperature sensor can provide very accurate temperature readings, which is critical for processes that require strict temperature control. The measuring range of 0℃ to 300℃ covers application scenarios from low temperature to high temperature, making the sensor suitable for a variety of industrial environments.

[0069] Controller: PID controller, used to precisely regulate temperature. The PID (Proportional-Integral-Derivative) controller can automatically adjust the control quantity according to the deviation between the set value and the actual measured value to achieve precise temperature control.

[0070] Control valve: Electric control valve, temperature resistance 150℃ to 300℃, control accuracy ±2%. The electric control valve can work normally in the temperature range of 150℃ to 300℃ and is suitable for high temperature environment. The control accuracy of ±2% means that the control valve can control the fluid flow very finely, thereby achieving precise temperature regulation.

[0071] Insulation device: The insulation device is made of insulation material, which covers the outside of the electrolytic cell 110 and the waste heat conduction system to reduce heat loss and improve thermal energy utilization efficiency.

[0072] Material Type: Rockwool or Ceramic Fiber.

[0073] Thermal insulation performance: thermal conductivity is less than 0.04W / m·K.

[0074] Operating temperature range: -40℃ to 300℃.

[0075] 5. Cooling device 150: used to cool the electrolytic cell 110 to prevent overheating. The cooling device 150 may include a cooling water pipeline and a radiator to ensure that the electrolytic cell 110 operates within a safe temperature range.

[0076] Cooling water pipe material: stainless steel or PVC material, the pipe diameter is determined according to the system design.

[0077] Radiator: Finned tube radiator, cooling capacity from 1kW to 10kW. The range of cooling capacity from 1kW to 10kW means that the radiator can adapt to different cooling needs, whether it is a small device or a large industrial system.

[0078] Cooling water temperature: 5℃ to 25℃.

[0079] 6. Safety device 160: including a pressure sensor, a temperature sensor and an alarm device, which are used to monitor the operating status of the electrolytic cell 110 and the waste heat transfer device 130, detect and handle abnormal situations in time, and ensure safe and reliable operation of the system.

[0080] Pressure sensor: range 0 to 1.6MPa, accuracy ±1%.

[0081] Temperature sensor: accuracy ±0.5℃, measuring range 0℃ to 300℃.

[0082] Alarm device: Sound and light alarm, alarm response time is less than 1 second.

[0083] 7. Control device 170: The control device 170 is used to coordinate the operation of the waste heat exchange device 120, the waste heat conduction device 130, the temperature monitoring device 140 and the safety device 160, realize automatic control, and improve the stability and efficiency of the system operation. The control device 170 is connected to the waste heat exchange device 120, the waste heat conduction device 130, the temperature monitoring device 140 and the safety device 160 through a communication protocol, and has a data storage function. The control device 170 includes a PLC controller with a touch screen human-machine interface.

[0084] Communication protocol: MODBUS, Profibus or Ethernet protocol.

[0085] Data storage: It has data recording and storage functions, with a storage capacity of at least 10GB.

[0086] 8. Data acquisition and analysis device: used to monitor and record the operating data of the hydrogen production system in real time, conduct data analysis and optimization adjustments, and improve the operating efficiency and stability of the system. It includes data acquisition module, data storage module and data analysis module.

[0087] Data acquisition module: multi-channel data acquisition card, sampling rate 1Hz to 100Hz.

[0088] Data storage module: industrial-grade solid-state hard drive, with a capacity of more than 128GB.

[0089] Data analysis module: embedded analysis software, supporting real-time data analysis and historical data playback.

[0090] Specific examples provided by the present disclosure include:

[0091] Embodiment 1:

[0092] In a boiler room of a power plant, the high-temperature steam generated passes through a shell-and-tube heat exchanger to transfer heat to the heat transfer oil. The heat transfer oil is transported to the outer jacket of the electrolyzer 110 through a heat transfer pipe, so that the temperature of the electrolyzer 110 is maintained at 80°C. In this way, the power consumption of hydrogen production by electrolyzing water can be greatly reduced.

[0093] The specific steps are as follows:

[0094] The high-temperature steam generated in the boiler room of the power plant is introduced into the shell and tube heat exchanger, and the heat is transferred to the heat transfer oil of the waste heat transfer device 130 through the heat exchanger.

[0095] The heat transfer oil is transported to the outer jacket of the electrolytic cell 110 through the heat transfer pipe and circulates to ensure that the temperature of the electrolytic cell 110 is stabilized at 80°C.

[0096] In the electrolytic cell 110, water is decomposed into hydrogen and oxygen during the electrolysis process. As the temperature of the electrolytic cell 110 increases, the electrolysis efficiency increases and the required electrical energy decreases.

[0097] Embodiment 2:

[0098] In a drying production line of a food processing plant, the medium-temperature exhaust gas is passed through a plate heat exchanger to transfer heat to water to form high-temperature hot water. The high-temperature hot water is transported to the outer jacket of the electrolyzer 110 through a heat-conducting pipe, raising the temperature of the electrolyzer 110 to 60°C, thereby reducing the power consumption of hydrogen production by electrolyzing water.

[0099] The specific steps are as follows:

[0100] The medium-temperature exhaust gas generated by the drying production line of the food processing plant is introduced into the plate heat exchanger, and the heat is transferred to the water in the waste heat conduction device 130 through the heat exchanger to form high-temperature hot water.

[0101] The high-temperature hot water is transported to the outer jacket of the electrolytic cell 110 through a heat-conducting pipe and circulated to ensure that the temperature of the electrolytic cell 110 is stabilized at 60°C.

[0102] In the electrolytic cell 110, water is decomposed into hydrogen and oxygen during the electrolysis process. As the temperature of the electrolytic cell 110 increases, the electrolysis efficiency increases and the required electrical energy decreases.

[0103] Embodiment 3:

[0104] During the reaction process of a fertilizer plant, a large amount of medium-temperature waste heat is collected by a heat pipe heat exchanger and transferred to the steam in the waste heat transfer device 130. The steam is transported to the jacket of the electrolyzer 110 through the heat transfer pipe of the waste heat transfer device 130, so that the temperature of the electrolyzer 110 is maintained at 55°C, thereby reducing the energy consumption of hydrogen production by electrolyzing water.

[0105] The specific steps are as follows:

[0106] The waste heat from the reaction process in the fertilizer plant is collected through a heat pipe heat exchanger and transferred to steam.

[0107] The steam is transported to the outer jacket of the electrolytic cell 110 through a heat-conducting pipe and circulated to ensure that the temperature of the electrolytic cell 110 is stabilized at 55°C.

[0108] In the electrolytic cell 110, water is decomposed into hydrogen and oxygen during the electrolysis process. As the temperature of the electrolytic cell 110 increases, the electrolysis efficiency increases and the required electrical energy decreases.

[0109] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A system for producing hydrogen by electrolyzing water using industrial waste heat, characterized in that: The hydrogen production device comprises an electrolyzer, a waste heat exchange device, a waste heat conduction device, a temperature monitoring device, a cooling device and a control device; The waste heat exchange device, the waste heat conduction device and the electrolytic cell are connected in sequence, the waste heat exchange device is used to be connected to industrial production equipment to obtain industrial waste heat; the waste heat conduction device is used to conduct the waste heat obtained by the waste heat exchange device to the electrolytic cell; The temperature monitoring device is connected to the cooling device and is respectively arranged in the electrolytic cell, the temperature monitoring device is used to monitor and adjust the temperature of the electrolytic cell, and the cooling device is used to cool the electrolytic cell; The control device is electrically connected to the waste heat exchange device, the waste heat conduction device and the temperature monitoring device respectively, and the control device is used to control the operation of the waste heat exchange device, the waste heat conduction device and the temperature monitoring device.

2. A system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 1, characterized in that: The working temperature range of the electrolytic cell is 40°C-90°C, the working voltage range of the electrolytic chamber of the electrolytic cell is 1.8V-2.2V, and the working current density range of the electrolytic cell is 1000A / m 2 -10000A / m 2 .

3. The system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 1, characterized in that: The waste heat exchange device includes a plate heat exchanger, a shell and tube heat exchanger or a heat pipe heat exchanger; the processing temperature of the waste heat exchange device is 100°C-500°C.

4. The system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 1, characterized in that: The waste heat conduction device includes a heat transfer pipe, a circulation pump and a heat medium structure. The heat transfer pipe is arranged between the waste heat exchange device and the electrolytic cell; the heat medium structure is used for heat exchange with the waste heat exchange device; the circulation pump is used for pumping the heat medium in the heat medium structure to the electrolytic cell so that the heat medium heats the electrolytic cell.

5. A system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 4, characterized in that: The heat medium includes water, steam or heat transfer oil; the thermal conductivity of the heat transfer oil is 0.12W / m·K; the working pressure of the steam is 0.1MPa-1.0Mpa.

6. The system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 1, characterized in that: The temperature monitoring device includes a temperature sensor, a controller and a regulating valve; the cooling device includes a cooling water pipeline and a radiator; The temperature sensor is arranged in the electrolytic cell, and the temperature sensor is used to detect the temperature of the electrolytic cell; the regulating valve is arranged in the cooling water pipeline, and the controller is electrically connected to the temperature sensor and the regulating valve respectively, and the controller is used to control the opening of the regulating valve according to the temperature detected by the temperature sensor, so as to control the flow rate of the cooling water pipeline; The cooling water pipeline is connected to the electrolytic cell and the radiator respectively, and is used to guide the coolant to flow through the electrolytic cell for heat exchange, and transport the heated coolant to the radiator for cooling.

7. A system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 6, characterized in that: The temperature sensor has an accuracy error of ±0.5°C and a measurement range of 0°C-300°C; the controller includes a PID controller; the regulating valve includes an electric regulating valve with a control accuracy of ±2%; The radiator comprises a fin tube radiator, and the cooling capacity of the radiator is 1kW-10kW.

8. The system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 1, characterized in that: Also includes: The heat preservation device is arranged on the periphery of the electrolytic cell and the waste heat conduction device.

9. A system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 8, characterized in that: The material of the heat-insulating device includes rock wool or ceramic fiber, which is used to insulate the electrolytic cell and the waste heat conduction device.

10. The system for producing hydrogen by electrolyzing water using industrial waste heat according to claim 1, characterized in that: Also includes: A safety device is connected to the electrolytic cell and the waste heat conduction device respectively, and is used to detect the temperature and pressure of the electrolytic cell and the waste heat conduction device.

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