PEM electrolytic cell temperature control system, heating device and method

Abstract

The invention discloses a PEM electrolytic cell temperature control system, a heating device and a method. The PEM electrolytic bath temperature control system comprises a data acquisition module which is respectively connected with a circulating cooling water system and an automatic control module and is used for acquiring preset value information and / or real-time operation information of a specific device in the circulating cooling water system; the automatic control module is respectively connected with the circulating cooling water system and the temperature display module and is used for correspondingly controlling the specific device in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific device; and the temperature display module is used for displaying the temperature of a specific device in the circulating cooling water system and a temperature change curve. The method has the technical effects that the temperature rise rate of the electrolytic cell can be increased, the response time is shortened, the temperature of the electrolytic cell is kept more stable, and the system performance is improved.

Description

Technical Field

[0001] The invention relates to the field of electric power technology application, and in particular to a PEM electrolyzer temperature control system, a heating device and a method. Background Art

[0002] With the rapid development of new energy sources such as wind power and photovoltaics, the amount of wind and solar power that cannot be connected to the grid has gradually increased due to their random, intermittent, and volatile characteristics and the limitations of the grid's ability to withstand fluctuating power sources. Using the energy properties and raw material properties of hydrogen, electrolyzing water to produce hydrogen through wind and solar power abandonment is one of the important measures to promote the absorption of abandoned power and deep decarbonization of downstream industries. Among them, proton exchange membrane (PEM) water electrolysis to produce hydrogen is one of the main ways to absorb the fluctuating power of wind and solar power generation due to its fast response to fluctuating power and wide load regulation range.

[0003] The operating temperature, operating pressure, and operating current of the PEM electrolyzer are important parameters that restrict the performance of the hydrogen production system. The current common method for controlling the operating temperature of the PEM electrolyzer is: the hydrogen production system is equipped with a circulating cooling water system. The circulating water is cooled by the cooling system and enters the gas-liquid heat exchanger to absorb heat. Then, the heat of the electrolyzer circulating water is absorbed by the liquid-liquid heat exchanger. The purpose of controlling the electrolyzer temperature is achieved by cooling the circulating water of the electrolyzer; in particular, the opening of the pneumatic valve in the circulating cooling water system is adjusted to control the circulating cooling water flow rate, thereby adjusting the operating temperature of the electrolyzer.

[0004] When operating under low temperature weather conditions and the operating temperature of the electrolyzer needs to be adjusted, the cooling water is circulated, but the circulating water of the electrolyzer will be excessively cooled; even if the opening of the pneumatic valve in the circulating cooling water system is adjusted to a smaller state and the circulating cooling water flow rate is reduced, since the circulating water temperature in the circulating cooling water system is in a low temperature state due to the low temperature environment, the circulating water of the electrolyzer will still be excessively cooled when the cooling water circulates, causing the operating temperature of the electrolyzer to drop rapidly, which often causes the hydrogen production system operating indicators to exceed the standard and trip.

[0005] Currently, no effective solution has been proposed to solve the problem that the operating index of the hydrogen production system exceeds the standard and the system trips due to the operating temperature control of the PEM electrolyzer in a low temperature environment in the prior art. Summary of the invention

[0006] In order to solve the above technical problems, the embodiments of the present invention hope to provide a PEM electrolyzer temperature control system, a heating device and a method, so as to at least solve the problem that the operating indicators of the hydrogen production system exceed the standard and the machine trips due to the operating temperature control of the PEM electrolyzer in a low temperature environment in the prior art.

[0007] The technical solution of the present invention is achieved in this way:

[0008] An embodiment of the present invention provides a heating device, wherein a water inlet of the heating device is connected to the outlet of the tube side of a gas-liquid heat exchanger in a circulating cooling water system, and a water outlet of the heating device is connected to the inlet of the shell side of a liquid-liquid heat exchanger in the circulating cooling water system, comprising: an exhaust port, a pressure relief valve, a water inlet, a valve, a box, a thermometer, a flow meter, a water outlet, a barometer and an electric heating component, wherein the exhaust port is located above the pressure relief valve, the pressure relief valve is located above the box, the barometer is connected to the box, and when the gas pressure in the box detected by the barometer is greater than a set value, the pressure relief valve opens the exhaust port to discharge the gas in the circulating cooling water system; the valve is connected to the water inlet, and is used to control the flow rate of cooling water flowing into the box; the thermometer and the flow meter are connected to the water outlet, and are used to detect the temperature and flow rate of the water outlet; the electric heating component is located in the box, and is used to heat cooling water whose temperature is lower than a threshold value.

[0009] Optionally, the heating device also includes: a liquid level meter, a water collecting tank, a sewage outlet and a water replenishment port, wherein the liquid level meter is connected to the box body to display the liquid level in the box body; when the liquid level in the box body reaches the low liquid level limit, the heating device controls the water replenishment port to start replenishing water; when the liquid level in the box body reaches the high liquid level limit, the heating device controls the water replenishment port to stop replenishing water; one end of the water collecting tank is connected to the drain valve, and the other end of the water collecting tank is connected to the box body through a vertical pipe, which is used to collect moisture mixed with the gas in the pipeline of the barometer; the sewage outlet is located at the bottom of the box body, which is used for draining water during regular water changes; the water replenishment port is located at the cross-sectional area change position of the box body, which is used for replenishing water through the water replenishment port when the liquid level of the box body drops to the low liquid level limit.

[0010] An embodiment of the present invention provides a PEM electrolyzer temperature control system, comprising: a circulating cooling water system, a data acquisition module, an automatic control module and a temperature display module, wherein the data acquisition module is connected to the circulating cooling water system and the automatic control module, respectively, and is used to collect preset value information and / or real-time operation information of specific components in the circulating cooling water system; the automatic control module is connected to the circulating cooling water system and the temperature display module, respectively, and is used to perform corresponding control on specific components in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific components; the temperature display module is used to display the temperature of the specific components in the circulating cooling water system, as well as the temperature change curve.

[0011] Optionally, the specific components in the circulating cooling water system include: at least one or a combination of a cooling system, a first pneumatic valve, a second pneumatic valve, a gas-liquid heat exchanger, an electrolytic cell, a heating device, and a liquid-liquid heat exchanger.

[0012] Further, optionally, the data acquisition module includes: a first data acquisition unit and a second data acquisition unit, wherein the first data acquisition unit is used to obtain the upper and lower limits of the temperature of the electrolytic cell, the upper limit of the tube inlet temperature of the gas-liquid heat exchanger at different flow rates, the upper and lower limits of the shell temperature of the liquid-liquid heat exchanger at different flow rates, the upper and lower limits of the outlet flow of the heating device, and the upper and lower limits of the liquid level of the heating device, and generate preset value information; the second data acquisition unit is used to collect the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the opening of the first pneumatic valve, the real-time flow of the inlet flow measuring instrument of the electrolytic cell, the opening of the second pneumatic valve, the number of starts of the electric heating components in the heating device, the temperature of the electric heating components, the liquid level in the heating device, the air pressure at the top of the box in the heating device, the real-time temperature of the outlet temperature measuring instrument in the heating device, the real-time flow of the outlet flow measuring instrument in the heating device, the real-time temperature of the tube inlet temperature measuring instrument of the gas-liquid heat exchanger, and the number of starts of cooling devices in the cooling system, and generate real-time operation information of specific components in the circulating cooling water system.

[0013] Optionally, the automatic control module is further used to calculate, based on the purity requirements of oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, in combination with the flow rate of the cooling system collected by the second data acquisition unit, to obtain the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger corresponding to the flow rate; the automatic control module is further used to calculate, based on the upper and lower limits of the temperature of the electrolyzer obtained by the first data acquisition unit, in combination with the real-time flow of the inlet flow measuring instrument of the electrolyzer, the real-time temperature of the inlet temperature measuring instrument of the electrolyzer, the real-time temperature of the outlet temperature measuring instrument of the electrolyzer, and the real-time flow of the outlet flow measuring instrument in the heating device, to obtain the upper and lower limits of the shell side inlet temperature of the liquid-liquid heat exchanger; the automatic control module is further used to control the real-time temperature of the tube side inlet of the gas-liquid heat exchanger to be less than the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger by dynamically adjusting the number of cooling device starts and the cooling system flow rate; the automatic control module is further used to control the real-time shell side inlet temperature of the liquid-liquid heat exchanger to be within the range of the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger.

[0014] Optionally, the automatic control module is also used to start the electric heating components in the heating device to increase the inlet temperature of the liquid-liquid heat exchanger when the temperature of the liquid-liquid heat exchanger is controlled to increase, and when the inlet temperature of the liquid-liquid heat exchanger is close to the upper limit of the shell temperature of the liquid-liquid heat exchanger, the number of starts of the electric heating components is dynamically reduced, and at the same time, the cooling system dynamically adjusts the refrigeration under the premise of ensuring the cooling effect of the gas-liquid heat exchanger; when the temperature of the electrolytic cell is controlled to decrease, the number of starts of cooling devices in the cooling system is increased to improve the cooling capacity, and when the real-time inlet temperature of the liquid-liquid heat exchanger is close to the lower limit of the shell temperature of the liquid-liquid heat exchanger, the number of starts of the cooling devices is dynamically reduced, and at the same time, the electric heating components in the heating device dynamically adjust the start and stop of the electric heating components according to the real-time inlet temperature of the liquid-liquid heat exchanger.

[0015] An embodiment of the present invention provides a PEM electrolyzer temperature control method, which is applied to a PEM electrolyzer temperature control system, including: collecting preset value information and / or real-time operation information of specific components in a circulating cooling water system; performing corresponding control on specific components in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific components; and displaying the temperature of the specific components in the circulating cooling water system, as well as a temperature change curve.

[0016] Optionally, collecting preset value information and / or real-time operation information of specific devices in the circulating cooling water system includes: obtaining the upper and lower limits of the temperature of the electrolytic cell, the upper limit of the tube inlet temperature of the gas-liquid heat exchanger at different flow rates, the upper and lower limits of the shell temperature of the liquid-liquid heat exchanger at different flow rates, the upper and lower limits of the outlet flow of the heating device, and the upper and lower limits of the liquid level of the heating device, to generate preset value information; collecting the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the opening of the first pneumatic valve, the real-time flow of the inlet flow measuring instrument of the electrolytic cell, the opening of the second pneumatic valve, the number of electric heating components started in the heating device, the temperature of the electric heating components, the liquid level in the heating device, the air pressure at the top of the box in the heating device, the real-time temperature of the outlet temperature measuring instrument in the heating device, the real-time flow of the outlet flow measuring instrument in the heating device, the real-time temperature of the tube inlet temperature measuring instrument of the gas-liquid heat exchanger, and the number of cooling devices started in the cooling system, to generate real-time operation information of specific devices in the circulating cooling water system.

[0017] Optionally, based on preset value information and / or real-time operation information of specific components, corresponding control is performed on specific components in the circulating cooling water system, including: based on the purity requirements of oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, combined with the flow rate of the cooling system, calculation is performed to obtain the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger corresponding to the flow rate; based on the upper and lower limits of the temperature of the electrolyzer, combined with the real-time flow of the inlet flow measuring instrument of the electrolyzer, the real-time temperature of the inlet temperature measuring instrument of the electrolyzer, the real-time temperature of the outlet temperature measuring instrument of the electrolyzer, and the real-time flow of the outlet flow measuring instrument in the heating device, calculation is performed to obtain the upper and lower limits of the shell side inlet temperature of the liquid-liquid heat exchanger; by dynamically adjusting the number of cooling device startups and the cooling system flow rate, the real-time temperature of the tube side inlet of the gas-liquid heat exchanger is controlled to be less than the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger; the real-time shell side inlet temperature of the liquid-liquid heat exchanger is controlled to be within the range of the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger.

[0018] Further, optionally, controlling the real-time temperature of the shell inlet of the liquid-liquid heat exchanger to be within the range of the upper and lower limits of the shell temperature of the liquid-liquid heat exchanger includes: when the temperature of the electrolytic cell is controlled to increase, starting the electric heating components in the heating device to increase the inlet temperature of the liquid-liquid heat exchanger, and when the inlet temperature of the liquid-liquid heat exchanger approaches the upper limit of the shell temperature of the liquid-liquid heat exchanger, dynamically reducing the number of starts of the electric heating components, and at the same time, the cooling system dynamically adjusts the refrigeration under the premise of ensuring the cooling effect of the gas-liquid heat exchanger; when the temperature of the electrolytic cell is controlled to decrease, increasing the number of starts of cooling devices in the cooling system to improve the cooling capacity, and when the real-time inlet temperature of the liquid-liquid heat exchanger approaches the lower limit of the shell temperature of the liquid-liquid heat exchanger, dynamically reducing the number of starts of the cooling devices, and at the same time, the electric heating components in the heating device dynamically adjust the start and stop of the electric heating components according to the real-time inlet temperature of the liquid-liquid heat exchanger.

[0019] The embodiment of the present invention provides a PEM electrolyzer temperature control system, a heating device and a method, which collect preset value information and / or real-time operation information of specific components in a circulating cooling water system; perform corresponding control on specific components in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific components; and display the temperature of the specific components in the circulating cooling water system, as well as the temperature change curve, thereby increasing the heating rate of the electrolyzer, shortening the response time, and keeping the temperature of the electrolyzer more stable, thereby improving the technical effect of system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1A schematic diagram of a heating device provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a heating device in a circulating cooling water system provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a PEM electrolyzer temperature control system provided by an embodiment of the present invention;

[0024] Figure 4 A schematic flow chart of a PEM electrolyzer temperature control method in a PEM electrolyzer temperature control system provided by an embodiment of the present invention;

[0025] Figure 5 A schematic flow chart of a PEM electrolyzer temperature control method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second" and the like in the specification, claims and drawings of the present invention are used to distinguish different objects rather than to limit a specific order.

[0028] It should also be noted that the following embodiments of the present invention may be executed separately, or in combination with each other, and the embodiments of the present invention do not impose specific limitations on this.

[0029] An embodiment of the present invention provides a heating device, wherein a water inlet of the heating device is connected to a tube outlet of a gas-liquid heat exchanger in a circulating cooling water system, and a water outlet of the heating device is connected to a shell inlet of a liquid-liquid heat exchanger in the circulating cooling water system. Figure 1 A schematic diagram of a heating device provided by an embodiment of the present invention; Figure 1 As shown, the heating device provided in the embodiment of the present application includes:

[0030] Exhaust port 1, pressure relief valve 2, water inlet 3, valve 4, box 5, thermometer 6, flowmeter 7, water outlet 8, barometer 9 and electric heating component 10, wherein the exhaust port 1 is located above the pressure relief valve 2, the pressure relief valve 2 is located above the box 5, the barometer 9 is connected to the box 5, and is used for the pressure relief valve 2 to open the exhaust port to discharge the gas in the circulating cooling water system when the gas pressure in the box 5 detected by the barometer 9 is greater than the set value; the valve 4 is connected to the water inlet 3, and is used for controlling the flow rate of cooling water flowing into the box 5; the thermometer 6 and the flowmeter 7 are connected to the water outlet 8, and are used for detecting the temperature and flow rate of the water outlet 8; the electric heating component 10 is located in the box 5, and is used for heating cooling water whose temperature is lower than the threshold value.

[0031] It should be noted that if Figure 1 As shown, the electric heating component 10 in the embodiment of the present application is composed of N heating components, which is based on the heating device provided in the embodiment of the present application and is not specifically limited.

[0032] Optionally, the heating device provided in the embodiment of the present application further includes: a liquid level meter 11, a water collecting tank 12, a sewage outlet 13 and a water replenishment port 14, wherein the liquid level meter 11 is connected to the box body 5 to display the liquid level in the box body 5; when the liquid level in the box body 5 reaches the low liquid level limit, the heating device controls the water replenishment port 14 to start replenishing water; when the liquid level in the box body 5 reaches the high liquid level limit, the heating device controls the water replenishment port 14 to stop replenishing water; wherein, when the liquid level in the box body of the heating device reaches the low liquid level limit, the water replenishment port 14 starts to replenish water to ensure sufficient circulating water and avoid dry burning of the electric heating component 10 in the box body 5; when the liquid level in the box body 5 reaches the high liquid level limit, the heating device controls the water replenishment port 14 to stop replenishing water, and the remaining volume is convenient for precipitation and temporary storage of gases mixed in the circulating water;

[0033] One end of the water collecting tank 12 is connected to the drain valve, and the other end of the water collecting tank 12 is connected to the box body 5 through a vertical pipe, so as to collect the water mixed in the gas in the pipeline of the barometer 9, so as to reduce the influence of the water on the accuracy of the measuring instrument;

[0034] The drain outlet 13 is located at the bottom of the box body 5 and is used for draining water during regular water changes. Since more impurities will be mixed into the circulating water after the circulating water system has been running for a long time, the drain outlet 13 is used for draining water from the water tank during regular water changes.

[0035] The water replenishment port 14 is located at the cross-sectional area change position of the tank 5, and is used to replenish water through the water replenishment port 14 when the liquid level of the tank 5 drops to the low liquid level limit. Since water consumption occurs during the operation of the circulating water system, water is replenished when the water level is low.

[0036] Specifically, based on Figure 1 , Figure 2 A schematic diagram of a heating device in a circulating cooling water system provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the heating device in the embodiment of the present application can be a heating water tank, wherein a circulating water heating water tank is added to the circulating cooling water system in the embodiment of the present application, and the cooling water inlet temperature of the liquid-liquid heat exchanger is controlled by the temperature control system to solve the problem of over-cooling of the circulating water of the electrolytic cell.

[0037] In the embodiment of the present application, a plurality of electric heating devices (i.e., the electric heating component 10 in the embodiment of the present application) are arranged at the bottom of the heating water tank to heat the cooling water with too low a temperature; a pressure relief valve 2 is arranged at the top of the heating water tank, and the pressure relief valve 2 is in a normally closed state to isolate the air. When the gas pressure in the heating water tank exceeds the set value, the pressure relief valve 2 automatically opens to discharge the mixed gas in the circulating cooling water system through the exhaust port 1. The water inlet 3 of the heating water tank is connected to the outlet of the tube side of the gas-liquid heat exchanger, and the water outlet 8 of the heating water tank is connected to the shell side inlet of the liquid-liquid heat exchanger.

[0038] like Figure 2 As shown, the circulating cooling water system includes: a cooling system, a pneumatic valve 1, a temperature measuring instrument T3 for the water inlet of the pipe side of the gas-liquid heat exchanger, a gas-liquid heat exchanger, a gas-liquid separator, a heating water tank, a temperature measuring instrument T4 for the water outlet of the heating water tank, a flow measuring instrument L2 for the water outlet of the heating water tank, a liquid-liquid heat exchanger, a pneumatic valve 2, a circulating pump 1, a circulating pump 2, an electrolytic cell, a flow measuring instrument L1 for the inlet of the electrolytic cell, a temperature measuring instrument T1 for the outlet of the electrolytic cell, and a temperature measuring instrument T2 for the inlet of the electrolytic cell, wherein:

[0039] Electrolyzer, used to separate oxygen and hydrogen, such as Figure 2 As shown, oxygen is recorded as O2 and hydrogen is recorded as H2; wherein, a temperature measuring instrument T1 is provided at the outlet of the electrolytic cell;

[0040] A gas-liquid separator is connected to the electrolytic cell, the gas-liquid heat exchanger and the circulation pump 1 respectively, and is used for gas-liquid separation;

[0041] One end of the gas-liquid heat exchanger is connected to one end of the temperature measuring instrument T3 at the water inlet of the tube side of the gas-liquid heat exchanger, and the other end of the gas-liquid heat exchanger is connected to the water inlet 3 of the heating water tank;

[0042] The other end of the temperature measuring instrument T3 at the water inlet of the tube side of the gas-liquid heat exchanger is connected to one end of the cooling system, the other end of the cooling system is connected to one end of the circulation pump 2, and the other end of the circulation pump 2 is connected to one end of the liquid-liquid heat exchanger;

[0043] The other end of the liquid-liquid heat exchanger is respectively connected to the circulation pump 1 and the water outlet 8 of the heating water tank, wherein the water outlet 8 is provided with a temperature measuring instrument T4 and a flow measuring instrument L2; one end of the liquid-liquid heat exchanger is also connected to one end of the pneumatic valve 1, and the other end of the pneumatic valve 1 is connected to the flow measuring instrument L1 and the temperature measuring instrument T2 at the inlet of the electrolytic cell.

[0044] An embodiment of the present invention provides a heating device, which is connected to the outlet of the gas-liquid heat exchanger tube in the circulating cooling water system through the water inlet of the heating device, and the water outlet of the heating device is connected to the inlet of the liquid-liquid heat exchanger shell in the circulating cooling water system. The exhaust port is located above the pressure relief valve, and the pressure relief valve is located above the box body. The barometer is connected to the box body, and when the gas pressure in the box body detected by the barometer is greater than the set value, the pressure relief valve opens the exhaust port to discharge the gas in the circulating cooling water system; the valve is connected to the water inlet, and is used to control the flow rate of cooling water flowing into the box body; the thermometer and the flow meter are connected to the water outlet, and are used to detect the temperature and flow rate of the water outlet; the electric heating component is located in the box body, and is used to heat the cooling water whose temperature is lower than the threshold, so as to increase the heating rate of the electrolytic cell, shorten the response time, and keep the temperature of the electrolytic cell more stable, thereby improving the technical effect of system performance.

[0045] The embodiment of the present invention provides a PEM electrolyzer temperature control system. Figure 3 A schematic diagram of a PEM electrolyzer temperature control system provided by an embodiment of the present invention; Figure 3 As shown, the PEM electrolyzer temperature control system provided in the embodiment of the present application includes:

[0046] A circulating cooling water system 32, a data acquisition module 34, an automatic control module 36 and a temperature display module 38, wherein the data acquisition module 34 is respectively connected to the circulating cooling water system 32 and the automatic control module 36, and is used to collect preset value information and / or real-time operation information of specific components in the circulating cooling water system 32; the automatic control module 36 is respectively connected to the circulating cooling water system 32 and the temperature display module 38, and is used to perform corresponding control on specific components in the circulating cooling water system 32 according to the preset value information and / or the real-time operation information of specific components; the temperature display module 38 is used to display the temperature of specific components in the circulating cooling water system 32, as well as the temperature change curve.

[0047] Optionally, specific components in the circulating cooling water system 32 include: at least one or a combination of: a cooling system, a first pneumatic valve, a second pneumatic valve, a gas-liquid heat exchanger, an electrolytic cell, a heating device, and a liquid-liquid heat exchanger.

[0048] Further, optionally, the data acquisition module 34 includes: a first data acquisition unit and a second data acquisition unit, wherein the first data acquisition unit is used to obtain the upper and lower limits of the temperature of the electrolytic cell, the upper and lower limits of the tube inlet temperature of the gas-liquid heat exchanger at different flow rates, the upper and lower limits of the shell temperature of the liquid-liquid heat exchanger at different flow rates, the upper and lower limits of the outlet flow rate of the heating device, and the upper and lower limits of the liquid level of the heating device, and generate preset value information; the second data acquisition unit is used to collect the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, and the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell. The real-time operation information of specific components in the circulating cooling water system 32 is generated by the temperature, the opening of the first pneumatic valve, the real-time flow of the flow measuring instrument at the inlet of the electrolytic cell, the opening of the second pneumatic valve, the number of electric heating components started in the heating device, the temperature of the electric heating components, the liquid level in the heating device, the air pressure at the top of the box in the heating device, the real-time temperature of the water outlet temperature measuring instrument in the heating device, the real-time flow of the water outlet flow measuring instrument in the heating device, the real-time temperature of the water inlet temperature measuring instrument of the pipe side of the gas-liquid heat exchanger, and the number of cooling devices started in the cooling system.

[0049] Among them, the cooling device in the cooling system in the embodiment of the present application may include multiple cooling devices, for example, the air cooling system includes: multiple fans, and one or more fans are started according to the cooling demand.

[0050] Optionally, the automatic control module 36 is further used to calculate, based on the purity requirements of oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, the flow rate of the cooling system collected by the second data acquisition unit, to obtain the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger corresponding to the flow rate; the automatic control module 36 is further used to calculate, based on the upper and lower limits of the temperature of the electrolyzer obtained by the first data acquisition unit, the real-time flow rate of the inlet flow measuring instrument of the electrolyzer, the real-time temperature of the inlet temperature measuring instrument of the electrolyzer, the real-time temperature of the outlet temperature measuring instrument of the electrolyzer, and the real-time flow rate of the outlet flow measuring instrument in the heating device, to obtain the upper and lower limits of the shell side inlet temperature of the liquid-liquid heat exchanger; the automatic control module 36 is further used to control the real-time temperature of the tube side inlet of the gas-liquid heat exchanger to be less than the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger by dynamically adjusting the number of cooling device startups and the cooling system flow rate; the automatic control module 36 is further used to control the real-time shell side inlet temperature of the liquid-liquid heat exchanger to be within the range of the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger.

[0051] Among them, the flow rate of the cooling system in the embodiment of the present application is equivalent to the real-time flow rate of the flow measuring instrument L2 at the water outlet of the heating device; measured by the instrument L2, the value is Q2.

[0052] Optionally, the automatic control module 36 is also used to start the electric heating components in the heating device to increase the inlet temperature of the liquid-liquid heat exchanger when the temperature of the liquid-liquid heat exchanger is controlled to increase, and when the inlet temperature of the liquid-liquid heat exchanger is close to the upper limit of the shell temperature of the liquid-liquid heat exchanger, the number of starts of the electric heating components is dynamically reduced, and at the same time, the cooling system dynamically adjusts the refrigeration under the premise of ensuring the cooling effect of the gas-liquid heat exchanger; when the temperature of the electrolytic cell is controlled to decrease, the number of starts of the cooling device in the cooling system is increased to improve the cooling capacity, and when the real-time inlet temperature of the liquid-liquid heat exchanger is close to the lower limit of the shell temperature of the liquid-liquid heat exchanger, the number of starts of the cooling device is dynamically reduced, and at the same time, the electric heating components in the heating device dynamically adjust the start and stop of the electric heating components according to the real-time inlet temperature of the liquid-liquid heat exchanger.

[0053] In summary, the circulating cooling water system in the embodiment of the present application is Figure 2 The circulating cooling water system shown in the figure includes: Figure 1 Heating device (heating water tank);

[0054] The data acquisition module 34 in the PEM electrolyzer temperature control system provided in the embodiment of the present application includes a data acquisition module 1 (i.e., the first data acquisition unit in the embodiment of the present application) and a data acquisition module 2 (i.e., the second data acquisition unit in the embodiment of the present application).

[0055] The data acquisition module 1 acquires system setting value information (i.e., the preset value information in the embodiment of the present application), including the upper and lower limits TDmax and TDmin of the temperature of the electrolytic cell (i.e., the upper and lower limits of the temperature of the electrolytic cell in the embodiment of the present application, the upper limit of the temperature is recorded as TDmax, and the lower limit of the temperature is recorded as TDmin), the upper limit TQmax of the tube inlet temperature of the gas-liquid heat exchanger at different flow rates (i.e., the upper limit of the tube inlet temperature of the gas-liquid heat exchanger in the embodiment of the present application, the upper limit of the tube inlet temperature of the gas-liquid heat exchanger is recorded as TQmax), the upper and lower limits TYmax and TYmin of the shell side temperature of the liquid-liquid heat exchanger at different flow rates (i.e., the upper limit of the shell side temperature of the liquid-liquid heat exchanger in the embodiment of the present application ... The upper and lower limits of the shell temperature of the liquid-liquid heat exchanger, the upper limit of the shell temperature of the liquid-liquid heat exchanger is denoted as TYmax, and the lower limit of the shell temperature of the liquid-liquid heat exchanger is denoted as TYmin), the upper and lower limits of the outlet flow rate of the heating water tank LSmax and LSmin (that is, the upper and lower limits of the outlet flow rate of the heating device in the embodiment of the present application, the upper limit of the outlet flow rate of the heating device is denoted as LSmax, and the lower limit of the outlet flow rate of the heating device is denoted as LSmin), and the upper and lower limits of the liquid level of the heating water tank Ymax and Ymin (that is, the upper and lower limits of the liquid level of the heating device in the embodiment of the present application, the upper limit of the liquid level of the heating device is denoted as Ymax, and the lower limit of the liquid level of the heating device is denoted as Ymin).

[0056] The data acquisition module 2 acquires real-time operation information of the system, including: the real-time temperature W1 of the outlet temperature measuring instrument T1 of the electrolytic cell, the real-time temperature W2 of the inlet temperature measuring instrument T2 of the electrolytic cell, the opening F1% of the pneumatic valve 1 (i.e., the first pneumatic valve in the embodiment of the present application), the real-time flow Q1 of the inlet flow measuring instrument L1 of the electrolytic cell, the opening F2% of the pneumatic valve 2 (i.e., the second pneumatic valve in the embodiment of the present application), as well as the number N of electric heating components started in the heating water tank, the temperature R1...RN of the electric heating components, the liquid level Y, the top air pressure P of the heating water tank, the real-time temperature W4 of the outlet temperature measuring instrument T4 of the heating water tank, the real-time flow Q2 of the outlet flow measuring instrument L2 of the heating water tank, the real-time temperature W3 of the water inlet temperature measuring instrument T3 of the gas-liquid heat exchanger, and the number M of cooling devices started in the cooling system.

[0057] The automatic control module 36 automatically adjusts the operation of each device in the system through the PEM electrolyzer temperature control method according to the information collected by the data acquisition module 34, and controls the shell side inlet temperature of the liquid-liquid heat exchanger to achieve the purpose of controlling the stability of the electrolyzer.

[0058] Figure 4 A schematic flow chart of a PEM electrolyzer temperature control method in a PEM electrolyzer temperature control system provided by an embodiment of the present invention; Figure 4 As shown, the temperature control method of the PEM electrolyzer in the embodiment of the present application is:

[0059] (1) Based on the purity requirements of the oxygen and hydrogen produced by the electrolyzer and the performance of the gas-liquid separator, according to the cooling system flow rate Q2, the corresponding upper limit value TQmax of the inlet temperature of the tube side of the gas-liquid heat exchanger under the flow rate is obtained (that is, in the embodiment of the present application, based on the purity requirements of the oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, combined with the flow rate of the cooling system collected by the second data acquisition unit, the calculation is performed to obtain the upper limit value of the inlet temperature of the tube side of the gas-liquid heat exchanger corresponding to the flow rate).

[0060] (2) Based on the upper and lower limits TDmax and TDmin of the operating temperature set for the electrolytic cell, according to the electrolytic cell flow rate Q1, the inlet temperature W2 and the outlet temperature W1, and the cooling system flow rate Q2, the upper and lower limits TYmax and TYmin of the shell inlet temperature of the liquid-liquid heat exchanger under this operating condition are obtained (that is, the upper and lower limits of the temperature of the electrolytic cell obtained by the first data acquisition unit in the embodiment of the present application are combined with the real-time flow of the inlet flow measuring instrument of the electrolytic cell obtained by the second data acquisition unit, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, and the real-time flow of the outlet flow measuring instrument in the heating device to calculate the upper and lower limits of the shell inlet temperature of the liquid-liquid heat exchanger).

[0061] (3) When the PEM electrolyzer temperature control system is in operation, priority is given to ensuring that the real-time temperature W3 of the gas-liquid heat exchanger tube inlet is less than the upper limit of the inlet temperature TQmax, that is, first ensuring the cooling effect of the gas-liquid heat exchanger on the gas produced by the electrolyzer. This guarantee is achieved by dynamically adjusting the number of cooling device startups and the cooling system flow rate (that is, in the embodiment of the present application, the real-time temperature of the gas-liquid heat exchanger tube inlet is controlled to be less than the upper limit of the gas-liquid heat exchanger tube inlet temperature by dynamically adjusting the number of cooling device startups and the cooling system flow rate).

[0062] (4) When the system is running, secondly, ensure that the real-time temperature W4 at the shell side inlet of the liquid-liquid heat exchanger is within the range of the upper and lower limits TYmax and TYmin of the shell side temperature of the liquid-liquid heat exchanger, that is, TYmin≤W4≤TYmax (that is, in the embodiment of the present application, the real-time temperature at the shell side inlet of the liquid-liquid heat exchanger is controlled to be within the range of the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger). The implementation measures for this guarantee are:

[0063] ① When the temperature of the electrolytic cell needs to be raised, the electric heater in the heating water tank is first started to quickly increase the inlet temperature W4 of the liquid-liquid heat exchanger. When the inlet temperature W4 of the liquid-liquid heat exchanger approaches the upper limit TYmax, the number of heater starts N is dynamically reduced, and the cooling system performs dynamic refrigeration adjustment on the premise of ensuring the cooling effect of the gas-liquid heat exchanger; (that is, in the embodiment of the present application, when the temperature of the electrolytic cell is controlled to rise, the electric heating component in the heating device is started to increase the inlet temperature of the liquid-liquid heat exchanger. When the inlet temperature of the liquid-liquid heat exchanger approaches the upper limit of the shell temperature of the liquid-liquid heat exchanger, the number of starts in the electric heating component is dynamically reduced, and the cooling system performs dynamic refrigeration adjustment on the premise of ensuring the cooling effect of the gas-liquid heat exchanger.)

[0064] ② When the temperature of the electrolytic cell needs to be lowered, the number of cooling devices started is increased first to improve the cooling capacity. When the real-time temperature W4 at the inlet of the liquid-liquid heat exchanger is close to the lower limit TYmin, the number of cooling devices started is dynamically reduced M, and at the same time, the electric heater in the heating water tank dynamically adjusts the start and stop of each heater according to the real-time temperature W4 at the inlet of the liquid-liquid heat exchanger (that is, in the embodiment of the present application, when the temperature of the electrolytic cell is controlled to be lowered, the number of cooling devices started in the cooling system is increased to improve the cooling capacity. When the real-time temperature at the inlet of the liquid-liquid heat exchanger is close to the lower limit of the shell temperature of the liquid-liquid heat exchanger, the number of cooling devices started is dynamically reduced, and at the same time, the electric heating components in the heating device dynamically adjust the start and stop of the electric heating components according to the real-time temperature at the inlet of the liquid-liquid heat exchanger).

[0065] The temperature display module displays the real-time temperature W1 of the electrolytic cell outlet temperature measuring instrument T1, the real-time temperature W2 of the electrolytic cell inlet temperature measuring instrument T2, the real-time temperature W3 of the gas-liquid heat exchanger tube inlet temperature measuring instrument T3, the real-time temperature W4 of the water tank outlet temperature measuring instrument T4, and the temperatures R1...RN of each electric heating component of the heating water tank, and draws and displays the real-time change curve of each temperature parameter.

[0066] The embodiment of the present invention provides a PEM electrolyzer temperature control system, which is connected to a circulating cooling water system and an automatic control module respectively through a data acquisition module, and is used to collect preset value information and / or real-time operation information of specific components in the circulating cooling water system; the automatic control module is connected to the circulating cooling water system and a temperature display module respectively, and is used to perform corresponding control on specific components in the circulating cooling water system according to preset value information and / or real-time operation information of specific components; the temperature display module is used to display the temperature of specific components in the circulating cooling water system, as well as the temperature change curve, so as to increase the heating rate of the electrolyzer, shorten the response time, and keep the temperature of the electrolyzer more stable, thereby improving the technical effect of system performance.

[0067] The present invention provides a method for controlling the temperature of a PEM electrolyzer. Figure 3 The PEM electrolyzer temperature control system shown in Figure 5 A schematic flow chart of a PEM electrolyzer temperature control method provided by an embodiment of the present invention; Figure 5 As shown, the PEM electrolyzer temperature control method in the embodiment of the present application includes:

[0068] Step S502, collecting preset value information and / or real-time operation information of specific components in the circulating cooling water system;

[0069] Optionally, collecting preset value information and / or real-time operation information of specific devices in the circulating cooling water system in step S502 includes: obtaining the upper and lower limits of the temperature of the electrolytic cell, the upper limit of the inlet temperature of the tube side of the gas-liquid heat exchanger at different flow rates, the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger at different flow rates, the upper and lower limits of the outlet flow rate of the heating device, and the upper and lower limits of the liquid level of the heating device, to generate preset value information; collecting the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the opening of the first pneumatic valve, the real-time flow of the inlet flow measuring instrument of the electrolytic cell, the opening of the second pneumatic valve, the number of electric heating components started in the heating device, the temperature of the electric heating components, the liquid level in the heating device, the air pressure at the top of the box in the heating device, the real-time temperature of the outlet temperature measuring instrument in the heating device, the real-time flow of the outlet flow measuring instrument in the heating device, the real-time temperature of the tube side inlet temperature measuring instrument of the gas-liquid heat exchanger, and the number of cooling devices started in the cooling system, to generate real-time operation information of specific devices in the circulating cooling water system.

[0070] Step S504, performing corresponding control on specific components in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific components;

[0071] Optionally, in step S504, specific components in the circulating cooling water system are controlled accordingly based on preset value information and / or real-time operation information of specific components, including: calculating based on the purity requirements of oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, combined with the flow rate of the cooling system, to obtain the upper limit of the tube inlet temperature of the gas-liquid heat exchanger corresponding to the flow rate; calculating based on the upper and lower limits of the temperature of the electrolyzer, combined with the real-time flow of the inlet flow measuring instrument of the electrolyzer, the real-time temperature of the inlet temperature measuring instrument of the electrolyzer, the real-time temperature of the outlet temperature measuring instrument of the electrolyzer, and the real-time flow of the outlet flow measuring instrument in the heating device, to obtain the upper and lower limits of the shell inlet temperature of the liquid-liquid heat exchanger; controlling the real-time temperature of the tube inlet of the gas-liquid heat exchanger to be less than the upper limit of the tube inlet temperature of the gas-liquid heat exchanger by dynamically adjusting the number of cooling device starts and the cooling system flow rate; controlling the real-time shell inlet temperature of the liquid-liquid heat exchanger to be within the range of the upper and lower limits of the shell temperature of the liquid-liquid heat exchanger.

[0072] Further, optionally, controlling the real-time temperature of the shell inlet of the liquid-liquid heat exchanger to be within the range of the upper and lower limits of the shell temperature of the liquid-liquid heat exchanger includes: when the temperature of the electrolytic cell is controlled to increase, starting the electric heating components in the heating device to increase the inlet temperature of the liquid-liquid heat exchanger, and when the inlet temperature of the liquid-liquid heat exchanger approaches the upper limit of the shell temperature of the liquid-liquid heat exchanger, dynamically reducing the number of starts of the electric heating components, and at the same time, the cooling system dynamically adjusts the refrigeration under the premise of ensuring the cooling effect of the gas-liquid heat exchanger; when the temperature of the electrolytic cell is controlled to decrease, increasing the number of starts of cooling devices in the cooling system to improve the cooling capacity, and when the real-time inlet temperature of the liquid-liquid heat exchanger approaches the lower limit of the shell temperature of the liquid-liquid heat exchanger, dynamically reducing the number of starts of the cooling devices, and at the same time, the electric heating components in the heating device dynamically adjust the start and stop of the electric heating components according to the real-time inlet temperature of the liquid-liquid heat exchanger.

[0073] Step S506, displaying the temperature of a specific component in the circulating cooling water system and a temperature variation curve.

[0074] The embodiment of the present invention provides a PEM electrolyzer temperature control method, which collects preset value information and / or real-time operation information of specific devices in a circulating cooling water system; performs corresponding control on specific devices in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific devices; displays the temperature of the specific devices in the circulating cooling water system, as well as the temperature change curve, thereby increasing the heating rate of the electrolyzer, shortening the response time, and keeping the temperature of the electrolyzer more stable, thereby improving the technical effect of system performance.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A heating device, characterized in that: The water inlet of the heating device is connected to the outlet of the gas-liquid heat exchanger tube in the circulating cooling water system, and the water outlet of the heating device is connected to the inlet of the liquid-liquid heat exchanger shell in the circulating cooling water system, including: The exhaust port, the pressure relief valve, the water inlet, the valve, the box, the thermometer, the flow meter, the water outlet, the barometer and the electric heating component, wherein: The exhaust port is located above the pressure relief valve, the pressure relief valve is located above the box, the barometer is connected to the box, and is used for the pressure relief valve to open the exhaust port to discharge the gas in the circulating cooling water system when the gas pressure in the box detected by the barometer is greater than a set value; The valve is connected to the water inlet and is used to control the flow rate of cooling water flowing into the box; The thermometer and the flowmeter are connected to the water outlet to detect the temperature and flow of the water outlet; The electric heating component is located in the box and is used to heat the cooling water whose temperature is lower than a threshold value.

2. The heating device according to claim 1, characterized in that The heating device also includes: a liquid level meter, a water collection tank, a sewage outlet and a water replenishment outlet, wherein: The liquid level meter is connected to the box body and is used to display the liquid level in the box body; when the liquid level in the box body reaches the low liquid level limit, the heating device controls the water replenishment port to start replenishing water; when the liquid level in the box body reaches the high liquid level limit, the heating device controls the water replenishment port to stop replenishing water; One end of the water collecting tank is connected to a drain valve, and the other end of the water collecting tank is connected to the box through a vertical pipe, so as to collect the water mixed in the gas in the pipeline of the barometer; The sewage outlet is located at the bottom of the box body and is used for draining water during regular water changes; The water replenishment port is located at the location where the cross-sectional area of ​​the box changes, and is used to replenish water through the water replenishment port when the liquid level of the box drops to the low liquid level limit.

3. A PEM electrolyzer temperature control system, characterized in that: include: Circulating cooling water system, data acquisition module, automatic control module and temperature display module, among which, The data acquisition module is connected to the circulating cooling water system and the automatic control module respectively, and is used to collect preset value information and / or real-time operation information of specific components in the circulating cooling water system; The automatic control module is connected to the circulating cooling water system and the temperature display module respectively, and is used to control the specific device in the circulating cooling water system accordingly according to the preset value information and / or the real-time operation information of the specific device; The temperature display module is used to display the temperature of the specific device in the circulating cooling water system and the temperature change curve.

4. The PEM electrolyzer temperature control system according to claim 3, characterized in that: The specific components in the circulating cooling water system include: at least one or a combination of a cooling system, a first pneumatic valve, a second pneumatic valve, a gas-liquid heat exchanger, an electrolytic cell, a heating device, and a liquid-liquid heat exchanger.

5. The PEM electrolyzer temperature control system according to claim 4, characterized in that: The data acquisition module includes: a first data acquisition unit and a second data acquisition unit, wherein: The first data acquisition unit is used to obtain the upper and lower limits of the temperature of the electrolytic cell, the upper and lower limits of the tube side inlet temperature of the gas-liquid heat exchanger at different flow rates, the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger at different flow rates, the upper and lower limits of the outlet flow rate of the heating device, and the upper and lower limits of the liquid level of the heating device, and generate the preset value information; The second data acquisition unit is used to collect the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the opening of the first pneumatic valve, the real-time flow of the inlet flow measuring instrument of the electrolytic cell, the opening of the second pneumatic valve, the number of starts of the electric heating components in the heating device, the temperature of the electric heating components, the liquid level in the heating device, the air pressure at the top of the box in the heating device, the real-time temperature of the water outlet temperature measuring instrument in the heating device, the real-time flow of the water outlet flow measuring instrument in the heating device, the real-time temperature of the water inlet temperature measuring instrument of the pipe side of the gas-liquid heat exchanger, and the number of starts of cooling devices in the cooling system, so as to generate real-time operation information of specific components in the circulating cooling water system.

6. The PEM electrolyzer temperature control system according to claim 5, characterized in that: The automatic control module is further used to calculate, based on the purity requirements of oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, the flow rate of the cooling system collected by the second data acquisition unit to obtain the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger corresponding to the flow rate; The automatic control module is further used to calculate the upper and lower limits of the shell side inlet temperature of the liquid-liquid heat exchanger according to the upper and lower limits of the temperature of the electrolytic cell acquired by the first data acquisition unit, in combination with the real-time flow of the inlet flow measuring instrument of the electrolytic cell acquired by the second data acquisition unit, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, and the real-time flow of the outlet flow measuring instrument in the heating device, so as to obtain the upper and lower limits of the shell side inlet temperature of the liquid-liquid heat exchanger; The automatic control module is further used to control the real-time temperature of the tube inlet of the gas-liquid heat exchanger to be less than the upper limit of the tube inlet temperature of the gas-liquid heat exchanger by dynamically adjusting the number of cooling device startups and the cooling system flow rate; The automatic control module is also used to control the real-time temperature of the shell side inlet of the liquid-liquid heat exchanger to be within the range of the upper limit and lower limit of the shell side temperature of the liquid-liquid heat exchanger.

7. The PEM electrolyzer temperature control system according to claim 6, characterized in that: The automatic control module is also used to start the electric heating components in the heating device when the temperature of the electrolytic cell is controlled to increase, increase the inlet temperature of the liquid-liquid heat exchanger, and dynamically reduce the number of startups in the electric heating components when the inlet temperature of the liquid-liquid heat exchanger approaches the upper limit of the shell temperature of the liquid-liquid heat exchanger. At the same time, the cooling system dynamically adjusts the refrigeration under the premise of ensuring the cooling effect of the gas-liquid heat exchanger; when the temperature of the electrolytic cell is controlled to decrease, increase the number of startups of the cooling devices in the cooling system to improve the cooling capacity. When the real-time inlet temperature of the liquid-liquid heat exchanger approaches the lower limit of the shell temperature of the liquid-liquid heat exchanger, dynamically reduce the number of startups of the cooling devices, and at the same time, the electric heating components in the heating device dynamically adjust the start and stop of the electric heating components according to the real-time inlet temperature of the liquid-liquid heat exchanger.

8. A method for controlling the temperature of a PEM electrolyzer, characterized in that: Applied to PEM electrolyzer temperature control system, including: Collecting preset value information and / or real-time operation information of specific components in the circulating cooling water system; According to the preset value information and / or the real-time operation information of the specific device, the specific device in the circulating cooling water system is controlled accordingly; The temperature of the specific device in the circulating cooling water system and the temperature variation curve are displayed.

9. The PEM electrolyzer temperature control method according to claim 8, characterized in that: The collecting of preset value information and / or real-time operation information of specific components in the circulating cooling water system includes: Obtaining the upper and lower limits of the temperature of the electrolytic cell, the upper and lower limits of the tube side inlet temperature of the gas-liquid heat exchanger at different flow rates, the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger at different flow rates, the upper and lower limits of the outlet flow rate of the heating device, and the upper and lower limits of the liquid level of the heating device, and generating the preset value information; The real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the opening of the first pneumatic valve, the real-time flow of the inlet flow measuring instrument of the electrolytic cell, the opening of the second pneumatic valve, the number of starts of the electric heating components in the heating device, the temperature of the electric heating components, the liquid level in the heating device, the air pressure at the top of the box in the heating device, the real-time temperature of the water outlet temperature measuring instrument in the heating device, the real-time flow of the water outlet flow measuring instrument in the heating device, the real-time temperature of the water inlet temperature measuring instrument of the pipe side of the gas-liquid heat exchanger, and the number of starts of cooling devices in the cooling system are collected to generate real-time operation information of specific components in the circulating cooling water system.

10. The PEM electrolyzer temperature control method according to claim 9, characterized in that: The corresponding control of the specific device in the circulating cooling water system according to the preset value information and / or the real-time operation information of the specific device includes: According to the purity requirements of oxygen and hydrogen generated by the electrolyzer and the performance of the gas-liquid separator, combined with the flow rate of the cooling system, calculation is performed to obtain the upper limit of the tube side inlet temperature of the gas-liquid heat exchanger corresponding to the flow rate; According to the upper and lower limits of the temperature of the electrolytic cell, the real-time flow rate of the inlet flow measuring instrument of the electrolytic cell, the real-time temperature of the inlet temperature measuring instrument of the electrolytic cell, the real-time temperature of the outlet temperature measuring instrument of the electrolytic cell, and the real-time flow rate of the outlet flow measuring instrument in the heating device are calculated to obtain the upper and lower limits of the shell side inlet temperature of the liquid-liquid heat exchanger; By dynamically adjusting the number of cooling device startups and the cooling system flow rate, the real-time temperature at the tube inlet of the gas-liquid heat exchanger is controlled to be lower than the upper limit of the tube inlet temperature of the gas-liquid heat exchanger; The real-time temperature at the shell side inlet of the liquid-liquid heat exchanger is controlled to be within the range of the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger.

11. The PEM electrolyzer temperature control method according to claim 10, characterized in that: The controlling the real-time shell side inlet temperature of the liquid-liquid heat exchanger to be within the range of the upper and lower limits of the shell side temperature of the liquid-liquid heat exchanger comprises: When the temperature of the electrolytic cell is controlled to rise, the electric heating component in the heating device is started to increase the inlet temperature of the liquid-liquid heat exchanger. When the inlet temperature of the liquid-liquid heat exchanger approaches the upper limit of the shell temperature of the liquid-liquid heat exchanger, the number of starts in the electric heating component is dynamically reduced. At the same time, the cooling system performs dynamic refrigeration adjustment under the premise of ensuring the cooling effect of the gas-liquid heat exchanger; When the temperature of the electrolytic cell is controlled to be lowered, the number of cooling devices started in the cooling system is increased to improve the cooling capacity. When the real-time inlet temperature of the liquid-liquid heat exchanger is close to the lower limit of the shell temperature of the liquid-liquid heat exchanger, the number of cooling devices started is dynamically reduced. At the same time, the electric heating components in the heating device are dynamically adjusted to start and stop according to the real-time inlet temperature of the liquid-liquid heat exchanger.

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