A shell-and-tube water-cooled hydrogen-oxygen generator and control method

Abstract

The application discloses a column-tube water-cooled hydrogen-oxygen generator and a use method thereof, and relates to the technical field of hydrogen-oxygen generators. The column-tube water-cooled heat exchanger is connected with the cooling tower at the cold side, the raw material outlet is connected with the hot side inlet of the column-tube water-cooled heat exchanger, the hot side outlet of the column-tube water-cooled heat exchanger is connected with the input end of the hydrogen-oxygen generator electrolytic cell, the output end of the hydrogen-oxygen generator electrolytic cell is connected with the liquid inlet of the gas-liquid separation device, the gas outlet of the gas-liquid separation device is connected with the liquid outlet of the gas-liquid separation device, and the high-temperature alkali liquor and the cooling circulating water are forced to conduct convection heat exchange in the shell-and-tube heat exchanger outside the electrolytic cell. The application has the advantages of high heat exchange efficiency, short response time, fast and efficient heat exchange, and the problems that the existing equipment cannot realize high-temperature environment, poor ventilation, and the electrolytic cell alkali liquor is difficult to cool.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water electrolysis hydrogen production equipment, in particular to a tubular water-cooled hydrogen-oxygen generator and a control method. BACKGROUND

[0002] The hydrogen-oxygen generator can use green electricity such as photoelectricity, hydropower, and wind power to produce hydrogen-oxygen mixed gas. The mixed ratio of hydrogen and oxygen is 2:1, which can achieve efficient and stable combustion, and the only byproduct is water, achieving zero emission during use. The hydrogen-oxygen mixed gas has a high calorific value and can replace part of natural gas and oxygen-ethyne gas for industrial cutting, metal welding, and other various flame processing scenarios, and has a wide application prospect.

[0003] The existing hydrogen-oxygen generator mostly uses a finned air-cooled heat exchanger, which is matched with a forced circulation fan to cool the high temperature generated by the electrolytic cell. In the case of high ambient temperature and poor ventilation, the cooling efficiency is insufficient, the circulating alkali solution cannot be cooled to an appropriate temperature range, the electrolytic cell cannot be cooled to an appropriate working temperature zone, and the hydrogen-oxygen generator often stops due to overheating protection. In addition, the sealing gasket and diaphragm material of the hydrogen-oxygen generator are aged and fail, and a large amount of alkali solution and water vapor is taken away by high temperature, causing corrosion of the system pipeline.

[0004] In addition, the inlet position of the hydrogen-oxygen mixed gas and alkali solution mixture in the existing hydrogen-oxygen separator is located below the separator. During operation, a large amount of alkali solution and mixed gas is discharged under the forced action of the alkali solution circulating pump, causing serious alkali solution overflow. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a tubular water-cooled hydrogen-oxygen generator and a control method, which can maintain the working temperature of the electrolytic cell at an optimal state, run efficiently and stably, and help achieve carbon peak and carbon neutrality.

[0006] The present application is realized by the following technical solutions:

[0007] A tubular water-cooled hydrogen-oxygen generator, comprising a hydrogen-oxygen generator electrolytic cell, a gas-liquid separation device, a tubular water-cooled heat exchanger, and a cooling tower.

[0008] The cold side of the tubular water-cooled heat exchanger is connected to the cooling tower, the hot side inlet of the tubular water-cooled heat exchanger is connected to the raw material outlet, the hot side outlet of the tubular water-cooled heat exchanger is connected to the input end of the hydrogen-oxygen generator electrolytic cell, the output end of the hydrogen-oxygen generator electrolytic cell is connected to the liquid inlet of the gas-liquid separation device, the gas outlet of the gas-liquid separation device is connected to the energy consumption device, and the liquid outlet of the gas-liquid separation device is connected to the hot side inlet of the tubular water-cooled heat exchanger.

[0009] Preferably, the outlet of the cooling tower is connected to the inlet of the tube side of the shell-and-tube water-cooled heat exchanger, and the outlet of the tube side of the shell-and-tube water-cooled heat exchanger is connected to the inlet of the cooling tower.

[0010] The inlet of the shell side of the shell-and-tube water-cooled heat exchanger is connected to the outlet of the raw material, and the outlet of the shell side of the shell-and-tube water-cooled heat exchanger is connected to the input end of the electrolytic cell of the hydrogen-oxygen generator.

[0011] Preferably, the lye and the cooling water in the shell-and-tube water-cooled heat exchanger flow countercurrently.

[0012] Preferably, the gas-liquid separation device comprises a plurality of gas-liquid separators connected in series, the upper part of the gas-liquid separator is a gas phase space, and the lower part is a liquid phase space, the gas phase spaces of the plurality of gas-liquid separators are connected in series, and the liquid phase spaces of the plurality of gas-liquid separators are connected in series.

[0013] The output end of the electrolytic cell of the hydrogen-oxygen generator is in communication with the liquid phase space of the first-stage gas-liquid separator, the output end of the electrolytic cell of the hydrogen-oxygen generator is connected, the gas outlet of the last-stage gas-liquid separator is connected to the energy-consuming device, and the liquid outlet of the last-stage gas-liquid separator is connected to the inlet of the lye circulating pump.

[0014] Preferably, the outlet of the raw material and the liquid outlet of the last-stage gas-liquid separator are connected to the hot side inlet of the shell-and-tube water-cooled heat exchanger through the lye circulating pump.

[0015] Preferably, the lowest liquid level of the liquid phase space of the gas-liquid separator is higher than the output end of the electrolytic cell of the hydrogen-oxygen generator.

[0016] Preferably, the energy-consuming device comprises a water seal tank and a cutting torch, the gas inlet of the water seal tank is located at the bottom of the tank body, the gas outlet is located above the liquid level, the gas inlet of the water seal tank is connected to the gas outlet of the gas-liquid separation device, and the gas outlet of the water seal tank is connected to the cutting torch.

[0017] Preferably, the shell-and-tube water-cooled heat exchanger is in a vertical or horizontal structure.

[0018] A control method of a shell-and-tube water-cooled hydrogen-oxygen generator, comprising the following steps:

[0019] Step 1, the lye is pressurized and injected into the hot side of the shell-and-tube water-cooled heat exchanger, and the lye is cooled by heat exchange with the cooling water in the cold side of the shell-and-tube water-cooled heat exchanger and then enters the electrolytic cell of the hydrogen-oxygen generator;

[0020] Step 2, the lye generates hydrogen-oxygen mixed gas in the electrolytic cell of the hydrogen-oxygen generator and enters the gas-liquid separation device under pressure;

[0021] Step 3, the gas-liquid separation device separates the lye and the hydrogen-oxygen mixed gas, the separated hydrogen-oxygen mixed gas enters the energy-consuming device, and the separated lye is pressurized and injected into the hot side of the shell-and-tube water-cooled heat exchanger again.

[0022] Preferably, when the temperature of the alkali solution in the hydrogen-oxygen generator electrolytic cell exceeds the preset range, the temperature of the alkali solution is adjusted by controlling the flow of the circulating cooling water passing through the tube-type water-cooled heat exchanger.

[0023] Compared with the prior art, the present application has the following beneficial technical effects:

[0024] The present application provides a tube-type water-cooled hydrogen-oxygen generator, which comprises a hydrogen-oxygen generator electrolytic cell, a gas-liquid separation device, a tube-type water-cooled heat exchanger, and a cooling tower. The high-temperature alkali solution and the cooling circulating water are subjected to forced convection heat exchange in the shell-and-tube heat exchanger outside the electrolytic cell, the heat exchange efficiency is high, the response time is short, fast and efficient heat exchange can be realized, and the practical problems that the existing equipment cannot realize poor ventilation at high ambient temperature, resulting in a significant decrease in the efficiency of air-cooled heat exchange, and the alkali solution in the electrolytic cell is difficult to cool are solved.

[0025] Further, the gas-liquid separation device is vertical, the alkali solution and mixed gas inlet are placed above the set liquid level, the gas phase space above the liquid level is connected by a pipeline to increase the volume of the gas phase space, and the liquid phase space below the liquid level is connected by a pipeline to increase the volume of the liquid phase space. At the same time, the multi-stage separation form can effectively solve the problem of liquid overflow and improve the gas-liquid ratio. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The present application provides a tube-type water-cooled hydrogen-oxygen generator, which comprises a hydrogen-oxygen generator electrolytic cell, a gas-liquid separation device, a tube-type water-cooled heat exchanger, and a cooling tower. The high-temperature alkali solution and the cooling circulating water are subjected to forced convection heat exchange in the shell-and-tube heat exchanger outside the electrolytic cell, the heat exchange efficiency is high, the response time is short, fast and efficient heat exchange can be realized, and the practical problems that the existing equipment cannot realize poor ventilation at high ambient temperature, resulting in a significant decrease in the efficiency of air-cooled heat exchange, and the alkali solution in the electrolytic cell is difficult to cool are solved.

[0027] In the figure: 1 cooling tower; 2 first gas-liquid separator; 3 second gas-liquid separator; 4 third gas-liquid separator; 5 vertical water seal; 6 cutting gun; 7 hydrogen-oxygen generator electrolytic cell; 8 alkali solution circulating pump; 9 alkali solution heat exchanger; 10 cooling water circulating pump. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the accompanying drawings, which are explanatory rather than limiting.

[0029] Referring to Figure 1 A tube-type water-cooled hydrogen-oxygen generator comprises a hydrogen-oxygen generator electrolytic cell 7, a gas-liquid separation device, a cutting device, an alkali solution heat exchanger 9, and a cooling tower 1.

[0030] The outlet of the cooling tower 1 is connected with the cold side inlet of the alkali solution heat exchanger 9, the cold side outlet of the alkali solution heat exchanger 9 is connected with the inlet of the cooling tower 1, the hot side inlet of the alkali solution heat exchanger 9 is connected with the alkali solution raw material outlet, the hot side outlet of the alkali solution heat exchanger 9 is connected with the input end of the hydrogen-oxygen generator electrolytic cell 7, the output end of the hydrogen-oxygen generator electrolytic cell 7 is connected with the inlet of the gas-liquid separation device, the gas outlet of the gas-liquid separation device is connected with the cutting device, and the liquid outlet of the gas-liquid separation device is connected with the hot side inlet of the alkali solution heat exchanger 9.

[0031] The outlet of the cooling tower 1 is connected with the cold side inlet of the lye heat exchanger 9 through the cooling water circulating pump 10, and the cooling tower 1, the cooling water circulating pump 10 and the lye heat exchanger 9 form a cooling device. The cooling water in the cooling tower 1 enters the cold side of the lye heat exchanger 9 through the cooling water circulating pump 10, and the lye enters the hot side of the lye heat exchanger 9. The cooling water and the lye exchange heat in the lye heat exchanger 9. The cooling water absorbs the heat of the lye in the lye cooler, and then releases heat to reduce the water temperature of the cooling water, and then enters the cooling tower to form a circulating cooling through the cooling water circulating pump.

[0032] The cooling tower 1 is a water cooling tower.

[0033] The lye raw material outlet is connected with the inlet of the lye circulating pump 8 through the valve Q1. The outlet of the lye circulating pump 8 is connected with the hot side inlet of the lye heat exchanger through the valve Q4. The hot side inlet of the lye heat exchanger is connected with the inlet of the hydrogen-oxygen generator electrolytic cell 7 through the valve Q2. The lye circulating pump 8 forces the hydrogen-oxygen mixed gas and the lye of the hydrogen-oxygen generator electrolytic cell to enter the gas-liquid separation device. The gas-liquid separation device is used for separating the hydrogen-oxygen mixed gas and the lye output by the hydrogen-oxygen generator electrolytic cell.

[0034] The gas-liquid separation device includes multiple gas-liquid separators connected in series. The inlet of the first gas-liquid separator is connected with the output end of the hydrogen-oxygen generator electrolytic cell. The gas outlet of the last gas-liquid separator is connected with the cutting device. The liquid outlet of the last gas-liquid separator is connected with the inlet of the lye circulating pump 8 through the valve Q5.

[0035] The hydrogen-oxygen generator electrolytic cell is a device for generating hydrogen-oxygen mixed gas. The lye generates hydrogen-oxygen mixed gas in the electrolytic cell under the action of electric current. The outlet of the hydrogen-oxygen generator electrolytic cell is provided with a temperature transmitter. The electrolytic cell works in a full lye state. The hydrogen-oxygen mixed gas generated when the electrolytic cell is powered is forced to enter the gas-liquid separation device with the lye under the forced circulation of the lye pump to perform gas-liquid separation.

[0036] In the embodiment, the gas-liquid separation device adopts a three-stage series connection form, including a first gas-liquid separator 2, a second gas-liquid separator 3 and a third gas-liquid separator 4 connected in series. After three-stage separation, the hydrogen-oxygen mixed gas is relatively pure, the lye content is very small, and the gas-liquid ratio is high. The gas-liquid separator adopts a vertical separation tank. The mixed gas inlet is arranged in the gas phase space above the liquid surface. The back lye port is arranged below the liquid surface. The gas inlets of the three gas-liquid separators are sequentially connected. The back liquid ports of the three gas-liquid separators are sequentially connected. The three-stage separation device sequentially separates the hydrogen-oxygen mixed gas and the lye. The lowest liquid surface of the gas-liquid separator is higher than the hydrogen-oxygen generator electrolytic cell. The liquid surface of the gas-liquid separator is provided with a lowest liquid level and a highest liquid level to ensure that the electrolytic cell works in a full lye state and the size of the gas phase space meets the separation requirements.

[0037] The caustic lye heat exchanger 9 is used for cooling high-temperature caustic lye, and the caustic lye flowing back from the gas-liquid separation device and the cooling circulating water are forced to conduct heat exchange in the caustic lye heat exchanger under the action of the circulating water pump and the caustic lye circulating pump, so as to cool the caustic lye. The caustic lye heat exchanger is in the form of a horizontal or vertical tube-type water-cooled heat exchanger. The caustic lye flows through the shell side of the heat exchanger, and the circulating water flows through the tube side of the heat exchanger. The caustic lye enters the shell side in the form of top-in and bottom-out, and the caustic lye heat exchanger is placed at a position lower than the lowest point of the separator. The caustic lye inlet position corresponds to the cooling circulating water outlet position, and the caustic lye outlet position corresponds to the cooling circulating water inlet position. The cooling circulating water and the caustic lye flow in a countercurrent manner, so as to ensure the maximum heat exchange efficiency.

[0038] The cutting device comprises a water seal tank 5 and a cutting gun 6. The water seal tank 5 is filled with a certain amount of water. The gas inlet of the water seal tank 5 is located at the bottom of the tank body, the gas outlet is located above the liquid level, and preferably the gas outlet is located at the top of the tank body. The gas inlet of the water seal tank 5 is connected to the gas outlet of the last-stage gas-liquid separation device, and the gas outlet of the water seal tank 5 is connected to the cutting gun 6.

[0039] The water seal tank 5 adopts a vertical water seal, which is used as a backfire device during flame processing. The vertical water seal is filled with water to a certain liquid level. Hydrogen-oxygen mixed gas enters from the lower part and exits from the upper part, so as to prevent unnecessary damage caused by flame backfire to the device body. The hydrogen-oxygen mixed gas output by the water seal tank 5 forms a flame through the cutting gun, and then flame cutting operation is performed.

[0040] A control method of the tube-type water-cooled hydrogen-oxygen generator provided by the present application will be described in detail below, which comprises the following steps:

[0041] Step 1: The caustic lye circulating pump 8 pressurizes the caustic lye and injects it into the hot side of the caustic lye heat exchanger 9. After heat exchange between the caustic lye and the cooling water on the cold side of the caustic lye heat exchanger 9, the caustic lye enters the hydrogen-oxygen generator electrolytic cell.

[0042] Step 2: The caustic lye generates hydrogen-oxygen mixed gas in the hydrogen-oxygen generator electrolytic cell, and the hydrogen-oxygen mixed gas enters the gas-liquid separation device under pressure.

[0043] Step 3: The gas-liquid separation device separates the caustic lye and the hydrogen-oxygen mixed gas. The separated hydrogen-oxygen mixed gas enters the cutting device, and the separated caustic lye is pressurized and injected into the hot side of the caustic lye heat exchanger 9 again.

[0044] Example 1

[0045] A control method of the tube-type water-cooled hydrogen-oxygen generator, which is specifically as follows:

[0046] S1, close the valve Q5, open the valve Q1, the valve Q4 and the valve Q2, and add the prepared lye into the hydrogen-oxygen generator electrolytic tank through the lye circulating pump. After the hydrogen-oxygen generator electrolytic tank is filled with the lye, the lye gradually rises to the separation tank until the liquid level of the separation tank reaches the preset liquid level height, and then the lye circulating pump is closed and the valve Q1 is closed.

[0047] S2, the valve Q1 remains in the closed state, and the valves Q5, Q4, Q3 and Q2 are in the open state.

[0048] The positive and negative electrodes of the hydrogen-oxygen generator electrolytic tank are respectively connected with the corresponding electrodes of the rectifier cabinet, direct current is supplied to the hydrogen-oxygen generator electrolytic tank through the rectifier cabinet, the lye circulating pump is reopened, and the current value is slowly increased until the design requirement is reached.

[0049] S3, the lye in the hydrogen-oxygen generator electrolytic tank generates hydrogen-oxygen mixed gas under the driving of direct current, and the hydrogen-oxygen mixed gas and the lye generated by the electrolytic tank enter the first gas-liquid separator, the second gas-liquid separator and the third gas-liquid separator in turn under the pressure pushing of the lye circulating pump.

[0050] S4, the separated lye passes through the outlet at the bottom of the third gas-liquid separator, is pressurized by the lye circulating pump, and then enters the lye heat exchanger again to exchange heat with circulating cooling water. The lye cooled by heat exchange returns to the electrolytic tank again to participate in the reaction. The separated oxygen mixed gas reaches the cutting torch through the vertical water seal and can perform normal flame operation.

[0051] S5, the temperature of the gas-liquid mixture at the outlet of the hydrogen-oxygen generator electrolytic tank is collected by the temperature transmitter TT1. When the temperature is greater than the preset temperature, the opening degree of the electric regulating valve Q3 is automatically adjusted by the control system to control the flow of circulating water, and then the temperature of the lye in the hydrogen-oxygen generator electrolytic tank is controlled.

[0052] When the lye temperature is too high, the opening degree of the valve Q3 is increased, the flow of circulating cooling water is increased, and the lye temperature is reduced to an appropriate working temperature range. When the electrolytic tank temperature collected by TT1 is lower than the set temperature, the opening degree of Q3 is appropriately reduced by the control system to reduce the amount of circulating water entering, so that the temperature of the electrolytic tank is appropriately increased. By setting a reasonable working temperature upper limit and lower limit, the temperature is collected by the temperature transmitter, the opening degree of the valve Q3 is controlled, the flow of circulating water is controlled, and then the lye flowing back from the separation tank is stabilized in an efficient working temperature range.

[0053] The application provides a tubular water-cooled hydrogen-oxygen generator, which forces high-temperature lye and cooling circulating water to conduct forced convection heat exchange in a tube-shell heat exchanger outside an electrolytic cell, has high heat exchange efficiency, short response time and can realize fast and efficient heat exchange.

[0054] The application has the following beneficial effects:

[0055] The existing equipment mostly adopts finned air-cooled heat exchangers, and a forced circulation fan is used to cool the high temperature generated by the electrolytic cell, and the cooling efficiency is insufficient in the case of high ambient temperature and poor ventilation, and the circulating lye cannot be cooled to an appropriate temperature range. The application forces high-temperature lye and cooling circulating water to conduct forced convection heat exchange in a tube-shell heat exchanger outside an electrolytic cell, has high heat exchange efficiency, short response time and can realize fast and efficient heat exchange, solves the problem that the existing equipment cannot realize high ambient temperature and poor ventilation, and the air-cooled heat exchange efficiency is greatly reduced, and the lye of the electrolytic cell is difficult to cool.

[0056] The existing equipment hydrogen-oxygen separator has a mixture inlet position of hydrogen-oxygen mixed gas and lye below the separator, and a large amount of lye and mixed gas flows out under the forced action of the lye circulating pump during operation, causing serious lye overflow. The application adopts a vertical separator, the lye and mixed gas inlet is placed above the set liquid level, the gas phase space above the liquid level is connected by a pipeline, the gas phase space volume is increased, the liquid phase space below the liquid level is connected by a pipeline, and the liquid phase space volume is increased. At the same time, the multi-stage separation form can effectively solve the problem of overflow and improve the gas-liquid ratio.

[0057] The above content only illustrates the technical idea of the application, and cannot limit the protection scope of the application, and any modification made according to the technical idea of the application on the basis of the technical scheme falls within the protection scope of the claims of the application.

Claims

1. A tubular water-cooled hydrogen-oxygen generator, characterized in that, Includes a hydrogen-oxygen generator electrolyzer (7), a gas-liquid separation device, a tubular water-cooled heat exchanger, and a cooling tower (1); The cold side of the tubular water-cooled heat exchanger is connected to the cooling tower (1), the hot side inlet of the tubular water-cooled heat exchanger is connected to the raw material outlet, the hot side outlet of the tubular water-cooled heat exchanger is connected to the input end of the hydrogen-oxygen generator electrolyzer (7), the output end of the hydrogen-oxygen generator electrolyzer (7) is connected to the liquid inlet of the gas-liquid separation device, the gas outlet of the gas-liquid separation device is connected to the energy-consuming device, and the liquid outlet of the gas-liquid separation device is connected to the hot side inlet of the tubular water-cooled heat exchanger. The outlet of the cooling tower (1) is connected to the tube-side inlet of the shell-and-tube water-cooled heat exchanger, and the tube-side outlet of the shell-and-tube water-cooled heat exchanger is connected to the inlet of the cooling tower (1). The shell-side inlet of the tubular water-cooled heat exchanger is connected to the raw material outlet, and the shell-side outlet of the tubular water-cooled heat exchanger is connected to the input end of the hydrogen-oxygen generator electrolyzer (7). The gas-liquid separation device includes a series of multi-stage gas-liquid separators. The upper part of the gas-liquid separator is a gas phase space, and the lower part is a liquid phase space. The gas phase spaces of the multi-stage gas-liquid separators are connected in series, and the liquid phase spaces of the multi-stage gas-liquid separators are connected in series. The output end of the hydrogen-oxygen generator electrolyzer is connected to the liquid phase space of the first-stage gas-liquid separator, the gas outlet of the last-stage gas-liquid separator is connected to the energy-consuming device, and the liquid outlet of the last-stage gas-liquid separator is connected to the hot-side inlet of the shell-and-tube water-cooled heat exchanger. The energy-consuming device includes a water seal tank (5) and a cutting torch (6). The gas inlet of the water seal tank (5) is located at the bottom of the tank body, and the gas outlet is located above the liquid surface. The gas inlet of the water seal tank (5) is connected to the gas outlet of the gas-liquid separator, and the gas outlet of the water seal tank (5) is connected to the cutting torch (6). The lowest liquid level in the liquid phase space of the gas-liquid separator is higher than the output end of the hydrogen-oxygen generator electrolyzer.

2. A tubular water-cooled hydrogen-oxygen generator according to claim 1, characterized in that, The alkaline solution and cooling water in the tubular water-cooled heat exchanger flow in opposite directions.

3. A tubular water-cooled hydrogen-oxygen generator according to claim 1, characterized in that, The raw material outlet and the liquid outlet of the last stage gas-liquid separator are connected to the hot side inlet of the shell-and-tube water-cooled heat exchanger via an alkaline circulating pump (8).

4. A tubular water-cooled hydrogen-oxygen generator according to claim 1, characterized in that, The tubular water-cooled heat exchanger has a vertical or horizontal structure.

5. A control method for a tubular water-cooled hydrogen-oxygen generator according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Pressurize and inject the alkaline solution into the hot side of the shell-and-tube water-cooled heat exchanger. After the alkaline solution exchanges heat with the cooling water on the cold side of the shell-and-tube water-cooled heat exchanger to cool down, it enters the electrolytic cell of the hydrogen-oxygen generator. Step 2: The alkaline solution generates a hydrogen-oxygen mixed gas in the hydrogen-oxygen generator electrolysis cell, and then enters the gas-liquid separation device under pressure; Step 3: The gas-liquid separation device separates the alkaline solution and the hydrogen-oxygen mixture. The separated hydrogen-oxygen mixture enters the energy-consuming device, and the separated alkaline solution is pressurized again and injected into the hot side of the shell-and-tube water-cooled heat exchanger.

6. The control method for a tubular water-cooled hydrogen-oxygen generator according to claim 5, characterized in that, When the temperature of the alkaline solution in the electrolytic cell of the hydrogen-oxygen generator exceeds the preset range, the temperature of the alkaline solution is adjusted by controlling the flow rate of the circulating cooling water passing through the shell-and-tube water-cooled heat exchanger.

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