Cooling system for hydrogen production equipment of offshore hydrogen production platform

Abstract

An offshore hydrogen production platform hydrogen production equipment cooling system comprises a gas-liquid treater, a hydrogen purification device, a chilled water machine, a hydrogen compressor and a hydrogenation machine, an inlet of the gas-liquid treater is connected with an electrolytic bath, and an outlet of the gas-liquid treater is sequentially connected with a hydrogen passivation device, the hydrogen compressor, a buffer gas tank, the hydrogen compressor, a hydrogen storage tank and the hydrogenation machine. The hydrogen adding machine is communicated with the hydrogen-powered ship and provides hydrogen for the hydrogen-powered ship, and the refrigerating unit is connected with the hydrogen passivating device through a pipeline to form a circulating pipeline. Aiming at the characteristics of offshore and shallow sea areas and a fixed hydrogen production platform, when hydrogen production equipment is cooled, required fresh water is provided through cooling of the air cooling radiator arranged on the main deck of the platform, so that the situation that seawater with poor cleanliness in the offshore and shallow sea areas flows through a plate heat exchanger to cool the fresh water to be provided is avoided; the cooling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of offshore hydrogen production platform design and construction, and particularly relates to a hydrogen production equipment cooling system of an offshore hydrogen production platform. BACKGROUND

[0002] Offshore green hydrogen will be applied more and more in recent years and in the future due to its advantages of being clean and non-polluting. Based on clean energy development of offshore wind farms, offshore water electrolysis hydrogen production technology is adopted in combination with high-density hydrogen storage and transportation technology, hydrogen is supplied to users through hydrogen-powered ships, and orderly operation of marine hydrogen energy can be realized. To realize the above-mentioned complete marine hydrogen energy application technology route, an offshore hydrogen production platform and a series of hydrogen production equipment on the platform are needed, and the hydrogen production equipment includes a gas-liquid processor, a hydrogen purification device, a refrigerated water machine, a hydrogen compressor, a hydrogen filling machine, etc.

[0003] In actual application, the hydrogen production equipment needs to be cooled. A conventional cooling water system design is to draw seawater from a seabed valve box by a seawater cooling pump, make the seawater flow through a plate heat exchanger to cool fresh water, and then make the cooled fresh water cool the hydrogen production equipment. The inventor finds that for offshore ships in offshore and shallow sea areas, it is found that the seawater is usually poor in cleanliness when the platform is in use, and the seawater drawn in may have sand or silt, which can easily cause blockage of pipelines and plate heat exchangers, affect the use effect of the heat exchangers, and even cause the plate heat exchangers to be unable to work. Similar problems have also occurred in actual use. In addition, for a shallow sea fixed hydrogen production platform, it is not convenient to extract seawater, a submersible pump needs to be used, and the use and installation are not convenient, and the submersible pump needs to be placed in deep seawater, so the quality of the extracted seawater will be worse. The air-cooled radiator mentioned in the present application has fresh water as the internal medium, and does not need to use a seawater cooling pump to draw seawater from a seabed valve box to flow through a plate heat exchanger to cool fresh water. Instead, the air-cooled radiator arranged on the main deck is used to cool the fresh water, and the cooled fresh water further cools the hydrogen production equipment. The use of the air-cooled radiator can further improve the cooling efficiency and eliminate the problem of water quality cleanliness in the radiator, and can also further save costs in general. SUMMARY

[0004] To solve the above-mentioned problems, the present application provides a hydrogen production equipment cooling system of an offshore hydrogen production platform, and the technical scheme adopted by the present application is as follows:

[0005] The hydrogen production equipment cooling system of the offshore hydrogen production platform is characterized in that a plurality of air-cooled radiators are arranged on the main deck of the platform, the air-cooled radiators provide cooled fresh water for the gas-liquid processor, the refrigerated unit, the hydrogen compressor and the hydrogen filling machine, and the cooled fresh water is returned to the air-cooled radiators.

[0006] The expansion water tank provides fresh water for the air-cooled radiator, and also provides fresh water for the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine.

[0007] The hydrogen production system comprises a gas-liquid processor, a hydrogen purification device, a refrigeration unit, a hydrogen compressor, and a hydrogen filling machine. The inlet of the gas-liquid processor is connected with the electrolytic tank. The outlet of the gas-liquid processor is sequentially connected with the hydrogen passivation device, the hydrogen compressor, the buffer gas tank, the hydrogen compressor, the hydrogen storage tank, and the hydrogen filling machine. The hydrogen filling machine is connected with the hydrogen-powered ship to provide hydrogen for the hydrogen-powered ship. The refrigeration unit is connected with the hydrogen passivation device through a pipeline to form a circulation pipeline.

[0008] The water supply port of the expansion water tank is connected with the air-cooled radiator, the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine through pipelines. The expansion water tank is connected with the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine after passing through the water supply buffer gas tank. The water outlet of the air-cooled radiator is connected with the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine through pipelines. Cooling fresh water flows in the pipelines.

[0009] The fresh water cooled by the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine is returned to the air-cooled radiator through a cooling water delivery pump and a pipeline connected with the water return port of the air-cooled radiator.

[0010] Further, the air-cooled radiator and the expansion water tank are arranged in the open area of the main deck of the platform, and the gas-liquid processor, the refrigeration unit, the hydrogen passivation device, the hydrogen compressor, and the hydrogen filling machine are arranged in the hydrogen production equipment mechanical room under the main deck.

[0011] Further, the air-cooled radiator and the expansion water tank are provided with a discharge port, which can be connected to the platform discharge system through a pipeline. The expansion water tank is also provided with a cooling water injection port, an overflow port, and a low liquid level alarm switch.

[0012] Further, temperature sensors and pressure gauges are arranged on the paths of the air-cooled radiator to the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine. Pressure gauges, sampling valves, and temperature sensors are sequentially arranged on the return circuits of the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine to the air-cooled radiator.

[0013] Further, discharge valves are arranged at the outlets of the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine on the return circuits of the gas-liquid processor, the refrigeration unit, the hydrogen compressor, and the hydrogen filling machine to the air-cooled radiator.

[0014] The offshore hydrogen production platform hydrogen production equipment cooling system further has three water supplementing openings, one of which is a backup water supplementing opening.

[0015] The offshore hydrogen production platform hydrogen production equipment cooling system further has three air-cooled radiators, one of which is a backup air-cooled radiator.

[0016] The offshore hydrogen production platform hydrogen production equipment cooling system further has two cooling water delivery pumps.

[0017] The offshore hydrogen production platform hydrogen production equipment cooling system further has antifreeze in the cooling water.

[0018] The present application is directed to the characteristics of offshore, shallow sea areas and fixed hydrogen production platforms, and when the hydrogen production equipment is cooled, the fresh water required is provided by the air-cooled radiator arranged on the main deck of the platform, avoiding the use of seawater with poor cleanliness in the offshore, shallow sea areas to provide seawater through the plate heat exchanger to cool the fresh water, and improving the cooling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a system schematic diagram of the present application;

[0020] Among them, 1-air-cooled radiator, 2-expansion tank, 3-gas-liquid processor, 4-refrigeration unit, 5-hydrogen purification device, 6-first hydrogen compressor, 7-second hydrogen compressor, 8-hydrogen filling machine, 9-water supplementing buffer air tank, 10-temperature sensor, 11-pressure gauge, 12-temperature sensor, 13-pressure gauge, 14-sampling valve, 15-drain valve, 16-cooling water delivery pump, 17-cooling water delivery pump, 18-electrolytic cell, 19-buffer air tank, 20-hydrogen storage tank, 21-hydrogen-powered ship, 22-low liquid level alarm switch, 23-cooling water inlet, 24-platform drain system. DETAILED DESCRIPTION

[0021] The present application is further described in conjunction with the accompanying drawings.

[0022] An offshore hydrogen production platform hydrogen production equipment cooling system, such as Figure 1As shown, it comprises: air-cooled radiator 1, expansion tank 2, hydrogen production equipment (hydrogen production equipment includes: gas-liquid processor 3, refrigerated water unit 4, hydrogen purification device 5, hydrogen compressor 6, hydrogen compressor 7, hydrogen filling machine 8), water replenishment buffer air tank 9, temperature sensor 10, pressure gauge 11, temperature sensor 12, pressure gauge 13, sampling valve 14, water replenishment pipeline, cooling water inlet pipeline, cooling water return pipeline, cooling water delivery pump 16, cooling water delivery pump 17, discharge pipeline. Among them, the air-cooled radiator 1 and the expansion tank 2 are arranged in the open area of the platform main deck to meet the offshore corrosion prevention requirements, and other hydrogen production equipment and cooling water delivery pumps are arranged in the hydrogen production equipment room under the main deck.

[0023] The air-cooled radiator 1 is provided with three sets, one for use and one for standby. Each air-cooled radiator 1 is provided with a water replenishment inlet, a water outlet, a return water inlet and a discharge port.

[0024] The expansion tank 2 is provided with a cooling water inlet, an overflow port, a water replenishment inlet, a discharge port and a low liquid level alarm switch. A certain amount of water is required in the expansion tank. When the liquid level is low, the low liquid level alarm switch 22 is set to alarm, thereby ensuring the water level in the expansion tank.

[0025] The water replenishment pipeline includes the expansion tank to the air-cooled radiator water replenishment pipeline, the expansion tank to the water replenishment buffer air tank 9 inlet water replenishment pipeline and the water outlet of the water replenishment buffer air tank 9 to each hydrogen production equipment water replenishment pipeline. According to the use of the air-cooled radiator and the hydrogen production equipment, regular water replenishment is required. Among them, the first water outlet of the expansion tank 2 is communicated with the water replenishment inlet of the air-cooled radiator 1. The second water outlet of the expansion tank 2 is communicated with the water inlet of the water replenishment buffer air tank 9. The water outlet of the water replenishment buffer air tank 9 is communicated with the water replenishment inlets of each hydrogen production equipment. The water replenishment buffer air tank 9 is provided with one water inlet and three water outlets, one of which is a standby outlet.

[0026] The cooling water inlet pipeline includes the air-cooled radiator 1 outlet main pipeline to each hydrogen production equipment cooling water inlet pipeline and the temperature sensor 10 and pressure gauge 11 on the main pipeline. Among them, the air-cooled radiator 1 water outlet main pipeline is communicated with the cooling water inlet of the gas-liquid processor 3. The air-cooled radiator 1 water outlet main pipeline is communicated with the cooling water inlet of the refrigerated unit 4. The air-cooled radiator 1 water outlet main pipeline is communicated with the cooling water inlet of the hydrogen compressor 6.

[0027] The air-cooled radiator 1 water outlet main pipeline is communicated with the cooling water inlet of the hydrogen compressor 7. The air-cooled radiator 1 water outlet main pipeline is communicated with the cooling water inlet of the hydrogen filling machine 8. The low-temperature water outlet of the refrigerated unit 4 is communicated with the low-temperature water inlet of the hydrogen purification device 5. The temperature sensor 10 and the pressure gauge 11 are installed on the air-cooled radiator 1 water outlet main pipeline. The temperature sensor on the water inlet main pipeline monitors the cooling water inlet temperature of each equipment, and the pressure gauge monitors the cooling water inlet pressure.

[0028] The cooling water return pipeline comprises a cooling water outlet pipeline of each hydrogen production equipment to a water return manifold of the air-cooled radiator 1, and a cooling water delivery pump 16, a cooling water delivery pump 17, a temperature sensor 12, a pressure gauge 13 and a sampling valve 14 installed on the manifold, wherein the cooling water outlet of the gas-liquid processor 3 is communicated with the water return manifold of the air-cooled radiator 1. The cooling water outlet of the refrigeration unit 4 is communicated with the water return manifold of the air-cooled radiator 1. The cooling water outlet of the hydrogen compressor 6 is communicated with the water return manifold of the air-cooled radiator 1. The cooling water outlet of the hydrogen compressor 7 is communicated with the water return manifold of the air-cooled radiator 1. The cooling water outlet of the hydrogenation machine 8 is communicated with the water return manifold of the air-cooled radiator 1. The low-temperature water outlet of the hydrogen purification device 5 is communicated with the low-temperature water inlet of the refrigeration unit 4. The temperature sensor 12, the pressure 13 and the sampling valve 14 are installed on the water return manifold of the air-cooled radiator 1. The cooling water delivery pump 16 and the cooling water delivery pump 17 are installed on the water return manifold of the air-cooled radiator 1, and the two cooling water delivery pumps are connected in parallel and then connected in series to the water return manifold, and one of the two cooling water delivery pumps is used as a backup. The cooling water in each cooling equipment can be quickly cooled in the air-cooled radiator 1 through the cooling water delivery pumps arranged on the cooling water return manifold, and the cooling water circulation is completed. The temperature sensor arranged on the cooling water return manifold is used to monitor the cooling water return temperature of each equipment, the pressure gauge is used to monitor the cooling water return pressure, and the sampling valve is used to sample and detect the water quality. If the cooling water quality does not meet the requirements, it needs to be replaced in time.

[0029] The discharge pipeline comprises an expansion tank discharge pipeline, an overflow pipeline and an air-cooled radiator discharge pipeline, wherein the expansion tank 2 discharge pipeline, the overflow pipeline and the air-cooled radiator 1 discharge pipeline are connected to a discharge system on the platform. The lowest point of the cooling water return pipeline outlet of each hydrogen production equipment is provided with a discharge valve 15. The cooling water in the system needs to be replaced after a certain period of use, and can be discharged through the discharge valve 15.

[0030] The offshore hydrogen production platform hydrogen production equipment cooling system provided by the application comprises a wind-cooled radiator 1, an expansion water tank 2, hydrogen production equipment, a water supplement pipeline, a cooling water inlet pipeline, a cooling water return pipeline and a discharge pipeline. Three wind-cooled radiators are arranged and installed in the open area of the main deck, one of which is used as a backup, and each hydrogen production equipment and the connecting pipeline are arranged and installed in the hydrogen production equipment room below the main deck. The wind-cooled radiator is installed in the open and ventilated area of the main deck. When the system is working, three wind-cooled radiators are arranged on the main deck, two of which are used normally and one of which is used as a backup. The cooling water in the wind-cooled radiator can directly enter each hydrogen production equipment through gravity. The cooling water return of each hydrogen production equipment is transported back to the wind-cooled radiator by the two cooling water transport pumps arranged. The expansion water tank is used for water supplement of each hydrogen production equipment and the cooling water pipeline, and the water supplement is supplemented by gravity. The water supplement buffer air tank 9 is installed above each equipment in the hydrogen production equipment room, and the cooling water is supplemented to the equipment by gravity. A water inlet pipe is arranged above the water supplement buffer air tank 9, and three water outlet pipes are arranged below the water inlet pipe. If only one water supplement pipeline is arranged to each equipment, the pipeline may be easily gassed. If each equipment is provided with one water supplement pipeline from the expansion water tank 2, too many pipelines will be increased, which is not economical and is not convenient to install. Therefore, the above-mentioned arrangement can completely solve the gassing of each pipeline and the economic requirement. The expansion water tank and the wind-cooled radiator are provided with a discharge port, which can be discharged to the platform discharge system 24 through the pipeline connection. The wind-cooled radiator provides cooling fresh water to each hydrogen production equipment to complete the cooling requirement of each hydrogen production equipment. It should be noted that the expansion water tank 2 and the wind-cooled radiator are installed on the outdoor main deck, and the cooling water is provided with an antifreeze solution to ensure the smooth operation of the entire cooling system in the case of low temperature in winter.

[0031] The offshore hydrogen production platform hydrogen production equipment cooling system provided by the application cools each hydrogen production equipment by fresh water, and the required fresh water is cooled by the wind-cooled radiator arranged on the platform main deck, which can improve the cooling efficiency, without the need to set up a seawater pump and a related plate cooler to cool the fresh water, and without the need to worry about the water quality cleanliness problem of the radiator. The application is particularly suitable for offshore, shallow sea areas and fixed hydrogen production platforms. It should be noted that the specific parameter requirements of the wind-cooled radiator need to be set according to the specific cooling water requirements of each hydrogen production equipment.

Claims

1. A hydrogen production plant cooling system for an offshore hydrogen production platform, characterized in that, The hydrogen production system comprises a gas-liquid processor, a hydrogen purification device, a refrigeration water machine, a hydrogen compressor, a hydrogen filling machine, the gas-liquid processor is connected with the electrolytic cell, the gas-liquid processor outlet is sequentially connected with the hydrogen passivation device, the first hydrogen compressor, the buffer gas tank, the second hydrogen compressor, the hydrogen storage tank and the hydrogen filling machine, the hydrogen filling machine is connected with the hydrogen-powered ship to provide hydrogen for the hydrogen-powered ship, the refrigeration unit is connected with the hydrogen passivation device through a pipeline to form a circulating pipeline; The expansion water tank is connected with the air-cooled radiator, the gas-liquid processor, the refrigeration unit, the first hydrogen compressor and the hydrogen filling machine through pipelines, the expansion water tank is connected with the gas-liquid processor, the refrigeration unit, the hydrogen compressor and the hydrogen filling machine through a buffer air tank, the water outlet of the air-cooled radiator is connected with the gas-liquid processor, the refrigeration unit, the hydrogen compressor and the hydrogen filling machine through pipelines, and cooling fresh water flows in the pipelines; The fresh water cooled by the gas-liquid processor, the refrigeration unit, the hydrogen compressor and the hydrogen filling machine is returned to the air-cooled radiator through a cooling water delivery pump and a pipeline connected with the water return port of the air-cooled radiator.

2. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, characterized in that, The air-cooled radiator and the expansion water tank are arranged in the open area of the main deck of the platform, and the gas-liquid processor, the refrigeration unit, the hydrogen passivation device, the hydrogen compressor and the hydrogen filling machine are arranged in the hydrogen production equipment mechanical room under the main deck.

3. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, characterized in that, The air-cooled radiator and the expansion water tank are provided with discharge ports connected with the platform discharge system through pipelines, and the expansion water tank is further provided with a cooling water inlet, an overflow port and a low liquid level alarm switch.

4. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, characterized in that, Temperature sensors and pressure gauges are arranged on the pipelines of the air-cooled radiator connected with the gas-liquid processor, the refrigeration unit, the hydrogen compressor and the hydrogen filling machine, and pressure gauges, sampling valves and temperature sensors are sequentially arranged on the return circuits of the gas-liquid processor, the refrigeration unit, the hydrogen compressor and the hydrogen filling machine connected with the air-cooled radiator.

5. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, characterized in that, Discharge valves are arranged at the outlets of the gas-liquid processor, the refrigeration unit, the first hydrogen compressor and the hydrogen filling machine connected with the return circuits of the air-cooled radiator.

6. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, characterized in that, The expansion water tank is provided with three water supply ports, one of which is a standby water supply port.

7. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, wherein, The system is provided with three air-cooled radiators, one of which is a standby air-cooled radiator.

8. A hydrogen production equipment cooling system for an offshore hydrogen production platform according to claim 1, characterized in that, There are two cooling water delivery pumps.

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