Seawater cooling device for producing hydrogen by electrolyzing water at sea and hydrogen production process system

Abstract

The utility model relates to the technical field of hydrogen energy, and particularly discloses a seawater cooling device and a hydrogen production process system for producing hydrogen by electrolyzing water at sea, which comprise a cooling component which is at least partially positioned below the water level of seawater and is connected with a hydrogen production system, the cooling assembly comprises a cooling cabin and a heat exchange assembly which is located in the cooling cabin and connected with the hydrogen production system. According to the utility model, seawater lower than air is used as a cold source in a marine environment, so that the cooling efficiency is greatly improved, and the safe operation of an electrolytic hydrogen production system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen energy technical field more particularly, relate to a seawater cooling device and hydrogen production process system of sea water electrolysis hydrogen production. BACKGROUND

[0002] The electric energy consumed in the process of water electrolysis hydrogen production is greater than the theoretical electric energy required by the water electrolysis reaction, and the excess heat released will cause the temperature of the electrolysis reaction zone to rise. In order to maintain the normal temperature of the electrolysis reaction zone, the excess heat needs to be taken away by cooling water. At present, on land, water cooling method is generally used, circulating cooling water is introduced into the equipment for cooling, and then the cooling water is cooled by external air cooler, and finally the heat is released to the ambient air.

[0003] Under the scenario of offshore hydrogen production, ambient air is no longer the best choice for the final heat sink. On the one hand, the cooling effect of air is limited, and as the scale of offshore hydrogen production continues to expand, the loss will gradually increase, and the heat dissipation performance of air is slightly insufficient. On the other hand, the humidity and salt mist content of offshore air are higher than those on land, and there is a risk of atmospheric corrosion.

[0004] Seawater resources are abundant and stable in temperature, with a specific heat capacity of about 4 times that of air, and a higher cooling efficiency than air, which is an ideal heat sink for offshore hydrogen production scenario, but the existing water electrolysis hydrogen production cooling scheme on land needs to be optimized in combination with the system characteristics of offshore hydrogen production. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to provide a seawater cooling device and hydrogen production process system for sea water electrolysis hydrogen production;

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A seawater cooling device for sea water electrolysis hydrogen production is used to cool the hydrogen production system; the device comprises a cooling assembly located at least partially below the sea level and connected to the hydrogen production system;

[0008] The cooling assembly comprises a cooling cabin and a heat exchange assembly located in the cooling cabin and connected to the hydrogen production system.

[0009] In some possible embodiments, the cooling cabin comprises a bottom plate, a filter screen installed on the bottom plate and cooperating with the bottom plate to form a cavity, and a top cover installed on the filter screen; the heat exchange assembly is installed in the cavity and connected to the hydrogen production system through the top cover.

[0010] In some possible embodiments, the cooling cabin further comprises a stirrer located in the cavity and used to stir the seawater entering the cavity.

[0011] In some possible implementation manners, the heat exchange assembly comprises a heat exchange pump installed in the installation cavity, a heat exchanger connected with the heat exchange pump, heat exchange components connected with the heat exchanger and the hydrogen production system respectively, and a pipeline one connected with the heat exchanger and the hydrogen production system and matched with the heat exchange coil to form a circulation pipeline; one end of the heat exchange pump is located outside the cooling cabin and used for extracting deep sea water.

[0012] In some possible implementation manners, the heat exchange components comprise a coil one end of which is connected with the heat exchanger, and a pipeline two connected with the other end of the coil and the hydrogen production system respectively.

[0013] In some possible implementation manners, a circulation pump is arranged on the pipeline one.

[0014] In some possible implementation manners, a temperature sensor for monitoring the temperature of the sea water in the cooling cabin and a pressure sensor for monitoring the pressure in the cooling cabin are arranged in the cooling cabin.

[0015] A hydrogen production process system of a sea water cooling device comprises a floating platform arranged on the sea level, a hydrogen production system installed on the floating platform, and a sea water cooling device connected with the hydrogen production system and as described above.

[0016] In some possible implementation manners, the hydrogen production system comprises a pure water system for treating sea water into electrolysis water, a raw water / alkali liquor circulation system connected with the pure water system, a raw water / alkali liquor cooler and a gas-liquid separation system connected with the raw water / alkali liquor circulation system respectively, an electrolytic cell connected with the raw water / alkali liquor cooler and the gas-liquid separation system respectively, and a hydrogen gas cooler connected with the gas separation system; the hydrogen gas cooler and the raw water / alkali liquor cooler are connected with the sea water cooling device respectively.

[0017] In some possible implementation manners, a control unit connected with the hydrogen production system and the sea water cooling device is further included.

[0018] Compared with the prior art, the hydrogen production process system of the sea water cooling device has the following beneficial effects:

[0019] The hydrogen production process system of the sea water cooling device uses sea water as a cold source, which is lower than air, and the cooling efficiency is greatly improved, and the safe operation of the electrolytic hydrogen production system is ensured.

[0020] The hydrogen production process system of the sea water cooling device only needs to immerse the cooling cabin in sea water to realize the basic heat exchange function, and natural heat exchange is performed with the heat exchange coil under the driving of sea water current, no external artificial cold source is input, the cooling energy consumption tends to be 0, and the system energy consumption is greatly reduced.

[0021] The hydrogen production process system of the sea water cooling device can effectively realize the increase of the sea water flow in the cooling cabin and improve the cooling efficiency by arranging the stirrer.

[0022] The utility model discloses a heat pump and heat exchanger are set up, realize when sea surface water temperature is too high, through the heat pump extraction deep sea water, through deep sea water for heat exchange piece cooling, further realize heat exchange. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure diagram of sea water cooling device in the utility model;

[0024] Figure 2 It is the structure diagram of hydrogen production process system of the utility model;

[0025] 1, cooling cabin, 2, filter screen, 3, heat pump, 4, heat exchanger, 5, heat exchange piece, 6, pipeline one, 7, agitator, 8, circulating pump, 9, top cover, 10, hydrogen production system, 101, pure water system, 102, raw material water / lye circulating system, 103, raw material water / lye cooler, 104, electrolytic cell, 105, gas-liquid separation system, 106, hydrogen cooler, 107, control unit, 20, sea water cooling device. DETAILED DESCRIPTION

[0026] In the utility model, unless another explicit provision and limitation, the terms "installation", "link", "connection", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral ; It can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. The " first " of the present application, " second " and similar words do not represent any order, quantity or importance, but only distinguish different components. Similarly, " one " or " a " and similar words do not represent quantity limit, but represent the existence of at least one. In the implementation of the present application, the association relationship of the associated object is described as " and / or ", which means that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of " multiple " is two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0027] The utility model will be explained in detail below.

[0028] As Figure 1 As shown in a kind of sea water cooling device 20 for offshore electrolytic water hydrogen production, for cooling hydrogen production system 10;Including at least part is located below sea level and is connected with hydrogen production system 10 cooling assembly;

[0029] The cooling assembly comprises a cooling cabin 1, a heat exchange assembly arranged in the cooling cabin 1 and connected with the hydrogen production system 10.

[0030] The cooling cabin 1 comprises a bottom plate, a filter screen 2 arranged on the bottom plate and cooperating with the bottom plate to form a cavity, and a top cover 9 arranged on the filter screen 2; and the heat exchange assembly is arranged on the bottom plate and connected with the hydrogen production system 10 through the top cover 9.

[0031] The heat exchange assembly is arranged in the cavity formed by the bottom plate and the filter screen 2; in use, seawater enters the cavity through the filter screen 2, exchanges heat with the hydrogen production system 10 through the heat exchange assembly, and realizes cooling heat exchange for the hydrogen production system 10, so that the hydrogen production system 10 can realize normal hydrogen production.

[0032] The filter screen 2 is arranged to preliminarily filter the seawater entering the cavity, so that large sand and fish in the seawater are blocked outside the cooling cabin 1, and damage to the heat exchange assembly is avoided.

[0033] In some possible implementation manners, in order to accelerate the flow of seawater in the cooling cabin 1 and thus improve the heat exchange efficiency, the cooling cabin 1 further comprises a stirrer 7 arranged in the cavity and used for stirring the seawater entering the cavity.

[0034] Specifically, when it is monitored that the temperature in the cooling cabin 1 is too high and the natural heat exchange mode relying on seawater ocean current cannot meet the heat dissipation requirement, the stirrer 7 is controlled to disturb the seawater in the cooling cabin 1, so as to improve the system heat exchange efficiency.

[0035] In some possible implementation manners, the heat exchange assembly comprises a heat exchange pump 3 arranged in the cavity, a heat exchanger 4 connected with the heat exchange pump 3, a heat exchange element 5 connected with the heat exchanger 4 and the hydrogen production system 10 respectively, and a pipeline one 6 connected with the heat exchanger 4 and the hydrogen production system 10 and cooperating with a heat exchange coil to form a circulation pipeline; one end of the heat exchange pump 3 is located outside the cooling cabin 1 and used for extracting deep seawater; the heat exchanger 4 is provided with a pipeline in communication with seawater, and seawater after heat exchange in the heat exchanger 4 can be discharged.

[0036] In some possible implementation manners, in order to effectively form a cooling circulation loop through the heat exchange element 5 and the hydrogen production system 10, the heat exchange element 5 comprises a coil connected with one end of the heat exchanger 4, and a pipeline two connected with the other end of the coil and the hydrogen production system 10 respectively; and a circulating pump 8 is arranged on the pipeline one 6; of course, the heat exchange element 5 can also adopt a plate type or a tube-shell type heat exchanger.

[0037] The cooling medium of the heat exchange element 5 enters the hydrogen production system 10 to exchange heat, is driven by the circulating pump 8 to enter the cooling cabin 1 through the pipeline one 6, exchanges heat with seawater in the cooling cabin 1 through the coil, and then enters the hydrogen production system 10 through the pipeline two again to realize heat exchange for the hydrogen production system 10.

[0038] The coil is spiral-shaped, which greatly increases the flow path of the cooling medium in the cooling chamber 1, increases the heat exchange area, and improves the heat exchange efficiency.

[0039] When the seawater temperature in the cooling chamber 1 is high, and the agitator 7 accelerates the seawater flow but still cannot achieve heat exchange for the hydrogen production system 10, deep seawater is drawn into the heat exchanger 4 by the heat exchange pump 3. The deep seawater with a lower temperature is used to exchange heat between the seawater in the cooling chamber 1 and the heat exchange components 5, thereby achieving heat exchange for the hydrogen production system 10.

[0040] In some possible implementations, a temperature sensor for monitoring the seawater temperature inside the cooling chamber 1 and a pressure sensor for monitoring the pressure inside the cooling chamber 1 are provided inside the cooling chamber 1.

[0041] Setting up a temperature sensor enables monitoring of seawater temperature, thereby achieving a three-stage cooling and heat exchange mode at different temperatures, either heat exchanger 5, heat exchanger 5 + stirrer 7, or heat exchanger 4 + stirrer 7 + heat exchanger 4. The basic heat exchange function only requires heat exchanger 5 to exchange heat with seawater, and the cooling energy consumption is close to 0, resulting in a significant reduction in system energy consumption.

[0042] like Figure 1 , Figure 2 As shown, a hydrogen production process system of a seawater cooling device 20 includes a floating platform set on the sea surface, a hydrogen production system 10 installed on the floating platform, and a seawater cooling device 20 connected to the hydrogen production system 10 as described above.

[0043] A floating platform is set up on the sea surface to install the hydrogen production system 10. A seawater cooling device 20, which is at least partially submerged below the sea surface, is connected to the hydrogen production system 10 to realize the use of seawater as a cold source for heat exchange and cooling of the hydrogen production system 10.

[0044] Furthermore, in order to save space at sea, the entire seawater cooling device 20 can be submerged below sea level.

[0045] In some possible implementations, in order to effectively produce hydrogen from seawater, the hydrogen production system 10 includes a pure water system 101 for treating seawater into water for electrolysis, a raw water / alkali solution circulation system 102 connected to the pure water system 101, a raw water / alkali solution cooler 103 and a gas-liquid separation system 105 respectively connected to the raw water / alkali solution circulation system 102, an electrolyzer 104 respectively connected to the raw water / alkali solution cooler 103 and the gas-liquid separation system 105, and a hydrogen cooler 106 connected to the gas separation system; the hydrogen cooler 106 and the raw water / alkali solution cooler 103 are respectively connected to the seawater cooling device 20.

[0046] Specifically, seawater enters the pure water system 101, which can use reverse osmosis membranes and softening devices to treat the seawater, desalinate and purify it, and obtain electrolytic water after treatment. The electrolytic water enters the raw water / alkali solution circulation system 102, is cooled by the raw water / alkali solution cooler 103, and then enters the electrolytic cell 104.

[0047] Electrolyzer 104 decomposes water into hydrogen and oxygen using electric current; specifically, electrolyzer 104 can be an alkaline or PEM electrolyzer 104, which can better adapt to fluctuating power environments such as offshore wind power.

[0048] The gas-liquid separation system 105 is responsible for separating the liquid water and water vapor carried in the hydrogen and oxygen generated by electrolysis in the electrolyzer 104. The separated oxygen is discharged or stored for use. The separated hydrogen is cooled by the hydrogen cooler 106 and then purified before entering the downstream process. The separated water is returned to the raw water / alkali solution circulation system 102.

[0049] In some possible implementations, a control unit connected to the hydrogen production system 10 and the seawater cooling device 20 is also included; specifically, the purification system, electrolyzer 104, temperature sensor, pressure sensor, stirrer 7, heat pump 3, heat exchanger 4, and circulation pump 8 are respectively connected to the control unit.

[0050] Specifically, when the temperature sensor system detects that the temperature is too high, and the control unit calculates that relying on the natural heat exchange method of seawater currents is insufficient to meet the heat dissipation requirements, the control unit operates the stirrer 7 to disturb the seawater and improve the system's heat exchange efficiency.

[0051] When the temperature sensor detects that the sea surface temperature is too high or the pressure sensor system load exceeds expectations, the control unit calculates that deep seawater with a low and relatively stable temperature needs to be used as an auxiliary cooling source. The control unit then uses heat exchange pump 3 to draw cold water from the deeper sea area and introduce it into heat exchanger 4 for rapid heat dissipation of the system.

[0052] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A seawater cooling device for electrolysis of seawater for hydrogen production at sea, for cooling a hydrogen production system; characterized in that, The application relates to a seawater cooling device, which comprises a cooling assembly connected with a hydrogen production system and located at least partially below the sea level. The cooling assembly comprises a cooling cabin, a heat exchange assembly located in the cooling cabin and connected with the hydrogen production system. The cooling cabin comprises a bottom plate, a filter screen installed on the bottom plate and cooperating with the bottom plate to form a cavity, and a top cover installed on the filter screen; the heat exchange assembly is installed in the cavity and connected with the hydrogen production system through the top cover. The heat exchange assembly comprises a heat exchange pump installed in the cavity, a heat exchanger connected with the heat exchange pump, a heat exchange element connected with the heat exchanger and the hydrogen production system respectively, and a pipeline I connected with the heat exchanger and the hydrogen production system and cooperating with the heat exchange coil to form a circulation pipeline; one end of the heat exchange pump is located outside the cooling cabin and used for extracting deep seawater.

2. The seawater cooling device for electrolytic hydrogen production at sea according to claim 1, characterized by The cooling cabin further comprises an agitator located in the cavity and used for agitating seawater entering the cavity.

3. The seawater cooling device for electrolytic hydrogen production at sea according to claim 1, characterized by The heat exchange element comprises a coil connected with one end of the heat exchanger, and a pipeline II connected with the other end of the coil and the hydrogen production system respectively.

4. The seawater cooling device for electrolytic hydrogen production at sea according to claim 1, characterized by A circulation pump is arranged on the pipeline I.

5. The seawater cooling device for electrolytic hydrogen production at sea according to any one of claims 1 to 4, characterized in that, A temperature sensor for monitoring the temperature of seawater in the cooling cabin and a pressure sensor for monitoring the pressure in the cooling cabin are arranged in the cooling cabin.

6. A hydrogen production process system, characterized by, The application further relates to a floating platform arranged on the sea level, a hydrogen production system installed on the floating platform, and the seawater cooling device connected with the hydrogen production system and as claimed in any one of claims 1-5.

7. The hydrogen production process system of claim 6, wherein, The hydrogen production system comprises a pure water system for treating seawater into electrolysis water, a raw water / alkali liquor circulation system connected with the pure water system, a raw water / alkali liquor cooler and a gas-liquid separation system connected with the raw water / alkali liquor circulation system respectively, an electrolytic tank connected with the raw water / alkali liquor cooler and the gas-liquid separation system respectively, and a hydrogen cooler connected with the gas-liquid separation system; the hydrogen cooler and the raw water / alkali liquor cooler are connected with the seawater cooling device respectively.

8. The hydrogen production process system of claim 7, wherein, The application further relates to a control unit connected with the hydrogen production system and the seawater cooling device.

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