Seawater hydrogen production and desalination system

Abstract

The utility model relates to the technical field of hydrogen production by alkaline electrolyzed water, in particular to a seawater hydrogen production and desalination system. The embodiment of the utility model provides a seawater hydrogen production desalting system. The seawater hydrogen production desalting system comprises a cooling desalting device, a water outlet of the seawater filtering device is communicated with a water inlet of the cooling desalting device; and the cooling desalting device is provided with a reflux inlet, and the reflux inlet is communicated with the water inlet of the seawater filtering device. The cooling and desalting device is connected with the water inlet of the seawater filtering device, so that seawater circulation can be realized, the utilization rate of seawater is further improved, the seawater desalination cost is further reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by alkaline water electrolysis, and in particular to a seawater hydrogen production and desalination system. Background Art

[0002] Seawater desalination equipment basically uses reverse osmosis and low-temperature multi-effect distillation processes, which consume huge amounts of electricity and heat, making the cost of producing fresh water from seawater desalination equipment very high. If a seawater direct cooling system is used, the energy consumption of the seawater intake pump is high and the economy is poor. The high cost of producing fresh water and the huge consumption of electricity and heat are issues that need to be addressed urgently. Utility Model Content

[0003] The utility model aims to provide a seawater hydrogen production and desalination system to solve the above problems.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a seawater hydrogen production and desalination system, including: a cooling and desalination device;

[0005] a seawater filtering device, wherein a water outlet of the seawater filtering device is connected to a water inlet of the cooling and desalination device; and

[0006] The cooling and desalination device has a reflux port, which is communicated with the water inlet of the seawater filtering device.

[0007] Furthermore, a micro-salt detector is provided on the cooling and desalination device.

[0008] Furthermore, a salt discharge port is provided at the bottom of the cooling and desalination device.

[0009] Furthermore, the seawater hydrogen production and desalination system further comprises a seawater tank, the top of which is provided with a water inlet and a vent; and

[0010] The bottom of the seawater tank is provided with a water outlet, and the water outlet of the seawater tank is communicated with the water inlet of the seawater filtering device.

[0011] Furthermore, a liquid level gauge is provided on one side of the seawater tank, and the liquid level gauge is connected to the water inlet of the seawater tank.

[0012] Furthermore, a plurality of UF ultrafiltration membrane groups and EDI membrane groups are arranged at equal intervals inside the seawater filtration device.

[0013] Furthermore, the seawater hydrogen production and desalination system also includes an electrolytic hydrogen production device, and the cooling and desalination device is connected to the electrolytic hydrogen production device.

[0014] Furthermore, the seawater hydrogen production and desalination system has a chiller inside, and the cooling and desalination device is connected to the chiller.

[0015] Furthermore, the electrolytic hydrogen production device is further provided with an alkali liquid cooler, an alkali liquid filter, an electrolytic cell and a separator which are connected in sequence;

[0016] The cooling and desalting device is connected to the water inlet of the alkali liquid cooler; and

[0017] The separator is communicated with the water inlet of the alkali liquid cooler.

[0018] Furthermore, a water replenishment pump is provided between the cooling and desalination device and the electrolytic hydrogen production device.

[0019] Furthermore, the seawater tank, the seawater filtering device, the cooling and desalination device, the water replenishment pump and the electrolytic hydrogen production device are all made of stainless steel.

[0020] Compared with the prior art, the embodiments of the utility model have the following beneficial effects: by connecting the cooling and desalination device with the water inlet of the seawater filtration device, the circulation of seawater can be achieved, thereby improving the utilization rate of seawater, thereby reducing the cost of seawater desalination and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 The schematic diagram of the structure of the seawater hydrogen production and desalination system of the utility model is shown;

[0023] Figure 2 Shows Figure 1 A partial enlarged view of part A;

[0024] Figure 3 Shows Figure 1 A partial enlarged view of part B.

[0025] In the figure:

[0026] 1. Cooling and desalting device; 11. Reflux port; 12. Micro-salt detector; 13. Salt discharge port;

[0027] 2. Seawater filtration device;

[0028] 3. Seawater tank; 31. Liquid level gauge;

[0029] 4. Electrolytic hydrogen production device; 41. Chiller; 42. Alkali solution cooler; 43. Alkali solution filter; 44. Electrolytic cell; 45. Separator;

[0030] 5. Water supply pump. DETAILED DESCRIPTION

[0031] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0032] In the embodiment, the desalination equipment basically adopts the process of reverse osmosis and low-temperature multi-effect distillation, which consumes huge amounts of electricity and heat, making the cost of producing fresh water from the desalination equipment very high. At the same time, it will aggravate the environmental problems caused by the greenhouse effect and violate the principle of green hydrogen development. If the seawater direct cooling system is adopted, the energy consumption of the seawater intake pump is high and the economic efficiency is poor.

[0033] like Figure 1 As shown, in order to solve the above problems, at least one embodiment provides a seawater hydrogen production and desalination system, including: a cooling desalination device 1 and a seawater filtering device 2. It is used to cool the seawater and remove the salt in the seawater to obtain fresh water. The seawater filtering device 2 is suitable for filtering impurities in seawater. In some embodiments, the water outlet of the seawater filtering device 2 is connected to the water inlet of the cooling desalination device 1 to achieve the process of filtering the seawater first and then cooling and desalting. At the same time, the cooling desalination device 1 has a reflux port 11, which is connected to the water inlet of the seawater filtering device 2. Through the above arrangement, when the cooling desalination device 1 desalinates the seawater, some seawater will not be desalinated or the desalination is incomplete. In this case, qualified fresh water cannot be obtained. In the subsequent process, this part of the seawater returns to the water inlet of the cooling desalination device 1 through the reflux port 11, and enters the cooling desalination device 1 again, and is desalinated again, and the seawater newly entering the cooling desalination device 1 is cooled, thereby realizing the recycling of seawater and the effect of saving energy.

[0034] like Figure 2 As shown, in order to determine whether the desalination of seawater by the cooling and desalination device 1 is qualified, in some embodiments, a micro-salt detector 12 is provided on the cooling and desalination device 1. If the desalination degree of seawater in the cooling and desalination device 1 is qualified, it can flow out of the cooling and desalination device 1 and enter the next process. If the desalination degree of seawater in the cooling and desalination device 1 is unqualified, the reflux port 11 is opened, and the seawater returns to the water inlet of the cooling and desalination device 1 from the reflux port 11. Preferably, the heat exchanger of the cooling and desalination device 1 is a shell and tube heat exchanger, which has a good heat exchange effect.

[0035] like Figure 2 As shown, in some embodiments, a salt discharge port 13 is provided at the bottom of the cooling and desalting device 1. Salt precipitated after the seawater is cooled can be discharged from the cooling and desalting device 1 through the salt discharge port 13.

[0036] To store seawater, Figure 2As shown, in some embodiments, the seawater hydrogen production and desalination system further includes a seawater tank 3. At the same time, the top of the seawater tank 3 has a water inlet and a vent, the bottom of the seawater tank 3 has a water outlet, and the water outlet of the seawater tank 3 is connected to the water inlet of the seawater filtration device 2. The water outlet of the seawater tank 3 is arranged at the bottom of the seawater tank 3 to reduce the flow power of seawater. The vent can balance the air pressure inside the seawater tank 3 to prevent seawater from being sucked back.

[0037] In order to conveniently control the amount of seawater in the seawater tank 3, Figure 2 As shown, in some embodiments, a liquid level meter 31 is provided on one side of the seawater tank 3 , and the liquid level meter 31 is connected to the water inlet of the seawater tank 3 .

[0038] In some embodiments, in order to ensure the filtering degree of the seawater filtering device 2 , a plurality of UF ultrafiltration membrane groups and EDI membrane groups are arranged at equal intervals inside the seawater filtering device 2 .

[0039] After filtering and desalinating the seawater, the fresh water needs to be electrolyzed to separate oxygen and hydrogen. In some embodiments, the seawater hydrogen production and desalination system also includes an electrolysis hydrogen production device 4, and the cooling and desalination device 1 is connected to the electrolysis hydrogen production device 4.

[0040] In some embodiments, the seawater hydrogen production and desalination system has a chiller 41 inside, and the cooling desalination device 1 is connected to the chiller 41. The cooled fresh water treated by the cooling desalination device 1 enters the chiller 41, which can cool the water in the chiller 41 and further reduce the energy consumption of the chiller 41.

[0041] like Figure 3 As shown, in some embodiments, the electrolytic hydrogen production device 4 is further provided with an alkali liquid cooler 42, an alkali liquid filter 43, an electrolytic cell 44 and a separator 45 which are connected in sequence. The cooling desalination device 1 is connected to the water inlet of the alkali liquid cooler 42. The separator 45 is connected to the water inlet of the alkali liquid cooler 42. Through the above arrangement, the fresh water in the cooling desalination device 1 is connected to the alkali liquid cooler 42, the alkali liquid filter 43, the electrolytic cell 44 and the separator 45 which are connected in sequence, and then returns to the alkali liquid cooler 42 through the separator 45 to realize the seawater circulation. At the same time, the fresh water in the cooling desalination device 1 can also enter the cooling water machine, and then enter the alkali liquid cooler 42 through the cooling water machine. After the fresh water in the cooling desalination device 1 enters the cooling water machine, it can perform heat exchange with the fresh water to be cooled in the cooling water machine, thereby reducing the energy consumption of the cooling water machine. The separator can be divided into a hydrogen separator and an oxygen separator. After the electrolyzer 44 electrolyzes the fresh water, the hydrogen separator and the oxygen separator separate hydrogen and oxygen respectively. The excess fresh water in the hydrogen separator and the oxygen separator can be returned to the alkali liquid cooler 42 for the next cycle.

[0042] like Figure 2 As shown, in order to pump the water in the cooling and desalting device 1 into the electrolytic hydrogen production device 4, in some embodiments, a water replenishment pump 5 is further provided between the cooling and desalting device 1 and the electrolytic hydrogen production device 4. Preferably, the water inlet and the water outlet of the water replenishment pump 5 are connected to the water outlet of the cooling and desalting device 1 and the water inlet of the alkali liquid cooler 42, respectively.

[0043] In some embodiments, the seawater tank 3, the seawater filtering device 2, the cooling and desalination device 1, the water replenishment pump 5 and the electrolytic hydrogen production device 4 are all made of stainless steel, thereby effectively preventing seawater corrosion.

[0044] In at least one embodiment, valves are provided between the above-mentioned devices to enable selective opening and closing of various parts of the system.

[0045] It is worth mentioning that the technical features such as other components involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated.

[0046] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A seawater hydrogen production and desalination system, characterized in that: include: Cooling and desalting device (1); A seawater filtering device (2), wherein a water outlet of the seawater filtering device (2) is connected to a water inlet of the cooling and desalination device (1); and The cooling and desalination device (1) has a reflux port (11), and the reflux port (11) is connected to the water inlet of the seawater filtering device (2).

2. The seawater hydrogen production and desalination system according to claim 1, characterized in that: The cooling and desalination device (1) is provided with a micro-salt detector (12).

3. The seawater hydrogen production and desalination system according to claim 1, characterized in that: The bottom of the cooling and desalting device (1) is provided with a salt discharge port (13).

4. The seawater hydrogen production and desalination system according to claim 1, characterized in that: The seawater hydrogen production and desalination system further comprises a seawater tank (3), the top of the seawater tank (3) having a water inlet and a vent; and The bottom of the seawater tank (3) is provided with a water outlet, and the water outlet of the seawater tank (3) is in communication with the water inlet of the seawater filtering device (2).

5. The seawater hydrogen production and desalination system according to claim 4, characterized in that: A liquid level meter (31) is provided on one side of the seawater tank (3), and the liquid level meter (31) is connected to the water inlet of the seawater tank (3).

6. The seawater hydrogen production and desalination system according to claim 1, characterized in that: A plurality of UF ultrafiltration membrane groups and EDI membrane groups are arranged at equal intervals inside the seawater filtration device (2).

7. The seawater hydrogen production and desalination system according to claim 1, characterized in that: The seawater hydrogen production and desalination system further comprises an electrolytic hydrogen production device (4), and the cooling and desalination device (1) is in communication with the electrolytic hydrogen production device (4).

8. The seawater hydrogen production and desalination system according to claim 7, characterized in that: The seawater hydrogen production and desalination system has a chiller (41) inside, and the cooling and desalination device (1) is in communication with the chiller (41).

9. The seawater hydrogen production and desalination system according to claim 7, characterized in that: The electrolytic hydrogen production device (4) is further provided with an alkali liquid cooler (42), an alkali liquid filter (43), an electrolytic cell (44) and a separator (45) which are connected in sequence; The cooling and desalination device (1) is in communication with the water inlet of the alkali liquid cooler (42); and The separator (45) is in communication with a water inlet of the alkali liquid cooler (42).

10. The seawater hydrogen production and desalination system according to claim 7, characterized in that: A water replenishment pump (5) is also provided between the cooling and desalination device (1) and the electrolytic hydrogen production device (4).

11. The seawater hydrogen production and desalination system according to claim 10, characterized in that: The seawater tank (3), the seawater filtering device (2), the cooling and desalting device (1), the water replenishment pump (5) and the electrolytic hydrogen production device (4) are all made of stainless steel.

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