Device for butt joint of liquid nitrogen and liquid oxygen LNG (liquefied natural gas) cold energy with green ammonia and hydroxyl free radicals

Abstract

The utility model relates to a device for butting cold energy of liquid nitrogen and liquid oxygen LNG (Liquefied Natural Gas) with green ammonia and hydroxyl radicals, which aims at solving the technical problem that the cold energy recovery and utilization of the existing equipment are immature, and adopts the technical scheme that the device comprises air separation equipment, a liquid nitrogen cold energy recycling device and a liquid oxygen cold energy recycling device, and the air separation equipment is arranged at the upstream; the liquid nitrogen cold energy recycling device comprises a liquid nitrogen tank, a refrigeration house, a refrigerant pool, a liquid nitrogen gasifier, a liquid nitrogen vacuum hose, a nitrogen pressure pump and a high-pressure nitrogen tank, one path of the liquid nitrogen tank is connected with the refrigeration house, the other path of the liquid nitrogen tank is connected with the refrigerant pool, the refrigerant pool is filled with refrigerant liquid, and the refrigerant liquid is connected with the nitrogen pressure pump after flowing through the liquid nitrogen gasifier and then connected with the high-pressure nitrogen tank; the liquid oxygen and liquid nitrogen cold energy recycling device has the same structure and is finally connected with the high-pressure oxygen tank, and the ozone production device and the deep ultraviolet UVCLED280nm chip are integrated in the high-pressure oxygen tank. According to the device, cold energy recycling can be carried out on liquid nitrogen and liquid oxygen, green hydrogen and nitrogen are directly connected to regenerate green ammonia and a hydroxyl free radical full-closed-loop innovative industry chain, and recycling and recovery of cold energy are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold energy utilization equipment, and particularly relates to a device for connecting the cold energy of liquid nitrogen, liquid oxygen and LNG to green ammonia and hydroxyl radicals. Background Technique

[0002] The patent with the patent number ZL200910119669.1 discloses a multi-functional ice-temperature and quick-freezing integrated warehouse. In the process of industrial promotion of this patent, the scientific principle of realizing an ice-temperature cold storage warehouse is natural and scientific. However, it still uses the current Freon compression unit for refrigeration. Because of the Montreal Protocol of the United Nations, in order to protect the ozone layer and inhibit global warming, it is decided to reduce the use of Freon and other substances that damage the ozone layer of the earth's atmosphere. Using a Freon compression unit for refrigeration, its equipment cost and operating cost are still high and it is not feasible; 202010901073.3 discloses a liquid gas industrial application system, which uses the cold energy recycling of liquid nitrogen, liquid oxygen and LNG to complete the ice-temperature cold storage warehouse and cold chain logistics. However, there is not enough innovation in how to recycle the nitrogen and oxygen generated after the gasification of liquid nitrogen and liquid oxygen to generate economic benefits. Patents ZL2009101361928, ZL2013107043624, ZL2013107051620, ZL2013107005162, ZL2013107005162 disclose how to recycle the nitrogen released after the cold energy recycling of liquid nitrogen at -196°C to complete the ice-temperature cold storage warehouse and cold chain logistics? After the cold energy recycling of liquid oxygen at -183°C is used to complete the ice-temperature cold storage warehouse and cold chain logistics system, how to recycle the released pure oxygen? The cost of liquid nitrogen and liquid oxygen produced by the cold energy of liquefied natural gas LNG at -161.5°C for air separation is about 50% of the conventional air separation production cost. How to recycle the nitrogen and oxygen released after using this cold energy recycling to complete the ice-temperature cold storage warehouse and cold chain logistics? There is currently no effective solution. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a device for connecting the cold energy of liquid nitrogen, liquid oxygen and LNG to green ammonia and hydroxyl radicals.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A device for connecting the cold energy of liquid nitrogen, liquid oxygen and LNG to green ammonia and hydroxyl radicals, including an air separation device, a liquid nitrogen cold energy recycling and recovery device, and a liquid oxygen cold energy recycling and recovery device, wherein the air separation device is arranged upstream of the liquid nitrogen cold energy recycling and recovery device and the liquid oxygen cold energy recycling and recovery device;

[0006] The liquid nitrogen cold energy recycling device includes a liquid nitrogen tank, a cold storage, a refrigerant pool, a liquid nitrogen vaporizer, a liquid nitrogen vacuum hose, a nitrogen gas booster pump, and a high-pressure nitrogen gas tank. The outlet of the liquid nitrogen tank is divided into two paths and connected to the inlet of the cold storage through a liquid nitrogen vacuum hose, and the other path is connected to the inlet of the refrigerant pool. The refrigerant pool is filled with refrigerant liquid. The liquid nitrogen vaporizer is arranged in the refrigerant pool. The liquid nitrogen vacuum hose in the refrigerant pool passes through the liquid nitrogen vaporizer and then extends out from the outlet of the refrigerant pool to be connected to the inlet of the nitrogen gas booster pump. The outlet of the cold storage is also connected to the inlet of the nitrogen gas booster pump. The outlet of the nitrogen gas booster pump is connected to the high-pressure nitrogen gas tank through a compression device;

[0007] The liquid oxygen cold energy recycling device includes a liquid oxygen tank, a liquid oxygen vaporizer, a liquid oxygen vacuum hose, an oxygen booster pump, and a high-pressure oxygen gas tank. The outlet of the liquid oxygen tank is connected to the inlet of the refrigerant pool through a liquid oxygen vacuum hose. After the liquid oxygen vacuum hose passes through the liquid oxygen vaporizer in the refrigerant pool, it extends out from the outlet of the refrigerant pool and is connected to the oxygen booster pump. The oxygen booster pump is connected to the high-pressure oxygen gas tank through a compression device. An ozone generation device and a deep ultraviolet UVC LED 280nm chip for irradiating ozone to generate hydroxyl radicals are integrated in the high-pressure oxygen gas tank.

[0008] Further, the cold storage includes a -60°C cold storage, a -40°C cold storage, a -20°C cold storage, and a 0°C cold storage. The refrigerant pool includes a -60°C refrigerant pool, a -40°C refrigerant pool, a -20°C refrigerant pool, and a 0°C refrigerant pool. The cold storage and the refrigerant pool are arranged in one-to-one correspondence according to the ice-temperature refrigeration temperature, and the cold storage is arranged above the refrigerant pool. Each pair of the cold storage and the refrigerant pool jointly forms a cold energy recycling device.

[0009] The -60°C refrigerant pool is filled with refrigerant liquid with a freezing point of -60°C, the -40°C refrigerant pool is filled with refrigerant liquid with a freezing point of -40°C, the -20°C refrigerant pool is filled with refrigerant liquid with a freezing point of -20°C, and the 0°C refrigerant pool is filled with tap water.

[0010] Further, the -60°C cold storage, the -40°C cold storage, the -20°C cold storage, and the 0°C cold storage have the same structure and are all built by several vertical and horizontal support pipes, and a number of freezing chambers are evenly formed inside. The vertical pipes on both sides of the cold storage are liquid nitrogen pipes, and the horizontal pipes are hollow sleeve structures. The inner pipe is a liquid nitrogen circulation pipe, and the outer pipe is a refrigerant pipe. The space between the liquid nitrogen circulation pipe and the refrigerant pipe is filled with refrigerant liquid and sealed at both ends. Cold storage liquid nitrogen vaporizers are provided at both ends of the horizontal pipe. Both ends of the cold storage liquid nitrogen vaporizer are connected to the vertical liquid nitrogen pipes on both sides of the cold storage. One side of the vertical liquid nitrogen pipes on both sides of the cold storage is connected to the liquid nitrogen tank through a liquid nitrogen vacuum hose, and the other side is connected to the nitrogen gas booster pump.

[0011] Furthermore, the liquid nitrogen vaporizer and the liquid oxygen vaporizer include a liquid nitrogen / liquid oxygen channel pipe and a refrigerant module. The liquid nitrogen / liquid oxygen channel pipe is in an inverted U-shaped structure, and the refrigerant module is arranged in the middle of the bottom edge of the liquid nitrogen / liquid oxygen channel pipe.

[0012] Furthermore, a pressure reducing valve is arranged in the refrigerant module, and a vaporizer reinforcement device is arranged at the bent pipe of the liquid nitrogen / liquid oxygen channel pipe.

[0013] Furthermore, at least one cold energy recycling device is connected between the liquid nitrogen tank, the liquid oxygen tank, the nitrogen booster pump, and the oxygen booster pump.

[0014] Furthermore, when multiple cold energy recycling devices are connected, they are connected in sequence from the lowest to the highest ice-temperature cold storage temperature through the liquid nitrogen vacuum hose and the liquid oxygen vacuum hose at the head and tail.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model can not only recycle the cold energy generated by the air separation equipment for liquid nitrogen and liquid oxygen, but also directly connect to the green ammonia and nitrogen generation and the full closed-loop innovation industrial chain of the hydroxyl radical technology to realize the recycling and recovery of the cold energy of liquid nitrogen and liquid oxygen;

[0017] 2. During the process of recycling the cold energy of liquid nitrogen and liquid oxygen, the present utility model can realize the construction of an ultra-low temperature ice-temperature cold storage at -60°C, -40°C, a low-temperature ice-temperature cold storage at -20°C, and a high-temperature ice-temperature cold storage at 0°C;

[0018] 3. The operation cost of the present utility model can be saved by about 80%, and the equipment cost can be saved by 50%;

[0019] 4. The use of the present utility model can replace the Freon compression unit refrigeration, reduce the damage of Freon to the atmospheric ozone layer, and relieve the environmental pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 is a connection schematic diagram of Embodiment 2 of the present utility model;

[0022] Figure 3 is a connection schematic diagram of the -20°C cold storage and the 0°C cold storage of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the liquid nitrogen / liquid oxygen vaporizer of the present utility model;

[0024] Figure 5 is Figure 3 a partial enlarged schematic diagram of area A in

[0025] In the figure, 1 is an air separation device; 2 is a liquid nitrogen transport vehicle; 3 is a liquid nitrogen tank; 4 is a -60°C cold storage; 5 is a liquid oxygen transport vehicle; 6 is a liquid oxygen tank; 7 is a liquid argon transport vehicle; 8 is a -60°C refrigerant pool; 9 is a liquid nitrogen vaporizer; 10 is a liquid oxygen vaporizer; 11 is a liquid nitrogen vacuum hose; 12 is a liquid oxygen vacuum hose; 13 is a -40°C cold storage; 14 is a -40°C refrigerant pool; 15 is a nitrogen pressurizing pump; 16 is a high-pressure nitrogen tank; 17 is an oxygen pressurizing pump; 18 is a high-pressure oxygen tank; 19 is a liquid nitrogen / liquid oxygen channel pipe; 20 is a refrigerant module; 21 is a pressure reducing valve; 22 is a vaporizer reinforcement device; 23 is a -20°C cold storage; 24 is a 0°C cold storage; 25 is a -20°C refrigerant pool; 26 is a 0°C refrigerant pool; 27 is a liquid nitrogen flow pipe; 28 is a refrigerant pipe; 29 is a cold storage liquid nitrogen vaporizer. Specific embodiments

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Embodiment 1

[0027] As Figure 1-2 shown, a device for connecting the cold energy of liquid nitrogen and liquid oxygen LNG to green ammonia and hydroxyl radicals includes an air separation device 1, a liquid nitrogen cold energy recycling device, and a liquid oxygen cold energy recycling device. The air separation device 1 is arranged upstream of the liquid nitrogen cold energy recycling device and the liquid oxygen cold energy recycling device;

[0028] The liquid nitrogen cold energy recycling device includes a liquid nitrogen tank 3, a -60°C cold storage 4, a -60°C refrigerant pool 8, a liquid nitrogen vaporizer 9, a liquid nitrogen vacuum hose 11, a nitrogen pressurizing pump 15, and a high-pressure nitrogen tank 16. The outlet of the liquid nitrogen tank 3 is divided into two paths. One path is connected to the inlet of the -60°C cold storage 4 through the liquid nitrogen vacuum hose 11, and the other path is connected to the inlet of the -60°C refrigerant pool 8. The -60°C refrigerant pool 8 is filled with a refrigerant liquid with a freezing point of -60°C. The liquid nitrogen vaporizer 9 is arranged in the -60°C refrigerant pool 8. The liquid nitrogen vacuum hose 11 in the -60°C refrigerant pool 8 extends out of the -60°C refrigerant pool 8 after flowing through the liquid nitrogen vaporizer 9 and is connected to the inlet of the nitrogen pressurizing pump 15. The outlet of the cold storage is also connected to the inlet of the nitrogen pressurizing pump 15. The outlet of the nitrogen pressurizing pump 15 is connected to the high-pressure nitrogen tank 16 through a compression device;

[0029] The liquid oxygen cold energy recycling device includes a liquid oxygen tank 6, a liquid oxygen vaporizer 10, a liquid oxygen vacuum hose 12, an oxygen booster pump 17, and a high-pressure oxygen tank 18. The outlet of the liquid oxygen tank 6 is connected to the refrigerant pool inlet through the liquid oxygen vacuum hose 12. After flowing through the liquid oxygen vaporizer 10 in the refrigerant pool, the liquid oxygen vacuum hose 12 extends out of the refrigerant pool outlet and is connected to the oxygen booster pump 17. The oxygen booster pump 17 is connected to the high-pressure oxygen tank 18 through a compression device. An ozone generation device and a deep ultraviolet UVC LED 280nm chip are integrated in the high-pressure oxygen tank 18, and ozone is irradiated to generate hydroxyl radicals.

[0030] The -60°C cold storage 4, -40°C cold storage 13, -20°C cold storage 23, and 0°C cold storage 24 have the same structure, which is built by a number of vertical and horizontal support pipes, and a number of freezer compartments are evenly formed inside. The vertical pipes on both sides of the cold storage are liquid nitrogen pipes, and the horizontal pipes are of a hollow sleeve structure. The inner pipe is a liquid nitrogen circulation pipe 27, and the outer pipe is a refrigerant pipe 28. The space between the liquid nitrogen circulation pipe 27 and the refrigerant pipe 28 is filled with refrigerant liquid and both ends are sealed. Cold storage liquid nitrogen vaporizers 29 are provided at both ends of the horizontal pipe. Both ends of the cold storage liquid nitrogen vaporizer 29 are connected to the vertical liquid nitrogen pipes on both sides of the cold storage. One side of the vertical liquid nitrogen pipes on both sides of the cold storage is connected to the liquid nitrogen tank 3 through a liquid nitrogen vacuum hose 11, and the other side is connected to the nitrogen booster pump 15.

[0031] The liquid nitrogen vaporizer 9 and the liquid oxygen vaporizer 10 include a liquid nitrogen / liquid oxygen channel pipe 19 and a refrigerant module 20. The liquid nitrogen / liquid oxygen channel pipe 19 has an inverted U-shaped structure, and a vaporizer reinforcement device 22 is provided at the bent pipe to reinforce the bearing capacity of the fully enclosed refrigerant pipeline of the liquid nitrogen vaporizer for the second large functional shelf. The refrigerant module 20 is arranged in the middle of the bottom of the liquid nitrogen / liquid oxygen channel pipe 19, and a pressure reducing valve 21 is provided in the refrigerant module 20 to adjust the pressure generated by the freezing expansion of the vaporizer. Example 2

[0032] The difference between this example and Example 1 is that the downstream of the liquid nitrogen tank 3 and the liquid oxygen tank 6 is connected to the -40°C cold storage 13 and the -40°C refrigerant pool 14, and the -40°C refrigerant pool 14 is filled with refrigerant liquid with a freezing point of -40°C. Other structures are the same as those in Example 1.

[0033] The downstream of the liquid nitrogen tank 3 and the liquid oxygen tank 6 can also be connected to the -20°C cold storage 23 and the -20°C refrigerant pool 25 or the -20°C refrigerant pool 25 and the 0°C refrigerant pool 26. The -20°C refrigerant pool 25 is filled with refrigerant liquid with a freezing point of -20°C, and the 0°C refrigerant pool 26 is filled with tap water, and the freezing point of tap water is zero. Example 3

[0034] The difference between this embodiment and Embodiment 1 is that the outlets of the -60°C cold storage 4 and the -60°C refrigerant pool 8 are also connected to the -40°C cold storage 13 and the -40°C cold storage 13. The -40°C refrigerant pool 14 is filled with refrigerant liquid with a freezing point of -40°C, and the other structures are the same. Embodiment 4

[0035] The difference between this embodiment and Embodiment 3 is that the outlets of the -40°C cold storage 13 and the -40°C cold storage 13 are also connected to the -20°C cold storage 23, the 0°C cold storage 24, the -20°C refrigerant pool 25, and the 0°C refrigerant pool 26. The -20°C refrigerant pool 25 is filled with refrigerant liquid with a freezing point of -20°C, and the 0°C refrigerant pool 26 is filled with tap water, the freezing point of tap water being zero degrees, and the other structures are the same.

[0036] The working process of the present utility model:

[0037] The -196°C liquid nitrogen produced by the air separation equipment 1 is transported to the liquid nitrogen tank 3 by the liquid nitrogen transport vehicle 2, and the -183°C liquid oxygen produced is transported to the liquid oxygen tank 6 by the liquid oxygen transport vehicle 5. The produced liquid argon is directly put on the market for sale.

[0038] A part of the -196°C liquid nitrogen in the liquid nitrogen tank 3 enters a number of cold storage liquid nitrogen vaporizers 29 up and down in the cold storage through the vertical liquid nitrogen pipe in the cold storage. After vaporization, the liquid nitrogen flows downstream through the liquid nitrogen circulation pipe 27. The cold energy generated by vaporization freezes the refrigerant liquid in the refrigerant pipe 28. The unfrozen refrigerant is -60°C and radiates to the surrounding corners of the refrigerant pipe 28 in the -60°C cold storage 4. The cold energy generated by the vaporization of a number of refrigerant pipes 28 in the vertical direction in the cold storage radiates to all parts of the cold storage, achieving the -60°C ultra-low temperature technical index of each part in the ultra-low temperature -60°C cold storage 4.

[0039] Another part of the -196°C liquid nitrogen in the liquid nitrogen tank 3 enters the -60°C refrigerant pool 8, enters the liquid nitrogen / liquid oxygen channel pipe 19 through the liquid nitrogen vacuum hose 11. The liquid nitrogen flows through the fully enclosed refrigerant module 20 of the liquid nitrogen vaporizer 9, which is filled with refrigerant liquid with a freezing point of -60°C. The cold energy generated by vaporization freezes the surrounding refrigerant liquid. The unfrozen refrigerant is -60°C and radiates to all corners in the -60°C cold storage 4, combining with the cold energy released by the -60°C freezing point refrigerant liquid in the -60°C refrigerant pool 8, achieving the -60°C ultra-low temperature technical index of the ultra-low temperature -60°C cold storage 4.

[0040] The ultra-low temperature -40°C cold storage 13 adopts the same technical route as the -60°C cold storage 4. Just by changing the -60°C freezing point refrigerant liquid to -40°C freezing point refrigerant liquid, all the technical indexes of the -40°C cold storage 13 can be fully achieved.

[0041] The -20°C cold storage 23 and the 0°C cold storage 24 can be achieved by adopting the same above-mentioned technical route.

[0042] The liquid nitrogen after passing through the cold energy recycling device is processed by the nitrogen gas booster pump 15 and compression equipment, then enters the high-pressure nitrogen gas tank 16 for storage, and is then transported to the green ammonia production base, where it synthesizes with green hydrogen to produce green ammonia or forms a full closed-loop innovation industrial chain with nitrogen-using industries such as nitrogen filling for grain preservation in the food industry.

[0043] The liquid oxygen at -183°C in the liquid oxygen tank 6 enters the -60°C refrigerant pool 8, passes through the liquid oxygen vacuum hose 13 into the liquid nitrogen / liquid oxygen channel pipe 19, and the liquid oxygen flows through the fully enclosed refrigerant module 20 of the liquid oxygen vaporizer 10, which contains refrigerant liquid with a freezing point of -60°C. The cold energy generated by vaporization freezes the surrounding refrigerant liquid, and the unfrozen refrigerant is -60°C, which radiates to all corners of the -60°C cold storage 4. Combined with the cold energy released by the refrigerant liquid with a freezing point of -60°C in the -60°C refrigerant pool 8, the -60°C ultra-low temperature technical index of the ultra-low temperature -60°C cold storage 4 is achieved.

[0044] The principle of the -40°C cold storage 13, -20°C cold storage 23 and 0°C cold storage 24 is the same as above.

[0045] The liquid oxygen after passing through the cold energy recycling device is processed by the oxygen booster pump 17 and compression equipment, then enters the high-pressure oxygen tank 18 for storage. Ozone is generated from the pure oxygen in the high-pressure oxygen tank 18 using an ozone generation device, and then hydroxyl radicals are generated by irradiating the ozone with a deep ultraviolet UVC LED 280nm chip, which are respectively used for decomposing pesticide residues on fruits and vegetables, disinfecting and detoxifying drinking water, disinfecting and detoxifying air, solving soil pollution, upgrading the water quality of sewage to reach the standard of class IV surface water for reuse, decomposing toxic organic substances such as dioxins in waste incineration to generate non-toxic inorganic salts, etc., so that the toxic organic substances reach the non-detectable standard. Realizing the operation of the full closed-loop innovation industrial chain is both scientific and feasible, and generates huge economic benefits.

Claims

1. An apparatus for connecting the cold energy of liquid nitrogen, liquid oxygen, and LNG to green ammonia and hydroxyl radicals, characterized in that, It includes an air separation unit (1), a liquid nitrogen cold energy recycling device, and a liquid oxygen cold energy recycling device. The air separation unit (1) is arranged upstream of the liquid nitrogen cold energy recycling device and the liquid oxygen cold energy recycling device; The liquid nitrogen cold energy recycling device includes a liquid nitrogen tank (3), a cold storage, a refrigerant pool, a liquid nitrogen vaporizer (9), a liquid nitrogen vacuum hose (11), a nitrogen gas booster pump (15), and a high-pressure nitrogen gas tank (16). The outlet of the liquid nitrogen tank (3) is divided into two paths through the liquid nitrogen vacuum hose (11). One path is connected to the cold storage inlet, and the other path is connected to the refrigerant pool inlet. The refrigerant pool is filled with refrigerant liquid. The liquid nitrogen vaporizer (9) is arranged in the refrigerant pool. The liquid nitrogen vacuum hose (11) in the refrigerant pool passes through the liquid nitrogen vaporizer (9) and then extends out from the refrigerant pool outlet to be connected to the inlet of the nitrogen gas booster pump (15). The cold storage outlet is also connected to the inlet of the nitrogen gas booster pump (15). The outlet of the nitrogen gas booster pump (15) is connected to the high-pressure nitrogen gas tank (16) through a compression device; The liquid oxygen cold energy recycling device includes a liquid oxygen tank (6), a liquid oxygen vaporizer (10), a liquid oxygen vacuum hose (12), an oxygen booster pump (17), and a high-pressure oxygen tank (18). The outlet of the liquid oxygen tank (6) is connected to the refrigerant pool inlet through the liquid oxygen vacuum hose (12). After the liquid oxygen vacuum hose (12) passes through the liquid oxygen vaporizer (10) in the refrigerant pool, it extends out from the refrigerant pool outlet and is connected to the oxygen booster pump (17). The oxygen booster pump (17) is connected to the high-pressure oxygen tank (18) through a compression device. The high-pressure oxygen tank (18) integrates an ozone generation device and a deep ultraviolet UVC LED 280nm chip to irradiate ozone to generate hydroxyl radicals.

2. The device for connecting the cold energy of liquid nitrogen, liquid oxygen, and LNG to green ammonia and hydroxyl radicals according to claim 1, wherein The cold storage includes a -60°C cold storage (4), a -40°C cold storage (13), a -20°C cold storage (23), and a 0°C cold storage (24). The refrigerant pool includes a -60°C refrigerant pool (8), a -40°C refrigerant pool (14), a -20°C refrigerant pool (25), and a 0°C refrigerant pool (26). The cold storage and the refrigerant pool are arranged in one-to-one correspondence according to the ice-temperature refrigeration temperature, and the cold storage is arranged above the refrigerant pool. Each pair of the cold storage and the refrigerant pool jointly forms a cold energy recycling device; The -60°C refrigerant pool (8) is filled with refrigerant liquid with a freezing point of -60°C, the -40°C refrigerant pool (14) is filled with refrigerant liquid with a freezing point of -40°C, the -20°C refrigerant pool (25) is filled with refrigerant liquid with a freezing point of -20°C, and the 0°C refrigerant pool (26) is filled with tap water.

3. The device for connecting the cold energy of liquid nitrogen, liquid oxygen, and LNG to green ammonia and hydroxyl radicals according to claim 2, wherein, The structures of the -60°C cold storage (4), -40°C cold storage (13), -20°C cold storage (23) and 0°C cold storage (24) are the same. They are all built by a number of vertical and horizontal support pipes, and a number of freezer compartments are evenly formed inside. The vertical pipes on both sides of the cold storage are liquid nitrogen pipes, and the horizontal pipes are of a hollow sleeve structure. The inner pipe is a liquid nitrogen circulation pipe (27), and the outer pipe is a refrigerant pipe (28). The space between the liquid nitrogen circulation pipe (27) and the refrigerant pipe (28) is filled with refrigerant liquid and both ends are sealed. Cold storage liquid nitrogen vaporizers (29) are provided at both ends of the horizontal pipe. Both ends of the cold storage liquid nitrogen vaporizer (29) are connected to the vertical liquid nitrogen pipes on both sides of the cold storage. One side of the vertical liquid nitrogen pipes on both sides of the cold storage is connected to the liquid nitrogen tank (3) through a liquid nitrogen vacuum hose (11), and the other side is connected to a nitrogen pressure pump (15).

4. The device for connecting the cold energy of liquid nitrogen, liquid oxygen, and LNG to green ammonia and hydroxyl radicals according to claim 1, characterized in that, The liquid nitrogen vaporizer (9) and the liquid oxygen vaporizer (10) include a liquid nitrogen / liquid oxygen channel pipe (19) and a refrigerant module (20). The liquid nitrogen / liquid oxygen channel pipe (19) is of an inverted U-shaped structure, and the refrigerant module (20) is arranged in the middle of the bottom edge of the liquid nitrogen / liquid oxygen channel pipe (19).

5. The device for connecting the cold energy of liquid nitrogen, liquid oxygen, and LNG to green ammonia and hydroxyl radicals according to claim 4, wherein, A pressure reducing valve (21) is provided inside the refrigerant module (20), and a vaporizer reinforcement device (22) is provided at the bent pipe of the liquid nitrogen / liquid oxygen channel pipe (19).

6. The device for connecting the cold energy of liquid nitrogen, liquid oxygen and LNG to green ammonia and hydroxyl radicals according to claim 5, wherein, At least one cold energy recycling device is connected between the liquid nitrogen tank (3), the liquid oxygen tank (6) and the nitrogen pressure pump (15), the oxygen pressure pump (17).

7. An apparatus for connecting the cold energy of liquid nitrogen, liquid oxygen, and LNG to green ammonia and hydroxyl radicals according to claim 6, characterized in that, When connecting multiple cold energy recycling devices, they are connected in sequence from head to tail through a liquid nitrogen vacuum hose (11) and a liquid oxygen vacuum hose (12) in the order of increasing ice-temperature refrigeration temperature from low to high.

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