Low-temperature liquid vaporization device

Abstract

The utility model provides a low-temperature liquid vaporization device. The low-temperature liquid vaporization device comprises a low-temperature liquid storage tank, an air temperature vaporizer, a water bath vaporizer, a pressure reducing valve group and user equipment which are sequentially connected in series, the low-temperature liquid storage tank is connected with the air temperature vaporizer through the high-pressure liquid pump; the air temperature vaporizer is connected with the water bath vaporizer through a first valve; the air temperature vaporizer is further connected with the pressure reducing valve set through a second valve. The water bath vaporizer is connected with process equipment through a circulating pump to form a loop; the water bath vaporizer is also connected with the pressure reducing valve group through the outlet valve. According to the device, through cooperative use of the equipment, when the environment temperature is low, low-temperature liquid can be fully vaporized through joint work of the air temperature vaporizer and the water bath vaporizer, and the defects that when the low-temperature liquid is vaporized in the prior art, an air temperature vaporizer is adopted, and when the environment temperature is low, the vaporizer is frosted, and the vaporizer cannot be used for vaporizing the low-temperature liquid are overcome. Therefore, the low-temperature liquid cannot be completely vaporized, and the use is influenced.

Description

Technical Field

[0001] The present application relates to the technical field of cryogenic liquid vaporization, and in particular to a cryogenic liquid vaporization device. Background Art

[0002] The cryogenic separation industry uses scientific technology to separate gases from the atmosphere in liquid form, and transports them to the customer's storage area via cryogenic tank trucks. The customer then vaporizes the liquid into gas and provides it to industrial and mining enterprises and various manufacturing industries. In order to save vaporization costs, companies generally use air-temperature vaporizers to vaporize low-temperature liquids. The air-temperature vaporizer is a finned tube vaporizer that uses the natural convection air in the atmospheric environment as a heat source, and exchanges heat with the cryogenic liquid through star-shaped aluminum fin tubes with good thermal conductivity, vaporizing it into a gas at a certain temperature. The air-temperature vaporizer does not require additional power and energy consumption to work, and has the advantages of being pollution-free, green and environmentally friendly, safe and simple, easy to maintain, low operating cost, and unrestricted use.

[0003] When used by users, the temperature of the vaporized gas provided by the air-temperature vaporizer is required to be above 0°C, generally 5°C. However, in the northern part of my country, the temperature is relatively low in winter, the daytime temperature is generally below 0°C, and the nighttime temperature may be as low as -13.5°C. Frosting will occur when using the air-temperature vaporizer, resulting in a decrease in the heat transfer efficiency of the air-temperature vaporizer, which will cause the cryogenic liquid to not be completely vaporized, affecting its use. Utility Model Content

[0004] The present application provides a cryogenic liquid vaporization device to solve the problem that when using an air-temperature vaporizer to vaporize cryogenic liquid, the vaporizer frosts when the ambient temperature is low, thereby causing the cryogenic liquid to be unable to be completely vaporized, affecting the use.

[0005] The present application provides a cryogenic liquid vaporization device, comprising a cryogenic liquid storage tank, an air temperature vaporizer, a water bath vaporizer, a pressure reducing valve group and user equipment connected in series in sequence;

[0006] The cryogenic liquid storage tank is connected to the air-temperature vaporizer via a high-pressure liquid pump;

[0007] The air temperature vaporizer is connected to the water bath vaporizer through a first valve;

[0008] The air temperature vaporizer is also connected to the pressure reducing valve group through a second valve;

[0009] The water bath vaporizer is connected to the process equipment through a circulation pump to form a loop;

[0010] The water bath vaporizer is also connected to the pressure reducing valve group through an outlet valve.

[0011] Optionally, the top and one side of the air temperature vaporizer are provided with air inlet bins, both of which are connected to the compressor;

[0012] An air outlet bin is arranged at the bottom of the air temperature evaporator, and the remaining side surfaces of the air temperature evaporator are closed by a cover plate.

[0013] Optionally, a mixing tank is provided on the pipeline connecting the water bath vaporizer and the circulation pump;

[0014] An exhaust port is provided on the top of the mixing tank;

[0015] The mixing tank is connected with the air outlet bin through an inverted U-shaped pipeline.

[0016] Optionally, an air filter is also provided on the pipeline connecting the mixing tank and the air outlet bin.

[0017] Optionally, the water bath vaporizer comprises a housing;

[0018] A water bath tube is provided in the box, one end of the water bath tube is connected to the first valve through a pipeline, and the other end of the water bath tube is connected to the outlet valve through a pipeline;

[0019] The box body is provided with a circulating water outlet and a circulating water inlet, the circulating water outlet is connected to the circulating pump, and the circulating water inlet is connected to the process equipment;

[0020] An electric heating wire is arranged in the box.

[0021] Optionally, the electric heating wire is spirally coiled around the outer circumference of the water bath tube.

[0022] Optionally, the first valve, the second valve, the outlet valve and the circulation pump are all electrically connected to the controller;

[0023] The controller is also electrically connected to the air temperature sensor.

[0024] The present application provides an air temperature liquid vaporization device, which separates an air temperature vaporizer and a water bath vaporizer into two working states: working together and working alone by setting a first valve and a second valve, and can flexibly switch between the above two working states when the ambient temperature changes, while ensuring the vaporization efficiency of the cryogenic liquid, and when the ambient temperature is low, the cryogenic liquid can be fully vaporized by using the joint work of the air temperature vaporizer and the water bath vaporizer, thereby overcoming the disadvantage that the existing air temperature vaporizer used to vaporize the cryogenic liquid will cause the vaporizer to frost when the ambient temperature is low, thereby causing the cryogenic liquid to be unable to be completely vaporized, affecting its use. In addition, the water bath vaporizer is connected to the process equipment through a circulating pump to form a loop, and the waste heat generated when the process equipment is working can also be utilized, which has the beneficial effect of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of a cryogenic liquid vaporization device provided in one embodiment of the present application;

[0027] Figure 2 A schematic diagram of a cryogenic liquid vaporization device provided in another embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of an air temperature vaporizer provided in one embodiment of the present application;

[0029] Figure 4 A schematic diagram of a cryogenic liquid vaporization device provided in yet another embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of a water bath vaporizer provided in one embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of a water bath tube provided in one embodiment of the present application;

[0032] Figure 7 A schematic diagram of a low-temperature liquid vaporization device provided in yet another embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Low-temperature liquid storage tank; 2. Air temperature vaporizer; 3. Water bath vaporizer; 4. Pressure reducing valve group; 5. User equipment; 6. Process equipment; 7. Controller; 8. Mixing tank; 11. High-pressure liquid pump; 21. Air inlet bin; 22. Compressor; 23. Air outlet bin; 30. Circulating pump; 31. Box; 32. Water bath tube; 33. Electric heating wire; 71. Air temperature sensor; 81. Air filter; 100. First valve; 200. Second valve; 300. Outlet valve; 301. Circulating water outlet; 302. Circulating water inlet; 801. Exhaust port. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0036] like Figure 1 As shown, the present application provides a cryogenic liquid vaporization device, comprising a cryogenic liquid storage tank 1, an air temperature vaporizer 2, a water bath vaporizer 3, a pressure reducing valve group 4 and a user device 5 connected in series in sequence;

[0037] The cryogenic liquid storage tank 1 is connected to the air temperature vaporizer 2 via a high pressure liquid pump 11;

[0038] The air temperature vaporizer 2 is connected to the water bath vaporizer 3 via a first valve 100;

[0039] The air temperature vaporizer 2 is also connected to the pressure reducing valve group 4 via the second valve 200;

[0040] The water bath vaporizer 3 is connected to the process equipment 6 through a circulation pump 30 to form a loop;

[0041] The water bath vaporizer 3 is also connected to the pressure reducing valve group 4 via the outlet valve 300 .

[0042] In the present application, the pressure reducing valve group 4 is composed of a plurality of pressure reducing valves connected in parallel, each of which can reduce the pressure of the vaporized gaseous substance into gas of different pressures, thereby meeting the needs of multiple users. The user device 5 is also a gas-using device. During use, a corresponding compressor can be arranged between the pressure reducing valve group 4 and the user device 5 to supply the gas to the user device 5 after pressurizing the gas.

[0043] The process equipment 6 is the equipment in the factory that needs to perform heat exchange cooling.

[0044] During use, when the monitored external temperature is higher than a preset temperature (5° C. in this application), the second valve 200 is opened, and the first valve 100 , the outlet valve 300 and the circulation pump 30 are closed.

[0045] Then, the high-pressure liquid pump 11 is turned on. The low-temperature liquid stored in the low-temperature liquid storage tank 1 is transferred by the high-pressure liquid pump 11 into the vaporization tube in the air-temperature vaporizer 2, and heat is exchanged with the low-temperature liquid outside the tube. After the temperature is increased, the low-temperature liquid is vaporized into a gaseous state, and is discharged from the air-temperature vaporizer 2. It enters the pressure reducing valve group 4 through the second valve 200, and is reduced in pressure into gases of different pressures through different pressure reducing valves connected in parallel in the pressure reducing valve group 4, and is respectively transported to the corresponding user equipment 5 for use.

[0046] When the monitored external temperature is lower than the preset temperature (5° C. in this application), the first valve 100 , the outlet valve 300 and the circulation pump 30 are opened, and the second valve 200 is closed.

[0047] The cryogenic liquid stored in the cryogenic liquid storage tank 1 is transferred by the high-pressure liquid pump 11 into the vaporization tube in the air-temperature vaporizer 2, and exchanges heat with the cryogenic liquid outside the tube. Due to the low ambient temperature, some of the cryogenic liquid is not completely vaporized. These gases mixed with the cryogenic liquid are discharged from the air-temperature vaporizer 2 and enter the water bath vaporizer 3 to exchange heat with the circulating water in the water bath vaporizer 3. In this process, the cryogenic liquid that is not completely vaporized by the air-temperature vaporizer 2 is fully vaporized into a gaseous state through heat exchange in the water bath vaporizer 3, and then discharged from the water bath vaporizer 3 into the pressure reducing valve group 4, and is reduced in pressure into gases of different pressures through different pressure reducing valves connected in parallel in the pressure reducing valve group 4, and is respectively transported to the corresponding user equipment 5 for use.

[0048] The circulating water after heat exchange with the low-temperature liquid in the water bath evaporator 3 has its temperature reduced and is then circulated to the process equipment 6 by the circulation pump 30 for use as cooling water. After completing the heat exchange with the process equipment 6, the circulating water can be returned to the water bath evaporator 3 for recycling.

[0049] The present application provides a temperature liquid vaporization device, which separates the air temperature vaporizer 2 and the water bath vaporizer 3 into two working states: working together and the air temperature vaporizer 2 working alone by setting a first valve 100 and a second valve 200, and can flexibly switch between the above two working states when the ambient temperature changes, while ensuring the vaporization efficiency of the low-temperature liquid, and when the ambient temperature is low, the low-temperature liquid can be fully vaporized by using the joint work of the air temperature vaporizer 2 and the water bath vaporizer 3, thereby overcoming the disadvantage that the existing air temperature vaporizer is used to vaporize the low-temperature liquid, and the vaporizer is frosted when the ambient temperature is low, thereby causing the low-temperature liquid to be unable to be completely vaporized, affecting the use. In addition, the water bath vaporizer 3 is connected to the process equipment 6 through the circulation pump 30 to form a loop, and the waste heat generated when the process equipment 6 is working can also be utilized, which has the beneficial effect of saving energy.

[0050] like Figure 2 and Figure 3 As shown, optionally, the top and one side of the air temperature vaporizer 2 are provided with an air inlet bin 21 and are both connected to the compressor 22;

[0051] An air outlet chamber 23 is provided at the bottom of the air temperature evaporator 2, and the remaining side surfaces of the air temperature evaporator 2 are closed by a cover plate.

[0052] In the present application, an air outlet bin 23 is provided at the bottom of the air temperature evaporator 2, and the remaining sides of the air temperature evaporator 2 are closed by a cover plate. This arrangement can ensure that the air blown out from the compressor 22 can fully contact and exchange heat with the evaporation tube in the air temperature evaporator 2.

[0053] In the present application, the compressor 22 is provided to not only increase the air flow rate by compression, thereby strengthening the heat exchange between the air and the vaporization tube in the air temperature vaporizer 2, but also improve the heat exchange efficiency because the temperature of the air will rise after being compressed.

[0054] In the present application, when in use, the cryogenic liquid stored in the cryogenic liquid storage tank 1 is transferred into the air temperature vaporizer 2 by the high pressure liquid pump 11. At the same time, the compressor 22 is turned on to compress the external air and then pass it into the space between the vaporizer tubes in the air temperature vaporizer 2 from the air inlet bins 21 at the top and sides of the air temperature vaporizer 2. Since the temperature of the air increases after being compressed by the compressor 22, and its pressure increases, that is, its flow rate increases. When the compressed air enters the air temperature vaporizer 2, it exchanges heat with the cryogenic liquid in the vaporizer tube of the air temperature vaporizer 2. Since the air flow rate increases and the temperature of the compressed air increases, the heat exchange between the air and the vaporizer tube is enhanced, and the air after enhanced convection heat exchange is discharged from the air outlet bin 23.

[0055] like Figure 4 As shown, optionally, a mixing tank 8 is provided on the pipeline connecting the water bath vaporizer 3 and the circulation pump 30;

[0056] An exhaust port 801 is provided at the top of the mixing tank 8;

[0057] The mixing tank 8 is connected to the air outlet bin 23 via an inverted U-shaped pipeline.

[0058] The mixing tank 8 is provided to allow the cold air discharged from the air temperature evaporator 2 to contact and exchange heat with the circulating water output from the water bath evaporator 3, so that the temperature of the circulating water is further reduced. This arrangement can fully utilize the coldness in the cold air and has the beneficial effect of saving energy.

[0059] In the present application, an exhaust port 801 is provided at the top of the mixing tank 8, so that the cold air (from the air temperature evaporator 2) entering the mixing tank 8 can be discharged in time after heat exchange with the circulating water in the tank.

[0060] The mixing tank 8 is connected to the air outlet bin 23 via an inverted U-shaped pipe, and this arrangement can prevent the circulating water in the mixing tank 8 from flowing back.

[0061] like Figure 4 As shown, optionally, an air filter 81 is also provided on the pipeline connecting the mixing tank 8 and the air outlet bin 23 .

[0062] In the present application, an air filter 81 is provided to filter the air output by the air temperature vaporizer 2, so that the air entering the mixing tank 8 is clean, thereby avoiding the adverse consequence of the water quality deteriorating due to the contamination of the circulating water by impurities such as dust mixed in the air.

[0063] like Figure 5As shown, optionally, the water bath vaporizer 3 includes a box body 31;

[0064] A water bath tube 32 is provided in the box body 31, one end of the water bath tube 32 is connected to the first valve 100 through a pipeline, and the other end is connected to the outlet valve 300 through a pipeline;

[0065] The box body 31 is provided with a circulating water outlet 301 and a circulating water inlet 302, the circulating water outlet 301 is connected to the circulating pump 30, and the circulating water inlet 302 is connected to the process equipment 6;

[0066] An electric heating wire 33 is arranged in the box body 31 .

[0067] In the present application, when in use, the cryogenic liquid that has not been fully vaporized (as well as the gaseous substance after the cryogenic liquid is vaporized) is discharged from the air-temperature vaporizer 2, enters the water bath tube 32 of the water bath vaporizer 3, and exchanges heat with the circulating water in the water bath vaporizer 3. During this process, the cryogenic liquid that has not been completely vaporized by the air-temperature vaporizer 2 is fully vaporized into a gaseous state by heat exchange in the water bath vaporizer 3, and then discharged from the water bath vaporizer 3.

[0068] After the circulating water in the water bath evaporator 3 exchanges heat with the low-temperature liquid, the temperature of the circulating water decreases, and then it is pumped out from the circulating water outlet 301 by the circulating pump 30 and circulated to the process equipment 6 for use as cooling water. After the circulating water completes the heat exchange with the process equipment 6, it can be returned to the water bath evaporator 3 through the circulating water inlet 302 for recycling.

[0069] When the temperature of the water circulated back from the process equipment 6 is not enough to fully vaporize the low-temperature liquid entering the water bath evaporator 3, the electric heating wire 33 can be energized to heat the water bath tube 32 and the circulating water in the water bath evaporator 3, thereby vaporizing the low-temperature liquid in the water bath tube 32 through heat exchange.

[0070] like Figure 6 As shown, optionally, the electric heating wire 33 is spirally coiled around the outer circumference of the water bath tube 32 .

[0071] In the present application, the electric heating wire 33 is spirally coiled around the outer circumference of the water bath tube 32, and can directly heat the water bath tube 32, thereby reducing heat loss; at the same time, the water bath tube 32 is immersed in circulating water, and the electric heating wire 33 heats the circulating water while heating the water bath tube 32, and because the specific heat capacity of water is large, the heat generated by the electric heating wire 33 (here refers to the heat for heating the circulating water) can be temporarily stored in the circulating water. When the electric heating wire 33 stops energizing and generating heat, it can still exchange heat with the water bath tube through the heated circulating water, so that the electric heating wire 33 can be intermittently heated, thereby saving electricity. In a feasible manner, the electric heating wire 33 can be woven into a mesh and set on the outer circumference of the water bath tube 32.

[0072] like Figure 7 As shown, optionally, the first valve 100, the second valve 200, the outlet valve 300 and the circulation pump 30 are all electrically connected to the controller 7;

[0073] The controller 7 is also electrically connected to the temperature sensor 71 .

[0074] In the present application, the controller 7 is configured to control the opening and closing of the first valve 100 , the second valve 200 , the outlet valve 300 and the circulation pump 30 through the temperature data fed back by the temperature sensor 71 .

[0075] The present application provides a cryogenic liquid vaporizer, the working process of which is as follows:

[0076] When in use, the air temperature sensor 71 measures the ambient temperature and transmits the ambient temperature data to the controller 7 in real time. When the external temperature monitored by the air temperature sensor 71 is higher than the preset temperature (5°C in this application), the controller 7 controls the second valve 200 to open, while the first valve 100, the outlet valve 300 and the circulation pump 30 are closed. At this time, the air outlet bin 23 may not be connected to the mixing tank 8.

[0077] The cryogenic liquid stored in the cryogenic liquid storage tank 1 is transferred into the air temperature vaporizer 2 by the high pressure liquid pump 11. At the same time, the compressor 22 is turned on to compress the external air and then pass it into the space between the vaporizer tubes in the air temperature vaporizer 2 from the air inlet bin 21 on the top and side of the air temperature vaporizer 2. Since the temperature of the air increases after being compressed by the compressor 22, and its pressure increases, that is, its flow rate increases. When the compressed air enters the air temperature vaporizer 2, it exchanges heat with the cryogenic liquid in the vaporizer tube of the air temperature vaporizer 2. Since the air flow rate increases and the temperature of the compressed air increases, the heat exchange between the air and the vaporizer tube is enhanced. The air after enhanced convection heat exchange is discharged from the air outlet bin 23. The cryogenic liquid is vaporized into a gaseous state after heat exchange and temperature rise in the vaporizer tube, discharged from the air temperature vaporizer 2, and enters the pressure reducing valve group 4 through the second valve 200. It is reduced into gases of different pressures through different pressure reducing valves connected in parallel in the pressure reducing valve group 4, and is respectively transported to the corresponding user equipment 5 for use.

[0078] When the outside temperature monitored by the temperature sensor 71 is lower than the preset temperature (5°C in this application), the controller 7 controls the first valve 100, the outlet valve 300 and the circulation pump 30 to open, and the second valve 200 to close. At this time, the air outlet chamber 23 is connected to the mixing tank 8.

[0079] The cryogenic liquid stored in the cryogenic liquid storage tank 1 is transferred into the air temperature vaporizer 2 by the high pressure liquid pump 11. At the same time, the compressor 22 is turned on to compress the external air and then pass it into the space between the vaporizer tubes in the air temperature vaporizer 2 from the air inlet bins 21 at the top and sides of the air temperature vaporizer 2. Since the temperature of the air increases after being compressed by the compressor 22, and its pressure increases, that is, its flow rate increases. When the compressed air enters the air temperature vaporizer 2, it exchanges heat with the cryogenic liquid in the vaporizer tube of the air temperature vaporizer 2. Since the air flow rate increases and the temperature of the compressed air increases, the heat exchange between the air and the vaporizer tube is enhanced, and the air after enhanced convection heat exchange is discharged from the air outlet bin 23. The exhausted cold air is filtered through the air filter 81 and then enters the mixing tank 8, where it is in contact with the circulating water output from the circulating water outlet 301 of the water bath evaporator 3 for heat exchange, so that the temperature of the circulating water is further reduced, and then it is supplied to the process equipment 6 through the circulating pump 30 for heat exchange cooling. After the heat exchange with the process equipment 6, the temperature of the circulating water increases, and then it enters the water bath evaporator 3 through the circulating water inlet 302 for recycling.

[0080] The low-temperature liquid is vaporized into a gas after heat exchange and temperature rise in the vaporization tube, and is discharged from the air-temperature vaporizer 2 and enters the water bath tube 32 of the water bath vaporizer 3 to exchange heat with the circulating water in the water bath vaporizer 3. In this process, the low-temperature liquid that is not completely vaporized by the air-temperature vaporizer 2 is fully vaporized into a gas by heat exchange in the water bath vaporizer 3, and is then discharged from the water bath vaporizer 3 and enters the pressure reducing valve group 4. It is reduced in pressure into gases of different pressures by different pressure reducing valves connected in parallel in the pressure reducing valve group 4 and is respectively transported to the corresponding user equipment 5 for use.

[0081] When the temperature of the water circulated back from the process equipment 6 is not enough to fully vaporize the low-temperature liquid entering the water bath evaporator 3, the electric heating wire 33 can be energized to heat the water bath tube 32 and the circulating water in the water bath evaporator 3, thereby vaporizing the low-temperature liquid in the water bath tube 32 through heat exchange.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cryogenic liquid vaporization device, characterized in that: It comprises a cryogenic liquid storage tank (1), an air temperature vaporizer (2), a water bath vaporizer (3), a pressure reducing valve group (4) and user equipment (5) which are connected in series in sequence; The cryogenic liquid storage tank (1) is connected to the air-temperature vaporizer (2) via a high-pressure liquid pump (11); The air temperature vaporizer (2) is connected to the water bath vaporizer (3) via a first valve (100); The air temperature vaporizer (2) is also connected to the pressure reducing valve group (4) via a second valve (200); The water bath vaporizer (3) is connected to the process equipment (6) via a circulation pump (30) to form a loop; The water bath vaporizer (3) is also connected to the pressure reducing valve group (4) via an outlet valve (300).

2. The cryogenic liquid vaporization device according to claim 1, characterized in that: The top and one side of the air temperature vaporizer (2) are provided with an air inlet bin (21) and are both connected to a compressor (22); An air outlet bin (23) is provided at the bottom of the air-temperature evaporator (2), and the remaining side surfaces of the air-temperature evaporator (2) are closed by a cover plate.

3. The cryogenic liquid vaporization device according to claim 2, characterized in that: A mixing tank (8) is provided on the pipeline connecting the water bath vaporizer (3) and the circulation pump (30); The top of the mixing tank (8) is provided with an exhaust port (801); The mixing tank (8) is connected to the air outlet bin (23) via an inverted U-shaped pipeline.

4. The cryogenic liquid vaporization device according to claim 3, characterized in that: An air filter (81) is also provided on the pipeline connecting the mixing tank (8) and the air outlet bin (23).

5. The cryogenic liquid vaporization device according to claim 1, characterized in that: The water bath vaporizer (3) comprises a housing (31); A water bath tube (32) is arranged in the box (31), one end of the water bath tube (32) is connected to the first valve (100) through a pipeline, and the other end of the water bath tube (32) is connected to the outlet valve (300) through a pipeline; The box body (31) is provided with a circulating water outlet (301) and a circulating water inlet (302), the circulating water outlet (301) is connected to the circulating pump (30), and the circulating water inlet (302) is connected to the process equipment (6); An electric heating wire (33) is arranged in the box (31).

6. The cryogenic liquid vaporization device according to claim 5, characterized in that: The electric heating wire (33) is spirally coiled around the outer circumference of the water bath tube (32).

7. The low-temperature liquid vaporization device according to any one of claims 1 to 6, characterized in that: The first valve (100), the second valve (200), the outlet valve (300) and the circulation pump (30) are all electrically connected to the controller (7); The controller (7) is also electrically connected to the air temperature sensor (71).

Images