A high-purity low-temperature liquid gas safety production device and method

Abstract

The present invention provides a high-purity and low-temperature liquid gas safety production device and method. The high-purity and low-temperature liquid gas safety production device comprises a first tank body, the bottom inner wall of the first tank body is fixedly connected to a telescopic rod, the output end of the telescopic rod is fixedly connected to a lifting plate, the upper surface of the lifting plate is threadedly connected to a connecting rod, the inner surface of the first tank body is slidably connected to an adsorber, the inner surface of the first tank body is fixedly connected to a partition, the inner surface of the first tank body is fixedly connected to a cooler, and the upper surface of the lifting plate is provided with a first valve. Through two lifting plates that are lifted and lowered at the same time, and the left and right sides can be lifted and lowered alternately, the pressure can be kept stable in the stage of pressurized adsorption, and it can be carried out continuously to increase the purity of the separation. Through the baffle and the second valve, the device can achieve reduced pressure diffusion during use to complete further separation and increase the purity of the liquid nitrogen.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid gas production, and in particular to a high-purity and low-temperature liquid gas safety production device and method. Background Art

[0002] In our lives, there is a kind of liquid gas used in food quick freezing, medical cosmetology, industrial production, etc. It is also a widely used industrial gas. This liquid gas is liquid nitrogen. Liquid nitrogen is the liquid gas of nitrogen. It has the same chemical properties as nitrogen. It is colorless, odorless, non-irritating, non-flammable and non-combustible. It is a relatively safe liquid gas. Liquid nitrogen is mainly produced by air separation and fractionation. First, the air needs to be purified. After purification, it becomes a liquefied gas under pressure and cooling. The temperature of liquid nitrogen is extremely low, at minus 196°C. Although there is no problem with contacting liquid nitrogen for a moment, it is best not to directly contact liquid nitrogen for safety reasons, which will cause frostbite to the human body.

[0003] When applying for the present invention, the applicant found through search that a Chinese patent disclosed a "device and method for deep-cold separation and production of high-purity liquid nitrogen", and its application number is "CN202111311582.1". This patent mainly uses a regulating valve to rotate the nozzle blades and change the tangent angle between the nozzle and the impeller. The tangent angle adjustment range is 5 to 20°, thereby changing the flow area of ​​the inlet, and then changing the flow rate of the expander, changing its cooling capacity, and improving the nitrogen production refrigeration effect. However, in the process of freeze-drying and filtering the gas, the pressure is difficult to control stably, resulting in oxygen being easily desorbed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a high-purity, low-temperature liquid gas safety production device and method, which solves the problem of easy desorption of oxygen due to the difficulty in stably controlling the pressure during freeze-drying and filtering of the gas.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A high-purity low-temperature liquid gas safety production device, comprising:

[0008] A first tank body, wherein a telescopic rod is fixedly connected to the bottom inner wall of the first tank body, a lifting plate is fixedly connected to the output end of the telescopic rod, a connecting rod is threadedly connected to the upper surface of the lifting plate, an adsorber is slidably connected to the inner surface of the first tank body, a partition is fixedly connected to the inner surface of the first tank body, a cooling machine is fixedly connected to the inner surface of the first tank body, a first valve is arranged on the upper surface of the lifting plate, a baffle is fixedly connected to the inner surface of the first tank body, and a second valve is arranged on the upper surface of the baffle;

[0009] A second tank body, a filter screen is fixedly connected to the inner surface of the second tank body, a precooling plate is fixedly connected to the inner surface of the second tank body, a horizontal plate is fixedly connected to the inner surface of the second tank body, a supercharger is fixedly connected to the inner surface of the horizontal plate, and a separator is fixedly connected to the inner surface of the second tank body;

[0010] A conduit is fixedly connected to the upper surface of the first tank body, a pump body is fixedly connected between the conduits, one end of the conduit away from the first tank body is fixedly connected to the fourth tank body, the right end of the first tank body is fixedly connected to the second connecting pipe, and the right end of the second connecting pipe is fixedly connected to the third tank body.

[0011] Preferably, there are two lifting plates distributed up and down, the upper lifting plate is threadedly connected to the connecting rod, the outer surface of the connecting rod is threadedly connected to the nut, the inside of the adsorber is fixedly connected with an elastic pad, the middle part of the connecting rod is smooth, and the connecting rod and the elastic pad are slidably connected to facilitate sealing.

[0012] Preferably, a sealing gasket is provided on the outer surface of the lifting plate, the number of the telescopic rods is multiple and distributed on the left and right, and the sealing gasket is slidably connected to the first tank body and the partition.

[0013] Preferably, the number of the pre-cooling plates is multiple and distributed at intervals, a first connecting pipe is fixedly connected to the right surface of the second tank body, and the right end of the first connecting pipe is fixedly connected to the cooling machine.

[0014] Preferably, the rear surfaces of the third tank body and the fourth tank body are both provided with discharge holes, and the interior of the second connecting pipe is provided with a ball valve.

[0015] Preferably, the first tank body, the second tank body, the third tank body and the fourth tank body are all made of heat-insulating materials, and the cooler, the pre-cooling plate, the pump body and the second valve are all connected to an external power supply.

[0016] Preferably, the front surfaces of the first tank body and the second tank body are both provided with a box door, the front surfaces of the box door are provided with a groove, the upper surface of the second tank body is provided with an air intake pipe, the lower end of the air intake pipe extends to the interior of the second tank body, and the second valve is an electric valve.

[0017] A method for safely producing high-purity and low-temperature liquid gas, comprising: S1. passing the gas into a second tank, filtering it first, precooling it, and pressurizing it through a supercharger;

[0018] S2. Separate the solid impurities through the separator, cool them through the cooler, and alternately pass through the first valve 5;

[0019] S3. After passing through the first valve, it enters between the two lifting plates, and the telescopic rod pushes the lifting plates to move to complete the adsorption;

[0020] S4. After the adsorption is completed, the second valve is opened to complete the decompression. The remaining oxygen is separated and collected through the pump body, and the liquid nitrogen is collected through the second connecting pipe.

[0021] (III) Beneficial effects

[0022] The present invention provides a high-purity and low-temperature liquid gas safety production device and method. It has the following beneficial effects:

[0023] 1. The high-purity and low-temperature liquid gas safety production device and method can maintain a stable pressure during the pressurized adsorption stage through two lifting plates that can be lifted and lowered simultaneously, and the left and right sides can be lifted and lowered alternately, and can be carried out continuously to increase the purity of the separation.

[0024] 2. The high-purity and low-temperature liquid gas safety production device and method realizes reduced pressure diffusion during use of the device to complete further separation and increase the purity of liquid nitrogen through the baffle and the second valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0027] Figure 3 for Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 4 A top view of the present invention;

[0029] Figure 5 It is a schematic diagram of the overall structure of the present invention.

[0030] Among them, 1. the first tank body; 2. the telescopic rod; 3. the cooler; 4. the lifting plate; 5. the first valve; 6. the adsorber; 7. the connecting rod; 8. the nut; 9. the elastic pad; 10. the baffle; 11. the second valve; 12. the second tank body; 13. the precooling plate; 14. the horizontal plate; 15. the supercharger; 16. the separator; 17. the first connecting pipe; 18. the third tank body; 19. the fourth tank body; 20. the discharge hole; 21. the pump body; 22. the conduit; 23. the air inlet pipe; 24. the filter; 25. the second connecting pipe; 26. the ball valve; 27. the box door. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-5 As shown, an embodiment of the present invention provides a high-purity and low-temperature liquid gas safety production device, including a first tank body 1, wherein the first tank body 1, the second tank body 12, the third tank body 18, and the fourth tank body 19 are all made of heat-insulating materials, the cooler 3, the pre-cooling plate 13, the pump body 21, and the second valve 11 are all connected to an external power supply, and the front surfaces of the first tank body 1 and the second tank body 12 are provided with a box door 27, and the front surface of the box door 27 is provided with a groove, and the bottom inner wall of the first tank body 1 is fixedly connected with a telescopic rod 2 for adjusting the height of a lifting plate 4, and the output end of the telescopic rod 2 is fixedly connected with the lifting plate 4, and the upper surface of the lifting plate 4 is threadedly connected with a connecting rod 7, and the inner surface of the first tank body 1 is slidably connected with an adsorber 6, and the purified and dried compressed air is pressurized and adsorbed in the adsorber 6. Due to the aerodynamic effect, the diffusion rate of oxygen in the micropores of the carbon molecular sieve is much greater than that of nitrogen, and oxygen is preferentially adsorbed by the carbon molecular sieve, and nitrogen is preferentially adsorbed in the carbon molecular sieve. The nitrogen in the gas phase is enriched to form finished nitrogen. A partition is fixedly connected to the inner surface of the first tank body 1. A cooler 3 is fixedly connected to the inner surface of the first tank body 1 for reducing the temperature of the gas to the target value. A first valve 5 is arranged on the upper surface of the lifting plate 4. There are two lifting plates 4 distributed up and down. The upper lifting plate 4 is threadedly connected to the connecting rod 7. The outer surface of the connecting rod 7 is threadedly connected to the nut 8. An elastic pad 9 is fixedly connected to the inside of the adsorber 6. The middle part of the connecting rod 7 is smooth. The connecting rod 7 is slidably connected to the elastic pad 9 for easy sealing. A sealing pad is arranged on the outer surface of the lifting plate 4. There are multiple telescopic rods 2 distributed left and right. The sealing pad is slidably connected to the first tank body 1 and the partition. A baffle 10 is fixedly connected to the inner surface of the first tank body 1. A second valve 11 is arranged on the upper surface of the baffle 10. After reducing the pressure to normal pressure, the adsorbent desorbs the adsorbed oxygen and other impurities to achieve regeneration.

[0033] The second tank body 12, the inner surface of the second tank body 12 is fixedly connected with a filter screen 24 for removing dust, the inner surface of the second tank body 12 is fixedly connected with a precooling plate 13, the number of precooling plates 13 is multiple and spaced apart, the right surface of the second tank body 12 is fixedly connected with a first connecting pipe 17, the upper surface of the second tank body 12 is provided with an air intake pipe 23, the lower end of the air intake pipe 23 extends to the interior of the second tank body 12, the second valve 11 is an electric valve, the right end of the first connecting pipe 17 is fixedly connected to the cooling machine 3, the inner surface of the second tank body 12 is fixedly connected with a horizontal plate 14, the inner surface of the horizontal plate 14 is fixedly connected with a supercharger 15, and the inner surface of the second tank body 12 is fixedly connected with a separator 16 for separating impurities.

[0034] A conduit 22 is fixedly connected to the upper surface of the first tank body 1, a pump body 21 is fixedly connected between the conduits 22, one end of the conduit 22 away from the first tank body 1 is fixedly connected to the fourth tank body 19 for storing other gases, a second connecting pipe 25 is fixedly connected to the right end of the first tank body 1, and the right end of the second connecting pipe 25 is fixedly connected to the third tank body 18 for storing liquid nitrogen, and the rear surfaces of the third tank body 18 and the fourth tank body 19 are both provided with discharge holes 20, and a ball valve 26 is provided inside the second connecting pipe 25.

[0035] A safe production method for high-purity and low-temperature liquid gas, S1. The gas is passed into a second tank body 12, first filtered, then pre-cooled, and pressurized by a supercharger 15, S2. Solid impurities are separated by a separator 16, and then cooled by a cooler 3, and alternately passed through a first valve 5, S3. After passing through the first valve 5, the gas enters between two lifting plates 4, and the telescopic rod 2 pushes the lifting plates 4 to move to complete adsorption, S4. After the adsorption is completed, the second valve 11 is opened to complete the decompression, and the remaining oxygen is separated and collected by a pump body 21, and the liquid nitrogen is collected by a second connecting pipe 25.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-purity low-temperature liquid gas safety production device, characterized in that: include: A first tank body (1), wherein a telescopic rod (2) is fixedly connected to the bottom inner wall of the first tank body (1), a lifting plate (4) is fixedly connected to the output end of the telescopic rod (2), a connecting rod (7) is threadedly connected to the upper surface of the lifting plate (4), an adsorber (6) is slidably connected to the inner surface of the first tank body (1), a partition is fixedly connected to the inner surface of the first tank body (1), a cooling machine (3) is fixedly connected to the inner surface of the first tank body (1), a first valve (5) is arranged on the upper surface of the lifting plate (4), a baffle (10) is fixedly connected to the inner surface of the first tank body (1), and a second valve (11) is arranged on the upper surface of the baffle (10); A second tank body (12), a filter screen (24) is fixedly connected to the inner surface of the second tank body (12), a precooling plate (13) is fixedly connected to the inner surface of the second tank body (12), a horizontal plate (14) is fixedly connected to the inner surface of the second tank body (12), a supercharger (15) is fixedly connected to the inner surface of the horizontal plate (14), and a separator (16) is fixedly connected to the inner surface of the second tank body (12); A conduit (22) is fixedly connected to the upper surface of the first tank body (1), a pump body (21) is fixedly connected between the conduits (22), an end of the conduit (22) away from the first tank body (1) is fixedly connected to a fourth tank body (19), a right end of the first tank body (1) is fixedly connected to a second connecting pipe (25), and a right end of the second connecting pipe (25) is fixedly connected to a third tank body (18); The number of the lifting plates (4) is two and they are distributed up and down. The upper lifting plate (4) is threadedly connected to the connecting rod (7). The outer surface of the connecting rod (7) is threadedly connected to the nut (8). The interior of the adsorber (6) is fixedly connected with an elastic pad (9). The middle part of the connecting rod (7) is smooth. The connecting rod (7) and the elastic pad (9) are slidably connected.

2. A high-purity and low-temperature liquid gas safety production device according to claim 1, characterized in that: The outer surface of the lifting plate (4) is provided with a sealing pad, the number of the telescopic rods (2) is multiple and distributed on the left and right, and the sealing pad is slidably connected to the first tank body (1) and the partition.

3. A high-purity and low-temperature liquid gas safety production device according to claim 1, characterized in that: The number of the pre-cooling plates (13) is multiple and distributed at intervals, and a first connecting pipe (17) is fixedly connected to the right surface of the second tank body (12), and the right end of the first connecting pipe (17) is fixedly connected to the cooling machine (3).

4. A high-purity and low-temperature liquid gas safety production device according to claim 1, characterized in that: The rear surfaces of the third tank body (18) and the fourth tank body (19) are both provided with discharge holes (20), and the interior of the second connecting pipe (25) is provided with a ball valve (26).

5. A high-purity and low-temperature liquid gas safety production device according to claim 1, characterized in that: The first tank body (1), the second tank body (12), the third tank body (18), and the fourth tank body (19) are all made of heat-insulating materials, and the cooling machine (3), the pre-cooling plate (13), the pump body (21), and the second valve (11) are all connected to an external power source.

6. A high-purity and low-temperature liquid gas safety production device according to claim 1, characterized in that: The front surfaces of the first tank body (1) and the second tank body (12) are both provided with a box door (27), the front surfaces of the box door (27) are provided with a groove, the upper surface of the second tank body (12) is provided with an air intake pipe (23), the lower end of the air intake pipe (23) extends to the interior of the second tank body (12), and the second valve (11) is an electric valve.

7. A method for safe production of high-purity and low-temperature liquid gas, based on a device for safe production of high-purity and low-temperature liquid gas according to any one of claims 1 to 6, comprising the following specific steps: S1. The gas is passed into the second tank (12), filtered, pre-cooled, and pressurized by a supercharger; S2. Separating solid impurities through a separator (16), cooling through a cooler (3), and alternately passing through a first valve (5); S3. After passing through the first valve (5), it enters between the two lifting plates (4), and the telescopic rod 2 pushes the lifting plate (4) to move to complete the adsorption; S4. After the adsorption is completed, the second valve (11) is opened to complete the decompression. The remaining oxygen is separated and collected by the pump body (21), and the liquid nitrogen is collected by the second connecting pipe (25).

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