A cryogenic air separation device for gas separation and purification

Abstract

The present invention discloses a cryogenic air separation device for gas separation and purification, and specifically relates to the field of cryogenic air separation technology, including a device housing, a control box is fixedly installed on the middle side of the front surface of the device housing, a rectangular groove is provided in the inner cavity of the device housing, an air inlet pipe is fixedly connected to the lower right side of the outer surface of the device housing and extends to the inner surface of the rectangular groove, and a refrigeration liquefaction mechanism is fixedly installed on the upper inner surface of the device housing. The cryogenic air separation device for gas separation and purification described in the present invention can be provided with a partitioning component, so that oxygen and nitrogen in the air can be subjected to refrigeration partition extraction operations according to their different boiling points, so that the extracted liquid oxygen and liquid nitrogen will not mix in the inner cavity of the device housing, and the extraction liquid is prevented from containing both nitrogen and oxygen, thereby effectively improving the purity of liquid nitrogen and liquid oxygen, and facilitating the extraction of liquid nitrogen and liquid oxygen.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic air separation, and in particular to a cryogenic air separation device for gas separation and purification. Background Art

[0002] Cryogenic air separation is a technology that uses the difference in boiling points of the components in the air to separate air into high-purity oxygen and nitrogen through deep freezing and separation equipment (such as distillation towers). This technology is widely used in the fields of petroleum refining, chemical industry, electronics, medicine, etc., with the advantages of high product purity, low production cost, and low energy consumption. Cryogenic air separation technology not only improves industrial production efficiency, but also promotes the development of new energy and environmental protection fields.

[0003] Chinese patent announcement number CN118089336A discloses a cryogenic air separation device for gas separation and purification, including a tower body and a reboiler fixedly connected to the lower end of the tower body, an exchange table is rotatably connected to the inner side of the tower body, a plurality of air holes are provided on the top of the exchange table, and the plurality of air holes are radially distributed, an annular groove is provided on the upper side of the exchange table, a drainage slot is provided on the bottom side of the annular groove, a plurality of No. 2 limit rods are fixedly connected to the lower side of the exchange table, and a sealing cone is slidably connected to one side of the plurality of No. 2 limit rods. The present invention cooperates with each other through a sealing plate, a scraper, an exchange table and a wire drawing, and when the next other gas or liquefied gas is separated, the separated gas or liquefied gas remaining on the inner wall of the distillation tower in the previous link can be removed and processed, thereby improving the purity of gas separation and purification and ensuring the quality of the extracted gas; however, the above patent document still has the following defects during implementation:

[0004] Although the above patent can scrape the inner wall of the distillation tower during implementation, it is unable to realize the liquefaction of oxygen and nitrogen in the air in separate areas, so that liquid nitrogen and liquid oxygen are easily mixed together when extracted after liquefaction. The liquid contains both nitrogen and oxygen and is no longer a single pure substance, which reduces the purity of the extracted liquid nitrogen and liquid oxygen and makes it inconvenient to extract liquid nitrogen and liquid oxygen. Summary of the invention

[0005] The main purpose of the present invention is to provide a cryogenic air separation device for gas separation and purification, which can effectively solve the problem that liquid nitrogen and liquid oxygen are easily mixed together during extraction.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a deep cold air separation device for gas separation and purification, comprising a device shell, a control box is fixedly installed on the middle side of the front outer surface of the device shell, a rectangular groove is opened in the inner cavity of the device shell, an air intake pipe is fixedly connected to the lower right side of the outer surface of the device shell through and extending to the inner surface of the rectangular groove, a refrigeration liquefaction mechanism is fixedly installed on the upper part of the inner surface of the device shell, a solenoid valve is fixedly connected to the right middle side of the inner surface of the device shell through and extending to the outer surface of the device shell, a pretreatment component is jointly provided on the inner surface of the rectangular groove and the lower end of the device shell, and a partition component is provided on the inner surface of the device shell.

[0007] Preferably, the pretreatment component includes an arcuate groove frame fixedly connected to the lower part of the inner surface of the device shell, the lower end of the device shell is fixedly connected to a water tank, the inner surface of the water tank and the inner surface of the rectangular groove are jointly provided with a water curtain mechanism, and a pushing mechanism is provided on the left side of the lower part of the inner surface of the arcuate groove frame.

[0008] Preferably, the water curtain mechanism includes four rectangular plates linearly and staggeredly distributed and fixedly connected to the inner surface of the rectangular groove, overflow grooves are opened at the lower ends of the upper rectangular plates, three sewage pipes are linearly distributed, penetrate through and extend to the upper part of the inner surface of the rectangular groove and are fixedly connected to the upper part of the inner surface of the water tank, an L-shaped filter is fixedly connected to the inner surface of the water tank, a waterproof and breathable membrane is fixedly connected to the inner surface of the rectangular groove on the left side of the rectangular plate, a connecting pipe is fixedly connected to the upper left side of the inner surface of the water tank, and a water pump is fixedly connected to the lower end of the connecting pipe.

[0009] Preferably, the pushing mechanism includes a connecting pipe that passes through the left side of the lower inner surface of the arc groove frame and extends to the upper inner surface of the rectangular groove and is fixedly connected; the inner surface of the connecting pipe is slidably connected to a circular hole block; the upper end of the circular hole block is fixedly connected to a round rod slidably connected to the connecting pipe; the upper end of the round rod is fixedly connected to a round block that is adapted to the size and shape of the inner surface of the connecting pipe; the outer surface of the round rod is sleeved with a spring; the two ends of the spring are respectively fixedly connected to the lower end of the round block and the outer surface of the connecting pipe.

[0010] Preferably, the partition assembly includes a T-shaped slot opened on the left part of the inner surface of the device shell, the inner surface of the T-shaped slot is provided with a lifting mechanism, the upper and lower parts of the inner surface of the T-shaped slot are symmetrically provided with protective mechanisms, the upper part of the outer surface of the lifting mechanism and the upper part of the outer surface of the arc groove frame are jointly provided with an ejection mechanism, the lower right part of the inner surface of the arc groove frame is provided with a buoyancy mechanism, and the upper right part of the inner surface of the device shell is provided with a discharge mechanism.

[0011] Preferably, the lifting mechanism includes a slider slidingly connected to the inner surface of the T-shaped groove, the upper end of the device shell penetrates and extends to the lower part of the inner surface of the T-shaped groove and is rotatably connected to a threaded rod threadedly connected to the slider, the right part of the outer surface of the slider is fixedly connected to an arc surface groove frame 2, the upper end of the threaded rod is fixedly connected to a servo motor fixedly connected to the upper end of the device shell, a rectangular hole is opened on the upper left side of the outer surface of the arc surface groove frame 2, and a discharge port is opened on the right part of the inner surface of the arc surface groove frame 2.

[0012] Preferably, the protective mechanism includes a fixed rod, and circular grooves fixedly connected to both ends of the fixed rod are symmetrically opened on the upper and lower parts of the inner surface of the T-shaped groove. A spring is fixedly connected to the outer surface of the fixed rod, and one end of the spring is fixedly connected to a protective cloth fixedly connected to one end of the slider.

[0013] Preferably, the ejection mechanism includes an ejection block fixedly connected to the left side of the upper outer surface of the arc surface groove frame 1, the upper outer surface of the arc surface groove frame 2 is fixedly connected to a rectangular frame at the rectangular hole, the upper end of the rectangular frame is provided with a placement groove, and the lower inner surface of the placement groove is annularly distributed and fixedly connected with four springs 2, and the upper ends of the four springs 2 are commonly fixedly connected to a arc surface sealing plate.

[0014] Preferably, the buoyancy mechanism includes a liquid oxygen discharge pipe that passes through the right side of the lower inner surface of the arc groove frame and extends to the outer surface of the device shell and is fixedly connected to it; a connecting block is symmetrically fixedly connected to the right side of the lower inner surface of the arc groove frame; the inner surfaces of the two connecting blocks are rotatably connected to a blocking block; the upper end of the blocking block is fixedly connected to a pull rope, and the upper end of the pull rope is fixedly connected to a buoyancy ball.

[0015] Preferably, the discharge mechanism includes a connecting arc block fixedly connected to the upper right side of the inner surface of the device shell, and two discharge pipes are linearly distributed on the upper right side of the inner surface of the device shell and extend to the outer surface of the device shell and are fixedly connected thereto. A sliding rod is slidably connected to the inner surface of the connecting arc block, and an arc block is symmetrically fixedly connected to the upper and lower ends of the sliding rod. Springs three are sleeved on the upper and lower parts of the outer surface of the sliding rod, and the two ends of the two springs three are respectively fixedly connected to one end of the arc block close to each other and one end of the connecting arc block away from each other. An air pump fixedly connected to the discharge pipe located at the upper part is fixedly connected to the upper right side of the outer surface of the device shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, by providing a partitioning component, the oxygen and nitrogen in the air can be subjected to refrigeration partition extraction operations according to their different boiling points, so that the extracted liquid oxygen and liquid nitrogen will not mix in the inner cavity of the device shell, avoiding the extraction liquid containing both nitrogen and oxygen, thereby effectively improving the purity of liquid nitrogen and liquid oxygen, and facilitating the extraction operation of liquid nitrogen and liquid oxygen.

[0018] In the present invention, by providing a lifting mechanism, the second arc surface groove frame can scrape the liquid oxygen adhering to the inner surface of the device shell during the downward movement, so that the liquid oxygen can be collected in the first arc surface groove frame, thereby avoiding the waste of liquid oxygen. At the same time, during the descending process, the air without liquid nitrogen extraction enters the space formed by the second arc surface groove frame and the device shell, thereby realizing partitioned extraction. After the liquid nitrogen is extracted, the second arc surface groove frame moves upward, thereby scraping and collecting the liquid nitrogen adhering to the inner surface of the device shell, and the waste gas is discharged from the device shell during the upward movement, thereby making full use of the liquid nitrogen and liquid oxygen.

[0019] In the present invention, by providing a water curtain mechanism and a pushing mechanism, the water in the connecting pipe can form a water curtain through the rectangular plate to filter dust and particles in the air, thereby improving the purity of subsequent liquid nitrogen and liquid oxygen. At the same time, under the movement of water, the round block can open or close the connecting pipe, and while realizing linkage, the entry or closing of air can be controlled, so that the device shell can be automatically in a sealed state when extracting liquid nitrogen or liquid oxygen, thereby improving the extraction purity of liquid nitrogen and liquid oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the T-shaped groove and the circular groove of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the pre-processing component and the partitioning component of the present invention;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the water curtain mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the explosion effect of the propulsion mechanism of the present invention;

[0026] Figure 7 It is a schematic diagram of the lifting mechanism structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the protection mechanism of the present invention;

[0028] Fig. 9 It is a schematic diagram of the explosion effect of the ejection mechanism of the present invention;

[0029] Fig.10 It is a schematic diagram of the cross-sectional structure of the ejector block of the present invention;

[0030] Fig.11 It is a schematic diagram of the explosion effect of the buoyancy mechanism of the present invention;

[0031] Fig.12 It is a schematic diagram of the explosion effect of the discharge mechanism of the present invention.

[0032] In the figure: 1. device housing; 2. control box; 3. air inlet pipe; 4. refrigeration liquefaction mechanism; 5. rectangular groove; 6. pretreatment component; 61. arc surface groove frame one; 62. water tank; 63. water curtain mechanism; 631. connecting pipe; 632. rectangular plate; 633. overflow groove; 634. sewage pipe; 635. L-shaped filter; 636. waterproof breathable membrane; 637. water pump; 64. pushing mechanism; 641. connecting pipe; 642. round hole block; 643. round rod; 644. round block; 645. spring one; 7. partition assembly; 71. lifting mechanism; 711. slider; 712. threaded rod; 713. servo motor; 714. arc surface groove frame two ;715, rectangular hole;716, discharge port;72, protective mechanism;721, circular groove;722, fixing rod;723, spring;724, protective cloth;73, ejection mechanism;731, rectangular frame;732, placement groove;733, spring two;734, arc surface blocking plate;735, ejection block;74, buoyancy mechanism;741, liquid oxygen discharge pipe;742, connecting block;743, blocking block;744, pull rope;745, buoyancy ball;75, discharge mechanism;751, discharge pipe;752, air pump;753, connecting arc block;754, slide rod;755, spring three;756, arc surface block;76, T-slot;8, solenoid valve. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1, as Figure 1 and Figure 2As shown, a cryogenic air separation device for gas separation and purification comprises a device shell 1, a control box 2 is fixedly installed on the middle side of the front of the outer surface of the device shell 1, a rectangular groove 5 is opened in the inner cavity of the device shell 1, an air inlet pipe 3 is fixedly connected to the lower right side of the outer surface of the device shell 1 and extends to the inner surface of the rectangular groove 5, a refrigeration liquefaction mechanism 4 is fixedly installed on the upper part of the inner surface of the device shell 1, a solenoid valve 8 is fixedly connected to the middle side of the right part of the inner surface of the device shell 1 and extends to the outer surface of the device shell 1, a pretreatment component 6 is jointly provided on the inner surface of the rectangular groove 5 and the lower end of the device shell 1, and a partition component 7 is provided on the inner surface of the device shell 1.

[0035] During the implementation of this embodiment, the control box 2 is operated so that air enters the rectangular groove 5 through the air inlet pipe 3. At this time, the filtered air is filtered for the second time by the pretreatment component 6, so that a small amount of dust and particles retained in the air are retained. At the same time, the filtered air is introduced into the inner cavity of the device shell 1, and the air flow in the inner cavity of the device shell 1 is controlled by the solenoid valve 8. At this time, the air is gradually cooled by the refrigeration liquefaction mechanism 4. Due to the different boiling points of oxygen and nitrogen in the air, as the temperature drops, liquid oxygen is first obtained, and liquid nitrogen is obtained secondly. Through the partition component 7, the liquid oxygen and liquid nitrogen can be liquefied in separate partitions, thereby realizing the separation and purification of oxygen and nitrogen in the air.

[0036] The refrigeration and liquefaction mechanism 4 mentioned above is a mature refrigeration technology means in the prior art, and is a mature refrigeration equipment in the prior art. In this solution, it is used to cool the oxygen and nitrogen in the air and liquefy the oxygen and nitrogen, and its structure and principle are not further explained.

[0037] The solenoid valve 8 mentioned above is a mature technical control means in the prior art. In this solution, its function of controlling the flow of air is utilized, and its structure and principle are not further elaborated.

[0038] The control box 2 mentioned above is a mature control technology means in the prior art, and is a mature control device in the prior art. In this solution, the controllable functions thereof are utilized, and its structure and principle are not further elaborated.

[0039] Specifically, in order to pre-treat the dust and particles in the air entering the device housing 1, refer to Figure 4 , Figure 5 and Figure 6 In this embodiment, the pretreatment component 6 includes an arc groove frame 61 fixedly connected to the lower part of the inner surface of the device shell 1, a water tank 62 is fixedly connected to the lower end of the device shell 1, and a water curtain mechanism 63 is jointly provided on the inner surface of the water tank 62 and the inner surface of the rectangular groove 5, and a pushing mechanism 64 is provided on the left side of the lower part of the inner surface of the arc groove frame 61.

[0040] For further information, see Figure 4 and Figure 5 In this embodiment, the water curtain mechanism 63 includes four rectangular plates 632 that are linearly and staggeredly distributed and fixedly connected to the inner surface of the rectangular groove 5. Overflow grooves 633 are opened at the lower ends of the upper rectangular plates 632. Three sewage pipes 634 are linearly distributed and extend to the upper inner surface of the water tank 62 and are fixedly connected. An L-shaped filter screen 635 is fixedly connected to the inner surface of the water tank 62. A waterproof and breathable membrane 636 is fixedly connected to the inner surface of the rectangular groove 5 on the left side of the rectangular plate 632. A connecting pipe 631 is fixedly connected to the rear part of the inner surface of the overflow groove 633 on the upper left side of the inner surface of the water tank 62, and a water pump 637 is fixedly connected to the lower end of the connecting pipe 631.

[0041] During the implementation process, when air enters the rectangular groove 5 through the air intake pipe 3, the water pump 637 is started at this time, so that the water pump 637 draws water from the water tank 62 into the connecting pipe 631, and then enters the rectangular plate 632 located at the upper part, and accumulates in the inner cavity of the overflow groove 633. When the water level is greater than the height of the overflow groove 633, the water will fall under the action of gravity to form a water curtain, so that the incoming air will be filtered and retained by the water curtain, and the dust and particles contained in the air will be filtered and retained.

[0042] Secondly, the filtered air will enter the left space of the rectangular groove 5 through the waterproof breathable membrane 636. The waterproof breathable membrane 636 prevents liquid water from entering the left space, thereby reducing humidity and improving the purity of the air when producing nitrogen and oxygen.

[0043] The waterproof breathable membrane 636 mentioned above is a mature technical means in the prior art. In this solution, its function of preventing liquid water from entering while not blocking the passage of air is utilized, and its structure and principle will not be elaborated any more.

[0044] For further information, see Figure 4 and Figure 6 In this embodiment, the pushing mechanism 64 includes a connecting pipe 641 that passes through the lower left side of the inner surface of the arc surface groove frame 61 and extends to the upper inner surface of the rectangular groove 5 and is fixedly connected. A circular hole block 642 is slidably connected to the inner surface of the connecting pipe 631. The upper end of the circular hole block 642 is fixedly connected to a round rod 643 that is slidably connected to the connecting pipe 631. The upper end of the round rod 643 is fixedly connected to a round block 644 that is adapted to the size and shape of the inner surface of the connecting pipe 631. A spring 645 is sleeved on the outer surface of the round rod 643. The two ends of the spring 645 are respectively fixedly connected to the lower end of the round block 644 and the outer surface of the connecting pipe 631.

[0045] As can be seen from the above, after the water pump 637 collects water in the water tank 62 and enters the connecting pipe 631, the water pump 637, under the pressurized action of the water pump 637, will push the circular hole block 642 to move upward, so that the circular hole block 642 pushes the circular block 644 on the round rod 643 to slide on the inner surface of the connecting pipe 641, and at the same time makes the spring 1 645 in a stretched state. When the circular hole block 642 moves to the upper part of the inner surface of the connecting pipe 631, the circular hole block 642 cannot move at this time. At the same time, the circular block 644 extends out of the inner cavity of the connecting pipe 641, so that the purified air can enter the inner cavity of the device housing 1 through the connecting pipe 641.

[0046] Secondly, when there is sufficient air in the device housing 1, the water pump 637 is turned off so that the circular hole block 642 is no longer impacted by the water. At this time, the circular hole block 642 will be reset under the tensile reaction of the spring 1 645, and the circular block 644 will be pulled into the inner cavity of the connecting pipe 641, so that the connecting pipe 641 is closed, and the inner cavity of the device housing 1 is in a closed state.

[0047] Embodiment 2: Based on Embodiment 1, this embodiment adds a partitioning component 7 for producing nitrogen and oxygen in the air in different zones, so as to achieve the purpose of producing liquid nitrogen and liquid oxygen in different zones.

[0048] Specifically, in order to partition the production of liquid nitrogen and liquid oxygen, refer to Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 In this embodiment, the partition component 7 includes a T-shaped groove 76 opened on the left part of the inner surface of the device shell 1, a lifting mechanism 71 is arranged on the inner surface of the T-shaped groove 76, and a protective mechanism 72 is symmetrically arranged on the upper and lower parts of the inner surface of the T-shaped groove 76. An ejection mechanism 73 is jointly arranged on the upper part of the outer surface of the lifting mechanism 71 and the upper part of the outer surface of the arc groove frame 61, a buoyancy mechanism 74 is arranged on the right part of the lower side of the inner surface of the arc groove frame 61, and a discharge mechanism 75 is arranged on the upper side of the right part of the inner surface of the device shell 1.

[0049] For further information, see Figure 4 and Fig.11 In this embodiment, the buoyancy mechanism 74 includes a liquid oxygen discharge pipe 741 that passes through the right side of the lower inner surface of the arc groove frame 61 and extends to the outer surface of the device shell 1 and is fixedly connected thereto; a connecting block 742 is symmetrically fixedly connected thereto on the right side of the lower inner surface of the arc groove frame 61; a sealing block 743 is connected to the inner surfaces of the two connecting blocks 742 for rotation together; a pull rope 744 is fixedly connected to the upper end of the sealing block 743; and a buoyancy ball 745 is fixedly connected to the upper end of the pull rope 744.

[0050] During the implementation process, after the air enters the inner cavity of the device shell 1, the refrigeration liquefaction mechanism 4 is started to make the temperature of the air reach the boiling point of oxygen. At this time, the oxygen is converted from gas to liquid. Under the action of gravity, most of the liquid oxygen will be concentrated on the inner surface of the arc groove frame 61 and collected on the inner surface of the arc groove frame 61. The gradual increase in the height of the liquid oxygen collected on the inner surface of the arc groove frame 61 will drive the buoyancy ball 745 to move upward, so that the pull rope 744 can pull the sealing block 743 to rotate on the inner surface of the connecting block 742, so that the upper end of the liquid oxygen discharge pipe 741 is no longer in a closed state. At this time, the liquid oxygen is discharged from the device shell 1 through the liquid oxygen discharge pipe 741 under the action of gravity, thereby realizing the separation of oxygen in the air.

[0051] For further information, see Figure 3 , Figure 4 and Figure 7 In this embodiment, the lifting mechanism 71 includes a slider 711 that is slidably connected to the inner surface of the T-shaped slot 76. The upper end of the device housing 1 passes through and extends to the lower part of the inner surface of the T-shaped slot 76 and is rotatably connected to a threaded rod 712 that is threadedly connected to the slider 711. The right part of the outer surface of the slider 711 is fixedly connected to an arc surface groove frame 714. The upper end of the threaded rod 712 is fixedly connected to a servo motor 713 that is fixedly connected to the upper end of the device housing 1. A rectangular hole 715 is opened on the upper left side of the outer surface of the arc surface groove frame 714, and a discharge port 716 is opened on the right part of the inner surface of the arc surface groove frame 714.

[0052] For further information, see Figure 4 , Fig. 9 and Fig.10 In this embodiment, the ejection mechanism 73 includes an ejection block 735 fixedly connected to the left side of the upper outer surface of the arc surface groove frame 1 61, and a rectangular frame 731 is fixedly connected to the upper outer surface of the arc surface groove frame 2 714 at the rectangular hole 715. A placement groove 732 is opened at the upper end of the rectangular frame 731, and four springs 2 733 are fixedly connected in a ring-shaped manner at the lower inner surface of the placement groove 732. The upper ends of the four springs 2 733 are commonly fixedly connected to a curved sealing plate 734.

[0053] During the implementation process, after the oxygen in the air entering the inner cavity of the device shell 1 is extracted, there is still nitrogen in the air that has not been extracted. At this time, the servo motor 713 is started, so that the output end of the servo motor 713 drives the threaded rod 712 to rotate, and under the action of the threaded connection, the slider 711 is driven to slide on the inner surface of the T-shaped groove 76, and then the slider 711 drives the arc surface groove frame 2 714 to move downward, so that the ejection block 735 is inserted into the rectangular hole 715. At this time, the top of the ejection block 735 will gradually push the arc surface sealing plate 734 to move upward, and make the spring 2 733 in a stretched state, and the arc surface sealing plate 734 will gradually move away from the inner surface of the placement groove 732 and the upper surface of the rectangular frame 731 The end allows air to enter the space formed by the arc surface groove frame 2 714 and the device shell 1 through the rectangular hole 715 and the rectangular frame 731. When the arc surface groove frame 2 714 moves to the set position, the air completely enters the upper space. At this time, the outer surface of the ejection block 735 is adapted to the size and shape of the inner surface of the rectangular hole 715, so that the rectangular hole 715 is blocked. The temperature is continuously lowered by the refrigeration liquefaction mechanism 4 and reaches the boiling point of nitrogen, so that the nitrogen is gradually liquefied. The liquefied nitrogen will fall on the inner surface of the arc surface groove frame 2 714 under the action of gravity and be collected, thereby realizing the separation of liquid nitrogen and liquid oxygen partitions, and no mixing of liquid nitrogen and liquid oxygen will occur, which can effectively improve the purity of liquid nitrogen and liquid oxygen.

[0054] Secondly, during the downward movement of the arc surface groove frame 2 714, the outer surface of the arc surface groove frame 2 714 can scrape the inner surface of the device housing 1, so that the liquid oxygen attached to the inner surface of the device housing 1 during the liquid oxygen production process can fall into the arc surface groove frame 1 61 under the scraping of the arc surface groove frame 2 714, so as to fully collect the liquid oxygen and avoid the waste of liquid oxygen.

[0055] For further information, see Figure 4 and Fig.12 In this embodiment, the discharge mechanism 75 includes a connecting arc block 753 fixedly connected to the upper right side of the inner surface of the device shell 1, and two discharge pipes 751 are linearly distributed on the upper right side of the inner surface of the device shell 1, extending to the outer surface of the device shell 1 and fixedly connected thereto. A sliding rod 754 is slidably connected to the inner surface of the connecting arc block 753, and an arc block 756 is symmetrically fixedly connected to the upper and lower ends of the sliding rod 754. Springs three 755 are sleeved on the upper and lower parts of the outer surface of the sliding rod 754, and the two ends of the two springs three 755 are respectively fixedly connected to one end close to the arc block 756 and the other end away from the connecting arc block 753. An air pump 752 fixedly connected to the discharge pipe 751 located at the upper part is fixedly connected to the upper right side of the outer surface of the device shell 1.

[0056] During the implementation process, after the liquid nitrogen is prepared, the servo motor 713 is started to drive the threaded rod 712 to rotate in the opposite direction, thereby driving the arc surface groove frame 2 on the slider 711 to move upward to 714, so that the outer surface of the arc surface groove frame 2 714 can scrape the liquid nitrogen attached to the inner surface of the device housing 1 during the nitrogen preparation process and collect it on the inner surface of the arc surface groove frame 2 714. When the arc surface groove frame 2 714 moves upward, the upper end of the arc surface groove frame 2 714 will squeeze the arc surface block 756 at the lower part, so that the arc surface block 756 squeezes the slide rod 754, so that the spring 3 755 at the lower part is in a compressed state, and the spring 3 755 at the upper part is compressed. In the stretched state, the two arc blocks 756 will be respectively away from the two discharge pipes 751. When the arc groove frame 714 moves to the set position, the discharge port 716 of the arc groove frame 714 is aligned with the discharge pipe 751 at the bottom. The liquid nitrogen collected in the arc groove frame 714 will be discharged through the discharge pipe 751 at the bottom. At the same time, the discharge pipe 751 at the top can discharge other impurity gases in the air out of the device housing 1 through the air pump 752, which is convenient for oxygen and nitrogen production operations again, so that liquid nitrogen and liquid oxygen can be produced in different areas during the production process, effectively avoiding the mixing of liquid nitrogen and liquid oxygen, and improving purity.

[0057] The discharge port 716 on the arc surface groove frame 2 714 is always in close contact with the inner surface of the device housing 1 .

[0058] For further information, see Figure 3 , Figure 4 and Figure 8 In this embodiment, the protective mechanism 72 includes a fixed rod 722, and circular grooves 721 fixedly connected to both ends of the fixed rod 722 are symmetrically opened on the upper and lower parts of the inner surface of the T-shaped groove 76. A spring 723 is fixedly connected to the outer surface of the fixed rod 722, and one end of the spring 723 is fixedly connected to a protective cloth 724 fixedly connected to one end of the slider 711.

[0059] During the implementation process, the up and down movement of the slider 711 will drive the protective cloth 724 to move, and then pull the spring 723 to deform. With the movement of the slider 711, the protective cloth 724 can always be in a taut state, so that the T-slot 76 can be blocked, effectively preventing liquid nitrogen and liquid oxygen from entering the inner surface of the T-slot 76 when producing nitrogen or oxygen, thereby avoiding the waste of liquid nitrogen and liquid oxygen.

[0060] Working process: when in use, air enters through the air inlet pipe 3, and dust and particles in the air are removed by the action of the water curtain mechanism 63. The filtered air can enter the inner cavity of the device shell 1 through the cooperation of the water curtain mechanism 63 and the pushing mechanism 64. Then, the air is cooled by the refrigeration and liquefaction mechanism 4, and the air is cooled to the boiling point of oxygen liquefaction, so that the oxygen is liquefied. The liquefied liquid oxygen is concentrated on the arc surface groove frame 1 61, and the first extracted liquid oxygen is discharged from the device shell 1 by the action of the buoyancy mechanism 74. Then, the arc surface groove frame 2 714 is lowered by the lifting mechanism 71 and the ejection mechanism 73, and the air is introduced into the space formed by the arc surface groove frame 2 714 and the device shell 1. Secondly, the temperature is continued to be lowered by the refrigeration and liquefaction mechanism 4, so that the temperature reaches the boiling point of nitrogen, so that the nitrogen is liquefied and remains in the arc surface groove frame 2 714, and the exhaust gas and liquid nitrogen are discharged from the device shell 1 by the cooperation of the discharge mechanism 75 and the lifting mechanism 71.

[0061] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A cryogenic air separation device for gas separation and purification, comprising a device housing (1), characterized in that: A control box (2) is fixedly mounted on the middle side of the front of the outer surface of the device housing (1); a rectangular groove (5) is provided in the inner cavity of the device housing (1); an air intake pipe (3) is fixedly connected to the lower right side of the outer surface of the device housing (1) through and extending to the inner surface of the rectangular groove (5); a refrigeration liquefaction mechanism (4) is fixedly mounted on the upper part of the inner surface of the device housing (1); a solenoid valve (8) is fixedly connected to the middle right side of the inner surface of the device housing (1) through and extending to the outer surface of the device housing (1); a pre-treatment component (6) is provided on the inner surface of the rectangular groove (5) and the lower end of the device housing (1); and a partition component (7) is provided on the inner surface of the device housing (1); The pretreatment component (6) comprises an arc surface groove frame (61) fixedly connected to the lower part of the inner surface of the device housing (1); a water tank (62) is fixedly connected to the lower end of the device housing (1); a water curtain mechanism (63) is provided on the inner surface of the water tank (62) and the inner surface of the rectangular groove (5); and a pushing mechanism (64) is provided on the left side of the lower part of the inner surface of the arc surface groove frame (61); The water curtain mechanism (63) comprises four rectangular plates (632) which are linearly and staggeredly distributed and fixedly connected to the inner surface of the rectangular groove (5); the lower ends of the rectangular plates (632) located at the upper part are each provided with an overflow groove (633); three sewage pipes (634) are linearly distributed on the lower part of the inner surface of the rectangular groove (5) and extend to the upper part of the inner surface of the water tank (62) and are fixedly connected; an L-shaped filter screen (635) is fixedly connected to the inner surface of the water tank (62); a waterproof and breathable membrane (636) is fixedly connected to the inner surface of the rectangular groove (5) on the left side of the rectangular plate (632); a connecting pipe (631) is fixedly connected to the left side of the upper part of the inner surface of the water tank (62) and extends to the rear part of the inner surface of the overflow groove (633); and a water pump (637) is fixedly connected to the lower end of the connecting pipe (631); The partition assembly (7) comprises a T-shaped groove (76) provided on the left portion of the inner surface of the device housing (1); a lifting mechanism (71) is provided on the inner surface of the T-shaped groove (76); a protection mechanism (72) is symmetrically provided on the upper and lower portions of the inner surface of the T-shaped groove (76); an ejection mechanism (73) is provided on the upper portion of the outer surface of the lifting mechanism (71) and the upper portion of the outer surface of the arc surface groove frame (61); a buoyancy mechanism (74) is provided on the right portion of the lower portion of the inner surface of the arc surface groove frame (61); and a discharge mechanism (75) is provided on the upper portion of the right portion of the inner surface of the device housing (1); The ejection mechanism (73) comprises an ejection block (735) fixedly connected to the left side of the upper outer surface of the arc surface groove frame (61); the upper outer surface of the arc surface groove frame (714) is fixedly connected to a rectangular frame (731) at the rectangular hole (715); a placement groove (732) is provided at the upper end of the rectangular frame (731); four springs (733) are fixedly connected in an annular manner at the lower inner surface of the placement groove (732); and the upper ends of the four springs (733) are fixedly connected to a arc surface blocking plate (734); The buoyancy mechanism (74) comprises a liquid oxygen discharge pipe (741) which passes through the right side of the lower inner surface of the arc surface groove frame (61) and extends to the outer surface of the device housing (1) and is fixedly connected thereto; a connecting block (742) is symmetrically fixedly connected to the right side of the lower inner surface of the arc surface groove frame (61); the inner surfaces of the two connecting blocks (742) are rotatably connected to a blocking block (743); the upper end of the blocking block (743) is fixedly connected to a pull rope (744); and the upper end of the pull rope (744) is fixedly connected to a buoyancy ball (745).

2. A cryogenic air separation device for gas separation and purification according to claim 1, characterized in that: The pushing mechanism (64) comprises a connecting pipe (641) penetrating the left side of the lower inner surface of the arc surface groove frame (61) and extending to the upper inner surface of the rectangular groove (5) and fixedly connected thereto; a circular hole block (642) is slidably connected to the inner surface of the connecting pipe (631); a round rod (643) slidably connected to the upper end of the circular hole block (642); a round block (644) matching the size and shape of the inner surface of the connecting pipe (631) is fixedly connected to the upper end of the round rod (643); a spring (645) is sleeved on the outer surface of the round rod (643); two ends of the spring (645) are respectively fixedly connected to the lower end of the round block (644) and the outer surface of the connecting pipe (631).

3. A cryogenic air separation device for gas separation and purification according to claim 1, characterized in that: The lifting mechanism (71) comprises a slider (711) slidably connected to the inner surface of the T-shaped groove (76); the upper end of the device housing (1) penetrates through and extends to the lower part of the inner surface of the T-shaped groove (76) and is rotatably connected to a threaded rod (712) threadedly connected to the slider (711); the right part of the outer surface of the slider (711) is fixedly connected to a second arc surface groove frame (714); the upper end of the threaded rod (712) is fixedly connected to a servo motor (713) fixedly connected to the upper end of the device housing (1); a rectangular hole (715) is opened on the left side of the upper part of the outer surface of the second arc surface groove frame (714); and a discharge port (716) is opened on the right part of the inner surface of the second arc surface groove frame (714).

4. A cryogenic air separation device for gas separation and purification according to claim 3, characterized in that: The protective mechanism (72) comprises a fixed rod (722); circular grooves (721) fixedly connected to both ends of the fixed rod (722) are symmetrically formed at the upper and lower parts of the inner surface of the T-shaped groove (76); a spring (723) is fixedly connected to the outer surface of the fixed rod (722); and one end of the spring (723) is fixedly connected to a protective cloth (724) fixedly connected to one end of the slider (711).

5. A cryogenic air separation device for gas separation and purification according to claim 1, characterized in that: The discharge mechanism (75) comprises a connecting arc block (753) fixedly connected to the upper right side of the inner surface of the device housing (1); two discharge pipes (751) are linearly distributed on the upper right side of the inner surface of the device housing (1) and extend to the outer surface of the device housing (1) and are fixedly connected; a slide rod (754) is slidably connected to the inner surface of the connecting arc block (753); an arc block (756) is symmetrically fixedly connected to the upper and lower ends of the slide rod (754); springs (755) are sleeved on the upper and lower parts of the outer surface of the slide rod (754); two ends of the two springs (755) are respectively fixedly connected to one end close to the arc block (756) and one end of the connecting arc block (753) away from each other; an air pump (752) fixedly connected to the discharge pipe (751) located at the upper part is fixedly connected to the upper right side of the outer surface of the device housing (1).

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