A pressure swing adsorption nitrogen production compression device

Abstract

The utility model belongs to the technical field of nitrogen production devices, specifically a pressure swing adsorption nitrogen production compression device, including a tank body, a sealing cover is provided on the upper surface of the tank body, an upper sieve plate is provided on the upper side of the inner wall of the tank body, and a lower sieve plate is provided on the lower side of the inner wall of the tank body. The utility model ensures that the carbon molecular sieve is in a compressed state by pressing the pressure plate on the upper sieve plate. At this time, the upper end of the anti-slip block abuts against the pressure sensor. When the carbon molecular sieve is loose, the spring makes the pressure plate still abut against the upper sieve plate through elastic force. When the pressure plate moves downward, it drives the slide bar to move downward. At this time, the pressure sensor detects that the pressure is reduced, and controls the hydraulic rod to push the lifting plate downward. The anti-slip block stops pushing when the pressure on the pressure sensor increases to the standard pressure, so that the carbon molecular sieve can always remain in a compressed state, has a large compression range, and can ensure the applied pressure, and is not prone to pulverization of the carbon molecular sieve and impure nitrogen production.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen making devices, in particular to a pressure swing adsorption nitrogen making and compacting device. Background Art

[0002] Pressure swing adsorption is a new gas separation technology. Its principle is to separate gas mixtures by using the difference in the "adsorption" performance of molecular sieves to different gas molecules. Pressure swing adsorption uses air as raw material, uses high-efficiency and highly selective solid adsorbents, and uses the selective adsorption performance of solid adsorbents to nitrogen and oxygen to separate nitrogen and oxygen in the air. Carbon molecular sieves and zeolite carbon molecular sieves are more commonly used in the field of nitrogen and oxygen production. Carbon molecular sieves and zeolite carbon molecular sieves are fine solid particles. The molecular sieves need to be pressed tightly when placed in the tank to prevent the molecular sieves from moving under the action of gas pressure.

[0003] Some existing clamping devices generally only use elastic parts such as springs to make the pressure plate adaptively clamped, and their clamping range is limited. Therefore, when the carbon molecular sieve sinks too much, it is difficult to ensure the clamping effect, which leads to pulverization of the carbon molecular sieve and impure nitrogen production. For this reason, a pressure swing adsorption nitrogen production clamping device is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure swing adsorption nitrogen production and compression device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure swing adsorption nitrogen production compression device, comprising a tank body, a sealing cover is provided on the upper surface of the tank body, an upper sieve plate is provided on the upper side of the inner side wall of the tank body, a lower sieve plate is provided on the lower side of the inner side wall of the tank body, a carbon molecular sieve is filled between the lower surface of the upper sieve plate and the upper surface of the lower sieve plate, a hydraulic rod is installed on the upper surface of the sealing cover, a pressing plate is provided on the upper surface of the upper sieve plate, a lifting plate is provided on the upper side of the pressing plate, uniformly distributed springs are fixedly connected between the lower surface of the lifting plate and the upper surface of the pressing plate, the inner side wall of the lifting plate is slidably connected with uniformly distributed sliding rods, the lower end of the sliding rods is fixedly connected to the upper surface of the pressing plate, the upper surface of the lifting plate is fixedly connected with uniformly distributed protective cylinders, a pressure sensor is installed on the upper side of the inner side wall of the protective cylinder, the upper surface of the lifting plate is fixedly connected to the output end of the hydraulic rod, and the lifting plate and the inner side wall of the pressing plate are provided with uniformly distributed through holes.

[0006] As a further preferred embodiment of the present technical solution: the lower surface of the tank body is connected to an air inlet pipe, and the upper surface of the sealing cover is connected to an air outlet pipe.

[0007] As a further preferred embodiment of the technical solution: a retaining ring is provided on the lower side of the lower sieve plate, and an outer side wall of the retaining ring is fixedly connected to the inner side wall of the tank body.

[0008] As a further preferred embodiment of the present technical solution: the inner wall of the tank body is slidably connected to a cylinder, the outer wall of the lower sieve plate is fixedly connected to the inner wall of the cylinder, and the outer wall of the upper sieve plate is slidably connected to the inner wall of the cylinder.

[0009] As a further preferred embodiment of the present technical solution: the outer wall of the tank body and the outer wall of the cover are both fixedly connected with a connecting flange, the inner wall of the connecting flange is inserted with evenly distributed bolts, and the outer wall of the bolt is threadedly connected with a nut.

[0010] As a further preferred embodiment of the present technical solution: a pair of blocking pieces are fixedly connected to the inner side wall of the through hole.

[0011] As a further preferred embodiment of the technical solution: an anti-slip block is slidably connected to the inner side wall of the protective tube, and a lower surface of the anti-slip block is fixedly connected to the upper end of the sliding rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model ensures that the carbon molecular sieve is in a compressed state by pressing the pressure plate on the upper sieve plate. At this time, the upper end of the anti-stripping block abuts against the pressure sensor. When the carbon molecular sieve loosens, the spring makes the pressure plate still abut against the upper sieve plate through elastic force. When the pressure plate moves downward, it drives the slide bar to move downward. At this time, the pressure sensor detects that the pressure is reduced, and controls the hydraulic rod to push the lifting plate downward. The anti-stripping block stops pushing when the pressure on the pressure sensor increases to the standard pressure, so that the carbon molecular sieve can always be kept in a compressed state. The utility model has a large compression range and can ensure the applied pressure, and it is not easy for the carbon molecular sieve to be pulverized and the nitrogen production to be impure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front structural schematic diagram of the utility model;

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0016] Figure 3 It is a cross-sectional structural schematic diagram of the air intake pipe, retaining ring and cylinder in the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the middle pressure plate, lifting plate and spring of the utility model;

[0018] Figure 5 It is a schematic cross-sectional structural diagram of the slide bar, the pressure sensor and the anti-dropping block in the utility model.

[0019] In the figure: 1. tank body; 2. sealing cover; 3. upper sieve plate; 4. lower sieve plate; 5. carbon molecular sieve; 6. hydraulic rod; 7. pressure plate; 8. lifting plate; 9. spring; 10. sliding rod; 11. protective tube; 12. pressure sensor; 13. through hole; 14. air inlet pipe; 15. air outlet pipe; 16. retaining ring; 17. cylinder; 18. connecting flange; 19. bolt; 20. nut; 21. retaining plate; 22. anti-slip block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] See also Figure 1-5The utility model provides a technical solution: a pressure swing adsorption nitrogen production and compacting device, comprising a tank body 1, a sealing cover 2 is provided on the upper surface of the tank body 1, an upper sieve plate 3 is provided on the upper side of the inner wall of the tank body 1, a lower sieve plate 4 is provided on the lower side of the inner wall of the tank body 1, a carbon molecular sieve 5 is filled between the lower surface of the upper sieve plate 3 and the upper surface of the lower sieve plate 4, a hydraulic rod 6 is installed on the upper surface of the sealing cover 2, a pressing plate 7 is provided on the upper surface of the upper sieve plate 3, a lifting plate 8 is provided on the upper side of the pressing plate 7, and the lower surface of the lifting plate 8 is in contact with the pressing plate 7. The upper surfaces of the lifting plate 8 are fixedly connected with uniformly distributed springs 9, the inner wall of the lifting plate 8 is slidably connected with uniformly distributed slide bars 10, the lower end of the slide bar 10 is fixedly connected to the upper surface of the pressing plate 7, the upper surface of the lifting plate 8 is fixedly connected with uniformly distributed protective tubes 11, a pressure sensor 12 is installed on the upper side of the inner wall of the protective tube 11, the upper surface of the lifting plate 8 is fixedly connected to the output end of the hydraulic rod 6, and the inner walls of the lifting plate 8 and the pressing plate 7 are provided with uniformly distributed through holes 13; gas passes through The carbon molecular sieve 5 adsorbs and separates oxygen and nitrogen, and the nitrogen passes upward through the through hole 13 and is discharged from the tank body 1, and is pressed on the upper sieve plate 3 by the pressure plate 7 to ensure that the carbon molecular sieve 5 is in a compressed state. At this time, the upper end of the slide bar 10 is against the pressure sensor 12, and the pressure at this time is recorded as the standard pressure. When the carbon molecular sieve 5 is loose, the spring 9 adapts to make the pressure plate 7 still against the upper sieve plate 3. When the pressure plate 7 moves downward, it drives the slide bar 10 to move downward. At this time, the pressure sensor 12 detects that the pressure is reduced, and the hydraulic rod 6 is controlled to push the lifting plate 8 downward. The spring 9 is compressed, and the pressure of the slide bar 10 on the pressure sensor 12 increases to the standard pressure, and the push of the hydraulic rod 6 is stopped, so that the carbon molecular sieve 5 can always remain in a compressed state, has a large compression range, and can ensure the applied pressure, and is not prone to carbon molecular sieve pulverization and impure nitrogen production. When filling is needed, the hydraulic rod 6 is controlled to contract and drive the lifting plate 8 to move into the cover 2, and the cover 2 is separated from the tank body 1 to fill the carbon molecular sieve 5 inward.

[0023] In this embodiment, specifically: the lower surface of the tank body 1 is connected to an air inlet pipe 14 , and the upper surface of the cover 2 is connected to an air outlet pipe 15 ; air enters the tank body 1 through the air inlet pipe 14 , and nitrogen is discharged through the air outlet pipe 15 .

[0024] In this embodiment, specifically: a retaining ring 16 is provided on the lower side of the lower sieve plate 4 , and the outer side wall of the retaining ring 16 is fixedly connected to the inner side wall of the tank body 1 ; the retaining ring 16 can support the lower sieve plate 4 .

[0025] In this embodiment, specifically: the inner wall of the tank body 1 is slidably connected to the cylinder 17, the outer wall of the lower sieve plate 4 is fixedly connected to the inner wall of the cylinder 17, and the outer wall of the upper sieve plate 3 is slidably connected to the inner wall of the cylinder 17; when replacement is required, the cylinder 17 can be taken out of the tank body 1, and the entire cylinder of carbon molecular sieve 5 can be replaced.

[0026] In this embodiment, specifically: the outer wall of the tank body 1 and the outer wall of the cover 2 are fixedly connected with a connecting flange 18, the inner wall of the connecting flange 18 is inserted with evenly distributed bolts 19, and the outer wall of the bolt 19 is threadedly connected with a nut 20; the bolts 19 with a strength of 8.8 are used in conjunction with the nuts 20 for locking to ensure the sealing performance.

[0027] In this embodiment, specifically: a pair of baffles 21 are fixedly connected to the inner side wall of the through hole 13; the baffles 21 can slow down the gas flow rate and reduce purity fluctuations.

[0028] In this embodiment, specifically: the inner wall of the protective tube 11 is slidably connected with an anti-detachment block 22, and the lower surface of the anti-detachment block 22 is fixedly connected to the upper end of the slide rod 10; the anti-detachment block 22 can prevent the slide rod 10 from falling off due to the elongation of the spring 9 when the lifting plate 8 rises, and the anti-detachment block 22 can increase the contact area with the pressure sensor 12 and improve the uniformity of force.

[0029] The working principle of the utility model is: the gas is adsorbed by the carbon molecular sieve 5 to separate oxygen and nitrogen, and the nitrogen is discharged upward from the tank body 1 through the through hole 13, and is pressed on the upper sieve plate 3 by the pressure plate 7 to ensure that the carbon molecular sieve 5 is in a compressed state. At this time, the upper end of the anti-stripping block 22 is against the pressure sensor 12, and the pressure at this time is recorded as the standard pressure. When the carbon molecular sieve 5 is loose, the spring 9 makes the pressure plate 7 still against the upper sieve plate 3 through adaptation. When the pressure plate 7 moves downward, it drives the slide bar 10 to move downward. At this time, the pressure sensor 12 detects that the pressure is reduced, and controls the hydraulic rod 6 to push the lifting plate 8 downward. When the spring 9 is compressed and the pressure of the pressure sensor 12 applied by the anti-slip block 22 increases to the standard pressure, the hydraulic rod 6 is stopped from pushing, so that the carbon molecular sieve 5 can always be kept in a compressed state, with a large compression range and able to ensure the applied pressure, and it is not easy for the carbon molecular sieve to be pulverized and the nitrogen to be produced to be impure. When filling is needed, the hydraulic rod 6 is controlled to contract and drive the lifting plate 8 to move into the cover 2, and the bolt 19 is unscrewed to separate the cover 2 from the tank body 1, and the carbon molecular sieve 5 can be filled inwardly. When replacement is needed, the cylinder 17 can be taken out from the tank body 1, and the entire cylinder of carbon molecular sieve 5 can be replaced.

[0030] 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 pressure swing adsorption nitrogen production and compacting device, comprising a tank body (1), characterized in that: The upper surface of the tank body (1) is provided with a cover (2), the upper side of the inner wall of the tank body (1) is provided with an upper sieve plate (3), the lower side of the inner wall of the tank body (1) is provided with a lower sieve plate (4), a carbon molecular sieve (5) is filled between the lower surface of the upper sieve plate (3) and the upper surface of the lower sieve plate (4), a hydraulic rod (6) is installed on the upper surface of the cover (2), a pressing plate (7) is provided on the upper surface of the upper sieve plate (3), a lifting plate (8) is provided on the upper side of the pressing plate (7), and a lower surface of the lifting plate (8) is fixedly connected to the upper surface of the pressing plate (7). The lifting plate (8) is provided with uniformly distributed springs (9), the inner side wall of the lifting plate (8) is slidably connected with uniformly distributed sliding rods (10), the lower end of the sliding rods (10) is fixedly connected to the upper surface of the pressing plate (7), the upper surface of the lifting plate (8) is fixedly connected with uniformly distributed protective tubes (11), a pressure sensor (12) is installed on the upper side of the inner side wall of the protective tube (11), the upper surface of the lifting plate (8) is fixedly connected to the output end of the hydraulic rod (6), and the lifting plate (8) and the inner side wall of the pressing plate (7) are provided with uniformly distributed through holes (13).

2. A pressure swing adsorption nitrogen production and compression device according to claim 1, characterized in that: The lower surface of the tank body (1) is connected to an air inlet pipe (14), and the upper surface of the sealing cover (2) is connected to an air outlet pipe (15).

3. A pressure swing adsorption nitrogen production and compression device according to claim 1, characterized in that: A retaining ring (16) is provided on the lower side of the lower sieve plate (4), and the outer side wall of the retaining ring (16) is fixedly connected to the inner side wall of the tank body (1).

4. A pressure swing adsorption nitrogen production and compression device according to claim 1, characterized in that: The inner wall of the tank body (1) is slidably connected to a cylinder (17), the outer wall of the lower sieve plate (4) is fixedly connected to the inner wall of the cylinder (17), and the outer wall of the upper sieve plate (3) is slidably connected to the inner wall of the cylinder (17).

5. The pressure swing adsorption nitrogen production and compression device according to claim 1, characterized in that: The outer wall of the tank body (1) and the outer wall of the cover (2) are both fixedly connected with a connecting flange (18), the inner wall of the connecting flange (18) is provided with evenly distributed bolts (19), and the outer wall of the bolt (19) is threadedly connected with a nut (20).

6. A pressure swing adsorption nitrogen production and compression device according to claim 1, characterized in that: A pair of blocking sheets (21) are fixedly connected to the inner side wall of the through hole (13).

7. The pressure swing adsorption nitrogen production and compression device according to claim 1, characterized in that: An anti-slip block (22) is slidably connected to the inner side wall of the protective tube (11), and the lower surface of the anti-slip block (22) is fixedly connected to the upper end of the sliding rod (10).

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