Uniform compression anti-pulverization device for pressure swing adsorption nitrogen-making molecular sieve

Abstract

The utility model discloses a uniform compression anti-pulverization device for a pressure swing adsorption nitrogen-making molecular sieve. The uniform compression anti-pulverization device comprises an end socket, the filtering assembly is arranged at the top of the sealing head and is used for collecting and filtering nitrogen; and the pressing assembly is arranged at the top of the filtering assembly and is used for applying pressing force to the filtering assembly to prevent the molecular sieve from being pulverized. The device comprises a sealing head, a filtering assembly and a pressing assembly, the filtering assembly is installed at the top of the sealing head, the pressing assembly is installed at the top of the filtering assembly, the filtering assembly can be pressed on the top face of a molecular sieve through the pressing assembly, uniform pressing force is always applied to the molecular sieve during pressure swing adsorption, and when air adsorbed by the molecular sieve is dissolved, the molecular sieve is not prone to falling off. Therefore, the service life of the molecular sieve is prolonged, the nitrogen production quality is improved, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery, and particularly relates to a pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device. Background Art

[0002] In the process of distinguishing oxygen and nitrogen by a pressure swing adsorption nitrogen generator, it is carried out by the difference in the adsorption rates of the two. In a very short time, oxygen has been fully adsorbed, while nitrogen has not had time to be adsorbed, and the adsorption process is stopped. Therefore, pressure swing adsorption nitrogen production requires a pressure change. The product characteristics of a pressure swing adsorption nitrogen generator also need to control the time within one minute.

[0003] However, pressure swing adsorption nitrogen production precisely utilizes the selective adsorption characteristics of carbon molecular sieves, adopts a cycle of pressurized adsorption and depressurized desorption, and makes compressed air alternately enter the adsorption tower to achieve air separation, so as to continuously produce high-purity product nitrogen. During the nitrogen production process, there is a fluctuation in the bottom blowing pressure of the nitrogen production device. If the molecular sieve cannot be tightly pressed by the pressing device in time to adapt to the pressure change, the material level of the molecular sieve will change due to being blown, and it is easy to produce a surge phenomenon due to the pressure change of pressure swing adsorption, resulting in the pulverization of the molecular sieve, affecting the nitrogen production efficiency, reducing the nitrogen purity, and shortening the service life of the molecular sieve powder. Summary of the Utility Model

[0004] The utility model provides a pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device to solve the above technical problems.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions to be realized:

[0006] A pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device, comprising:

[0007] A head;

[0008] A filtering component, arranged on the top of the head, for collecting and filtering nitrogen;

[0009] A pressing component, arranged on the top of the filtering component, for applying a pressing force to the filtering component to prevent the molecular sieve from pulverizing.

[0010] Further, the pressing component includes a molecular sieve pressing plate, the molecular sieve pressing plate is arranged on the top of the filtering component, and a cylinder is installed on the top of the molecular sieve pressing plate;

[0011] The cylinder is provided with a joint and an electronic sensor, the joint is connected with a normally open solenoid valve through a pilot check valve, and the normally open solenoid valve is provided with a tee and a compressed air inlet pipe.

[0012] Further, the molecular sieve pressing plate is connected to the cylinder through a lock nut.

[0013] Further, the tee joint is of a T-shaped structure.

[0014] Further, the cylinder is a standard cylinder with a magnetic ring.

[0015] Further, the filtration assembly includes a nitrogen gas collection chamber. The molecular sieve pressing plate is arranged at the top of the nitrogen gas collection chamber. In the nitrogen gas collection chamber, a nitrogen production coconut mat, a first nitrogen gas collection and flow-through orifice plate, and a second nitrogen gas collection and flow-through orifice plate are successively arranged from top to bottom;

[0016] Wherein, the nitrogen production coconut mat is located in the middle of the nitrogen gas collection chamber. The first nitrogen gas collection and flow-through orifice plate and the second nitrogen gas collection and flow-through orifice plate are arranged at one end of the nitrogen gas collection chamber close to the head. A nitrogen gas separation stainless steel wire mesh is arranged between the first nitrogen gas collection and flow-through orifice plate and the second nitrogen gas collection and flow-through orifice plate.

[0017] Further, a nitrogen gas collection connection pipe is arranged outside the nitrogen gas collection chamber. One end of the nitrogen gas collection connection pipe is outside the nitrogen gas collection chamber, and the other end extends into the nitrogen gas collection chamber and is located below the nitrogen production coconut mat.

[0018] Further, the first nitrogen gas collection and flow-through orifice plate and the second nitrogen gas collection and flow-through orifice plate have the same structure.

[0019] Further, the head is of a conical structure.

[0020] Further, the head is connected to the filtration assembly through screws.

[0021] Compared with the prior art, the present utility model has the following beneficial effects:

[0022] 1. The device includes a head, a filtration assembly, and a pressing assembly. Among them, the filtration assembly is installed on the top of the head, and the pressing assembly is installed on the top of the filtration assembly. The filtration assembly can be pressed against the top surface of the molecular sieve by using the pressing assembly. During pressure swing adsorption, there is always a uniform pressing force on the molecular sieve, which resolves the risk that the molecular sieve is pulverized when impacted by the inner wall surface of the cone due to adsorbed air, prolongs the service life of the molecular sieve, improves the nitrogen production quality, and improves the economic benefits.

[0023] 2. The molecular sieve pressing plate is driven by a cylinder, and the pressing action can be realized quickly and accurately. This mechanical pressing method is more stable and reliable than traditional manual or mechanical pressing, and greatly improves the work efficiency at the same time; the electronic sensor can monitor the pressing state in real time and feed back the information to the control system. The solenoid valve controls the action of the cylinder according to the instructions of the control system, thereby realizing an automated pressing process, reducing the complexity of manual operation, and improving the working accuracy and stability.

[0024] 3. The locking nut can be tightened or loosened by simple rotation, making the connection between the molecular sieve pressing plate and the cylinder easy to adjust. When it is necessary to replace or repair the molecular sieve pressing plate or the cylinder, it can be quickly disassembled by loosening the locking nut, improving the convenience of maintenance.

[0025] 4. The structure of the T-shaped three-way is simple and clear. When installing, only need to connect the pipeline to the corresponding interface, without complex tools or steps.

[0026] 5. Using a cylinder with a magnetic ring can achieve fast and accurate position control, with a faster response speed.

[0027] 6. The fine mesh structure of the nitrogen separation stainless steel wire mesh can further separate nitrogen, improving the purity of nitrogen.

[0028] 7. By setting the first nitrogen collection and circulation orifice plate and the second nitrogen collection and circulation orifice plate, combined with the nitrogen separation stainless steel wire mesh, a multi-layer filtration structure is formed, which can filter and separate gases layer by layer, improving the filtration effect and the purity of nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of the overall pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device provided by the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the pressing assembly in the pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device provided by the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the filtration assembly in the pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device provided by the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the head in the pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device provided by the present invention;

[0034] Wherein: 1. Connector; 2. Inducing check valve; 3. Solenoid valve; 4. Electronic sensor; 5. Molecular sieve pressing plate; 6. Locking nut; 7. Cylinder; 8. Three-way joint; 9. Compressed air inlet pipe; 10. Nitrogen collecting cavity; 11. Nitrogen production coconut gasket; 12. Nitrogen collecting connecting pipe; 13. First nitrogen collection and flow orifice plate; 14. Nitrogen separation stainless steel wire mesh; 15. Second nitrogen collection and flow orifice plate; 16. Fixing screw; 17. Head. Detailed implementation mode

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0037] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0039] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0040] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected", "linked" are used, they 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] The following will describe this embodiment in detail with reference to the accompanying drawings.

[0042] As Figures 1-4 shown, this embodiment provides a pressure swing adsorption nitrogen production molecular sieve uniform pressing and anti-pulverization device, including: a head 17, which is a conical structure; a filtering component, arranged on the top of the head 17, used for collecting and filtering the nitrogen in the tank; a pressing component, arranged on the top of the filtering component, used for applying a pressing force to the filtering component to prevent the molecular sieve from pulverizing. This device includes a head 17, a filtering component and a pressing component. Among them, the filtering component is installed on the top of the head 17, and the pressing component is installed on the top of the filtering component. The pressing component can press the filtering component against the top surface of the molecular sieve, and there is always a uniform pressing force on the molecular sieve during pressure swing adsorption, resolving the risk that the molecular sieve is pulverized when being impacted by the adsorbed air against the inner wall surface of the conical head 17, extending the service life of the molecular sieve, improving the nitrogen production quality, and increasing the economic benefits. As Figure 2 shown, the pressing component includes a molecular sieve pressing plate 5, the molecular sieve pressing plate 5 is arranged on the top of the filtering component, and a cylinder 7 is installed on the top of the molecular sieve pressing plate 5; a joint 1 and an electronic sensor 4 are arranged on the cylinder 7, the joint 1 is connected with a normally open solenoid valve 3 through a pilot check valve 2, and a tee 8 and a compressed air inlet pipe 9 are arranged on the normally open solenoid valve 3. The molecular sieve pressing plate 5 is driven by the cylinder 7, and can realize the pressing action quickly and accurately, which is more stable and reliable than the traditional manual or mechanical pressing, and greatly improves the working efficiency at the same time; the electronic sensor 4 can monitor the pressing state in real time and feedback the information to the control system. The normally open solenoid valve 3 controls the action of the cylinder 7 according to the instructions of the control system, thus realizing an automatic pressing process, reducing the complexity of manual operation, and improving the working accuracy and stability.

[0043] In this embodiment, the molecular sieve pressing plate 5 is connected to the cylinder 7 through a lock nut 6.

[0044] In this embodiment, the tee 8 is a T-shaped structure.

[0045] In this embodiment, the cylinder 7 is a standard cylinder with a magnetic ring.

[0046] In this embodiment, as Figure 3As shown in the figure, the filtering component includes a nitrogen gas collecting chamber 10. A molecular sieve pressing plate 5 is arranged at the top of the nitrogen gas collecting chamber 10. Inside the nitrogen gas collecting chamber 10, a nitrogen-producing coconut mat 11, a first nitrogen gas collecting and flowing through orifice plate 13, and a second nitrogen gas collecting and flowing through orifice plate 15 are successively arranged from top to bottom. Among them, the nitrogen-producing coconut mat 11 is located in the middle of the nitrogen gas collecting chamber 10. The first nitrogen gas collecting and flowing through orifice plate 13 and the second nitrogen gas collecting and flowing through orifice plate 15 are arranged at one end of the nitrogen gas collecting chamber 10 close to the head 17. A nitrogen gas separating stainless steel wire mesh 14 is arranged between the first nitrogen gas collecting and flowing through orifice plate 13 and the second nitrogen gas collecting and flowing through orifice plate 15. A nitrogen gas collecting connecting pipe 12 is arranged outside the nitrogen gas collecting chamber 10. One end of the nitrogen gas collecting connecting pipe 12 is outside the nitrogen gas collecting chamber 10, and the other end extends into the nitrogen gas collecting chamber 10 and is located below the nitrogen-producing coconut mat 11.

[0047] In this embodiment, the first nitrogen gas collecting and flowing through orifice plate 13 and the second nitrogen gas collecting and flowing through orifice plate 15 have the same structure and are connected to the nitrogen gas collecting chamber 10 through fixing screws 16.

[0048] In this embodiment, the head 17 is of a conical structure.

[0049] In this embodiment, the head 17 is connected to the filtering component through screws.

[0050] During the operation of this device, during pressure swing adsorption for nitrogen production, the molecular sieve in the tank compresses the air at the bottom. The air flows upward from the bottom of the molecular sieve to the upper part of the tank. The cylinder 7 applies force to the surface of the molecular sieve through the molecular sieve pressing plate 5, evenly pressing on the molecular sieve in the tank body. The air circuit of the cylinder 7 adopts an induced check valve 2 to ensure the stable pressure of the cylinder 7, that is, the stable pressure on the surface of the molecular sieve. At the top of the adsorption tower, a CHA30° design is adopted for the reasonable cone angle of the pressure vessel, which is coordinated with the angle of repose of the molecular sieve in the lower part, so that the pressing force of the molecular sieve pressing plate 5 is evenly applied to the upper part of the molecular sieve particles. The pressure applied to the upper part of the molecular sieve particles is always greater than the impact force of the air at the bottom of the tank on the molecular sieve during pressure swing adsorption, preventing the impact and collision between the molecular sieve particles and the inner wall surface of the conical head 17, and thus preventing the wear and pulverization of the molecular sieve. At the top of the adsorption tower, the nitrogen gas collecting chamber 10 is designed with a partitioned cylinder structure. A double-layer annular nitrogen gas flow-through orifice plate structure is arranged at the bottom of the double cylinders. An 80-mesh stainless steel wire mesh is laid between the two orifice plates to collect and filter the nitrogen gas entering the chamber, making the collected nitrogen gas meet the standard requirements. A connecting pipe is arranged in the middle of the chamber to flow out the nitrogen gas.

[0051] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pressure swing adsorption nitrogen production molecular sieve uniform compression and anti-powdering device, characterized in that: include: Header (17); A filter assembly, arranged at the top of the sealing head (17), for collecting and filtering nitrogen; A pressing component, arranged on the top of the filter component, for applying a pressing force to the filter component to prevent the molecular sieve from pulverizing; The compression assembly comprises a molecular sieve compression plate (5), the molecular sieve compression plate (5) being arranged on the top of the filter assembly, and a cylinder (7) being installed on the top of the molecular sieve compression plate (5); The cylinder (7) is provided with a joint (1) and an electronic sensor (4); the joint (1) is connected to a solenoid valve (3) via an induction check valve (2); the solenoid valve (3) is provided with a three-way connection (8) and a compressed air intake pipe (9).

2. The device according to claim 1, characterized in that The molecular sieve pressing plate (5) is connected to the cylinder (7) via a locking nut (6).

3. The device according to claim 1, characterized in that The tee (8) is a T-shaped structure.

4. The device according to claim 2, characterized in that The cylinder (7) is a standard cylinder with a magnetic ring.

5. The device according to claim 1, characterized in that The filter assembly comprises a nitrogen collection chamber (10), the molecular sieve compression plate (5) is arranged on the top of the nitrogen collection chamber (10), and the nitrogen collection chamber (10) is provided with a nitrogen-generating coconut mat (11), a first nitrogen collection flow orifice plate (13) and a second nitrogen collection flow orifice plate (15) in order from top to bottom; The nitrogen-generating coconut mat (11) is located in the middle of the nitrogen collection chamber (10), the first nitrogen collection and circulation orifice plate (13) and the second nitrogen collection and circulation orifice plate (15) are arranged at one end of the nitrogen collection chamber (10) close to the sealing head (17), and a nitrogen separation stainless steel wire mesh (14) is arranged between the first nitrogen collection and circulation orifice plate (13) and the second nitrogen collection and circulation orifice plate (15).

6. The device according to claim 5, characterized in that A nitrogen collecting pipe (12) is provided outside the nitrogen collecting chamber (10); one end of the nitrogen collecting pipe (12) is located outside the nitrogen collecting chamber (10), and the other end extends into the nitrogen collecting chamber (10) and is located below the nitrogen-generating coconut mat (11).

7. The device according to claim 5, characterized in that The first nitrogen gas collecting and circulating orifice plate (13) and the second nitrogen gas collecting and circulating orifice plate (15) have the same structure.

8. The device according to claim 1, characterized in that The sealing head (17) is a conical structure.

9. The device according to claim 1, characterized in that The sealing head (17) is connected to the filter assembly via screws.

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