High-purity pressure swing adsorption nitrogen making equipment based on high-performance compressor

Abstract

The utility model discloses high-purity pressure swing adsorption nitrogen making equipment based on a high-performance compressor, which relates to the technical field of nitrogen making equipment and comprises an air compressor, an adsorption tank, an air outlet mechanism, a collecting mechanism and a discharging mechanism. The adsorption tank is provided with a first adsorption chamber, a connecting channel and a second adsorption chamber; the air outlet mechanism comprises a mounting disc, and an annular air outlet groove is formed in the upper end of the mounting disc; the collecting mechanism is arranged at the top of the second adsorption chamber in the adsorption tank, and through the connecting channel arranged between the first adsorption chamber and the second adsorption chamber, high-pressure air can be conveyed to the second adsorption chamber again for secondary adsorption after passing through the first adsorption chamber for adsorption; the adsorption path can be prolonged without lengthening the length of the adsorption tank, so that the contact time of the molecular sieve and air is prolonged, the adsorption effect is improved, and the purity of nitrogen is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of nitrogen generation equipment, specifically a high-purity pressure swing adsorption nitrogen generation device based on a high-performance compressor. Background Technology

[0002] Pressure swing adsorption (PSA) nitrogen production is a technology that uses an adsorbent (such as a molecular sieve) to selectively adsorb and separate gas components under pressure changes. High-pressure air compressed by a compressor enters from one end of the tower. Due to the high pressure, oxygen in the air is adsorbed by the molecular sieve, while nitrogen passes through the molecular sieve bed and continues to flow.

[0003] In existing adsorption equipment, high-pressure air enters from the bottom of the tank and is evenly distributed through the molecular sieve in the middle of the tank by an airflow distributor to adsorb nitrogen. To improve the purity of nitrogen, the contact time between high-pressure air and molecular sieve needs to be increased. However, the contact time between high-pressure air and molecular sieve is related to the thickness of molecular sieve. If the number of molecular sieve layers or the thickness are directly increased, the tank needs to be lengthened to increase the adsorption path. Lengthening the tank will lead to higher equipment and molecular sieve costs and make maintenance and repair inconvenient. Utility Model Content

[0004] This invention provides a high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor. It has the advantage of increasing the adsorption path without extending the tank body, thereby improving the nitrogen purity. This solves the problem of existing adsorption tanks having short adsorption paths, and the tank body also increasing in length after extension, making maintenance and repair difficult.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor, comprising an air compressor and an adsorption tank, and further comprising an exhaust mechanism, a collection mechanism, and a discharge mechanism, wherein:

[0006] The adsorption tank is provided with a first adsorption chamber, a connecting channel and a second adsorption chamber from the outside to the inside. Both the first adsorption chamber and the second adsorption chamber are connected to the connecting channel. Both the first adsorption chamber and the second adsorption chamber are filled with molecular sieves.

[0007] The air outlet mechanism includes an installation plate installed inside the adsorption tank at the bottom of the first adsorption chamber. The upper end of the installation plate is provided with an annular air outlet groove corresponding to the first adsorption chamber. The air compressor is connected to the installation plate through an air inlet pipe.

[0008] The collection mechanism is located at the top of the second adsorption chamber inside the adsorption tank and is used to collect nitrogen gas passing through the second adsorption chamber.

[0009] As a preferred embodiment of the present invention, the first adsorption chamber is annular, and a first connection port is provided between the top of the first adsorption chamber and the connecting channel. The connecting channel is annular, and a second connection port is provided between the bottom of the connecting channel and the second adsorption chamber.

[0010] As a preferred technical solution of this utility model, a base frame is installed at the bottom of the first adsorption chamber, the base frame is located above and corresponds to the annular air outlet groove, and a receiving wire mesh is installed on the top of the base frame.

[0011] As a preferred embodiment of the present invention, the collection mechanism includes an installation plate installed on the top of the second adsorption chamber, a collection cylinder corresponding to the second adsorption chamber installed in the middle of the installation plate, and a nitrogen transport pipe extending to the outside of the adsorption tank installed at the upper end of the collection cylinder.

[0012] As a preferred embodiment of the present invention, the air outlet mechanism further includes a plurality of air nozzles installed in an annular air outlet groove, wherein the air nozzles are evenly arranged in a ring shape in the annular air outlet groove and correspond to the first adsorption chamber.

[0013] As a preferred embodiment of the present invention, the discharge mechanism includes a discharge hopper installed at the bottom of the second adsorption chamber, a second discharge pipe installed at the bottom of the discharge hopper, the second discharge pipe extending to the outside of the bottom of the adsorption tank, and a switch valve with a valve located at the side end of the adsorption tank installed at the top of the second discharge pipe.

[0014] As a preferred embodiment of the present invention, a first discharge pipe with a valve is installed at the bottom side of the adsorption tank and extends into the first adsorption chamber, and a feed pipe with a cap is installed at the top side of the adsorption tank, passing through the first adsorption chamber and extending into the second adsorption chamber.

[0015] Compared with the prior art, this utility model provides a high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor, which has the following beneficial effects:

[0016] This invention, through a connecting channel between the first and second adsorption chambers, allows high-pressure air to pass through the first adsorption chamber for adsorption and then be transported to the second adsorption chamber for secondary adsorption. This extends the adsorption path without lengthening the adsorption tank, thus increasing the contact time between the molecular sieve and the air, improving the adsorption effect, and increasing the purity of nitrogen. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the tank body of this utility model;

[0020] Figure 4 This is a schematic diagram of the first adsorption chamber structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the base frame structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the air outlet mechanism of this utility model.

[0023] In the diagram: 1. Air compressor; 2. Adsorption tank; 21. First adsorption chamber; 211. First connection port; 22. Connection channel; 23. Second adsorption chamber; 231. Second connection port; 24. Feed pipe; 25. First discharge pipe; 26. Base frame; 261. Wire mesh receiving device; 3. Collection mechanism; 31. Collection cylinder; 32. Mounting plate; 4. Air outlet mechanism; 41. Mounting plate; 411. Annular air outlet groove; 42. Air nozzle; 43. Air inlet pipe; 5. Discharge mechanism; 51. Switch valve; 52. Discharge hopper; 53. Second discharge pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0025] Please see Figures 1-6 This utility model discloses a high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor, including an air compressor 1 and an adsorption tank 2, as well as an exhaust mechanism 4, a collection mechanism 3 and an discharge mechanism 5, wherein:

[0026] The adsorption tank 2 is provided with a first adsorption chamber 21, a connecting channel 22 and a second adsorption chamber 23 from the outside to the inside. Both the first adsorption chamber 21 and the second adsorption chamber 23 are connected to the connecting channel 22. Both the first adsorption chamber 21 and the second adsorption chamber 23 are filled with molecular sieves.

[0027] The air outlet mechanism 4 includes a mounting plate 41 installed in the adsorption tank 2 at the bottom of the first adsorption chamber 21. The upper end of the mounting plate 41 is provided with an annular air outlet groove 411 corresponding to the first adsorption chamber 21. The air compressor 1 is connected to the mounting plate 41 through the air inlet pipe 43.

[0028] The collection mechanism 3 is located at the top of the second adsorption chamber 23 inside the adsorption tank 2, and is used to collect nitrogen gas passing through the second adsorption chamber 23.

[0029] Please refer to the appendix. Figure 2 , Figure 3 , Figure 4 The first adsorption chamber 21 is annular, and a first connection port 211 is provided between the top of the first adsorption chamber 21 and the connecting channel 22. The connecting channel 22 is annular, and a second connection port 231 is provided between the bottom of the connecting channel 22 and the second adsorption chamber 23.

[0030] Specifically, when the high-pressure air in the first adsorption chamber 21 flows to the top of the first adsorption chamber 21, it passes through the first connection port 211 and enters the connection channel 22. When the high-pressure air flows to the bottom of the connection channel 22, it passes through the second connection port 231 and enters the second adsorption chamber 23 from the bottom.

[0031] Please refer to the appendix. Figure 5 A base frame 26 is installed at the bottom of the first adsorption chamber 21. The base frame 26 is located above and corresponds to the annular air outlet groove 411. A receiving wire mesh 261 is installed on the top of the base frame 26.

[0032] Specifically, the receiving wire mesh 261 can receive the molecular sieve in the first adsorption chamber 21 without affecting the entry of high-pressure air into the first adsorption chamber 21.

[0033] Please refer to the appendix. Figure 3 The collection mechanism 3 includes a mounting plate 32 installed on the top of the second adsorption chamber 23. A collection cylinder 31 corresponding to the second adsorption chamber 23 is installed in the middle of the mounting plate 32. A nitrogen transport pipe extending to the body of the adsorption tank 2 is installed at the upper end of the collection cylinder 31.

[0034] Specifically, after secondary adsorption in the second adsorption chamber 23, the remaining nitrogen flows to the upper end of the second adsorption chamber 23 and enters the collection cylinder 31. Finally, it is discharged from the adsorption tank 2 through the nitrogen delivery pipe and transported to the collection device.

[0035] Please refer to the appendix. Figure 6 The air outlet mechanism 4 also includes a plurality of air nozzles 42 installed in the annular air outlet groove 411. The air nozzles 42 are evenly arranged in a ring shape in the annular air outlet groove 411 and correspond to the first adsorption chamber 21.

[0036] Specifically, the annular exhaust nozzle 42 corresponds to the annular first adsorption chamber 21, which allows high-pressure air to enter the first adsorption chamber 21 evenly for adsorption. Example 2

[0037] Based on the above embodiment 1, please refer to the appendix. Figure 1 , Figure 3 The discharge mechanism 5 includes a discharge hopper 52 installed at the bottom of the second adsorption chamber 23. A second discharge pipe 53 is installed at the bottom of the discharge hopper 52. The second discharge pipe 53 extends to the outside of the bottom of the adsorption tank 2. A switch valve 51 with a valve located at the side end of the adsorption tank 2 is installed at the top of the second discharge pipe 53.

[0038] Furthermore, a first discharge pipe 25 with a valve is installed at the bottom side of the adsorption tank 2, extending into the first adsorption chamber 21, and a feed pipe 24 with a cap is installed at the top side of the adsorption tank 2, passing through the first adsorption chamber 21 and extending into the second adsorption chamber 23.

[0039] It should be noted that the cap of the feed pipe 24 is installed at the opening of the feed pipe 24 by means of threaded connection. The end of the feed pipe 24 is connected to the second adsorption chamber 23. The bottom of the middle part of the feed pipe 24 has an opening that is connected to the first adsorption chamber 21. The molecular sieve in the first adsorption chamber 21 will be filled before the molecular sieve in the second adsorption chamber 23 will begin to be filled.

[0040] In this embodiment, opening the valve on the first discharge pipe 25 and the switch valve 51 on the second discharge pipe 53 allows the molecular sieves in the first adsorption chamber 21 and the second adsorption chamber 23 to be discharged. After the molecular sieves are discharged, the cap on the feed pipe 24 is opened, and then new molecular sieves are added to the first adsorption chamber 21 and the second adsorption chamber 23 through the feed pipe 24.

[0041] The working principle and usage process of this utility model: After the air is compressed by the air compressor 1, it forms high-pressure air. The high-pressure air enters the adsorption tank 2 through the air inlet pipe 43. Then, the high-pressure air is sprayed upward from the jet nozzle 42. The annularly arranged jet nozzle 42 sprays the high-pressure air upward in an annular pattern, passes through the receiving wire mesh 261 and enters the first adsorption chamber 21. The high-pressure air flows upward in the first adsorption chamber 21. The molecular sieve in the first adsorption chamber 21 adsorbs impurities such as oxygen in the air. When the high-pressure air flows to the top of the first adsorption chamber 21, it passes through the first connection port 211 and enters the connection channel 22.

[0042] After high-pressure air enters the connecting channel 22, it flows from top to bottom along the connecting channel 22. When the high-pressure air reaches the bottom of the connecting channel 22, it passes through the second connecting port 231 and enters the second adsorption chamber 23 from the bottom of the second adsorption chamber 23.

[0043] After high-pressure air enters the second adsorption chamber 23, it flows upward from the bottom of the second adsorption chamber 23. At this time, the molecular sieve in the second adsorption chamber 23 performs secondary adsorption on the air, while the nitrogen gas continues to flow unaffected. After secondary adsorption in the second adsorption chamber 23, the remaining nitrogen gas flows to the upper end of the second adsorption chamber 23 and enters the collection cylinder 31. Finally, it is discharged from the adsorption tank 2 through the nitrogen gas delivery pipe and transported to the collection device.

Claims

1. A high-purity pressure swing adsorption (PSA) nitrogen generator based on a high-performance compressor, comprising an air compressor (1) and an adsorption tank (2), characterized in that, It also includes an exhaust mechanism (4), a collection mechanism (3), and an exhaust mechanism (5), wherein: The adsorption tank (2) is provided with a first adsorption chamber (21), a connecting channel (22) and a second adsorption chamber (23) from the outside to the inside. The first adsorption chamber (21) and the second adsorption chamber (23) are both connected to the connecting channel (22). The first adsorption chamber (21) and the second adsorption chamber (23) are both filled with molecular sieves. The air outlet mechanism (4) includes an installation plate (41) installed in the adsorption tank (2) at the bottom of the first adsorption chamber (21). The upper end of the installation plate (41) is provided with an annular air outlet groove (411) corresponding to the first adsorption chamber (21). The air compressor (1) is connected to the installation plate (41) through an air inlet pipe (43). The collection mechanism (3) is located at the top of the second adsorption chamber (23) inside the adsorption tank (2) and is used to collect nitrogen gas passing through the second adsorption chamber (23).

2. The high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor according to claim 1, characterized in that: The first adsorption chamber (21) is annular, and a first connection port (211) is provided between the top of the first adsorption chamber (21) and the connecting channel (22). The connecting channel (22) is annular, and a second connection port (231) is provided between the bottom of the connecting channel (22) and the second adsorption chamber (23).

3. The high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor according to claim 2, characterized in that: A base frame (26) is installed at the bottom of the first adsorption chamber (21). The base frame (26) is located above and corresponds to the annular gas outlet groove (411). A receiving wire mesh (261) is installed on the top of the base frame (26).

4. The high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor according to claim 3, characterized in that: The collection mechanism (3) includes a mounting plate (32) installed on the top of the second adsorption chamber (23), a collection cylinder (31) corresponding to the second adsorption chamber (23) is installed in the middle of the mounting plate (32), and a nitrogen transport pipe extending to the body of the adsorption tank (2) is installed at the upper end of the collection cylinder (31).

5. The high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor according to claim 1, characterized in that: The air outlet mechanism (4) also includes a plurality of air nozzles (42) installed in the annular air outlet groove (411). The air nozzles (42) are evenly arranged in a ring shape in the annular air outlet groove (411) and correspond to the first adsorption chamber (21).

6. The high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor according to claim 1, characterized in that: The discharge mechanism (5) includes a discharge hopper (52) installed at the bottom of the second adsorption chamber (23), a second discharge pipe (53) installed at the bottom of the discharge hopper (52), the second discharge pipe (53) extending to the outside of the bottom of the adsorption tank (2), and a switch valve (51) with the valve located at the side end of the adsorption tank (2) installed at the top of the second discharge pipe (53).

7. A high-purity pressure swing adsorption nitrogen generator based on a high-performance compressor according to claim 6, characterized in that: The bottom side of the adsorption tank (2) is equipped with a first discharge pipe (25) with a valve extending into the first adsorption chamber (21), and the top side of the adsorption tank (2) is equipped with a feed pipe (24) with a cap that passes through the first adsorption chamber (21) and extends into the second adsorption chamber (23).

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