Horizontal molecular sieve adsorber for purifying gas containing multiple components

Abstract

The utility model relates to the technical field of air separation, in particular to a horizontal molecular sieve adsorber for purifying gas containing multiple components, which comprises a shell and a separation component, and a gas outlet pipeline and a gas inlet pipeline are respectively arranged at the upper end and the lower end of the shell; one end of the gas outlet pipeline is located outside the shell, the other end of the gas outlet pipeline penetrates through the shell and is provided with a top gas distributor, and one end of the gas inlet pipeline is located outside the shell and the other end of the gas inlet pipeline penetrates through the shell and is provided with a bottom gas distributor; the separation assembly is located in the shell and comprises a layer bed, an aluminum oxide layer, a molecular sieve layer and a nitrous oxide adsorption layer, the layer bed is located above the bottom gas distributor, a first gas flow distribution device is arranged between the aluminum oxide layer and the molecular sieve layer, and a second gas flow distribution device is arranged between the molecular sieve layer and the nitrous oxide adsorption layer; the nitrous oxide adsorption device disclosed by the utility model can be used for adsorbing nitrous oxide in air separation, so that the problems caused by low nitrous oxide adsorption rate are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air separation, in particular to a horizontal molecular sieve adsorber for purifying multi-component gas. Background Art

[0002] Molecular sieve adsorbers are used to adsorb water, carbon dioxide and hydrocarbons in the air.

[0003] The existing molecular sieve adsorber can basically achieve full adsorption of water, and the carbon dioxide adsorption is ≤1ppm. However, the adsorption rate of nitrous oxide is only 60%-80%. The presence of nitrous oxide can cause pipeline or main heat exchanger blockage in air separation, accumulation in the main cooler causing main cooler explosion, and impurities exceeding the standard when producing high-purity gas or ultra-high-purity semiconductor gas. Summary of the invention

[0004] In order to solve the problems that the adsorption rate of nitrous oxide by the existing molecular sieve adsorber is only 60%-80%, thereby causing blockage of pipelines or main heat exchangers, explosion of main coolers due to accumulation in main coolers, and impurities exceeding the standard when producing high-purity gases or ultra-high-purity semiconductor gases, the utility model proposes a horizontal molecular sieve adsorber for purifying multi-component gases, which can adsorb nitrous oxide in air separation and effectively avoid the problems caused by the low adsorption rate of nitrous oxide.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A horizontal molecular sieve adsorber for purifying multi-component gas comprises a shell and a separation component, wherein an air outlet pipeline and an air inlet pipeline are respectively arranged at the upper and lower ends of the shell.

[0007] One end of the air outlet pipe is located outside the shell, and the other end of the air outlet pipe is provided with a top gas distributor after passing through the shell. One end of the air inlet pipe is located outside the shell, and the other end of the air inlet pipe is provided with a bottom gas distributor after passing through the shell.

[0008] The separation component is located inside the shell, and includes a layer bed, an aluminum oxide layer, a molecular sieve layer and a nitrous oxide adsorption layer. The layer bed is located above the bottom gas distributor, the aluminum oxide layer is located above the layer bed, the molecular sieve layer is located above the aluminum oxide layer, and the nitrous oxide adsorption layer is located above the molecular sieve layer.

[0009] An airflow distribution device 1 is arranged between the aluminum oxide layer and the molecular sieve layer, an airflow distribution device 2 is arranged between the molecular sieve layer and the nitrous oxide adsorption layer, and an airflow distribution device 3 is arranged above the nitrous oxide adsorption layer.

[0010] Furthermore, the filling height of the alumina layer is between 300-600 mm, the filling height of the molecular sieve layer is between 800-1100 mm, and the filling height of the nitrous oxide adsorption layer is between 50-100 mm.

[0011] Furthermore, the shell is provided with gas outlet 1, gas outlet 2 and gas outlet 3, gas outlet 1 is located on the side of the bottom gas distributor, gas outlet 2 is located on the side of the molecular sieve layer, and gas outlet 3 is located on the side of the top gas distributor.

[0012] Furthermore, the bottom gas distributor and the top gas distributor have the same structure, the bottom gas distributor comprises a hole tube and a wire mesh, a plurality of ventilation holes are opened on the outside of the hole tube, and the wire mesh is arranged on the outside of the hole tube.

[0013] Furthermore, a support rod is provided at the lower side of the bed, and the support rod is provided in plurality, and the plurality of support rods jointly support the bed, and the support rod is connected to the shell.

[0014] Furthermore, the air flow distribution device 1 and the air flow distribution device 3 have the same structure, the air flow distribution device 1 includes a orifice plate 1 and a wire mesh 2, the wire mesh 2 is fixed above the orifice plate 1, and the wire mesh 2 is a 40-mesh stainless steel wire mesh, and the air flow distribution device 2 includes a orifice plate 2 and a wire mesh 3, the wire mesh 3 is fixed above the orifice plate 2, and the wire mesh 3 is an 80-mesh stainless steel wire mesh.

[0015] Furthermore, the air inlet pipe and the air outlet pipe are both provided in plurality.

[0016] Through the above technical solution, the beneficial effects of the utility model are:

[0017] The utility model can adsorb nitrous oxide in the air by arranging a nitrous oxide adsorption layer, and the filling height of the nitrous oxide adsorption layer is between 50-100 mm, so that the nitrous oxide adsorption rate is ≥95%, which can effectively avoid the problems caused by the low nitrous oxide adsorption rate.

[0018] The utility model can evenly distribute the air inside the separation component by setting a bottom gas distributor, thereby improving the separation efficiency of the separation component, and can evenly distribute the gas inside the separation component in each separation layer by setting an airflow distribution device one, an airflow distribution device two and an airflow distribution device three. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front cross-sectional schematic diagram of a horizontal molecular sieve adsorber for purifying multi-component gas of the utility model;

[0020] Figure 2The utility model is a horizontal molecular sieve adsorber for purifying multi-component gas. Figure 1 The enlarged schematic diagram of point A in the middle;

[0021] Figure 3 It is a left side cross-sectional schematic diagram of a horizontal molecular sieve adsorber for purifying multi-component gas of the utility model;

[0022] Figure 4 The utility model is a schematic diagram of a top gas distributor in a horizontal molecular sieve adsorber for purifying multi-component gas.

[0023] The reference numerals in the accompanying drawings are:

[0024] 1 is a shell, 2 is an air outlet pipe, 3 is an air inlet pipe, 4 is a top gas distributor, 5 is a bottom gas distributor, 501 is a perforated cylinder, 502 is a wire mesh 1, 6 is a layer bed, 7 is an alumina layer, 8 is a molecular sieve layer, 9 is a nitrous oxide adsorption layer, 10 is an air flow distribution device 1, 11 is an air flow distribution device 2, 12 is an air flow distribution device 3, 13 is an air outlet 1, 14 is an air outlet 2, 15 is an air outlet 3, and 16 is a support rod. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0026] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "horizontal", "vertical" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] Embodiment 1

[0028] like Figure 1 to Figure 4 As shown,

[0029] A horizontal molecular sieve adsorber for purifying multi-component gas comprises a shell 1 and a separation assembly. An air outlet pipe 2 and an air inlet pipe 3 are respectively arranged at the upper and lower ends of the shell 1.

[0030] One end of the air outlet pipe 2 is located outside the shell 1, and the other end of the air outlet pipe 2 passes through the shell 1 and is provided with a top gas distributor 4. One end of the air inlet pipe 3 is located outside the shell 1, and the other end of the air inlet pipe 3 passes through the shell 1 and is provided with a bottom gas distributor 5.

[0031] The separation component is located inside the shell 1, and the separation component includes a layer bed 6, an aluminum oxide layer 7, a molecular sieve layer 8 and a nitrous oxide adsorption layer 9. The layer bed 6 is located above the bottom gas distributor 5, the aluminum oxide layer 7 is located above the layer bed 6, the molecular sieve layer 8 is located above the aluminum oxide layer 7, and the nitrous oxide adsorption layer 9 is located above the molecular sieve layer 8.

[0032] An airflow distribution device 10 is provided between the aluminum oxide layer 7 and the molecular sieve layer 8 , an airflow distribution device 2 11 is provided between the molecular sieve layer 8 and the nitrous oxide adsorption layer 9 , and an airflow distribution device 3 12 is provided above the nitrous oxide adsorption layer 9 .

[0033] In addition, the filling height of the aluminum oxide layer 7 is between 300-600 mm, the filling height of the molecular sieve layer 8 is between 800-1100 mm, and the filling height of the nitrous oxide adsorption layer 9 is between 50-100 mm. By providing the nitrous oxide adsorption layer 9, nitrous oxide in the air can be adsorbed, and the nitrous oxide adsorption rate is ≥95%, which can effectively avoid problems caused by the low nitrous oxide adsorption rate.

[0034] Specifically, the shell 1 is provided with gas outlet 13, gas outlet 2 14 and gas outlet 3 15, the gas outlet 13 is located on the side of the bottom gas distributor 5, the gas outlet 2 14 is located on the side of the molecular sieve layer 8, and the gas outlet 3 15 is located on the side of the top gas distributor 4.

[0035] In this embodiment, the bottom gas distributor 5 and the top gas distributor 4 have the same structure. The bottom gas distributor 5 includes a hole tube 501 and a wire mesh 502. A plurality of ventilation holes are opened on the outside of the hole tube 501. The wire mesh 502 is sleeved on the outside of the hole tube 501. The bottom gas distributor 5 can evenly distribute air to the interior of the separation component, thereby improving the separation efficiency of the separation component.

[0036] In this embodiment, a support rod 16 is provided at the lower side of the bed 6 , and a plurality of the support rods 16 are provided. The plurality of support rods 16 jointly support the bed 6 , and the support rods 16 are connected to the shell 1 .

[0037] In this embodiment, the air flow distribution device 10 and the air flow distribution device 3 12 have the same structure. The air flow distribution device 10 includes a orifice plate 1 and a wire mesh 2. The orifice plate 1 is set to be multiple, and two adjacent orifice plates 1 are connected by bolt 1. The wire mesh 2 is fixed above the orifice plate 1, and the wire mesh 2 is a 40-mesh stainless steel wire mesh. The air flow distribution device 2 11 includes a orifice plate 2 and a wire mesh 3. The orifice plate 2 is set to be multiple, and two adjacent orifice plates 2 are connected by bolt 2. The wire mesh 3 is fixed above the orifice plate 2, and the wire mesh 3 is an 80-mesh stainless steel wire mesh. Both the wire mesh 2 and the wire mesh 3 are made of 304 stainless steel.

[0038] In this embodiment, the air inlet pipe 3 and the air outlet pipe 2 are both provided in plurality, so that the gas entering the shell 1 is more uniform, thereby increasing the working efficiency.

[0039] Please refer to the actual application Figure 1 to Figure 4 The air enters the shell 1 through the air inlet pipe 3, and then is evenly distributed to the inside of the separation component through the bottom gas distributor 5. After passing through the separation component, the air is collected by the top gas distributor 4 and discharged from the air outlet pipe 2.

[0040] In the separation component, the aluminum oxide layer 7 is responsible for adsorbing moisture, the molecular sieve is responsible for adsorbing moisture, carbon dioxide and part of hydrocarbons, the nitrous oxide adsorption layer 9 is responsible for adsorbing nitrous oxide, and the air flow distribution device 1 10, the air flow distribution device 2 11 and the air flow distribution device 3 12 allow the gas inside the separation component to be evenly distributed in each separation layer, thereby improving the separation effect.

[0041] The adsorption rate of nitrous oxide in the present application is ≥95%. Compared with the molecular sieve adsorber in the prior art, the air separation performance is good and the safety is high.

[0042] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A horizontal molecular sieve adsorber for purifying a gas containing multiple components, characterized in that: It comprises a shell (1) and a separation assembly, wherein the upper and lower ends of the shell (1) are respectively provided with an air outlet pipe (2) and an air inlet pipe (3); One end of the air outlet pipe (2) is located outside the shell (1), and the other end of the air outlet pipe (2) passes through the shell (1) and is provided with a top gas distributor (4); one end of the air inlet pipe (3) is located outside the shell (1), and the other end of the air inlet pipe (3) passes through the shell (1) and is provided with a bottom gas distributor (5); The separation component is located inside the housing (1), and comprises a layer bed (6), an aluminum oxide layer (7), a molecular sieve layer (8) and a nitrous oxide adsorption layer (9); the layer bed (6) is located above the bottom gas distributor (5), the aluminum oxide layer (7) is located above the layer bed (6), the molecular sieve layer (8) is located above the aluminum oxide layer (7), and the nitrous oxide adsorption layer (9) is located above the molecular sieve layer (8); An air flow distribution device (10) is provided between the aluminum oxide layer (7) and the molecular sieve layer (8), an air flow distribution device (11) is provided between the molecular sieve layer (8) and the nitrous oxide adsorption layer (9), and an air flow distribution device (12) is provided above the nitrous oxide adsorption layer (9).

2. A horizontal molecular sieve adsorber for purifying a gas containing multiple components according to claim 1, characterized in that: The filling height of the aluminum oxide layer (7) is between 300 and 600 mm, the filling height of the molecular sieve layer (8) is between 800 and 1100 mm, and the filling height of the nitrous oxide adsorption layer (9) is between 50 and 100 mm.

3. A horizontal molecular sieve adsorber for purifying a gas containing multiple components according to claim 1, characterized in that: The shell (1) is provided with a gas outlet one (13), a gas outlet two (14) and a gas outlet three (15), wherein the gas outlet one (13) is located on one side of the bottom gas distributor (5), the gas outlet two (14) is located on one side of the molecular sieve layer (8), and the gas outlet three (15) is located on one side of the top gas distributor (4).

4. A horizontal molecular sieve adsorber for purifying a gas containing multiple components according to claim 1, characterized in that: The bottom gas distributor (5) and the top gas distributor (4) have the same structure. The bottom gas distributor (5) comprises a perforated tube (501) and a wire mesh (502).

5. A horizontal molecular sieve adsorber for purifying multi-component gas according to claim 1, characterized in that: A support rod (16) is provided on the lower side of the layer bed (6), and the support rod (16) is connected to the shell (1).

6. A horizontal molecular sieve adsorber for purifying multi-component gas according to claim 1, characterized in that: The air flow distribution device 1 (10) and the air flow distribution device 3 (12) have the same structure. The air flow distribution device 1 (10) includes a hole plate 1 and a wire mesh 2, and the air flow distribution device 2 (11) includes a hole plate 2 and a wire mesh 3.

7. A horizontal molecular sieve adsorber for purifying a gas containing multiple components according to claim 1, characterized in that: The air inlet pipe (3) and the air outlet pipe (2) are both provided in plurality.

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