Pressure Swing Adsorption Separation Device for Carbon Nanotube Production

Abstract

This utility model belongs to the field of carbon nanotube production technology, specifically relating to a pressure swing adsorption (PSA) separation device for tail gas in carbon nanotube production. The device includes two adsorption components, each comprising a housing, a cover, and several topless cages. The housing has a flange at the top; the cover is bolted to the flange; the topless cages are stacked within their respective housings; some of the topless cages contain several adsorbent packets; another portion of the topless cages contain several molecular sieve packets; each housing contains at least one topless cage containing an adsorbent packet and at least one topless cage containing a molecular sieve packet. This PSA separation device for tail gas in carbon nanotube production, by setting topless cages containing adsorbent packets and molecular sieve packets within the housings of the adsorption components, achieves simultaneous adsorption of multiple impurity gases in the tail gas, improving the purity of the separated and purified hydrogen, and meeting the demand for high-quality hydrogen in carbon nanotube production.

Description

Technical Field

[0001] This utility model belongs to the field of carbon nanotube production technology, specifically relating to a pressure swing adsorption separation device for tail gas in carbon nanotube production. Background Technology

[0002] The production process of carbon nanotubes generates exhaust gases containing various components. Among these, hydrogen is a gas with high economic value. Efficient separation, purification, and recycling of hydrogen not only reduces production costs but also aligns with the principles of green environmental protection. Currently, pressure swing adsorption (PSA) technology is commonly used to treat the exhaust gases from carbon nanotube production. The adsorption material within the adsorption tank adsorbs impurities in the exhaust gases, thereby achieving the separation and purification of hydrogen.

[0003] However, the adsorption structure design inside the adsorption tank of existing carbon nanotube production tail gas pressure swing adsorption (PSA) separation devices is unreasonable. They typically only have a single adsorption layer, allowing adsorption of only one or a few gases in the tail gas. This makes it difficult to meet the requirement of simultaneously adsorbing multiple impurity gases in the tail gas, resulting in low purity hydrogen after separation and purification, failing to meet ideal recycling standards. Furthermore, when the adsorbent material reaches saturation and needs replacement, the process is extremely cumbersome. Because the adsorbent material is tightly packed inside the adsorption tank, the entire tank must be disassembled, consuming significant time and manpower to remove the adsorbent material and refill it with new material. This not only reduces production efficiency but also increases production costs.

[0004] Therefore, in order to solve the above problems, it is necessary to design a pressure swing adsorption separation device for tail gas in carbon nanotube production. Utility Model Content

[0005] The purpose of this invention is to provide a pressure swing adsorption separation device for tail gas in carbon nanotube production, so as to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a pressure swing adsorption separation device for tail gas in carbon nanotube production, comprising:

[0007] Two adsorption components, comprising: a box body, a box cover, and several topless cages; wherein

[0008] The top of the box is provided with a flange.

[0009] The box cover is bolted to the flange.

[0010] Each of the aforementioned topless cages is stacked and arranged within its respective box; and

[0011] Some of the topless cages contain several adsorbent packets;

[0012] The other part describes a topless cage containing several molecular sieve packets;

[0013] The box contains at least one topless cage for holding an adsorbent pack and at least one topless cage for holding a molecular sieve pack.

[0014] Furthermore, the bottom pipes of both boxes are connected to the same first three-way valve; wherein

[0015] The other end of the first three-way valve is connected to a blower; and

[0016] The blower is suitable for delivering pre-treated exhaust gas to any box after it is switched on and off by the first three-way valve.

[0017] Furthermore, the top pipe of the box cover is connected to the same second three-way valve; wherein

[0018] The other end of the pipe of the second three-way valve is connected to a buffer tank; and

[0019] The buffer tank is suitable for adjusting the pressure inside the container and temporarily storing processed gas.

[0020] Furthermore, both of the aforementioned boxes have a T-shaped pipe connected to their bottoms; wherein...

[0021] One end of each of the two three-way pipes is connected to one of the two pipes at the two ends of the first three-way valve;

[0022] The other end of the two tee pipes is connected to a third tee valve; and

[0023] The other end of the third three-way valve is connected to a vacuum pump;

[0024] The vacuum pump is suitable for conveying the gas released from the adsorbent pack and the molecular sieve pack.

[0025] The beneficial effects of this utility model are:

[0026] (I) This utility model achieves the simultaneous adsorption of multiple impurity gases in the exhaust gas by setting an open cage containing an adsorbent package and a molecular sieve package inside the box of the adsorption component, thereby improving the purity of the hydrogen after separation and purification and meeting the demand for high-quality hydrogen in the production of carbon nanotubes. At the same time, the box and the cover of the adsorption component are connected by bolts, which is convenient for disassembly and installation. When it is necessary to replace the adsorbent material, simply open the cover and lift out the open cage for replacement, saving time and manpower and reducing maintenance costs.

[0027] (II) The blower of this utility model delivers the pre-treated exhaust gas to one of the adsorption components via the first three-way valve. Within the adsorption component, the exhaust gas passes through the adsorbent pack and molecular sieve pack in the topless cage, where impurities are adsorbed and valuable gases such as hydrogen are separated. The treated gas then enters a buffer tank via the second three-way valve for temporary storage and pressure adjustment, awaiting further processing or recycling. When the adsorption material reaches saturation, the first three-way valve is switched, allowing the exhaust gas to be delivered to another adsorption component for adsorption. Simultaneously, a vacuum pump is activated to evacuate the saturated adsorption component, causing the adsorbent pack and molecular sieve pack to release the adsorbed gas, achieving regeneration. The released gas is discharged to a designated location via the third three-way valve and the vacuum pump for further processing or recycling, reducing environmental pollution. The system, through the coordination of the first, second, and third three-way valves, achieves alternating adsorption and regeneration of the two adsorption components, ensuring continuous production and improving production efficiency.

[0028] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is an exploded view of a preferred embodiment of the adsorption component of this utility model;

[0032] Figure 2 This is a perspective view of a preferred embodiment of the present invention.

[0033] In the picture:

[0034] Adsorption component 1, box body 101, flange 1011, box cover 102, topless cage 103;

[0035] 1. Three-way valve 2. Blower 3. Two-way valve 4. Buffer tank 5. Three-way pipe 6. Three-way valve 7. Vacuum pump 8. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0037] like Figures 1 to 2 As shown, this embodiment provides a pressure swing adsorption separation device for tail gas in carbon nanotube production, comprising:

[0038] Two adsorption components 1, each comprising: a box body 101, a box cover 102, and several topless cages 103; wherein the box body 101 has a flange 1011 on its top; the box cover 102 is bolted to the flange 1011; each of the topless cages 103 is stacked within its respective box body 101; and some of the topless cages 103 contain several adsorbent packets; another portion of the topless cages 103 contain several molecular sieve packets; each box body 101 contains at least one topless cage 103 containing an adsorbent packet and at least one topless cage 103 containing a molecular sieve packet; wherein a sealing ring (not shown in the figure) is provided between the flange 1011 of the box body 101 and the box cover 102 to prevent gas leakage; wherein activated carbon adsorbent packets are preferred; wherein the molecular sieve packets are, but are not limited to, 5A molecular sieves.

[0039] In this embodiment, by setting an open cage 103 containing the adsorbent and molecular sieve package inside the box 101 of the adsorption component 1, multiple impurity gases in the exhaust gas are simultaneously adsorbed, improving the purity of the hydrogen after separation and purification, and meeting the demand for high-quality hydrogen during carbon nanotube production. At the same time, the box 101 and the cover 102 of the adsorption component 1 are connected by bolts, which facilitates disassembly and installation. When the adsorbent material needs to be replaced, simply open the cover 102 and lift out the open cage 103 for replacement, saving time and manpower and reducing maintenance costs.

[0040] The bottom pipes of the two boxes 101 are connected to the same first three-way valve 2; the other end of the pipe of the first three-way valve 2 is connected to a blower 3; and the blower 3 is adapted to deliver the pre-treated exhaust gas to either box 101 after the first three-way valve 2 is switched on and off.

[0041] The top pipe of the lid 102 is connected to the same second three-way valve 4; the other end of the second three-way valve 4 is connected to a buffer tank 5; and the buffer tank 5 is adapted to adjust the pressure inside the box 101 and temporarily store the processed gas.

[0042] The bottom of both boxes 101 is connected to a three-way pipe 6; one end of each of the two three-way pipes 6 is connected to both ends of the first three-way valve 2; the other end of each of the two three-way pipes 6 is connected to a third three-way valve 7; and the other end of the third three-way valve 7 is connected to a vacuum pump 8; the vacuum pump 8 is suitable for conveying the gas released from the adsorbent pack and the molecular sieve pack.

[0043] In this embodiment, the first three-way valve 2, the second three-way valve 4, and the third three-way valve 7 are all electric three-way valves, to facilitate system control and eliminate the need for manual intervention.

[0044] In this embodiment, the blower 3 delivers the pretreated exhaust gas to one of the adsorption components 1 via the first three-way valve 2. Within the adsorption component 1, the exhaust gas passes through the adsorbent pack and molecular sieve pack in the topless cage 103, where impurities are adsorbed and valuable gases such as hydrogen are separated. The treated gas then enters the buffer tank 5 via the second three-way valve 4 for temporary storage and pressure adjustment, awaiting further processing or recycling. When the adsorption material reaches saturation, the first three-way valve 2 is switched, allowing the exhaust gas to be delivered to another adsorption component 1 for adsorption. Simultaneously, the vacuum pump 8 is activated to evacuate the saturated adsorption component 1, causing the adsorbent pack and molecular sieve pack to release the adsorbed gas, achieving regeneration. The released gas is discharged to a designated location via the third three-way valve 7 and the vacuum pump 8 for further processing or recycling, reducing environmental pollution. The system, through the cooperation of the first three-way valve 2, the second three-way valve 4, and the third three-way valve 7, achieves alternating adsorption and regeneration of the two adsorption components 1, ensuring continuous production and improving production efficiency.

[0045] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0046] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tail gas pressure swing adsorption separation device for carbon nanotube production, characterized by, include: Two adsorption components (1) include: a box body (101), a box cover (102) and several topless cages (103); in The top of the box body (101) is provided with a flange (1011). The cover (102) is bolted to the flange (1011); Each of the aforementioned open cages (103) is stacked within its corresponding box (101); and The topless cage (103) contains several adsorbent packets; The other part of the topless cage (103) contains several molecular sieve bags; The box (101) contains at least one topless cage (103) for holding an adsorbent pack and at least one topless cage (103) for holding a molecular sieve pack.

2. The pressure swing adsorption separation device for tail gas in carbon nanotube production as described in claim 1, characterized in that, The bottom pipes of the two boxes (101) are connected to the same first three-way valve (2); wherein The other end of the pipe of the first three-way valve (2) is connected to a blower (3); and The blower (3) is adapted to deliver the pretreated exhaust gas to any box (101) after the first three-way valve (2) is turned on and off.

3. The pressure swing adsorption separation device for tail gas in carbon nanotube production as described in claim 2, characterized in that, The top pipe of the cover (102) is connected to the same second three-way valve (4); wherein The other end of the pipe of the second three-way valve (4) is connected to a buffer tank (5); and The buffer tank (5) is suitable for adjusting the pressure inside the box (101) and temporarily storing the treated gas.

4. The pressure swing adsorption separation device for tail gas in carbon nanotube production as described in claim 3, characterized in that, Both of the aforementioned boxes (101) have a tee pipe (6) connected to their bottoms; wherein One end of each of the two three-way pipes (6) is connected to the two ends of the first three-way valve (2); The other end of the two three-way pipes (6) is connected to a third three-way valve (7); and The other end of the pipe of the third three-way valve (7) is connected to a vacuum pump (8); The vacuum pump (8) is adapted to transport the gas released from the adsorbent pack and the molecular sieve pack.

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