Sulfur-containing tail gas treatment device for carbon nanotube production

Abstract

The utility model belongs to the technical field of tail gas treatment, and particularly relates to a sulfur-containing tail gas treatment device for carbon nano tube production, which comprises two symmetrically arranged reaction tanks filled with alkaline solution; a gas transmission assembly; an infusion assembly; an exhaust assembly; a liquid discharge assembly; when any reaction tank treats the sulfur-containing tail gas, the first three-way valve and the third three-way valve are opened, so that the gas inlet main pipe and the gas exhaust main pipe are communicated with the current reaction tank, the sulfur-containing tail gas reacts with the alkaline solution in the current reaction tank, and other gases are exhausted from the gas exhaust main pipe; and when the alkaline solution in the other reaction tank is saturated, the valve is opened to discharge the alkaline solution from the three-way pipe, then the valve is closed, the second three-way valve is opened, and the alkaline solution is supplemented into the current reaction tank through the liquid inlet header pipe. The continuity of the tail gas treatment process is ensured, and treatment interruption caused by replacement of an alkaline solution is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas treatment technology, specifically relating to a sulfur-containing exhaust gas treatment device for carbon nanotube production. Background Technology

[0002] The production process of carbon nanotubes generates sulfur-containing tail gas, among which hydrogen sulfide gas is one of the main pollutants.

[0003] Traditional treatment devices typically use alkaline liquid neutralization to treat hydrogen sulfide gas. While this method can absorb hydrogen sulfide gas to some extent, it becomes ineffective once the alkaline liquid is saturated. This necessitates frequent replacement of the alkaline liquid, which not only increases treatment costs but also affects the continuity and efficiency of the treatment process.

[0004] To address this issue, a method of spraying alkaline liquid has emerged to neutralize hydrogen sulfide gas. However, while this method avoids the hassle of frequently replacing the alkaline liquid, the limited contact area and reaction time of the spray result in unsatisfactory neutralization effects. It still cannot completely and effectively remove hydrogen sulfide gas from the exhaust gas, which may cause environmental pollution and harm to human health.

[0005] Therefore, in order to solve the above problems, it is necessary to design a sulfur-containing tail gas treatment device for carbon nanotube production. Utility Model Content

[0006] The purpose of this invention is to provide a sulfur-containing tail gas treatment device for carbon nanotube production, so as to solve the technical problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides a sulfur-containing tail gas treatment device for carbon nanotube production, comprising:

[0008] Two symmetrically arranged reaction vessels, each containing an alkaline solution;

[0009] The gas delivery assembly includes: a first three-way valve connected to the two reaction tanks and an inlet manifold connected to the first three-way valve;

[0010] The infusion assembly includes: a second three-way valve connected to the two reaction tanks and an inlet manifold connected to the second three-way valve;

[0011] The exhaust assembly includes: a third three-way valve connected to the two reaction vessels and an exhaust manifold connected to the third three-way valve;

[0012] The drainage assembly includes: valves connected to the bottom of the reaction tank and a three-way pipe connecting the two valves; wherein...

[0013] When any of the aforementioned reaction vessels processes sulfur-containing tail gas, the first three-way valve and the third three-way valve are opened to connect the inlet manifold and the outlet manifold to the current reaction vessel, so that the sulfur-containing tail gas reacts with the alkaline solution in the current reaction vessel, and other gases are discharged from the outlet manifold; and

[0014] When the alkaline solution in the other reaction vessel is saturated, open the valve to discharge the alkaline solution from the three-way pipe, then close the valve and open the second three-way valve to replenish the current reaction vessel with alkaline solution through the main inlet pipe.

[0015] Furthermore, the gas delivery assembly also includes: two intake branch pipes connected to the first three-way valve; wherein

[0016] The two intake manifolds respectively penetrate the side walls of the two reaction vessels; and

[0017] The outlet end of the inlet branch pipe is close to the bottom of the reaction vessel so that the discharged sulfur-containing gas can come into full contact with the alkaline solution.

[0018] Furthermore, the infusion assembly also includes: two inlet branch pipes connected to the second three-way valve and a one-way valve connected to the inlet branch pipes; wherein

[0019] The two inlet branch pipes respectively penetrate the side walls of the two reaction tanks;

[0020] The one-way valve is located inside the reaction vessel; and

[0021] The one-way valve is located above the alkaline solution and does not come into contact with the alkaline solution.

[0022] Furthermore, the exhaust assembly also includes: two exhaust branch pipes connected to the third three-way valve; wherein

[0023] The exhaust branch pipe is connected to the reaction vessel; and

[0024] The exhaust branch pipe is located above the side of the reaction vessel.

[0025] Furthermore, a maintenance pipe is provided on the side of the reaction vessel;

[0026] The inspection pipe is equipped with a gas detector;

[0027] The inspection pipe is equipped with a sealing cap.

[0028] Furthermore, the reaction vessel is equipped with a baffle plate;

[0029] A rat cage is embedded in the middle of the partition;

[0030] The rat cage is equipped with several adsorbent packets; and

[0031] The rat cage is plugged into the partition.

[0032] The beneficial effects of the utility model are:

[0033] (i) When the device is running, sulfur-containing tail gas is first introduced into a reaction tank through the main inlet pipe and the first three-way valve of the gas supply assembly, so that the sulfur-containing tail gas reacts with the alkaline solution to remove hydrogen sulfide from the tail gas. At the same time, the treated gas is discharged through the third three-way valve and the exhaust main pipe of the exhaust assembly for further treatment or directly discharged into the air. When the alkaline solution in the reaction tank reaches saturation, it is discharged through the valve and three-way pipe of the drain assembly, and new alkaline solution is added to the reaction tank through the second three-way valve and the inlet main pipe of the liquid supply assembly. At this time, the tail gas can be introduced into another reaction tank for treatment by switching the first three-way valve and the third three-way valve in the gas supply assembly and the exhaust assembly. When the alkaline solution in the other reaction tank also reaches saturation, the above steps are repeated, so as to ensure the continuity of the tail gas treatment process by alternating the use of dual reaction tanks and avoid the interruption of treatment caused by changing alkaline solution. At the same time, by regenerating or treating saturated alkaline solution, the environmental impact of waste liquid discharge is reduced.

[0034] 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.

[0035] 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

[0036] 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.

[0037] Figure 1 The three-dimensional representation of the preferred embodiment of this utility model. Figure 1 ;

[0038] Figure 2 This is a perspective view of a preferred embodiment of the interior of the reaction vessel of this utility model;

[0039] Figure 3 The three-dimensional representation of the preferred embodiment of this utility model. Figure 2 .

[0040] In the picture:

[0041] Reactor 1, inspection pipe 101, sealing cover 102, partition 103;

[0042] Gas delivery assembly 2, first three-way valve 201, main intake pipe 202, intake branch pipe 203;

[0043] Infusion assembly 3, second three-way valve 301, main inlet pipe 302, inlet branch pipe 303, one-way valve 304;

[0044] Exhaust assembly 4, third three-way valve 401, exhaust main pipe 402, exhaust branch pipe 403;

[0045] Drainage assembly 5, valve 501, tee pipe 502;

[0046] 6. Gas detector; 7. Rat cage. Detailed Implementation

[0047] 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

[0048] like Figures 1 to 3 As shown, this embodiment provides a sulfur-containing tail gas treatment device for carbon nanotube production, comprising:

[0049] Two symmetrically arranged reaction tanks 1, each containing an alkaline solution; a gas supply assembly 2, comprising: a first three-way valve 201 connected to both reaction tanks 1 and an inlet main pipe 202 connected to the first three-way valve 201; a liquid supply assembly 3, comprising: a second three-way valve 301 connected to both reaction tanks 1 and a liquid inlet main pipe 302 connected to the second three-way valve 301; an exhaust assembly 4, comprising: a third three-way valve 401 connected to both reaction tanks 1 and an exhaust main pipe 402 connected to the third three-way valve 401; and a drain assembly 5, comprising: valves 501 connected to the bottom of each reaction tank 1 and three-way pipes 502 connected to both valves 501; wherein, when either reaction tank 1 processes sulfur-containing tail gas, the first three-way valve 201 and the third three-way valve 401 are opened, allowing the inlet main pipe 202 and the exhaust main pipe 402 to connect with... The current reaction tank 1 is connected to allow the sulfur-containing tail gas to react with the alkaline solution in the current reaction tank 1, and other gases are discharged from the exhaust manifold 402; and when the alkaline solution in the other reaction tank 1 is saturated, valve 501 is opened to discharge the alkaline solution from the three-way pipe 502, then valve 501 is closed, and the second three-way valve 301 is opened to replenish the current reaction tank 1 through the liquid inlet manifold 302; wherein the alkaline solution is, but is not limited to, sodium hydroxide solution; wherein the first three-way valve 201, the second three-way valve 301, the third three-way valve 401 and valve 501 are, but are not limited to, solenoid valves or pneumatic valves, thereby achieving the effect of remote control or automatic switching; wherein the reaction tank 1 is equipped with a stirring device (not shown in the figure) to ensure that the alkaline solution and tail gas react fully.

[0050] In this embodiment, when the device is running, sulfur-containing tail gas is first introduced into a reaction tank 1 through the main inlet pipe 202 and the first three-way valve 201 of the gas supply assembly 2, so that the sulfur-containing tail gas reacts with the alkaline solution to remove hydrogen sulfide from the tail gas. At the same time, the treated gas is discharged through the third three-way valve 401 and the exhaust main pipe 402 of the exhaust assembly 4 for further processing or directly discharged into the air. When the alkaline solution in the reaction tank 1 reaches saturation, it is discharged through the valve 501 and the three-way pipe 502 of the liquid discharge assembly 5, and then discharged through the second three-way valve of the liquid supply assembly 3. 301 and the inlet manifold 302 replenish the reaction tank with new alkaline solution. At this time, the exhaust gas can be introduced into another reaction tank 1 for treatment by switching the first three-way valve 201 and the third three-way valve 401 in the gas supply assembly 2 and the exhaust assembly 4. When the alkaline solution in the other reaction tank 1 also reaches saturation, the above steps are repeated. This achieves the goal of ensuring the continuity of the exhaust gas treatment process by using the two reaction tanks 1 alternately, avoiding the interruption of treatment caused by changing the alkaline solution. At the same time, by regenerating or treating the saturated alkaline solution, the environmental impact of waste liquid discharge is reduced.

[0051] The gas delivery assembly 2 further includes: two inlet branch pipes 203 connected to the first three-way valve 201; wherein the two inlet branch pipes 203 respectively penetrate the side walls of the two reaction tanks 1; and the outlet end of the inlet branch pipe 203 is close to the bottom of the reaction tank 1 so that the discharged sulfur-containing gas can fully contact the alkaline solution; wherein by having the outlet end of the inlet branch pipe 203 close to the bottom of the reaction tank, the exhaust gas can more fully contact the alkaline solution, thereby improving the removal efficiency of hydrogen sulfide. At the same time, since the exhaust gas has more sufficient contact with the alkaline solution, the amount of alkaline solution required may be reduced accordingly, thereby reducing the treatment cost.

[0052] The infusion assembly 3 further includes: two inlet branch pipes 303 connected to the second three-way valve 301 and a one-way valve 304 connected to the inlet branch pipes 303; wherein the two inlet branch pipes 303 respectively penetrate the side walls of the two reaction tanks 1; the one-way valve 304 is located inside the reaction tank 1; and the one-way valve 304 is located above the alkaline solution and does not come into contact with the alkaline solution; wherein by setting the one-way valve 304, the liquid or gas in the reaction tank 1 is prevented from flowing back into the inlet branch pipes 303 when the pressure changes, so as to maintain the stability and safety of the device.

[0053] The exhaust assembly 4 further includes: two exhaust branch pipes 403 connected to the third three-way valve 401; wherein the exhaust branch pipes 403 are connected to the reaction vessel 1; and the exhaust branch pipes 403 are located above the side of the reaction vessel 1.

[0054] The side of the reaction vessel 1 is provided with a maintenance pipe 101; a gas detector 6 is installed inside the maintenance pipe 101; a sealing cover 102 is provided on the maintenance pipe 101; wherein the gas detector 6 is, but is not limited to, a fixed hydrogen sulfide gas detector; wherein the maintenance pipe 101 is provided to facilitate maintenance personnel to inspect, maintain or clean the reaction vessel 1; wherein the sealing cover 102 is provided to seal the maintenance pipe 101 when maintenance is not required to prevent gas leakage; wherein the gas detector 6 is provided to measure the hydrogen sulfide gas in the reaction vessel 1 and to alert the staff when the concentration exceeds a certain level, thereby preventing the hydrogen sulfide gas from becoming unmanageable after the alkaline solution becomes saturated and the reaction vessel 1 cannot be switched in time.

[0055] The reaction vessel 1 is equipped with a partition 103; a rat cage 7 is embedded in the middle of the partition 103; the rat cage 7 is equipped with several adsorbent packs; and the rat cage 7 is inserted into the partition 103; wherein the adsorbent packs are, but are not limited to, activated carbon packs; wherein by setting the adsorbent packs, the unreactable hydrogen sulfide gas is adsorbed, preventing the hydrogen sulfide gas from being discharged; wherein the rat cage 7 includes: a perforated sleeve and filter discs set on both sides of the perforated sleeve, wherein the filter discs are movably connected to the perforated sleeve to facilitate the replacement of the adsorbent packs.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0060] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0061] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0062] 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 sulfur-containing tail gas treatment device for carbon nanotube production, characterized in that, include: Two symmetrically arranged reaction vessels (1) are provided with an alkaline solution inside the vessels; Gas delivery assembly (2), which includes: a first three-way valve (201) connected to the two reaction tanks (1) and an inlet manifold (202) connected to the first three-way valve (201). The infusion assembly (3) includes: a second three-way valve (301) connected to the two reaction tanks (1) and an inlet manifold (302) connected to the second three-way valve (301). The exhaust assembly (4) includes: a third three-way valve (401) connected to the two reaction vessels (1) and an exhaust manifold (402) connected to the third three-way valve (401). The drain assembly (5) includes: valves (501) connected to the bottom of the reaction tank (1) and a three-way pipe (502) connected to both valves (501); wherein When any of the aforementioned reaction vessels (1) processes sulfur-containing tail gas, the first three-way valve (201) and the third three-way valve (401) are opened to connect the inlet manifold (202) and the exhaust manifold (402) to the current reaction vessel (1), so that the sulfur-containing tail gas reacts with the alkaline solution in the current reaction vessel (1), and other gases are discharged from the exhaust manifold (402); and When the alkaline solution in the other reaction vessel (1) is saturated, open the valve (501) to discharge the alkaline solution from the three-way pipe (502), then close the valve (501), open the second three-way valve (301), and replenish the current reaction vessel (1) with alkaline solution through the liquid inlet main pipe (302).

2. The sulfur-containing tail gas treatment device for carbon nanotube production as described in claim 1, characterized in that, The gas delivery assembly (2) further includes: two intake branch pipes (203) connected to the first three-way valve (201); wherein The two intake manifolds (203) penetrate the side walls of the two reaction vessels (1) respectively; and The outlet end of the inlet branch pipe (203) is close to the bottom of the reaction vessel (1) so that the discharged sulfur-containing gas can fully contact the alkaline solution.

3. The sulfur-containing tail gas treatment device for carbon nanotube production as described in claim 2, characterized in that, The infusion assembly (3) further includes: two inlet branch pipes (303) connected to the second three-way valve (301) and a one-way valve (304) connected to the inlet branch pipes (303); wherein The two inlet branch pipes (303) respectively penetrate the side walls of the two reaction vessels (1); The one-way valve (304) is located inside the reaction vessel (1); and The one-way valve (304) is located above the alkaline solution and does not come into contact with the alkaline solution.

4. The sulfur-containing tail gas treatment device for carbon nanotube production as described in claim 3, characterized in that, The exhaust assembly (4) further includes: two exhaust branch pipes (403) connected to the third three-way valve (401); wherein The exhaust branch pipe (403) is connected to the reaction vessel (1); and The exhaust branch pipe (403) is located above the side of the reaction vessel (1).

5. The sulfur-containing tail gas treatment device for carbon nanotube production as described in claim 4, characterized in that, The side of the reaction vessel (1) is provided with a maintenance pipe (101). The inspection tube (101) is equipped with a gas detector (6). The inspection pipe (101) is provided with a sealing cap (102).

6. The sulfur-containing tail gas treatment device for carbon nanotube production as described in claim 5, characterized in that, The reaction vessel (1) is equipped with a baffle (103); A rat cage (7) is embedded in the middle of the partition (103); The rat cage (7) is equipped with several adsorbent packets; and The rat cage (7) is inserted into the partition (103).

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