A sulfur-containing tail gas treatment device for carbon nanotube production

Abstract

This utility model belongs to the technical field of sulfur-containing tail gas treatment equipment, specifically relating to a sulfur-containing tail gas treatment device for carbon nanotube production. The device includes at least three treatment units, each comprising: a tank for storing an alkaline solution and an L-shaped pipe mounted on the tank; wherein the L-shaped pipe penetrates the tank, with its inlet located outside the tank and its outlet located inside the tank and immersed in the alkaline solution; and a pipe connecting the tank in the current treatment unit to the inlet of the L-shaped pipe in the next treatment unit. This sulfur-containing tail gas treatment device for carbon nanotube production introduces the sulfur-containing tail gas into the first tank through the first L-shaped pipe and discharges it from the outlet of the L-shaped pipe. The sulfur-containing components undergo a neutralization reaction with the alkaline solution. The pre-treated gas is discharged into the next L-shaped pipe to repeat the gas-liquid reaction process until it is discharged from the last tank, thereby increasing the contact time and ensuring that the sulfur-containing components in the tail gas are fully removed.

Description

Technical Field

[0001] This utility model belongs to the technical field of sulfur-containing tail gas treatment equipment, specifically relating to a sulfur-containing tail gas treatment equipment used in carbon nanotube production. Background Technology

[0002] Carbon nanotubes, as a novel nanomaterial, have broad application prospects in energy storage, composite materials, and electronic devices due to their excellent mechanical, electrical, and thermal properties. However, with the expansion of industrial-scale carbon nanotube production, the treatment of sulfur-containing waste gases generated during the production process has become increasingly prominent. The main methods for preparing carbon nanotubes include chemical vapor deposition (CVD) and arc discharge methods. Processes involving sulfur-containing catalysts or raw materials will produce sulfur-containing waste gases, such as sulfur dioxide (SO2) and hydrogen sulfide (H2S). If these waste gases are emitted directly without effective treatment, they will not only cause environmental problems such as acid rain and air pollution, but may also pose serious threats to human health and the ecological environment.

[0003] Although traditional wet desulfurization has advantages such as high desulfurization efficiency and mature technology, the gas-liquid contact time of spray towers or packed towers is short, which cannot completely and effectively remove sulfur-containing gases from the exhaust gas.

[0004] 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

[0005] 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.

[0006] To address the aforementioned technical problems, this utility model provides a sulfur-containing tail gas treatment device for carbon nanotube production, comprising:

[0007] At least three processing units, each comprising: a tank for storing an alkaline solution and an L-shaped pipe mounted on the tank; wherein

[0008] The L-shaped pipe penetrates the tank, with the inlet end located outside the tank and the outlet end located inside the tank and immersed in the alkaline solution; and

[0009] The tank in the current processing unit is connected to the L-shaped air inlet pipe in the next processing unit.

[0010] Furthermore, a conduit is provided between adjacent processing units; wherein

[0011] One end of the conduit is connected to the top of the tank;

[0012] The processing mechanism further includes: a fan; wherein

[0013] The air outlet of the fan is connected to the air inlet of the L-shaped pipe; and

[0014] The air inlet of the fan is connected to the other end of the duct;

[0015] The air inlet of the fan described at the first end is suitable for connection with upstream equipment.

[0016] Furthermore, a pipe is connected to the top of the end tank; wherein

[0017] The pipeline is equipped with a demister; and

[0018] The other end of the pipe is adapted to connect to downstream equipment.

[0019] Furthermore, the processing mechanism further includes: at least two stirring components; wherein

[0020] The stirring assembly includes: a stirring rod connected to a bearing at the top of the tank, at least two layers of blades sleeved on the stirring rod, a reducer connected to the top of the stirring rod, and a motor connected to the reducer; wherein

[0021] The blade assembly includes: a collar sleeved on the stirring rod and at least two stirring blades arranged in a circular array on the collar;

[0022] The speed reducer is located at the top of the tank;

[0023] The motor is mounted on the reducer; and

[0024] The motor is adapted to drive the stirring rod to rotate via a reducer, so as to drive each blade group to stir the alkaline solution.

[0025] Furthermore, the processing mechanism also includes a valve that communicates with the bottom of the tank.

[0026] Furthermore, the tank body is provided with an inspection port;

[0027] A sealing cap is movably connected to the tank body;

[0028] The sealing cap is adapted to cover the access port to seal it.

[0029] Furthermore, the processing mechanism also includes: a liquid inlet pipe communicating with the tank; wherein

[0030] The other end of the inlet pipe is adapted to be connected to an infusion device.

[0031] The beneficial effects of this utility model are:

[0032] (I) This utility model introduces sulfur-containing tail gas into the first-end tank through the first-end L-shaped pipe and discharges it from the outlet end of the L-shaped pipe. The sulfur-containing components undergo a neutralization reaction with the alkaline solution. The gas after preliminary treatment is discharged into the next L-shaped pipe to repeat the gas-liquid reaction process until it is discharged from the end tank, thereby increasing the contact time and ensuring that the sulfur-containing components in the tail gas are fully removed.

[0033] 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.

[0034] 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

[0035] 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.

[0036] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0037] Figure 2 This is a perspective view of a preferred embodiment of the end-of-life processing mechanism of this utility model;

[0038] Figure 3 This is a schematic diagram of a preferred embodiment of the tank body of this utility model.

[0039] In the picture:

[0040] Processing mechanism 1, tank 11, sealing cover 111, L-shaped pipe 12, blower 13, stirring assembly 14, stirring rod 141, blade assembly 142, collar 1421, stirring blade 1422, reducer 143, motor 144, valve 15, liquid inlet pipe 16;

[0041] 2. Conduit 3. Pipe 4. Demister Detailed Implementation

[0042] 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

[0043] like Figures 1 to 3 As shown, this embodiment provides a sulfur-containing tail gas treatment device for carbon nanotube production, comprising:

[0044] At least three processing units 1, each processing unit 1 including: a tank 11 for storing an alkaline solution and an L-shaped pipe 12 disposed on the tank 11; wherein the L-shaped pipe 12 penetrates the tank 11, with its inlet end located outside the tank 11 and its outlet end located inside the tank 11 and immersed in the alkaline solution; and the tank 11 in the current processing unit 1 is connected to the inlet end of the L-shaped pipe 12 in the next processing unit 1; wherein by immersing the outlet end of the L-shaped pipe 12 in the alkaline solution, the gas-liquid connection is extended when introducing sulfur-containing tail gas into the solution. Contact time is adjusted to improve reaction efficiency; the alkaline solution is, but not limited to, limestone solution; by setting at least three processing mechanisms 1, when the alkaline solution in any one tank 11 is about to be saturated, it can be drained and replenished (drained and replenished simultaneously or drained and replenished), and even if the reaction is incomplete, it can be fully desulfurized through the remaining tanks 11; the tank 11 is also suitable for setting a sensor (such as one or more of a conductivity sensor, density meter or pH sensor, not shown in the figure) to detect the solubility of the alkaline solution, so as to prompt the replacement of the alkaline solution.

[0045] In this embodiment, the sulfur-containing exhaust gas enters the first-end tank 11 through the first-end L-shaped pipe 12 and is discharged from the outlet end of the L-shaped pipe 12. The sulfur-containing components undergo a neutralization reaction with the alkaline solution. The pre-treated gas is discharged into the next L-shaped pipe 12 to repeat the gas-liquid reaction process until it is discharged from the end tank 11, thereby increasing the contact time and ensuring that the sulfur-containing components in the exhaust gas are fully removed.

[0046] A conduit 2 is provided between adjacent processing units 1; one end of the conduit 2 is connected to the top of the tank 11; the processing unit 1 further includes a fan 13; the outlet end of the fan 13 is connected to the inlet end of the L-shaped pipe 12; and the inlet end of the fan 13 is connected to the other end of the conduit 2; the inlet end of the fan 13 is adapted to be connected to upstream equipment; the fan 13 is, but is not limited to, a centrifugal fan; by setting the fan 13, the exhaust gas is driven to flow between the tanks 11, while ensuring that the exhaust gas can be discharged from the alkaline solution.

[0047] The top of the end tank 11 is connected to a pipe 3; wherein a demister 4 is provided in the pipe 3; and the other end of the pipe 3 is adapted to be connected to downstream equipment; wherein by providing the demister 4, droplets or mist-like alkaline solutions in the purified gas are removed to prevent secondary pollution.

[0048] The processing mechanism 1 further includes: at least two stirring assemblies 14; wherein the stirring assembly 14 includes: a stirring rod 141 connected to the top bearing of the tank 11, at least two layers of blades 142 sleeved on the stirring rod 141, a reducer 143 connected to the top of the stirring rod 141, and a motor 144 connected to the reducer 143; wherein the blades 142 include: a collar 1421 sleeved on the stirring rod 141 and at least two stirring blades 1422 arranged in a circular array on the collar 1421; the reducer 143 The device is mounted on the top of the tank 11; the motor 144 is mounted on the reducer 143; and the motor 144 is adapted to drive the stirring rod 141 to rotate through the reducer 143, so as to drive each blade assembly 142 to stir the alkaline solution; wherein the bearing connection between the tank 11 and the stirring rod 141 is preferably sealed with packing to avoid leakage of harmful gases; wherein by setting at least two layers of blade assemblies 142, the alkaline solution at different liquid levels can be stirred to prevent uneven local concentration or precipitation of the solution, thereby enhancing the gas-liquid mixing effect.

[0049] The processing mechanism 1 further includes a valve 15 connected to the bottom of the tank 11; wherein the valve 15 is adapted to be connected to a post-processing device; by setting the valve 15, it is possible to periodically discharge the waste liquid after the reaction or replenish fresh alkaline solution; wherein the valve 15 is, but is not limited to, an electric butterfly valve.

[0050] The tank 11 is provided with an inspection port; a sealing cover 111 is movably connected to the tank 11; the sealing cover 111 is adapted to cover the inspection port to seal the inspection port; by providing an inspection port, it is convenient to maintain and clean the inside of the tank 11 and install the stirring components, etc.

[0051] The processing mechanism 1 further includes: an inlet pipe 16 connected to the tank 11; wherein the other end of the inlet pipe 16 is adapted to be connected to a delivery device; wherein by setting the inlet pipe 16, it is convenient to replenish the alkaline solution in the tank 11, realize automatic replenishment, and reduce manual intervention.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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: At least three processing units (1), each processing unit (1) includes: a tank (11) for storing alkaline solution and an L-shaped pipe (12) disposed on the tank (11). in The L-shaped tube (12) penetrates the tank body (11), with the inlet end located outside the tank body (11) and the outlet end located inside the tank body (11) and immersed in the alkaline solution; and The tank (11) in the current processing mechanism (1) is connected to the air inlet pipe of the L-shaped pipe (12) in the next processing mechanism (1).

2. The sulfur-containing tail gas treatment equipment for carbon nanotube production as described in claim 1, characterized in that, A conduit (2) is provided between adjacent processing units (1); in One end of the conduit (2) is connected to the top of the tank (11); The processing mechanism (1) further includes: a fan (13); wherein The air outlet of the fan (13) is connected to the air inlet of the L-shaped pipe (12); as well as The air inlet of the fan (13) is connected to the other end of the duct (2); The air inlet of the fan (13) at the first end is adapted to be connected to the upstream equipment.

3. The sulfur-containing tail gas treatment equipment for carbon nanotube production as described in claim 2, characterized in that, The top of the end tank (11) is connected to a pipe (3); wherein The pipe (3) is equipped with a demister (4); and The other end of the pipe (3) is adapted to be connected to downstream equipment.

4. The sulfur-containing tail gas treatment equipment for carbon nanotube production as described in claim 3, characterized in that, The processing mechanism (1) further includes: at least two stirring components (14); wherein The stirring assembly (14) includes: a stirring rod (141) connected to the top bearing of the tank (11), at least two layers of blades (142) sleeved on the stirring rod (141), a reducer (143) connected to the top of the stirring rod (141), and a motor (144) connected to the reducer (143); wherein The blade assembly (142) includes: a collar (1421) sleeved on the stirring rod (141) and at least two stirring blades (1422) arranged in a circular array on the collar (1421). The reducer (143) is located on top of the tank (11); The motor (144) is mounted on the reducer (143); and The motor (144) is adapted to drive the stirring rod (141) to rotate via the reducer (143) so as to drive each blade group (142) to stir the alkaline solution.

5. The sulfur-containing tail gas treatment equipment for carbon nanotube production as described in claim 4, characterized in that, The processing mechanism (1) also includes a valve (15) that communicates with the bottom of the tank (11).

6. The sulfur-containing tail gas treatment equipment for carbon nanotube production as described in claim 5, characterized in that, The tank (11) is provided with an inspection port; A sealing cap (111) is movably connected to the tank body (11). The sealing cap (111) is adapted to cover the access port to seal the access port.

7. The sulfur-containing tail gas treatment equipment for carbon nanotube production as described in claim 6, characterized in that, The processing mechanism (1) further includes: an inlet pipe (16) connected to the tank (11); wherein The other end of the inlet pipe (16) is adapted to be connected to an infusion device.

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