A device for acid washing single-walled carbon nanotubes

Abstract

The utility model relates to carbon nanometer material purification equipment technical field especially relates to a single wall carbon nanotube pickling device for, including the washing tank, the washing tank bottom four corners all are provided with support frame, the washing tank bottom is connected and has the drain pipe of intercommunication. Through setting the hinge's protective cover at the washing tank top, and utilize the buckle plate and the box body edge cooperation fixation, realized the acid -washed process's airtight operation, this design can effectively prevent the strong acid solution in ultrasonic cleaning process because of violent vibration and splash, and the toxic, irritating acid mist is blocked to the outside and escapes, simultaneously, is equipped with the acid mist processing subassembly that is composed of exhaust pipe, gas stop valve, filter box, filter frame and handle, and the acid mist enters filter box through exhaust pipe, is effectively adsorbed or neutralized by the special filter material filled in filter frame, realizes harmless treatment and discharges again, greatly reduces the risk of inhaling harmful gas, guarantees personnel health and laboratory environment safety.

Description

Technical Field

[0001] This utility model relates to the technical field of carbon nanomaterial purification equipment, and in particular to an acid washing device for single-walled carbon nanotubes. Background Technology

[0002] Single-walled carbon nanotubes (SWNTs) have shown great application potential in nanoelectronic devices, composite materials, energy storage, sensors, and biomedicine due to their unique electrical, mechanical, thermal, and optical properties. However, pristine SWNTs prepared by common methods such as chemical vapor deposition (CVD) usually contain a large number of impurities. The presence of these impurities severely degrades the intrinsic properties of SWNTs and limits their application in high-end fields. To obtain high-purity, high-performance SWNTs, acid washing purification is a key step in the preparation process. The acid washing method mainly utilizes the strong oxidizing properties of strong acids to selectively dissolve metal catalyst particles and some amorphous carbon impurities, while causing relatively little structural damage to the carbon nanotubes themselves.

[0003] Currently, traditional pickling operations are usually carried out in open pickling tanks or pickling frames, which poses high safety risks. In particular, strong acids are highly corrosive, and improper handling can easily cause burns to the skin and eyes. Furthermore, toxic and irritating acid fumes are generated during the pickling process, and open operation can easily lead to acid splashing and acid fumes escaping, posing a serious threat to the health of operators and the laboratory environment.

[0004] Therefore, a device for acid washing of single-walled carbon nanotubes with a safe sealing protection and acid mist purification is developed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing single-walled carbon nanotube pickling process, such as acid splashing, toxic acid mist emission leading to high safety risks, serious environmental pollution, and threats to the health of operators, this utility model provides a single-walled carbon nanotube pickling device with safe sealing protection and acid mist purification.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: a pickling device for single-walled carbon nanotubes, comprising a cleaning tank, with support frames at each of the four corners of the bottom of the cleaning tank, a drain pipe connected to and communicating with the bottom of the cleaning tank, a stop valve installed on the drain pipe, an ultrasonic cleaner installed on the front side of the cleaning tank, a protective cover hinged to the top of the cleaning tank, symmetrically distributed buckles on the front edge of the protective cover, an exhaust pipe connected to and communicating with the upper side of the cleaning tank, a stop valve installed on the exhaust pipe, a filter box installed at the end of the exhaust pipe, a filter frame slidably arranged inside the filter box, and a handle provided on the side of the filter frame.

[0007] More preferably, an observation plate is embedded in the middle of the protective cover.

[0008] More preferably, a rubber strip is provided on the front side of the cleaning tank, and a groove matching the rubber strip is provided on the buckle plate, so that the rubber strip is embedded in the groove.

[0009] More preferably, each corner of the cleaning tank is provided with a positioning post, and a support rod is inserted into each positioning post. The support rods are all provided with a placement plate.

[0010] More preferably, the placement plate has a filter screen structure in the middle.

[0011] More preferably, the drain pipe is connected to a threaded connector at its end.

[0012] Compared with the prior art, this utility model has the following technical effects: 1. By setting a hinged protective cover on the top of the cleaning box and using a buckle plate to fix it to the edge of the box, the acid washing process is made airtight. This design can effectively prevent strong acid solution from splashing due to violent vibration during ultrasonic cleaning and block the outward escape of toxic and irritating acid mist. At the same time, it is equipped with an acid mist treatment component consisting of an exhaust pipe, a gas stop valve, a filter box, a filter frame and a handle. The acid mist enters the filter box through the exhaust pipe and is effectively adsorbed or neutralized by the special filter material filled in the filter frame, achieving harmless treatment before being discharged. This greatly reduces the risk of inhaling harmful gases and protects the health of personnel and the safety of the laboratory environment.

[0013] 2. The bracket structure inside the cleaning box, consisting of positioning columns, support rods, and placement plates, serves as a single unit, facilitating the removal or placement of single-walled carbon nanotubes from or into the cleaning box during loading and unloading. This enables batch and integrated material handling, greatly simplifying the operation process. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional sectional view of the support frame, cleaning box, and protective cover of this utility model.

[0016] Figure 3 This is a three-dimensional sectional view of the exhaust pipe, air stop valve, and filter box components of this utility model.

[0017] Figure 4 This is a three-dimensional sectional view of the positioning column, support rod, and placement plate of this utility model.

[0018] The meanings of the labels in the attached diagram are as follows: 1-Support frame, 2-Cleaning box, 3-Drain pipe, 4-Stop valve, 5-Ultrasonic cleaner, 6-Protective cover, 7-Observation plate, 8-Snap plate, 9-Rubber strip, 10-Exhaust pipe, 11-Stop valve, 12-Filter box, 13-Filter frame, 14-Handle, 15-Positioning post, 16-Support rod, 17-Placement plate, 18-Threaded joint. Detailed Implementation

[0019] The technical solution will be further described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used in this document refer only to the position of the structure shown in the corresponding drawings. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, terms such as "connection" and "linkage" in this application include both direct and indirect connections (linkages).

[0020] Example 1: Please refer to Figures 1-3 A pickling device for single-walled carbon nanotubes includes a cleaning tank 2. Support frames 1 are provided at each of the four corners of the bottom of the cleaning tank 2. A drain pipe 3 is connected to and communicates with the bottom of the cleaning tank 2. A threaded connector 18 is connected to the end of the drain pipe 3 so that it can be connected to an external waste liquid collection tank for directional and leak-free discharge of waste liquid. A stop valve 4 is installed on the drain pipe 3. An ultrasonic cleaner 5 is installed on the front side of the cleaning tank 2. A protective cover 6 is hinged to the top of the cleaning tank 2 to prevent the pickling solution from splashing out. An observation plate 7 is embedded in the middle of the protective cover 6 to facilitate real-time observation of the cleaning process inside the tank by the operator. Symmetrically distributed buckle plates 8 are provided on the front edge of the protective cover 6. When the protective cover 6 is closed, the... The buckle plate 8 fits with the top edge of the cleaning tank 2 to fix the protective cover 6. A rubber strip 9 is provided on the front side of the cleaning tank 2. The buckle plate 8 has a groove that matches the rubber strip 9. The rubber strip 9 is embedded in the groove to fill the tiny gap between the cover and the tank body, forming an effective sealing barrier to prevent acid mist from leaking from the joint between the cover and the tank body. An exhaust pipe 10 is connected and communicated to the upper side of the cleaning tank 2. A gas stop valve 11 is installed on the exhaust pipe 10. A filter box 12 is installed at the end of the exhaust pipe 10. A filter frame 13 is slidably arranged inside the filter box 12. The filter frame 13 can be filled with appropriate adsorbent material according to the type of acid solution used for pickling. A handle 14 is provided on the side of the filter frame 13.

[0021] When using this device, first, open the protective cover 6 on the top of the cleaning tank 2, then place the single-walled carbon nanotube material to be acid-washed into the cleaning tank 2, and add an appropriate amount of acid washing solution. Next, close the protective cover 6. The snap plate 8 on the edge of the protective cover 6 engages with the top edge of the cleaning tank 2, firmly fixing the protective cover 6 to the cleaning tank 2. Simultaneously, the rubber strip 9 is embedded in the groove of the protective cover 6, forming an effective seal to prevent acid mist or solution from escaping from the cover gaps during the cleaning process. Then, start the ultrasonic cleaner 5. The ultrasonic cleaner 5 generates high-frequency vibrations, which are transmitted through the wall of the cleaning tank 2 to the acid washing solution, creating a strong cavitation effect. This effect effectively removes impurities and non-carbon substances from the surface of the single-walled carbon nanotubes, achieving efficient and uniform acid washing. However, during the acid washing process, especially with ultrasonic assistance or when the solution temperature rises, the acid will volatilize irritating and corrosive harmful gases. It is necessary to release these gases to prevent the cleaning tank 2 from escaping. When the internal pressure is too high, the operator opens the gas shut-off valve 11 on the exhaust pipe 10. After opening the gas shut-off valve 11, the harmful gas in the cleaning box 2 is guided to the filter box 12 through the exhaust pipe 10. After the harmful gas enters the filter box 12, it flows through the filter material in the filter frame 13. The filter material effectively removes the harmful components in the exhaust gas through physical adsorption or chemical reaction, so that it is purified to meet the standards before being discharged into the atmosphere. When the filter material is saturated and ineffective, the operator can pull the handle 14 on the outside of the filter frame 13 to slide the filter frame 13 horizontally out of the filter box 12, so as to easily replace or regenerate the internal filter material. Then the filter frame 13 can be pushed back into the filter box 12 for continued use. After the pickling process is completed, the ultrasonic cleaner 5 is turned off and the water shut-off valve 4 on the drain pipe 3 is opened to discharge the used pickling waste liquid from the bottom of the cleaning box 2. After the waste liquid is drained, the protective cover 6 can be opened to take out the cleaned single-wall carbon nanotube material for subsequent water washing, drying and other treatments.

[0022] Example 2: Based on Example 1, please refer to... Figure 4 The cleaning tank 2 has positioning posts 15 at each of its four corners. Each positioning post 15 has a vertically inserted support rod 16. The four support rods 16 are connected to two stacked placement plates 17. The bracket structure formed by the support rods 16 and the placement plates 17 is used to place single-walled carbon nanotubes for easy handling. In addition, the middle of the placement plate 17 is designed with a filter screen structure, allowing acid to flow freely up and down through the mesh, ensuring that the single-walled carbon nanotubes on the placement plate 17 are fully wetted and rinsed by the acid, thus improving the uniformity and efficiency of cleaning.

[0023] When materials need to be loaded or unloaded, the entire bracket structure consisting of support rods 16 and placement plate 17 is removed from the cleaning tank 2. Loading or unloading operations are then carried out in a safe area. After processing, the entire bracket is put back into the cleaning tank 2, so that the four support rods 16 are respectively inserted into the positioning posts 15 at the four corners to ensure its stability. This greatly simplifies the operation process, realizes the overall and batch loading and unloading of materials, and improves the convenience and safety of operation.

[0024] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Therefore, all equivalent changes made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A pickling device for single-walled carbon nanotubes, comprising a cleaning tank (2), wherein support frames (1) are provided at the four corners of the bottom of the cleaning tank (2), a drain pipe (3) is connected and communicated to the bottom of the cleaning tank (2), a stop valve (4) is installed on the drain pipe (3), and an ultrasonic cleaner (5) is installed on the front side of the cleaning tank (2), characterized in that, The top of the cleaning box (2) is hinged with a protective cover (6). The front edge of the protective cover (6) is provided with symmetrically distributed buckle plates (8). The upper side of the cleaning box (2) is connected to and communicates with an exhaust pipe (10). An air stop valve (11) is installed on the exhaust pipe (10). A filter box (12) is installed at the end of the exhaust pipe (10). A filter frame (13) is slidably arranged inside the filter box (12). A handle (14) is provided on the side of the filter frame (13).

2. The acid washing apparatus for single-walled carbon nanotubes according to claim 1, characterized in that, An observation plate (7) is embedded in the middle of the protective cover (6).

3. The acid washing apparatus for single-walled carbon nanotubes according to claim 2, characterized in that, The front side of the cleaning box (2) is provided with a rubber strip (9), and the buckle plate (8) is provided with a groove that matches the rubber strip (9), and the rubber strip (9) is embedded in the groove.

4. The acid washing apparatus for single-walled carbon nanotubes according to claim 3, characterized in that, The cleaning tank (2) is equipped with positioning posts (15) at its internal corners. Each positioning post (15) is fitted with a support rod (16), and the support rods (16) are all fitted with a placement plate (17).

5. The acid washing apparatus for single-walled carbon nanotubes according to claim 4, characterized in that, The middle part of the placement plate (17) is designed with a filter screen structure.

6. The acid washing apparatus for single-walled carbon nanotubes according to claim 5, characterized in that, The drain pipe (3) is connected to a threaded connector (18) at its end.

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