Filter device for preparing graphene by electrochemical method

Abstract

The utility model relates to a filtering device for preparing graphene by an electrochemical method, which comprises a kettle body, a storage cavity, a filter screen and a ball valve, and the kettle body comprises a first barrel coaming, a second barrel coaming and a bottom plate; the first barrel coaming, the second barrel coaming and the bottom plate are fixed to form a kettle body with a hollow upper end and an open front end; the second barrel coaming is located at the front end of the kettle body, an exhaust port is formed in the upper end of the kettle body, an opening is formed in the lower end of the kettle body, the storage cavity is located at the opening in the lower end, the exhaust port and the storage cavity are connected through a hose, the ball valve is located at the top of the storage cavity, the air output is controlled by adjusting the knob opening degree of the ball valve, and bubbles are discharged from the exhaust port. The graphite is separated from the concentrated sulfuric acid, and then the concentrated sulfuric acid is circulated to be mixed with the graphite. The flowability of the solution is improved, so that the graphite in the solution is more fully contacted with the surface of the electrode, and the intercalation effect is improved; the dynamic circulation process environment can reduce the adhesion of the expanded graphite and the electrode in the reaction process and reduce the blockage of the outlet of the gas disc, so that the reaction process is smoother.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filter device, concretely relates to a simple structure, easy to make, can effectively improve the flow circulating effect of the graphene filter device of graphite concentrated sulfuric acid mixed solution of electrochemical method preparation. BACKGROUND

[0002] The prior art is to install a gas disc at the bottom of the reaction kettle, mix and stir high-purity graphite and concentrated sulfuric acid to obtain a mixed solution, and directly pour the mixed solution into the reaction kettle, so that the mixed solution uniformly flows in the reaction kettle by means of pneumatic stirring, and then the mixed solution is electrolyzed by electrodes to obtain expanded graphite.

[0003] In the electrochemical reaction process, the graphite near the electrodes undergoes intercalation reaction, and the solution far from the electrodes hardly reacts; the graphite concentrated sulfuric acid mixed solution is made to flow in the kettle body by means of pneumatic stirring, so that the graphite can contact the electrodes, and the reaction yield is improved; however, as the electrolysis reaction proceeds, the graphite continuously expands, and the volume and viscosity continuously increase, which on the one hand blocks the gas disc outlet, slows down the gas outlet rate, and causes the mixed solution to flow unevenly; on the other hand, the viscous graphite adheres to the surface of the electrode, hindering the intercalation reaction. Both of the above will make the intercalation effect worse, the yield decrease, and the time consumed.

[0004] The utility model relates to a graphene filter device which can make the graphite concentrated sulfuric acid mixed solution circulate in the reaction kettle, make the mixed solution fully contact the platinum electrode, and make the electrolysis reaction more sufficient. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the main purpose of the utility model is to provide a graphene filter device prepared by electrochemical method, which has simple structure, is easy to make, and can effectively improve the flow circulating effect of the graphite concentrated sulfuric acid mixed solution.

[0006] The utility model solves the above technical problems through the following scheme: a graphene filter device prepared by electrochemical method, which comprises a kettle body, a storage cavity, a filter screen and a ball valve.

[0007] The kettle body comprises a first barrel surrounding plate, a second barrel surrounding plate and a bottom plate; the first barrel surrounding plate, the second barrel surrounding plate and the bottom plate are fixed to form a kettle body with an empty upper end and an open front end; the bottom plate is located at the bottom of the kettle body and is perpendicular to the first barrel surrounding plate and the second barrel surrounding plate.

[0008] The second barrel surrounding plate is located at the front end of the kettle body, the upper end is provided with an exhaust port, and the lower end is provided with an opening; the storage cavity is located at the opening at the lower end, and the filter screen is installed between the opening at the lower end of the second barrel surrounding plate and the storage cavity.

[0009] The first barrel baffle is located at the rear end of the kettle body; and the second barrel baffle is located at the front end of the kettle body.

[0010] The ball valve is located at the top of the storage cavity, and the gas outlet amount is controlled by adjusting the knob opening degree of the ball valve, so that the bubbles are discharged from the gas outlet.

[0011] In the embodiment of the utility model, the opening at the lower end of the second barrel baffle and the combination of the storage cavity are provided with screw holes for mounting the filter screen, the filter screen is provided with positioning holes matched with the screw holes, and the filter screen is fixed between the opening at the lower end of the second barrel baffle and the storage cavity through the internal hexagonal cylindrical head screw.

[0012] In the embodiment of the utility model, the first barrel baffle, the second barrel baffle and the bottom plate are all made of 304L stainless steel material.

[0013] In the embodiment of the utility model, the ball valve is perpendicular to the direction of the gas outlet pipe and is connected through the polytetrafluoroethylene hose.

[0014] In the embodiment of the utility model, the top of the storage cavity is in the shape of an isosceles trapezoid.

[0015] The positive progress effect of the utility model lies in that, compared with the common similar technology, the graphene filtering device prepared by the electrochemical method separates the graphite from the concentrated sulfuric acid first, and then recycles the concentrated sulfuric acid and mixes it with the graphite. On the one hand, the solution fluidity is improved, the contact between the graphite in the solution and the electrode surface is more sufficient, and the intercalation effect is improved. On the other hand, the dynamic circulation process environment can reduce the adhesion between the expanded graphite and the electrode in the reaction process, reduce the blockage of the gas disc outlet, and make the reaction process more smooth. The two aspects can effectively improve the yield and reduce the reaction time, and play the role of reducing cost and increasing benefit. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the overall structure schematic diagram of the utility model.

[0017] Figure 2 It is a perspective view of the welding kettle body structure schematic diagram of the utility model.

[0018] Figure 3 It is a sectional view of the storage cavity of the utility model.

[0019] The following is the name corresponding to the label in the utility model:

[0020] Hose 1, flat washer 2, kettle body 3, internal hexagonal cylindrical head screw 4, filter screen 5, sealing ring 6, storage cavity 7, ball valve 8, single head external thread joint 9, upper flange 3-1, first barrel baffle 3-2, bottom plate 3-3, measuring flange 3-4, second barrel baffle 3-5, gas outlet pipe 3-6. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present application are described below in detail with reference to the drawings, so as to illustrate the technical scheme of the present application.

[0022] Figure 1 Fig. 1 is a perspective view of the overall structure of the present application, Figure 2 Fig. 2 is a perspective view of the structure of the welding kettle body of the present application, Figure 3 Fig. 3 is a sectional view of the storage cavity of the present application. As shown in Figures 1-3 The graphene filtration device prepared by the electrochemical method of the present application comprises a kettle body 3, a storage cavity 7, a filter screen 5 and a ball valve 8. The kettle body 3 comprises a first barrel surrounding plate 3-2, a second barrel surrounding plate 3-5 and a bottom plate 3-3. The first barrel surrounding plate 3-2, the second barrel surrounding plate 3-5 and the bottom plate 3-3 are fixed to form a kettle body with an empty upper end and an open front end. The bottom plate is located at the bottom of the kettle body and is perpendicular to the barrel surrounding plate 1 and the barrel surrounding plate 3-5.

[0023] The second barrel surrounding plate 3-5 is located at the front end of the kettle body, and an exhaust port 3-6 is arranged at the upper end of the second barrel surrounding plate 3-5, and an opening is arranged at the lower end. The storage cavity is located at the opening at the lower end, and a filter screen 5 is arranged between the opening at the lower end of the second barrel surrounding plate 3-5 and the storage cavity 7.

[0024] The first barrel surrounding plate 3-2 is located at the rear end of the kettle body 3, and the second barrel surrounding plate 3-5 is located at the front end of the kettle body 3. An exhaust port 3-6 is arranged at the upper end of the second barrel surrounding plate 3-5, and a hose 1 is connected between the exhaust port 3-6 and the storage cavity 7.

[0025] The ball valve 8 is located at the top of the storage cavity 7, and the gas output is controlled by adjusting the knob opening of the ball valve 8, so that the gas bubbles are discharged from the exhaust port 3-6.

[0026] Screw holes for mounting the filter screen 5 are arranged at the joint between the opening at the lower end of the second barrel surrounding plate 3-5 and the storage cavity 7, and positioning holes matched with the screw holes are arranged on the filter screen 5. The filter screen 5 is fixed between the opening at the lower end of the second barrel surrounding plate 3-5 and the storage cavity 7 by means of an internal hexagonal cylindrical head screw 4. In the specific implementation process, a flat washer 2 is arranged between the screw head of the internal hexagonal cylindrical head screw 4 and the filter screen 5.

[0027] The first barrel surrounding plate 3-2, the second barrel surrounding plate 3-5 and the bottom plate 3-3 are all made of 304L stainless steel.

[0028] The ball valve 8 is perpendicular to the direction of the gas outlet pipe and is connected by a polytetrafluoroethylene hose.

[0029] In the specific implementation process of the present application, the top shape of the storage cavity 7 can be an isosceles trapezoid as shown in Figure 1 ​

[0030] In a specific embodiment of this utility model, the barrel surround plate 3-2, the barrel surround plate 3-5, and the bottom plate 3-3 are fixed by welding.

[0031] The specific working process of this utility model is as follows: First, connect the polytetrafluoroethylene hose and ball valve at the single-ended external thread connector 9. Turn the ball valve clockwise to form a sealed cavity. Pour the graphite-sulfuric acid mixture down the first barrel's side plate 3-1 until it reaches 5cm below the exhaust pipe 3-6, then stop adding. Turn the ball valve counterclockwise to connect the storage chamber 7 with the heat exchanger (the heat exchanger is an external component and is not shown in the figure) to form a circuit. The mixture flows from the opening of the second barrel's side plate 3-5 to the filter screen 5. The graphite remains inside the welding vessel, and the sulfuric acid flows into the storage chamber 7. After storing a certain amount, it flows out from the single-ended external thread connector 9.

[0032] Sulfuric acid flows along the PTFE flexible tube to the heat exchanger, is cooled by the heat exchanger, and then flows back to the welding vessel 3 through the pipeline, completing one cycle. The circulation flow can be controlled by adjusting the ball valve, and when used in conjunction with ball valve 8, the air intake during the circulation process can be controlled to reduce bubble generation and make the flow smoother.

[0033] In practice, this filtration device is used in conjunction with a diaphragm pump.

[0034] This invention first separates graphite from concentrated sulfuric acid, then recycles the concentrated sulfuric acid to mix with the graphite. On one hand, this improves the fluidity of the solution, allowing for more thorough contact between the graphite and the electrode surface, thus enhancing the intercalation effect. On the other hand, the dynamic circulation environment reduces the adhesion of expanded graphite to the electrode during the reaction and minimizes blockage at the gas tray outlet, making the reaction process smoother. Both aspects effectively increase yield and shorten reaction time, resulting in cost reduction and efficiency improvement.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. An electrochemical method for the preparation of graphene filtration device, characterized by: The graphene filtering device prepared by the electrochemical method comprises a kettle body, a storage cavity, a filter screen and a ball valve, The kettle body comprises a first barrel surrounding plate, a second barrel surrounding plate and a bottom plate; the first barrel surrounding plate, the second barrel surrounding plate and the bottom plate are fixed to form a kettle body with an empty upper end and an open front end; the bottom plate is located at the bottom of the kettle body and is perpendicular to the first barrel surrounding plate and the second barrel surrounding plate; The second barrel surrounding plate is located at the front end of the kettle body, and an exhaust port is arranged at the upper end of the second barrel surrounding plate, and an opening is arranged at the lower end of the second barrel surrounding plate; the storage cavity is located at the opening at the lower end of the second barrel surrounding plate; a filter screen is arranged between the opening at the lower end of the second barrel surrounding plate and the storage cavity, The first barrel surrounding plate is located at the rear end of the kettle body; the second barrel surrounding plate is located at the front end of the kettle body; a hose is arranged between the exhaust port and the storage cavity, The ball valve is located at the top of the storage cavity; the gas outlet amount is controlled by adjusting the knob opening of the ball valve; and the gas bubbles are discharged from the exhaust port.

2. The electrochemical method of claim 1, wherein: Screw holes for mounting the filter screen are arranged at the joint between the opening at the lower end of the second barrel surrounding plate and the storage cavity; positioning holes matched with the screw holes are arranged on the filter screen; and the filter screen is fixed between the opening at the lower end of the second barrel surrounding plate and the storage cavity by means of a hexagonal socket head screw.

3. The electrochemical method of claim 1, wherein: The first barrel surrounding plate, the second barrel surrounding plate and the bottom plate are made of 304L stainless steel.

4. The electrochemical method of claim 1, wherein: The ball valve is perpendicular to the direction of the gas outlet pipe and is connected by a polytetrafluoroethylene hose.

5. The electrochemical method of claim 1, wherein: The top of the storage cavity is in the shape of an isosceles trapezoid.

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