A light suspended material emulsification process control device

Abstract

The present invention discloses a light suspended material emulsification process control device, comprising a special-shaped hopper, a stirring device, a stirring tank, an emulsification tank, an emulsifying machine, a suspension hopper, a spiral coil, a feeding pump and a circulating emulsification pipeline. A fixed shaft penetrating the top of the emulsification tank is provided in the emulsification tank, the spiral coil is wound around the fixed shaft, an umbrella cover is provided above the interior of the emulsification tank, a material passing gap is left between the arc-shaped outer edge of the umbrella cover body and the inner wall surface of the emulsification tank, the emulsification tank discharge port, the emulsifying machine, the feeding pump and one side of the upper cylindrical tank body are connected in sequence through the circulating emulsification pipeline to form a slurry circulating emulsification loop; the present invention solves the problem that graphene powder prepared by a physical method is difficult to fuse with water, and the emulsification effect is more uniform, which creates favorable conditions for the next step of graphene stratification and effectively improves the emulsification efficiency.

Description

Technical Field

[0001] The invention relates to an emulsification device, in particular to a control device for an emulsification process of a light suspended material used for preparing graphene by a physical method. Background Art

[0002] Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms, which has excellent optical, electrical, mechanical and other properties. The current large-scale preparation methods of graphene are mainly redox method and liquid phase exfoliation method. Among them, the liquid phase exfoliation method has the disadvantages of being time-consuming, unclean, low yield of single-layer graphene, serious sheet agglomeration, and the need to further remove the stabilizer. Although the redox method is simple and easy to operate, efficient and low-cost, and can be mass-produced, graphene itself has a very large specific surface area and is very prone to irreversible agglomeration, which reduces the properties of graphene. During the production process, the integrity of the graphene structure is easily destroyed, which in turn affects the atomic properties of graphene. The product structure is defective, small in size, and prone to environmental pollution.

[0003] The emulsification device is one of the main equipment for further exfoliation and stratification of graphene powder. Because the graphene powder prepared by physical method is different from the graphene prepared by redox method, it does not have oxygen-containing functional groups. In addition, due to its light weight and poor wettability, the method of directly mixing the powder with water into the emulsifier for emulsification or stirring it and then pouring it into the emulsifier for emulsification is inefficient and the subsequent stratification effect is not ideal. Based on this, there is an urgent need for an emulsification control device suitable for the physical preparation of graphene. Summary of the Invention

[0004] In view of this, the main purpose of the present invention is to provide a light suspended material emulsification process control device that can effectively improve the emulsification efficiency and has a good emulsification effect.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] 1. A light suspended material emulsification process control device, characterized in that it includes a special-shaped hopper, a stirring device, a stirring tank, an emulsifying tank, an emulsifying machine, a suspension hopper, a spiral coil, a feeding pump and a circulating emulsification pipeline, the stirring device includes a stirring motor, a stirring shaft and a stirring blade installed on the stirring shaft, the stirring blade consists of a first stirring blade and a second stirring blade, the diameter of the first stirring blade is equal to the radius of the second stirring blade, the number of the second stirring blades is 2, the stirring tank is composed of a lower conical tank body and an upper cylindrical tank body, The first stirring blade is arranged at the lower part of the upper cylindrical tank body, and the second stirring blades are all arranged in the lower conical tank body. The first discharge port at the lower end of the special-shaped hopper is connected to one side of the upper cylindrical tank body through a discharge pipe. The other side of the upper cylindrical tank body is connected to one end of an external circulating emulsification pipeline. A powder inlet is opened on the upper side of the special-shaped hopper. The bottom discharge port of the lower conical tank body is connected to the middle part of the upper end face of the emulsification tank through a connecting pipe. A fixed shaft passing through the top of the emulsification tank is provided in the emulsification tank. The upper end of the fixed shaft is provided with a connecting pipe extending into the lower conical tank body. Its penetration end is welded and fixed to the inner wall surface of the connecting pipe, and a number of through holes are evenly spaced around the top of the tube body of the connecting pipe. The spiral coil is wound around a fixed shaft, one end of the spiral coil is fixedly connected to the bottom discharge port of the emulsification tank, and the other end is communicated with the second discharge port on one side of the lower end surface of the suspension hopper. An umbrella cover is provided above the interior of the emulsification tank, and the umbrella cover is sleeved with a fixed shaft, and the top arc surface of the umbrella cover is in contact with the lower end surface of the connecting pipe. A material passing gap is left between the arc-shaped outer edge of the umbrella cover body and the inner wall surface of the emulsification tank. The emulsifier is arranged on the lower side of the emulsification tank. The tank discharge port, emulsifier, feed pump and one side of the upper cylindrical tank body are connected in sequence through a circulating emulsification pipeline to form a slurry circulation emulsification circuit. The suspended hopper is composed of a rectangular receiving hopper, an inverted cone plate and a float. The middle of the receiving hopper is opened and a fixed shaft is sleeved. Floats are provided on both sides of the receiving hopper. An inverted cone plate is installed on the upper inclined end of the float. The second discharge port on one side of the receiving hopper is connected to the spiral coil, and also includes a pair of roller blade wheels. The pair of roller blade wheels are provided at the discharge end of the special-shaped hopper, and the interval between the opposite blade wheels is 2mm-4mm.

[0007] As a preferred technical solution, the slope of the umbrella cover is 45°-60°, and the width of the material gap is 10mm-20mm. The setting of the umbrella cover can effectively improve the fluidity of the material liquid during the emulsification process and reduce the occurrence of the material liquid hanging on the wall.

[0008] As a preferred technical solution, the spiral coil is a plastic spiral coil, and the interior of the float is a hollow cavity filled with air.

[0009] Furthermore, during the actual continuous emulsification process, the suspension hopper slides up and down along the fixed axis and floats on the liquid level in the emulsification tank, while supporting the spiral coil immersed in the liquid along the fixed axis, thereby preventing the liquid from stacking in the spiral coil.

[0010] As a preferred technical solution, it also includes a fastening joint, which is connected to the communicating end of the second discharge port and the spiral coil;

[0011] Furthermore, the fastening joint may be a pagoda joint, which is used to prevent the coil from falling off due to excessive pressure when excessive powder enters the spiral coil through the receiving hopper.

[0012] Furthermore, the setting of the roller blade wheel can effectively prevent the bridge phenomenon that occurs in the special-shaped hopper during the feeding process due to the lightness of the graphene powder.

[0013] As a preferred technical solution, during the emulsification injection stage, the emulsification tank is filled with pure water, and its highest water level is 10cm-20cm lower than the material gap.

[0014] Furthermore, in actual application, the volume ratio of the added amount of graphene powder to the pure water in the emulsification tank is 95%-99%:5%-1%.

[0015] As a preferred technical solution, the open ends on both sides of the upper cylindrical tank body are arranged on the wall of the tank body above the first stirring blade, and the open end on one side connected to the discharge pipe is higher than the open end of the external circulating emulsification pipeline.

[0016] As a preferred technical solution, it also includes a manual valve, a second solenoid valve, a first three-way pipe and a second three-way pipe. The manual valve is connected below the discharge port, the first three-way pipe is arranged on the circulating emulsification pipeline between the manual valve and the emulsifier, the second three-way pipe is connected to the circulating emulsification pipeline between the emulsifier and the feeding pump, and the second solenoid valve is connected to the first three-way pipe and the second three-way pipe respectively through the material pipe.

[0017] Furthermore, an observation port is provided on one side of the bottom of the emulsification tank body above the discharge port, and the observation port is used to observe the viscosity of the liquid at the bottom of the emulsification tank.

[0018] As a preferred technical solution, 6 to 10 through holes are evenly spaced around the top of the connecting pipe, and the diameter of the through holes is 20 mm to 30 mm.

[0019] As a preferred technical solution, a drive motor is provided on one side of the emulsifier, and the output shaft of the drive motor is connected to the input shaft of the emulsifier through a transmission belt.

[0020] As a preferred technical solution, a finished slurry outlet is opened on one side of the circulating emulsification pipeline above the feed pump, and its outlet end is blocked by a first solenoid valve.

[0021] The present invention has the following beneficial effects: 1. It solves the problem of graphene powder prepared by physical methods having difficulty fusing with water, and achieves a more uniform emulsification effect, creating favorable conditions for the next step of graphene layering; 2. It shortens the emulsification time from 36 hours to 16 hours, effectively improving emulsification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a light suspended material emulsification process control device of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the medium mixing tank;

[0024] Figure 3 for Figure 1 Schematic diagram of the middle umbrella cover structure;

[0025] Figure 4 for Figure 1 Schematic diagram of the structure of the suspension hopper;

[0026] Figure 5 for Figure 1 Schematic diagram of the emulsification tank structure in medium and high liquid level states;

[0027] Figure 6 for Figure 1 Schematic diagram of the emulsification tank structure in medium and low liquid level states.

[0028] In the figure: 10-special-shaped hopper, 11-powder inlet, 12-first discharge port, 20-stirring device, 21-stirring motor, 22-stirring shaft, 23-stirring blade, 23-1-first stirring blade, 23-2-second stirring blade, 30-stirring tank, 31-lower conical tank body, 32-upper cylindrical tank body, 40-emulsifying tank, 41-discharge port, 50-emulsifying machine, 60-suspension hopper, 61-receiving hopper, 62-anti-conical plate, 63-floating body, 64- Second discharge port, 70-spiral coil, 80-feeding pump, 90-circulating emulsification pipeline, 100-discharge pipe, 110-connecting pipe, 111-through hole, 120-fixed shaft, 130-umbrella cover, 131-feeding gap, 140-drive motor, 150-transmission belt, 160-first solenoid valve, 170-fastening joint, 180-roller blade wheel, 190-manual valve, 200-second solenoid valve, 210-first three-way pipe, 220-second three-way pipe. DETAILED DESCRIPTION

[0029] In order to provide a further understanding and appreciation of the structural features and effects achieved by the present invention, a detailed description is provided with reference to preferred embodiments and accompanying drawings as follows:

[0030] The embodiment of the present invention provides a light suspended material emulsification process control device, such as Figure 1-6As shown, the emulsification process control device includes a special-shaped hopper 10, a stirring device 20, a stirring tank 30, an emulsifying tank 40, an emulsifying machine 50, a suspension hopper 60, a spiral coil 70, a feeding pump 80 and a circulating emulsification pipeline 90. The stirring device 20 includes a stirring motor 21, a stirring shaft 22 and a stirring blade 23 installed on the stirring shaft 22. The stirring blade 23 consists of a first stirring blade 23-1 and a second stirring blade 23-2. The diameter of the first stirring blade 23-1 is equal to the radius of the second stirring blade 23-2. The number of the second stirring blades 23-2 is 2. The stirring tank 30 is composed of a lower conical tank body 31 and an upper cylindrical tank body 32. The first stirring blade 23-1 is equal to the radius of the second stirring blade 23-2. The number of the second stirring blades 23-2 is 2. The stirring blade 23-1 is arranged at the lower part of the upper cylindrical tank body 32, and the second stirring blade 23-2 is arranged in the lower conical tank body 31. The first discharge port 12 at the lower end of the special-shaped hopper 10 is connected to one side of the upper cylindrical tank body 32 through the discharge pipe 100. The other side of the upper cylindrical tank body 32 is connected to one end of the circulating emulsification pipeline 90. A powder inlet 11 is opened on the upper side of the special-shaped hopper 10. The bottom discharge port of the lower conical tank body 31 is connected to the middle part of the upper end surface of the emulsification tank 40 through the connecting pipe 110. A fixed shaft 120 is provided in the emulsification tank 40, which passes through the top of the emulsification tank 40. The upper end of the fixed shaft 120 is penetrated by the connecting pipe 110 and extends into the lower conical tank body 31. Its penetration end is welded and fixed to the inner wall surface of the connecting pipe 110, and a plurality of through holes 111 are evenly spaced around the top of the tube body of the connecting pipe 110. The spiral coil 70 is wound around a fixed shaft 120. One end of the spiral coil 70 is fixedly connected to the bottom discharge port 41 of the emulsification tank 40, and the other end is communicated with the second discharge port 64 on the lower end surface of the suspension hopper 60. An umbrella cover 130 is provided above the interior of the emulsification tank 40. The umbrella cover 130 is sleeved with the fixed shaft 120, and its top arc surface is in contact with the lower end surface of the connecting pipe 110. A material passing gap 131 is left between the arc-shaped outer edge of the umbrella cover 130 cover body and the inner wall surface of the emulsification tank 40. The emulsifier 50 is arranged on the lower side of the emulsification tank 40. The discharge port 41 of the chemical tank, the emulsifier 50, the feed pump 80 and one side of the upper cylindrical tank body 32 are connected in sequence through the circulating emulsification pipeline 90 to form a slurry circulation emulsification circuit. The suspension hopper 60 is composed of a rectangular receiving hopper 61, an anti-conical plate 62 and a float 63. The middle of the receiving hopper 61 is opened and a fixed shaft 120 is sleeved. Floats 63 are provided on both sides of the receiving hopper 61. The upper inclined end of the float 63 is equipped with an anti-conical plate 62. The second discharge port 64 on one side of the receiving hopper 61 is connected to the spiral coil 70. It also includes a pair of roller blade wheels 180. The pair of roller blade wheels 180 are provided at the discharge end of the special-shaped hopper 10, and the interval between the opposite blade wheels is 2mm-4mm.

[0031] In this embodiment, the slope of the umbrella cover 130 is 45°-60°, and the width of the material passing gap 130 is 10mm-20mm.

[0032] In this embodiment, the spiral coil 70 is a plastic spiral coil, and the interior of the float 63 is a hollow cavity filled with air.

[0033] In this embodiment, a fastening joint 170 is further included. The fastening joint 170 is connected to the communicating end between the second discharge port 64 and the spiral coil 70 .

[0034] In this embodiment, during the emulsification and liquid injection stage, pure water is injected into the emulsification tank 40 , and the highest water level is 10 cm to 20 cm lower than the material gap.

[0035] In this embodiment, the open ends on both sides of the upper cylindrical tank body 32 are arranged on the wall of the tank body above the first stirring blade 23 - 1 , and the open end on one side connected to the discharge pipe 100 is located higher than the open end of the external circulating emulsification pipeline 90 .

[0036] In this embodiment, it also includes a manual valve 190, a second solenoid valve 200, a first three-way pipe 210 and a second three-way pipe 220. The manual valve 19 is connected below the discharge port 41. The first three-way pipe 210 is provided on the circulating emulsification pipeline 90 between the manual valve 190 and the emulsifier 50. The second three-way pipe 220 is connected to the circulating emulsification pipeline 90 between the emulsifier 50 and the feeding pump 80. The second solenoid valve 200 is connected to the first three-way pipe 210 and the second three-way pipe 220 respectively through the material pipe.

[0037] In this embodiment, 6 to 10 through holes 111 are evenly spaced around the top of the connecting tube 110 , and the diameter of the through holes 111 is 20 mm to 30 mm.

[0038] In this embodiment, a driving motor 140 is provided on one side of the emulsifying machine 50 , and an output shaft of the driving motor 140 is connected to an input shaft of the emulsifying machine 50 via a transmission belt 150 .

[0039] In this embodiment, a finished slurry outlet is opened on one side of the circulating emulsification pipeline 90 above the feed pump 80, and its outlet end is blocked by a first solenoid valve 160.

[0040] The specific working principle of this device is as follows: during the first round of emulsification, the water injection amount in the emulsification tank 40 is determined according to a certain ratio, and graphene powder is poured into the special-shaped hopper 10. At the same time, the feeding pump 80 is turned on to inject a certain amount of pure water into the circulating emulsification pipeline 90. After passing through the roller blade wheel 180, the graphene powder passes through the upper cylindrical tank body 32 and the lower conical tank body 31 in sequence. The graphene powder in the upper cylindrical tank body 32 contacts the pure water pumped into it through the circulating emulsification pipeline 90. The first stirring blade 23-1 and the second stirring blade 23-2 are used to stir and mix the graphene powder. Due to the poor wettability of the graphene powder, the powder and the pure water in the liquid are clearly layered. The powder is brought into the emulsification tank 40 through the pure water (the powder falls on the cover 130 after passing through the through holes 111 around the top of the connecting tube 110, and floats to the water level surface in the emulsification tank 40 through the material gap 131 through the flushing of the pure water). As the graphene powder floats on the water level surface in the emulsification tank 40, the powder is mixed with the pure water. As the amount of graphene powder accumulated on the upper portion increases, graphene powder and water are continuously injected into the spiral coil 70 through the suspension hopper 60, the manual valve 190 is opened, the second solenoid valve 200 is closed, and the graphene powder and water are discharged to the emulsifier 50 through the circulating emulsification pipeline 90 for emulsification, and the emulsified liquid is continuously pumped into the upper cylindrical tank 32 through the feeding pump 80. After another round of emulsification, there is no need to inject pure water into the emulsification circulation pipeline 90; after another round of emulsification, the liquid is discharged into the upper column The graphene powder continues to be in contact with the continuously injected graphene powder in the shaped tank body 32, and is stirred and mixed by the first stirring blade 23-1 and the second stirring blade 23-2. The emulsification cycle lasts for 16h-18h until the liquid level in the emulsification tank reaches a low liquid level state. The second solenoid valve 200 and the first solenoid valve 160 are opened. After the emulsification is completed, the material liquid is discharged through the finished slurry outlet on the side of the circulating emulsification pipeline 90 above the feed pump 80 and sent to the next homogenization equipment.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A light suspended material emulsification process control device, characterized in that: The invention comprises a special-shaped hopper, a stirring device, a stirring tank, an emulsifying tank, an emulsifying machine, a suspension hopper, a spiral coil, a feeding pump and a circulating emulsifying pipeline. The stirring device comprises a stirring motor, a stirring shaft and a stirring blade installed on the stirring shaft. The stirring blade consists of a first stirring blade and a second stirring blade. The diameter of the first stirring blade is equal to the radius of the second stirring blade. The number of the second stirring blades is 2. The stirring tank is composed of a lower conical tank body and an upper cylindrical tank body. The first stirring blade is arranged below the inner part of the upper cylindrical tank body. The second stirring blades are all arranged in the lower conical tank body, the first discharge port at the lower end of the special-shaped hopper is connected to one side of the upper cylindrical tank body through a discharge pipe, the other side of the upper cylindrical tank body is connected to one end of an external circulating emulsification pipeline, a powder inlet is opened on the upper side of the special-shaped hopper, the bottom discharge port of the lower conical tank body is connected to the middle part of the upper end face of the emulsification tank through a connecting pipe, a fixed shaft passing through the top end of the emulsification tank is provided in the emulsification tank, the upper end of the fixed shaft is penetrated by a connecting pipe and extends into the lower conical tank body, and its penetrated end is welded to the inner wall surface of the connecting pipe. The top of the connecting pipe is fixed, and a plurality of through holes are evenly spaced around the top of the tube body of the connecting pipe. The spiral coil is wound around a fixed shaft. One end of the spiral coil is fixedly connected to the bottom discharge port of the emulsification tank, and the other end is communicated with the second discharge port on one side of the lower end surface of the suspension hopper. An umbrella cover is provided above the interior of the emulsification tank, and the umbrella cover is sleeved with a fixed shaft, and the top arc surface of the umbrella cover is in contact with the lower end surface of the connecting pipe. A gap for passing the material is left between the arc-shaped outer edge of the umbrella cover body and the inner wall surface of the emulsification tank. The emulsifier is arranged on the lower side of the emulsification tank. The discharge port of the emulsification tank, the emulsification tank and the emulsification tank are connected. The chemical machine, the feeding pump and one side of the upper cylindrical tank are connected in sequence through a circulating emulsification pipeline to form a slurry circulating emulsification circuit. The suspension hopper is composed of a rectangular receiving hopper, an inverted cone plate and a float. The middle of the receiving hopper is opened and a fixed shaft is sleeved. Floats are provided on both sides of the receiving hopper. An inverted cone plate is installed on the upper inclined end of the float. The second discharge port on one side of the receiving hopper is connected to the spiral coil, and also includes a pair of roller blade wheels. The pair of roller blade wheels are provided at the discharge end of the special-shaped hopper, and the interval between the opposite blade wheels is 2mm-4mm.

2. The light suspended material emulsification process control device according to claim 1, characterized in that: The slope of the umbrella cover surface is 45°-60°, and the width of the material passing gap is 10mm-20mm.

3. The light suspended material emulsification process control device according to claim 1, characterized in that: The spiral coil is a plastic spiral coil, and the interior of the float is a hollow cavity filled with air.

4. The light suspended material emulsification process control device according to claim 3, characterized in that: It also includes a fastening joint, which is connected between the second discharge port and the communicating end of the spiral coil.

5. The light suspended material emulsification process control device according to claim 1, characterized in that: During the emulsification injection stage, the emulsification tank is filled with pure water, and the highest water level is 10 cm to 20 cm lower than the material gap.

6. The light suspended material emulsification process control device according to claim 1, characterized in that: The open ends on both sides of the upper cylindrical tank body are arranged on the wall of the tank body above the first stirring blade, and the open end on one side connected to the discharge pipe is higher than the open end of the external circulating emulsification pipeline.

7. The light suspended material emulsification process control device according to claim 1, characterized in that: It also includes a manual valve, a second solenoid valve, a first three-way pipe and a second three-way pipe. The manual valve is connected below the discharge port. The first three-way pipe is arranged on the circulating emulsification pipeline between the manual valve and the emulsifier. The second three-way pipe is connected to the circulating emulsification pipeline between the emulsifier and the feeding pump. The second solenoid valve is connected to the first three-way pipe and the second three-way pipe respectively through the material pipe.

8. The light suspended material emulsification process control device according to claim 1, characterized in that: The top of the connecting pipe is provided with 6 to 10 through holes at equal intervals around the pipe body, and the diameter of the through holes is 20 mm to 30 mm.

9. The light suspended material emulsification process control device according to claim 1, characterized in that: A driving motor is provided on one side of the emulsifier, and the output shaft of the driving motor is connected to the input shaft of the emulsifier through a transmission belt.

10. The light suspended material emulsification process control device according to claim 1, characterized in that: A finished product slurry outlet is opened on one side of the circulating emulsification pipeline above the feed pump, and the outlet end is blocked by a first electromagnetic valve.

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