CN215905857U

CN215905857U - Graphene microwave method preparation device

Info

Publication number: CN215905857U
Application number: CN202121796487.0U
Authority: CN
Inventors: 冯国通; 孙昭; 王俊卿
Original assignee: Individual
Current assignee: Qingdao Maiwei Microwave Chemical Equipment Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-02-25
Anticipated expiration: 2031-08-03

Abstract

The utility model relates to a graphene microwave preparation device, which comprises: a feeding section; a supply pipeline connected with the supply part; the discharge end of the feeding pipeline extends into the reaction cavity; at least one microwave generator for supplying microwaves to the reaction chamber body for heating the reaction chamber body; the first rotary connecting assembly is connected with the reaction cavity body and the feeding pipeline; the negative pressure structure is provided with a negative pressure channel, and one end of the negative pressure channel is communicated with the reaction cavity body; the second rotary connecting assembly is connected with the reaction cavity body and the negative pressure channel; the rotary power part is used for providing rotary power for the first rotary connecting assembly so as to enable the reaction cavity body to rotate relative to the feeding pipeline and the negative pressure channel; and the discharge pipeline is communicated with the other end of the negative pressure channel. According to the utility model, the microwave method can be utilized to heat the heated materials in a rotating manner, the heating uniformity is good, the materials can be fully mixed and reacted in the rotating process, and the graphene preparation efficiency is improved.

Description

Graphene microwave method preparation device

Technical Field

The utility model belongs to the technical field of graphene preparation, and particularly relates to a graphene microwave preparation device.

Background

The excellent performance and wide application prospect of the graphene greatly promote the rapid development of the graphene preparation technology. The more mainstream method for preparing graphene is a graphite oxide reduction method, and the specific operation process comprises the steps of firstly oxidizing graphite into graphite oxide by using strong oxidizing agents such as concentrated sulfuric acid, concentrated nitric acid and potassium permanganate, wherein in the oxidation process, oxygen-containing functional groups are inserted among graphite layers, so that the distance between the graphite layers is increased, then, after ultrasonic treatment is carried out for a period of time, single-layer or multi-layer graphene oxide can be formed, then, the graphene oxide is reduced into graphene by using strong reducing agents such as hydrazine hydrate and sodium borohydride, and the graphene oxide powder can also be prepared into powder by using the graphite oxide and carrying out high temperature of 1000 ℃.

The graphene is prepared mainly through interaction between chemical substances and a strong oxidant or reducing agent by adopting the graphite oxide reduction method, the chemical substances are toxic or have strong oxidizing property in the preparation process, damage can be caused to the health of a human body, multiple steps of continuous heating and reduction are needed in the preparation process, the heating process is long, the reaction of heated materials is insufficient, and the preparation efficiency of the graphene is reduced.

Disclosure of Invention

The utility model aims to provide a graphene microwave preparation device which can be used for heating a heated material by a microwave method through rotation, is good in heating uniformity, and can be used for fully mixing and reacting the material in the rotation process, so that the graphene preparation efficiency is improved.

In order to solve the technical problems, the utility model provides the following technical scheme for solving the problems:

the application relates to a graphite alkene microwave method preparation facilities, its characterized in that includes:

a supply portion for supplying a material to be heated;

a supply duct connected to the supply portion;

the discharge end of the feeding pipeline extends into the reaction cavity body;

at least one microwave generator for providing microwaves to the reaction chamber body for heating the reaction chamber body;

the first rotary connecting assembly is connected with the reaction cavity body and the feeding pipeline;

the negative pressure structure is provided with a negative pressure channel, and one end of the negative pressure channel is communicated with the reaction cavity body;

a second rotary connection assembly connecting the reaction chamber body and the negative pressure channel;

a rotary power part for providing rotary power to the first rotary connection assembly to rotate the reaction chamber body relative to the supply pipeline and the negative pressure channel;

and the discharge pipeline is communicated with the other end of the negative pressure channel.

In the present application, the supply portion includes:

a hopper bin;

the feeding machine is connected with the discharge hole of the hopper bin, and the output end of the feeding machine is communicated with the feeding end of the feeding pipeline;

and the blowing fan is used for blowing the material to be heated at the feeding end into the reaction cavity body.

In the application, the graphene microwave preparation device further comprises a shell for coating the periphery of the reaction cavity body;

the first rotating coupling assembly includes:

the first connecting piece is provided with an inner ring surface and an outer ring surface which rotate relatively, and the inner ring surface of the first connecting piece is connected and fixed with the outer side wall of the feeding pipeline;

the first connecting pipe is positioned outside the feeding pipeline and is connected with the outer ring surface of the first connecting piece, the rotary power part and the reaction cavity body;

a first sealing element having an inner annular surface and an outer annular surface which rotate relative to each other, the outer annular surface of the first sealing element being fixedly connected to the housing, the inner annular surface of the first sealing element being connected to an outer sidewall of the first connecting pipe;

the second rotating coupling assembly includes:

the second connecting piece is provided with an inner ring surface and an outer ring surface which rotate relatively, and the inner ring surface of the second connecting piece is connected and fixed with the outer side wall of the negative pressure channel;

the second connecting pipe is communicated with the reaction cavity body and the negative pressure channel and is connected with the outer ring surface of the second connecting piece;

and the second sealing element is provided with an inner annular surface and an outer annular surface which rotate relatively, the outer annular surface of the second sealing element is fixedly connected with the shell, and the inner annular surface of the second sealing element is connected with the outer side wall of the second connecting pipe.

In this application, the reaction chamber body with be provided with the heat preservation between the casing, just the heat preservation with the clearance has between the lateral wall of reaction chamber body.

In this application, the reaction chamber body is the high temperature resistant ceramic material of wave transmission.

In this application, when the quantity of at least one microwave generator is a plurality of, a plurality of microwave generator is along the circumference lateral wall of casing encircles the setting on the casing.

In the present application, the housing is a polyhedral structure.

In the present application, the rotary power section includes:

a power transmission assembly for drivingly rotating the first rotary connection assembly;

and an output shaft of the driving motor is connected with the power transmission assembly.

In the present application, a feed valve is provided on the feed conduit; and a discharge valve is arranged on the discharge pipeline.

In this application, the feed valve with the bleeder valve is automatically controlled sealed ball valve respectively.

The graphene microwave preparation device provided by the utility model has the following beneficial effects and advantages:

(1) the materials to be heated enter the reaction cavity through the feeding part and the feeding pipeline, the rotation power part can provide rotation power to drive the reaction cavity to rotate relative to the feeding pipeline and the negative pressure channel, and the at least one microwave generator heats the reaction cavity and heats the materials to be heated in the reaction cavity, so that the materials to be heated are fully mixed, uniformly heated and fully reacted due to the rotation of the reaction cavity while being heated, the reaction speed is improved, the preparation time of graphene is shortened, and the preparation efficiency of graphene is improved;

(2) continuous and batch graphene preparation is realized along with continuous feeding of the feeding part;

(3) the whole preparation device is sealed during heating, does not generate substances harmful to human bodies, ensures personal safety and is environment-friendly.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments of the present invention or the prior art will be briefly described below, and it is obvious that the drawings described below are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a structural diagram of an embodiment of a graphene microwave method preparation apparatus according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged view of a portion B in fig. 1.

Reference numerals:

100-a feeding section; 110-hopper bin; 120-a feeder; 130-a feeding motor; 140-a blowing motor; 150-feeding pipe;

200-a supply conduit; 210-a feed valve; 210' -a discharge valve;

300-a first rotating link assembly; 310-a first connector; 320-a first connection tube; 330-a first seal;

300' -a second rotating link assembly; 310' -a second connector; 320' -a second connecting tube; 330' -a second seal;

400-a rotary power part;

500-a reaction chamber; 510-a reaction chamber body; 520-a housing; 530-insulating layer;

600-a microwave generator;

700-negative pressure structure; 710-a negative pressure channel; 720-negative pressure pumping power device;

p1, P2-metal protective tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In order to solve the problem that the reaction speed is influenced and the graphene preparation efficiency is influenced by uneven heating of materials to be heated by utilizing a microwave method, the application relates to a graphene microwave method preparation device.

Referring to fig. 1, a structural diagram of a graphene microwave method manufacturing apparatus is shown.

The microwave preparation structure includes a supply part 100, a supply pipe 200, a reaction chamber body 510, at least one microwave generator 600, a first rotary connection assembly 300, a negative pressure structure 700, a second rotary connection assembly 300', a rotary power part 400, and a discharge pipe (not shown).

The supply portion 100 is used to supply a material to be heated, which is a chemical raw material for preparing graphene.

The supply line 200 extends into the reaction chamber body 510, and the heated material enters the reaction chamber body 510 through the supply line 200, and is heated, mixed, and reacted in the reaction chamber body 510.

In the present application, the feeding part 100 includes a hopper bin 110, a feeder, and a blower 140.

The hopper 110 is vertically arranged and has a cover, the discharge port of the hopper 110 is hermetically fixed on the feeder, and the output end of the feeder is communicated with the feeding end of the feeding pipeline 200.

The feeder comprises a feeder 120, a feeding pipe 150 and a feeding motor 130, wherein the feeder 120 is driven by the feeding motor 130 to realize the quantitative feeding function of the material, specifically, the lower end of the hopper bin 110 is hermetically fixed on the feeder 120, and the lower end of the feeder 120 is hermetically connected with the feeding pipe 150.

The feeding pipe 150 is in the form of a tee, and includes a first connection pipe, a second connection pipe, and a third connection pipe, which are communicated with each other.

The free end of the first connecting pipe is hermetically connected with the lower end of the feeder 120, the second connecting pipe is connected with the blowing fan 140, and the third connecting pipe is connected with the supply conduit 200.

When the reaction chamber is used, the material to be heated is placed in the hopper bin 110, the rotation number of the feeder 120 is set, the feeder 120 is driven by the feeding motor 130 to send the material to be heated in the hopper bin 110 into the first connecting pipe, after the rotation number of the feeder 120 is reached, the feeding motor 130 stops operating, the blowing fan 140 operates at the moment, and the material to be heated is blown into the reaction chamber body 510 by the wind sent by the blowing fan 140.

When the material to be heated enters the reaction chamber body 510, microwaves can be supplied to the reaction chamber body 510 by at least one microwave generator 600, and the microwave energy is directly applied to the object to be heated.

And in order to realize uniform heating and sufficient mixing reaction of the material to be heated in the reaction chamber body 510, a first rotating connection assembly 300, a rotating power part 400 and a second rotating connection assembly 300' are provided.

The first and second rotating connection assemblies 300 and 300' have the same structure and are respectively disposed at the front and rear ends of the reaction chamber body 510.

The rotating power part 400 is used for providing rotating power for the first rotating connection assembly 300, when the rotating power part 400 operates, the first rotating connection assembly 300 rotates and drives the reaction chamber body 510 and the second rotating connection assembly 300' to rotate together, so as to realize the rotating mixing of the materials to be heated in the reaction chamber body 510.

In the present application, the reaction chamber 500 includes a reaction chamber body 510 and a casing 520, and the casing 520 is wrapped around the reaction chamber body 510.

Preferably, the number of the microwave generators 600 is plural, and the plurality of microwave generators 600 are each provided on the housing 520.

Preferably, in order to uniformly heat the material inside the reaction chamber body 510 in all directions, a plurality of microwave generators 600 are circumferentially disposed on the housing 520 along the circumferential outer side wall, and in particular, may be fixed on the housing 520 through a waveguide.

The reaction chamber body 510 is a cylindrical pipe with thin front and back ends and thick middle, and is made of wave-transparent high-temperature-resistant ceramic material.

And in order to enhance the heat preservation effect, a heat preservation layer 530 is arranged between the inner side wall of the shell 520 and the outer side wall of the reaction chamber body 510, and the heat preservation layer 530 is a heat preservation layer which can be used at a high temperature of 1400 ℃.

The thickness of the insulating layer 530 is not less than 100 mm.

Preferably, the housing 520 may be polyhedral, such as tetrahedral, hexahedral, or octahedral, to facilitate focusing of microwave energy and transport assembly.

In this application, in order to ensure the rotation of the reaction chamber body 510, a certain gap should be left between the insulating layer 530 and the outer sidewall of the reaction chamber body 510.

In order to accomplish the rotation of the reaction chamber body 510 with respect to the supply conduit 200 and the negative pressure channel 710, a first rotating and coupling assembly 300 and a second rotating and coupling assembly 300' are provided.

Referring to fig. 2, the first rotating link assembly 300 includes a first link 310, a first link pipe 320, and a first seal 330.

The first link member 310 includes an inner annular surface A1 and an outer annular surface B1 that rotate relative to each other.

The inner annular surface a1 of the first connection member 310 is connected to the outer sidewall of the supply conduit 200, and the outer annular surface B1 is fixedly connected to one end of the first connection pipe 320, wherein the first connection pipe 320 is located outside the supply conduit 200.

The other end of the first connection pipe 320 is connected to the front end of the reaction chamber body 510.

The first seal 330 also includes an inner annular surface a1 'and an outer annular surface B1' that rotate relative to each other, the housing 520 is fixedly connected to the outer annular surface B1 'of the first seal via a metal grommet P1, and the inner annular surface a1' of the first seal 330 is connected to the outer sidewall of the first connecting tube 310.

Wherein the material of the first seal 330 is a high temperature resistant material.

Referring to fig. 3, the second rotating joint assembly 300 'includes a second joint member 310', a second connection pipe 320', and a second seal member 330'.

The second connector 310' includes an inner annular surface a2 and an outer annular surface B2 that rotate relative to each other.

The inner annular surface A2 of the second connecting member 310 'is connected to the outer sidewall of the negative pressure channel 710, and the outer annular surface B2 is fixedly connected to one end of the second connecting pipe 320', wherein the negative pressure channel 710 does not extend into the reaction chamber body 510.

The other end of the second connection pipe 320' is connected to the rear end of the reaction chamber body 510.

The second sealing member 330 'also includes an inner annular surface a2' and an outer annular surface B2 'which rotate relative to each other, the housing 520 is fixedly connected to the outer annular surface B2' of the second sealing member 330 'through a metal protection tube P2, and the inner annular surface a2' of the second sealing member 330 'is connected to the outer sidewall of the second connection tube 320'.

Wherein the material of the second seal 330' is also a high temperature resistant material.

The rotary power part 400 is used to provide rotary power to the first rotary connection assembly 300, and specifically, the rotary power part 400 includes a power transmission assembly (not labeled) and a driving motor (not shown).

The power transmission assembly is connected to the first connection pipe 320, and transmits power output by the driving motor to the first connection pipe 320 to rotate the first connection pipe 320, so that the first connection pipe 320 drives the outer annular surface B of the first connection member 310, the inner annular surface a ' of the first sealing member 330, the reaction chamber body 510, the outer annular surface B2 of the second connection member 310', the second connection pipe 320' and the inner annular surface a2' of the second sealing member 330' to rotate.

The power transmission assembly may include a worm wheel and a worm engaged with the worm wheel, the worm wheel is disposed on the first rotation connection assembly 300, specifically on the first connection pipe 320, the worm is connected with the driving motor, and is configured to transmit power output by the driving motor to the worm wheel through the worm, and the worm wheel drives the first connection pipe 320 to rotate.

The power transmission assembly may also include a sprocket chain transmission part, a gear transmission part, and a gear provided on the first connection pipe 320, and the torque of the driving motor is transmitted to the gear on the first connection pipe 320 through the sprocket chain transmission part and the gear transmission part to rotate the first connection pipe 320.

In alternative embodiments, other power transmission components, such as a belt transmission, may be adopted to receive the torque transmitted by the driving motor, and the transmission between the driving motor and the first connection pipe 320 may also be in the form of a gear-gear, a synchronous belt, a chain, a coupling, or a combination thereof, which is not limited herein, as long as the torque of the driving motor can be transmitted to the first connection pipe 320 to realize the rotation of the first connection pipe 320.

The negative pressure structure 700 includes a negative pressure channel 710 and a related power negative pressure pumping device 720, the negative pressure structure 700 has any settable stable negative pressure value control, and after the negative pressure value reaches a set value, microwave heating is performed.

In addition, the negative pressure structure 700 further has a self-cleaning function of the air-extracting filter to prevent materials from entering the negative pressure system and blocking the negative pressure structure 700.

To realize the material feeding and discharging, a feeding valve 210 is disposed on the feeding pipeline 200, and a discharging valve 210' is disposed on the discharging pipeline.

The application process of the graphene microwave preparation device of the present application can be explained as follows.

(1) The material to be heated in the hopper 110 is sent to the feeding pipeline 200 by setting the number of revolutions of the feeder 120, after the number of revolutions of the feeder 120 is reached, the feeding motor 130 stops running, the blowing fan 140 runs, the feeding valve 210 and the discharging valve 210' are opened, and the material to be heated is sent into the reaction chamber body 510;

(2) when the rotary power part 400 is operated, the reaction chamber body 510 starts to rotate, the blowing fan 140, the feed valve 210 and the discharge valve 210' are closed, the negative pressure structure 700 is operated, and the microwave generator 600 is automatically controlled to start to provide microwaves to heat the reaction chamber body 510 after the negative pressure value reaches a set value;

the material to be heated is heated and rotated simultaneously, so that the material is uniformly heated and fully mixed and reacted, the material reaction speed is improved, and the time for preparing graphene is shortened;

(3) after the treatment time is up, the feed valve 210 and the discharge valve 210' are opened to release the pressure, and the feed fan 140 and the collecting device (which can be arranged at the discharge port of the discharge pipeline) are operated to pump out and collect the materials in the reaction chamber body 510;

(4) the batch processing of the graphene can be completed by repeating the above procedures.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A graphene microwave preparation device is characterized by comprising:

a supply portion for supplying a material to be heated;

a supply duct connected to the supply portion;

the discharge end of the feeding pipeline extends into the reaction cavity;

2. The graphene microwave preparation apparatus according to claim 1, wherein the supply unit includes:

a hopper bin;

3. The graphene microwave preparation device according to claim 1, further comprising a housing covering the periphery of the reaction chamber body;

the first rotating coupling assembly includes:

the second rotating coupling assembly includes:

4. The graphene microwave preparation device according to claim 3, wherein a heat insulation layer is disposed between the reaction chamber body and the housing, and a gap is formed between the heat insulation layer and an outer side wall of the reaction chamber body.

5. The graphene microwave preparation device according to claim 3, wherein the reaction chamber body is made of a wave-transparent high-temperature-resistant ceramic material.

6. The graphene microwave preparation apparatus according to claim 3, wherein when the number of the at least one microwave generator is several, several microwave generators are circumferentially disposed on the housing along a circumferential outer sidewall of the housing.

7. The graphene microwave preparation device according to any one of claims 3 to 6, wherein the housing has a polyhedral structure.

8. The graphene microwave preparation apparatus according to claim 1, wherein the rotary power unit includes:

9. The graphene microwave preparation apparatus according to claim 1, wherein,

a feed valve is arranged on the feed pipeline;

and a discharge valve is arranged on the discharge pipeline.

10. The graphene microwave preparation apparatus according to claim 9, wherein,

the feed valve and the discharge valve are respectively electric control sealing ball valves.