Graphene production system

Abstract

The invention relates to the field of graphene production and discloses a graphene production system which comprises a graphite exfoliating furnace, a secondary ultrasonic device and a filtering device, wherein the graphite exfoliating furnace is connected with the secondary ultrasonic device; the secondary ultrasonic device is connected with the filtering device; intercalation graphite is adopted as a raw material; the intercalation graphite is exfoliated in sequence by using the graphite exfoliating furnace to prepare exfoliated graphite, the exfoliated graphite is further conveyed through the secondary ultrasonic device and the filtering device, and thus graphene is finally prepared. With the combination of the exfoliating furnace and the secondary ultrasonic device, high-multiplied exfoliated graphite is prepared by using the exfoliating furnace, the exfoliated graphite as the raw material is subjected to pre-exfoliation and ultrasonic exfoliation, circulation reaction is implemented, and together with secondary ultrasonic exfoliation, the exfoliation efficiency can be greatly improved, and thus large-scale, high-efficiency and low-cost production of graphene is achieved.

Description

technical field [0001] The invention relates to the field of graphene production, more specifically, to a graphene production system. Background technique [0002] Expanded graphite is a new type of composite material on the atomic and molecular scales formed by inserting foreign substances between graphite layers, and has become a new development direction in the graphite industry. It not only retains the excellent physical and chemical properties of graphite, but also produces a series of new physical and chemical properties due to the interaction between the carbon atom plane and the intercalated substance, such as high electrical conductivity, superconductivity, catalytic properties, hydrogen storage properties, etc. The expanded graphite obtained by high-temperature expansion looks like a worm, has stable thermodynamic properties, has a very large specific surface area and rich pore structure, and can be used as an adsorption material for organic pollutants such as oil....

AI Technical Summary

Problems solved by technology

[0003] The high-temperature expansion method is a traditional method for preparing expanded graphite through high-temperature rapid heating. Graphite expansion furnaces are often used. The principle is to put expandable graphite (that is, intercalated graphite) into the feed port, and blow the expandable graphite into the furnace through a fan. , carry out high-temperature puffing, and after puffing, the fan in the furnace blows the expanded graphite into the discharge port (the discharge port is set above the feed port and connected with the furnace) to complete the collection without complete puffing. Graphite then falls to achieve the purpose of separation because its weight is greater than that of expanded graphite, but the above-mentioned equipment has the following problems: 1. The temperature in the furnace body is not uniform, and the temperature of the inner wall of the furnace is obviously higher than that in the furnace, which leads to poor heating of intercalated graphite during expansion. Uniform, low reaction efficiency; 2. After the reaction, due to the relatively small mesh size of expanded graphite, it is easy to get stuck in the equipment during transportation, which affects the yield

3. Since the puffing process is mainly affected by the puffing time and puffing temperature, the existing equipment cannot accurately control the reaction time and reaction temperature of the intercalated graphite in the puffing furnace

At present, most of the preparation of graphene stays in the laboratory stage, and its production equipment is inefficient and difficult to meet the requirements of large-scale preparation, which leads to high production cost of graphene

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