A cooling and pressure reducing dust removal device prepared by graphene

Abstract

The invention belongs to the technical field of powder graphene preparation equipment, and relates to a graphene preparation device for cooling, reducing pressure and dedusting. Cavity, pressure relief pipe, pressure gauge, damping pressure relief device, dust removal water tank and water discharge valve, etc., can enable high temperature and high pressure graphene to complete cooling, pressure reduction, and retention of powdered graphene in the damping pressure reduction kettle at the same time. The press controls the small flow rate to release the pressure and realizes the separation of powder graphene and high temperature and high pressure gas through the hydrolysis type dust removal water tank, so as to achieve the purpose of obtaining powder graphene without pollutant discharge and loss, and solves the problem of high temperature and high pressure in the prior art The dust in the equipment for preparing powdered graphene has serious problems of environmental pollution and powdered graphene loss, which eliminates the hidden danger of explosion caused by excessive graphene dust concentration; its structure is simple, the production cost is low, and the production efficiency is high. The production process is safe and environmentally friendly.

Description

Technical field: [0001] The invention belongs to the technical field of powder graphene preparation equipment, and relates to a graphene preparation cooling, pressure reduction and dust removal device, which can perform temperature reduction, pressure reduction and dust removal during the process of preparing powder graphene under high temperature and high pressure conditions. Background technique: [0002] Graphene is a carbon atom with SP 2 The hexagonal, honeycomb lattice composed of hybrid orbitals is a two-dimensional material with a thickness of only one carbon atom. Although its thickness is only 0.335nm, its specific surface area can reach 2630m. 2 / g. Graphene has super stability, outstanding electrical conductivity, mechanical properties and thermal conductivity, good light transmittance and chemical properties, and is a new material with the most development potential in the contemporary era. With the development and application of graphene derivatives and downstream p...

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Problems solved by technology

Also, the density of single-layer graphene is only 0.77mg / m 2 , is called an ultra-light material, and it floats in the air with a slight disturbance. How to reduce the diffusion and drift loss during the preparation process of such a light powder graphene, and how to collect a sufficient amount of finished powder graphene, these problems have always been Technical bottlenecks that plague the mass production of powdered graphene

The method used in the existing mass production technology is to put graphite oxide (GO) into a high-temperature autoclave for heating, and discharge the high-temperature and high-pressure gas mixed with powdered graphene produced by oxygen explosion directly into the atmosphere through a pressure relief tube, and then, The powdered graphene is blown out while filling the high-temperature furnace with cold air to cool down, and the powdered graphene is blocked and collected through the filter bag. However, the blocking effect of the filter bag on the powdered graphene with a particle size of only 0.335nm is limited, and there are still A large amount of high-quality powder graphene diffuses through the filter bag and floats in the air

Obviously, there are still many technical defects in the preparation of powder graphene in the prior art, especially in the steps of decompression, cooling, and collection of finished graphene. Reaching as much as 20-30%, not only seriously pollutes the air and the environment, but more serious is that the powdered graphene floating in the indoor air reaches a certain concentration, and there is a danger of explosion in case of an open flame

The preparation of existing powdered graphene is time-consuming and inefficient, resulting in high production costs, resulting in extremely high prices of powdered graphene, which not only restricts the large-scale production of powdered graphene, but also seriously restricts the production of powdered graphite. Practical applications of alkenes

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