Vacuum filtration system of graphite heat-conducting film carbonization furnace

Abstract

The invention belongs to the technical field of graphite heat-conducting film production equipment, and particularly relates to a vacuum filtration system of a graphite heat-conducting film carbonization furnace. The vacuum filtration system of a graphite heat-conducting film carbonization furnace comprises a carbonization furnace, a filtration assembly and a vacuum pump, a gas outlet of the carbonization furnace is connected with a gas inlet of the filtration assembly through a first exhaust pipeline, and a gas outlet of the filtration assembly is connected with the vacuum pump through a fourth exhaust pipeline; and the filtration assembly comprises a first-stage condensation filter, a second-stage adsorption filter and a third-stage adsorption filter which are arranged in sequence. By changing the arrangement of the condensation pipelines of the first-stage condensation filter, the arrangement density of the fins on the condensation pipelines and the cooling water inlet and outlet mode, the effective area of the second-stage adsorption filter is increased, the capacity of the whole vacuum filtration system can be improved, the vacuum degree of the system is ensured, and the influence of waste gas on products in the furnace is avoided.

Description

technical field [0001] The invention belongs to the technical field of graphite heat-conducting film production equipment, and in particular relates to a vacuum filtration system for a graphite heat-conducting film carbonization furnace. Background technique [0002] At present, the main preparation method of synthetic graphite thermal conductive film is to place the polyimide film on the tooling fixture, followed by low-temperature carbonization and high-temperature graphitization heat treatment, and finally obtained through calendering, lamination and die-cutting processes. [0003] Among them, the low-temperature carbonization process is a crucial part of the entire production process. During the low-temperature carbonization process, the polyimide film undergoes a pyrolysis reaction with the increase of the carbonization temperature in a vacuum state, the polymer chain in the film is broken, and the internal N, H, and O components generate CO, CO 2 , N 2 , HCN and tar ...

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Problems solved by technology

When this part of the exhaust gas passes through the vacuum filtration system of the carbonization furnace, the tar in it will cool down and condense and adhere to the filtration system, resulting in the blockage of the filtration system and reducing the vacuum filtration capacity of the system. In severe cases, the interior of the filtration system will be completely blocked. The temperature difference is too large, the vacuum pump is damaged, and additional equipment maintenance costs are added

At the same time, the exhaust gas is difficult to discharge and is dispersed in the entire carbonization furnace. The impurity components in the exhaust gas are left on the film, which affects the product quality.

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