A low-temperature carbonization device for carbon fiber production

Abstract

The invention discloses a low-temperature carbonizing device for producing carbon fibers, and belongs to the field of technologies for producing carbon fibers. The low-temperature carbonizing device comprises a furnace, a sealing device, an exhaust system, a protection gas supply device, a cooling chamber and a temperature detection control device. The sealing device is connected to two ends of the furnace, and the exhaust system is communicated with a hearth of the furnace. The cooling chamber is connected with a strand outlet of the furnace by a non-contact sealing device, and the temperature detection control device is connected with a temperature sensor of the furnace by a temperature detection circuit. The low-temperature carbonizing device has the advantages that the cooling chamber is arranged at an outlet end of the furnace, accordingly, the temperatures of strands drafted out of the furnace can be effectively reduced, the carbonized high-temperature strands can be prevented from being oxidized by oxygen in air, and the quality of the carbon fibers can be improved; the temperature sensor is mounted inside the furnace, and accordingly the internal temperature of the furnace can be monitored and controlled in real time.

Description

technical field [0001] The invention relates to a low-temperature carbonization device used for carbon fiber production, belonging to the technical field of carbon fiber production. Background technique [0002] In the production process of carbon fiber, the raw silk needs to be pre-oxidized and carbonized to change its molecular structure to form a carbon fiber structure. Therefore, the pre-oxidation and carbonization process is a key process link in the carbon fiber production process. Among them, the carbonization process of carbon fiber is divided into low-temperature carbonization and high-temperature carbonization. Different carbonization equipment needs to be used in different carbonization stages. Among them, low-temperature carbonization is often heated step by step, and an inert gas needs to be used as a protective gas during carbonization. During the carbonization process, substances such as waste gas and tar will be produced, which need to be removed to preven...

AI Technical Summary

Problems solved by technology

At the same time, because the carbon fiber is carbonized at a higher temperature in the carbonization device, when the carbonized spinning is drawn out of the carbonization device, if the temperature is not lowered enough, it is very easy to be oxidized by the oxygen in the air, resulting in the quality of the carbon fiber. decline

The existing low-temperature carbonization equipment lacks the cooling link at the exit section of carbonization spinning, resulting in poor spinning quality

Images