Device and method for solvent DMSO rectification recovery process in carbon fiber production process

Abstract

The invention relates to the technical field of carbon fiber processing, in particular to a device and method for a solvent DMSO rectification and recovery process in a carbon fiber production process, and solves the problems of high energy consumption, poor environment and generation of extra wastewater when equipment cleaning is conducted for precipitated high-boiling residues, discontinuous operation and poor production environment in the prior art. The invention relates to a device and method for a solvent DMSO rectification recovery process in a carbon fiber production process. The method comprises the steps of S1, feeding and preheating; S2, conducting first-effect rectification; S3, conducting second-effect rectification; S4, conducting third-effect rectification; S5, conducting fourth-effect rectification; S6, condensing and refluxing; S7, removing high-boiling-point residues; S8, stripping the high-boiling-point residues on line; and S9, dehydrating and refining. According to the invention, the consumption of live steam is reduced, the effective temperature difference required by heat transfer can be reduced by adopting a falling-film evaporator as a tower bottom reboiler, the situation that the amount of waste water is increased when high-boiling residues are cleaned in conventional recovery can be avoided, and meanwhile, a good working environment can also be ensured by a continuous closed operation working condition.

Description

technical field [0001] The invention relates to the technical field of carbon fiber processing, in particular to a device and method for solvent DMSO rectification recovery process in the carbon fiber production process. Background technique [0002] In the process of carbon fiber production, a large amount of dimethyl sulfoxide (DMSO) is used as the spinning solvent. With the expansion of production scale driven by product application, the conventional single-tower or three-tower recovery process shows high energy consumption and negative impact on precipitation. When cleaning equipment with high boiling substances, the environment is poor and additional waste water will be generated, the operation is interrupted, the production environment is poor and other disadvantages, which can no longer meet the needs of modern enterprises. [0003] Therefore, it is necessary to design a device and method for reducing energy consumption, stripping high boiling substances online, impro...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for the solvent DMSO rectification recovery process in the carbon fiber production process, which solves the problem of high energy consumption in the prior art, poor environment and additional waste when cleaning equipment for the precipitated high boiling substances Problems of waste water, intermittent operation, and poor production environment

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