Dry spinning organic solvent recovery and air circulation process and its device

Abstract

The invention relates to a process and a device for organic solvent recovery and air cycle use in dry spinning. A spinning shaft is sequentially provided with a high-temperature gas inlet, an organic solvent-containing gas exhaust port, a secondary high-temperature gas inlet and a cooling air exhaust port from top to bottom; a spinning shaft gas treatment system comprises a gas treatment loop I and a gas treatment loop II, the gas treatment loop I is used for recycling most of solvent from gas exhausted from the exhaust port, and the gas treatment loop II is used for further separating and recycling the organic solvent; a turning wheel is cooled and the regeneration treatment is realized due to the design of the pipeline and the own energy, the regenerated gas can be continuously used for the gas treatment system, and no gas is exhausted outside the system. The moisture content of circulating air and the recycled organic solvent is low, no organic solvent hydrolysis phenomenon occurs in the follow-up treatment, no low-temperature chilled water is required during solvent recovery, and zero emission in chemical fiber production is realized.

Description

Technical field [0001] The invention relates to spinning processing equipment, in particular to a dry spinning organic solvent recovery and air recycling process and a device. Background technique [0002] Chemical fiber has been widely used in people's production and life. For example, polyacrylonitrile fiber is mainly used as wool, knitted fabric (pure spinning or blended with wool) and woven fabric, especially suitable for interior decoration cloth, such as curtain; while spandex Silk is also widely used in wrapping, cotton bales and knitting; the recently developed polyimide fiber has been widely used in the manufacture of high temperature air filters due to its unique temperature resistance. [0003] Dry spinning is a commonly used method for manufacturing chemical fibers. During dry spinning, the spinning liquid trickle from the pores of the spinneret enters the spinning tunnel. Through the action of the high temperature airflow in the tunnel, the solvent in the liquid strea...

AI Technical Summary

Problems solved by technology

Direct discharge of dimethylamine and acetic acid into the atmosphere will cause environmental pollution. At the same time, the technology of recycling dimethylamine and acetic acid is difficult and economical.

[0014] More importantly: At present, the air treatment process in the spinning chamber requires a large amount of low-temperature chilled water, and the refrigerators that produce chilled water consume a large amount of electricity, which also increases the cost of chemical fiber production.

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