Dry spinning organic solvent recovery and air circulating use method

Abstract

The invention relates to a dry spinning organic solvent recovery and air circulating use method. A spinning shaft is respectively provided with a circulating air intake opening and an organic solvent-containing waste air exhaust opening from top to bottom, wherein the organic solvent-containing waste air exhaust opening is sequentially connected with a hot air intake and exhaust opening of a heat exchanger, a circulating air high boiling organic solvent recovery assembly, an electric air valve, an air delivery fan, a cold air intake and exhaust opening of the heat exchanger, an air heater and the circulating air intake opening, a branch pipeline is connected with an air exhaust opening of the circulating air high boiling organic solvent recovery assembly and an exhaust air high boiling organic solvent recovery assembly, a branch pipeline is connected with a fresh air supplementing opening, the electric air valve for controlling fresh air, a fresh air cooler, and an air intake opening of the air delivery fan, and an organic solvent concentration detection instrument is arranged on a pipeline of the air exhaust opening of the circulating air high boiling organic solvent recovery assembly. The dry spinning organic solvent recovery and air circulating use method has the advantages that the solvent recovery cost is low, the running is safe and continuous, one part of air is exhausted to the outside, the negative pressure in the spinning shaft is formed, and other spinning devices are not needed by the spinning shaft.

Description

technical field [0001] The invention relates to dry spinning waste gas treatment equipment containing organic solvents, in particular to a dry spinning organic solvent recovery and air circulation device. Background technique [0002] Chemical fibers have been widely used in people's production and life. For example, polyacrylonitrile fibers are mainly used as wool, knitted fabrics (pure spinning or blended with wool) and woven fabrics, especially for interior decoration fabrics, such as curtains; and spandex Silk is also widely used in covering, cotton bales and knitting; recently developed polyimide fibers have been widely used in the manufacture of high-temperature air filters due to their unique temperature resistance. [0003] Spandex is commonly produced by dry spinning. Dry spinning is a commonly used method for manufacturing chemical fibers. During dry spinning, the fine stream of spinning solution pressed out of the capillary pores of the spinneret enters the spin...

AI Technical Summary

Problems solved by technology

[0006] During the production of spandex by dry spinning, the pollution is large, the process is complicated, and the construction investment cost is too high. Once the organic solvent recovery device breaks down, spandex production must be stopped immediately , resulting in a huge waste of

Images