Acetic acid steam treatment device for PVA fiber spinning

The utility model discloses an acetic acid steam treatment device for PVA (polyvinyl alcohol) fiber spinning, relates to the technical field of PVA fiber spinning processing, and solves the problems that acetic acid steam is easy to leak and the spinning condition cannot be observed due to untight sealing in the prior art; the cover plate is in a flat plate shape, and the vacuumizing range is limited, so that the acetic acid steam cannot be completely pumped out; meanwhile, water drops are easy to condense on the cover plate, so that the proportion of the neutralization bath is changed, and the production stability is influenced. Comprising a neutralization bath, a triangular cover arranged on the neutralization bath, an exhaust fan, two acetic acid steam absorption pipelines, a U-shaped filler pipe and filler filled in the U-shaped filler pipe, and one acetic acid steam absorption pipeline is arranged at the input end of the exhaust fan; through the design of the triangular cover, the flanged plate, the exha