A low holdup rectifying column for high purity THF production

Abstract

This utility model discloses a low-retention distillation column for the production of high-purity THF, comprising a frame, a water tank fixedly connected to the top of the frame, an inlet pipe fixedly connected to the top of the water tank, an annular water pipe fixedly connected to one end of the inlet pipe, a distillation column fixedly connected inside the frame, and a spiral track fixedly connected inside the distillation column. Through this structure, the distillation column is cleaned through the holes inside the annular water pipe, and then wastewater is discharged through the outlet pipe by rotating the second valve at the bottom. This removes residual THF polymers, impurities, or preceding materials from the inner wall, preventing them from mixing into subsequent distillation processes and directly preventing a decrease in product purity. The continuous spiral structure of the spiral track allows the gas and liquid phases to contact and separate rapidly along a shorter path, avoiding prolonged material retention inside the column. This is particularly important for THF, reducing degradation or polymerization caused by prolonged high temperatures and ensuring product purity.