| 摘要 |
<p>PURPOSE:To improve drying efficiency by supplying raw gas to the inside or outside of a hollow yarn under specified conditions, and introducing a specified amt. of the produced dry gas into the permeated steam side to purge the steam. CONSTITUTION:The raw gas contg. steam is introduced from a supply port 2, and supplied to the space 12 outside the hollow yarn 6 so that the flow velocity in the lengthwise direction of the hollow yarn is controlled to >=0.1m/sec, and the contact time with the hollow yarn to 2-20sec. The raw gas flows to a discharge port 3, and is taken out therefrom as a dry gas. The steam is permeated through the hollow yarn 6. From 10-70% of the obtained dry gas is depressurized, and introduced to the inside of the hollow yarn 6 from a purging port 5 to purge the steam.</p> |
