Patent ID: 9702623
Date: 2017-07-11
CPC Classifications: B01D,F26B

Claim:
1. A drying device for hollow fiber membranes, comprising a drying chamber which comprises an inlet, an outlet, and a heating element for the hollow fiber membranes, at least two guide rolls located within the drying chamber causing at least two hollow fiber membranes to travel inside the drying chamber, and at least two winding bobbins disposed outside the drying chamber, wherein the drying chamber has only one inlet and one outlet for the hollow fiber membranes, and wherein the heating element comprises a hot air supply means or an infrared lamp, and the heating element further comprises a circulation element that circulates a gas, and the circulation element comprises a blower with a gas inlet port and a gas outlet port, which are arranged to blow the gas to the hollow fiber membranes traveling in the drying chamber, and the gas inlet port is disposed at an upper portion and the gas outlet port is disposed at a lower portion inside the drying chamber for the heating element to blow the gas to the hollow fiber membranes traveling vertically from the upper portion to the lower portion, wherein the guide rolls comprise free guide rolls each having a diameter of 60 mm to 300 mm, and the guide rolls are arranged so that the hollow fiber membranes reciprocate and travel from the lower portion inside the drying chamber to the upper portion inside the drying chamber while traveling horizontally, and wherein a rotation speed control element is attached separately to each of the at least two winding bobbins, and the rotation speed control element comprises a motor of variable rotation speed.