GAS TREATMENT DEVICE AND GAS TREATMENT METHOD

PROBLEM TO BE SOLVED: To utilize an adsorption power of activated carbon fiber material more effectively than that in the conventional technique and to improve recovery efficiency of organic solvent from gas to be treated. SOLUTION: In this gas treatment device of alternately switching an adsorption treatment state which uses the activated carbon fiber material as an adsorption element and a desorption state, a discharge pipe on the bottom part of an adsorption tank (tank drain line) and a piping which discharges coagulated liquid from a cooling part (recovered liquid line) are connected independently or joinedly to a solvent recovering part in such a manner that the drain which is coagulated on desorption does not flow backward and, thereby, the wetting of the activated carbon fiber material due to the backward flow of the coagulated liquid is prevented.