Patent ID: 6634119
Filing Date: 2003-10-21
Classification: B01D

Abstract:
An adsorptive ethanol drying apparatus for vaporizing ethanol supplied from an ethanol storage tank, and adsorbing water contained in the vaporized ethanol to an adsorbent charged in adsorption towers while condensing ethanol of a high purity, free of the water, in a separate storage tank, comprising:a microwave generating device for generating microwaves; a first waveguide connected to the microwave generating device; a switching waveguide connected to the microwave generating device via the first waveguide and pneumatic driven to switch the microwaves between the adsorption towers; a second waveguide arranged around each of the adsorption towers and connected to the switching waveguide, the second waveguide serving to guide the microwaves transmitted from the switching waveguide to the adsorption tower; and a vacuum pump adapted to apply vacuum to the adsorption towers for an easy desorption of adsorbates adsorbed to the adsorbent in the adsorption towers; whereby the adsorbates adsorbed to the adsorbent in the adsorption towers are desorbed by the waveguides guided to the adsorption towers in an alternating fashion by the switching waveguide and the vacuum generated by the vacuum pump.