Patent ID: 8518165

Claim:
A dry exhaust-gas treating apparatus comprising: an adsorption tower configured to remove harmful substances in an exhaust gas using an adsorbent; a regeneration tower configured to release adsorbed substances from the adsorbent; a first transfer passage configured to transfer the adsorbent from the adsorption tower to the regeneration tower; a second transfer passage configured to transfer the adsorbent from the regeneration tower to the adsorption tower; a lock hopper connected only at any one of ends of the regeneration tower; a rotary valve connected only at the other end of the regeneration tower; a desorbed gas discharge passage through which a desorbed gas including desorbed substances from the adsorbent is discharged from the regeneration tower; an adjusting unit is disposed on the desorbed gas discharge passage; a pair of pressure gauges which detect a differential pressure in the rotary valve; and a control unit which adjusts the degree of opening of the adjusting unit when the differential pressure exceeds a predetermined range and which maintained the differential pressure in the rotary valve within a fixed range.