A METHOD OF AND APPARATUS FOR PURIFYING AN EXHAUST GAS

摘要

The biological washing reactor and the wet elec- trofilter are located in a common container. This container ends at the bottom at a biotank. A droplets remover is lo- cated at the purified gas outlet. The exhaust gas which is to be purified and which contains impurities in form of aero- sols, dust and organic gases flows through the exhaust gas inlet into the container and flows firstly through the pre- liminary separator and thereafter through a biological wash- ing reactor and the wet electrofilter. The process water for the continuous sprinkling of the preliminary separator and of the biological washing reactor, and for the intermittent cleaning of the wet electrofilter and of the droplets remover is circulated in a closed loop via the biotank. The circu- lated process water is regenerated in the biotank. The solid matter present in the portion of the process water which is fed to the biological washing reactor and to the droplets re- mover is separated and removed in a solids removing apparatus and this portion of the process water is cooled in a heat ex- changer for an achieving of an optimal growth of bacteria.