A method for scrubbing gases in several stages and a multi-stage scrubber for this purpose

摘要

The present invention concerns a method according to which wet washing of the gas stream is carried out in at least three stages, preferably in six successive stages and drop separation of the washed gases is carried out in a cyclone-shaped, connected drop separator consisting of several cylinders one within the other. The invention also concerns a method with which a washing stage that produces a pressure loss can be instantaneously bypassed during an increase in capacity. As a result, pure and drop-free gas is recovered which can be fed to combustion or into the opening and whose dust content fall below the admissible limit. The invention also concerns an arrangement for execution of the method, a multistage washer. The invention is especially suitable for cleaning of hot furnace gases in closed reduction furnace, where said furnace gases contain readily ignitable components. IMAGE