Back to results
US 6,149,715 AGranted
Method for scrubbing gases
AssigneeOutokumpu Oyj
InventorsVeli Keinanen, Launo Lilja, Pekka Niemela, Janne Ollila
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeOutokumpu Oyj
InventorsVeli Keinanen, Launo Lilja, Pekka Niemela, Janne Ollila
Estimating the term…
The invention relates to a method according to which the wet scrubbing of a gas flow is performed in at least three, advantageously six successive steps or phases, and the droplet separation of the scrubbed gases is carried out in a uniform cyclone-like droplet separator composed of several nested cylinders. The invention also relates to a method for momentarily bypassing, during a capacity rise, a scrubbing phase that causes pressure loss. As a result, there is obtained a clean and dropless gas that falls below the allowed dust content limits and can thus be either conducted to combustion or discharged in the open air. The invention also relates to an apparatus, a multiphase scrubber, for realizing the method. The invention is particularly suited to be used for scrubbing hot furnace gases from closed reduction furnaces, where said furnace gases contain easily inflammable components.
A method for scrubbing gases by wet scrubbing in several different phases, characterized in that the gases are scrubbed in at least three phases, so that in the first WG scrubbing phase (4), the gases are conducted to a scrubber (5), where the speed of a scrubbing liquid to be sprayed in the gases is many times higher than the gas speed, so that the major part of coarser particles contained in the gases are separated into the scrubbing liquid;
Dependencies are inferred from the claim text.