Method for control of mercury
OwnerWilliam Downs, Ralph T. Baileyinventors
Life of this patent
Estimating the term…
Abstract
A method and apparatus for reducing mercury in industrial gases such as the flue gas produced by the combustion of fossil fuels such as coal adds hydrogen sulfide to the flue gas in or just before a scrubber of the industrial process which contains the wet scrubber. The method and apparatus of the present invention is applicable to installations employing either wet or dry scrubber flue gas desulfurization systems.
Claims37
In a method using a scrubber for receiving and scrubbing an industrial gas containing oxidized mercury with an aqueous alkali reagent, the improvement comprising:
- adding hydrogen sulfide to the industrial gas;
- and scrubbing the industrial gas in the scrubber.
In an apparatus using a scrubber for receiving and scrubbing an industrial gas containing mercury with an aqueous alkali reagent, the improvement comprising:
- means for generating hydrogen sulfide;
- and means for supplying the hydrogen sulfide to the industrial gas upstream of the scrubber.
An apparatus for receiving and scrubbing an industrial gas containing mercury with an aqueous alkali reagent, comprising:
- a scrubber for scrubbing the industrial gas with the aqueous alkali reagent;
- flue means for conveying the industrial gas to the scrubber;
- means for generating hydrogen sulfide;
- and
- means for supplying the hydrogen sulfide into the industrial gas conveyed by the flue means.
Dependencies are inferred from the claim text.