Method for dry removal of sulfur dioxide from furnace flue, coal and other gases
OwnerSidney M. Heinsinventor
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Abstract
A process using run-of-the-mill flue dust from open hearth and basic oxygen steel making processes having certain iron-zinc values as a sulfur dioxide absorbent and pollutant control for industrial and public utility furnace flue gases, which materials, upon solid dry injection into a chemical reaction zone of an industrial or public utility furnace in an amount in excess over stoichiometric, results in substantial dry removal of the sulfur dioxide therefrom, and from which reaction products are cleaned by conventional gas cleaning apparatus.
Claims4
A method for the dry removal of sulfur dioxide from flue gas of a furnace having a chemical reaction chamber to which the flue gas at a temperature in the range of 800 to 1800.degree. F. flows from a fuel combustion zone, using as a chemical reactant run-of-the-mill flue dust from open hearth and basic oxygen steel-making processes, comprising the combination steps of:
- a. injecting an amount of the dry flue dust into the flue gas in the chemical reaction chamber at least sufficient for the substantial absorption of the sulfur dioxide therein, and
- b. cleaning the resulting chemical reaction products from the flue gas.
Dependencies are inferred from the claim text.