Using flue gas energy to vaporize aqueous reducing agent for red

Details Using flue gas energy to vaporize aqueous reducing agent for red Using flue gas energy to vaporize aqueous reducing agent for red

1992-07-31

1994-03-22

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232391, C01B 2100, B01J 800

Patent

active

052962067

ABSTRACT:
A method of vaporizing aqueous reducing agent for reducing NO.sub.x in flue gas in a combustion system. A heat exchanger is disposed in the flue gas path so that heat from the flue gas heats a heat transfer medium, preferably ambient air. The heated air is passed to a vaporizer vessel where it vaporizes an aqueous reducing agent, preferably aqueous ammonia. The vaporized ammonia is injected into the flue gas path where it is effective to reduce NO.sub.x. Some aspects of an automatic control system are disclosed.

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S. M. Cho, A. H. Seltzer, Z. Tetsui, "Design and Operating Experience of Selective Catalytic Reduction Systems for NO.sub.x Control in Gas Turbine Systems", Jun. 1991.

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