Method for flue gas conditioning with the decomposition products

Details Method for flue gas conditioning with the decomposition products Method for flue gas conditioning with the decomposition products

1988-09-12

1989-10-10

Noziok, Bernard

Gas separation

Means within gas stream for conducting concentrate to collector

423541A, B03C 100

Patent

active

048728870

ABSTRACT:
A method is provided for enhancing the efficiency of fly ash collection in an electrostatic precipitator by lowering the resistivity of the fly ash particles in the flue gas, comprising the steps of introducing an aqueous solution of ammonium sulfate or ammonium bisulfate into a slipstream of hot flue gas or hot combustion air in a chamber external to the main flue gas duct wherein thermal decomposition is effected, removing the NH.sub.3 decomposition product by catalytic oxidation to increase the effectiveness of the SO.sub.3 decomposition product, and then distributing the SO.sub.3 decomposition product into the main flue gas stream exiting from the air preheater at a point upstream from the electrostatic precipitator.

REFERENCES:
patent: 3855386 (1974-12-01), Moore
patent: 4070424 (1978-01-01), Olson et al.
patent: 4081515 (1978-03-01), Gruhier et al.
patent: 4533364 (1985-08-01), Altman et al.

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