System for dry scrubbing of flue gas

Details System for dry scrubbing of flue gas System for dry scrubbing of flue gas

1981-12-03

1984-05-01

Chiesa, Richard L.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

55 22, 55 73, 55430, B01D 5334

Patent

active

044461097

ABSTRACT:
A flue gas dry scrubbing system achieves higher sulfur dioxide removal efficiency with a better utilization of alkali reagent chemicals as well as increased dry product recovery performance using a combination of spray drying with an alkali reagent slurry and with a recycled stream comprising a mixture of unreacted alkali, sulfite and sulfate reaction products and flyash which directly contacts the sulfur dioxide-containing flue gas. Preferably the recycled mixture contacts the flue gas in the spray dryer. The invention utilizes a splitting method and a splitter apparatus wherein the particle product powder is separated into two fractions for recycling and for product disposal. The rate of splitting is fully adjustable over a wide range.

REFERENCES:
patent: 3151187 (1964-09-01), Comte
patent: 3494099 (1970-02-01), Eng et al.
patent: 3929968 (1975-12-01), Taub
patent: 3958961 (1976-05-01), Bakke
patent: 3995005 (1976-11-01), Teller
patent: 4081513 (1978-03-01), Moss
patent: 4178349 (1979-12-01), Wienert
patent: 4273750 (1981-06-01), Hollett, Jr. et al.
patent: 4305909 (1981-12-01), Willett et al.
patent: 4325713 (1982-04-01), Rosenberg et al.

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