Process and system for dry scrubbing of flue gas

Details Process and system for dry scrubbing of flue gas Process and system for dry scrubbing of flue gas

B - Operations, Transporting

01

D

165/2, 23/349

B01D 53/34 (2006.01)

Patent

CA 1168026

58-315 PROCESS AND SYSTEM FOR DRY SCRUBBING OF FLUE GAS ABSTRACT OF THE DISCLOSURE A flue gas dry scrubbing process and 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 combin- ation 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.

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