Method for reducing the visible downwind detached plume opacity
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United States of America Patent
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Oct 6, 2015
Grant Date -
Jun 26, 2014
app pub date -
Jan 14, 2013
filing date -
Dec 21, 2012
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Abstract
The invention relates to a method for reducing aerosol emissions from a urea granulation plant with a recovery of the resulting scrubber bleeds, with
- a granulator producing urea from a concentrated urea solution and an evaporation of the included water, giving urea granulates and an exhaust of dust, ammonia and ammonium cyanate, anda following scrubbing or removing stage for the dust, anda following scrubbing acid stage, resulting in a first stream comprising mainly aerosols and a second stream comprising ammonium salts, anda following aerosol stage with spray and collection devices, releasing a first stream of an exhaust of air, and a second stream of ammonium cyanate and water, andthe second stream of the aerosol stage of ammonium cyanate and water is recovered into the urea granulation plant or into a urea fertilizer plant.
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