Method of spray drying and washing and method of controlling air pollution
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United States of America Patent
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Jul 7, 2020
Grant Date -
Oct 25, 2018
app pub date -
Jun 27, 2018
filing date -
Nov 30, 2012
priority date (Note) -
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Abstract
A method of spray drying and washing using a spray drying apparatus, includes: spraying dehydrated filtrate from a spray nozzle hung down from a top side of the spray drying apparatus; introducing a part of flue gas into the spray drying apparatus to dry the dehydrated filtrate; wherein a compressed air is introduced into the spray nozzle to facilitate the spraying and into the wash nozzle to perform air purging during the spray drying, and jetting washing liquid from a wash nozzle provided on a side wall of the spray drying apparatus to wash the spray nozzle and an inside of the spray drying apparatus body, wherein the feeding of the dehydrated filtrate to the spray nozzle is stopped during the washing.
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