Dual system process for ammonia vapor recovery
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United States of America Patent
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Nov 24, 2020
Grant Date -
Nov 8, 2018
app pub date -
May 4, 2018
filing date -
May 5, 2017
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Abstract
A method for recovering ammoniacal nitrogen, in the form of ammonium carbonate and/or ammonium bicarbonate, from an ammoniacal nitrogen-containing vapor that comprises introducing said vapor into at least one pressurizable ammonia scrubbing vessel containing water, simultaneously introducing a carbon dioxide-containing vapor into at least one pressurizable carbon dioxide scrubbing vessel containing water, and simultaneously pumping the solutions created in said scrubbers via hydrologic connections between said scrubbers to mix the solution to create an ammonium carbonate and/or ammonium bicarbonate containing mixture, all while maintaining independent and unmixed vapor streams throughout the entire process. The method further involves recovering ammonium carbonate and/or ammonium bicarbonate from the mixture for further use.
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