reduction apparatus providing improved gasification of urea
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United States of America Patent
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May 23, 2017
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app pub date -
Nov 10, 2015
filing date -
Nov 10, 2014
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Abstract
Disclosed is an apparatus for gasifying urea from aqueous solution, comprising: a vertically-oriented gasification chamber. A gas inlet opening permits entry of hot gases from the top and a gas outlet opening for permitting the removal of gases including gasified urea from the bottom. Sidewalls define a gasification chamber communicating with the gas inlet and gas outlet. The sidewalls include, an injector support section having a generally cylindrical side wall, at least one injector for introducing fine droplets of aqueous urea parallel to the central vertical axis, and a gas swirling device including a frame and a plurality of vanes for downwardly spiraling gases passing through it from top to bottom. Also, defined by the sidewalls are a conical midsection is provided with an outwardly expanding diameter from top to bottom, and a conical collection section with inwardly decreasing diameter from top to bottom. The apparatus is arranged such that aqueous urea is introduced into a downwardly spiraling flow of hot gases that prevents droplets from contacting chamber sidewalls until gasification is complete.
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