MONO PRESSURE SYSTEM FOR PRODUCING NITRIC ACID AND METHOD OF OPERATING THEREOF
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Aug 25, 2022
filing date -
Aug 25, 2022
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Abstract
A system for producing nitric acid at reduced power consumption, including an air compressor producing a compressed air stream; a source of pressurized oxygen-rich gas having a pressure higher than the pressure of the compressed air stream; a mixing apparatus for mixing the oxygen-rich gas/compressed air stream mixture with an ammonia gas stream; an ammonia converter to provide in a NOx gas/steam mixture; a water cooler/condenser for separating and condensing steam from NOx gas in the gaseous NOx gas/steam mixture; an absorption tower downstream the water cooler/condenser, for absorbing NOx gases in water, to provide in a stream of raw nitric acid-containing residual NOx gas and a tail gas including NOx gases. The system further includes a mechanism for splitting the tail gas into a first tail gas stream and a second tail gas stream; and a mechanism for adjusting the amount of tail gas being split.
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