Standard for controlling oxygen content in urea feed gas
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I would like to ask the experts: what is an appropriate level of oxygen content in the carbon dioxide gas used as raw material in the urea synthesis tower for a 300,000 tons per year aqueous solution full-circulation production process? This post was last edited by Fan Zhou Wu Hu on 2009-4-8 at 00:07
Regardless of the device’s capacity, the value remains the same at 0.5%
The oxygen content in the raw carbon dioxide gas should be controlled based on the oxygen content of the CO2 entering the stripping tower, generally kept at around 0.6%. As for the amount of oxygen added to the carbon dioxide at the compressor, if a dehydrogenation unit is available, a high hydrogen content requires more oxygen for dehydrogenation, resulting in a higher oxygen addition rate; however, it is necessary to ensure that the oxygen content in the CO2 fed into the stripping tower remains around 0.6%.