What will be the effect of adding a small amount of CO2 gas to the low-pressure distillation tower of the carbon dioxide stripping method?
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In the carbon dioxide stripping urea process, a small amount of CO2 gas is added to the lower part of the packing layer in the low-pressure distillation tower. How will it affect the distillation effect?
In the carbon dioxide stripping urea process, since the ammonia-to-carbon ratio in the high-pressure circle is low, the ammonia-to-carbon ratio in the unreacted products entering the low-pressure distillation tower is also low. If CO2 is added again, the ammonia-to-carbon ratio that enters the low-pressure ammonium methane condenser for washing and absorption will be lower. Although it is beneficial to the washing and absorption of ammonia, it is not conducive to the washing and absorption of CO2, which will cause the loss of CO2 and is not worth the loss! Therefore, in actual production, a certain amount of ammonia is often added to the inlet of the low-pressure ammonium methane condenser to appropriately increase its ammonia-to-carbon ratio.
There is only one benefit out of a hundred harms. As a result, the composition of the methane ammonium solution is poor and often fluctuates. Caused by poor recovery, please refer to http://bbs.hcbbs.com/thread-434752-1-1.html This post was last edited by 1025199692 on 2009-4-12 15:11 ]