How is the pressure in the low-pressure drum adjusted to control the degree of condensation of ammonia and carbon dioxide in the high-pressure condenser?
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By reducing the drum pressure, will the degree of ammonia and carbon dioxide condensation in the high-pressure methane cooler increase or decrease?
Reducing the drum pressure can promote the condensation of ammonia and carbon dioxide to produce potassium ammonium; the degree of condensation increases. The appropriate pressure level depends on factors such as conversion rate, load, and the ammonia-to-carbon ratio. But to reach the synthesis tower, dehydration is required to produce urea, and some heat is needed for this exothermic reaction.
Check the cooling liquid and gas outlet temperatures of the Gaojia unit. The system load corresponds to the pressure in the low-pressure drum; for example, 70% corresponds to a pressure of around 0.55. We also need to consider the steam production volume of the Gaojia cold system. There are many reference points.
The reaction between ammonia and carbon dioxide is exothermic; the role of low pressure is to remove heat. The lower the pressure, the more heat is removed, which means that the degree of condensation increases