Optimization of carbon dioxide compressing technology in the production of urea

Abstract

In the article the questions of optimization of technological schemes of obtaining liquid carbon dioxide directed to the carbamide synthesis plant are considered. The main drawback of traditional technical solutions is high energy costs, mainly due to the need to compress CO2 before it is fed to the synthesis reactor. Traditionally, technical solutions are proposed, based on the production of liquid low-temperature carbon dioxide, which increase the yield of nitrogen fertilizer. However, their significant disadvantage is high energy costs, which is largely due to the need to compress CO2 before is fed to the synthesis reactor. To solve the optimization of the technological stage of obtaining high-pressure carbon dioxide by combining the use of compression and pumping equipment, multifactor methods for modelling chemical-technological processes and software were used. With regard to urea aggregates of different power, several technological schemes are considered. The paper presents a variant of modernization of the turbocharger aggregate, due to which it is possible to achieve a significant increase in the yield of the final product of urea units in order to reduce CO2 emissions into the atmosphere.