Low energy urea plants

摘要

Optimisation of the energy consumption of the urea plant within an ammonia-urea complex is under continuous development. Although it represents only 20% of the energy consumption of the ISBL process units in an ammonia-urea complex, optimisation of the energy supply to the urea unit has a significant impact on the ammonia plant configuration. Modern urea technology is characterised by lower consumption in terms of steam, electric power, cooling water, carbon dioxide and ammonia. The introduction of a high pressure section in the urea process in the 1950s and 1960s addressed the need for a low energy approach.