The invention discloses a
system for mixing, utilizing and recycling
waste heat in
urea production, and relates to the technical field of recycling, which comprises the following steps of: before
urea production starts, initially setting a
heat energy distribution proportion and operating parameters, and collecting
urea production data by deploying various sensors; based on urea production data, a
heat energy demand prediction model is constructed, and
waste heat is divided into different temperature levels; according to the prediction result, the distribution proportion of
waste heat of different temperature levels is dynamically adjusted; according to the dynamically-adjusted
heat energy distribution proportion, waste heat of different temperature levels is utilized in a gradient mode through a multi-level
heat exchanger; waste heat which cannot be utilized immediately is guided into the
phase change material to be stored, released according to production requirements and distributed again; through construction of the heat
energy demand prediction model and application of the
phase change material, effective division and efficient gradient utilization of waste heat of different temperature levels are achieved, and continuous supply of heat energy in the production process is ensured.