NOVELTY - Urea production system has a carbon-dioxide compressor that is respectively connected to a carbamate pump and ammonia pump. The carbamate separator is connected with an urea synthesis tower through the carbamate pump. An intermediate-pressure ammonia absorption tower is connected with an evaporative cooler connected with the ammonia pump. The intermediate-pressure decomposition tower is positioned between a falling film evaporator and carbamate separator. An inert gas scrubber is positioned between the evaporative cooler and exhaust ammonia gas cleaning device.    USE - Energy saving type urea production system.    ADVANTAGE - The urea production system is featured with low investment, low energy consumption, simple operation, high flexibility, and considerable economic benefit and social benefits.    DETAILED DESCRIPTION - Urea production system has a carbon-dioxide compressor that is respectively connected to a carbamate pump and ammonia pump. The carbamate separator is connected with an urea synthesis tower through the carbamate pump. An intermediate-pressure ammonia absorption tower is connected with an evaporative cooler connected with the ammonia pump. The intermediate-pressure decomposition tower is positioned between a falling film evaporator and carbamate separator. An inert gas scrubber is positioned between the evaporative cooler and exhaust ammonia gas cleaning device. The carbamate condenser, the carbamate separator, the ammonia evaporation pressure absorber, the evaporative cooler, the ammonia buffer tank, the inert gas scrubber, the exhaust ammonia gas cleaning device, the dimethyl liquid preheater (sic), the horizontal low pressure absorber and the falling film evaporator are respectively connected with one another.    An INDEPENDENT CLAIM is included for production of urea which involves reacting pressurized liquid ammonia with carbon dioxide, dehydrating the obtained ammonium carbamate and separating urea.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of urea production system. (Drawing includes non-English language text)