| In this paper, pre-concentration urea plant vacuum system as the research background. The role of the pre-concentrator V-104 / E-104: The V-102 by gas mixture into the E-104 is absorbed by the shell to generate carbamate, emit a lot of heat to heat the urine to the L-103, so that the urine Rapture concentrated. At the same time lowering the temperature of ammonium, more conducive to absorption and carbamate formation. E-114 and reduces the thermal load, to save part of the steam. So the pre-concentrator heat directly affects the smooth operation of this device and the rational use of energy. Aiming E104 shell side entrance temperature difference is low, L104 discharge temperature is not compliance, can be obtained by sampling the data analysis, the absolute pressure on the top V104 outlet temperature is more obvious, thus increasing the butterfly will V-104 and V by gas pipeline-114 vacuum control in two levels. By analyzing the internal structure of the operational status of equipment and media flow, compared to similar devices at home and abroad vacuum concentration system and analyze the impact of the device structure of the media to concentrate the whole operation of the system, and then to develop rehabilitation programs. Factors affecting the degree of vacuum through systems analysis investigation to determine the differential pressure across the valve to replace the impact on the system. Eliminate the effects of differential pressure valve replacement by questions about system operating conditions before and after the valve. Ammonia stripping urea plant evaporation pre-concentrate and concentrated vacuum system transformation, to fully absorb the majority of the technical staff, the wisdom and experience of the operator, to solve the plant operation a sequence of questions similar transformation also means transformation provides a reference for the process improvements and equipment package supervision foundation. |
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