尿素装置蒸发系统打循环不仅影响尿素产品质量,而且增加装置综合能耗。针对蒸发系统打循环的原因,采取了对一分分离器液位调节阀(L3阀)维护保养、二段分解加热器进行化学清洗、改进喷头过滤器等措施,蒸发系统打循环次数明显减少,尿素成品优质品率达99.72%。 Urea device evaporation system to play a loop not only affect the quality of urea products, but also increase the device integrated energy consumption. Aiming at the reasons of the circulation of the evaporation system, some measures such as the maintenance of the splitter level control valve (L3 valve), the chemical cleaning of the second-section decomposition heater and the improvement of the nozzle filter were taken, the number of cycles of the evaporation system was obviously reduced, Urea finished product quality rate of 99.72%.