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应用多组分精馏原理,从设计角度对精馏装置运行的不稳定故障进行诊断,考察了回流比、回收率、进料温度和热状态对塔的加料位置和实际塔板数的影响;同时应用正交设计优化各工艺条件。方案为A501塔分离任务仍不变,将A502塔的高度由原来的2．2米增加到12米,加料板位置调整在8．5 m高度处;塔前增加一台换热器,控制进料温度150℃。操作数据证明:故障判断准确,处理有效,获得了较好的经济效益。
The principle of multicomponent distillation was used to diagnose the unstable operation of distillation unit from the perspective of design. The effects of reflux ratio, recovery rate, feed temperature and thermal state on the feeding position of the tower and the actual number of plates were investigated. Orthogonal design is also applied to optimize the process conditions. Program A501 tower separation tasks remain unchanged, the A502 tower height increased from the original 2.2 meters to 12 meters, the feed plate position adjustment at a height of 8.5 m; tower before the addition of a heat exchanger, control into Material temperature 150 ℃. Operating data to prove: failure to determine accurate, effective treatment, access to a better economic benefits.