PAC雾化干燥控制系统设计

A Design of PAC Spray Drying Control System

液态物料喷雾干燥技术因其被控点较多,产品质量要求严格,被控点位置相距较远等,亟需更为先进的控制系统和策略。结合喷雾干燥工艺特点,根据控制系统要求比较并选择合适的控制变量;建立基于多层控制网络的喷雾干燥塔微型计算机控制系统,同时对燃烧炉主鼓风机、引风机、送料泵等关键电气设备采用变频驱动技术实现节能降耗;研究完善干燥塔入口温度控制的变速积分PID控制算法,实现液态物料喷雾干燥系统的智能控制。

In liquid material spray drying techniques, there are many controlled vibrates, stricte product quality requirements, and control point is far away from control center, so more advanced control system and strategies are deeply demanded. Consid- ering the characteristics of spray drying process, proper control vibrates are compared, and spray drying computer control sys- tem based on multilayer control network is established. Variable frequency drive technology is used in main blower, induced draft fan feeding pumps and other critical electrical equipment. A PID controller with changing integration rate is used to im- prove drying tower inlet temperature control effect, so as to realize intelligent control in liquid material spray drying system.