CS3000系统PID非线性增益的应用效果

某重整装置分馏部分的3个分馏塔在流程上关联性较强,一直以来3个塔的塔底液位控制无法全部投自动、波动较大,造成塔顶温度和压力也随之波动,影响装置的产品质量。将液位控制改为均匀控制后效果仍然不理想。因此,在均匀控制的基础上,通过引用CS3000系统的PID控制块的非线性增益功能并合理设置相关参数等手段,使得3个塔的液位控制全部都投入了自动控制,塔的液位、温度及压力等控制指标全部达到了生产要求,产品质量明显提高。

Application Effect of PID Nonlinear Gain in CS3000 Control System

In the reforming unit, three fractionating towers have strong correlation in the process.The obvious fluctuation in level control of the tower bottom incurs undulation of tower's top temperature and pressure which influencing product quality much.Making use of CS3000 control system's PID nonlinear gain function and reasonably setting parameters concerned to automatically control the liquid level of tower bottom was carried out, including the control over both temperature and pressure there.