基于Harmonas的天然气调压及混合液化气热值DCS设计

由于燃气的组分不同、开采时间不同、相同燃气的产地不同,其热值存在着很大的差异,需要经过热值调节,使其热值稳定才能安全地投入使用;大多采用的热值控制方案是将调后的混合气热值作为被控对象,采用PID调节仪和气动调节阀组成简单的单回路控制系统;本系统的方案设计中控制器采用Harmonas(DCS)、带智能阀门定位器的气动薄膜调节阀为执行机构、智能III型组合检测装置,实现了系统控制方案的高要求和高精度。

Design of DCS of Natural Gas Pressure Regulating and Heating Value Adjusting of Mixed Gas Based on Harmonas

The gases can be used only if their heating values are controlled to be steady because the heating values are very different owing to different components of different gases,different exploitation time,different producing areas of same gases and so on.In a general way,the control projects of heating value is a simple single loop which is composed of PID regulator and pneumatic control Valve.In this paper,Harmonas controller,pneumatic diaphragm control valve with Intelligent Valve positioner and intelligent ...