国产废酸再生工艺裂解炉温度控制系统改进方案

Improvement scheme for temperature control system of domestic spent acid regenerating cracking furnace

国产干法废酸再生工艺裂解炉温度控制系统较为简单,自动化水平低,在裂解炉温度控制过程中,助燃空气的量不能根据燃料气流量的变化及时做出调整,极易造成裂解炉炉膛内氧含量发生波动,对工艺影响较大,严重时甚至引起炉膛爆炸。通过对国内各大炼厂及各主流废酸再生工艺的调研,对现有国产废酸再生工艺裂解炉温度自动控制系统提出了两套改进方案:一是基于传统PID控制方式的优化改进方案,二是基于先进过程控制(APC)方式的智能控制方案。采用多因素联动控制,能够使裂解炉温度控制更加自动化、智能化和精细化,整个控制过程更加安全、稳定,为同行提供参考。

The current domestic dry spent acid regeneration process cracking furnace temperature control system is relatively simple,low level of automation,in the process of cracking furnace temperature control,combustion-supporting air quantity can not timely adjusted according to the change of the fuel gas flow,easy to cause fluctuations in cracking furnace hearth oxygen content,to a greater influence on the process,serious when even cause furnace explosion.Through the investigation of the domestic major refineries and the mainstream spent acid regeneration process,two sets of improvement schemes are proposed for the existing domestic waste acid regeneration process cracking furnace temperature automatic control system:one is the optimization and improvement scheme based on the traditional PID control mode,the other is the intelligent control scheme based on the advanced process control(APC)mode.The multi-factor linkage control makes the temperature control of cracking furnace more automatic,intelligent and fine,and the whole control process is more safe and stable,which can be used as a reference in the industry.