CPS-based Slurry pH Control in Wet Flue Gas Desulfurization System

In this paper, with the increasing requirement on the abatement of SO2 emission in flue gas, cyber-physical system (CPS) is introduced into the limestone wet flue gas desulfurization process. The slurry pH value, a key factor affecting the flue gas desulfurization rate, is analyzed and controlled in the context of cyber physical system on the basis of four stages, namely, state perception, real-time analysis, scientific decision and precise execution. The simulation result reveals that the slurry pH value can be controlled effectively both in accuracy and timeliness in the context of CPS. Meanwhile, the on-site data provides a compelling evidence that pH control in the context of CPS outperforms that in traditional wet flue gas desulfurization system.