湿法烟气脱硫pH值分析及控制方法研究

Wet FGD pH Value Analysis and Control Methods Study

摘要: 在石灰石–石膏湿法烟气脱硫中，浆液pH值是影响脱硫系统性能的重要控制参数，本文通过对影响pH值的因素进行分析总结，确定pH计的合理安装位置，并根据排浆泵运行特点对其运行方式进行优化，同时对石灰石浆液流量控制方式进行分析，选择前馈–反馈控制系统方式，保证浆液pH值测量的准确性和一致性，达到脱硫装置长时间、连续和高效运行。

Abstract: During limestone-gypsum wet FGD, pH value of the slurry is an important control parameter that affects the performance of the desulfurization system. By analyzing the pH value of the influencing factors, it can define the reasonable installation location of the pH value, based on the operating characteristics of discharge pump to optimize the operation mode and analyse the limestone slurry flow control ways. Selecting feedforward-feedback control system mode can ensure the slurry pH measurement accuracy and consistency and achieve desulfurization unit for long, continuous and efficient operation.