Online pH monitoring and control of radioactive waste liquid in evaporation treatment system

A compound control method which has different control algorithms at different slice time or different condition is adopted to solve the problem of pH monitoring and automatic control of radioactive waste liquid in an evaporation treatment system. Both the feed forward and backward functions are utilized in the method. The architecture and work manner of the pH monitor and automatic adjustment system is introduced, as well as the control algorithms at different condition. The method can diminish the effects caused by the nonlinearity and lag characteristics of radioactive waste liquid pH control, and achieve properly the automatic adjustment of pH value of the loading waste liquid for the evaporation treatment system. (authors)