Title :
Control of an Industrial pH Process using the Strong Acid Equivalent
Author :
Wright, Raymond A. ; Kravaris, Costas ; Camp, David T. ; Wassick, John M.
Author_Institution :
Department of Chemical Engineering, The University of Michigan, Ann Arbor, MI 48109; The Dow Chemical Company, 1400 Building, Midland, MI 48667
Abstract :
The control of pH is widely recognized as a difficult problem. The Strong Acid Equivalent approach for control of pH processes consists of defining an alternate equivalent control objective, the Strong Acid Equivalent, and using a linear control law in terms of this new control objective. The Strong Acid Equivalent is calculated on line from pH measurements given a nominal titration curve of the inlet stream. Deadtime compensation is achieved in the complete control structure through use of a Deadtime Window. This approach has been implemented on an industrial pH process with unknown chemical composition.
Keywords :
Attenuation; Chemical processes; Electrical equipment industry; Industrial control; Performance evaluation; Process control; Proportional control; Testing;
Conference_Titel :
American Control Conference, 1992
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0210-9
