Automation Technology, Inc.

Brown and Root Industrial Services, Inc.

John B Rudd

S Keith Grayson

David L DeGroot

A control system for a countercurrent pulp washing process in which the pulp is formed as a pulp mat on at least one moving filter surface and the mat is supplied with rinse water to replace water in the pulp mat thereby reducing the soda loss in the mat before it is removed from the filter surface. The process is characterized by at least one predictable process variable including dissolved solids retained in the pulp mat. The system comprises a trainable neural network having a plurality of input neurons having input values applied thereto and output neurons for providing output values and means for training the neural network to provide predicted values for the predictable process variables.

Control system for controlling a pulp washing system using a neural

A control system and method for a continuous process in which a trained neural network predicts the value of an indirectly controlled process variable and the values of directly controlled process variables are changed to cause the predicted value to approach a desired value.

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Mobile, AL, United States of America

John B Rudd