ADVANCED BROWNSTOCK WASHER CONTROL - SUCCESSFUL INDUSTRIAL IMPLEMENTATION AT MACLAREN,JAMES

This paper discusses the implementation of a control strategy on a mul tistage countercurrent brownstock washing system. The approach taken i ncludes three parts: dynamic simulation of the system, design of a con trol strategy, and the implementation at the pulp mill. Each of these parts is covered in details from an industrial point of view and with special attention given to fundamental control issues such as anti-win dup and bumpless transfer arrangements. These issues were found to be essential for the successful operation of the system.