Further modifications to the Mulgrave mill evaporator station for continuous crushing

Evaporator cleaning has long presented problems to factory operations, and continuous crushing increases these. At Mulgrave Mill, crushing season maintenance was tied to long maintenance stops which were scheduled in accordance with the necessity to clean evaporators. This paper describes modifications made to reduce the time required for evaporator cleaning. These included a new chemical handling and distribution system, altered juice feed arrangement, and the use of conductivity measurement for the control of juice flow. Better results have been achieved in a shorter time as a result of this installation. More flexible factory operations have resulted, with advantage now able to be taken of unscheduled stops. The number of cleaning stops has been reduced significantly. An alternative juice feed system has proven effective, and the use of conductivity measurement of control juice flow through evaporator effects containing mUltiple vessels has also been proven.