OPT800 Vapor is an Advanced Process Control (APC) solution for controlling and monitoring of the multiple-effect evaporation plant. Using a multivariable model-based approach, the solution controls the strong liquor production rate and dry solids content to minimize energy consumption and increase evaporation plant capacity.
Black liquor evaporation is a very important part of the recovery process. The evaporation unit provides the link between the fiberline and recovery sections and plays a major role in the operation of pulp mills.
Ensuring the production of strong black liquor with on-target dry solids content and minimum variability is the key to stabilizing the recovery section and optimizing steam utilization. The multi-effect evaporators use low and medium steam pressure to transform weak black liquor with a dry solids content of 15-20% into strong black liquor with a dry solids content of 80-85%.
OPT800 Vapor solves these challenges by providing tighter control of the evaporation process, reducing variability of the black liquor quality while also lowering operating costs and increasing capacity.