A Method to Reduce Steam Consumption of ECF Bleaching Based on Operation Optimizing

Development of paper industry has been restricted by resources, energy and environment deeply; further reducing consumption becomes an urgent problem to be solved. In this paper, the calculating model steam in bleaching process is established under premise ensuring product quality controlling cost. Then, optimization for minimizing constructed. Compared with before optimization, optimized system reduced 19.48% (0.5014 t/adt) at a loss 0.11% brightness (0.1 ISO%) 5.17% viscosity (33 mL/g). The amount chemicals should increased ensure pulp while decreasing temperature reduce consumption, cost decreased 1.62% (3.19 USD/adt) after optimization. verification experiments showed all indices can meet requirements bleached pulp.