As the environmental issues on dioxin have drawn bigger attention recently in pulp & paper industry, we have been required to adopt the new bleaching method (ECF, TCF etc) which don’t use chlorine.
At Ebetsu mill of OJI SPECIALTY PAPER, we converted the bleaching method into ECF in 2003. Simultaneously, chlorine dioxide generation system was also renewed, altering main bleaching chemical from chlorine to chlorine dioxide.
In the process of generating chlorine dioxide, gas is generated first, then transformed into liquid by being absorbed in cold water.
As the conventional steam ejector cooling system requires much energy to cool down the water, we have changed to “CHILLER and Thermo-Siphon System”, the cold-medium and compressor system, making energy consumption less than before.
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