Energy saving in the bleaching plant - Steam saving examples by raising the temperature of hot water

Nippon Daishowa Paperboard Yoshinaga.,Co Ltd. has been trying to expand the use of recycled paper with taking advantage of a good location near the Tokyo metropolitan area. New No. 5 incinerator has been operated from December 2002 for the purpose of incinerating paper sludge and generating power for mills facilities. But a consumption of fuel oil has been continued at a high level, then we have lost significant earnings as a result of a sharp oil price increase in recent years, we have felt a strong need for energy saving. No. 1 bleaching plant is located apart from the cooking plant and the chemical recovery plant, so it can not use the heat from black liquor. For the reason, it consumes the large amounts of steam. This report describes steam saving examples by raising the temperature of hot water with using the heat of absorbent in No. 5 incinerator desulfurization equipment.