Recovery Boiler Technology in Japan, 2001 Engineering / Finishing & Converting Conference Proceedings
H. Tran, Y. Arakawa--Kraft pulp mills in Japan generate 42,000 metric tons/day of black liquor dry solids that need to be burned in
recovery boilers. High-energy costs and stringent environmental regulations in recent years have directed the
recovery boiler technology toward co-generation, high steam temperature and pressure operation, and waste heat
recovery. New recovery boilers are commonly equipped with chloride and potassium removal systems for
deposit accumulation control, quaternary air systems for NOx control, and high temperature corrosion resistant
materials for waterwall and superheater tube protection. The advanced technology helps recovery boilers to
operate continuously at a high efficiency without plugging and corrosion problems.