Abstract
No. 5 boiler of Oji Specialty Paper Co., Ltd. Ebetsu Mill, Japan is a main recovery boiler in the mill, and was modified for Performance improvement since its construction of 1972.
For the reason of high cost of oil these years, further energy conservation becomes urgent top priority subject for us. We installed well proven Stacked Air System (SAS) of Anthony Ross (USA) to our No. 5 Boiler in Oct. 2006 for combustion improvement and energy saving, which was the first trial in Japan.
The result was to our full satisfaction in the various respect such as Economical merit, Increase of Through put, Reduction of Carry over Rate, Excess O2 Reduction, Improvement of Thermal Efficiency, Improvement of Steam production⁄Black liquor Ratio, Reduction of Air Heater Steam, Reduction of Soot Blower Steam Consumption, Improvement of Chemical Reduction Efficiency, Reduction of Burnable Gas, Less Emission⁄TRS and Prolonging of Run time.
The installation work could be completed within the shut down time of 11 days. We would like to introduce our experience about the combustion improvement work with SAS, including the economical effect and the outline of the modification of the system.
