| OCR Text |
Show 8. Conclusion As there is a chronic shortage of landfill site in Japan, MSW is being incinerated mainly for the purpose of reducing its volume. Therefore, despite the large number of 1 ,900 incineration facilities, there are only 1 30 plants which are equipped with power generating equipment. Most of the rest operate only during daytime, have no boiler, and cool the flue gas with water. Heat recovery, if practiced at all, is only for space heating. With Intermittent operation, dioxin formation at start-up and shut-down is suspected. However, it should be noted that those with power generation are usually the large ones, and these process approximately 45% of the MSW incinerated in Japan which amounts to 73% of her total waste of 120,000 mit per day. For further dioxin reduction, it is anticipated that continuous furnace operation will be mandated in future. Also, the significance of refuse-to-energy itself will be emphasized as the utilities are now encouraged by law to buy power from small scale generators. This in turn will demand improvements in power generation technology. With increasing need to reduce emissions, a highly efficient power generation combined with reburning technology will be the key for solving the waste management of the future. 9. Acknowledgment The reburning technology was developed by The Institute of Gas Technology and has been tested and proven its effectiveness in reducing NOx and CO simultaneously by 50%. Our test has endorsed it under different set of circumstances. This technology does not require specialized equipment, and comes with an additional div~ dend of energy saving. We are certain of its big possibilities. I wish to thank the manager and staffs of the incineration plant who cooperated untiringly with us in such areas as modification of the furnace and the running of the plant. My appreciation also goes to the management of Tokyo Gas Company and Toho Gas Company which supplied natural gas, and gave us support for this project. References (1) Miyatera, "Removal of Nitrogen Oxides by Hydrocarbons," Fuel Association Vol.67 No.1 0 (2) Wakamura & Sameshima, " Simultaneous Control of NO x & COby Natural Gas Reburning, n Proceedings of Kyoto University Hygienic Technology Symposium No.13 (3) Sameshima & Asou, "High-Efficiency Waste-To-Energy Power Generation with Natural Gas, n Proceedings of Japan Society of Mechanical Engineers, Thermodynamics Symposium No.8 13 |
