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- W2181695595 abstract "In Kobe Steel Ltd., an incineration system for processing low-level radioactive polymeric solid waste has been developed, which was necessary from the viewpoint of waste volume reduction in Japan. The furnace of this incineration system has the following features: • A controlled air type fix-bed furnace with a unique grate design . • In order to control dioxins emission, the furnace wall is refractory -lined to maintain the furnace temperature at 1273K or higher. • For reduction of CO emission, which has correlation with dioxins, the incinerator adopts air -stage combustion and contr ol of combustion air, which is injected separately into the primary combustion zone from the grates and the secondary combustion zone from the second airports. • This incinerator adopts intermittent supply (batch supply) and the storage box is fed as it is. This paper introduces concepts of the new incineration system, acquisition of evaluation data for design of the furnace in a pilot test and an estimation of the performance of a commercial plant. In the pilot test, combustion characteristics of plastic and rubber wastes were evaluated including the combustion rate and emissions of unburned combustible contents. Although the combustion rate of plastics is higher than rag paper and cloth, the pressure fluctuation is not excessive which shows that it can be contro lled. Moreover, there is only slight emission of unburned contents. A new grate for plastics incineration was also developed. In the pilot test, tests were done for the following points: cooling performance, sticking of unburned combustible contents and leak of p lastic wastes through the grate after melting. The new grate performed well under the test conditions, which shows that the grate can be of practical use. In the pilot test, process performance was evaluated , and the following results we re obtained. In a secondary-air controlled test for reduction of dioxins, good results were obtained which gave rise to optimism that an emission rate of 0.1ng/Nm3TEQ can be achieved. Estimation of pressure fluctuation can be predicted from the furnace temperature and pressure loss at the flue gas duct. As for prediction of the performance of a commercial plant, prediction of furnace pressures fluctuation, evaluation of operation pattern and evaluation of the scale up of the furnace by clinker trouble were carried. Finally, operating temperature guidelines for a commercial plant were obtained, as the primary combustion zone is between 923K and 1373K and the furnace exit temperature was over 1123K." @default.
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- W2181695595 date "2001-01-01" @default.
- W2181695595 modified "2023-09-24" @default.
- W2181695595 title "DEVELOPMENT OF AN INCINERATION SYSTEM FOR THE LOW-LEVEL RADIOACTIVE SOLID WASTE" @default.
- W2181695595 hasPublicationYear "2001" @default.
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