자동제어 건조공정을 이용한 바이오폐기물의 고형연료화 특성 연구 = A Study on the Solid Refuse Fuel Characteristics of Bio-Waste Using Automatically Controlled Drying Process

다국어 초록 (Multilingual Abstract)

This study analyzed the physicochemical properties and combustion characteristics of dried food waste and agricultural by-products to evaluate the feasibility of biowaste as a solid fuel product. The drying performance of food waste was confirmed by using a closed steam recirculation dryer and an automatic shutdown control system equipped with a moisture intensity sensor. Elementary analysis, proximate analysis, calorific value analysis, and TGA analysis were conducted on 4 types of food waste samples including coffee grounds and 3 types of agricultural by-product samples. When the automatic shutdown control system was applied, the drying performance and drying efficiency were improved by 10.7% and 10.6%, respectively, and it was possible to obtain the effect of reducing the drying time and energy consumed for drying. The moisture content of the dried food waste and agricultural by-product was 0.5 ~ 9.14wt.%, and the ash content of them was 3.3 ~ 12.5wt.%, which satisfied the quality standards of Bio-SRF. The low calorific value of dried food waste was 4,000 ~ 4,710 kcal/kg, and the low calorific value of agricultural by-products was 3,250 ~ 3,770 kcal/kg. Dried food waste and agricultural by-products meet the Bio-SRF standards and have a high low calorific value. Therefore, it is judged that if the drying technology applied with the automatic shutdown control system is used for solid fuel manufacturing, it can contribute to vitalizing the domestic SRF market.