폐기물 고형연료의 순환유동층 연소기술의 시범을 위하여 파일롯트 규모 순환유동층 연소보일러를 설계하고 건설하였다. 보일러의 규모는 출력기준 약 6 MWth에 해당하며 증기질은 400 ℃, 38 ata로 설계하였다. 최대 증기출력은 약 8 ton/h에 해당한다. 연료는 RDF로 휘발분을 주성분으로 하며 점화가 빠르고 연소성이 매우 뛰어났으며 보일러의 연소효율은 99.5%를 능가하였다. 순환유동층 RDF 연소의 안정성은 연료중 회분 이외의 이물질의 존재 여부와 신속한 배출 가능성에 크게 의존하였다. 오염물질의 배출농도는 염소를 제외하고는 법적 기준치 이내에 들었다. 또한 60% 정도의 연료중 염소는 비산재에 흡수되는 것으로 나타났다. HCl을 국내 법 규제에 맞추어 제어하기 위해서는 건식 또는 습식 흡수 장치와 같은 별도의 환경설비가 필요하였다.

A pilot scale circulating fluidized boiler (CFB) for refuse derived fuel (RDF) is designed and constructed to demonstrate a performance of CFB technology for waste fuel utilization. The boiler has a design capacity of 6 MWth with 400 ℃ 38 ata steam generation performance. The maximum steam rate of the boiler was about 8 ton/h. The main component of the fuel was RDF (Refuse Derived Fuel) with high volatile contents and showed fast ignition and easy combustion. The pilot plant showed over 99.5% of combustion efficiency. Stable operation of RDF CFBC depended on the content of non combustion materials other than ash and fast removal of them. Emission level was under legal limit except that of HCl without external flue gas treatment facilities. Also about 60% of fuel chlorine was absorbed to fly ash particles. For HCl emission control flue gas treatment technology is required such as wet and dry scrubber in order to comply with Korean regulation.

Circulating Fluidized Boiler (CFB) Refuse Derived Fuel (RDF) Combustion

Ministry of Environment, “Amendment of the Enforcement Decree of the Waste Control Act,” ME Decree, 220 (2006)
Ministry of Environment, “Amendment of the Enforcement Decree of the Clean Air Conservation Act,” ME Act 8207 (2007)
Basu P, “Combustion and Gasification in Fluidized Beds,” CRC Press (2006)
Shun D, Bae DH, Lee SY, Kim MS, “Development of CFB RDF Combustion and Co-generation Demonstration Plants,” The ninth Asian Conference on Fluidized-Bed and Three-Phase Reactors., 79 (2004)
Shun D, Bae DH, Lee SY Jo SH, J. Korean Inst. of Resources Recycling., 15(1), 58 (2006)
Shun D, Bae DH, Han KH, Cho SH, Lee SY, HWAHAK KONGHAK, 40(3), 345 (2002)
Shun D, Bae DH, Jin KT, Lee CK, Park JH, Han KH, Jo SH, Ryu HJ, Lee SY, “Development of Circulating Fluidized Bed Cogeneration System for RDF,” Research paper of Korea Institute of Energy Research., KIER-A66705 (2007)
Lee HS, Yun JK, Bae DH, Shun D, J. Korean Society of Waste Management., 21(4), 369 (2004)
Shun D, Bae DH, Kim DC, Park HC, J. Korean Society of Waste Management., 23(1), 81 (2006)