첨가제 펠릿을 이용한 목재 펠릿보일러의 타르 감소와 열효율 분석

초록

Wood pellets are ‘carbon natural’ fuels that contribute to greenhouse gas reduction regulation. On the other hand, the tar, generated from woody biomass combustion, condenses and accumulates in the combustion chamber resulting in a reduction of heat transfer on the surface where heat exchange takes place, which decreases the thermal efficiency and equipment life span. To solve these problems, an additive acting as a catalyst for a reforming reaction was mixed with the pellets to reduce tar formation in combustion. For the experiment, 2% of dolomite, 2% of limestone and 1% mixture of dolomite and limestone were added as catalysts to the wood pellets. The experiments were conducted in the same external environment and a comparison of the thermal efficiency and reduction of tar of boiler containing the solid additive was carried out. As a result, the thermal efficiency of the additive pellets was increased by 1.09% and 0.36% for dolomite 2%, limestone 1% and dolomite 1%, respectively, compared to conventional wood pellets, and decreased by 0.46 for 2% lime stone. Although the thermal efficiency of the dolomite 2% additive pellets was the highest,pellets with 1% dolomite and 1% limestone produced the best result.

키워드