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Korean Chemical Engineering Research,
Vol.57, No.4, 492-500, 2019
Vol.57, No.4, 492-500, 2019
순환 유동층 보일러에서 석탄 연소 시 Borax Solution이 연소 배가스중 미세먼지 저감에 미치는 영향
The Effect of Borax Solution on the Reduction of Fine Particles in Flue Gas at a Commercial Circulating Fluidized-bed Boiler Firing Bituminous Coal
본 연구에서는 9.2 MWe의 상용규모 순환유동층 보일러에서 화학첨가제 사용에 따른 미세입자 저감에 대한 영향을 확인하였다. 또한 화력 발전소에서 화석연료의 연소 중 발생하는 미세입자를 포집하기 위하여 간단하고 효과적인 포집설비를 개발하였다. 연소 배가스 중 PM 10이하의 입자를 감소시키기 위하여 화학첨가제를 사용하였으며, 사용한 화학첨가제는 borax solution을 사용하였다. 포집된 미세입자 중 PM 10이하의 입자 거동을 확인하기 위하여 입도분석기와 SEM 분석을 통해 확인하였다. Borax solution은 배가스중에 용융된 미네랄을 흡수하여 미세입자를 성장시키는 경향이 있는 것을 알 수 있었다. 결과적으로 borax solution을 사용함으로써 10 μm 이하의 미세입자가 감소되었음을 확인할 수 있었다.
In this study, the effect of chemical additives on the reduction of fine particles was identified in 9.2 MWe commercial scale circulating fluidized bed boiler firing bituminous coal. Futhermore, a simple and effective method of fine particle collection has been developed to collect the fine particles of the boiler during fossil fuel combustion. Chemical additives were used to reduce particles below 10 PM in the flue gas, and borax solution was used as a chemical additive. In order to identify the particle behavior of PM 10 or less among the collected fine particles, it was analyzed through particle size analyzer and SEM analysis. The Borax solution tends to absorb molten mineral in the flue gas and make fine particles grow. As a result, it was analyzed that particles smaller than 10 μm were reduced by using borax solution.
Keywords:
Circulating fluidized bed combustion; Borax Solution; Fine particles; Particle size distribution
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