earticle

영어

This study carried out an experiment in order to compare thermal characteristics after collecting dust generated in the process of disposing of waste tire, plywood flour in the process of manufacturing plywood, salicylic acid dust in the process of manufacturing functional soap, and dust in the process of manufacturing wheat powder, which has potential fire and explosion hazard. According to the results of experiment, the analysis showed that all samples subject to the experiment were in the condition where heat flux decreased and temperature decreased as the quantity of added talc was increased. This shows that decomposition rate decreased, and hazard decreased. However, in all of samples subject to the experiment, as heating rate increased, endothermic onset temperature moved to the low-temperature part, and the amount of absorbed heat was largely increased. This showed that the decomposition hazard of sample increased as heating rate increased, according to the analysis. Besides, TGA experiment results showed that thermal stability was secured because total weight loss decreased as the amount of talc was increased for all samples subject to the experiment regarding the ratio of weight loss. It is expected that the continuous research and supplementation of dust explosion mechanism in the future will contribute to the establishment of measures for the effective dust explosion prevention.

한국어

본 연구에서는 잠재적인 화재 및 폭발 위험성이 있는 밀가루 제조공정에서의 분진 및기능성비누제조공정에서의살리실산분진, 합판제조공정에서목분, 폐타이어처리 공정에서 발생하는 분진들을채집하여 열적특성을 비교하기 위해 실험을수행하였다. DSC 실험결과 대상시료 모두 활석의 첨가량이 증가할수록 열 유속은 감소하고 온도 는 감소상태인 것으로 분석되었다. 이는 분해속도가 줄어드는 것이고, 위험성이 감소 하고있는것을나타내는것이다. 그러나대상시료 모두 승온속도가증가할수록흡열 개시온도가 낮은온도 부분으로이동하고있으며, 흡열량도 크게증가하였다. 이는 승 온속도가증가할수록시료의 분해위험성이증가하는것으로분석되었다. 아울러TGA 실험결과대상시료모두 무게감량의비율은활석의양이증가할수록전체 무게감량이 줄어들어열적안정성을확보하는것으로나타났다. 향후 분진폭발메커니즘의지속적 연구와 보완이 효과적인 분진폭발예방 대책수립에 기여할 것으로 기대된다.