Hazard Assessment of Explosion in Suspended Dust of Wood

Abstract

-Accidents of dust explosion has been occurred in various industries as a plastics, pharmaceuticals, timber, grain storage, solid fuels and chemicals. In this study, the silo dust, hammer mill dust and Nyusong dust in the manufacturing process of the particle board to utilize west wood, which were selected for this experiment and were evaluated the characteristics of dust explosion. The explosion characteristics such as a maximum explosion pressure, explosion index, lower explosive limit, and minimum ignition energy in suspended dust of the wood by Siwek 20 L apparatus were measured and evaluated for the experiment. The results of this study can be used the process safety measures to prevent accidents of fire and explosion in the suspended dust of wood.

The Complete Plastid Genome of Magnolia zenii and Genetic Comparison to Magnoliaceae species

“…This is especially pertinent seeing as subgeneric relationships within Magnolia remain contentious, with the genus found to be paraphyletic and support along the backbone of the Magnolia phylogeny is poor [20,21,22]. The ML and BI phylogenetic trees strongly supported M. zenii as a member of the section Yulania and as a sister to M. biondii , but further studies should now be done using a more comprehensive taxon sampling that includes, e.g., morphologically-similar species such as M. elliptigemmata [15], to elucidate the classification and evolutionary history of this species.…”

“…The Magnoliaceae family presents a classic Asian-North American disjunct distribution, with adequate fossil records all around Laurasia [10,11]. Members of the family also have relatively primitive flowers [12], which makes these taxa highly valuable for research in plant evolution and reproductive ecology [13,14,15]. There are widely differing opinions on the taxonomy of the Magnoliaceae, mainly regarding generic circumscription [16].…”

A Study on the Oxygen Consumption Rate and Explosion Energy of Combustible Wood Dust in Confined System - Part I: Quantification of Explosion Energy and Explosive Efficiency

“…이에 본 연구에서는 폭발에 참여하는 에너지의 양을 정 량화하기 위하여 표준대기압력조건에서 1 ㎥의 단위체적 을 기준으로 산소소모열량(Oxygen Consumption Calorie) 이라는 관점에서 분진폭발의 특성을 관찰할 필요성이 있는 것을 확인하고, 연구를 수행하였다 [14][15][16][17][18] . 본 연구를 위하여 목질판상재 제조공정에서의 분진폭발 특성을 실험적으로 규명하기 위하여, 시료분진의 형상, 평균입 도, 입도의 분포, 함유수분 및 화학적 성질 등에 따른 P max , (dP/dt) max , LEL, MIE 등의 분진폭발 특성들을 상세 히 관찰하고 [19][20] , 시료분진의 폭발압력과 산소소모열량 의 상관관계를 조사하였다. 또한 폭발에 소요되는 시료 분진의 농도에 따른 불확실성을 배제하기 위하여 공기 1 ㎥의 단위체적당 시료의 산소소모열량 (이하 '단위체 적당 산소소모열량'이라고 한다)으로 폭발시 소요되는 에너지를 정량화하였으며, 이 결과와 P max 를 통상적으 로 사용되고 있는 TNT(Trinitrotoluene) 당량 폭발모델을 수정한 모델에 적용하여 단위체적당 산소소모열량을 기반으로 한 폭발효율을 구하였다.…”