| 英文摘要 |
Polyvinyl alcohol (PVA), a combustible chemical, is a polymer compound through polyvinyl acetate and saponification process.It is mainly used to manufacture polyvinyl acetate, and serves as resistance to gasoline pipelines and polyvinyl alcohol fibers. With thedevelopment of modern industrial technology, a wide variety of chemical materials have been used worldwide. As a result,combustible powder explosion has been found to occur frequently. To meet with this problem, caution needs to be taken for each stepof the manufacturing process of combustible powders. In this study, the 20-L apparatus, minimum ignition energy apparatus (MIEA),minimum ignition temperature for dust cloud (MIT-C), and minimum ignition temperature for dust layer (MIT-L) were used toestablish dust explosion parameters measurement of the polyvinyl acetate manufacturing process. According to the 20-L apparatusexplosion vessel tests, maximum dust explosion pressure rise rate (Pmax) was 6.9 bar and maximum dust explosion pressure rise rate(dP dt–1)max was 137 bar s–1. The Kst value of PVA was St–1, categorized as a weak explosion. In order to prevent loss and incidentalmitigation resulting from dust explosion, it is vital to fully survey the dust explosion parameters of PVA. |
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