Experimental research on combustion and explosion characteristics of medium density fiberboard on building

Abstract

Abstract In recent years, the amount of medium density fiberboard(MFD) used in the construction industry is huge. The dust produced in the production has a great risk of dust combustion and explosion in different thermal runaway environment. Therefore, this paper takes the MDF dust as the research object to explore its combustion and explosion characteristics. The minimum ignition temperature of dust layer and 20L explosion vessel were used to study the changes of minimum ignition temperature(MIT) and combustion morphology of dust layer with different particle sizes of wood powder, and the influence of different influencing factors on the maximum explosion pressure was analyzed. The results show that with the decrease of particle size, the MIT decreases from 350°Cto 260°C, the maximum heating rate increases, the carbonization phenomenon becomes more obvious, and the maximum explosion pressure increases gradually; Under 200 mesh dust, with the increase of mass concentration and ignition delay, the maximum explosion pressure first increases and then decreases, and 50 g/m3 and 60 ms are the best mass concentration and ignition delay.