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高静态动作压力下粉尘爆炸泄放标准的可靠性

DOI: 10.3969/j.issn.1005-3026.2015.09.022, PP. 1316-1320

Keywords: 粉尘爆炸,泄放设计,静态动作压力,最大泄爆压力,泄放关系式

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Abstract:

粉尘爆炸泄放设计标准的可靠性对能否实现爆炸防护尤为关键.以中径70μm石松子粉尘为介质,采用20L球形粉尘爆炸装置进行了4种泄放口径、静态动作压力在0.12~0.6MPa的爆炸泄放实验,对比了实验值与NFPA68和EN14491计算值.结果表明,NFPA68在预测高静态动作压力下的泄放面积时,随着泄放口径的增大,预测结果由保守变为危险,但预测结果精度较好且数值稳定;EN14491在预测高静态动作压力下的泄放面积时非常保守,预测精度较差,数据不可靠.依据两种标准推荐的经验函数关系,分析了NFPA68和EN14491在预测高静态动作压力时产生这种差异的原因.

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