Investigation on inhibition characteristics of bicarbonate on hybrid explosion of ethylene/polyethylene mixture

doi:10.16265/j.cnki.issn1003-3033.2024.08.1669

Abstract

Abstract:

In order to prevent and control the explosion hazards of ethylene/polyethylene hybrid mixture, bicarbonate was selected as the explosion suppression powder, and the explosion suppression experiment was carried out in a 20 L spherical explosion device to explore the explosion inhibition effect and mechanism of different bicarbonate on ethylene/polyethylene hybrid mixture. The differences of explosion inhibition performance of different bicarbonate on the hybrid mixture were discussed. The results show that the hybrid mixture is more difficult to inhibit than the single-phase polyethylene. With the increase of ethylene concentration, the explosion inhibition of the hybrid mixture becomes more difficult. The bicarbonate has an inhibitory effect on the ethylene/polyethylene hybrid mixture with different concentrations, and the inhibition efficiency is affected by the concentration of ethylene and bicarbonate. Bicarbonate can inhibit the ethylene/polyethylene hybrid explosion through physicochemical reaction during the polyethylene explosion. The decomposition and endothermic properties of potassium bicarbonate and its retardation effect on polyethylene pyrolysis are better than those of sodium bicarbonate, so the inhibition effect of potassium bicarbonate on the explosion of ethylene/polyethylene hybrid mixture is better than that of sodium bicarbonate.

Key words: bicarbonate, ethylene, polyethylene, hybrid system, explosion suppression characteristic

CLC Number:

X937

JI Wentao, XU Zihui, MAO Wenzhe, YANG Shuaishuai, ZHANG Guotao, WANG Yan. Investigation on inhibition characteristics of bicarbonate on hybrid explosion of ethylene/polyethylene mixture[J]. China Safety Science Journal, 2024, 34(8): 138-146.

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介质	名称	乙烯体积分数/ %	聚乙烯质量浓度/ (g·m^-3)	爆炸压力/ MPa	爆炸压力上升速率/ (MPa·s^-1)
聚乙烯	A	0	400	0.63	59.01
两相	B	2	200	0.71	64.25
	C	4	100	0.76	72.40
	D	6	50	0.79	76.12
乙烯	E	8	0	0.82	80.91