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Safety research in the gasification process of novel multi-thermal-source coal gasifier

Mining Science and Technology 2009年第2期19卷 210-215页

作者： TIAN Yu-xian WU Min-huan WANG Xiao-gang ZHANG Ya-ping, QIANG Jun-feng TIAN Xin-wei WANG Xi-lian College of Sciences Xi＇ an University of Science ＆ Technology Xi ＇an Shaanxi 710054 China

In order to collect the gas safely produced in the gasification process of the novel multi-thermal-source coal gasifier,based on its gasification skill and the characteristics of the products,this paper analyzes the possible dangers in the gasification process,devises the gasifier eruption and explosion experiments,explores the conditions of gasifier eruption and gas explosion,studies their effects on the gasification process and establishes safe operation *** eruption hazard occurs easily in the gasification process of one-thermal-source coal gasifier when MSiO2 is far higher than that in the normal *** gas permeability in the gasifier is not the same and the power supply is too ***,similar conditions in the gasification of multi-thermal-source coal gasifier do not produce a gasifier eruption accident so *** it erupts,the gasifier should be stopped and then cooled down naturally or inert gas can be sprayed on the gasifier to cool it off,and thus gas explosion can be *** is a possibility of direct gas explosion,but it can be avoided when the gas in the gas collecting space is replaced slowly by supplying a small amount of power or the inert gas fills the space in the previous *** time a fire is lit is strictly controlled,the gas is drawn in by using the aspirator pump,and the gasifier pressure is kept in the state of micro-positive pressure in the middle and later gasification *** conclusion is that the gasification process of the novel multi-thermalsource coal gasifier is safe according to normal operation rules.

关键词： coal gasification novel multi-thermal-source coal gasifier gas explosion gasifier eruption

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