煤介质阻挡放电脱硫的影响因素分析

Analysis of Influence Factors on Coal Desulfurization with Dielectric Barrier Discharge

依据介质阻挡放电理论,对原煤进行煤介质阻挡放电脱硫实验。实验结果表明,煤介质阻挡放电脱硫的影响因素与电极结构、介质成分和气隙距离等因素有关,如将介质放到放电间隙中间时脱硫的效果没有将介质直接放在放电极板上的脱硫效果好,加煤的情况下微放电的强度明显大于不加煤的微放电过程强度;脱硫效果呈"U"字型变化,由此推论,在一定的外界条件下,煤介质阻挡放电除硫有一个最佳的施加电压;随着电压的增加,放电脉冲的相位范围逐渐扩展。

According to the theory of dielectric barrier discharge, coal desulfurization experiment of dielectric barrier discharge was done. The experiment result showed that influence factors of coal desulfurization with dielectric barrier discharge are electrode structure, medium composition and air-gap distance, for example, desulfurization effect of putting medium on discharge board is better than the one of putting medium in air-gap, the intensity of microdischarge of adding coal is stronger than that the one of unadding coal; the desulfurization effect changes in ＂U＂ type, so it can be deduced that desulfurization has a best applied voltage in certain external conditions with dielectric barrier discharge; the phase scope of discharge pulse expands gradually with increase of the voltage.