燃煤可吸入颗粒物在高梯度磁场中的捕集试验研究

针对3种不同磁特性的燃煤可吸入颗粒物(PM10),利用高梯度磁场试验装置进行了颗粒捕集的试验研究,用电气低压冲击器(ELPI)实时测量了颗粒浓度的变化.结果表明:开启磁场后燃煤可吸入颗粒物捕集效率的变化可分为缓慢提高、快速提高和稳定3个阶段;饱和磁矩较大的样品,其捕集效率较高;增加磁场强度和磁介质的填充率可以提高燃煤可吸入颗粒物的捕集效率;而气体流速的增大则会导致颗粒捕集效率降低.试验表明,高梯度磁场捕集燃煤可吸入颗粒物是一种新型有效的方法.

Experimental Study on Capturing of Originated Coal Combustion Inhalable Particle in High Gradient Magnetic Fields

Studies on capturing of inhalable particles,originated by combustion of coals possessing three different magnetic properties,have been conducted on a test rig,which incorporates a high gradient magnetic field,with variations of particle concentration real time measured by an electric low pressure impactor(ELPI).Results show that,after turning on of the magnetic field,variation of inhalable particle capturing efficiency proceeds in three stages:it first slowly rises,then quickens and finally stabilizes at a certain value;the capturing efficiency is higher for samples with saturated magnat moments;a higher efficiency can also be obtained by raising the magnetic field intensity and the fill up ratio of the magnetic medium,while increasing gas velocity causes the efficiency to drop.Experimental results indicate that the employment of high gradient magnetic fields is an efficient new way of capturing inhalable particles originated form the combustion of coal.Figs 11 and refs 10.