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在一内径92mm,高1000mm的不锈钢充气喷动床反应器内,以三种不同直径的玻璃珠为惰性粒子,采用五种不同的粉末物料为微细粒子,以空气为充气和喷动气体对微细粒子进行淘洗,综合考察了设备结构,物性,以及操作方式等对充气喷动床内微细粒子的析出率的影响.结果表明:五种粉末物料的析出率均随喷动气速的增加先增加而后变化不大,且粉末粒径越小,粒径分布越均匀其析出率越大;对同一惰性粒子床层的高度有一适宜床高;随着惰性粒子粒径增加,粉末物料的析出率先降低而后增加;当充气速度达到最大允许充气速度时粉末物料的析出率最高;随着床层温度的增加,粉末粒子的析出率有所增加.
In a stainless steel aerated spouted bed reactor with an inner diameter of 92 mm and a height of 1000 mm, three different diameters of glass beads are used as inert particles, five different powder materials are used as fine particles, air is used for aeration and sparging gas to fine The effects of equipment structure, physical properties and operation mode on the precipitation rate of fine particles in an inflatable bed were comprehensively investigated.The results showed that the precipitation rate of five kinds of powder materials increased first with the increase of the spouting gas velocity And then change little, and the smaller the particle size of the powder, the more uniform the particle size distribution of the greater the rate of precipitation; the height of the same inert particle bed has a suitable bed height; with the increase of the particle size of inert particles, the precipitation rate of the powder material first decreased And then increase. When the inflation rate reaches the maximum allowable inflation rate, the precipitation rate of powder material is the highest. With the increase of bed temperature, the precipitation rate of powder particles increases.