ON THE STUDY OF MEASUREMENT APPARATUS FOR PARTICLE CONCENTRATION AND ESTIMATION OF PARTICLE-SIZE BY LOG-NORMAL DISTRIBUTION IN GAS-SOLID PIPE-FLOW

Experimental and theoretical studies have been conducted on a method f or measuring particle concentration and size distribution in gas-solid pipe four. The measurement can be done continuously and automatically by the use of anisokinetic sampling. The total mass of the sampled pa rticles, cyclone and filter box is measured by an electronic mass bala nce. The mass of the collected particles is proportional to the measur ement time. In the reduction of experimental data, mass median diamete r and geometric standard deviation are determined uniquely by the use of Levin's Equation and the steepest descent mtehod. Particle size dis tribution obtained in this way agrees well with the conventional impac tor method.