Experimental investigation on agglomeration of coal-fired PM10 in uniform magnetic field

Abstract

Agglomeration experiments on fly ash particles in the size range of 0.023–9.314 μm were conducted in a uniform magnetic field. The fly particles were produced from combustion of bituminous coal originated in Dongshen, China. A dedicated fluidized bed aerosol generator was developed to disperse particles to generate aerosol with constant rate. The aerosol particles from the generator underwent agglomeration during passing through the magnetic field. The variation in particles number concentration induced by agglomeration was measured in real time by Electrical Low Pressure Impactor (ELPI). The effects of the particle size, the magnetic flux density, the particle residence time in the magnetic field, the total particle mass concentration and the average gas velocity on particle agglomeration were examined. Experimental results indicate that the removal efficiencies for the midsized particles are higher than those for the smaller and the bigger ones. Single‐sized and total particle removal efficiencies can b...