COMBINED EFFECTS OF ACOUSTIC WAVE AND GAS-SOLID JET ON AGGLOMERATION OF INHALABLE PARTICLES FROM COAL COMBUSTION PLANT

摘要

The emission of coal-fired inhalable particles, especially those with an aerodynamic diameter less than 2.5 um (PM2.5), as a serious environmental issue, have attracted much attention. The evidence on inhalable particles and public health demonstrates adverse health effects at exposures experienced by urban populations in cities throughout the world.1 Therefore, the removal of inhalable particles is one of the key problems in the field of environmental protection. Numerous particle emissions are produced from coal combustion. In general, particles greater than 10 um can be captured by conventional devices such as electrostatic precipitators, cyclones and wet scrubbers. However, the capture efficiency of filters for PM2.5 drops significantly, quantities of PM2.5 particles are emitted into the ambient air. In this paper, a turbulence field generated by gas-solid jet flow ejected into an agglomeration chamber combines with acoustic field to intensify particle collision. Combined intensification effects on particles removal are explored.