Model studies save money in designing of flues

AMERICAN INDUSTRY is keenly aware of the problem of air pollution and spends hundreds of millions of dollars per year to reduce pollution. Many types of equipment are used from mechanical collectors through cyclone-type collectors to high-efficiency electrostatic precipitators. Although mechanical collectors remove larger and heavier particles from industrial gases, electrostatic precipitation is required to remove particles of small size from 0.1 to 40 microns.