SAFETY IN THE PLANT
per hour, as well as other factors should be considered,” says Bush. According to Bush, one of the most
versatile commercial air purifi ers for industrial applications uses multiple stages of fi ltration to remove 97% of particulate down to .01 microns and cleans up to 2,000 cubic feet per minute of indoor air. First, a prefi lter catches larger debris in the airstream like bigger pieces of dust or particulate. Next, comes two separate electrostatic cells, each with two stages of electrostatic air purifi cation. In the fi rst stage, the smoky air is drawn through the particle ioniser. Here, the smoke in the air is given a negative charge. T e second stage is a collection plate, where the charged particles of smoke and contamination are attracted to each plate and trapped. T e contaminants remain on the fi lter plates until they are removed when the fi lter is washed. Finally, an activated carbon fi lter traps
any remaining contaminants as well as odour molecules by adsorption inside the pore structure of the carbon substrate. After passing through the commercial fi ltration systems, purifi ed air fl ows back
out into the indoor work area. “Manufacturers benefi t from a longer fi ltration section because the longer the particles are fi ltered, the more likely they are to be trapped,” says Bush. He notes that the commercial air
purifi er’s fi ltration section is 10in thick, including the dual electrostatic cells that provide over 26,000in2
of
collection area for contaminated particles. T e compact dual cell design allows more air change cycles for the available space than other technologies while keeping operational noise to a minimum. According to Bush, the air purifi cation
units are often used in industrial settings like welding rooms, paint prep areas, machine shops, and manufacturing fl oors. To suit the specifi c design of the room, the units are typically hung from the ceiling by chains or mounted to a wall. In terms of reliability, the electrostatic cells in the industrial air purifi ers are built to last with non-corrosive materials. “Some of our cells have been in service for more than 30 years,” says Bush.
The contaminated indoor air is passed through a series of sophisticated fi ltration media that eliminate harmful particulate before the cleansed air is released back into the work environment
As industry seeks to safeguard worker health and increase productivity, the use of advanced smoke eater air purifi ers that continuously cleanse indoor air will become more prominent. T e ability to tailor the air fi ltration system to accommodate the manufacturer or processor’s specifi c needs will increase its adoption across an even greater range of applications.
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