Blue Smoke Control / Stages of Filtration

Butler-Justice Inc. has been designing blue smoke control systems for the hot mix asphalt industry for several years. Blue smoke is actually tiny oil droplets that make-up the blue haze that is typically associated with paving as well as the production of hot mix asphalt. It’s the blue haze that carries much of the characteristic asphalt odor. Air pollution control agencies are becoming more concerned with blue smoke, especially as RAP, rubberized asphalt and polymer blends are more routinely specified. These specialty mixes produce an increased amount of blue smoke. More blue smoke means a greater number or neighborhood complaints for visible emissions and odor, all of which results in more frequent inspections and higher potential for being “written up” by the air pollution cops.

All stages of filters are readily accessible through the filter access doors. Filters or stages are installed two deep behind each door.

Each of the first 4 stages are readily accessible. The filter removal handle, illustrated here with the first stage partially removed, enables access to the back filter without reaching deep into the collector.

The fifth, sixth and seventh stage filters are accessible without reaching deep inside the collector. The filter removal handle enables the rear filter to be pulled out to access the opening for service.

THE BLUE SMOKE FILTER CARTRIDGE COLLECTS SMOKE LIKE NOTHING ELSE

The Blue Smoke Control filter cartridge is made from proprietary filter media developed exclusively for collecting oil mist. This media, combined with a special outer wrap, allows the filter cartridge to drain and prevents the collected liquid from entering the clean air stream.

In addition, Blue Smoke Control filter cartridges sit vertically inside the collector, allowing gravity to aid the draining process. The result is more complete capturing of the oil droplets, easier maintenance and higher filtration efficiency.