Bullseye Factory Filtration is Underway | News Releases

Bullseye Factory Filtration is Underway

FOR RELEASE March 29, 2016—Meet the newest member of Bullseye Glass Co.'s hard-working family: the first baghouse filtration system currently under construction at our Portland factory.

As a pilot project, this unit (which has been named Maggie by the crew doing the installation) will filter a single furnace to test emission levels and to determine the impact of the baghouse on furnace operation. A larger system of baghouses is in the design and permitting phase.

"There is a lot still to learn," says Bullseye President Daniel Schwoerer. "Baghouses for furnaces as small as ours are relatively new territory for the professionals we're working with."

Here's how a baghouse system works: Air from the furnace passes up the stack and into a filtration chamber containing a series of pleated Teflon bags that filter out 99% of the particulate material. When the particulate buildup on the surface of the bags becomes great enough to cause a pressure drop they're automatically purged. The purging cycle takes about 30 seconds, during which the filtered material in the bag falls into a container. The bags should last about two years, depending on how frequently they are purged.

What happens to the filtered particulate? The material will be collected and disposed of by a certified hazardous waste company.

The pilot baghouse is being built in consultation with environmental engineers from the Bridgewater Group in Lake Oswego and Serbaco, a Portland-based firm specializing in industrial emissions control.

Testing and validation will be done in conjunction with The Oregon Department of Environmental Quality. We expect the first melt to be a run of Clear glass, followed by a run containing cadmium. If all goes well, Bullseye will be back to producing small runs of red, yellow, and orange glasses later this spring.

Air Quality Team

  • Each of these 'horns' will have a Teflon filtration bag attached.
  • The pilot baghouse ready for installation.
  • The pilot baghouse rises toward the ceiling.