This is an ongoing piss-off with inspectors and municipalities.
Where I live there are breweries (50HL) that mill in a “room” made of poly curtains, one that mills in a sea can on the owner’s driveway,, and they wanted me to build a 24’ tall, 12’x 12’ concrete block “chimney” to direct the blast skyward... I declined that suggestion.
I’ve looked and looked and looked, and could not find any data for a brewery mill. I did find the details of what is required to have a plant explosion - particle size, % in the air, etc - and a brewery mill could run uncleaned for decades before it’d even be close. My architect and I are actually planning on doing a journal article (with some test data using sieves) on this topic to try and put an end to the shit-show that this is.
After all my reading, I think that a few hours with a sheet-metal-smith to make an enclosure, and a basic grounded wood shop vac should be more than enough, and reasonable, and affordable, but hey, who am I??
JR
Jeremy Reed
Co-Founder and President, assistant brewer, amateur electrician, plumber, welder, refrigeration tech, and intermediately swell fella
The North of 48 Brewing Company
Regina, Saskatchewan, Canada
www.no48.ca