Intro: Miss Betsy's Cold Smoke Generator
Fall is already here, the days are cool and unlikely to push the thermometer over 70F, which means perfect weather to make bacon!
Last time I made bacon I used a pretty complicated arrangement of a stove and stove pipes to cool the smoke and guide it into my smoke chamber; this time I made myself a small and easy to maintain "Cold Smoke Generator".
16/14 oz. can
36 oz. coffee can
#6 metal screws
8" piece of 3/8" iron pipe
Several brass and copper fittings and pipe (get your idea from the pictures)
1/4" O.D. plastic hose
Some kind of feet (I used 3 shelf brackets) Make sure the apparatus doesn't tip over and set your house on fire!
An old aquarium air pump. (Even a new one isn't too expensive ~ $20).
Wood pellets or Hardwood! saw dust to fire the thing up.
Tools you should have and which will make completion of this project a lot easier -_^
Drill / Drill-stand
Step 1: Main Parts
I decided to use a 16oz. can as burner chamber and a coffee can as reservoir for the wood pellets. Should be available in every household.
Step 2: Attaching the Burner
Put the smaller can centered in the middle of the bottom of the coffee can and mark with a pen. I divided the circle in 8 pie shaped pieces and drilled a hole in the middle of this circle. With the help of a jigsaw I cut along the lines so that I could connect these 2 cans. Bend the sheet metal up, set the smaller can on top and use metal screws to secure it.
Step 3: Preparing the Venturi Tube
In my parts drawer I found this 8" piece of 3/8" galvanized iron pipe. With the help of a drill and a file I made a slit roughly in the middle. The plastic hose, coming from the aquarium air pump, was attached with some connectors and brass fittings. You will have to play around a bit depending on what you find.
Step 4: Preparing the Burner
In order to make the burner work, you will have to drill 3 holes; 2 to push the venturi pipe through, and 1 to ignite the hardwood pellets and provide oxygen for the embers. I used a 9/16" drill which is about the right size for the 3/8" pipe to fit through snug.
Step 5: Assembling the Cold Smoke Generator
I had 3 shelf brackets at hand to use as feet which works great but I am sure there are plenty other ways to stabilize the smoke generator. Just make sure you don't set your house or garage on fire!
In the pictures you see a prototype where I used a drain strainer as bottom for the burner. I found out that this didn't work so well so I made the version with the 3 holes in the burner. This latest version works at least 2 hours without maintenance which is sufficient.
Step 6: Trial Run
Watch a short video of the smoker in action: