Who is here? 1 guest(s)
 Print Thread
Gas Fired Drum Roaster - Lets Build It
dmccallum
All sorts of dramas have kept my roaster parked.
I took a few ideas from this build - good to see it on the move again.
 
Lylabrown
Allen: Greetings and Thank You!

Hey thanks Derek: On the bright side - delays can actually help flesh out some aspects of the design that weren't clear, and possibly prevent do-overs. I hope you get back at it soon, Ive been watching your build with great interest!

I decided to go with an all-in-one roasting cart instead of a bench top design. That simplifies quite a few things and complicates others. The roaster will live on an outdoor covered patio next to the BBQ so extra precautions need to be taken to prevent rust and corrosion over time.

Ive constructed a skeleton using angle iron from bed frames which are commonly left at the curb on garbage day this time of the year (college town). On the left half will be the roaster & cooling tray. On the right is a work surface for a laptop etc. with the cyclone at the back. Below that is a cubby for the gas and electric controls. And at the very bottom a space for the propane tank. It'll be sheathed with steel and mounted on casters. The total footprint is 24" square.

Next up will be sheathing and painting.
Lylabrown attached the following images:
img_0970.jpg img_0967.jpg img_0966_1.jpg img_0965.jpg img_0964.jpg
 
allenb
Wow! This is going to be a high end build. Love the vintage Probat gothic shape.

BTW, is that planter in the background formerly a clothes dryer drum?

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
Lylabrown
Hey Allen, it's a stainless drum from an old washing machine. I like how the perforations help prevent plants from becoming root bound by air-pruning them.

The aesthetic of the Probat style gothic arch is pleasing to my eye compared to the standard exhaust line enclosed within a round dome or an exposed pipe above it.

Yeah, it's ending up looking fancier than what was planned. Luckily - most of the expense is the time related, the materials costs are under $300 so far. For me, half the fun is scavenging materials from scrapyards or re-use stores while out and about.

One of the primary goals is to make a "platform" that is easy to modify as needed. The previous two roasters I built were great at first, but became tiresome to deal with their quirks and limitations. Hopefully, this one will be more trouble free in its operation and maintenance.

Russ
 
eschlukebir
my dad has one of those drums that they welded a hinge and a cover on, he uses it as a live well for fish next to his dock on the lake. All kinds of uses.

I'm also glad you revived this thread. I've been working on my pipe burner, but don't like the way its burning. Getting a better look at yours makes me think I've cut the slots to deep and closer than they need to be.
 
SmokNmirz
Russ, your project is beautiful! You are a true craftsman.

Did you decide to enclose the exhaust air tube to keep it warm so the particulate did not condense out more quickly leaving more residue in the tube?
L-1p, HG-1-motorized, Monolith Flat, (ordered) mini500Plus.

If whatever you do does not put a smile on your face then rethink what you are doing.
 
Lylabrown

Quote

SmokNmirz wrote:
Did you decide to enclose the exhaust air tube to keep it warm so the particulate did not condense out more quickly leaving more residue in the tube?
I'm not nearly that clever! I simply liked the aesthetic of a gothic style arch.



After another long hiatus I finally found the time to work on this project again. Ive cobbled a cyclone together out of 5" gas vent tube and bits of aluminum & stainless steel. The Bill Pentz cyclone calculator provided all the dimensional measurements needed.

In order to make it stronger i enclosed the cone within the cylinder and used end caps to keep it all together. Once assembled it's surprisingly rigid given how thin the stainless tube material is. The bottom ring is for attaching a wide-mouth mason jar as others have done.

I gave it a test using the draft inducer exhaust fan with a paint filter bag on the exit port to see if any chaff escaped. The drum was loaded with a pint of pure chaff and rotated manually to get it airborne, and....Success! The cyclone captured even the dust of broken up chaff as none exited the fan. Hat's off to Mr. Pentz!

Russ
Lylabrown attached the following images:
img_1787.jpg img_1788.jpg img_1784.jpg img_1764.jpg
 
Lylabrown
I found a solution to the problem of getting the beans out of the cooling tray without the use of sweepers or sliding openings. The perforated base of the tray is funnel shaped and feeds into a tube that leads to a canister beneath. The cooling fans are mounted axially around the tube. There will be 4 fans which move 27 CFM each.

Heres a video of it in action:

https://vimeo.com...
Edited by Lylabrown on 05/22/2018 4:32 PM
 
Lylabrown
Here are the photos I tried to upload earlier:
Lylabrown attached the following images:
bottomup.jpg topfunnel.jpg radialholes.jpg funneltube.jpg
 
Lylabrown
I constructed a burner flame sight-glass from a 1-3/8" borosilicate round encased in some kind of automotive intake/exhaust three bolt fitting that had a 1-1/2" ID. The glass is adhered using grey RTV silicone rated at 550*f. It survived a burner test where the chamber reached ~800* for 30 minutes.

Due to the the sight-glass being on the same side as the bean & environmental probes I had to do some cable management theatrics to keep the thermocouple wires from obstructing the view of the flame. Three hours were spent fabricating a stainless steel cable organizer fitting with locking bolts to keep the wires in check.

Absurdity at its finest! This stuff is my favorite part.

-Russ
Lylabrown attached the following images:
tccorral.jpg sightglasser.jpg
 
allenb
Hi Russ, this must be your favorite part indeed! This looks like a shot of a high end European drum roaster coming off the assembly line after the polishing stage. I'm extremely jealous! Get this one finished soon so we can see the works.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
Lylabrown
Hey there Allen, thank you so much!

After nearly four years this finally has the finish line in sight. It's turning out way better than expected.

I figured out a simple drain stopper mechanism for the bean cooler. It consists of two pieces on stainless rod scavenged from a dead inkjet printer and a stainless bathroom towel hook base that had the right shape. See the attached photos.
Lylabrown attached the following images:
img_1954.jpg img_1963.jpg
 
Lylabrown
It took a global pandemic to find some free time to finish this thing!

The next step is learning how to use it.

-Russ
Lylabrown attached the following images:
skn.jpg nrr.jpg nfl.jpg fls.jpg
 
Lylabrown
additional photos:
Lylabrown attached the following images:
fcl_2.jpg frr_2.jpg elec.jpg igniter.jpg
 
Lylabrown
And some more:
Lylabrown attached the following images:
shrd.jpg cntrls.jpg mouth.jpg gas.jpg
 
Ringo
Very nice, such beautiful quality work.
All you need in life is ignorance and confidence, and then success is sure. Mark Twain
 
pisanoal
What a beautiful build! I wish I had the patience and skills to pull something like this off. Nice work!
 
JackH

Quote

pisanoal wrote:

What a beautiful build! I wish I had the patience and skills to pull something like this off. Nice work!


My thoughts exactly!
---Jack

KKTO Roaster.
 
allenb
Beautiful coffee art in metal!
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
goat4hooves
That is a great looking roaster. Excited to see how it roasts! Thanks for sharing your efforts with us.
 
directtraderoasting
This build is gorgeous. I thought my 2kg looked pretty good until I saw this

Edit: what motor is that you're using for the drum?
Edited by directtraderoasting on 07/08/2020 9:43 PM
 
oldgrumpus
Just reading this thread for the first time. Wish I'd seen it sooner. Lots of good info here! And VERY NICE WORKMANSHIP INDEED!!!
Clever Coffee Dripper
Grinder: Macap M4
Roaster: Completed drum roaster project photos shown here:
Photos https://goo.gl/ph...Da6K4wfqw5
Videos https://www.youtu...Bd1NrdpSUH
 
allenb
I just revisited Lylabrown's build as well and yes, this is also an amazing work of art as well as yours! It's too bad that its so easy to overlook or forget about the incredible roaster builds (and other gear) that our members create out of scrap metal, old and new electronics, repurposed this or that and end up looking like it just came off the factory floor with a polish job on it!

I think we have a unique group of tinkerers/engineers/electronics experts that unite around creating coffee processing equipment that rivals what's commercially available.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
IsaacC
Wow, fantastic! Lots to inspire with my current build!
 
Jump to Forum: