topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

Gigimedrano
04/17/2019 6:33 AM
Hi guys, my hot top has stripper a gear.. ive only had it for a lil over a year now hot top wants 120+ for a new motor and gearbox assembly any idea? Is this normal year and some Months dont seem lik

Ray Kahuna
04/16/2019 8:04 AM
has anyone built an adjustable coffee grind press?

Nitesh
04/01/2019 10:04 PM
Hello, I have been trying to get in contact with manufacturer of HB roaster in China but failed until now. Does anyone have idea who is the manufacturer of HB roaster in China?

allenb
03/30/2019 3:46 AM
Spammer babble from me and others have been removed from Centrifugal Roasters Thread. From here on we will toss them immediately. ThumbsUp

jpworks
03/27/2019 11:15 PM
What’s the preferred way to upload pics from iPhone?

Users Online
Guests Online: 3

Members Online: 1
Gullygossner

Total Members: 5,915
Newest Member: ignabel
In Memory Of Ginny
Donations

Latest Donations
renatoa - 2.00
JitterzZ - 50.00
PRABHATH COFFEE WORKS - 10.00
John Despres (Scene... - 25.00
snwcmpr - 10.00

View Thread

Who is here? 1 guest(s)
 Print Thread
Fluid Bed Chaff Collector
CoffeeInterest
I’m putting the final touches on my 7.5# Fluid-Bed roaster. I did a test run with a basic small Chinese cyclone and it really killed the cfm of my fan (which was also underpowered). The inlet/outlet was only 50mm so i had some pretty crazy adapters in place to get it to connect to the hood. Reduced the cfm too much.

So, i’m upgrading the vent fan to 660cfms and hoping to improve the chaff separation. I’m leaning towards a Thien-baffle style due to the shorter size it would afford me. Would this be worth it? Or is a cyclone the only real way to handle chaff on a 7.5# batch?

TLDR; Would this work for chaff collection on a 7.5# fluid-bed:
magaimg.net/img/78w8.jpg
 
Want to Help?
By donating you can ensure that HR will continue to be open for years to come. Expenses are 100% transparent and can be viewed publicly at all times. You can find more information on donations and why we request them by reading up on the forum topic here. Thank you.

PhilH
Hi

You could just give it a try and see what happens

- My guess is that there will be too much turbulence and it will blow a fair bit of chaff out of the outlet.
If you could insert a rolled sheet metal cone in there and an exit tube up the centre of that you'll get the classic cyclone low pressure point at the bottom where the air reverses direction and the chaff drops to the bottom of the can.

The cyclone / chaff collector will create some backpressure which will require a bit more blower power. Depending on what you are using you may be just on the point of considering a 2nd VC blower.

50mm may be a little small and may create too much backpressure. Best to try it with a 2nd VC and see how it works Im using a conical reducer tapering down from 6" to 2-1/2" (70mm) with an elbow inside the drum on my 5kg roaster. You do need reasonably high velocity for the cyclone to work well in spinning out the very lightweight chaff to the cyclone cone

some pics attached. I hope this is helpful.

regds Phil
Edited by PhilH on 02/13/2019 3:56 PM
Dalla Corte Mini, Compak K10F, 1.2kg FB LPG/PID FB, 5kg FB LPG/PID
 
PhilH
ok - trying again with posting the pics
you should be able to see elbow in the top of the can and the exhaust tube in the middle in the last pic which is looking up into the cyclone cone
PhilH attached the following images:
file-43.jpg file1-28.jpg file2-24.jpg file3-21.jpg file4-15.jpg

Dalla Corte Mini, Compak K10F, 1.2kg FB LPG/PID FB, 5kg FB LPG/PID
 
CoffeeInterest
Thank you for the detailed response! I didn't end up giving this a try, and it FAILED. What a mess!

I'm going to with a galvanized cyclone now. Not going to mess around with this part of the system any more.
 
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Centrifugal Fluid Bed Concept Fluidbed Roaster 12 04/21/2019 4:54 AM
Transparent Fluid Bed Design Building a Coffee Roaster 86 04/19/2019 3:21 AM
fluid bed design questions Fluidbed Roaster 19 03/28/2019 4:57 PM
Heat Gun Driven Fluid Bed Roaster Fluidbed Roaster 26 03/07/2019 2:24 AM
PID'ed Gas-fired fluid bed roaster Fluidbed Roaster 113 02/25/2019 7:45 AM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2019 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX