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A newbie Designing his first roaster
JavaJoshua-BoquistBean
I have an urge to build my own coffee roaster, and I think a Sivetz roaster would be a really fun way to roast coffee. I have seen all sorts of different modifications on roasters and that allows me to tap into my creative abilities. However, I know very little about electrical circuitry and next to nothing about engineering. Still, I have been thinking through (simple) designs that I can conceive being built simply enough. It involves an electric leaf blower and a propane torch. I am thinking about connecting the fan and the heat source by some sort of 'T' configuration, where the fan is below and the heat is to the side. I figure the piping will resemble this 'T' shape as well.

I need help with understanding the logistics involved though. I have heard people talk about a certain horsepower needed for fluidizing the bean bed depending on how many grams of beans you roast at a time, but I'm not sure how I can figure that out. Same for the Wattage; I'm not certain what this means. Also, there's the thermocouple and I'm not sure what that is either. In laymen terms, what does all this mean?

I bought a Pyrex bake a round for my roasting shaft, but I have no other parts yet. Where do I go from here? And could a leaf blower work as a good fan?
Edited by JavaJoshua-BoquistBean on 01/28/2019 1:06 PM
 
greencardigan
There have been roasters built here that used leaf blowers. But a leaf blower will likely be very hard to use. Too much airflow and maybe not enough pressure. I would consider a small vacuum blower over a leaf blower any day.
 
JavaJoshua-BoquistBean
What do you mean by too much air flow and not enough air pressure? And do you mean something like a shop vacuum?
 
JavaJoshua-BoquistBean
Sorry, I know this is a bit sporadic. I just realized there is piping that needs to connect from the fan, to the heating element, and ultimately the bean shaft. Will these pieces need to be custom built, or can I find fitting for a Pyrex bake a round in most department stores?
 
greencardigan
JavaJoshua-BoquistBean wrote:

What do you mean by too much air flow and not enough air pressure? And do you mean something like a shop vacuum?

Leaf blowers are not usually designed for pressure or overcoming resistance. They are typically for high airflow. You may not be able to circulate a very deep bean column. Or if it does circulate, you may have trouble keeping the beans from blowing out or providing enough power to heat the large air flow.
 
JitterzZ
JavaJoshua-BoquistBean wrote:

Sorry, I know this is a bit sporadic. I just realized there is piping that needs to connect from the fan, to the heating element, and ultimately the bean shaft. Will these pieces need to be custom built, or can I find fitting for a Pyrex bake a round in most department stores?

Howdy and Welcome. I'm just beginning my coffee roasting adventure and so I can't be of much help. However, I have been reading through this forum for several months just trying to get some direction, and I believe that my first build will be similar to this one ( https://forum.hom...post_40357 ), as I already have the 600W minivac motor. I thought you might be interested in the builders ingenuity and the simplicity of it. Here's a Pyrex bake-a-round build from allenb that I would also like to build https://forum.hom...post_41881 This forum is full of great builds and knowledgeable people. Enjoy.
Welcome
Edited by JitterzZ on 01/29/2019 7:32 PM
 
JavaJoshua-BoquistBean
Thanks for the help! I'll probably scrounge some things together based on the ideas I see here and go from there. Thanks for the help!
 
specialreserve
I am currently doing a build and I will include a parts list if you wanna follow it. Its a fluid bed design and kinda what you are wanting to do. I have done some preliminary testing on lofting beans etc and as per the others the vacuum motor is a good place to start for good reason due to design. I am using this one https://www.amazon.com/gp/product/B0016ZO5UE/ref=oh_aui_search_asin_title?ie=UTF8&psc=1. It puts out quite a lot of wind to be sure. and there are plenty like it for you choose from.
"friends dont let friends drink bad coffee"
 
JavaJoshua-BoquistBean
specialreserve wrote:

I am currently doing a build and I will include a parts list if you wanna follow it. Its a fluid bed design and kinda what you are wanting to do. I have done some preliminary testing on lofting beans etc and as per the others the vacuum motor is a good place to start for good reason due to design. I am using this one https://www.amazon.com/gp/product/B0016ZO5UE/ref=oh_aui_search_asin_title?ie=UTF8&psc=1. It puts out quite a lot of wind to be sure. and there are plenty like it for you choose from.

I would very much like to see your build and it’s progress! Thanks for the fan suggestion. Do you know how comparable it might be to a vacuum in a high end vacuum cleaner? I would like to find the expensive parts at goodwill or a restore, partly because I’m a cheapskate but also because you can find very great electronics to upscale, so I presume anyways.
 
JitterzZ
JavaJoshua-BoquistBean wrote:

specialreserve wrote:

I am currently doing a build and I will include a parts list if you wanna follow it. Its a fluid bed design and kinda what you are wanting to do. I have done some preliminary testing on lofting beans etc and as per the others the vacuum motor is a good place to start for good reason due to design. I am using this one https://www.amazon.com/gp/product/B0016ZO5UE/ref=oh_aui_search_asin_title?ie=UTF8&psc=1. It puts out quite a lot of wind to be sure. and there are plenty like it for you choose from.

I would very much like to see your build and it’s progress! Thanks for the fan suggestion. Do you know how comparable it might be to a vacuum in a high end vacuum cleaner? I would like to find the expensive parts at goodwill or a restore, partly because I’m a cheapskate but also because you can find very great electronics to upscale, so I presume anyways.


Check his link ( https://www.amazo...&psc=1 ). It's a Vacuum Blower NOT a FAN. It's used in "commercial canister or utility vacuums".
Edited by JitterzZ on 01/30/2019 6:13 PM
 
JavaJoshua-BoquistBean
After taking apart an old gas grill, it looks like the electronic igniter needs fixed. Also, it has two burners that are jointly attached. which would be difficult to reconfigure I think. . Any suggestions on cheap circular propane burners with adequate control? At this point, I want the easiest way out, so even a hot air gun might work. Any suggestions?
 
JitterzZ
JavaJoshua-BoquistBean wrote:

After taking apart an old gas grill, it looks like the electronic igniter needs fixed. Also, it has two burners that are jointly attached. which would be difficult to reconfigure I think. . Any suggestions on cheap circular propane burners with adequate control? At this point, I want the easiest way out, so even a hot air gun might work. Any suggestions?


"camp stove mushroom burner (8K btus)":https://youtu.be/...
Give this thread a read-through:https://forum.hom...rowstart=0
Edited by JitterzZ on 02/03/2019 11:03 AM
 
JavaJoshua-BoquistBean
JitterzZ wrote:

JavaJoshua-BoquistBean wrote:

After taking apart an old gas grill, it looks like the electronic igniter needs fixed. Also, it has two burners that are jointly attached. which would be difficult to reconfigure I think. . Any suggestions on cheap circular propane burners with adequate control? At this point, I want the easiest way out, so even a hot air gun might work. Any suggestions?


"camp stove mushroom burner (8K btus)":https://youtu.be/...
Give this thread a read-through:https://forum.hom...rowstart=0

You're super helpful!
 
JitterzZ
woohoo
 
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