[Gasification] Straw Fueled CHP

[Greg Manning]

Hi Doug, thank you for the information, and yes I remember the "Eco-Puck"
... I was hoping to not go this route, however times have changed, and wood
gathering is somewhat harder on the back, than it was even a year ago, was
simply looking to other options, that even though more costly on the ROI
side, would be easier on the body.

I think you (and tom) have snapped me back into reality. we will have to
see.

thanks for the great information.
Greg

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On Tue, Dec 26, 2017 at 3:18 PM, Doug <doug.williams.nz at gmail.com> wrote:

> Hi Greg,
>
> Tom has covered the issues of straw gasification, and certainly liquefied
> ash, and sintered clinker are an issue not easily overcome if you just want
> to make gas. The issue always remains in that raw straw can end up passing
> through, to then add their condensible volatiles to the end gas.
>
> You may remember that we cubed flax, straw, and hemp for trials in
> Winnipeg using a rather big vertical rotary machine. It was at least a
> solution to being able to get the volumes reduced, but for sure
> conventional gasifiers of most designs just do not incorporate the
> appropriate factors to control the low velocity air and fast moving fuel.
> If you hold the fuel it will slag, so to me, the first thing I would do is:
>
> 1. Establish first how thick the bed can be with your cubed fuel on a
> horizontal high porosity grate plate (or other).
>
> 2. With various flows, I would want to see if I could function with the
> thinnest bed possible, allowing for the lowest air velocity, and minimal
> ash problems.
>
> 3. If you do this in the open air, watch the smoke generation and time the
> colour changes, you know it explains the state of pyrolysis.
>
> Downside.
>
> 1. Cubing is high energy consumption adding to fuel cost, unless you can
> generate power from the gas you make.
>
> 2. The output char, if that is the target, will need very careful airtight
> storage, plus a way to move it about in considerable volume. Very hazardous
> to health.
>
> 3. You still have to design on a scale that your fuel test information
> will set in "stone".
>
> Hope you keep us informed on your progress as I am sure others will have
> more to contribute (as we do!)
>
> Regards,
>
> Doug Williams.
>
> Fluidyne.
>
>
> On 27/12/17 05:57, Greg Manning wrote:
>
>> Greetings Doug and list,
>>
>> I hope all is as well as can be as we all age like fine wine.
>>
>> In the interest of the original post about straw gasification, I am going
>> to attempt a sample run in my latest unit out of curiosity, I think going
>> the route of cubed wheat straw would be the way to go, what are your
>> thoughts on this ?
>>
>> Greg Manning
>>
>>
>>
>
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