[Gasification] Difference between biomass and coal gasification
juan.moreno at umag.cl
Mon May 25 06:37:05 CDT 2015
1. You want to adapt a biomass gasifier to coal gasifier?
2. If you have high ash coal, you know the components of these ashes, as
many inorganic can catalyze your reaction and behave in a better way.
3. What is the calorific value of your coal, will be the subbitominosos
4. Do you know which is the melting point of your ashes?
El 25-05-2015 a las 6:10, Arnt Karlsen escribió:
>> Hi all,
>> >Thanks for the response, but I am once again stating my question with
>> >some specifications.
>> >I am interested in coal gasification where coal used is with high ash
>> >content and less reactive.
>> >Capacity of gasifier is around 30 Tons of coal per day and technology
>> >is updraft fixed bed.
> ..can this be modified to fit e.g. a 1 - 2 meter tall "battery
> of Imberts" inside your current reactor vessel? I haven't made
> up my mind on the ideal sizes for my gasifier and I have a few
> ideas I'd like to try out.
> ..regardless of sizes, the hot section of my gasifier is going
> to be about 1 to 2 meters tall, and I'd like to consentrate on
> that rather on the other junk I need to test my ideas.
>> >If the reactor is operated at high temperature to crack any tar, ash
>> >would come out in molten form (Not desired) as conditions will cross
>> >ash melting point.
> ..in my gasifier (75kWe-300kWth "V-hearth Imbert" with tar vapor
> flare on top of the combustion zone "lens") I simply draw my tar
> vapors off my fuel hopper that sits on top of my combustion zone
> "lens", pipe it and some air straight down into my flare and use
> the combustion zone "lens" to ignite and burn my tar vapors, this
> also agitates and stabilizes the Imbert combustion zone "lens."
> ..for updraft, this becomes a little harder, as you have tar vapors
> "all over" your gas, and not just in your fuel hopper.
>> >So in this sense, tar generated after gas cooling be recycled into
> ..your tar vapors generated in your gasifier and then
> condensed into tar droplets when you cool your gas.
> ..with your upstream gasifier, you have to clean your
> entire product gas stream, how much does that cost?
> ..with my setup, I keep my tar vapors away from my product gas,
> instead I use them to heat, agitate and stabilize my "Imbert"
> combustion zone, and then to fuel it, around 2/3 to 4/5 of it.
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