As to gasifying coal, what is the sulfur path? Even if an updraft unit were
operated is a close combustion configuration, complete combustion of the tars
and oils would occur in the combustor leaving minimal particulate emission and
if operating a kiln, any particulate would be a problem of contaminating the
surfaces of fired ceramics. So, it is not clear what the emission issues were
that required court orders, as regardless of the basic system, sulfur emissions
would still be a major factor in pollution and human health.?
In a close coupled system, the water could merely go into the combustor
and not be dealt with which is not the case where maximum removal of it from
the gas stream prior to engine or catalyst operation is a necessity.?
Gasifying low rank coals is a problem and one of the largest gasifier
projects in the US, a partnership between KBR, DOE, The Southern Companies as a
demonstration "Clean Coal" technology has run over budget, time and from my
evaluation of the process, is quite complicated with other methods of
accomplishing the same occur to me without the complicated design. If one
wishes to operate on lignitic or other low rank coals, we have a design that
should be considered.?
Sincerely,
Leland T. "Tom" Taylor
Thermogenics Inc.?
-----Original Message-----
From: DariusTamizi <[email protected]>
To: Discussion of biomass pyrolysis and gasification
<[email protected]>
Sent: Wed, Jun 17, 2015 2:48 am
Subject: Re: [Gasification] Coal Gasification
Dear Rajiv Gupta,
I am one of your gasifier user. According to my experience, when I
load the Charcoal bed too high (obove the Nozle) or when I forget to rotate
the combrotor to remove the charcoal, the charcoal will ignited infront the
nozles and the nozles are burned (disappeared) in 5-10 minute.
I wonder if? the Nozle can stay for how long when you burn coal?
Regards,
Darius
?On 5/26/2015 9:27 PM, Rajiv Gupta wrote: To the list courtesy
of Ankur Scientific: Dear Mr. Tom, Please find attached our Coal Gasifier
brochure for your reference. Best Regards, Rajiv Gupta -----Original
Message----- From: BC Jain [mailto:[email protected]] Sent: 26 May,
2015 12:04 PM To: 'Tom Miles' Thanks, Tom. I do not know if you are aware of
the coal gasifier series launched by us - extremely clean gasification at a few
hundred kilograms to a few tons per hour processing rates. A number of these
plants have been set up recently in a town in Gujarat, famous for ceramic
industry. Earlier, updraft gasifiers were used and the pollution led to banning
of these by the highest court in Gujarat. Our technology was a response to
solve this issue and allows industry to use a low cost fuel in a totally
environment -friendly manner - no condensate, no process water and no air
pollution. Kiln temperatures of upto 1160 deg C have been consistently met.
Plants installed have little maintenance and very high reliability as a
continuous process industry is involved. We are also offering these gasifiers
in power mode for power outputs of upto 5 MW or so. Coal used is typically
Indonesian, low ash which is very regularly used in India. I shall ask a
colleague of mine to send relevant details to you. Best wishes, BC JAIN
Rajiv to talk to me. -----Original Message----- From: Tom Miles
[mailto:[email protected]] Sent: Tuesday, May 26, 2015 10:58 AM To: 'BC Jain'
Subject: RE: SPAM: Re: [Gasification] Gasification Digest, Vol 57, Issue 9 BC,
Good to see you that you are monitoring the coal gasifier discussion. You are
still a member of the list so you can post directly to the discussion. Send
to: [email protected]> Kind regards, Tom Today's
Topics: 1. Difference between biomass and coal gasification (Saiteja
Chinta) 2. Re: Difference between biomass and coal gasification (Thomas
Koch) 3. Re: Difference between biomass and coal gasification (Mano Va)
4. Re: Difference between biomass and coal gasification (Arnt Karlsen)
5. Re: Difference between biomass and coal gasification (Juan Moreno)
----------------------------------------------------------------------
Message: 1 Date: Mon, 25 May 2015 11:34:08 +0530 From: Saiteja Chinta
<[email protected]> To: [email protected]
Subject: [Gasification] Difference between biomass and coal gasification
Message-ID:
<CAH6fn7A8LGFaTVeYZQjBjcJKctX6jRsPA8=vug5wngenytb...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8" 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. 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. So in this sense, tar generated
after gas cooling be recycled into gasifier? Regards, Saiteja --------------
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------------------------------ Message: 2 Date: Mon, 25 May 2015 06:30:06
+0000 From: Thomas Koch <[email protected]> To: Discussion of biomass pyrolysis
and gasification <[email protected]> Subject:
Re: [Gasification] Difference between biomass and coal gasification
Message-ID:
<[email protected]>
Content-Type: text/plain; charset="utf-8" Hi Saiteja In an updraft fixed bed
gasifier there is no clear link between maximal temperature and tar content in
the gas. Slagging takes place in the oxidizing zone in the bottom of the
reaction zone, tar is made in pyrolysis zone in the top of the bed. If you
observe slagging you can inject water together with the air ? eg if you use a
water scrubber as part of you gas cleaning you have a fraction to get rid of.
That is one way to reduce the temperature. There Is a lot of reports from the
development of the V?lund updraft gasifier in Harbo?re that vould be very
relevant for you to read.
http://www.res-chains.eu/wp-content/uploads/2013/04/Case-Study-Gasification-
Harbo%C3%B8re.pdf Thomas Fra: Gasification
[mailto:[email protected]] P? vegne af Saiteja
Chinta Sendt: 25. maj 2015 08:04 Til: [email protected]
Emne: [Gasification] Difference between biomass and coal gasification 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. 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. So in this sense, tar
generated after gas cooling be recycled into gasifier? Regards, Saiteja
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------------------------------ Message: 3 Date: Mon, 25 May 2015 13:18:38
+0530 From: Mano Va <[email protected]> To: Discussion of biomass
pyrolysis and gasification <[email protected]>
Subject: Re: [Gasification] Difference between biomass and coal gasification
Message-ID:
<cakvvu5gzpjcd-epkagvxugnibvg9e6lwjcwcw2vjcpxw7j+...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8" HI Saiteja Chinta I want to sare
some points with u I am interested in coal gasification where coal used is
with high ash content and less reactive ** High Ash content Leads to more
Clinker formation * ** Its Difficult to continues operation* Capacity of
gasifier is around 30 Tons of coal per day and technology is updraft fixed bed
**1.25 ton /hr Updraft Leads to more tar formation* 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. **If u maintained high
temperature also in updraft moisture content and pyrolysis zone Tar wapers are
mixed with gas* So in this sense, tar generated after gas cooling be recycled
into gasifier? *May be Make some pellet form can reuse that tar mix with coal
powder * On Mon, May 25, 2015 at 11:34 AM, Saiteja Chinta
<[email protected]> wrote: 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. 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. So in this sense, tar
generated after gas cooling be recycled into gasifier? Regards, Saiteja
_______________________________________________ Gasification mailing list to
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------------------------------ Message: 4 Date: Mon, 25 May 2015 11:10:22
+0200 From: Arnt Karlsen <[email protected]> To:
[email protected] Subject: Re: [Gasification] Difference
between biomass and coal gasification Message-ID:
<[email protected]> Content-Type: text/plain;
charset=US-ASCII On Mon, 25 May 2015 11:34:08 +0530, Saiteja wrote in message
<CAH6fn7A8LGFaTVeYZQjBjcJKctX6jRsPA8=vug5wngenytb...@mail.gmail.com>:
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 gasifier? ..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.
Regards, Saiteja -- ..med vennlig hilsen = with
Kind Regards from Arnt Karlsen ...with a number of polar bear hunters in his
ancestry... Scenarios always come in sets of three: best case, worst case,
and just in case. ------------------------------ Message: 5 Date: Mon, 25
May 2015 08:37:05 -0300 From: Juan Moreno <[email protected]> To:
Discussion of biomass pyrolysis and gasification
<[email protected]> Subject: Re: [Gasification]
Difference between biomass and coal gasification Message-ID:
<[email protected]> Content-Type: text/plain;
charset="windows-1252"; Format="flowed" 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 type. 4. Do you know which is the melting point of your
ashes? Juan Moreno El 25-05-2015 a las 6:10, Arnt Karlsen escribi?:
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
gasifier? ..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.
Regards, Saiteja
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