[Gasification] Coal Gasification

Wed Jun 17 03:45:10 CDT 2015

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:bcjain at ankurscientific.com]
> 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:tmiles at trmiles.com]
> 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:gasification at lists.bioenergylists.org>
>
> 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<chinta.saiteja at gmail.com>
> To:gasification at lists.bioenergylists.org
> Subject: [Gasification] Difference between biomass and coal
> 	gasification
> Message-ID:
> 	<CAH6fn7A8LGFaTVeYZQjBjcJKctX6jRsPA8=vUg5wNGEnytBjqA at 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<tk at tke.dk>
> To: Discussion of biomass pyrolysis and gasification
> 	<gasification at lists.bioenergylists.org>
> Subject: Re: [Gasification] Difference between biomass and coal
> 	gasification
> Message-ID:
> 	<4F20766DE525FF408A7C148DBBD0A91D14489957 at SRV-MAIN.tkenergi.local>
> 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:gasification-bounces at lists.bioenergylists.org] P?
> vegne af Saiteja Chinta
> Sendt: 25. maj 2015 08:04
> Til:gasification at lists.bioenergylists.org
> 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
> -------------- next part --------------
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> ------------------------------
>
> Message: 3
> Date: Mon, 25 May 2015 13:18:38 +0530
> From: Mano Va<gmmanovassm at gmail.com>
> To: Discussion of biomass pyrolysis and gasification
> 	<gasification at lists.bioenergylists.org>
> Subject: Re: [Gasification] Difference between biomass and coal
> 	gasification
> Message-ID:
> 	<CAKVVU5GZpJcD-EPkAGvXUGnibvG9E6LWjcwcW2vJcPxW7j+-CA at 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<chinta.saiteja at gmail.com>
> 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 Send a Message to the list, use the email address
>> Gasification at bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>>
>> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bi
>> oenergylists.org
>>
>> for more Gasifiers,  News and Information see our web site:
>> http://gasifiers.bioenergylists.org/
>>
>>
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> ------------------------------
>
> Message: 4
> Date: Mon, 25 May 2015 11:10:22 +0200
> From: Arnt Karlsen<arnt at iaksess.no>
> To:gasification at lists.bioenergylists.org
> Subject: Re: [Gasification] Difference between biomass and coal
> 	gasification
> Message-ID:<20150525111022.0f7b80bc at nb6.lan>
> Content-Type: text/plain; charset=US-ASCII
>
> On Mon, 25 May 2015 11:34:08 +0530, Saiteja wrote in message
> <CAH6fn7A8LGFaTVeYZQjBjcJKctX6jRsPA8=vUg5wNGEnytBjqA at 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<juan.moreno at umag.cl>
> To: Discussion of biomass pyrolysis and gasification
> 	<gasification at lists.bioenergylists.org>
> Subject: Re: [Gasification] Difference between biomass and coal
> 	gasification
> Message-ID:<55630961.3090808 at umag.cl>
> 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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>
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> ------------------------------
>
> End of Gasification Digest, Vol 57, Issue 9
> *******************************************
>
>
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