[Gasification] Hazardous classification of MSW, plasma gasification thermodynamics

[Sunil K Rawal]

I have hands on experience ( EPC and operation) on Plasma gasifiaction of
Industrial hazardous waste plant of capacity 3000Kg/ hour feed. I can
provide you solution for all your problems in this regards. Please contact
me if you are interested.

 SUNIL K RAWAL
Achintya Projects & Services,
1st Floor, 60 Evershine Mall,
Near Mindspace, Chincholi Bunder,
Malad (west), MUMBAI 400064 INDIA
Cell# 0091-9967064472
Tel;- 0091 (022)-42640020
Fax;- 0091(022)-42640021
Email; sunilkrawal at gmail.com

On Sun, Feb 12, 2012 at 9:15 PM, <linvent at aol.com> wrote:

> GAsification produces an ash where the RCRA hazardous metals are bound and
> inert,  and pass US EPA TCLP leachate test which means that it can be put
> into landfill. I am not sure how MSW can be classed as a hazardous waste as
> per your language Peter. Otherwise normal landfills would also accept
> hazardous waste. Metals volatilized in a normal gasifier are condensed in
> the lower temperature section of the gas processing. In plasma gasification
> they would coat any nearby cooler surface very rapidly, leading to
> potential blockage in short order. The amount of energy put into plasma
> gasification is a waste of energy as all of the desired reactions occur at
> much lower temperature and it makes no thermodynamic reason to go above
> those temperatures. Ash vitrification in plasma is supposedly better, but
> the lower temperature and hydrogen environment of a regular gasifier
> produce a stable TCLP ash anyhow.
> There are direct methods of measuring metals in a gas stream. There is an
> interesting study where the metal balance in a gasifier is attempted to be
> determined but couldn't. More went in  than came out and where the
> difference occurred was never determined.
> Sincerely,
> Leland T. "Tom" Taylor
> President
> Thermogenics Inc.
>
> -----Original Message-----
> From: jonathan <jonathan at bmpconsultants.com>
> To: Discussion of biomass pyrolysis and gasification <gasification at lists.*
> *bioenergylists.org <gasification at lists.bioenergylists.org>>
> Sent: Sat, Feb 11, 2012 7:39 pm
> Subject: Re: [Gasification] Steam Turbines
>
> We can provide custom turbines; if you will forward your requirements I'll
> provide you with a quote.
>
> Thanks,
>
>
> Jonathan
>
> On Sat, Feb 11, 2012 at 3:58 PM, Peter & Kerry &
> lt;realpowersystems at gmail.com**> wrote:
> Hi Liran,
>
> The 2 second combustion requirement is an Interesting and slightly
> disturbing prescriptive regulator response (that narrows gas use options),
> is somebody in authority just guessing and being cautious or is it based
> around actual gas analysis results from your plasma gasification system?
>
> What potential constituents in the gas stream are these requirements aimed
> at?
>
> In regard our own experience with gasifying hazardous waste (sewerage
> sludge with potential heavy metal contaminants, particularly mercury &
> cadmium) the client at the time for this (a large public authority) would
> not pay for direct emissions testing covering these so we paid out of our
> own pockets for an indirect "indicator" measurement, getting a ultimate
> analysis of the raw feed stock and the same test on the ash collected from
> the test run, then had a industrial chemist review the results. This showed
> the metals identified in the original analysis were captured within the ash
> in equivalent amounts relative to the mass reduction from the original
> sample (so didn't travel out with the gas).
>
> Is this a problem with Plasma gasification? Are such contaminants
> mobilised in the gas instead?
>
> We are currently engaged in the early stages of a formal testing project
> involving MSW and other hazardous wastes that will have EPA oversight and
> permitting for the trial. The results from this will inform pilot
> commercial scale system design and operating parameters in regard to
> emission management for our own system, so we are interested in what other
> regulator agencies are thinking in regard general gasification issues that
> might be flagged along the way.
>
> Otherwise we would agree with Pannierselvam's question. Certainly subject
> to your gas meeting all the requirements for gas turbines (not just energy
> content) then these combined with downstream HRSG steam units using this
> exhaust, perhaps augmented with some  auxiliary firing if needed, could be
> another way to meet your regulatory requirement.
>
> At the moment we are unaware of any commercial fuel cells that wouldn't
> require a high level of gas polishing and separation without quickly
> poisoning the cell, but also would love to hear more.
>
> Regards,
> Peter
>
> Peter Davies
> Real Power Systems Pty Ltd
> Australia
>
>
> Steam Turbines
>
> Liran Dor liran at eer-pgm.com
> Sat Feb 11 13:26:27 CST 2012
> Previous message: [Gasification] Steam Turbines
> Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
> Dear Pannierselvam,
>
> Thank you for your reply
>
> The reason for the rankin cycle is that due to the fact we are treating
> hazardous waste the environmental regulation dictate we combust the gas in
> a chamber with a 2 second residence time.
>
> I do like your approach for the MSW application we are working on and
> would like to hear more about it.
>
> Thanks
>
> Liran
>
>
> ______________________________**_________________
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.**org <Gasification at bioenergylists.org>
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.**org/mailman/listinfo/**gasification_lists.**
> bioenergylists.org<http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org>
>
> for more Gasifiers,  News and Information see our web site:
> http://gasifiers.**bioenergylists.org/___________**
> ______________________________**______<http://gasifiers.bioenergylists.org/_______________________________________________>
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.**org <Gasification at bioenergylists.org>
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.**org/mailman/listinfo/**gasification_lists.**
> bioenergylists.org<http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org>
>
> for more Gasifiers,  News and Information see our web site:
> http://gasifiers.**bioenergylists.org/<http://gasifiers.bioenergylists.org/>
>
>
>
>
> ______________________________**_________________
> Gasification mailing list
>
> to Send a Message to the list, use the email address
> Gasification at bioenergylists.**org <Gasification at bioenergylists.org>
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.**org/mailman/listinfo/**gasification_lists.**
> bioenergylists.org<http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org>
>
> for more Gasifiers,  News and Information see our web site:
> http://gasifiers.**bioenergylists.org/<http://gasifiers.bioenergylists.org/>
>



--
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists.org/attachments/20120213/c8bd2cdf/attachment.html>