[Gasification] pH of wastewater obtained from ricehusk based gasifier

[Kusum Lata]

Dear all,
I found that the pH of the wastewater obtained from the cleaning and 
cooling system of ricehusk based gasifier is always acidic (3-5) while it 
is always in high basic range (8-10) for wood or woodchips based gasifier 
systems.

Could anyone help me out in understanding the possible reason behind it.

Regards,

Kusum Lata



"Viswanathan KS" <viswanathanks at gmail.com> 
Sent by: gasification-bounces at listserv.repp.org
04/07/2006 02:05 PM

To
"Ken Boak" <kenboak at stirlingservice.freeserve.co.uk>
cc
David Fulford <d.j.fulford at reading.ac.uk>, John Archibald 
<leadminer at qwest.net>, GASIFICATION at listserv.repp.org
Subject
Re: [Gasification] Hot charcoal for exhaust cleaning






Heating the vegetable oil to about 160 deg F will reduce the viscosity
of the oil and may reduce hydrocarbons in the exhaust. Engine exhaust
gases could be used for preheating the oil with a suitable heat
exchanger. Golden Fuel Systems, USA  who sell kits for converting
diesel powered cars to use used cooking oil, provides such a preheater
in their conversion kit.

K.S. Viswanathan

On 7/3/06, Ken Boak <kenboak at stirlingservice.freeserve.co.uk> wrote:
> List,
>
> I have now made some measurements on the exhaust gas temperature. 
Ambient
> today is 30.8 C
>
> Engine rpm        Temp C   F
>
> 600                   325 / 617
> 615                   313 / 595
> 638                   295 / 563
>
>
> The engine is using 1.2kg of vegetable oil fuel (cv 9.4kWh/litre) per 
hour
> and consuming 36 kilogrammes of air per hour.
>
> My estimations are that it will produce in 1 hour of running
>
> 2.88 kg O2
> 3.78 kg  CO2
> 1.56 kg  H2O
> 27.66 kg N2
>
> I estimate that I am running with  52% excess oxygen.
>
> The top 3 products could all be utilised in a charcoal gasifier, and the 
hot
> nitrogen contains a significant number of btus for feedstock drying or
> pre-charring.
>
> Any ideas
>
>
>
> Ken
>
>
>
>
>
> ----- Original Message -----
> From: "David Fulford" <d.j.fulford at reading.ac.uk>
> To: "Ken Boak" <kenboak at stirlingservice.freeserve.co.uk>;
> <GASIFICATION at LISTSERV.REPP.ORG>
> Sent: Monday, July 03, 2006 1:37 PM
> Subject: Re: [Gasification] Hot charcoal for exhaust cleaning
>
>
> > Ken
> >
> > I would think this would a very good idea.
> >
> > Are you heating your filtered waste vegetable oil before feeding it 
into
> > the engine?
> >
> > What are going to do with the heat? There seems to be plenty from the
> > engine itself.
> >
> > David Fulford
> >
> > At 22:55 01/07/2006 +0100, Ken Boak wrote:
> > >Gents,
> > >
> > >I am running a 1950 Lister CS 6hp stationary diesel engine on 
filtered
> > >waste vegetable oil and need some advice about the possibility of 
using a
> > >hot charcoal bed for cleaning up the exhaust gases.
> > >
> > >Will hot charcoal reduce the unburnt hydrocarbon compounds?
> > >
> > >If sufficient air was entrained with the exhaust gas flow with a 
simple
> > >mixer, could the exhaust fumes be further consumed by reduction and
> > >combustion within the hot charcoal, and provide useful heat output.
> > >
> > >Any insight into the use of charcoal in this manner would be 
appreciated.
> > >
> > >It is likely that I will have a supply of carbonised woodchip 
charcoal as
> > >a result of running a woodchip gasifier.
> > >
> > >
> > >Thanks in advance,
> > >
> > >
> > >Ken Boak
> > >
> > >
> > >London
> > >_______________________________________________
> > >Gasification mailing list
> > >Gasification at listserv.repp.org
> > 
>http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
> > >http://www.repp.org/discussiongroups/resources/gasification
> >
> > *** Dr David Fulford, Energy Group, Engineering Building       ***
> > ***     School of Construction Management and Engineering      ***
> > ***      The University of Reading, Whiteknights,              ***
> > ***    Reading RG6 6AY, UK      Tel: +44-(0)118-378 8563,      ***
> > *** Fax: +44-(0)118-931 3327 E-mail: D.J.Fulford at Reading.ac.uk ***
> >
> >
> >
>
>
>
>
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