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Re: Reducing Chloride Corrosion in Municipal Solid Waste Fueled Boilers



Ihab:
I suggest you check into the Nickel Development
Institute (www.nidi.org).  This issue has beem
addressed recently, and I believe that their
researchers might also be able to help.  NiDI's
interest, of course, is promoting the use of
nickel, in this case in the form of high-nickel
alloys that are extremely corrosion resistant.

----- Original Message -----
From: Ihab H Farag <ihab.farag@unh.edu>
To: <p2tech@great-lakes.net>
Sent: Sunday, March 12, 2000 7:55 AM
Subject: Reducing Chloride Corrosion in Municipal
Solid Waste Fueled Boilers


> March 11, 2000
>
> Hello
>
> Municipal solid waste (or trash) is often burned
in a
> boiler to generate power. Compared to
traditional fuel
> burning (like coal, or oil) the municipal solid
waste has
> a high content of plastics and other materials.
These
> material contain chlorides. At high temperature
burning,
> these chlorides are released in the hot gases.
When the
> hot gases come into contact with the boiler
tubes, the
> chlorides in the vapor cause corrosion of tubes,
and as
> result, damaging the tubes.
>
> The approach taken by the industry has been to
replace
> tube metals when corrosion starts. This creates
a
> pollution problem and is an expensive approach.
>
> P2 basics suggest elimination of chloride
substances from
> the burned municipal waste. This is not a
possible
> solution. Actually, as more paper gets recycled,
the
> plastic content of the municipal waste will
increase.
>
> The question is: Are there suggested approaches
to
> prevent the corrosion of these heated tubes? Is
it
> possible to inject some chemicals into the
boiler, or add
> chemical(s) to the municipal waste that will
capture the
> chlorides and reduce the corrosion.
>
> I welcome any comments or ideas. Thanks.
>
> Ihab Farag
>
> Ihab H. Farag, Sc.D., P.E.         * E-Mail:
ihab.farag@unh.edu  or
> Robert C. Davison Professor        *
ihf@christa.unh.edu
> Chemical Engineering Department    * Phone Off:
(603) 862-2313
> University of New Hampshire        *      home:
(603) 868-5603
> 33 College Rd (255 Kingsbury Hall) *      Fax :
(603) 862-3747
> Durham, NH  03824-3591, USA        *
> homepage:
>     http://pubpages.unh.edu/~ihf
>
> N.H. Pollution Prevention Partnership homepage:
>     http://pubpages.unh.edu/~ihf/pp2.html
>
>