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RE: in-process quench oil recycling

The following information is provided by our Senior Manufacturing Engineer:

We centrifuge our quench oil, the self contained units are very easy to
install and very efficient to operate. They are automatic and do not need
constant attending. The life of the oil is increased to almost infinity
which usually pays for the centrifuge system in 1 or 2 years.  If you have
heat exchangers you save on cleaning them, because the oil is so clean there
is no fallout. They clean large volumes per hour, ours is rated at 5000 gal
per hour, we have four 10,000 gal quench tanks. Filter units are much slower
like 50 gal per hour. There are also smaller centrifuges to fit almost any
application. The cost of our unit was about $80,000, and we have had it
about 15 years. Have never had the slightest regret it is fantastic.

Tim Tuttle
Environmental Coordinator
Scranton Army Ammunition Plant
156 Cedar Avenue
Scranton, PA 18505

-----Original Message-----
From: Andy Bray <abray@newmoa.org>
To: P2tech@Great-Lakes.Net <p2tech@great-lakes.net>
Date: Wednesday, May 17, 2000 9:32 PM
Subject: in-process quench oil recycling

>There are technologies available for removing contaminants from quench oils
>in process, thereby extending the life of the quenchant.  Some of these
>technologies are simple strainers, magnetic filters and traps.  More
>sophisticated systems contain filter media or centrifuges to remove
>What are the challenges to implementing these various technologies?
>How long might the useful life of the quenchant be extended?  I know this
>going to be application specific and will very depending on the type of
>treating being performed prior to the quenching, but I am only looking for
>What are the range of purchase costs for the more sophisticated units?
>Thank you for any assistance you can provide.
>Andy Bray
>Northeast Waste Management Officials' Association (NEWMOA)
>129 Portland Street, Sixth Floor
>Boston, MA 02114
>617-367-8558 ext. 306