Browse Prior Art Database

Secondary Catalyst Bed in Incinerator Exhaust Stack

IP.com Disclosure Number: IPCOM000113077D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Erb, AJ: AUTHOR

Abstract

A method is described for achieving greater than 99% VOC destructions efficiency in an incinerator in which fumes are by-passing the main catalyst bed due to leaks through the catalyst bed or the primary heat exchanger. A small secondary catalyst bed can be installed in the incinerator exhaust stack to destroy VOCs which bypass the main catalyst bed.

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Secondary Catalyst Bed in Incinerator Exhaust Stack

      A method is described for achieving greater than 99% VOC
destructions efficiency in an incinerator in which fumes are
by-passing the main catalyst bed due to leaks through the catalyst
bed or the primary heat exchanger.  A small secondary catalyst bed
can be installed in the incinerator exhaust stack to destroy VOCs
which bypass the main catalyst bed.

      A catalytic incinerator is required to achieve 99% reduction of
MEK and EGME in an exhaust stream from a manufacturing process.

Leaks either from the inlet process stream heat exchanger to the
exhaust stack or around the catalyst bed made it impossible to
achieve more than 98% efficiency.  The heat exchanger efficiency is
low (42%) so the exhaust temperature out the stack is 500-700 deg.
F.  The invention takes advantage of the relatively high exhaust
temperature by locating a small catalyst bed in the exhaust stack.
This bed is about 1/4 the size of the main bed.  The small catalyst
bed destroys 60-80% of the MEK in the exhaust and raises the overall
efficiency of the incinerator to 99%.