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Heat exchanger reduces cost of fume incineration.
rem ENGINEERING,
Inc. installed a Recuperator cross flow heat exchanger
to recover heat from a natural gas fired thermal oxidizer
designed to operate at 1400°F. Recovering heat from the
boiler exhaust stack will significantly reduce Cellofoam's
monthly natural gas bill.
During the process of making expanded polystyrene, harmful
pentane fumes are released and must be oxidized prior to emitting
to the atmosphere. These room temperature fumes are collected
and passed through the thermal oxidizer. Adjacent to the thermal
oxidizer is a 200 HP, two pass, fire tube boiler, equipped
with primary and by-pass stacks, which uses the hot combustion
gases from the oxidizer to generate process steam.
Cellofoam has a small steam demand and therefore, the by-pass
stack is, on average, approximately 65% open all the time.
The cold (approximately 70°F) pentane fumes to be incinerated
are routed through the heat exchanger installed in the by-pass
stack for a pre-heat step, raising the temperature of the
fumes to 526°F. The temperature increase of 456°F
as a result of the heat exchanger saves Cellofoam approximately
25% on their natural gas bill.
Mr. Greg Bontrager, President of Cellofoam has agreed to
serve as a reference for rem ENGINEERING.
Mr. Bontrager can be contacted at (770) 483-4491.
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