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The Busch International Regenerative
Thermal Oxidizer (RTO) destroys
air toxics and Volatile Organic
Compounds (VOCs) discharged in
industrial process exhausts. The
Busch system achieves VOC destruction
through the process of high temperature
thermal oxidation, converting the
VOCs to carbon dioxide and water
vapor, recycling released energy
to reduce operating costs.
Here's
how the system works.
Process gas with VOC contaminants
enters the RTO through an inlet
manifold. A flow control valve
directs this gas into an energy
recovery chamber which preheats
the process stream. The process
gas and contaminants are progressively
heated in the stoneware bed as
they move toward the combustion
chamber.
The VOCs are then oxidized, releasing
energy in the second stoneware
bed, thereby reducing any auxiliary
fuel requirement. The stoneware
bed is heated and the gas is cooled
so that the outlet gas temperature
is only slightly higher than the
inlet temperature. The flow control
valve switches and alternates the
stoneware beds so each is in inlet
and outlet mode. If the process
gas contains enough VOCs, the energy
released from their combustion
allows self-sustained operation.
For example, at 95% thermal energy
recovery, the outlet temperature
may be only 77 (25 ) higher than
the inlet process gas temperature.
PLC-based electronics automatically
control all aspects of the RTO
operation from start-up to shutdown
so that minimal operator interface
is required.
Here's what the system consists
of.
The Busch Regenerative Thermal
Oxidizer System includes system
fan, motor, burner, heat exchange
media, flow control valves, PLC
based system controls, temperature
recorder and exhaust stack. The
system also includes ceramic fiber-lined,
steel outer skin and an access
platform for servicing burner components.
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