Recuperative catalytic oxidizer features

Recuperative catalytic oxidizer is suitable for treating VOCs off gas. The operation cost is lower and safer.

During operation, the process exhaust is forced into the catalytic oxidizer inlet plenum (using a supply fan) and directed normally through the “cold” side of a high-efficiency, counter-flow plate type heat exchanger, sometimes shell-tube type heat changer used.

The VOCs laden air then enters into the combustion chamber (typically at a temperature very close to that required for catalytic oxidation) where it is thoroughly mixed for temperature uniformity. To maintain set point temperature, auxiliary fuel is introduced if necessary. The preheated stream then passes through a fixed bed of industrial grade catalyst where air pollutant destruction takes place.

After passing through the catalyst chamber, the clean (hot) air is routed back through the “hot” side of the heat exchanger where it continuously preheats the incoming process air. Upon exiting the heat exchanger, the clean (cooled) air is routed to the atmosphere through an exhaust chamber and ultimately through the exhaust stack. Heat exchangers in standard catalytic units are typically fabricated of heavy-duty stainless steel. Thermal recovery efficiencies (TRE) range from 50% to 80%. Internal chambers of a catalytic oxidizer are manufactured entirely of heavy gauge stainless steel. Thermal expansion joints are incorporated where necessary. To maintain low external shell temperatures and minimize radiant heat loss, the internal chambers are covered with blanket insulation and then clad, typically with embossed aluminum. Air pollutant destruction efficiencies of 99% can typically be guaranteed.

Ruiding is strategic partner of Clariant, JGC-UOP, BASF, Cormetech and Umicore. With high performance catalyst, Ruiding built most catalytic oxidizer in the Acrylic acid and acrylate and many other industry segments. Ruiding is now one of the biggest catalytic oxidizer supplier in China.