Thermal Recuperative Oxidizer (TO)

Thermal Recuperative Oxidizers (TO's) from The CMM Group destroy air pollutants emitted from process exhaust streams at temperatures ranging from 760°C (1,400 F) to 815°C (1,500 F). TO's utilize a multi-pass shell-and-tube type heat exchanger, which is fabricated of heavy-duty stainless steel. Oxidation is achieved as pollutants pass through the combustion chamber, are mixed and held at elevated temperatures in the combustion chamber.

The basic design concept of thermal oxidation is to promote a chemical reaction of the air pollutant with oxygen at elevated temperatures. This reaction destroys the pollutant in the air stream by converting it to CO2, H2O and heat. The rate of reaction is controlled by the factors of time, temperature and turbulence.

In operation, the process exhaust fumes are forced into the recuperative oxidizer inlet manifold (with a high pressure supply fan) and directed into the "cold" (tube) side of a high efficiency, stainless steel, multi-pass shell-and-tube type heat exchanger. The pollutant laden air passes through the combustion chamber, is thoroughly mixed for temperature uniformity (turbulence) and held at the elevated set-point temperature (temperature) for a residence time of 0.5 to 1.0 seconds (time). VOC/HAP destruction takes place within the combustion chamber where auxiliary fuel is introduced if necessary.

After passing through the combustion chamber, the clean (hot) air is routed back through the "hot" (shell) side of the heat exchanger where it continuously preheats the incoming air. Upon exiting the heat exchanger, the clean (cooled) air is routed through an exhaust chamber and ultimately through the exhaust stack. Heat exchangers for use in standard thermal recuperative units are typically fabricated from heavy duty stainless steel. Thermal efficiencies range from 40% to 80% with expansion joints as required. To maintain low external shell temperatures and minimize radiant heat loss, the unit is internally insulated with long-life ceramic fiber modules. The external shell is made of carbon steel. Air pollutant destruction efficiencies of 99%+ can typically be guaranteed.

Standard Features by CMM (Many custom options available)	Typical Applications (Varies based on specifications)	Typical Advantages & Disadvantages
High air pollutant destruction efficiencies are guaranteed Lowest operating costs available with energy efficient design Designed to meet your specific project requirements Proven high quality components are used throughout Control scheme is designed to automatically react to your manufacturing process Modern PLC based controls with color touch screen interface Data-logger is included for recordkeeping Meets or exceeds all regulations	4,250 to 51,000+ NCMH (2,500 to 30,000+ SCFM) (2,500 to 30,000+ SCFM) Suited for air streams with moderate to high levels of air pollutant Common uses include: Adhesive coating Chemical processing Converting web dryers Heat-set printing Metal decorating Pharmaceutical Textile manufacturing Many others…	Advantages: Moderate capital cost Low operating costs with moderate to high air pollutant concentrations Ease of operation Ease of install Disadvantages: High operating costs with low air pollutant concentrations Shell-and-tube heat exchanger has long life expectancy only with continuous operation

General Information required for APCS Project Development

A brief description of the process emitting air pollutant. Hours of operation. Exhaust rates and temperature of process to be controlled. Types of air pollutants to be destroyed and in what quantity. Identify known compounds such as silicone, phosphorus, heavy metals, halogen, particulate and/or sulfur that may be present. Types of auxiliary fuel available (natural gas, propane, fuel oil, etc.). Electrical power requirements (voltage, hertz, phase). Installation supervision or complete turnkey installation requirements. Physical installation area and/or site space limitations. Production uses for energy that could be recovered (i.e., hot air, hot water, steam, hot oil).

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"Reduced Energy Costs, Increased VOC Destruction Efficiency Among Benefits Of Retrofitting Older Oxidizer Systems"

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