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Thermal Oxidation Systems

High-temperature thermal oxidation is a longstanding CSM specialty. Our thermal oxidizers accomplish the same oxidation processes as our catalytic oxidizers. However, thermal oxidation is initiated in an oxidation chamber to combust pollutants at the elevated temperature of about 2000 F.

Regenerative Thermal Oxidizers

CSM regenerative thermal oxidizers (RTOs) destroy more than 99% of air toxics and VOCs. Our systems use high-temperature thermal oxidation to destroy VOCs, oxidizing them to CO2 and water vapor, then reusing released energy to reduce operating costs.

Process gas with VOC contaminants enters the CSM RTO through an inlet. A flow control valve directs this gas into a hot direct contact ceramic heat exchanger, which pre-heats the process stream. The process gas is heated in the hot ceramic bed as it moves toward the combustion chamber.

The VOCs are oxidized in the combustion chamber, and exhausting gas exchanges heat to the cooler ceramic bed, thereby reducing the fuel requirement. The cold bed is heated and the gas is cooled so that the outlet gas temperature is substantially reduced. The flow control valve switches beds so that the heating and cooling ceramic beds are reversed. If the process gas contains a high quantity of VOCs, the energy released from their combustion allows self-sustained operation.

Thermal 5000 Film with Scru


SLC-based electronics automatically control RTO operation from start-up to shutdown to minimize operator interface.

Our RTO systems process 5,000 to 25,000 SCFM of VOC- or CO-laden gas using the following key components:

  • A process air blower/motor with an automatic flow control system to push the VOC-laden gaseous stream through the CSM RTO system, which can be designed for vertical flow.
  • A custom, packaged burner system with staged injection of the off-gas, natural gas as fuel and combustion air, which achieves a very low NOx emission rate from the system.
  • An oxidation chamber capable of operating at elevated temperatures ranging from 1400 to 1800 F. It typically operates at 1600 F to treat the VOC-laden process exhaust system and achieve the required destruction efficiency, including 99% of the non-methane hydrocarbon compounds, which are converted to harmless CO2 and water vapor.

The oxidation chamber is constructed of carbon steel lined with rigid castable refractory (Kastolite or an equivalent) rated for operation up to 2300 F. An independent control panel automatically records temperature rise due to VOC oxidation and controls fuel input to the burner in order to maintain a set operating temperature. An Allen-Bradley SLC-500 series processor is used for system control, and a Panelview touch-screen graphics panel for easy operator interface. In addition, all CSM RTO systems are pre-wired, pre-piped and tested at the manufacturing facility prior to shipment.

Recuperative Oxidizers

When appropriate, CSM thermal oxidation systems use a recuperative air-to-air hear exchanger to pre-heat the VOC-laden stream by recovering heat from the thermal oxidizer's clean hot exhaust, which can reduce operating costs significantly. Up to 70% heat recovery can be achieved with a fully welded, stainless steel, fin-and-plate or shell-and-tube, air-to-air, recuperative heat exchanger from CSM. Our selection features low pressure drop, compact and modular construction, and high heat recovery efficiency.

Direct Thermal Oxidation and Scrubber

For 99.9% destruction efficiency of highly toxic materials, CSM offers our direct thermal oxidizers, followed by Quench and Scrubber. This type of oxidizer is designed for applications of low flow rates and high operating temperatures. Compounds in the effluent from the oxidizer could be acid gases of halogens, nitrates or sulfides. CSM's Quench and Scrubber technology has a proven track record of years of successful, continuous operation.





CSM Worldwide, Inc. 1100 Globe Avenue, Mountainside, N.J. 07092-2904 | Phone: 908-233-2882 | Fax: 908-233-1064


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