CAMX 2014 preview: Anguil Environmental Systems

Anguil Environmental Systems Inc. (Milwaukee, Wis., USA) is emphasizing at CAMX 2014 its oxidizer for the manufacture of carbon fiber.

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Anguil Environmental Systems Inc. (Milwaukee, Wis., USA) is emphasizing at CAMX 2014 its oxidizer for the manufacture of carbon fiber. The manufacture of carbon fiber is heavily regulated and producers are continually looking to reduce energy demands of this heat-intensive process. The oxidation and carbonization furnaces and industrial ovens have the potential to emit hydrogen cyanide (HCN), ammonia (NH3) and volatile organic compounds (VOCs).  Some of these pollutants are immediately dangerous to human health, even in very small quantities.  Other pollutants of concern for carbon fiber producers include harmful gases such as carbon monoxide (CO) and nitrogen oxide (NOX).  These emissions not only contribute to global warming but also have a direct correlation with the manufacturer’s consumption of energy. Anguil will emphasize two recent oxidizer installations, one at the University of Nottingham (Nottingham, U.K.) and one at Oak Ridge National Laboratories (ORNL, Oak Ridge, Tenn., USA).

The University of Nottingham is working with The Boeing Co. (Chicago, Ill., USA) on carbon fiber recycling and has developed a pilot scale carbon fiber recycling plant. The team at Nottingham knew that an air pollution control device would be necessary to meet the local emission requirements, but also realized that there was the potential to reuse some of the energy released during the combustion of carbon fiber processing emissions. Anguil was selected to provide the air pollution control system for the University of Nottingham. Anguil manufactured, installed and recently brought online a Thermal Recuperative Oxidizer with dual heat recovery. 

A stainless-steel heat exchanger within the oxidizer reduces the amount of supplemental fuel required to bring the process emissions up to combustion temperatures.  In addition, a secondary heat recovery system downstream of the oxidizer captures most of the remaining heat. This is enough energy to preheat the air for the process equipment. When in operation, very little external heat is required to fuel the Anguil oxidizer or carbon fiber oven, making the entire system self-sustaining. The Anguil oxidizer has achieved 99+ percent destruction rate efficiency at the Nottingham facility.      

A similar system was implemented at ORNL, where the U.S. Department of Energy has built a pilot scale carbon fiber manufacturing line. To treat the exhaust streams coming from the carbon fiber process, Anguil Environmental Systems was commissioned to design, manufacture and install a multi-stage Direct Fired Thermal Oxidizer (DFTO). The abatement system is capable of destroying nitrogen compounds without the formation of NOX.  Gases move through zones within the DFTO under varying conditions where the total emission destruction efficiencies exceed 99 percent with minimal NOX generation. 

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