Microprocessor control of rotogravure airflows. Final report, March-July 1985

The report discusses the technical and economic viability of using microprocessor-based control technology to collect volatile organic compound (VOC) emissions from a paper-coating operation. The microprocessor-based control system monitors and controls both the airflow rate and vapor-concentration level within the printing-press dryers. It incinerates the VOC emissions in the plant's existing steam boiler and also saves energy by reducing the amount of dryer and room air that must be heated. The general concept, performance levels, and economic parameters of the evaluated VOC control system demonstrate the potential advantages of the technology for a wide range of applications. Three methods were considered to collect and destroy VOC emissions for the rotagravure operation: solvent recovery, thermal destruction in a dedicated incinerator, and thermal destruction in an existing onsite boiler. For the evaluated system, the use of the existing boiler is the best option even though equipment had to be added to collect, transport, and control the rotagravure airflows.