Case-Hoyt/Rochester Corporation Printing Waste Heat Recovery Project

摘要

The report documents a demonstration project aimed at recycling the waste heat produced during the ink-drying process at a lithographic printing plant. An emissions control and heat recovery system was designed to accomplish three things (1) reduce gas consumption in dryers, (2) minimize VOC emissions to the atmosphere in the most efficient manner possible, and (3) recover energy from the exhaust to heat part of the building during the winter months. To reduce dryer gas consumption, a unique Lower Flammability Limit (LFL) control system was installed at each press. These systems modulate the exhaust flow of each dryer based on solvent concentration. A central catalytic oxidizer was installed to reduce VOC emissions to the atmosphere and to provide preheated make-up air to the building through the use of a secondary heat exchanger. System energy consumption was monitored for one year and compared to previous energy usage.