Organic Acids Can Enhance Wet Limestone Flue Gas Scrubbing

摘要

The paper is an overview of organic acid use to enhance the limestone flue gas desulfurization (FGD) process, and describes the application of the technology in operating FGD systems. The case studies illustrate the potential economic benefits of converting FGD systems to organic-acid-enhanced limestone scrubbing systems. Organic acids were identified as potentially attractive buffering agents for FGD systems more than 10 years ago. Use of the acids to counteract the effects of high concentrations of dissolved salts has resulted in increased SO2 removal efficiencies, lowered operating costs, decreased limestone consumption, increased system flexibility (e.g., ability to respond to unplanned fluctuations in coal sulfur content), and improved process reliability. (Copyright (c) Power Engineering 1986.)