Integrating Flue Gas Conditioning with More Effective Mercury Control

摘要

Utilities are faced with many balance- of-plant challenges as retrofitted pollu- tion control equipment begin operation in order to control Acid Gas and Mercury emissions as outlined in the EPA Mercury and Air Toxics Standards (MATS) rules. However, many techniques previously used to enhanced plant performance in the end, might also hinder compliance strategies. Compliance strategies are dependent upon current and anticipated fuel types, as well as existing installed air pollution control systems. Additionally, many older, marginally sized electrostatic precipi-tators (ESPs) that rely on trace levels of SO_3 in the flue gas to maintain optimum particle resistivity ranges might have to use alternative methodologies, as a result, capturing mercury might come at a higher cost and with more complexities and potentially result in loss of fly ash sales as well.