Circulating fluidised bed scrubber technology: A low-cost dry flexible multi-pollutant emissions control option for the Indian power market

摘要

Tighter control of sulphur oxides (SO_x), nitrogen oxides (NO_x) and particulate matter (PM) has become a priority for many countries around the world. As an example, India's Ministry of Environment & Forests (MOEF) has issued stringent regulations that affect an estimated 140 GW of operating coal-fired power plants and all new plants built in the future. By 2022, SO_2 emissions for all operating plants in India that are 500 MWe or larger must not exceed 200 mg/Nm~3 and all new coal plants regardless of rating and other special category plants must meet even tighter SO_2 limits of 100 mg/Nm~3 (Table 1). In other words, for an existing coal plant with baseline SO_2 emissions ranging from 1200 to 1400 mg/Nm~3 this amounts to an 80-90% SO_2 emissions reduction from uncontrolled levels.