published in Energetica India, September 2019
Tighter control of Sulfur Oxides (SOx), Nitrogen Oxides (NOx) and particular matter (PM) has become a priority for many countries around the world. As an example, India’s Ministry of Environment & Forest (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, SO2 emissions for all operating plants in India that are 500 MWe or larger must not exceed 200 mg/Nm3 and all new coal plants regardless of rating and other special category plants must meet even tighter SO2 limits of 100 mg/ Nm3 (Table 1). In other words, for an existing coal plant with baseline SO2 emissions ranging from 1200 – 1400 mg/ Nm3 this amounts to an 80-90% SO2 emissions reduction from uncontrolled levels.
The circulating fluidized bed (CFB) scrubber is growing in popularity with plants up to approximately 600MW. Indian plant owners who are highly sensitive to the construction cost will be pleased to learn that CFB scrubbers have an installed cost approximately 60% of a similarly sized wFGD system.Read full article