Treatment of Waste Water
from Coal-Fired Power Stations

Flue gas harmful to the environment is generated in coal-fired power stations which is meanwhile desulfurized in modern plants. The power station operators use milk of lime for neutralisation during flue gas desulfurization and convert into a consistency that can be used directly by the gypsum construction industry for manufacturing plasterboard. The use of decanters in China shows how this resource-conserving process is realized on an industrial scale and the advantages of waste water treatment in the waste water treatment plants of power stations.

To ensure further dynamic economic growth, China needs an energy production that can keep up with this rapid development. Because China has large reserves of coal, it is stepping up the process of expanding its coal-fired power stations which already supply approximately 70 percent of the country’s power requirement. New power stations are being built, mainly in the major industrial centers such as Tianjin near Beijing, Shanghai, Guangzhou and increasingly in the special economic area of Shenzhen. The Taishan power station in the South of Shanghai alone is expected to produce 3 GW of power making it one of the largest coal-fired power stations in the country. The decanter type UCC 450 has already been installed in this plant to dewater the flue gas washing liquid with a capacity of up to 20 m³/h.