Desulphurization in front of the direction for exhaust gases from the fabric and the thermal power plant with the same

摘要

An exhaust gas desulfurization system of the fabric, in the mercury containing gas is introduced, contains an upstream absorption tower, an upstream absorbance means spray nozzle and an addition of water on a supply unit in a direction of flow of the gas upstream side of a desulfurization in front of the direction of the body. The upstream absorption tower has a circulation tank, which receives the absorption means sludge. The addition of water supply unit leads to additional water into the circulation tank, in order to the chloride ion concentration of the absorbent in the circulation tank is not less than 50.000 ppm to keep. It is thus possible, an exhaust gas desulfurization system of the fabric, with which hg can be prevented therefrom again be released from the desulfurization plant, the purity of the covered gypsum is increased and the use of industrial water can be reduced.