Application And Performance Of WFGD System Of Pannan Power Plant

China is a country mainly energized by coal and coal maintains over 70 percent of our national energy production and consumption. Coal consumption continuously increases with rapid economy development. And the subsequent emission of SO₂ heavily polluted the atmosphere. The high density of SO₂ and acid-rain are greatly affecting the health of human beings, destroying the ecosystem and damaging the industrial and agricultural production. It was estimated that the annual loses caused by acid rains in Guangdong, Guangxi, Sichuan and Guizhou were exceeded RMB16 billion. The control and settlement of SO₂ emission become critical issues for our economy development.Power generation and coal mining are the major reasons for acid rains and SO₂ emission. Coal-fired power plants and all kinds of industrial boilers are the major origins for SO₂ emission and acid rains. By now, the emission from coal-fired power plants accounts for about two-third of national SO₂ emission. Therefore, desulphurization of coal-fired power plants, reducing the SO₂ emission is the key issue in the future.Lime/Limestone wet flue gas desulfurization (WFGD), as a mature and pretty high desulfurization efficiency technology, is widely applied in coal-fired power plants around the world. Because limestone - gypsum flue gas desulfurization system operating parameters is relatively complex, different conditions and parameters directly affect the desulfurization efficiency and cost.The thesis takes an academic and practical research on the effects of absorbefacient PH value, temperature, liquid-to-gas ratio etc. to the desulfurization efficiency and concludes their variety relationship. It is known from the experiment data that the PH value of absorbefacient should be controlled within 5.2 to 5.7. Lower the inlet temperature of absorbefacient may significantly increases the desulphurization efficiency. Based on the operation experiments and performance tests of WFGD system in Pannan Power Plant, the systemic desulphurization efficiency is calculated as 95 percent or above.Based on the above experimental, By establishing the Nerve Network Response Model on desulfurization costs and operational adjusted parameter, the thesis investigates control optimization of the WFGD system in Pannan Power Plant. The optimized solution indicates that the model can estimate and command the desulphurization costs, as well as solve the parameter benchmark in different operation conditions. With genetic arithmetic, and satisfying with outlet SO₂ emission requirements, it achieves the adjusted method with lowest operation costs which provides a theoretic basis for optimization of desulfurization system operation as well as economic improvement.