Much attention is being paid to SO_2 from coal-fired power plants by our government. One of the main tasks during the eleventh five-year plan is to reduce the total discharge of SO_2. The industry of flue gas desulfurization has large market and expanded space. The CFB-FGD is widely applied with its advantage. CFB-FGD has been used in 300MW power plant which was largest in CFB-FGD technology. But disadvantages of CFB-FGD are obvious, such as easy deviation of flow field, ununiformity of flow especiall...