| Because of the low cost, high stability and high efficiency desulfurization, Limestone-gypsum wet flue gas desulfurization technology is the most widely used in the world. For the serious congestion and corrosion problems of gas gas heater, it’s no longer located in the new units. The cancel GGH has brought serious "gypsum rain" problem. The "gypsum rain" problem has already affected the safe operation of thermal power plants and the surrounding environment seriously. To solve the problem of the "gypsum rain", the blocking mechanism of "gypsum rain", the affecting factors in the formation of gypsum rain, mist eliminator performance have been studied. This paper use software to simulate and optimize fluent flue gas desulfurization tower flow field, In order to improve the efficiency of desulfurization and mist eliminator, fluent is used to simulate and optimize the flow of the flow gas.Fluent is used in the numerically simulate of the gas-liquid two-Phase flow in the 300MW desulfurization spray tower. The Gambit is used for modeling and meshing in this article. There are mang modles are applied in numerically simulate of the flow field and temperature field, including the standard k-ε turbulent Model, the Discrete Phase Model and the Porous Medium Model. For the serious "gypsum rain" problem, we put forward two kinds of rehabilitation programs containing optimization entrance and processing spoiler. Simulation results showed:the flow velocity distribution is the most uniform in the section of each spray layer and demister by the rehabilitation program of Optimized entrance and curved spoiler.Finally, some control measures of "gypsum rain" are discussed in some respects, including the design of the system, the selection of the equipment and operation. Then we analysis the feasibility and economic transformation via the 300MW units of the Power Plant. By studying the control measures of "gypsum rain", some reasonable suggestions for the optimization design and operation are given. |
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