Status of Flue Gas Desulphurisation (FGD) systems from coal-fired power plants: Overview of the physic-chemical control processes of wet limestone FGDs

Prediction of SO2 removal efficiency for wet Flue Gas Desulfurization

A model for performance optimization of wet flue gas desulfurization systems of power plants

Simulation of the operation of an industrial wet flue gas desulfurization system

Full-scale measurements of SO2 gas phase concentrations and slurry compositions in a wet flue gas desulphurisation spray absorber

A detailed process model of the wet limestone flue gas desulfurization system has been presented. This model can be used to calculate indispensable parameters for estimating costs and next to minimize capital and operating costs. The process model describes most important stage of SO2 removal running in an absorber and a holding tank. It includes absorption of sulfur dioxide, oxidation of SO3-, dissolution of limestone, and crystallization of gypsum. An assumption of thermodynamic equilibrium in the solution has been used. SO2 removal and limestone dissolution calculation has been based on stagnant-film theory. The model has been used for predicting the SO2 removal efficiency in the spray scrubber for process parameters, e.g., L/G, droplet diameter, stoichiometric ratio Ca/S, height of the absorption section, gas velocity, concentration in liquid-phase ions of Mg2+ and Cl-, and liquid pH. This model could be used to describe a multilevel spray system, too. The results of this model are in agreement with d...

Model of the Wet Limestone Flue Gas Desulfurization Process for Cost Optimization

In this article the method of cost optimization of the Wet Limestone Flue Gas Desulfurization System is presented. The optimization calculations include process and cost models. The process model describes the most important stage of SO 2 removal that runs in the absorber and in the holding tank. It includes absorption of sulfur dioxide, oxidation of SO 3 2- , dissolution of limestone, and crystallization of gypsum. The model was applied to calculate indispensable parameters for estimating costs and then to minimize capital and operating costs. Costs of all important equipment were estimated, such as SO 2 removal systems with the absorber and the holding tank, reagent feed system with the ball mill and dewatering gypsum slurry system. Optimum values of the process parameters for different conditions of running flue gas desulfurization system were found. The process and cost model can be useful when designing the wet limestone FGD systems and carrying out economic analysis of the flue gas desulfurization plants.

Marek Szymanowski

Papers

Model of the Wet Limestone Flue Gas Desulfurization Process for Cost Optimization

Optimum values of process parameters of the Wet Limestone Flue Gas Desulfurization System