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

Abstract

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 SO 2 removal running in an absorber and a holding tank. It includes absorption of sulfur dioxide, oxidation of SO 3 -, dissolution of limestone, and crystallization of gypsum. An assumption of thermodynamic equilibrium in the solution has been used. SO 2 removal and limestone dissolution calculation has been based on stagnant-film theory. The model has been used for predicting the SO 2 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 liquidphase ions of Mg 2+ 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 data from flue gas desulfurization installation at the Bełchato ´w Power Plant (Poland).

Flue gas desulphurization based on limestone-gypsum with a novel wet-type PCF device

“…However, some correlations have been found to estimate the masstransfer coefficients by means of the theory of diffusion with various conditions. In this study, the gas-side mass-transfer coefficient, k G , was calculated from the Frossling correlation [17]:…”

Transposition of wet flue gas desulfurization using MgO by-products: From laboratory discontinuous batch reactor to pilot scrubber

“…e l s e v i e r . c o m / l o c a t e / f u p r o c great influence of the liquid-to-gas ratio (L/G), the height of the absorption section and the drop diameter over the desulfurization efficiency when performing an optimization assessment [6]. According to Kikkawa et al, there is no difference in the efficiency of desulfurization between granular and pulverized limestone at the same pH and L/G value [7].…”

Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion–Ion Chromatography

“…The halogen concentration in coal is important for environmental and health issues and for coal utilization. In order to estimate the efficiency of coal desulfurization systems, it is important to know halogen concentrations in coal (Warych and Szymanowski 2001).…”