Study On Integrated Technology Of Activated Coke Desulfurization And Regeneration For Coal-fired Flue Gas Treatment

The active coke dry desulfurization technology has the advantages of no water consumption,no waste discharge,and environmental friendliness.The high concentration SO2 gas desorbed by saturated active coke has high economic value,has great development potential and broad application prospects desulfurization technology has been applied in the field of industrial pollutant control.China started late in the development and application of activated coke technology.It still lacks independent intellectual property rights for recyclable and large-scale active coke desulfurization technology and equipment,and it still has a large dependence on foreign technologies.In this paper,the mechanism of desulfurization and regeneration of activated coke was experimentally studied.It was determined that the reaction conditions of desulfurization of activated coke are SO2 volume concentration of 0.07%,O2 volume concentration of 6%,active coke reaction temperature of 110℃～120℃,and water vapor volume concentration About 7%～9%.Based on the adsorption model and adsorption theory,the effects of inlet SO2 concentration and reaction temperature on the active coke sulfur capacity and adsorption equilibrium during the desulfurization of active coke were studied.The fitting curves and correlation coefficients of these models are used to determine the adsorption model with the best fit and obtain the adsorption equation with the best linear correlation.By analyzing the advantages and disadvantages of the moving bed desulfurization process and the fixed bed desulfurization process and drawing on the advantages of the two technologies,a rotary activated coke adsorption and regeneration integrated process was proposed to reduce the dependence of the desulfurization system on the stability of the transport device and reduce the activity Coke abrasion consumption;this process can achieve continuous operation,effectively solves the disadvantages of the fixed bed active coke desulfurization system cannot be continuously operated,and provides a reference for the design and optimization of the active coke desulfurization system in the future.