Organization And Simulation Of Mercury Control System By Activated Carbon Injection In Coal-fired Power Plant

This thesis belongs to an advanced research of basic theory of coal -fired boilers emission pollutant control by activated carbon injection,especially un-burnt carbon.Through learning chemical process during heavy metal-Hg absorbed by sorbent,model outline and calculation procedure of absorption reaction was list systematically.And then get down to research sorbent particles' distribution and diffusion in the duct using Discrete Phase Model.In the part of simulating flow field where mixed activated carbon particles and flow gas,the author designed thirty working conditions from different perspective,such as different emitted dose(6.41117×10^-5kg/m³,1.60279×10^-4kg/m³,3.20558×10^-4kg/m³), different number of activated carbon injection lances(4 lances,6 lances),different number of jets,different injection types(single jet direct injection,double jets with angle injection),and simulated sorbent disposition in the flue.Using FLUENT soft,the isothermal flow field in duct is simulated using the k-epsilon Model(2 eqn) Realizable.By analysis of velocity cloud chart and scatter gram of particle concentration,the optimum organization program was gained.And then trace the sorbent particle track in order to get prepared to simulate capture process of gas phase mercury.This research provided a reliable theory support and data reference for the future actual projects.