CFD modeling and thermodynamic analysis of a concept of a MILD-OXY combustion large scale pulverized coal boiler. (1st December 2017) - Adamczyk, Wojciech P.
Abstract: A concept of a large scale pulverized coal boiler working in the oxycombustion mode has been proposed. The combustion chamber has been designed using the Moderate and Intensive Low-oxygen Dilution (MILD) combustion technology. By screening CFD solutions of several geometric configurations the best one has been selected, for which the dependence of the oxygen excess ratio and recirculation rate of the flue gases analyzed onto the efficiency of the combustion chamber has been investigated. The results of the CFD simulations have been then embedded into a process model of the entire plant. The preliminary simulations show the possibility of efficiency increase of more than 3% points. Highlights: A new large scale pulverized coal combustion boiler is proposed. MILD and OXY combustion techniques are combined in the system. CFD model was developed and used to simulate the process. Results indicate possibility of using the advantages of both technologies. Possibility of increasing efficiency of the power plant was shown.