Numerical simulation of coal gasification in OMB coal gasifier

摘要

A comprehensive model was used to simulate the multiphase reaction flow in entrained flow gasifier in this paper.The model of computation was based on gas-phase Eulerian balance equations and the realizable k-ε turbulence modelwas applied to close the Reynolds-averaged Navier-Stokes equation.The particle phase was described by Lagrangianequation of motion. The eddy-dissipation-concept model and unreacted-core shrinking model were used to simulate thehomogeneous and heterogeneous reactions. The P1 radiation model was adopt to model the radioactive heat transfer ingasifier. The results show that the simulated carbon conversion, outlet gas concentration and temperature were agreedwith the industrial performance data. The two phases flow field, temperature and species concentration distributions ingasifier were illustrated. The influences of gasifier pressure and O_2/Coal ratio on gasification performance werediscussed.