Numerical Simulation Of Combustion Space Of Oxy-combustion Of Natural Gas-fired Float Glass Furnace And Study Of Different Horizontal Width Of The Melting Pools At The Bottom

This thesis reviewed systematically the development of numerical simulation for oxy-fuel combustion of glass melting furnaces, and established three-dimensional mathematical model of injection entrance nature-gas fired oxy-fuel glass furnaces on the base of theory of glass melting furnaces and industrial application. The model includes standardκ-εturbulent model, Eddy-Dissipation combustion model, DO radiation model, glass flow motion model and so on. Gambit as a pre-processing software was used to establish three-dimensional glass furnace model, and the CFD software is FLUENT. The result showed that:Numerical simulation of combustion space of a float glass furnace with 550t/d was performed. Study the distribution of the flow field and temperature field in the combustion space, analyzed qualitatively influence of the temperature field and flow field on the glass melting and corrosion of the roof and the parapet in the flame space.Numerical simulation of melting tank in a float glass furnace with 460t/d was performed. The influence on production capacity, temperature field and flow field were investigated in float glass furnace, under different horizontal width of the melting pools. The simulating results showed that, the situation of glass flow in the neck and cooling will not be significant changed by reducing the horizontal width of the melt pools at the bottom, and thus does not affect the furnace capacity. But different horizontal width of the molten pools at the bottom will result in temperature field change of melting pools, axial surface of temperature decreases, while the parapet temperature increases, which will lead to change of horizontal temperature gradient, exacerbate horizontal convection of glass flow, and will help homogenization and clarification of glass flow.In order to analyze the calculation results conveniently, tecplot as a post-processing software was used to deal with numerical simulation results, and the distribution of the flow field and temperature field was expressed intuitively.