Study On Numerical Simulation Of Combustion Scheduce Affects To Glass Flow In Glass Tank

Based on analyzing the domestic and overseas development of numerical simulationg on glass furnace and establishes a three-dimensional mathematical model of cell glass furnace in the oxygen-fuel glass furnace, which consisting of flow model composed of mass conservation equation, momenutum conservation equation, energy conservation equation as well as the standard k-εmodel; chemical reaction model composed of eddy-dissipation model and radiation model composed of discrete ordinates model. Based on the object of an annual output of 2000 tons fiber glass furnace, and obtains simulation results by using UDF program to combine combustion space and glass tank through the one-way couple from the software FLUENT. The concrete research content and results are as follows:1. Based on the actual size of furnace, the geometric model and mesh creation of glass furnace was set up by using the software GAMBIT in former course of treatment. Using the grid increase technology in the spray gun, this can cause the simulation result to be more accurate.2. Carries on has the goal date acquisition for the actual glass furnace, has established hot boundary condition computation model based on the numerical simulation software, reduced to the numerical simulation boundary condition supposition, and the simulation result can more reflect the actual situation in the glass furnance than before.3. Carries on the numerical simulation to the actual oxygen-fuel glass fiber furnace, analysis whether the existing combustion schedule rationality, and carries on the model verification. The results showed that, obtained the temperature field, the velocity field and the pressure field distribution simulation result from the combustion space, satisfies the existing craft request. Temperature distribution is reasonably in glass tank. Simultaneously also obtained the glass flowing produces the feeding back flow, clanification back flow and delivery back flow are quit obvious, and its postion distribution is also quite reasonable. The existing combustion schedule produced some insufficiency, for example, the air current impact crown against as well as the influence glass flowing. This because the air speeds of flow is created oversizd. Through compared with measured data, the total relative error between -4.12—5.19%, explained the simulation result has the very high accuracy and the confidence level.4. Carries on the comparison to the oxygen combustion and the air combustion simulation result. The results showed that, Compares under the oxygen combustion with the air combustion the combustion space temperature distribution to be reasonable, the gas flow rate is stable, this has manifested the oxygen combustion schedule are superiority, and provided the theory support for the entire oxygen combustion system's widespread application.5. In view of insufficiency of the existing combustion schedule has found the more reasonable combustion schedule through numerical simulation method. The results showed that, The spray gun is being apart from liquid level high 0.5m the place installment to be appropriate highly, simultaneously to the current capacity big two pair of spray gun arranges 500mm distance, this can guarantee the original thermal efficiency in the original furnace and to be able to reduce the haze to the injury which crown goes against creates.6. Carries on the numerical simulation after improving the combustion schedule, and compared with the original simulation result. The results showed that, the original exists deficiency alredy vanished. To combine with the glass flowing and heat transfer effect, can see the three backflows have more obvious than before, and showed the existing combustion schedule is more appropriate than before.