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详细分析并建立了锅炉多相流动与燃烧模型。利用该模型对改造前切圆锅炉水平烟道烟温、烟速偏差进了数值模拟,计算结果和实际运行状况一致,证明了模型的可行。数值研究表明:上二次风反切和小切圆可以有效减小水平烟道烟温烟速偏差,综合比较,上一次风反切是更为可行的改造方案。
The boiler multiphase flow and combustion model is analyzed and established in detail. The model was used to simulate the smoke temperature and the smoke velocity deviation in the horizontal flue of the pre-modified tangentially fired boiler. The calculated results are consistent with the actual operating conditions, which proves that the model is feasible. Numerical results show that the upper quadratic wind and the small tangent circle can effectively reduce the variation of smoke temperature and smoke velocity in the horizontal flue. Comprehensive comparison shows that the last wind reverse is more feasible.