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数值模拟计算在很多行业为设备的设计、计算提供了可靠的数据。为了验证数值计算对风水联合冷渣器这类设备的预测能力及为以后的设计改型提供依据,本文采用FLUENT软件,在特定情况下对风水联合冷渣器内气固两相运动情况作了数值模拟。主要研究不同粒径固体颗粒在冷渣器完全流化的前提下的运动轨迹,并将典型的计算结果与实际进行比较。计算中选用欧拉拉格朗日模型,计算几何尺寸参照冷渣器的实际尺寸,网格为非结构化网格,进口边界条件按照实验测定值给定。结果表明:冷渣器采用不均等配风,出渣效率较高;流场湍能变化明显,总体流场比较均匀,出口处速度最大;隔墙附近有涡流存在有利于颗粒翻越隔墙,同时隔墙还起到对渣的粒径进行分选的作用;灰渣颗粒进入冷渣器的速度不能太大,否则冷渣器不能起到冷却作用。
Numerical simulation has provided reliable data for the design and calculation of equipment in many industries. In order to verify the numerical calculation of feng shui combined with slag cooler prediction ability of such equipment and to provide a basis for the future design and modification, this paper uses FLUENT software, under certain conditions of feng shui combined with slag cooler gas and solid phase motion made Numerical Simulation. The main research is on the movement trajectories of solid particles with different particle sizes under the condition of complete fluidization of slag cooler, and the typical calculation results are compared with the actual ones. The Eulerian-Lagrangian model was used in the calculation. The geometrical dimensions were calculated with reference to the actual size of the slag cooler. The grid was an unstructured grid. The inlet boundary conditions were given according to the experimental values. The results show that the slag cooler has the advantages of unequal air distribution and high slag discharge efficiency. The turbulent energy of the flow field changes obviously, the overall flow field is more uniform and the exit speed is the highest. Eddy current near the partition wall is helpful for particles to cross the partition wall, Partition wall also plays a role in sorting the particle size of slag; ash particles into the slag cooler speed can not be too large, otherwise the slag cooler can not play a cooling effect.