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中文摘要：
煤炭在气化炉中经过一系列化学反应得到含有固体颗粒物的高温粗煤气，这种高温粗煤气不能直接被工业应用，需要经过冷却，采用喷水冷却方式不仅冷却效率高还能起到除尘的效果。本文利用CFD技术对某气化炉中对置喷水冷却效果进行了考察。计算采用欧拉-拉格朗日方法分别对烟气和冷却液滴进行处理，定义无量纲量—温度分布不均匀度（TNF）来确定喷水冷却段高度，计算结果与设计温度符合较好。计算结果表明在采用较小喷水滴径的条件下，单级冷却比双级冷却更经济。
英文摘要：
A series of chemical reactions happen in the coal gasifier and as a result, high temperature syngas is obtained which contains a lot of solid granules. The high-temperature syngas must be cooled, because it can not be utilized directly. The opposed water spray cooling is not only effective, but also could dedust the syngas. In the present study, the CFD technique is used to investigate the effect of the opposed spray cooling in a gasifier. The Euler-Lagrange method is applied to deal with the syngas and the water droplets respectively. A non-dimensional pa- rameter Temperature Non-uniform Factor（TNF） is defined to confirm the height of the cooling section. The simulated results match the designed data well. If water droplets with small diameters are used, the single-stage water spray cooling is more economic than the two-stage water spray cooling.
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