A mathematical model for motion and evaporation behavior of a quench oil droplet in high temperature pyrogas flow was developed. The motion and evaporation of the oil droplets in the quencher were analyzed through numerical calculation. The characteristics of the droplet evaporation and its motion trajectory were discussed. The results indicated that small initial droplet diamerer and high pyrogas temperature could accelerate the evaporation of the droplets. At different initial jet velocities of the droplets, both penetration and survival time of the droplets in the gasflow changed very little. The increase of the initial droplet jet velocity could not accelerate the evaporation obviously. The initial diameter of the droplet and its cross angle had evident effects on the droplet trajectory. The critical cross angle of the droplets was about 137° under the conditions of initial droplet diameter 1.0 mm, pyrogas flow velocity 10.0 m/s and initial jet velocity of quench oil 24.0 m/s.%建立了错流射流单液滴蒸发运动过程的数学模型,对急冷器内急冷油液滴运动蒸发过程进行了数值模拟,探讨了液滴运动轨迹和蒸发特性.模拟结果表明,液滴初始直径越小,裂解气流温度越高,液滴蒸发越快,液滴生存时间越短；初始射流速度对急冷油液滴在裂解气流内的贯穿距离和生存时间影响较小,提高初始射流速度,并不能明显加速液滴蒸发；液滴初始直径、射流角度对液滴运动轨迹有较大影响；在液滴初始直径为1.0mm、裂解气速度10.0 m/s、急冷油初始射流速度24.0 m/s的条件下,临界射流角度约为137°.
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