大型脱硫塔喷淋段气液两相流动与传热的数值仿真及验证

发布时间：2018-04-21 18:45

本文选题：大型喷淋塔 + 气液两相流　；参考：《燃烧科学与技术》2016年01期

【摘要】：对大型湿法脱硫塔喷淋段内部的气液两相流动和传热过程进行模拟,并将模拟结果同现场运行数据进行对比.结果表明:良好的喷淋层和喷嘴布置可对塔内烟气流动起到很好的整流作用;在烟气入口对面的浆液池上方存在一气相的最高压区;原烟气的高速冲入对浆液滴的运动轨迹产生明显的影响,使得烟气入口处形成了一个斜向下呈带状的液滴浓度高值区;喷淋塔内温度梯度变化较大的区域在靠近吸收塔入口的位置,且此区域随烟气量的增大而扩大——简单忽略塔内气相温度场的不均匀性势必将给计算带来误差;喷淋塔内的气相温度场和水蒸气浓度场分布有明显的一致性规律,证明了塔内的降温过程主要为蒸发冷却.
[Abstract]:The gas-liquid two-phase flow and heat transfer process in the spray section of a large wet desulfurization tower were simulated, and the simulation results were compared with the field operation data. The results show that a good spray layer and nozzle arrangement can play a good rectifying effect on the flue gas flow in the tower, and there is a high pressure region of the gas phase above the slurry pool opposite the flue gas inlet. The high velocity of the original flue gas has an obvious effect on the droplet trajectory, which makes a high value region of droplet concentration slanting down to the inlet of the flue gas. The region with large temperature gradient in the spray tower is located near the inlet of the absorption tower, and the region expands with the increase of flue gas content-simply neglecting the inhomogeneity of the gas temperature field in the column will bring error to the calculation. The distribution of vapor temperature field and water vapor concentration field in the spray column is obviously consistent, which proves that the cooling process in the column is mainly evaporative cooling.
【作者单位】：霍尼韦尔中国研发中心;同济大学热能与环境工程研究所;
【基金】：国家高技术研究发展计划(863计划)资助项目(2012AA063504)
【分类号】：X701.3

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