论文部分内容阅读
以正戊烷-水为物系,进行了采用填料强化的鼓泡塔直接接触蒸发换热实验。实验采用顺流操作,考察了分散相流量、温差以及分布器孔径对体积换热系数和汽化高度的影响。实验得出:在戊烷流量为23.868 L/h,分布器孔径为2.5 mm时加填料的鼓泡塔的体积换热系数约为未加填料的2倍;在一定的操作条件下,加填料的鼓泡塔中汽化高度随分散相流量和分布器孔径的增大而增加,随温差的增大而减小;加填料的鼓泡塔中体积换热系数随分散相流量的增加而增加,随分布器孔径的增大而减小,与温差成负幂指数关系。
With n-pentane - water as the system, the packing-enhanced bubble column direct contact evaporation heat transfer experiment was carried out. In the experiment, the effect of flow rate, temperature difference and distributor aperture on the volumetric heat transfer coefficient and vaporization height were investigated. The experimental results show that when the flow rate of pentane is 23.868 L / h and the distributor pore diameter is 2.5 mm, the volumetric heat transfer coefficient of the packed bubble column is about twice as that of the unfilled one. Under certain operating conditions, The bubble height increases with the increase of disperse phase flow and distributor pore size, and decreases with the increase of temperature difference. The volumetric heat transfer coefficient increases with the flow rate of disperse phase, With the distributor aperture increases and decreases, and the temperature is a negative exponential relationship.