滴流床反应器内喷射型分布器的雾化和均布性能  

Atomization and distribution performance of spray distributor in trickle-bed reactor

作　　者：何磊 梁健 俞嘉琳 杨冰冰 揭涛 He Lei;Liang Jian;Yu Jialin;Yang Bingbing;Jie Tao(Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)

机构地区：[1]中国船舶集团有限公司第七一一研究所,上海201108

出　　处：《石油化工》2021年第10期1045-1051,共7页Petrochemical Technology

摘　　要：针对某化工厂滴流床反应器内的喷射型液体分布器,以空气和水为实验介质,通过冷模实验考察了不同操作工况下该分布器的雾化和均布性能,重点研究了雾化喷嘴的流量特性、雾化粒径、雾化角、液滴分布等特性,并根据分布器对液体的流量分配情况,构建了整个反应床层的液体分布云图。实验结果表明,雾化喷嘴的入口压力与液相流量的变化呈二次函数关系,分布器内的阻力损失基本不会对喷嘴的流量特性产生影响;随入口压力提高,喷嘴的雾化粒径大幅减小,而雾化角度逐渐增加至83°后基本保持不变;在整层分布器中,各喷嘴出口的流量偏差均在±8%以内,且提高操作负荷能够使液体的分配更加均匀;额定工况下,采用此种分布器,反应床层上的雾化液滴覆盖率为91%,液体分布均匀,且能够有效避免壁流效应。The spray distributor in a trickle-bed reactor chosen as an experimental example was investigated by a cold model test.Air and water were used as test mediums to test the atomization and distribution performance of the distributor under different operating conditions.The fluid flow characteristics,atomized particle diameter,atomizing angles and droplet distribution of the nozzle were mainly studied.And the droplet distribution of the whole reactor bed was built based on the fluid flow distribution characteristics of the distributor.The results show that the inlet pressure of atomizing nozzle has a quadratic function correlation with the change of fluid flow,and the resistance loss in the distributor has little influence on the flow characteristics of the nozzle.With the increase of inlet pressure,the atomized particle diameter decreased drastically,while the atomizing angle remained almost unchanged after gradually increasing to 83°.In the whole distributor,the outlet flow deviation of each nozzle is within±8%,and improving the operating load can make the liquid distribution more uniform.Under the rated condition,the coverage rate of the droplet on the reaction bed is 91%in such distributor.The liquid distribution is uniform,and the wall flow effect also can be effectively avoided.

关 键 词：滴流床反应器 喷射型分布器 液体分布 雾化 

分 类 号：TQ052.5[化学工程]