甲醇制丙烯反应器喷嘴雾化性能的研究  

Investigations on the spraying properties of spraying nozzles distributed in Methanol-to-Propylene(MTP)reactor

作　　者：庄壮[1] 匡建平[1,2] 雍晓静[1] 梁健[2] 罗春桃[1] 张世程[2] 

机构地区：[1]神华宁夏煤业集团有限责任公司煤炭化学工业分公司研发中心,宁夏银川750411 [2]中国船舶重工集团公司第七一一研究所,上海201108

出　　处：《化工进展》2016年第B11期121-126,共6页Chemical Industry and Engineering Progress

基　　金：国家国际科技合作专项项目(2015DFA40660);宁夏回族自治区宁东能源化工基地科技创新项目(2014NDKJ100);中国科学院2014年度"西部之光"人才培养计划

摘　　要：雾化喷嘴系甲醇制丙烯(MTP)反应器内的关键反应物料分配构件,其雾化性能的优劣直接影响着对应催化床层覆盖区域内的传质和传热,从而影响到床层出口反应产物的分布。以反应器六级床层对应的雾化喷嘴为研究对象,分别以氮气(N2)和水(H2O)作为气相和液相模拟介质,通过"冷模"实验,考察了喷嘴气(液)流量与入口压力之间的关系,研究了喷嘴在不同气液比(G/L)下雾化粒径、雾化角度及雾化覆盖直径的变化规律。实验结果表明,喷嘴液相质量流量随着入口压力增大而逐渐增加,气相质量流量随着入口压力增加而迅速增加;当保持液相进料量为43.54kg/h时,喷嘴由一次雾化变为二次雾化后,雾化角度由96.1°降至15.6°;当气液质量比G/L达到12.19时,雾化覆盖直径达到720mm,且雾滴的索泰尔平均粒径为16.3μm。Spraying nozzles designedly arranged in Methanol-to-Propylene （MTP） reactor are crucial distributors for the feedings of reactants. The atomizing properties of the nozzles take a direct effect on heat and mass transfer occurred in the nozzle-controlled areas correspondingly to catalytic bed, and thereby, the components of reaction products coming from the outlet of the catalytic bed is definitely affected by the heat-mass transfer. The nozzle of sixth catalytic-bed chosen as an experimental example was investigated by a cold model experiment. Nitrogen and water were taken as gas and liquid reactants respectively for testing the spraying properties. The relationships between gas （liquid） mass-flow and inlet pressure were investigated. Simultaneously, sauter mean diameter （SMD）, atomizing angles and droplet-covered diameters （DCD） were also analyzed under different gas-liquid ratios （G/L） . The experimental results show that the liquid mass-flow increases gradually with the inlet pressure, but the gas mass-flow increases rapidly with the inlet pressure; while the liquid feeding of the nozzle maintaining at 43. 54kg/h, the atomizing angle decreases from 96. 1° to 15. 6° after changing from primary atomization to secondary one. When the gas-liquid ratio G/L varies to 12. 19,SMD reaches to 16.3μm, and meanwhile, DCD of the nozzle is 720mm.

关 键 词：甲醇制丙烯 固定床 雾化喷嘴 气液质量比 索泰尔平均粒径 

分 类 号：TQ022.4[化学工程]