气相法聚乙烯冷凝模式操作的模拟研究(Ⅰ) 反应器运行状态的分析  

SIMULATION OF GAS-PHASE POLYETHYLENE WITH CONDENSED MODE OPERATION(Ⅰ) ANALYSIS OF REACTOR PERFORMANCE

作　　者：杨荆泉[1] 陈伟[1] 阳永荣[1] 戎顺熙[1] 

机构地区：[1]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《化工学报》2001年第10期877-884,共8页CIESC Journal

摘　　要：建立了气相法聚乙烯冷凝模式操作反应器的两相模型 .模型涉及气泡相和乳化相中的热量和质量守衡、乳相和泡相之间的热量传递和质量传递、乳相中的聚合反应以及乳相中粒子的停留时间分布等 .通过模型研究了常规操作和冷凝操作时操作变量和反应器运行状态变量之间的关系 .模型模拟结果与工业的常规操作和冷凝操作数据符合较好 .得到了冷凝操作时时空收率、低温区域、聚合物灰分等的变化规律以及催化剂特性对冷凝操作的影响规律 .A novel two-phase model for the fluidized bed of polyethylene with condensed mode operation was proposed.The model considered heat and mass conservation in emulsion phase and bubble phase, heat and mass transfer between emulsion phase and bubble phase,polymerization as well as resident time distribution of particles in emulsion phase.The relations between operating variables and reactor performance were investigated by the model.Simulation results agreed well with the industrial data.Simulation results indicate the productivity of reactor as well as ash in polymer will increase greatly, and low the temperature region will expand when the condensed mode is operating with the conventional catalyst.A type of catalyst which suits condensed mode operation was proposed.

关 键 词：聚乙烯 流化床 冷凝模式 模拟 气相法 反应器 运行状态 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ018