对二甲苯氧化反应器冷凝器模拟  

Modeling of p-xyoene oxidation reactor-condenser

作　　者：王勤波[1] 李希[1] 谢刚[1] 成有为[1] 代伟[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：《浙江大学学报（工学版）》2004年第8期1029-1034,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(20076039);中国石油化工股份公司资助项目(X500029).

摘　　要：建立了一个用于模拟对二甲苯氧化制对苯二甲酸过程的连续气液搅拌釜反应器模型.模型描述了反应器中各组分间的化学反应、气液传质、溶剂和反应物的蒸发移热及塔顶冷凝回流等复杂过程.模拟计算结果与实际工况吻合.用此模型考察了反应压力、冷凝回流温度和回流比对反应过程的影响.计算表明:冷凝回流温度的升高、回流比的降低和反应压力的升高都导致反应温度增加,虽然醋酸和对二甲苯的副反应消耗增加,但液相中对羧基苯甲醛的质量分数降低和反应收率增加.A computer code for simulating continuously stirred gas-liquid reactors of p-xylene oxidation to terephthalic acid was developed. The simulation code accounts for the complex nature of the involved reaction networks, evaporation of volatile liquid reactant and solvent, mass transfer between gas phase and liquid phase, recycling of condensed liquid from the condenser, etc. The performance of the simulation model was tested in comparison with industrial data and proved to be detailed enough for simulating the reaction characteristics. The effects of reflux temperature, reflux ratio and reaction pressure on the oxidation process were simulated. The results show that the yield of terephthalic acid increases and the mass fraction of 4-carboxybenzaldehyde decreases when the reflux temperature or the reaction pressure increases, or when the reflux ratio decreases, but the combustion rate of p-xylene and acetic acid increase simultaneously.

关 键 词：对二甲苯 氧化 对苯二甲酸 反应器 冷凝器 模拟 

分 类 号：TQ018[化学工程]