摘要
为开发一个优化的甲醇精馏提纯工艺,以解决甲醇产品纯度低而影响与汽油、柴油混合均匀性、低温稳定性等问题,利用PRO/Ⅱ化工流程模拟计算软件,以醇类、水作为关键组分,采用修正的ALCO、NRTL模型分别对预精馏塔、回收塔和加压塔、常压塔进行了甲醇四塔精馏流程模拟计算。对进料位置、回流比、理论板数、进料温度、操作压力进行了模拟优化。模拟结果表明,四塔流程生产出的精甲醇产品在纯度、水含量、乙醇含量和甲醇回收率上较二塔、三塔流程有较大的提高,显著提高了精甲醇与汽油或柴油的混合均匀性,改善了混合相的低温稳定性,且装置能耗低,操作稳定、灵活。
In order to develop an optimal distillation process for methanol purification to resolve the problems of solubility and low temperature stability of methanol-gasoline and methanol-diesel fuel influenced by lower purity of methanol product,the four towers flow in methanol distillation process is simulated and calculated utilizing PRO/Ⅱ software,while taking alcohol and water as key components,selecting adjusted ALCO and NRTL model for pre-distillation tower and recovery tower,pressure-increased tower and atmospheric tower.The feed location,reflux ratio and the number of theoretical plates for each tower,feed temperature and operating pressure are simulated and optimized.The results indicate that,the purified methanol product by four towers flow has higher purity,lower water and ethanol content,higher methanol recovering yield than by two or three towers flow,thus the solubility of methanol-gasoline or methanol-diesel fuel is enhanced,the stability in low temperature is improved,while the unit has lower energy consumption as well as more stable and flexible operation.
出处
《现代化工》
CAS
CSCD
北大核心
2006年第z2期324-327,共4页
Modern Chemical Industry
