摘要
针对宽沸程物系精馏分离的特点,提出了分段设计方法,即按浓度从进料到产品分段,每段分离的纯度不同,实现热量集成。温度-负荷曲线图(T-Q图)给出了温度与热负荷的变化关系,用于浓度分段以及加热点的选取。低浓段和高浓段的划分,简化了设计过程,对高浓段强调降低用能品位,对低浓段给出了热量集成的设计方法。等价T-Q图可简化计算,方便负荷分段、集成。最后通过实例对分段设计法进行了说明和验证。
Partitioning design strategies were provided in terms of the distillation separation characters of wideboiling system. The whole separation process from feed to product was divided according to separation concentrations into several subtasks between which heat integration could be realized. A temperature-thermal load （T-Q） curve was built, the reasonable allocation of heat sources with different temperatures was discovered visually, and the operation parameters coincided with design specs were found. Partitioning of Low-Concentration （LC） section and High-Concentration （HC） section simplified the design process. For section HC, the primary work is to reduce the temperature of heat sources, and for the section LC, heat integration is very important. The equivalent T-Q graph is convenient to apply the partition and integration, and easy for calculation. One example was given to explain and validate the partitioning design strategies.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2008年第11期66-68,78,共4页
Chemical Engineering(China)
基金
国防科工委“年产5万吨TDI工程化设计”项目(JZMO313)
关键词
分离过程
分段设计法
蒸发
节能
separation process
partitioning design strategies
evaporation
energy saving
