摘要
采用Aspen Plus流程模拟软件,探讨了新型水吸收-精馏工艺过程的丙酮和空气混合的VLA(acetone vapor laden air)丙酮体积分数、温度和吸收剂初始温度等对吸收过程能耗及吸收剂用量的影响,对精馏过程单塔和双塔模型进行了经济分析,并采用夹点技术对吸收精馏流程换热网络进行了设计与优化。结果表明,吸收灵敏性分析的数值模拟结果与工业化装置实际运行数据有高度一致性,最大偏差不超过3. 16%,VLA进料冷却温度、吸收剂冷却温度以及VLA中丙酮体积分数对系统能耗的影响较大。在此基础上研究发现精馏过程的单塔模型相比双塔模型更具优势。基于夹点技术研究优化系统换热网络发现较大节能空间,可以节约公用工程冷量68%。
Aspen plus process simulation software is utilized to study the effect of the volume concentration of acetone in the acetone vapor laden air(VLA) gas,temperature,the initial temperature of the absorbent and the temperature after cooling on the energy consumption and the amount of absorbent in the new water absorption-distillation process.Economic analysis is performed on the single-tower and twin-tower models for the distillation process. Pinch technology is used to design and optimize the heat exchange network of the water absorption-distillation process. It is shown that the numerical simulation results of absorption sensitivity analysis are high consistent with the operation data in the industrialized unit,with the maximum deviation less than 3. 16%. The cooling temperature of VAL feeds and absorbent,and the acetone concentration in VLA gas have a great influence on the energy consumption of the system.On the basis,it is found from the study that single tower model is more advantageous than the double tower model for the absorption-distillation process.Heat exchange network in the system is optimized by pinch technology,which can save68% of cooling capacity in public works.
作者
王军
邓钢
高前进
黄毅松
廉磊
张涛
WANG Jun;DENG Gang;GAO Qian-jin;HUANG Yi-song;LIAN Lei;ZHANG Tao(Zhuhai Cellulose Fibers Company Limited,Zhuhai 519050,China)
出处
《现代化工》
CAS
CSCD
北大核心
2018年第12期208-212,共5页
Modern Chemical Industry
基金
国家绿色制造系统集成项目(Z13506009002)
关键词
溶剂回收
丙酮空气混合气
吸收
精馏
夹点技术
优化
solvent recovery
acetone vapor laden air
absorption
distillation
pinch technology
optimization
