化工进展 ›› 2015, Vol. 34 ›› Issue (04): 1165-1170.DOI: 10.16085/j.issn.1000-6613.2015.04.046

• 应用技术 • 上一篇    下一篇

超重力精馏回收果胶沉淀溶剂的应用

宋子彬1,2, 栗秀萍1,2, 刘有智1,2, 李道明1,2, 李宁1,2   

  1. 1. 中北大学山西省超重力化工工程技术研究中心, 山西 太原 030051;
    2. 超重力化工过程山西省重点实验室, 山西 太原 030051
  • 收稿日期:2014-10-08 修回日期:2014-11-05 出版日期:2015-04-05 发布日期:2015-04-05
  • 通讯作者: 栗秀萍,教授,硕士生导师,研究方向为超重力精馏化工过程强化技术.E-mail lxpzhongxin@126.com.
  • 作者简介:宋子彬(1990—),女,硕士研究生
  • 基金资助:
    国家自然科学基金(21376229)及山西省科技攻关计划(工业)(20130321035-02)项目.

Application of higee distillation for pectin precipitation solvent recovery

SONG Zibin1,2, LI Xiuping1,2, LIU Youzhi1,2, LI Daoming1,2, LI Ning1,2   

  1. 1. Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan 030051, Shanxi, China;
    2. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, Taiyuan 030051, Shanxi, China
  • Received:2014-10-08 Revised:2014-11-05 Online:2015-04-05 Published:2015-04-05

摘要: 同时应用超重力精馏连续与间歇操作分离回收果胶沉淀溶剂中的乙醇,并以不锈钢波纹丝网为填料,在原料乙醇质量分数xf=55%、回流比R=4、超重力因子β=63.16~252.67、原料流量F=15~50L/h、1.01×105Pa和室温进料下操作,研究了四级超重机在连续精馏过程中的传质性能;并在β=161.71、R=2.5~7及1.01×105Pa操作条件下,考察了间歇精馏过程中不同回流比R对塔顶和塔底乙醇浓度xdxw的影响.结果表明,在连续精馏过程中,理论塔板数NTβF的增大而增加,设备的等板高度HETP为41.12~58.21mm,xd=93%,xw=35%;在间歇精馏过程中,xd随着R的增大先增高后降低,xw随着Rt的增大而下降,所得产品xd为92.5%,xw为1.05%;乙醇分离回收效果良好,回收率为91.28%,单位回收乙醇产品成本为0.644元/L,充分表现出超重力精馏工艺应用于果胶沉淀溶剂的回收再利用的优势.

关键词: 超重力, 精馏, 乙醇-水, 溶剂回收

Abstract: The continuous and intermittent processes of higee distillation separation were used in recycling ethanol in the solvent of pectin precipitation at the same time. With stainless steel wave thread packing,mass transfer of four-stage higee distillation continuous process was studied,under the conditions of atmospheric pressure and ambient temperature,feedstock mass fraction xf of 55%,reflux ratio R of 4,average high gravity factor β of 63.16—252.67,feedstock flux F of 15—50 L/h. Different operating conditions impacting on the tower top ethanol mass fraction xd and tower bottom ethanol mass fraction xw were also studied in the four-stage higee distillation batch process,under the conditions of atmospheric pressure,R of 2.5—7,β of 161.71. Under the operation of continuous process,the number of theoretical plate NT of four-stage higee distillation equipment increased with increasing β and F; the height equivalent of theoretical plate HETP was 41.12—58.21mm; xd was 93% and xw was 35%. Under the operation of batch process,xd increased first then decreased with increasing R,while xw decrease with R and t; xd is 92.5% and xw is 1.05%. The separation effect of Ethanol recycling is good,and recovery rate was 91.28%. The cost of unit ethanol recovery was 0.644 yuan/L,showing advantage of higee distillation in recycling ethanol in the solvent of pectin precipitation.

Key words: higee, distillation, ethanol-water, solvent recovery

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn