A Dynamic Modeling For Cyclic Total Reflux Batch Distillation

Abstract

Abstract: Cyclic total reflux (CTR) batch distillation is a promising mode of the process but lacking of appropriate modeling for the period of filling the reflux drum.A new dynamic modeling method for the simulation of CTR batch distillation is proposed in this work,in which the changes in column holdup and liquid flow rate during the filling of the drum,and the consequent change in valid number of theoretical plates are considered.The effect of drum holdup on operation time is investigated and the optimal drum holdup is obtained from the simulation.The dynamic modeling is compared to the conventional modeling without consideration of change in liquid flow rate. The experimental result shows that the present modeling is more reliable and more accurate,especially for the column with large liquid holdup.

Key words: batch distillation, cyclic total reflux, dynamic modeling, liquid holdup, reflux drum

摘要： Cyclic total reflux (CTR) batch distillation is a promising mode of the process but lacking of appropriate modeling for the period of filling the reflux drum.A new dynamic modeling method for the simulation of CTR batch distillation is proposed in this work,in which the changes in column holdup and liquid flow rate during the filling of the drum,and the consequent change in valid number of theoretical plates are considered.The effect of drum holdup on operation time is investigated and the optimal drum holdup is obtained from the simulation.The dynamic modeling is compared to the conventional modeling without consideration of change in liquid flow rate. The experimental result shows that the present modeling is more reliable and more accurate,especially for the column with large liquid holdup.

关键词: batch distillation, cyclic total reflux, dynamic modeling, liquid holdup, reflux drum

BAI Peng, SONG Shuang, SHENG Min, LI Xiaofeng. A Dynamic Modeling For Cyclic Total Reflux Batch Distillation[J]. , 2010, 18(4): 554-561.

白鹏, 宋爽, 盛敏, 李晓峰. A Dynamic Modeling For Cyclic Total Reflux Batch Distillation[J]. , 2010, 18(4): 554-561.

References

1 Diwekar,U .M.,Madhavan,K.P.,“Multicomponent batch distillation column design”,Ind.Eng.Chem.Res.,30,713-718 (1991).
2 Sundaram,S.,Evans,L. B.,“Shortcut procedure for simulating batch distillation operations”,Ind.Eng.Chem.Res.,32,511-519(1993).
3 Barolo,M.,Guarise,G. B.,“Maximum fractionation by distillation of systems with constant relative volatilities”,Ind.Eng.Chem.Res.,33,139^-143 (1994).
4 Al-Tuwain,M.S.,Luyben,W.L.,“Multicomponent batch distillation short-cut design of batch distillation columns”,Ind.Eng.Chem.Res.,30,507-516 (1991).
5 Alejski,K.,Dupart,F.,“Dynamic simulation of the multicomponent reactive distillation”,Chem.Eng.Sci.,51(18),4237-4253 (1996).
6 Schneider,R.,Noeres,L.,Gorak,A.,“Dynamic modeling and simulation of reactive batch distillation”,Comput.Chem.Eng..,25,169^-176(2001). 7 Gruetzmann,S.,Fieg,G.,“Startup operation of middle-vessel batch distillation column:modeling and simulation”,Ind.Eng.Chem.Res.,47 (3),813-824(2008).
8 Gruetzmann,S.,Fieg,G.,Skogestad,S.,“Experimental and theo-retical studies on the start-up operation of a multivessel batch distil-lation column”,Ind.Eng.Chem.Res.,48 (11),5336-5343 (2009).
9 Barb,D.K.,Holland,C.H.,“Batch distillation”,In:Proceedings of the 7th World Petroleum Congress,Russia(1967).
10 Bai,P.,Li,X.F.,Sheng,M.,Song,S.,“Study of dual temperature control method on cyclic total reflux batch distillation”,Chem.Eng. Process.,46(8),769-772(2006).
11 Gonzalez-Valasco,J.R.,Gutierrez-Qrtiz,M.A.,Castresana-Pelayo,J.R.,“Improvements in batch distillation Startup”,Ind.Eng.Chem. Res.,26(4),745(1987).
12 Nowicki,L.,Gorak,A.,“Methode zur.simulation der periodischen rektifikation mit vollstandigem rücklauf”,Chemie-Ingenieur-Technik,60(7),555-557 (1988).(in German)
13 S?rensen,E.,“A cyclic operating policy for batch distillation—theory and practice”,Comput.Chem.Eng.,23,533-542(1999).
14 S?rensen,E.,Skogestad,S.,“Optimal operating policies of batch distillation with emphasis on the cyclic operating policy”,In:Proceedings of Proc.Sys.Eng.(PSE),Kyongju,Korea,449 (1994).
15 S?rensen,E,Skogestad,S.,“Comparisons of regular and inverted batch distillation”,Chem.Eng.Sci.,51 (22),4949 (1996).
16 S?rensen,E.,Prenzler,M.,“A cyclic operating policy for batch dis-tillation—theory and practice”,Comput.Chem.Eng.,21,1215 (1997).
17 Bai,P.,Hua,C.,Li,X. G.,Yu,K. T.,“Cyclic total reflux batch distil-lation with two reflux drums”,Chem.Eng.Sci.,60(21),5845-5851(2005).
18 Gmehling,J.,Jiding,L.,Martin,S. A.,“Modified UNFIAC model:present parameter matrix and results for different thermodynamicproperties”,Ind Eng.Chem.Res.,32 (1),178-193 (1993).

[1]	Borui Liu, Tao Zhang, Yi Zheng, Kailong Li, Hui Pan, Hao Ling. A dynamic control structure of liquid-only transfer stream distillation column [J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 135-145.
[2]	Li Sun, Jierong Liang. Thermodynamic modeling of gas solubility in aqueous sodium chloride solution [J]. Chinese Journal of Chemical Engineering, 2021, 38(10): 184-195.
[3]	Alireza Afsharpour, Ali Haghtalab. Implementation of electrolyte CPA EoS to model solubility of CO₂ and CO₂ + H₂S mixtures in aqueous MDEA solutions [J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1912-1920.
[4]	Yubin Wang, Jun Li, Yang Jin, Ming Chen, Yan Cao, Jianhong Luo. Visual study on the characteristics of liquid and droplet in a novel rotor-stator reactor [J]. Chinese Journal of Chemical Engineering, 2019, 27(11): 2643-2652.
[5]	Minyan Zhu, Yafei Hou, Na Yu, Mengqi Chen, Zhanhua Ma, Lanyi Sun. Design and control of a middle-vessel batch distillation for separating DMC-EMC-DEC mixture [J]. Chin.J.Chem.Eng., 2018, 26(9): 1837-1844.
[6]	Congli Mei, Yong Su, Guohai Liu, Yuhan Ding, Zhiling Liao. Dynamic soft sensor development based on Gaussian mixture regression for fermentation processes [J]. , 2017, 25(1): 116-122.
[7]	Qiangda Yang, Hongbo Gao, Weijun Zhang, Huimin Li. Simultaneous hybrid modeling of a nosiheptide fermentation process using particle swarm optimization [J]. Chin.J.Chem.Eng., 2016, 24(11): 1631-1639.
[8]	Lusheng Zhai, Ningde Jin, Zhongke Gao, Zhenya Wang. Liquid holdup measurement with double helix capacitance sensor in horizontal oil-water two-phase flow pipes [J]. Chin.J.Chem.Eng., 2015, 23(1): 268-275.
[9]	TANG Ke, BAI Peng, LI Guangzhong . Total Reflux Operation of Multivessel Batch Distillation for Separation of Binary Mixtures [J]. Chin.J.Chem.Eng., 2014, 22(6): 622-627.
[10]	JIANG Zhankun, BAI Peng. Overhead Concentration Platform of Total Withdrawal Operation in Cyclic Total Reflux Batch Distillation [J]. , 2011, 19(4): 598-602.
[11]	Ricardo Morales-Rodriguez, Krist V. Gernaey, Anne S. Meyer, Gürkan Sin. A Mathematical Model for Simultaneous Saccharification and Co-fermentation (SSCF) of C6 and C5 Sugars [J]. Chin.J.Chem.Eng., 2011, 19(2): 185-191.
[12]	S. M. Khazraee, A. H. Jahanmiri. Composition Estimation of Reactive Batch Distillation by Using Adaptive Neuro-Fuzzy Inference System [J]. , 2010, 18(4): 703-710.
[13]	FANG Jing, LI Chunli, WANG Honghai, SUN Lijun. A Quasi-steady-state Model for Numerical Simulation of Batch Extractive Distillation [J]. , 2010, 18(1): 43-47.
[14]	HUAChao,LIXingang,XUShimin, BAIPeng. Design and operation of batch extractive distillation with two reboilers [J]. , 2007, 15(2): 286-290.
[15]	ZHANGXuemei, HEJie,ZHANGWeijiang,ZHANGZhigang,JIANChungui, YANGZhicai. The Operation of Draining Column Holdup for Slop Cut Withdrawal in Batch Distillation [J]. , 2006, 14(3): 337-342.