Issue
Korean Journal of Chemical Engineering,
Vol.35, No.12, 2336-2347, 2018
Design and control of extractive distillation for the separation of methyl acetate-methanol-water
The azeotrope of methyl acetate methanol and water was isolated using extractive distillation with water as entrainer. The pressure-swing extractive distillation (PSED) process and vapor side-stream distillation column (VSDC) with the rectifier process were designed to separate the methyl acetate, methanol and water mixture. It was revealed that the VSDC with the rectifier process had a reduction in energy consumption than the PSED process. Four control schemes of the two process were investigated: Double temperature control scheme (CS1), QR/F feedforward control of reboiler duty scheme for PESD (CS2), QR/F feedback control scheme for VSDC (CS3), the feedback control scheme of sensitive plate temperature of side-drawing distillation column to dominate the compressor shaft speed (CS4). Feed flow and composition disturbance were used to evaluate the dynamic performance. As a result, CS4 is a preferable choice for separation of methyl acetate-methanol-water mixture. A control scheme combining the operating parameters of dynamic equipment with the control indicators of static equipment was proposed in this paper. It means using the sensitive plate temperature of side-drawing column to control the compressor shaft speed. This is a new control scheme for extractive distillation.
[References]
  1. Zheng HD, Xie LD, Cai LY, Wu D, Zhao SY, Chem. Eng. Process., 95, 214, 2015
  2. Jie H, Cui X, Peng Y, Li X, Xu L, Lin R, Huagong Xuebao/CIESC J., 67, 606, 2016
  3. Zhang ZG, Hu AR, Zhang T, Zhang QQ, Sun MY, Sun DZ, Li WX, Fluid Phase Equilib., 401, 1, 2015
  4. Genduso G, Farrokhzad H, Latre Y, Darvishmanesh S, Luis P, Van der Bruggen B, J. Membr. Sci., 482, 128, 2015
  5. Lux S, Winkler T, Forstinger M, Friesenbichler S, Siebenhofer M, Sep. Sci. Technol., 50(18), 2920, 2015
  6. Aniya V, De D, Satyavathi B, Ind. Eng. Chem. Res., 55(25), 6982, 2016
  7. Hosgor E, Kucuk T, Oksal IN, Kaymak DB, Comput. Chem. Eng., 67, 166, 2014
  8. Gao X, Zhu B, Gu Q, Jiang Y, Yang D, Chin. J. Process. Eng., 17(2), 254, 2017
  9. Chen X, Liu C, Geng Z, Chem. Eng. Process., 123, 233, 2017
  10. Luyben WL, Chem. Eng. Process., 107, 29, 2016
  11. Li Lumin, Tu Yangqin, Sun Lanyi, Hou Yafei, Zhu Minyan, Guo Lianjie, Li Qingsong, Tian Yuanyu, Ind. Eng. Chem. Res., 55(32), 8837, 2016
  12. Zhang LH, Liu JB, Li XG, Li H, Jiang B, Xiao XM, Sep. Sci. Technol., 50(1), 148, 2015
  13. Luyben WL, Chem. Eng. Res. Des., 106, 253, 2016
  14. Navarro-Espinosa IR, Cardona CA, Lopez JA, Fluid Phase Equilib., 287(2), 141, 2010
  15. Wang HH, Cui XY, Li CL, Fang J, Chem. Eng. Technol., 36(4), 627, 2013
  16. Luyben WL, John Wiley & Sons, 292 (2013).
  17. Wang HH, Li Y, Su WY, Zhang YZ, Guo JJ, Li CL, Chem. Eng. Technol., 39(12), 2339, 2016
  18. Xia M, Xin YP, Luo JW, Li WS, Shi L, Min Y, Xu CJ, Ind. Eng. Chem. Res., 52(50), 17996, 2013
  19. Li WS, Shi L, Yu BR, Xia M, Luo JW, Shi HC, Xu CJ, Ind. Eng. Chem. Res., 52(23), 7836, 2013
  20. Chang WL, Chien IL, Ind. Eng. Chem. Res., 55(43), 11291, 2016
  21. Wang XH, Xie L, Tian P, Tian GZ, Chem. Eng. Process., 110, 172, 2016