OPERATION OF DIVIDED WALL COLUMN WITH VAPOR SIDEDRAW USING PROFILE POSITION CONTROL

Abstract Divided wall column is a promising energy-alternative for separation process which is capable of achieving typically 30% energy and capital cost savings compared with a conventional distillation system. Despite such advantages, divided wall column (DWC) is not widely used from the fear to run into controllability problems due to the DWC complexity. A profile position control scheme was proposed to overcome the control problems. Relative gain array analysis and singular value decomposition were used to determine optimal control configuration. Dynamic simulation showed that the profile position–product composition cascade control can keep the product purities at the desired values in the face of feed and internal disturbances.

[1]  Dale F. Rudd,et al.  Parametric studies in industrial distillation: Part III. Design methods and their evaluation , 1978 .

[2]  Sigurd Skogestad,et al.  Minimum Energy Consumption in Multicomponent Distillation. 2. Three-Product Petlyuk Arrangements , 2003 .

[3]  Michel Perrier,et al.  Study of the divided wall column controllability: influence of design and operation , 2000 .

[4]  Dale F. Rudd,et al.  Parametric studies in industrial distillation: Part I. Design comparisons , 1978 .

[5]  Michel Perrier,et al.  Analysis of different control possibilities for the divided wall column: feedback diagonal and dynamic matrix control , 2001 .

[6]  Sigurd Skogestad,et al.  Optimal operation of Petlyuk distillation: Steady-state behavior , 2001 .

[7]  Hartmut Schoenmakers,et al.  Model predictive control of integrated unit operations: Control of a divided wall column , 2004 .

[8]  Robin Smith,et al.  Operation and Control of Dividing Wall Distillation Columns: Part 1: Degrees of Freedom and Dynamic Simulation , 1998 .

[9]  Dale F. Rudd,et al.  Parametric studies in industrial distillation: Part II. Heuristic optimization , 1978 .

[10]  Sunwon Park,et al.  Startup of distillation columns using profile position control based on a nonlinear wave model , 1999 .

[11]  Sigurd Skogestad,et al.  Minimum Energy Consumption in Multicomponent Distillation. 3. More Than Three Products and Generalized Petlyuk Arrangements , 2003 .

[12]  Sigurd Skogestad,et al.  Shortcut Analysis of Optimal Operation of Petlyuk Distillation , 2004 .

[13]  Luis Puigjaner,et al.  Control and optimization of the divided wall column , 1999 .

[14]  Robin Smith,et al.  Operation and Control of Dividing Wall Distillation Columns: Part 2: Simulation and Pilot Plant Studies Using Temperature Control , 1998 .

[15]  Sigurd Skogestad,et al.  Optimal operation of Petlyuk distillation: steady-state behavior , 1999 .

[16]  B. Linnhoff,et al.  The design of separators in the context of overall processes , 1988 .

[17]  David Shan-Hill Wong,et al.  Controllability and energy efficiency of a high-purity divided wall column , 2007 .