The energy saving effects of complex heat-integrated distillation configurations

The distillation of a ternary BTX mixture was studied to evaluate three potential energy saving methods: optimal configuration strucluring, heat integration and heat pumping. Ten heuristics, in two categories, were induced and arranged in order of priority.Separation-technique heuristics: (1) Favor heat flux exchange between units by direct stream contact (thermal coupling). (2) Favor separations with initial splits between extremes in volatility (prefractionation). (3) Favor heat integration if flexibility and operability are satisfactory. (4) Favor operation under lower pressures if the cost involved is reasonable. (5) Favor heat pumping with a product stream as the working medium.Separation-system heuristics: (1) Favor the PET configuration. (2) Favor the PF configuration if various feeds are anticipated. (3) Favor the SS configuration for very low concentrations of the most or least volatile components. (4) Favor the R heat integration form. (5) Favor the OHP heat pumping form.

[1]  J. D. Seader,et al.  Separation sequence synthesis by a predictor based ordered search , 1976 .

[2]  Gary J. Powers,et al.  Synthesis of distillation systems with energy integration , 1974 .

[3]  William L. Luyben,et al.  Heat-integrated distillation columns for ternary separations , 1985 .

[4]  Arthur W. Westerberg,et al.  A Simple Synthesis Method Based on Utility Bounding for Heat‐Integrated Distillation Sequences , 1985 .

[5]  T. Umeda,et al.  A thermodynamic approach to the synthesis of heat integration systems in chemical processes , 1979 .

[6]  Bodo Linnhoff,et al.  Understanding heat exchanger networks , 1979 .

[7]  E. G. Hohmann,et al.  A NEW APPROACH TO THE SYNTHESIS OF MULTICOMPONENT SEPARATION SCHEMES , 1982 .

[8]  J. D. Seader,et al.  Synthesis of separation sequences by ordered branch search , 1975 .

[9]  Arthur W. Westerberg,et al.  A combined heuristic and evolutionary strategy for synthesis of simple separation sequences , 1977 .

[10]  Arthur W. Westerberg,et al.  A review of process synthesis , 1981 .

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

[12]  George Stephanopoulos,et al.  Studies in process synthesis—I: Branch and bound strategy with list techniques for the synthesis of separation schemes , 1975 .

[13]  William L. Luyben,et al.  Alternative distillation configurations for energy conservation in four-component separations , 1983 .

[14]  Yuji Naka,et al.  A thermodynamic approach to multicomponent distillation system synthesis , 1982 .

[15]  Rodolphe L. Motard,et al.  Evolutionary synthesis of separation processes , 1981 .

[16]  Gary J. Powers,et al.  A Forward Branching Scheme for the Synthesis of Energy Recovery Systems , 1975 .

[17]  F. Petlyuk.  Thermodynamically Optimal Method for Separating Multicomponent Mixtures , 1965 .

[18]  Arthur W. Westerberg,et al.  Studies in process synthesis—II: Evolutionary synthesis of optimal process flowsheets☆ , 1976 .

[19]  Christopher L.E. Swartz,et al.  A collocation approach to distillation column design , 1986 .

[20]  B. Linnhoff,et al.  The pinch design method for heat exchanger networks , 1983 .

[21]  William L. Luyben,et al.  Economics of Alternative Distillation Configurations for the Separation of Ternary Mixtures , 1978 .

[22]  William L. Luyben,et al.  Alternative distillation configurations for separating ternary mixtures with small concentrations of intermediate in the feed , 1985 .

[23]  B. Linnhoff,et al.  Heat integration of distillation columns into overall processes , 1983 .

[24]  Michael F. Malone,et al.  New complex column arrangements for ideal distillation , 1986 .

[25]  Roger W. Thompson,et al.  Systematic synthesis of separation schemes , 1972 .