Premium
Simulation and design of distillation units for treatment of sulfite pulping condensates to recover methanol and furfural: Part I: Incorporation with an evaporation unit and use of secondary steam
Author(s) -
Zacchi G.,
Aly G.
Publication year - 1979
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450570311
Subject(s) - distillation , evaporation , furfural , fractionating column , chemistry , process engineering , methanol , continuous distillation , condenser (optics) , column (typography) , thermodynamics , chromatography , organic chemistry , engineering , catalysis , mechanical engineering , light source , physics , optics , connection (principal bundle)
A distillation unit was simulated using DESTLA, a computer program for steady‐state calculations of general multi‐component distillation units. Vapor‐liquid and liquid‐liquid equilibria were both computed by EQUIL, a computer program for computation and plotting of such equilibria. The simulations resulted in a distillation unit consisting of three columns. Energy consumed in the first column dominates the operating costs of the unit. The first of the three different alternatives studied for satisfying the energy requirements of the first column is presented. Incorporating the first column into an evaporation unit yields low steam consumption. However, a decrease in evaporation capacity due to the temperature drop in the first column and complex control design are the disadvantages associated with this alternative.