Wai Cheng

US Patent:

7107194, Sep 12, 2006

Filed:

Oct 27, 2003

Appl. No.:

10/694113

Inventors:

Wai Biu Cheng - Willoughby OH, US

Assignee:

ABB Inc. - Norwalk CT

International Classification:

G06G 7/48
G05B 21/00
B01D 3/42

US Classification:

703 6, 703 22, 203 1, 700270, 700273

Abstract:

A new way of applying the compartmental approach to the simulation of multi-stage separation processes in the process industry leads to more robust simulation models and higher success rate. The new approach makes use of steady-state component balances, constant vapor-liquid equilibrium ratios, and initialization models. Guidelines are provided for creating a computer executable regular model of the multi-stage separation process. Guidelines are also provided for creating a computer executable model that solves the problem of initialization failure of the regular model for the process.