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Control structures for disturbance rejection and decoupling of distillation
Author(s) -
Häggblom Kurt E.,
Waller Kurt V.
Publication year - 1990
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690360717
Subject(s) - decoupling (probability) , control theory (sociology) , distillation , fractionating column , process control , feed forward , process (computing) , volumetric flow rate , computer science , mathematics , control engineering , control (management) , chemistry , engineering , mechanics , physics , chromatography , artificial intelligence , operating system
The process gains for different distillation control structures can be calculated through transformations from known gains of one arbitrary structure. In this paper the transformation is utilized for calculation of a two‐point distillation control structure which, in the steady state, simultaneously rejects disturbances in the feed composition and in the feed flow rate and results in implicit decoupling between the two product control loops. This disturbance rejecting and decoupling (DRD) structure is tested on a model of a 15‐plate pilot‐plant distillation column. It compares favorably with standard structures for dual composition control. Experimental results agree with the simulation results.