G - Physics – 05 – B
Patent
G - Physics
05
B
341/110
G05B 15/02 (2006.01) B01J 19/00 (2006.01) G05D 21/02 (2006.01)
Patent
CA 1200878
ABSTRACT OF THE DISCLOSURE An installation for the production of chemical substances is sub-divided into control regions which are controlled in a decentralized manner and in which a closed divisional function is carried out independently in each case. The working condition of a control region is determined by operating types which may be initially given and by a limited number of discrete operating values. The process parameters determining the control region condition are allocated to each operating value in one formulation. These parameters are adjusted by means of suitable devices. In the event of deviations of a parameter, the other formulation parameters are not adapted, but the procedure is interrupted if the permissible parameter limits are exceeded. Increases in the operating values are only permissible from a quasi-stationary working condition which is characterized by a normal signal formed from the process measurement values. In several control regions, the necessary flexibility is secured by a flow decoupling by means of buffers. Similar control regions are combined into groups, and different groups are combined into main groups. Groups and main groups are controlled together and are decoupled from one another by strategic buffers. Le A 21 764-US/CA
435548
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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