Reconciliation in a Section of an Olefin Plant

The hydrogenated gaseous stream enters the cold section, where it is passed through a number of heat exchangers and separators. A portion of the liquid stream from unit 10 is used as the recycle stream. Hydrogen is separated as a gaseous stream in unit 12. 

The liquid streams from separators 7-11 enter the demethanizer column (unit 13). The top product of this column is methane, which is sent to the fuel gas stream via the cold section and drying/precooling section. 

The bottom product of the demethanizer column enters the C2 splitter column (unit 15) as a feed. The top product of this column is cooled and compressed and subsequently stored as ethylene product. The bottom product of the C2 splitter column is 

Three different cases were considered in this example  

A small subsection of the whole system (consisting of units 1 to 6) to show stage-by-stage calculations 

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DECOMPOSITION/RECONCILIATION IN A SECTION OF AN OLEFIN PLANT 12.2.1. Process Description... 

The first case study consists of a section of an olefin plant located at the Orica Botany Site in Sydney, Australia. In this example, all the theoretical results discussed in Chapters 4,5,6, and 7 for linear systems are fully exploited for variable classification, system decomposition, and data reconciliation, as well as gross error detection and identification. 

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