Expanders for Oil and Gas Operations by Murari Singh Michael J. Drosjack & David H. Linden

Author:Murari Singh, Michael J. Drosjack & David H. Linden
Language: eng
Format: epub
Publisher: McGraw-Hill Education LLC
Published: 2014-05-14T16:00:00+00:00

5.7 Expander Online Cleaning

Online cleaning has become commonplace in virtually all CCU expander installations. Flow-path deposition is the most common operational problem with today’s expanders. Two online cleaning procedures are commonly used: abrasive cleaning and thermal cleaning.

5.7.1 Abrasive Cleaning

Abrasive cleaning involves the injection of an abrasive into the flue-gas line just upstream of the expander. The abrasive removes the flow-path deposits by impacting the surfaces of the flow path. The abrasive cleaning is done frequently (from once per week to as frequent as once per shift). It is used to remove light catalyst deposits from the flow path and will not remove the heavier more tightly adhered deposits. Abrasive cleaning is a preventative maintenance procedure that is used to prevent significant accumulations of catalyst.

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