(113b) Fouling early detection in ethylene plant Steam Turbines
AIChE Spring Meeting and Global Congress on Process Safety
2019
2019 Spring Meeting and 15th Global Congress on Process Safety
22nd Topical Conference on Refinery Processing
Process Reliability and Data Analytics II
Tuesday, April 2, 2019 - 2:00pm to 2:30pm
The phenomenon of fouling builds up gradually with operation and represents one of the major issues affecting turbomachinery in charge gas and refrigerant trains. Steam Turbines fouling, in particular, is caused by poor steam purity and typically results in a reduced steam swallowing capacity due to the increase of pressure in machine section at constant steam flow.
To enable an early detection of this phenomenon the variation of the Stodola constant (KST) calculated across machine wheel chamber and exhaust sections is compared with KST resulting from the machine design tool calculation at same steam conditions. The long term monitoring of this parameter can be applied to prevent severe machine damage and to suggest the timing for machine cleaning procedures.
The results of this comparison on a specific use-case will be presented in detail in this paper.
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