(37a) Large Steam Turbine Overspeed Trip Mitigation in Large Olefins Plans
AIChE Spring Meeting and Global Congress on Process Safety
2017
2017 Spring Meeting and 13th Global Congress on Process Safety
The 29th Ethylene Producers' Conference
Ethylene Plant Rotating Equipment Panel Discussion
Monday, March 27, 2017 - 2:05pm to 2:30pm
Steam turbine overspeed events in large olefins plants can happen from a sudden loss of load in the driven equipment or instantaneous loss of coupled inertia as a result of complete coupling failure. This overspeed event occurs as load is rapidly depleted and steam is still being supplied to the rotor system. The largest contributor to steam turbine overspeed is entrapped steam and this paper will offer suggestions for OEM and Customer collaboration of steam turbine design with special consideration for ancillary components and supporting system parameters. Alternative means of initiating a trip event such as rate of acceleration and rotor-to-rotor angular monitoring will be offered as alternatives to traditional trip set points as a function of rated speed.
In this paper, we will present findings regarding the most important considerations in the design, engineering and implementation of electronic overspeed trip systems, demonstrated through models and first-principles simulation to maximize system responsiveness, reliability, and availability.
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2017 Spring Meeting and 13th Global Congress on Process Safety
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The 29th Ethylene Producers' Conference only
AIChE Pro Members | $100.00 |
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AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |