(3c) Refrigeration Compressor Recycle Quench Control
AIChE Spring Meeting and Global Congress on Process Safety
2015
2015 AIChE Spring Meeting and 11th Global Congress on Process Safety
The 27th Ethylene Producers’ Conference
Reliability and Operability of Rotating Equipment in Ethylene Plants
Monday, April 27, 2015 - 11:00am to 11:25am
Many olefins plant refrigeration compressors use a spray quench of liquid refrigerant to cool the hot recycle gas stream. Typically, the recycle flow is managed by an anti-surge control system while the recycle cooling is managed by the DCS. The interactions of these two control systems can lead to flow swings at the compressor inlet and side streams.
A coordinated control of both the vapor recycle and liquid recycle flows will ensure the proper amount of cooling is applied without excessive liquid flow that could lead to suction drum level problems. The vapor-liquid equilibrium properties of the refrigerant are used to calculate the split between vapor recycle and liquid recycle to maintain stable recycle flow and proper cooling. A dynamic simulation is used to show the conventional control solution and the coordinated control solution.
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2015 AIChE Spring Meeting and 11th Global Congress on Process Safety
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| AIChE Undergraduate Student Members | Free |
| AIChE Explorer Members | $225.00 |
| Non-Members | $225.00 |
The 27th Ethylene Producers’ Conference only
| AIChE Pro Members | $100.00 |
| Fuels and Petrochemicals Division Members | Free |
| AIChE Graduate Student Members | Free |
| AIChE Undergraduate Student Members | Free |
| AIChE Explorer Members | $150.00 |
| Non-Members | $150.00 |