Tray Column Design: downcomer velocity low
Distillation and absorption tray column design parameters — sieve, valve, bubble cap, dual-flow, baffle, and chimney tray geometry, hydraulics, flood limits, and turndown ratios; plus system derating factors, downcomer hydraulics, downcomer residence times, typical theoretical stages by separation system, and Murphree tray efficiency ranges
| tray type | category | downcomer cl velocity ft s max (ft/s) | downcomer cl velocity ft s min (ft/s) | foaming tendency | system service | tray spacing in (in) |
|---|---|---|---|---|---|---|
| downcomer velocity low | downcomer clear liquid velocity | 0.5 | 0.4 | low | Low-pressure (<100 psia) light hydrocarbons; stabilizers; air-water simulators | 18 |
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