Could it be that the liquid ammonia was entering the unit with bubbles of gas that caused the flowmeter to incorrectly measure zero flow and, in turn, cause the reactor to scram? Cooling the liquid ammonia feed reinforces this hypothesis because it reduced the number of scrams.
A flowmeter needs to be installed within a 10 diameter straight run. How much of the straight run should be located upstream/downstream of the flowmeter?
Sierra’s new principle of operation video shows how the physics of thermal dispersion technology allow for accurate and reliable direct mass flow measurement.
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Many problems can be solved using basics—and many basics are comprised of relevant knowledge and the skill to use it. Knowing instrumentation, how to use plant measurements, and having the ability to understand Process and Instrumentation Drawings (P&ID), loop drawings, heat and material balances, operating procedures, safety procedures, hazard reviews, pump curves, etc.
As we turn the calendar from 2013 to 2014, it's informative to look back at the past year on FlowControlNetwork.com to discover the articles that resonated most with you, our visitors.