How to reduce vibrations in throttling expansion
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In our workshop, when diluting liquid ammonia, severe vibrations occur along with loud noises. The liquid ammonia being diluted is at -10 degrees Celsius and under a pressure of 10 kilograms; the pipes used for this dilution are D32 stainless steel straight pipes. It is possible that the vibration is caused by throttling expansion, or it could be due to the heat released as the liquid ammonia dissolves. The exact cause is not clear, so I would appreciate any advice from everyone – please help me find a solution!
What the poster means is vibration in the liquid ammonia pipeline, I guess. When producing ammonia solution, liquid ammonia is added to water or dilute ammonia solution; under normal circumstances the liquid ammonia pipeline should not vibrate, unless water gets into it； Alternatively, if the valves at both ends of the liquid ammonia pipeline are closed, the pipeline will contain liquid ammonia, which will evaporate at a certain temperature, thereby causing vibrations ； Or the liquid ammonia pipeline is used intermittently, resulting in a large amount of ammonia vaporizing inside the pipe; shock waves occur during transportation. Last edited by bluetop on 2008-1-23 20:17.]