External heater convection tube vibrates
Thread Content
Hello everyone, my external heat exchanger uses natural circulation. When the gas output is too large, the convection tube between the external heat exchanger drum and the external heat exchanger will vibrate. Is this normal? Does anyone have a similar situation?
Not normal but normal. . . Why do you say that? There is a range for the heat load design of the external heat exchanger (about 30% above and below the design value). No matter which way, the connection between the tube of the external heat exchanger and the steam drum is not a pure single phase. . . So there is a problem of tube vibration caused by phase changes. . . :lol This post was last edited by chengkang on 2009-4-21 16:34 ]
That's right, I think so too. What I'm concerned about now is that frequent fluctuations will cause danger to the device, and it's always possible to shake the welding joint open.
Because of the existence of two-phase flow, vibration of the convection tube bundle is inevitable, but it depends on the degree. As the original poster said, when the steam generation is large, the pipeline vibrates, indicating that it may be overloaded, or even if there is no overload, there is a problem in the pipeline design. To avoid this situation, pay attention to safety.
You should try lowering the load. The load is probably too high.
How much gas do you produce? Recently, we have discussed the possibility of canceling forced circulation by taking in external heat.