How to detect leaks in a turbine vacuum system
Thread Content
Dear marine friends, how can we detect leaks in a turbine vacuum system? What are the most effective methods – candles, soap bubbles? . . . .
Leak detection in the turbine vacuum system can be carried out after the system is put into operation, using methods such as lit candles, lit incense sticks, lit cigarettes, or by spraying soapy water or dishwashing solution.
Before starting up, the safety valve of the reboiler is isolated from the system by installing a blind flange, the outlet valve of the external water pump is closed, and 3 to 4 kilograms of nitrogen is introduced into the reboiler system to ensure airtightness. After starting up, it is difficult to locate leaks in the turbine vacuum system; the only options are: 1. Tighten the flanges of the turbine vacuum system again ； ⒉Use small notes to find the flaws ； (Difficult and time-consuming) ⒊ Apply butter to the flange joint surfaces where liquid cannot be sealed to solve the problem. If the above methods fail and the vacuum level continues to drop, normal production cannot be maintained; in such cases, the machine must be shut down for repair. Last edited by Zhongyuanren on 2009-4-14 08:41]
First, a rough assessment is needed; based on practical production experience, it is possible to estimate the areas most likely to experience leaks. Generally, the flanges, valve packing, seals, etc. are checked first, followed by the pipelines. Mainly through listening, touching, and looking; the smoke method can be used for a more intuitive approach.
A fluorescent agent can be used to detect leaks; if there is a leak, it can be clearly seen under ultraviolet light
Could the brother on the 5th floor explain in more detail? Looking forward to it.
The nitrogen airtightness was ensured before starting up, so there should be no major issues. For both of our turbines, pressure was applied for airtightness testing prior to startup, and the process was completed quickly with good results
Thank you all for your answers; the problem has been solved.
Hello, I would like to ask how to achieve airtightness when using paper strips. Is it difficult to achieve airtightness due to the negative pressure?
Hello, how does one create airtightness using a lit cigarette or fragrant substances? What is the effect if there’s a leak? Could you tell me?
It seems that the smoke is simply allowed to enter the device; presumably its operability isn’t very good, and it’s also prone to external influences. A helium mass spectrometer for leak detection would be better, although I’ve never used one before