There is a problem with flushing plan Plan 52
Thread Content
Why does Plan 52 require that \"the steam pressure of the process fluid is generally higher than the pressure in the sealant tank\"”
What does that mean? Is there pressure in the sealed tank?
What does the second point in the diagram mean?
For example, in the case of carbon tiers 3 and 4, the vapor pressure is greater than one atmosphere; when the main seal leaks, the vapor enters the tank and is then led to a flare for combustion through the permanently open pipelines at the top of the tank
I believe that the ‘process fluid vapor pressure’ mentioned in 52 refers to the saturated vapor pressure of the medium.
I understand that it is necessary to ensure that, even in the event of a slight leak at the end face, the direction of the leakage is controlled so that the pumping medium is not contaminated by the buffer.
I think it should be: taking methanol as an example, its vapor pressure at a certain pressure is higher than the pressure inside the sealed tank. When methanol leaks into a sealed tank, it vaporizes rapidly, causing an overreading of pressure.
If there is pressure in the sealing liquid tank, it becomes PLAN53
Could the teacher send me a diagram like yours? 332882111@QQ.com
The pressure mentioned by Tu should refer to absolute pressure. In some cases, nitrogen is used to keep the liquid level from rising in tank 52 when there is a leak; therefore, in practice, tank 52 may also be under pressure, although this is an inappropriate approach