Gasoline floating roof storage tanks are equipped with nitrogen sealing; what can be the concentration of oil vapor in the gas emitted by the vent valve?
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Gasoline floating roof storage tanks are equipped with nitrogen sealing; what can be the concentration of oil vapor in the gas emitted by the vent valve?
It’s hard to say; theoretically, the oil and gas levels should be very low. It mainly depends on whether your check valve works properly.
Let’s still take a sample for analysis; there’s no theoretical value for this
The allowable leakage amount specified in the breathing valve standards can be used as a reference
The amount of leakage allowed can be determined, but most of the gas that leaks is nitrogen; what proportion does oil vapor actually account for? . .
With a nitrogen seal added, the concentration of oil and gas in the exhaust gas from the breather valve should be very low...
Is the nitrogen pressure higher than the opening pressure of the breathing valve?
It means there’s no need to consider...
But it has to be taken into consideration; after all, it can’t be left untreated, and it needs to be collected and processed
If nothing else works, one can only try to conduct some tests or examinations...
This can be estimated based on the maximum allowable concentration, which is the saturated vapor pressure of the oil at the temperature of the storage tank; by then controlling the pressure at the top of the tank, it is possible to determine the concentration of the oil.