The flash point of diesel is getting lower and lower
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Why is the flash point getting lower and lower after steam is introduced into the diesel stripping tower?
Adjust the pressure of the distillation tower; it might be too low.
The stripping tower will vaporize some of the light components, which end up in the acidic gas stream. Once that process is stopped, there will be more light components in the diesel fraction, resulting in a relatively lower flash point.
The components that are stripped off are light components; if the amount of stripping is low, there should be more light components in the diesel, so it’s necessary to make appropriate adjustments
By reducing the steam injection rate, less light components are sent to the top of the tower; as a result, more light components remain at the bottom of the tower, which in turn leads to a higher flash point of the product at the bottom. .
Whenever you take an action, there will inevitably be a consequence.
When the stripping steam is reduced, the vapor pressure of oil and gas in the tower increases, making it more difficult for the light components to volatilize! The purpose of stripping is to separate the light fractions from the components!
First, it is necessary to understand what the flash point is. The flash point is determined by the light components; within the first 10% of the distillation range, as the amount of vaporization decreases, fewer light components are vaporized, and more remain in the tower, resulting in a lower flash point
If you turn off the stripping steam, how can the diesel flash point not be low? If there are too many light components in diesel, it is prone to flash ignition.
Thank you so much! Samples taken every 4 hours: one at 72, one at 68, one at 63 – continuously low values
Shouldn’t light oil with low pressure be easy to volatilize? But I’ve understood a bit now: the gas-liquid separation that occurs right after it enters the tower changes things