Storage of light naphtha, loading issues
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The initial boiling point of the reformed distillate oil is around 30, while the final boiling point is around 70. It needs to be stored in a tank area before being loaded onto vehicles for use as feedstock in ethylene cracking processes. Can it be stored in external floating roof naphtha tanks? How can safety and loss issues be addressed? I would appreciate advice from experts.
This is generally stored in pressurized spherical tanks! It’s specified in the design codes for petrochemical storage and transportation tank areas!
Pulling oil cannot be stored in atmospheric-pressure tanks (spherical tanks or low-pressure vertical tanks are generally used); if an external floating roof tank is used for storing this oil, the floating roof may cause oil to spill.
Our light naphtha is stored in spherical tanks
During storage, an internal floating roof combined with a nitrogen seal is used to prevent volatilization due to high temperatures in summer. During the loading phase, a closed-loading system is used to recover light hydrocarbons.
As the people mentioned above said, it is better to use header oil or spherical tank storage; if such conditions are not available, try to use an internal floating roof with nitrogen sealing instead. One final reminder: for internal floating roofs, it is best to use a steel float panel with dual sealing! It seems to be Sinopec’s new standard.
Is loading the same as with liquefied gas? What kind of seals do your light naphtha pumps use, and what is the flushing method for those seals?
Stored in spherical tanks and transported by pressurized vehicles; conventional oil tanks incur very high losses.
During storage, an internal floating roof combined with a nitrogen seal is used to prevent volatilization due to high temperatures in summer. During the loading phase, a closed-loading system is used to recover light hydrocarbons; the specific recovery process can be discussed in more detail at qq2453597459
I recommend using spherical tanks for storage; both refineries where I work use spherical tanks for this purpose.
The initial boiling point is low, and high summer temperatures lead to significant volatilization losses; it is recommended to store the substance under pressure, preferably using a floating roof tank with nitrogen sealing or a pressure-rated storage tank. If possible, oil and gas recovery can be carried out.
Internal floating roofs are not safe, and nitrogen sealing cannot solve the problem of volatilization!