5 replies to this topic

[imtinan mohsin]

What is the technically best way to fill butuene-1 sphere?
should it be filled from top or bottom?

[Art Montemayor]

Imtinam:

Do you mean BUTENE (a.k.a., Butylene) or do you mean Butuene (related to the aromatic compound, Toluene)?

Do you mean filling at the very outset (startup)? Or do you mean normal filling - after the sphere has a working inventory?

If you mean Butene, then filling the tank under any conditions is recommended as being at the bottom of the tank. This can be done directly through a nozzle at the bottom, or a dip pipe from the top of the sphere. You always want to avoid violent splashing and free-fall of the liquid in order to avoid any build-up of static electrical charges.

[Qalander (Chem)]

Imtinan, Probably you are talking about single double bond C4;then Art.'s reply is very pertinent and accurate for dip pipe.

[imtinan mohsin]

Thanks ART,
I mean Butene-1.
I am designing a new Butene-1 Sphere having capacity 8000 m3.
I have to select the filling option either it should be from top or bottom?
[b]My concern is that filling from the bottom will not creat back pressure on the feeding system?[/b]
An already installed Butene-1 sphere (Capacity = 2500 m3) has filling from the top.

[Qalander (Chem)]

Dear Imtinan,
Somehow Your query indicates;
As if(probably ), You have

either not studied the internals/pipings drawings/design critically

or have not seen these pipings/Nozzles positions (physically)
inside the existing spheres

Kindly be informed that for most LPG/butane etc. storage vessels,spheres

most frequently the Rundown or Filling in Pipelines usually enter from top and are dipped pipes i.e. extended almost right upto the bottom.

Hope this clarifies, what Art. explained early on to you.

[djack77494]

I've seen in pressurized anhydrous ammonia storage bullets that the fill line enters the vessel at the bottom but that internally there is piping that brings the incoming ammonia up to near the top of the vessel. When I asked about that, I was told that it is to bring the overall tank closer to equilibrium. Sitting in the sunlight, the vapors at the top of the vessel can get rather warm, while the liquid lower down is closer to a constant temperature. "Spraying" incoming liquid into the vapor space helps bring the vessel closer to thermal equilibrium. (However, this must not be terribly important since it only happens during a fill operation.) I'd assume butene-1 would exhibit similar behavior.