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hexane water separator system

hexane water separator system

hexane water separator system

(OP)
Hi
i am looking at a small vessel(A)  design for hexane as liquid( capacity 30 litres).vessel A is connected to another vessel B operating at atmospheric pressure. Vessel A has a vent line running via a condensor. lastly it has another nozzle for pumping the hexane via a pump.
capacity of vessel 40 litres. Curently no relief valves or  Bursting discs have been considered.

does vessel A need to be pressure rated?

RE: hexane water separator system

You need to look at modes of failure that could send hexane and other fluids to vessel A.  Then look at what capacity the line between vessels A and B can be transfered and not allow the pressure in vessel A to go above 15 psig.  You'll also have to calculate the pressure drop of the fluids exiting vessel B and take that into account also.

RE: hexane water separator system

(OP)

Is 15psig a  standard condition for a pressure vessel? What do you mean by ‘ what capacity the line between vessels A and B can be transfered ‘

Precautions taken to ensure Vessel A is not pressurised:
1)    Level control which will switch on a pump and pump out hexane into another storage tank.
2)    Any build up of hexane vapour flows up through a vent line sitting directly on top of the vessel. There is also another vent pipe on vessel B  ( this will ensure any vapour build up is sent to the condenser.)
3)    Vessel A is expected to take at least more than a month to fill up.
4)    Vertical sight glass on both vessels will provide liquid height.
Vessel B has two exit points. One allows water to drain out by gravity. This same system ensures that vessel B never achieves liquid above a certain height.  The second exits into  vessel A such that there is a connecting line between A and B to allow hexane to OVERFLOW into vessel A. Therefore this line is level.  And has a NRV on it


Do these steps sound enough….

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