ignoring booster pump 4

[afsaneheng]

Dear all hello

for transferring crude oil with reciprocating (plunger) pump because of NPSH we shall use booster pump.
can any body introduce me a technical suggestion with reference or standard for how to ignore using booster pump?

the process procedure is: drum for separating gas from liquid----->booster pump----->reciprocating pump


TKS

 

[LittleInch]

Having enough NPSH.

For a separator this often means a can pump, elevating the separator and putting the pump on the ground or digging a pit.

A reciprocating pump often has a low NPSH.

Few (no ) details so no real answer...

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[afsaneheng]

Dear littleInch

Thank you for your answer.
In fact i saw some example of industrial process plane
Where in it before reciprocating pump they did not
Use any booster pump and as a solution they play with
Amount of gas which is separated in previous drum,
But I like to know what principle or standard does their
Solution depend on, if any?

 

[LittleInch]

The principle is that the client wants something that works for the lowest amount of money.

Its called design. If you don't need a bolster pump then don't instal one.

I'm not sure I understand your question or issue.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[micalbrch]

Temperature and suction line (length and diameter) is an important object, too. If you compare your actual set up with the ones you saw before, keep that in mind.

 

[afsaneheng]

Dear Micalbrch thank you for your help.
Dear littleInch, yes your opinion is right, but I think if client want sth that is not correct based on existed standard , he shall be informed. Acc. To this I want to know is there any standadreferancreferance which coguid me for how to ignore booster pump before transfer pump.

 

[LittleInch]

If the transfer pump can operate with the NPSHA, then it doesn't need a booster pump. If it can't then you nerd to fit one or somehow raise the NPSHA. There's no magic behind this, simply practical hydraulic design.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[bimr]

A simple hydraulic calculation is what is required. You will not find a standard reference for that.

 

[SNORGY]

You should, if you can, check out The Pump Handbook by Karassik et al. Acceleration head and plunger face separation become problematic in reciprocating pumps as speed is increased, depending to some extent on pump geometry and type (e.g. quintuplex versus triplex). If you are moving fluid with entrained gas, or fluid at or near vapor pressure at the separator, I doubt that you will be able to avoid cavitation in the reciprocating pump without a booster, and ultimately your plungers or crankshaft or both might suffer. You can mitigate this to some extent with suction side pulsation stabilizers, but all you are then doing is increasing the criticality of those devices. It requires attention to keep (for example) gas charged (if used) stabilizers tuned correctly.

I personally wouldn't do this with a reciprocating pump without a booster, and I usually also try to achieve 140 kPa above vapor pressure at the reciprocating pump suction nozzle, but that's just me, and it is a situational thing.

 

[afsaneheng]

Dear bimr thank you for your help.
Dear SNORGY I really appreciate you for your perfect answer.