2 replies to this topic

[LITchamp]

Dear All,

 

I am currently working with upstream oil and gas company who wants to build sand trap/separator which will be placed between Wellhead and choke manifold.

 

Following design data available for sizing:

 

Operating pressure : 9000 PSIG

Operating temp : 60 °C

Max Gas flow rate : 55 MMSCFD with gas mol wt of 20

Sand loading : 2.5 kg/hr

Max pressure drop across vessel : 50 psi 

 

Does anyone has experience in sizing of sand trap/separator ?

Please share.

 

[Liza Admani]

Basically sand traps operate vertically and use gravity, not centrifugal force, to separate sand from the flow. As the flow enters the sand trap, it is radically slowed and the direction changed 90 degrees by the stinger-divert er. This allows the sand to separate from the gas and liquids. Sand falls to the bottom of the trap and is kept there by a system of proprietary baffles. The baffles allow gas and liquids to move up and out while keeping the sand separate. Sand is removed by opening one of the two sand discharge ports during operation; shut-in is not required if one of the sand outs clogs.

 

sand traps in a variety of pressures ranging from 5800# psi to 10,000# psi working pressure. Our most common pressures are 5800# and 10,000# psi but we also offer 7500# psi desanders. Sand traps come in two basic configurations: mounted in an "L" skid, or mounted on a trailer.

An "L" skid allows for horizontal transport of the sand trap, then it can be stood up on the lower portion of the skid to operate vertically (all gravity sand traps operate vertically).

 

The sizing is maybe 2" in/out but some models, most notably our 10K sand traps, use 3" in/out. Connections are available for all pressures in 1502 or RF flanged. The 5800# psi sand traps typically come in either 2" or 3" 1502 but can be ordered flanged as well. The 3" in/out 1502 connections offer greater thoughput and hence are called "High-flow" units. 10K sand traps come with 3" 1502 in/outs and 2" sand discharge and drain connections standard but ring type joint (RTJ) flanges can be used instead.

 

i hope this information is helpful to you as i take this information from one of the best instructor from OMESOL you can also visit that site to take more info www.omesol.com

[LITchamp]

Thanks Liza