4 replies to this topic

[rajiril]

Hi,

 

I am a Process Engineer working on basic engineering of an Off-spec Condensate Storage Tank. The off-spec condensate has a maximum of 12 psia RVP and 150 ppm of H2S. There are no LP flares available in the Storage Tank area. We are proposing to add a degassing drum in another unit which is half way between the Stabiliser and the Storage tank location and has LP flare. The condensate is then pumped to the new storage tank.

 

Is there still a possibility of lighters being transferred to the storage tank from the degassing drum. We are proposing a internal floating roof tank as the condensate is stabilised the gas in the degassing vessel. Is there a possibility of still lighters and H2S entering the tank and if this is possible, is there a way to scrub the H2S from the tank vent stream before discharging to atmpsphere.

[fallah]

rajiril,

 

Please upload a simple sketch of the system you described...

[shahid780812]

True vapor pressure of condensate shall not exceed 13 psia, if floating roof tank is selected.
Further, a boot upstream of tank shall help to release the entrained vapors and h2s. Refer blog from Mr. Ankur regarding the boot sizing.
If flare is not available in storage area, you may vent the gas laden with h2s to incinerator or vapor recovery unit.

[selva2106]

Any body can tell me please, how to differentiate the off spec crude tank and on spec crude tank

[S.AHMAD]

Sorry sir nobody reply probably nobody appreciate your problems probably more details explanation needed.

 

s.ahmad