Greetings to all
I am trying to model a simple truck loading facility in hysys and continue to struggle.
The system is fairly simple. Trucks discharge into a bullet tank. The product is then injected into a crude oil pipeline.
This is an existing system the client is experiencing issues with.
System details
Product - Stabilized Condensate
VP = 9.64
SG = .66
IC4 - 0.084% (mol%)
NC4 - 1.221%
IC5 - 17.930%
NC5 - 20.33%
C6+ - 60.43%
P-1102 is a vertical can pump TDH = 1186 @ 100gpm. (32hp)
V-1000
Diameter - 10.83 ft
Length - 123.5 ft
MAWP - 202 psig
PCV-1103 is used to recycle product back to tank and to maintain min critical flow.
Currently there is no nitrogen pad on the tank. This is the primary reason for the current issues.
I was able to model the process with a constant 6psig on the vessel and was able to drain it dry basically.
The current operation offloads 13 trucks in a 24 hour period. 185 barrels each @ 350 barrels per hour per FE.
My issue is I can not get hysys to hold the 350 bph into the vessel. I had valves on inlets and outlets originally.
Can hysys schedule these 13 loads possibly as batches?
Is there a way to inject a nitrogen pad to maintain pressure in the vessel to prevent vacuum?
As trucks are coming into the vessel and product is injecting into pipeline plus recycling back to the tank, is there a way to quantify the mass flow that is vented to the flare?. Also the volume of N2 needed for a month?
Will API 2000 apply with 6 psig on the vessel?
I know what the system should look like. A N2 regulator for the pad with a PCV on the outlet bleeding to the flare as needed to maintain the set point.