HP seperator volume design HP seperator volume design wangduyu (Petroleum) (OP) 14 Jan 15 01:17 Hi, I am working on a HP seperator for LNG feed gas, I wonder what is the input and how to decide the volume and width/longth of HP seperator(vapor and liquid). Anyone have good answer? Thanks a lot. RE: HP seperator volume design BigInch (Petroleum) 14 Jan 15 01:38 Get the dimensions off a vendor http://www.surfaceequip.com/two-three-phase-vertic... RE: HP seperator volume design wangduyu (Petroleum) (OP) 14 Jan 15 02:30 good answer~ RE: HP seperator volume design LittleInch (Petroleum) 14 Jan 15 09:15 As BI says, and from the tables it is dependant on: Flowrate, Inlet pressure, volumes of liquid, both steady state and slugs or surge volumes you want to cater for Degree of liquid separation you want / need 9 the more the bigger the vessel on average Single phase liquid or two phase (water/ condensate) Lots of variables so lots of possible sizes... My motto: Learn something new every day Also: There's usually a good reason why everyone does it that way RE: HP seperator volume design wangduyu (Petroleum) (OP) 14 Jan 15 23:59 Thanks BI & LI. Yes, to save cost, perform pre-treatment is important, make the 2-phase flow stable. RE: HP seperator volume design mbt22 (Chemical) 15 Jan 15 08:55 As much as I am unwilling to disagree with either of the eminent posters above, I would argue that you need to be able to at least do a back of the envelope sizing before going to vendors. Perhaps it might not be necessary if you've specified dozens before and have an instinctive feel for what is reasonable, but I find it helps me to understand what factors are driving the design. I don't have it to hand right now, but from memory the GPSA manual has some guidelines. Matt RE: HP seperator volume design BigInch (Petroleum) 15 Jan 15 10:06 Later when you have time, you can calculate the actual volume of gas at the average pressure within the separator, calculate it's velocity over the liquid and make the vessel long enough, or tall enough to remain within the vessel for the required time such that entrained liquid droplets fall out. RE: HP seperator volume design weldstan (Materials) 16 Jan 15 21:45 First you need to define the quantity of C2, C3, C4, CO2, H2O, etc. the feed gas. If anything like the gas plant that is being designed to treat incoming sales gas for LNG production and export, multiple separators will be required. RE: HP seperator volume design wangduyu (Petroleum) (OP) 16 Jan 15 22:19 Thanks, with example from surfaceequip website, I believe that, giving Feed gas property, including pressure, temp. Flow rate, percentage of content, experience vendoer procvide solution, including PSV etc. Maybe manufacturer can do more than that.