David,
Qs is actual volume flow rate at suction conditions which as you mentioned is not independant of feed Mw. Maybe this needs to be plotted against compressor speed then?
Greg
Thanks for the help David & pmover.
The compressor feed molecular weight changes with reactor temperature and fresh feed properties. These conditions (and some others) are continually changing which is why it would be helpful if we could track compressor performance irrespective of feed mole...
Currently the feed rate to our FCC plant is limited by the wet gas compressor performance (2-stage variable speed centrifugal compressor).
We have conducted a survey on this compressor and have plotted the polytropic head (corrected to a standard speed) versus actual flow. The polytropic head...
Thank you all for your feedback.
I found the following papers that describes how to address this issue:
1) Tsai, M.J. "Accounting for Dissolved Gases in Pump Design", Chemical Engineering, July 26, 1982, pp65-69
2) Chen C.C. et al, "Cope with Dissolved Gases in Pump Calculations", Chemical...
Hello Roker,
The feed to the separator is from several oil wells.
The existing pumps are positive displacement pumps that are fed using charge pumps. We are looking to replace these pumps with higher capacity centrifugal pumps.
The static head available is approx 4m of water whereas the...
I am working on a project to replace the pumps that are used to pump a water stream leaving a three-phase separator. The three phase separator operates at 60 deg C and 111kPaa. I have assumed that the water-rich stream being pumped is at equilibrium with the oil and vapor streams leaving the...
TD2K,
I would like to expand on my previous remark after reviewing my thermo book.
The partial compressibility factor is the partial derivative of Z wrt n1 keeping T & n2 constant.
If we use the simplest form of the virial equation to calculate Z (i.e. Z=1+BP/RT), the partial compressibility...
TD2K,
In response to your question;
The compressibility factor is a pure component or mixture property and not a partial property such as the vapor fugacity of methane in a mixture.
Greg
Terri,
Sorry, I have not heard of a caustic bead before.
It sounds as though you might have two different options to consider (i.e. distillation and adsorption) and that you will need to perform preliminary sizing then costing to decide which route is the best.
Regards
Greg
Assuming that the impurities you have mentioned are methyl-chloride (BP=-24.22 C) and vinyl-chloride (BP=-13.9 C),there should be NO need to use a solvent such as a caustic solution or amine solution to "scrub" these components from ethylene (BP = -103.7 C). This separation is...
Flooding = accumulation of liquid within the column.
If liquid accumulation occurs below the feed you could observe erratic level in the column sump. If liquid accumulation occurs near top of column, you may see erratic level in reflux drum. A further symptom of flooding is poor separation due...
The high tray efficiency you need for the top p/a tray efficiency to match the duty is probably symptomatic of too few stages below this point. Use 1 theo. stage for the p/a trays (as suggested by TLkemp) and adjust stage in section below to see if this helps. I would start off by assuming a...
Dear All,
The feed to a methane reformer unit comprises of H2, C1, C2, C3 etc. As the SG of the feed increases, carbon deposition in the feed convection heater tubes as well as in the primary reformer catalyst tubes occurs. To prevent carbon deposition from occuring the steam to carbon ratio...
