Oil and Gas Technology Program Oil and Gas Technology Program PTRT 1317 Natural Gas Processing I Chapter 6A Intro to Refrigeration

Oil and Gas Technology Program 2 Amine Contactor Overhead Scrubber Amine Contactor Gas Cooler Amine Contactor Feed Heater Treated Gas Flow Gas to Gas After Scrubber This drawing shows the Treated Gas Flow from the Amine Contactor through the final equipment to Sales.

Oil and Gas Technology Program Recover condensed liquids Final process step before gas enters refrigeration During refrigeration water is removed using cold temperatures From Amine Feed Heater To Refrigeration Plant Gas/Gas Heat Exchangers

Oil and Gas Technology Program DEHYDRATION

Oil and Gas Technology Program DRAWING 05A

Oil and Gas Technology Program 332 MMCFD 976 psig 120 F 8 gpm 110 F 10 gpm 956 psig 328 MMCFD -30 F MMCFD 39 GPM HC 13 GPM EG/Water 1.2 MMCFD 980 psig 120 F 77% C1 9% C2 6% C3 2% C4+

Oil and Gas Technology Program GAS/GAS EXCHANGERS DRAWING 05A EG Injection Exchange heat between Warm Treated Gas from sweetening and Cold Treated Gas from Cold Separator yields Dry Gas to Sales Ethylene Glycol injected into Wet Treated Gas upstream of exchangers and directly into the head at the tube sheet

Oil and Gas Technology Program

Oil and Gas Technology Program DRAWING 05B Wet Treated Gas in the tube side. Refrigerant Propane in the shell side EG injected into Wet Treated Gas upstream of Chiller inlet and directly into the head at the tube sheet

Oil and Gas Technology Program DRAWING 05B LIC-4432 operates LV-4432 to maintain a sufficient level to keep the tubes covered LV-4432

Oil and Gas Technology Program DRAWING 05B Refrigerant Reclaimer removes unwanted refrigerant components. Heavier contaminants drain off the bottom of the chiller into the Reclaimer where Hot Oil flashes the propane out and into the Compressor vapor return line. Contaminants drain to a sump.

Oil and Gas Technology Program DRAWING 05B

Oil and Gas Technology Program DRAWING 05B Three phase separator (SEE ILLUSTRATION)

Oil and Gas Technology Program DRAWING 05B 5

Oil and Gas Technology Program CONDENSATE STABILIZATION

Oil and Gas Technology Program Condensate Stabilization Hydrocarbon liquids from the three-phase separator move to condensate stabilization beginning with another three- phase separator Stabilizer usually a fractionation column – Produces stabilized condensate product from the bottom – Produces hydrocarbon gas stream from the overhead

Oil and Gas Technology Program Condensate Stabilization

Oil and Gas Technology Program Condensate Stabilizers Hydrocarbon liquids stabilized by “flashing” that quickly vaporizes liquids to lower pressures in a series of heaters and separators Stabilization column with reboiler and liquid feed from the top yields higher quality and better- controlled final product Trays yield better turndown performance – Bubble cap trays (10:1 or 10%) – Valve-tray towers (30% - 40%) Bottom temperature should not exceed 400 ⁰F to avoid hydrocarbon degradation and to ensure that water can leave from the bottom

Oil and Gas Technology Program Condensate Reboilers For large amount of hydrocarbon liquids - two 70% capacity reboilers are recommended – Better on-stream factor – When one breaks down the other can maintain throughput For smaller amounts of hydrocarbon liquids – single 100% capacity is recommended – Hydrocarbon liquids can accumulate in the slug catcher until the single reboiler comes back online

Oil and Gas Technology Program Stabilizer Overhead Compressors Reciprocating compressors – Higher maintenance requirements – Recommended Low flow rates High pressure Frequent composition changes to feed Centrifugal compressors – Interstage cooler for high compression ratios – Protect seals from high discharge temps (> 350 ⁰F)

Oil and Gas Technology Program Condensate Stabilization

Oil and Gas Technology Program DRAWING 05B 5

Oil and Gas Technology Program 6 DRAWING 06

Oil and Gas Technology Program 7 DRAWING 06

Oil and Gas Technology Program 8 DRAWING 07

Oil and Gas Technology Program ETHYLENE GLYCOL REGENERATION

Oil and Gas Technology Program 9 DRAWING 05B

Oil and Gas Technology Program 9 DRAWING 05B ACID GAS COOLER

Oil and Gas Technology Program 9 DRAWING 15

Oil and Gas Technology Program 10 DRAWING 18B

Oil and Gas Technology Program DRAWING 18B 11

Oil and Gas Technology Program 12 DRAWING 18A

Oil and Gas Technology Program DRAWING 18A 13

Oil and Gas Technology Program 14 DRAWING 18B

Oil and Gas Technology Program REFRIGERATION LOOP

Oil and Gas Technology Program 2 DRAWING 05B From gas/gas exchangers To cold separator

Oil and Gas Technology Program 2 DRAWING 05B

Oil and Gas Technology Program DRAWING 05B 3

Oil and Gas Technology Program From gas/gas exchangers To cold separator 15 DRAWING 08

Oil and Gas Technology Program From gas/gas exchangers To cold separator 16 DRAWINGS 09A & 09B

Oil and Gas Technology Program 16 DRAWINGS 09A & 09B HP 2 stage compressors capable of moving 4.4MMSCFD of propane each at 210 psig

Oil and Gas Technology Program From gas/gas exchangers To cold separator 17 DRAWING 09B

Oil and Gas Technology Program DRAWING 09B HP fans for each bay 3 bays total Duty; 16,300 MBTU each bay

Oil and Gas Technology Program From gas/gas exchangers To cold separator 18 DRAWING 10

Oil and Gas Technology Program DRAWING Acts like a Refrigerant Surge Tank Level is maintained manually by adding Refrigerant Propane to the Chiller Refrigerant inlet line from the Refrigerant Storage Tank

Oil and Gas Technology Program From gas/gas exchangers To cold separator 19 DRAWING 08