SUTEG dehydration unit removes water vapors from natural gas streams by means of triethylene glycol (TEG). The used wet rich glycol flows to a regeneration system where reconcentration of glycol is achieved. The lean glycol is circulated again in the system to continue the vapor removal process. The process parameters can be adjusted in order to maintain a certain value of the water dew point.
| MODEL | SUTEG |
|---|---|
| TECHNICAL CHARACTERISTICS |
Nominal flow rate: Q = 3600 ÷ 12.000.000 Nm³/day Nominal pressure: PN 16 ÷ PN 150 bar Role: to remove water vapour from natural gas stream at gas well field/underground natural gas storage facility gathering system - natural gas national transportation system Type: water vapour absorption from the natural gas stream by means of Triethylene Glycol (TEG) Dehydrated gas water content: corresponding to the dew point of the water entrapped in the natural gas < -15°C at the maximum working pressure (according to SR 3317: 2003) or 7 lbs. water/mil. Sft³ (0,112 g water/Sm³) natural gas (according to API 12 GDU) TEG circulation ratio: 16,7 ÷ 58,4 litres TEG/kg water absorbed (2 ÷ 7 gal. TEG/lb. water absorbed) Contactor diameter: DN 150 – DN 2000 Column type: trayed or packed TEG purity rate: ≤ 99,9 % Reboiler heating value: 20 ÷ 2000 kW TEG pump flow rate: 0,8 ÷ 60 l/min |
| EQUIPMENT COMPONENTS |
Absorber: Wet gas separator; Wet gas - TEG contactor Dry gas heat exchanger - lean TEG TEG Regenerator: TEG reboiler Lean TEG surge tank Stripping column Flash separator Fuel gas scrubber TEG particle filter TEG charcoal filter Lean/rich TEG heat exchanger Rich TEG distillation column heat exchanger Lean TEG - fuel gas heat exchanger Lean TEG - stripping gas heat exchanger Circulation pump lean TEG Instrumentation (pressure gauges, thermometers, level indicators, pressure and temperature transmitters, gas and TEG flow meters, level controller, hygrometer, burner control system, maximum temperature, minimum level, maximum differential pressure switches) Control panel which provides parameters display and data transfer (SCADA) Accessories: Wet gas cooler Underground liquid and solid particles storage tank Corrosion and foaming inhibitor injection system Additional TEG injection system Equipment skid BTEX, VOC, HAP regenerator |
