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Gas Treatment Plant. Chris, Stephanie, Mariam, Kyle Mentor: Jerry Palmer. Report Outline. Previous Questions Block Flow Diagram Detailed PFD's (stream #, components, P&T) for each process Energy sinks/loads, Equipment sizing, Cost in Aspen estimator for one process -- Hydrocarbon recovery.

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Gas treatment plant

Gas Treatment Plant

Chris, Stephanie, Mariam, Kyle

Mentor: Jerry Palmer


Report outline
Report Outline

  • Previous Questions

  • Block Flow Diagram

  • Detailed PFD's (stream #, components, P&T) for each process

  • Energy sinks/loads, Equipment sizing, Cost in Aspen estimator for one process -- Hydrocarbon recovery


Previous questions
Previous Questions

1. Sending 97% Nitrogen and 3% methane from Nitrogen rejection stream to NH3 plant.

2.Using thermal swing adsorber instead of a pressure swing adsorber.

To prevent the loss of feed gas in the bed during depressurization and also,the short time cycle in PSA can cause rapid re-pressurization that will lead to transient variation in the feed and product flow which will affect the operation of the plant

3. Using only one turboexpander for Hydrocarbon recovery.


Basis 310 mmscfd
Basis : 310 MMSCFD

Revenues

Midrex : 103 kmol/day (Transfer Cost)

Syn Gas:111 kmol/day (Transfer Cost)

Nh3 PLant : 50.4 kmol/day (Transfer Cost)

CHP :195.4 kmol/day (Transfer Cost)

Pipeline:4.8 kmol/day ($3.80/MSCFD)

LNG: 5000 BBL/day ($10.40/BBL)

NGL: 48990 BBL/day (~$22/BBL)





Aspen estimate demethanizer in hydrocarbon recovery
Aspen Estimate-Demethanizer in Hydrocarbon Recovery

Size:

Tower:

  • Vessel Diameter: 8.5 ft

  • Vessel Height 66 ft

  • Liquid volume: 11,249.5 gallons

  • 33 Trays

  • 24 inches between trays

    Condenser:

  • Area: 22,980.6 ft^2

    Reboiler:

  • Area: 7,803.94 ft^2

  • Tube length: 20 ft

    Reflux Pump:

  • Liquid flow rate: 1808.3 GPM

  • Efficiency: 70


Aspen estimate demethanizer in hydrocarbon recovery1
Aspen Estimate-Demethanizer in Hydrocarbon Recovery

Equipment Cost:

  • Tower: $3,059,300

  • Condenser: $419,000

  • Reboiler: $268,000

  • Reflux Pump: $17,200

    Total equipment cost for one Demethanizer Column:

    $3,763,500


Aspen estimate demethanizer in hydrocarbon recovery2
Aspen Estimate-Demethanizer in Hydrocarbon Recovery

Energy:

  • Tower: 28.03 MMBTU/hr

  • Condenser: 22.7 MMBTU/hr

  • Reboiler: 5.3 MMBTU/hr

  • Reflux ratio: .35


Aspen Estimate-Demethanizer in Hydrocarbon Recovery

Cost:

  • Total operation cost:

    19,031,900 $/year

  • Total capital cost:

    $12,567,400



Energy loads and sinks
Energy Loads and Sinks

  • PFD-001: Compression = 6888 HP

    Heating = 1.7MMBTU/HR

  • PFD-002 and PFD-003: Estimated total of

    139MMBTU/HR

  • PFD-004:Air Cooling =3.4MMBTU/HR

    Compression = 880HP

    Heating = 44.6MMBTU/HR

  • PFD-005: Refrigeration = 56.3 MMBTU/HR

  • PFD-006: Heating = 8 MMBTU/HR

  • PFD-007: Compression = 1260 HP

    Refrigeration = 58 MMBTU/HR

  • PFD-008: Compression = 920HP


Major equipment costs
Major Equipment Costs

  • 6 molecular sieve Adsorbers installed

    $ 6,690,000

  • 24 Tray Nitrogen Rejection Column Installed $2,300,000

  • Absorbing and Stripping Columns for MDEA treatment, approximately 25 trays each intstalled

    $2,500,000



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