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Fuel Gas Conditioning Systems. Wide Variety From Pipeline.

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Presentation on theme: "Fuel Gas Conditioning Systems. Wide Variety From Pipeline."— Presentation transcript:

1 Fuel Gas Conditioning Systems

2 Wide Variety

3 From Pipeline

4 To Turbine

5 Cleaning Stages –Knockout –Fine Filtration –Last Chance Filter Pressure Reduction Flow Metering Heating From the Pipeline to the Turbine

6 Fuel Gas Specifics Leaves the Pipe Line 700 – 1000 psig 7 lb/ mmSCF 30-90 °F Aerosols and Particulate Enters the Turbine 350-450 psig 7 lb/ mmSCF Up to 350 °F Free from Aerosols and Particulate

7 Fuel Gas Composition Sweet: –Typical Natural Gas –Does not contain significant amounts of H 2 S or CO 2 Sour: –High H 2 S Content –Highly Corrosive –NACE Typical Fuel Gas Composition ComponentMol % Methane95.513 Ethane2.45 Propane0.506 N-Butane0.1 I-Butane0.11 N-Pentane0.022 I-Pentane0.036 Neo-Pentane0.0 Hexane+0.054 Oxygen0.0 Carbon Dioxide0.853 Nitrogen0.356 Maximum Total Sulfur 0.0

8 Knockout (Scrubber) Primary Filtration Gross Liquid and/or Solid Removal Mechanical Separation –Vanes – impingement –Multi Cyclones – centrifugal force

9 Knockout Accessories Drain Tank Level Indicator Level Switches Automatic Drain Valve Relief Valve Pressure Gage Differential Pressure

10 Pressure Reduction Sliding Stem Valves with Positioners Reduces the pressure of the gas from 700- 1000 psi to 400-450 psi Protects Turbine Improves Turbine Efficiency

11 Fine Filtration Filter Separators –99% 0.5 – 3 micron Coalescer –99.98% of.3 μm Solids and Liquids Dual Filters < 3 psi Drop Clean

12 Filter Accessories Ladder and Platform Isolation Valves Level Indicator Level Switches Automatic Drain Valve Relief Valve Pressure Gage Differential Pressure

13 Performance Heater Shell and Tube Heat Exchanger –100% of Gas Flow –Heats Gas to ~350 ° Boiler Feed Water Controlled by Throttling Water Discharge

14 Start-Up Heater Electric Heater –~25% of Gas Flow –50 F Temperature Rise 50 F Above Dew Point SCR or Step Control

15 Water Bath Heater Gas Fired Heater –100% of Gas Flow –Heats Gas to ~180 ° U-Bend Controlled by Throttling Gas Flow/Bypass

16 Detection Tank Mechanical Separator – Multi-Cyclone Capture Water from Heat Exchanger Leak Instruments –Level Switches –Level Gages –Level Transmitters

17 Flow Metering Custody Transfer –Not Clark-Reliance Individual Turbine Flow Measurement Orifice Meter

18 Last Chance Filter Final Stage of Protection for Turbine Coalescing Filter 99.98% Removal of.3 μm particles Level Instruments Manual Drain Differential Pressure

19 Sales Opportunity - Filtration Filter Vessels – Anderson Product –AMCS –AVGS –ACF Elements Aftermarket

20 Sales Opportunity - Instrumentation Jerguson –Level Gages –Mag Gages –Level Switches Other –Pressure Gages –Differential Pressure –Temperature Gages

21 SIEMENS – EVANDER ANDREWS Scope –Vane Separator –Coalescer –Drain Tank –Level Controls –Piping –Valves –Junction Box

22

23 CALPINE – OTAY MESA Scope –Electric Startup Heater with SCR Control Panel –Performance Heat Exchanger Vane Separator Coalescing Filter Piping Valves Drain Tank

24

25 JANTESA – SANTA ROSA Scope –Unit Skids –Electric Heater –Heat Exchanger –Coalescing Filters –Automatic Valves –Piping –Junction Box

26 UE – TRACY STATION Scope –Vane Separator –Pressure Reducing Valves –Flow Measurement –Piping and Valves –Water Bath Heater ETI

27 UE – NRG – CEDAR BAYOU Performance Heaters Startup Heaters with SCR Control Panels Coalescing Filters Multi-Cyclones Instrumentation

28

29 Conclusion Fuel Gas Filtration equipment controls –Temperature –Pressure –Contaminant A variety of setups are used to manage a variety of situations


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