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Published byAlberta Laura Norton Modified over 9 years ago
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Fuel Gas Conditioning Systems
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Wide Variety
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From Pipeline
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To Turbine
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Cleaning Stages –Knockout –Fine Filtration –Last Chance Filter Pressure Reduction Flow Metering Heating From the Pipeline to the Turbine
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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
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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
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Knockout (Scrubber) Primary Filtration Gross Liquid and/or Solid Removal Mechanical Separation –Vanes – impingement –Multi Cyclones – centrifugal force
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Knockout Accessories Drain Tank Level Indicator Level Switches Automatic Drain Valve Relief Valve Pressure Gage Differential Pressure
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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
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Fine Filtration Filter Separators –99% 0.5 – 3 micron Coalescer –99.98% of.3 μm Solids and Liquids Dual Filters < 3 psi Drop Clean
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Filter Accessories Ladder and Platform Isolation Valves Level Indicator Level Switches Automatic Drain Valve Relief Valve Pressure Gage Differential Pressure
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Performance Heater Shell and Tube Heat Exchanger –100% of Gas Flow –Heats Gas to ~350 ° Boiler Feed Water Controlled by Throttling Water Discharge
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Start-Up Heater Electric Heater –~25% of Gas Flow –50 F Temperature Rise 50 F Above Dew Point SCR or Step Control
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Water Bath Heater Gas Fired Heater –100% of Gas Flow –Heats Gas to ~180 ° U-Bend Controlled by Throttling Gas Flow/Bypass
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Detection Tank Mechanical Separator – Multi-Cyclone Capture Water from Heat Exchanger Leak Instruments –Level Switches –Level Gages –Level Transmitters
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Flow Metering Custody Transfer –Not Clark-Reliance Individual Turbine Flow Measurement Orifice Meter
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Last Chance Filter Final Stage of Protection for Turbine Coalescing Filter 99.98% Removal of.3 μm particles Level Instruments Manual Drain Differential Pressure
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Sales Opportunity - Filtration Filter Vessels – Anderson Product –AMCS –AVGS –ACF Elements Aftermarket
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Sales Opportunity - Instrumentation Jerguson –Level Gages –Mag Gages –Level Switches Other –Pressure Gages –Differential Pressure –Temperature Gages
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SIEMENS – EVANDER ANDREWS Scope –Vane Separator –Coalescer –Drain Tank –Level Controls –Piping –Valves –Junction Box
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CALPINE – OTAY MESA Scope –Electric Startup Heater with SCR Control Panel –Performance Heat Exchanger Vane Separator Coalescing Filter Piping Valves Drain Tank
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JANTESA – SANTA ROSA Scope –Unit Skids –Electric Heater –Heat Exchanger –Coalescing Filters –Automatic Valves –Piping –Junction Box
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UE – TRACY STATION Scope –Vane Separator –Pressure Reducing Valves –Flow Measurement –Piping and Valves –Water Bath Heater ETI
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UE – NRG – CEDAR BAYOU Performance Heaters Startup Heaters with SCR Control Panels Coalescing Filters Multi-Cyclones Instrumentation
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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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