LIQUIDS SEPARATION & DEHYDRATION

GAS PROCESSING

HEAT TRANSFER: OIL FIRED, GAS FIRED, ELECTRIC HEATERS

Superior Solutions For Turbine Fuel Gas Conditioning

Maximize your equipment’s performance by meeting the manufacturer’s requirements for fuel gas. ETI offers a complete line of proven turbine and engine fuel gas conditioning equipment. We can provide these items as individual components or completely assembled. Skids for simple-cycle or combined-cycle applications can be packaged with all interconnecting piping, valves and instrumentation. Contact ETI for fuel gas conditioning equipment including: • Liquid Knockouts/Vane Separators • Filter Separators • Fuel Gas Metering Skids • Pressure Regulation Skids • Pipeline Water Bath Heaters • Dew Point Heaters • Start-Up Heaters • Performance Heating Skids • Coalescers • Cyclone Separators • Drains Tanks • Simple Cycle Fuel Gas Modules • Combined Cycle Fuel Gas Modules • Joule-Thompson Treatment Skids

Fuel Gas Requirements.Turbine and engine manufacturers specify certain requirements for fuel gas to ensure that output, efficiency, emissions guarantees and service life expectancies are met. These requirements can typically be categorized in four main areas:

1. Heating Value: The acceptable range of calorific values (BTU content) for the turbine gas. A chromatograph will analyze a gas sample for components in accordance with recognized standards such as ASTM D1945 and provide the heating value of the gas at the time of the sample.

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900 KW Electric Fuel Oil Heater

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2. Contaminants: Only certain types and levels of contaminants are allowed. Contaminants can include:Water - The amount allowable in the gas stream is usually measured as pounds-of-water per MMscf. Water is often measured with a dew point analyzer. Hydrocarbons - The amount, if any, of liquid hydrocarbons allowable in the gas stream. This is usually expressed as a hydrocarbon dew point and measured via a sample of gas taken into a dew point analyzer. It can also be calculated from a sample of gas analyzed for components through C14. An industry standard for this analysis is GPA 2286.Rust/Oxides - These items are products of equipment and piping fabrication, installation and testing.Iron Sulfide - Iron sulfide is present as a result of sulfur present in the fuel gas.Lubricating Oil - This can be introduced into the fuel gas by valves and compressors located upstream of the turbine, including those associated with natural gas pipeline booster stations and natural gas storage facilities.Glycol - Glycol is widely utilized throughout the natural gas production, transportation and storage industry because of its hydrophilic properties. Common equipment/processing specifications allow 1/10 of a gallon carryover of glycol per MMscf of gas processed.

3. Fuel Gas Pressure: Controlled fuel gas pressure is critical to proper turbine operation. Two areas of concern include:Pressure Regulation - Fuel gas is often transported or stored at pressures other than that required by the turbine. Often pressure regulation valves (PRV) are required to reduce the pressure.Rate of Change - The rate at which pressure varies is called pressure excursion. Turbine manufacturers often limit this rate of change to promote smooth operation and eliminate spikes or voids in the operating profile.

4. Fuel Gas Temperature: Temperature is a critical component of turbine fuel gas conditioning equipment and affects several aspects of fuel gas.Limits - There are normally minimum and maximum temperature restrictions imposed on the fuel gas depending on the type of turbine and its application.Superheat - Heating a fuel gas (not in contact with its own liquid) so it remains free from suspended liquid droplets. Superheat is applied to prevent the formation of liquid droplets in subsequent equipment, such as piping and or pressure reduction valves and regulators.Performance Heat - Performance heat added to the fuel gas improves the efficiency of the overall power plant operation. Performance heating is often associated with combined cycle operation.Rate of Change - Failure of the heating system to react to changes in fuel demand results in temperature spikes and plant upsets and inefficiencies.

Fuel Gas Conditioning JT Skid for hydrocarbon

dew point control, installed in Colombia,

South America.

2.5 MM BTU/HR Gas-Fired Dewpoint Heater with Low NOx burners, Vertical

Gas Filter/Coalescer and Drain tank.