Fuel or Burner Injection
Fuel injection or burner pumps and the engineered systems that they are mounted on dispense fuel directly into the gas turbine or oil fired boiler. These pumps and engineered systems provide a mission critical operation for the power plant with the main pumps mounted in a three 50% capacity configuration: one as a hot standby; one for up to 50% load; and a third pump coming on for loads in the 50 to 100% range or two 100% capacity pumps (one running with one standby).
Pump applications require flow rates in the 50 to 400gpm range per pump for utility scale combustion‚ steam and combined cycle turbines with discharge pressures in the 700 to 1800 psi range. In specific applications‚ CIRCOR has worked with manufacturers to develop pump solutions that can handle discharge pressure of 2000 psi at a flow of 500GPM. Stationary diesel applications require lower flow rates and pressures.
Coal fired steam plants use Fuel or Burner injection pumps to pump oil into the burner to either keep the coal burning or speed the temperature rise in the boiler. In some applications where Bio-Mass fuel is incorporated the fuel or burner injection pumps will be operated in order to produce an even combustion temperature to compensate for varying BTU content in the Bio-Mass fuel. In combustion and combined cycle plants‚ liquid fuels (distillate‚ fuel oil #4‚ #6‚ etc.) are used as back up supply for the primary fuel natural gas.
Consistency of output and smooth pulsation free flow are primary criterion for purchase in fuel or burner injection pump applications making three screw‚ two screw or crescent internal gear pumps as the suitable choice. Often times‚ pumps are sized for 125 – 150% of the delivered flow requirements. Engineers design for future expansions and planned upgrades and design a bypass system to accommodate the excess flow delivered. Users should recognized that excess pumping costs money and running a bypass systems 24/7 can quickly eat up savings.
Finally‚ Allweiler brand ALLHEAT thermal oil centrifugal pumps are used in small decentralized biomass combined heat and power plants in an Organic Rankine Cycle (ORC) process. In this application‚ silicon oil is vaporized in a boiler and used in a steam turbine instead of water/steam. The heat cannot be transferred directly from the burner to the silicon oil as the heat is too high. Therefore‚ thermal oil is heated to around 150F/300C and this heat is then transferred to the silicon oil.
Flow Rates up to | Pressures to up to | Max Fluid Temperature | CIRCOR Brand‚ Series & Pump Type |
28 m^3/h 125 GPM | 345 bar 5‚000 psi | 82F 180C | IMO CIG Crescent Internal Gear |
78 m^3/h 343 GPM | 280 bar 4‚061 psi | 150C 302F | Allweiler VH Three Screw |
91 m^3/h 400 GPM | 34.5 bar 500 psi | 120C 250F | Imo 3D Three Screw |
91 m^3/h 400 GPM | 103 bar 1‚500 psi | 120C 250F | IMO 6D Three Screw |
91 m^3 / h 400 GPM | 151 bar 2‚200 psi | 120C 250F | IMO 12D Three Screw |
272 m^3/h 1‚200 GPM | 70 bar 1‚015 psi | 82C 180F | IMO 8L Three Screw |
750 m^3/h 3‚300 GPM | 21 bar 300 psi | 260C 500F | IMO 323F Three Screw |
792 m^3/h 3‚500 GPM | 97 bar 1‚400 psi | 121C 250F | Warren FSXA Two Screw |
1‚450 m^3/h 6‚380 GPM | 25 bar 363 psi | 400C 752F | ALLHEAT Centrifugal |
2‚500 m^3/h 11‚008 GPM | 80 bar 1‚160 psi | 400C 752F | Houttuin Engineered Two Screw |