High-Temperature Turbine-Technology Program. Phase II. Technology test and support studies. Design and development of a regeneratively fuel cooled high temperature gas turbine combustor for operation on low Btu gas
The fuel-air requirements for low Btu gas combustors result in a paucity of cooling air which results in low Btu gas-fueled air cooled combustor designs with annular configurations with complex flow path schemes to maximize cooling efficiency. These design trends are in the direction of reduced maintainability and reliability. Alternatively, if the low Btu gas can be utilized as a cooling medium before it is combusted, conventional multiple can arrangements with simple convection-cooled liner can be developed. This report describes the design, fabrication and test of a full scale industrial gas turbine burner can with convective cooling of the liner wall by 150 Btu/scf gaseous fuel typical of air-blown gasification of coal. The entire primary combustion zone burner wall surface area was cooled with 375/sup 0/F LBG fuel, which after cooling the wall was reinjected for combustion. The fuel gas cooling passage is a concentric annulus of nominal .140'' height, designed to limit linear temperature to a maximum of 1200/sup 0/F at approximately 4% gas supply pressure loss. The 10-in. internal diameter combustor can was successfully operated up to 6 atmospheres pressure, burning 150 Btu/scf gaseous fuel up to 3000/sup 0/F average exit temperature. The fuel cooling effect and combustor exit emissions levels were determined for gas supply temperatures of 150 and 375/sup 0/F. All liner temperature measurements were well below the average 1200/sup 0/F estimated for the 3000/sup 0/F design point. This was confirmed by post-test visual inspection of all components which were found in excellent condition. In addition, the NO/sub x/ emissions level at the nominal 3000/sup 0/F combustor exit temperature was substantially below the EPA regulatory level of 75 ppM when adjusted for pressure level effect of 15 atm and 15% oxggen.
- Research Organization:
- Curtiss-Wright Corp., Wood-Ridge, NJ (USA). Power Systems Div.
- DOE Contract Number:
- AC01-76ET10348
- OSTI ID:
- 6535162
- Report Number(s):
- CW-WR-76-020.104A; ON: DE83007342
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
COMBUSTION
COMBUSTORS
CONTROL
COOLING
DATA
DESIGN
EXHAUST GASES
EXPERIMENTAL DATA
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GAS TURBINES
GASEOUS WASTES
GASES
GASIFICATION
HIGH TEMPERATURE
INFORMATION
LOW BTU GAS
MACHINERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION REGULATIONS
POWER PLANTS
REGULATIONS
STEAM TURBINES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTES