Development of a coal burning vortex containment combustor. Quarterly report No. 1, isothermal testing results and design documentation

Technical Report · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5830298

LaFond, J F; Chen, S L; Heap, M P; Seeker, W R

The Vortex Containment Combustor is an advanced cyclonic coal combustor which utilizes design concepts developed by the Department of Defense at Wright-Patterson Air Force Base in the 1960's and early 70's and by EER during recent bench-scale tests. Major features of the VCC design include: Vortex Flow which Reverses on Itself, Long Fuel Residence Time in an Aerodynamic Suspension, Selective Ash Rejection from a Combustion Zone, and Radial Velocity Component of Inlet Air to Prevent Wall Deposition. These features are presented in Figure 1-1. Air flow enters the VCC through tangential slot injectors in a narrow, large diameter region. The air circulates, moves down into a conical section, then reverses upon itself to form an intense high speed vortex core that leaves the chamber. Coal particles are suspended in an active zone away from the exhaust flow. As combustion consumes carbon inert mineral matter remains. The smaller size distribution of the residual ash causes the material to be selectively removed from the active zone. The mineral matter is then centrifugally thrown to the walls of the conical section to form a running slag. Coal particles burn free from the walls, allowing high power densities and much less dependence on coal type. The inlet air is injected with a radial component of velocity to prevent undesirable active zone wall deposition. The program has been approached in a three task format: Design Definition; Prototype Construction and Checkout; and Prototype Testing and Evaluation. The design definition task includes an evaluation of the process requirements which the VCC must satisfy in order to be applied (e.g., turndown ratio, adiabatic operation, pollution control, etc.). Also, design optimization through an isothermal flow modeling and scaling analysis is included in the design definition task. 18 figures.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• DOE Contract Number: AC22-83PC60420
• OSTI ID: 5830298
• Report Number(s): DOE/PC/60420-T1; ON: DE85009079
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CYCLONE COMBUSTORS
BENCH-SCALE EXPERIMENTS
DESIGN
FUNCTIONAL MODELS
SCALING LAWS
ASHES
COAL
COMBUSTION
EXPERIMENTAL DATA
FUEL FEEDING SYSTEMS
PLANNING
PRESSURE DROP
RETENTION
VORTEX FLOW
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTORS
DATA
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUEL SYSTEMS
FUELS
INFORMATION
MATERIALS
NUMERICAL DATA
OXIDATION
RESIDUES
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion