Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report No. 3, October 1--December 31, 1977
Six additional cold-flow tests were conducted duplicating previous work by Tice. Results showed that Tice's earlier work contained consistently low gas results but that his conclusions are still valid. Modification of the facility to permit nonparallel secondary injection was completed. Coal feeder modifications were completed. A larger pressure equalization line was installed, a motor-driven stirrer was installed and variable depth, flighted augers were built and installed. With these revisions, the feeder now seems to operate uniformly and reliably. A preliminary feeder calibration was obtained. Both coal/oxygen-enriched air flames and coal/oxygen/steam flames were successfully ignited, stabilized, and maintained several times in the absence of preheating methane. The one-dimensional computer code was modified and applied to a five-particle-size system. Small particles ignite sooner and burn out faster than large particles. Reactor temperatures rise faster when small particles are present than when only one particle size is present. Devolatilization was essentially independent of particle size distribution. A calculation corresponding to an actual large-scale, char-fed entrained gasifier was completed for Foster-Wheeler Corporation. Integration of general gasifier computer model components was continued. Major revisions in one code allowing for fluctuating thermochemical properties were made. A technique to estimate the contact index such that turbulent fluctuations have an effect on the thermochemical equations was formulated and is being integrated into the code. Extra coal data required as input to the generalized model were obtained.
- Research Organization:
- Brigham Young Univ., Provo, Utah (USA). Dept. of Chemical Engineering
- OSTI ID:
- 6773446
- Report Number(s):
- TID-28226
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report, 1 May 1977-30 June 1977
Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report, 1 July 1976--30 September 1976. [7 refs]
Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
BENCH-SCALE EXPERIMENTS
CHEMICAL REACTORS
COAL GASIFICATION
DEVOLATILIZATION
ENTRAINMENT
FLAMES
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
GASIFICATION
MATHEMATICAL MODELS
MIXING
ONE-DIMENSIONAL CALCULATIONS
STABILITY
TEST FACILITIES