Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report No. 5, April 1, 1978--June 30, 1978
Twenty six atmospheric, cold-flow mixing tests were completed with 21 yielding final data. Flow asymmetry problems were encountered when using nonparallel injection into the recirculation chamber. Attempts to align the test system improved but did not completely resolve this problem. Revised methods of data analysis further improved interpretation of these data. Most previous cold-flow tests were conducted with a very short test section following the probe collar and then a sudden reduction in flow area. New tests with longer aft-test sections showed little effect of post test section length on measured mixing profiles. The gasifier has been modified and several parts of the system pressure-tested in anticipation of starting the high-pressure cold-flow test program. A new back-pressure regulator has been ordered. Eleven atmospheric gasification tests were performed with the gasifier during this period. The prototype sample probe has been shown to work and the complete probe-sample collection system has been designed and constructed. An over-pressurization of part of the gasifier exhaust system resulted in a failure and month-long interruption of testing occurred while a new sytem was installed. Testing has now been resumed. Predictions were made with the one-dimensional coal gasifier computer model for the 5 ST/hr Bi-Gas gasifier, and the Coates entrained gasifier and results were compared with limited measurements. Work has continued on the generalized two-dimensional gasifier model. The probability distribution function formulation to describe diffusion-limited gas-phase combustion has been completed and tested. Thus, the two-dimensional code is now functional for gaseous systems.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- EF-77-S-01-2666
- OSTI ID:
- 6542370
- Report Number(s):
- FE-2666-3
- Country of Publication:
- United States
- Language:
- English
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Mixing and gasification of coal in entrained flow systems. Quarterly technical progress report No. 4, January 1--March 31, 1978
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