Slurry suspension of coal logs -- an exploration study
This is an experimental investigation studying the effects of a coal slurry medium on the transportation of coal logs through a pipeline. The higher-specific-gravity slurry as compared to water, will create a near neutrally buoyant environment for coal log transport. This will enable the transportation of the logs at lower velocities. The equations for predicting incipient velocity, lift-off velocity, headloss (energy loss), will be determined for the slurry and compared to previous data using a water medium. A two inch pipeline system is used to test the coal logs in a slurry medium. The test facility will be capable of testing coal logs at velocities ranging from 0 to 10 ft/sec. These velocity ranges are required to characterize the transport regimes of coal logs, i.e. incipient velocity to lift-off velocity. The slurry is characterized by its particle size distribution (PSD), the viscosity, and the yield stress. The slurry used in this investigation is from the Black Mesa pipeline. Using coal slurry for coal log transport in pipeline has two major advantages over water. First, the slurry will reduce the amount of water (50% by weight) required to transport the coal logs and increase the coal throughout. Secondly, the velocity of the log will be reduced, thereby reducing the operational velocity of the pipeline. In addition to these two advantages, current research into the manufacturing of coal logs indicates a trend toward high density (specific gravity = 1.3), high compressive strength logs, for resistance against abrasion. Transporting high density logs makes the coal slurry investigation an interesting aspect of the coal log pipeline program.
- OSTI ID:
- 45135
- Report Number(s):
- CONF-930413-; TRN: 95:003334-0062
- Resource Relation:
- Conference: 18. international technical conference on coal utilization and fuel systems, Clearwater, FL (United States), 26-29 Apr 1993; Other Information: PBD: 1993; Related Information: Is Part Of Proceedings of the 18th international technical conference on coal utilization & fuel systems; PB: 926 p.
- Country of Publication:
- United States
- Language:
- English
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