Coal log pipeline: Development status of the first commercial system
- Univ. of Missouri, Columbia, MO (United States)
The coal log pipeline (CLP) is an innovative means for long-distance transportation of coal. In the CLP concept, coal is pressed into the form of cylinders--coal logs--that are propelled by water flowing through underground pipe. A coal log pipeline has many advantages when compared to coal transport by unit train, slurry pipeline and long-distance trucking: low-cost, low energy consumption, low-water consumption, simple dewatering at pipeline exit, safe, and environmentally friendly. The coal logs travel butted together, as trains. Between the coal log {open_quotes}trains,{close_quotes} some space is allowed for valve switching. The optimum diameter of a coal log is approximately 90 to 95% the inside diameter of the pipe. The coal-to-water ratio is about 4 to 1. A 200 mm diameter CLP can transport about 2 million tonnes of coal per year. The coal logs at their destination come out of the pipeline onto a moving conveyer which transports the logs to a crusher or stock pile. Coal logs are crushed to match the size of existing fuel. The water effluent is treated and reused at the power plant; there is no need for its discharge. Coal logs can be manufactured with and without the use of binder. By using less than 2 percent emulsified asphalt as binder, no heat is required to compact coal logs. Binderless coal logs can be compacted at less than 90{degrees}C. Compaction pressures, for coal logs made with or without binder, are about 70 MPa. The coal particle size distribution and moisture content must be controlled. The economics of coal log pipeline system have been studied. Results indicate that a new coal log pipeline is cost-competitive with existing railroads for distances greater than 80 km, approximately. CLP is much more economical than coal slurry pipeline of the same diameter. This paper describes the current R&D and commercialization plan for CLP. 4 refs.
- OSTI ID:
- 430509
- Report Number(s):
- CONF-960730-; TRN: 96:006487-0016
- Resource Relation:
- Conference: 5. world congress of chemical engineering, San Diego, CA (United States), 14-18 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 5th World Congress of chemical engineering: Technologies critical to a changing world. Volume III: Emerging energy technologies clean technologies remediation and emission control fuels and petrochemicals; PB: 1118 p.
- Country of Publication:
- United States
- Language:
- English
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