At-Sea Test and Demonstration of Coal-Oil Mixture as a Marine Boiler Fuel. Part I: Shoreside Testing

摘要

This report documents laboratory and wear-loop experimental evaluations and a combustion test using a full-scale Marine burner and fuel-supply equipment using a coal/oil mixture (COM). Laboratory work led to selection of a fuel acceptable for use in a shipboard demonstration from six candidate COMs. Significant variations were discovered among these samples, and an appropriate final selection was made for the shipboard tests. This COM was further evaluated during a land-based combustion test using a Marine burner (30 million-Btu/hr scale) installed in an industrial package boiler. Comparative tests using No. 6 fuel oil and the selected COM were performed along with a general shakedown and test run of the pump and heating set designed for the at-sea demonstration. Combustion tests indicated that the replacement of No. 6 fuel oil with the proper COM is quite feasible. However, close attention must be given to the handling and atomization of this fuel. A modified T-jet atomizer performed with acceptable levels of wear, plugging, and ash disposition problems. It was concluded that an at-sea demonstration of the COM should be pursued.