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Show PAPER NO.10 SELECTIVE AGGLOMERATION TECHNOLOGY FOR PHYSICAL FINE COAL CLEANING B. WONG, Y. BRIKER AND W. PAWLAK S. HAADLLBEEYR, TAA. GRHESOESAHR ACNHD CDO. UHNCUCMILP HRIS ~. ,'.. ,'~ tL ... o* " PRAXIS ENGINEERS, IN • :;: ~ V -b 1.0 INTRODUCTION D. MOORE AND P. VIMALCHAND SOUTHERN ELECTRIC INTERNATIONAL., INC. T. PINKSTON AND T. JOHNSON SOUTHERN COMPANY SERVICES, INC. In April 1989, Southern Company Services signed a 3.5-year contract with DOE-PETC for generic engineering development of an advanced physical fine coal cleaning technology known as selective agglomeration. This technology offers the potential for significantly higher pyritic sulfur removal (over 90%) than conventional coal cleaning (30-50%) while maintaining high Btu recovery (90% and over). Engineering development includes bench-scale process development, component development, adaptation or modification of existing unit operations, proof-of-concept (POC) module design, fabrication, testing, and evaluation, and conceptual design of a commercial facility. The information obtained during POC operation will be sufficient to result in a technical and economic design base that can support construction and operation of a small commercial plant. The major goal of the research is to develop selective agglomeration technology to achieve 90% pyritic sulfur removal while operating at Btu recoveries of more than 90% based on run-of-mine quality coal. This objective will be accomplished in two phases--Phase 1: bench-scale and component development, and Phase 2: POC module operation and conceptual design of a commercial plant. The status of seven tasks comprising Phase 1 of the project are reviewed in this paper: project planning, preliminary conceptual design of a 20-t/h plant, determination of process uncertainties, test plan development, bench-scale process testing, unit operations testing, and evaluation of bench-scale and unit operations test results. Tasks 1-4 are complete and Tasks 5-7 are nearing completion. This project is being conducted by a multi-organization team headed by Southern Company Services, providing management and detailed design, Alberta Research Council, process development, Southern Electric International, Inc., construction and operations, and Praxis Engineers, Inc., process engineering. 2.0 TASK 1: PROJECT WORK PLAN In Task 1, a comprehensive work plan for the entire project was developed. This plan detailed all work to be completed by the project team for the two phases of the project. The plan was structured to serve as a guideline for the project staff in carrying out the various project tasks. A quality assurance/quality control (QA/QC) plan was also prepared as part of Task 1. 1 |