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首页> 美国政府科技报告 >Coal Gasification Pilot Plant Support Studies. Subtask 4-1. Development of Coal Preparation Techniques for Gasification Processes to Reduce Energy Requirements, Optimize Size Distribution, and Conserve Water
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Coal Gasification Pilot Plant Support Studies. Subtask 4-1. Development of Coal Preparation Techniques for Gasification Processes to Reduce Energy Requirements, Optimize Size Distribution, and Conserve Water

机译：煤气化试验工厂支持研究。子任务4-1。开发煤气制备技术以降低能源需求，优化粒度分布和节约用水

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The preparation and handling of gasifier feed coal can be done with a complete wet-handling and wet-preparation plant for mine-mouth coal gasification plants using water-based slurry transport. This study was concerned with five important areas of this wet-handling system that, prior to this program, have not been completely addressed: (1) Wet-Size Reduction of Coal; (2) Slurry Transport Characteristics of a Coarse Particle Size Stream; (3) Agglomeration Reduction of Caking Coals by Partial Oxidation in a Slurry; (4) Mechanical Dewatering of Coal-Water Slurries; and (5) Design of a Wet-Handling Plant From the Mine to the Gasifier Using Slurry Transport. Wet-size reduction, that is crushing in the presence of flowing water in certain types of high-throughput crushers, can reduce fines generation and power consumption while increasing throughput rates and providing a safe, dust-free operation. A coal-water handling system for coal gasification will require pumping of slurries of various size consists and solids concentrations for the short in-plant distances. Measurements were made with a typical gasifier feed-size consist in water slurries with coal concentrations of from 40 to 60 weight percent. Pumping characteristics were measured in a 2-inch pipeloop test facility, and rheological properties were measured with an extrusion rheometer. An experimental apparatus was designed and constructed to investigate the conditions for submerged oxidation pretreatment of caking coals. (ERA citation 06:001827)

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