Preliminary Economic Analysis of Bureau of Mines Low-Btu Gasification:Combined-Cycle Power Generating System Producing 299.0 Megawatts,Pittsburgh Coal Seam.

摘要

The Bureau of Mines has developed and operated a pilot-plant size,fixed-bed gas producer which operates at 120psig and burns caking coals;that is,no pretreatment is necessary. The pilot plant data have been supplied by Bureau of Mines personnel and were collected from experimental runs on a highly caking Pittsburgh seam coal. On the basis of the pilot plant data,power costs have been estimated for a full size plant based on July 1975cost indexes. The evaluation includes sulfur removal,an ammonium sulfate plant, a water-scrubbing system for tar removal,and a combined-cycle power generating plant. A fixed-bed pressure producer gasification plant to gasify 140.4tons per hour of Pittsburgh seam coal with a combined-cycle power generation system to produce 299MW net power will require a capital investment of $151,221,200or $505.76per kW of net generating capacity. The selling price of power to support a 17-percent capital charge,with the cost of coal a parameter,will vary from 22.4to 24.3mills/kW-hr for coal costs varying from $11to $15/ton. (ERA citation 01:018421)