OCR Text |
Show with poorer washability characteristics: use of high (coking) quality coal is planned for the first trials to minimize problems with ash handling but coal from a seam with lower quality could save $20 per tonne (of coal). The prepared fuel will be held in day-storage tanks for regular delivery by tank truck (three trucks 3 per day for some 750 km) to Chatham: storage tanks of 500 m capacity already in existence at Chatham will form the buffer to match demand with production capacity. Fuel production costs will be recovered by the producer through the price charged to the electric utility. The utility will pass on the differential between this price and normal coal-fired generating costs, as well as the cost of burner development, to the federal government. The schedule, which calls for construction of the pilot plant to begin in August 1982, should be completed by March 1983 with start-up tests in April and May and regular fuel production in June 1983. Concurrently with the construction of the coal-water pilot-plant preparation facility, a program to develop slurry burners for the 10 MW(e) front-wall fired and 22 MW(e) tangentially fired units at Chatham NB will be undertaken. The two phases of the coal-water program are as follows: Phase I: Design, testing and evaluation of a burner rated at approximately 30 GJ/h thermal input, of a type suitable for coal-water slurry fuel combustion in the 10 MW(e) front-wall fired Chatham Unit No. 1. A testing and evaluation program for the burner together with boiler performance assessment will be developed for the performance trials in Chatham Unit No. 1 to be undertaken during Phase III. A similar program for tangentially fired units will be undertaken leading to performance trials in Chatham Unit NO. 2 of 22 MW(e) capacity. 12-14 |