Fluidized Bed Combustion Industrial Application Demonstration Projects Multi-Solids Fluidized-Bed Combustion Quarterly Technical Progress Report July 1 - September 30, 1978

摘要

A subscale experimental unit has been designed and constructed and used to develop design information for a 40,000 lb/hr demonstration industrial steam generator using an advanced fluidized-bed combustion process. Nominal design for the subscale unit is a firing rate of 400 lb coal per hour and a bed cross section of approximately 2 square feet.nExperimental operation of the Subscale Experimental Unit System and the 6-inch process development unit has shown that few of the process parameters investigated have a major effect . on sulfur capture. The exception is freeboard temperature, as an increased freeboard temperature in the 6-inch unit dramatically improved the sulfur capture. Two process conditions remain to be examined. Preparation of the 30 percent design of the demonstration facility is proceeding and will be completed in mid-October. The chosen configuration includes a round, refractory-lined combustion chamber, twin cyclones to disengage the entrained bed, and an external heat exchanger (to extract heat from the entrained bed) using horizontal heat exchange tubes.