Comparative Results of Multifuels Fluidized Bed Combustion Testing in Both Bubbling and Circulating Bed Modes

摘要

GA Technologies Inc. has completed more than 7500 hr of fluidized bed combustion research on a wide variety of fuels, including bituminous coal and coal refuse, petroleum coke, and radioactive and industrial wastes. These tests have been sponsored by United States and foreign government agencies; electric utilities, a number of industrial firms, including chemical, oil, and primary metals companies; and a boiler supplier. Testing has been conducted in GA's 2 mm Btu/hr pilot plant in San Diego, California. This modern facility is operated either as a bubbling fluidized bed combustor or as an advanced circulating bed combustor. It is highly instrumented with a computer-based control and data acquisition system that allows accurate determination of process performance. All tests were structured to determine the most economical operating conditions for maximizing combustion efficiency while minimizing emissions such as SO sub 2 , CO, NO/sub x/, and HCl. Results to date conclusively indicate inherent advantages to the circulating bed mode of combustion in all of these performance criteria. These advantages are mostly due to the increased turbulence, mixing, recycle, and throughput in the circulating bed as well as to the mechanical difficulties associated with operation of a bubbling fluidized bed. (ERA citation 09:020618)