Measurement of Sulfate Aerosols from Western Low-Rank Coal-Fired Boilers with FGD: Results of Tests at Coal Creek Unit 1

摘要

This test was part of a program to investigate the quantity and type of aerosol sulfates emitted from Western low-rank coal-fired utility boilers with flue gas desulfurization systems. The average particulate removal efficiency of the module tested was 79%, as calculated from the instack filter results. The absolute amount of sulfate was roughly the same at inlet and outlet. The impactor total mass loading results are in fair agreement with those measured with the instack filters. The size dependent particulate removal by the scrubber may be characterized by the size at 50% collection efficiency, or cut point of the scrubber. The cut point is about 1.5 micrometers physical diameter. The average SO sub 2 removal efficiency of the FGD module was 95%, based on the wet chemical SO sub 2 measurements. On the average, based on the instack filter results, 13% of the particulate mass loading at the inlet was sulfate. At the outlet, this fraction increased to 33%. (ERA citation 07:004022)