Study On Desulphurization Technology Of Large Circulating Fluidized Bed Limestone

Recent years, the development of large-scale circulating fluidized bed boiler technology is very rapidly, burning operation control technology is very mature, and it has become the main way of poor quality fuel efficient and clean use. However, with more and more serious environmental problems, Environmental protection department of pollutant emissions mandate further requirements, The GB13223-2011"Thermal Power Plant Air Pollutants Emission Standards" ask the stringent requirements of thermal power plant emissions of SO2and other pollutants, circulating fluidized bed boiler limestone desulfurization has been severely tested.The SO2emissions of thermal power plant to200mg/m3is already close to the limit.This article based on the theoretical aspects of in-depth study of the circulating fluidized bed desulfurization mechanism, Circulating fluidized bed boiler operating conditions for the desulfurization efficiency of case and circulating fluidized bed boiler desulfurization effect on thermal efficiency; In terms of test, a series of experiments on Industrial give for high-altitude areas of the large lignite-fired circulating fluidized bed boiler, Using the control variable method research the influence of combustion conditions, calcium sulfur ratio and limestone particle size on desulfurization efficiency, The experimental studies show that changes in these factors produce different degrees of impact on circulating fluidized bed desulfurization efficiency. In the study of factors affecting the circulating fluidized bed desulfurization premise conducted SO2emission test standards, and the effects of the discharge of boiler auxiliary equipment, the targeted improvement measures proposed.In this paper, using the method of combining theory with experiment to study the circulating fluidized bed furnace limestone, Describes the mutual promotion and restrictive relationship between the various factors, By optimizing the combination of various factors of furnace limestone desulfurization can reach GB13223-2011"Thermal Power Plant Air Pollutant Emission Standards" for sulfur dioxide emission requirements, Obtained with a boiler can be made better and more economical operating conditions of desulfurization Run mode.