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circulating fluidized bed combustable technology applied in central heating boiler

 circulating fluidized bed combustion technology applied in furnace Essay

п»їDuring fluidized foundation combustion potassium and calcium mineral from biomass ash can react with quartz (SiO2) from the pickup bed sand currently at the regular operation conditions of 700в€’900 В°C, creating a coating of California, K-silicate on to the bed particle. The coating becomes fuller in time, as well as the particle size increases. The layer can be sticky, as well as the bed particles can agglomerate together raising the bed molecule size even more. During unsteady operation of the boiler, or on an periodic excursion to high temperature, the full bed may sinter. Your bed agglomeration may be controlled keeping the bed radical contents low enough simply by regularly discharging the bed lung burning ash and feeding fresh crushed stone into the understructure. The biochemistry of energy ash - bed yellow sand interactions is however complicated. It is usually useful to minimize the quartz items in the make-up sand. The ash melting point temps of hard woody fuel ashes vary in a wide range. The broad range correlates with variations in ash composition. In general, the higher the gas alkali and chlorine material, the lower are definitely the sintering and initial deformation temperatures. Solid wood ash starts to form agglomerates and to sinter between 900 ВєC and 1000 ВєC in combustable conditions. Fossil fuel and peat moss ashes are often trouble free for these conditions, even if the burning point temps are inside the same selection with biomass fuels. Fossil fuel or peat moss is co-fired with biomass in many multi-fuel fired boilers. The woody biomass ashes are generally much more reactive than the ashes of non-renewable fuels. Lower reactivity of fossil fuel and peat moss ashes is connected to a composition with mainly quartz and various silicate-based nutrients, like aluminium silicates, calcium silicates and alkali silicates, and iron oxides. Calcium mineral and ing kali in these minerals are not in cost-free, reactive type like they may be in biomass ashes. Consequently they are quite inert on the conditions of fluidized bed combustion. Though combustion of woody biomass fuels is far more challenging in comparison to coal...

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