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首页> 美国政府科技报告 >Practical and Theoretical Study of Sintering of Coal Ash and Limestone in a Fluidized Bed Combustor
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Practical and Theoretical Study of Sintering of Coal Ash and Limestone in a Fluidized Bed Combustor

机译：流化床燃烧器中粉煤灰和石灰石烧结的实践与理论研究

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Conditions critical for sintering of the bed material in FBC boilers were investigated experimentally and theoretically. Potassium lowers the melting temperature in the CaO-SiO sub 2 -Al sub 2 O sub 3 system. This is especially important when fuels rich in alkalies like wood are used. Another critical situation is when reducing conditions are used in the bed. CaSO sub 4 is then reduced to CaS and the resultant sulfate - sulfide mixture has an eutectic region at 830 - 1200 degrees C depending on which other elements are present. Initial results from calculations using a thermodynamic model on the system CaO-SiO sub 2 -Al sub 2 O sub 3 -K sub 2 O are also reported. The liquidus temperatures obtained from such calculations do not agree very well with experimental ones. However, relative trends like the effect of additives on a specific ash composition may be evaluated by the thermodynamic model. (ERA citation 13:037253)

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