循环流化床锅炉掺烧焦炉煤气的改造

Modification of Oven Gas Blended with Coal Firing in CFB Boiler

循环流化床锅炉是煤粉在特殊的流化状态下燃烧并产生蒸汽的设备。而焦炉煤气和煤粉是两种形态完全不同的燃料,其燃烧过程和机理存在着很大的差异。在循环流化床锅炉中即燃烧煤气,又不影响煤粉正常循环流化和燃烧,保证锅炉额定出力,是锅炉改造中必须解决的问题。通过热平衡方法确定了75 t/h循环流化床锅炉掺烧焦炉煤气的最大掺烧量,并就掺烧煤气后对锅炉性能及运行的影响进行了分析讨论。掺烧焦炉煤气锅炉改造工程为能源的再利用提供了有效途径。

CFB boiler is an apparatus in where steam is generated, coal burnt in furnace under control of the special fluidized condition. Oven gas and coal are quite difference in form, combustion process and mechanism. It is question should be solved that the fuel combined oven gas with coal were fired in CFB boiler without any influences for the normal circulation, combustion and rated capacity. The maximum quantity of oven gas mixed into 75 t/h CFB boiler fired coal is determined by the principle of heat balance. This article discusses the effect to the performance and operation of CFB boiler fired the combined of oven gas and coal. Modification of firing the blended oven gas and coal in boiler will provide an useful method for the reusing of energy.