【摘要】 为了提高循环流化床锅炉机组底渣余热利用效率,提出了耦合流化床冷渣器与滚筒冷渣机的底渣余热两级利用系统并建立了该系统效率与发电量计算的数学模型,以某350 MW超临界循环流化床锅炉机组为研究对象,对其进行了性能计算分析。计算结果显示,该系统余热利用效率较高,最低为62%,最高可达96%以上;增加发电量最高可超过3.6 MW。该系统还可以缓解部分机组的凝结水流量不足的问题,对于今后建设大型循环流化床锅炉具有重要作用。更多还原

【Abstract】 In order to improve utilization efficiency of the bottom slag waste heat of circulating fluidized bed boiler units, a two-stage bottom slag waste heat utilization system coupled with a fluidized bed slag cooler and a drum slag cooler is proposed, and a mathematical model for calculating the efficiency and power generation of the system is established. Taking a 350 MW supercritical circulating fluidized bed boiler unit as the research object, the performance calculation and analysis have been carried out. The results show that the waste heat utilization efficiency of the system is relatively high, with a minimum of 62% and a maximum of over 96%. The increasing of power generation can be up to above 3. 6 MW. The system can also alleviate the problem of insufficient condensate flow in some units, and will play an important role in the construction of large-scale circulating fluidized bed boilers in the future.更多还原