大容量CFB锅炉热循环回路特征参数研究

热循环回路是循环流化床(CFB)锅炉的关键系统,其循环流动特性和热力特性直接影响CFB锅炉的安全经济运行.对CFB锅炉热循环回路的流化特征参数的密相区流化速度、稀相区流化速度、固体流率、分离器入口固气比及灰浓度,以及热力特性参数的炉膛截面热负荷、床温、炉膛及分离器燃烧份额、颗粒介留时间等重要参数进行了系统的分析研究,提出了相应的计算方法和选取原则.

STUDY ON CHARACTERISTIC PARAMETERS IN THERMOCYCLING LOOP OF LARGE-CAPACITY CFB BOILERS

The thermocycling loop is a key system of circulating fluidized bed (CFB) boiler,its circulat-ing flow and thermodynamic characters directly affect safe and economic operation of CFB boiler. The important characteristic parameters, such as fluidization rate, solids flow rate, bed temperature, and heat release rate at sectional area of the furnace etc. , have been systematically analysed and studied, and corresponding calculation method and choise principle for main characteristic parameters being put forword.