无烟煤循环流化床锅炉的飞灰回燃  

Fly-ash Recirculation Combustion of Circulating Fluidized Bed Boilers for Anthracite

作　　者：谢伯达[1] XIE Bo-da 

机构地区：[1]福建省电力试验研究院,福建,福州,350007

出　　处：《福建电力与电工》2005年第4期4-7,共4页Fujian Power and Electrical Engineering

摘　　要：数理分析结果表明,燃用无烟煤的循环流化床锅炉效率难以较大幅度提高,其根本原因在于:无烟煤燃料的一次烧失率较低,虽然燃料粒子经过有限的几次循环便可基本燃尽,但对于国内常用的低循环倍率锅炉,占有相当比例的、只经过极少次循环的燃料粒子,却含有较多的可燃物,它们随灰分一起由烟道排出。为减小这一部分损失,采用飞灰回燃技术是个行之有效的途径,可望获得锅炉效率的较大幅度提高,但相应带来锅炉尾部烟道灰浓度增大、受热面磨损加剧等不利影响。The mathematic-physical analyses shows that to increase the efficiency of circulating fluidized bed boilers for anthracite by a large margin is very difficult,the basic reason is as follows: the burn-out rate of anthracite particles through one time circulation is low,although fuel particles may basically get burn out after a few circulation times,with regard to domestic common boilers of low circulation rate,the combustible particles through fewer circulation times,which hold not a little quantity,remain c...

关 键 词：循环流化床 无烟煤 锅炉效率 飞灰回燃 灰浓度 受热面磨损 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]