某台墙式燃烧锅炉严重高温腐蚀和低负荷飞灰可燃物含量高的原因分析  

CAUSE ANALYSIS OF SERIOUS HIGH TEMPERATURE CORROSION AND HIGH CONTENT OF UNBURNED COMBUSTIBLES IN FLY ASH UNDER LOW LOAD OF ONE WALL-FIRING BOILER

作　　者：牟春华[1] 张义政[1] 王春昌[2] 

机构地区：[1]华能日照电厂,山东日照276826 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2008年第7期39-42,共4页Thermal Power Generation

摘　　要：针对某台墙式燃烧锅炉严重高温腐蚀和低负荷运行飞灰可燃物含量高的问题,从旋流燃烧器的特点、燃烧器布置分式等方面进行了分析。分析结果认为,燃煤质量下降、炉内局部缺氧燃烧、锅炉设备适应能力差是造成锅炉严重高温腐蚀和低负荷运行飞灰可燃物含量高的主要原因。在燃煤质量无法保证的条件下,通过燃烧器系统的改进以减少备用燃烧器的冷却风量是解决该问题的一条可行的技术途径。Directing against the problems of serious high temperature corrosion and high content of unburned combustibles in fly ash under low load of one wall -firing boiler,analysis had been carried out from aspects of cyclonic burner features and layout mode of the burners. It was believed that the main causes leading to serious high temperature corrosion and high content of unburned combustibles in fly ash under low load of the boiler was as follows decreasing of the fuel coal quatily,burning under partial shortage of oxygen in the furnace,and bad suitability of the boiler equipment. Under condition in which the fuel coal quality can not be ensured, a feasible technical way for solving the above - mentioned problems is decreasing the cooling air amout for standby burners through retrofitting the burners system.

关 键 词：锅炉 高温腐蚀 飞灰可燃物 缺氧燃烧 冷却风 备用燃烧器 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]