1025t/h锅炉高温过热器超温分析及改造  

Analysis and Improvement for the Overheating of High-Temperature Superheater in a 1025t/h Power Station Boiler

作　　者：陆方[1] 罗永浩[1] 许琦[2] 卞韶帅[1] 郑民牛[2] 王孟浩[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]谏壁发电厂,镇江212000

出　　处：《动力工程》2003年第6期2769-2772,共4页Power Engineering

摘　　要：通过应用热偏差理论对国产1025t/h电站锅炉高温过热器超温问题进行分析研究发现;超温的根本原因是沿炉宽烟气侧热负荷分布与蒸汽流量分布不匹配。针对该炉型的特点提出改造方案,不仅降低了高温过热器外圈管出口汽温,同时减少了减温水量,提高了过热蒸汽出口温度。改造后测得的汽温值与计算值吻合得较好。According to the analysis for the overheating of hightemperature superheater in a 1025t/h utility boiler through the heat deviation theory, the discord between heat load distribution on gas side and flow distribution on stean side across the furnace width is the main reason for causing overheating. A retrofit proposal for the special boiler type has been implemented, and output steam temperature of outer tube loop was dropped, the flow of desuperheater spray was also decreased, the output steam temperature of superheater was rised. The steam temperature value of calculation well agreed with ones of measurement after retrofit.Figs 9 and refs 4.

关 键 词：电站锅炉 高温过热器 超温 热偏差 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]