二次再热锅炉控制工质热偏差的分析  

ANALYSIS OF HEAT DEVIATION OF CONTROL WORKING FLUID FOR TWO-REHEAT BOILER

作　　者：龙志云[1] 宋宝军[1] LONG Zhiyun, SONG Baojun(State Key Laboratory of Efficient and Clean Coal-fired Utility Boilers, Harbin Boiler Company Limited, Harbin 150046, Chin)

机构地区：[1]哈尔滨锅炉厂有限责任公司高效清洁燃煤电站锅炉国家重点实验室,哈尔滨150046

出　　处：《低温建筑技术》2018年第4期140-142,共3页Low Temperature Architecture Technology

摘　　要：为了掌握二次再热燃煤锅炉高温受热面集箱流动特性,避免因流动偏差过大而使得受热面管子超温爆管,重点介绍了高温过热器和再热器集箱静压差和流量分布规律,结果表明:集箱静压差最小位置控制在炉膛的1/4和3/4处,对于高温过热器系统,可有效控制流量偏差在2%以内、因集箱流动影响的壁温偏差可控制在4℃以内;对于高温再热器系统,可有效控制流量偏差在4%以内、因集箱流动影响的壁温偏差可控制在7℃以内。In order to master the flow characteristics of high-temperature heating surface header on, avoid overheating of the heated surface tube due to excessive flow deviation, the pressure difference and flow distribution law of the high temperature superheater and reheater header are introduced,the results show that： the minimum position control of the static pressure difference of the box at the 1/4 and 3/4 of the furnace width ,for high temperature superheater system, it can effectively control the flow deviation within 2% ,the wall temperature deviation due to the flow of collection box can be controlled within 4℃;For the high temperature reheater system,it can effectively control the flow deviation within 4%,the wall temperature deviation due to the flow of collection box can be controlled within 8℃.

关 键 词：钢纤维 玻璃纤维 全轻混凝土 抗压强度 

分 类 号：TU271.2[建筑科学—建筑设计及理论]