余热锅炉带辅助蒸汽加热的高压下降管集箱优化设计  

Optimum Design about an Auxiliary Steam Heating Pipe System in The Header of Hrsg

作　　者：张敏丽 张巍 许银 程稚 ZHANG Minli;ZHANG Wei;XU Yin;CHENG Zhi(MHPS Dongfang Boiler Co.,Ltd.,Zhejinag Jiaxing 314036,China)

机构地区：[1]东方菱日锅炉有限公司,浙江嘉兴314036

出　　处：《燃气轮机技术》2018年第1期70-72,共3页Gas Turbine Technology

摘　　要：在余热锅炉高压蒸发器系统中的集箱部位加装一套辅助蒸汽加热管系,对高压锅筒进行预热,能很好地降低启动时高压锅筒的热应力,加快机组的启动速度。针对原有集箱蒸汽加热系统汽、水混合不均匀,热胀差大的设计结构缺陷,进行了相应的结构优化设计。通过跟踪实际项目的运行情况发现,优化后的集箱加热管系能够有效减小余热锅炉冷态启动到满负荷启炉运行时间,从原来的6 h降到4 h,经济效益明显。Adding an auxiliary steam heating pipe system in the header of HP EVAP.system of HRSG to preheat the HP drum can reduce the thermal stress of HP drum and speed up the start-up time when the HRSG is started.Aimed at the nonuniform mixing of steam and water and the design defects about poor thermal expansion in the steam heating system of header,we carried out an structural optimized design.After tracking the actual project,we found that after optimizing the header heating system of HRSG can reduce the start-up time from cold start to full load.It can be reduced from 6 hours to 4 hours and makes obviously economic benefits.

关 键 词：余热锅炉 集箱 加热系统 结构优化 启动时间 

分 类 号：TK478[动力工程及工程热物理—动力机械及工程]