超超临界机组实施给水加氧处理的可行性  

The feasibility of feed water oxygenation treatment in ultra-supercritical unit

作　　者：黄校春 徐洪[2] 赵益民 

机构地区：[1]国电泰州发电有限公司,江苏泰州225327 [2]江苏方天电力技术有限公司,江苏南京211102

出　　处：《中国电力》2011年第12期51-54,共4页Electric Power

摘　　要：国电泰州发电有限公司(泰州电厂)超超临界发电机组在投产后由于水冷壁管节流孔沉积氧化物,使得超温现象时有发生,存在爆管隐患。理论上认为,给水加氧处理是防止带节流孔垂直管屏水冷壁超温爆管的有效措施,为此分析了泰州电厂超超临界机组给水加氧处理的可行性。在确认给水加氧可行的基础上,对机组水汽品质做了进一步查定,以确保给水加氧试验的成功。详细介绍了泰州电厂加氧试验的情况,试验结果表明,超超临界机组实施给水加氧是可行的。给水加氧后,给水含铁量得到了控制,降低了腐蚀产物在水冷壁进口节流孔板处的沉积,运行安全得以保证;同时,降低了运行成本,延长了锅炉的化学清洗周期,经济效益显著。For the water wall tube orifice deposition oxide, the over-temperature situation occurred occasionally in the ultra-supercritical units of Guodian Taizhou Generating Co., Ltd （Taizhou Power Plant）, And the over-temperature situation will easily caused explosion of the heat tube. For the ultra-supercritical units with the orifice of the vertical water wall tube panel, in theory the efficient anti-explosion strategy was feed water oxygenation treatment. The feasibility of feed water oxygenated treatment for the uhra-supercritical units in Taizhou Power Plant was analyzed. On basis of the viable water oxygenated treatment, the further investigation of the vapor quality in the unit was achieved, to ensure the success of water oxygenated treatment. The water oxygenated treatment test in Taizhou Power Plant was introduced in detail. The test results show that the implementation of uhra-supereritical units is feasible in water oxygenated treatment. After water oxygenated treatment, the iron content of water was controlled. The import of corrosion products in water-wall deposition at the throttle plate was reduced. The safe operation was ensured. And the operating costs were reduced. The chemical cleaning cycle of boiler was extended, and the significant economic benefits were gained.

关 键 词：超超临界机组 锅炉 水冷壁 流动加速腐蚀 全挥发处理 给水加氧处理 

分 类 号：TM621.8[电气工程—电力系统及自动化]