超临界350 MW机组锅炉高能水回收技术经济性分析  

Technical and economic analysis of boiler high energy water recovery for supercritical 350 MW unit

作　　者：石慧[1] 王文钢 屈杰[1] 范庆伟[1] 朱蓬勃[1] 曾立飞 薛朝囡 SHI Hui;WANG Wengang;QU Jie;FAN Qingwei;ZHU Pengbo;ZENG Lifei;XUE Zhaonan(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Huaneng Yichun Thermal Power Co.,Ltd.,Yichun 153011,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]华能伊春热电有限公司,黑龙江伊春153011

出　　处：《热力发电》2021年第9期27-31,共5页Thermal Power Generation

基　　金：中国华能集团有限公司总部科技项目(HNKJ19-H33)。

摘　　要：随着风电、水电和光电等清洁能源装机容量的迅猛发展,国内的用电结构发生较大变化,大型火电机组深度调峰运行已成为常态。机组深度调峰至较低负荷时,直流锅炉由干态转为湿态运行,由锅炉汽水分离器分离出的水直接进入凝汽器或通过排污系统排出,造成了大量的热量和质量损失,导致机组运行经济性大幅下降。本文研究分析了直流锅炉湿态运行的特点,提出2种高能水热-质回收技术方案:通过闪蒸罐回收至除氧器和通过升压泵回收至给水管道,通过Ebsilon软件计算并对比了高能热-质回收前、后的运行能耗,结果表明回收后锅炉湿态运行时机组能耗显著下降,经济性大幅提高。With the rapid development of installed capacity of clean energy such as wind power,hydropower and photo electricity,the domestic electricity consumption structure has undergone great changes.Deep peak shaving to low-load operation of large thermal power units has become normal.When the unit is deeply adjusted to lower load,the once-through boiler will change from dry to wet operation.Usually,the water separated by the boiler steam-water separator goes directly to the condenser or to the sewage system,which will cause lots of heat and mass loss.Thus,the operating economy of the unit will reduce significantly.In this paper,the characteristics of oncethrough boiler under wet operation have been researched and analyzed.Two high-energy heat-mass recovery technical solutions:through the flash tank to the deaerator and through the booster pump to the water supply pipeline have been proposed.Furthermore,the operating energy consumption before and after high-energy heat-mass recovery has been calculated and compared by Ebsilon software.The results show that,after recovery the energy consumption of the unit will reduce significantly and the economy will improve greatly.

关 键 词：超临界机组 高能水 回收 经济性 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]