火电机组除氧器排汽对供电煤耗率的定量影响  

Steam Discharge of Thermal Power Unit Deaerator to the Quantitative Effection of the Coal Consumption Proportion

作　　者：白博博 石奇光 沈阳 龚胜 冒玉晨 BAI Bo-bo;SHI Qi-guang;SHEN Yang;GONG Sheng;MAO Yu-chen(Institute of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090, China)

机构地区：[1]上海电力学院能源与机械工程学院,上海200090

出　　处：《汽轮机技术》2019年第2期146-150,共5页Turbine Technology

摘　　要：火电站热力除氧器的工作排汽量一般为除氧器每吨进水的1‰～3‰。一台超超临界1050MW机组热力除氧器的排汽量约为2.77t/h～8.33t/h,排汽离开除氧器也是机组热力循环的工质损失,增加机组供电标准煤耗约为0.158g/(kW·h)～0.475g/(kW·h)。对除氧器工作排汽的4种回收方案进行了热经济性的定量分析,发现采用方案Ⅰ可使机组供电标准煤耗降低0.137g/(kW·h)～0.412g/(kW·h)。若全年运行为4000h计算,年可节约标准煤为575.4t～1730.4t。若化学补水以10元/t计,则年减少的化学补水可节约110 800元～333 200元。Thermal power plant thermal deaerator leakage volume is generally per ton of water 1‰~ 3‰. Thermal deaerator leakage volume of an ultra-supercritical 1050MW unit is about 2.77 t/h~ 8.33 t/h. Steam leaving the deaerator is also a loss of working fluid in the thermal cycle of the unit. Result shows that the steam emission increases the standard coal consumption of the unit 0.158 g/(kW·h)~ 0.475 g/(kW·h). The quantitative analysis and comparison of four kinds of recovery schemes for deaerator leakage were carried out. It was found that the standard coal consumption could be reduced 0.137 g/(kW·h)~ 0.412 g/(kW·h) by I method. If the unit annual operation of 4000h, the annual savings of 575.4 ~ 1730.4 tons of standard coal. If chemical feed water is 10 yuan/t, the annual savings will be 110 800 ~ 333 200 yuan.

关 键 词：超超临界机组 热力除氧 工作排汽量 机组供电标准煤耗 

分 类 号：TK212[动力工程及工程热物理—动力机械及工程]