一种锅炉烟气余热利用的高效循环系统分析  

A high effective circulating system for exhaust heat utilization

作　　者：孙杰[1] 尹金亮 白炎武 王冠文 闫水保[3] 张全 

机构地区：[1]河南省电力公司技术技能培训中心,河南郑州450052 [2]平顶山发电公司,河南平顶山467031 [3]郑州大学化工能源学院,河南郑州450002 [4]平东热电公司,河南平顶山467031

出　　处：《热力发电》2013年第8期22-33,共12页Thermal Power Generation

摘　　要：国内50～1 000MW电站锅炉烟气余热利用于凝结水系统,其转换效率为19.5%～23%,根据能级原理,提出了一种深度利用烟气余热和减少回热抽汽损失、实现锅炉排烟温度自动控制的高效循环系统方案。热力学分析表明,此方案可使1 000MW机组无煤附加功率由0.6MW增加至20.125MW,全厂净效率提高0.9%,投资回收期小于2.0年,具有良好的节能减排、降低发电煤耗的作用,并对新建和老机组设计优化提出了原则性的建议。At present,the exhaust heat from boilers in domestic 50to 1 000 MW units is used in condensation systems,and the heat conversion rate is between 19.5%and 23%.According to the energy level theory,a high effective circulating system was put forward,which can realize automatic control of the exhaust temperature,take full use of the exhaust heat,and reduce the regenerative steam loss.The thermal dynamic analysis showed that,after this scheme was performed,the no fuel added-power of a 1 000MW unit was increased from 0.6MW to 20.125MW,the unit net power was enhanced by 0.9%,and the investment recovery period was less than 2.0years.So this system has good performance on energy saving and coal consumption reduction.Finally,principled suggestions on design optimization of the newly built and old power generation units were proposed.

关 键 词：锅炉 排烟温度 能级利用 烟气余热回收 高效循环系统 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]