一种燃煤电站清洁高效协同余热利用系统  

A Clean and Efficient Waste Heat Utilization System in Coal-fired Power Plants

作　　者：韩宇 徐钢 杨勇平 李永毅 

机构地区：[1]国家火力发电工程技术研究中心(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2016年第21期5842-5848,6027,共7页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2015CB 51504);国家自然科学基金(51476053);中央高校基本科研业务费专项资金(2015XS78)~~

摘　　要：为进一步提高SCR脱硝温度与效率,提出了将前置省煤器布置在旁路烟道中的思路,同时还采用了深度余热利用加低低温电除尘设计,形成电站清洁高效协同余热利用系统。论文结合某典型1000MW超超临界燃煤发电机组实际数据,对新系统的热力学性能、污染物减排性能及技术经济性进行全面研究。结果表明：对于百万超超临界燃煤发电机组,新系统能够降低供电标准煤耗3.08 g/（k W？h）,在各负荷下均可提升脱硝温度16~18℃、提高脱硝效率4.0~8.5个百分点;大幅提高除尘器效率;并可降低脱硫水耗约1082.5t/天;新系统投资增加约6275.6万元,静态回收期约为6.8年,年净收益约为307.7万元,具有良好的节能效益、环保性能与经济效益。To further increase the temperature and efficiency of SCR denitration, innovative idea of arranging preposition economizer in bypass flue was put forward. Meanwhile, a clean and efficient waste heat utilization system, which combined in-depth waste heat utilization and low-low temperature ESP, was proposed. Based on the actual data of a typical 1000 MW coal-fired ultra-supercritical unit, thermodynamic, pollutant emission reduction and economic performance of the proposed system were comprehensively researched. The results indicate that, for 1000 MW coal-fired ultra-supercritical units, the proposed system can reduce the standard coal consumption by 3.08 g/（k W？h）, while increase the denitration temperature and efficiency by 16-18℃ and 4.0%-8.5% respectively. The proposed system can also increase the efficiency of ESP remarkably, and reduce water consumption of desulfuration by 1082.5 t/d. Regarding economic performance, the additional investment of the proposed system is approximately 62.756 MCHY. The static payback period is 6.8 years and the net income is 3.077 MCNY per year. Overall, the proposed system presents great energy-saving effect, excellent environmental protection performance and considerable economic benefit. The research results of this paper provide innovative integration idea and technique option for achieving the great-leap-forward development and the goal of clean and efficient of coal-fired

关 键 词：燃煤电站 清洁高效协同 余热利用 热力学分析 污染物减排 技术经济性能 

分 类 号：TK115[动力工程及工程热物理—热能工程]