火电机组不同脱硝方式下的运行费用分析

"十二五"期间,我国对火力发电机组NOx排放量提出了更高的约束性指标,目前火电厂的应对方式主要包括缴纳罚款、燃烧优化和建设脱硝设备等。依据《排污费征收标准管理办法》计算排污罚款;依据最新《火电厂大气污染物排放标准》、国内典型机组在燃烧优化花费以及脱硝设备运行费用等方面的统计数据,在机组不同运行工况导致不同NOx排放浓度情况下,计算典型600 MW机组的年烟气及NOx排放量,对比无减排措施、燃烧优化、SCR脱硝以及燃烧优化与SCR结合应用情况下的花费。计算结果表明,目前情况下火电机组实施燃烧优化是最经济的减排NOx方式。

Analysis of operation costs of thermal power units with different denitration methods

During the Twelfth Five-Year Plan,China has put forward higher restriction on thermal power units about NOx emissions.At present,the main methods adopted by power plants include paying the penalty,combustion optimization and constructing denitration facilities and so on.Emission penalties are calculated according to the Management Method of Collection Standard for Emission Penalty.According to the newest Emission Standard of Air Pollutants for Thermal Power Plants and statistical data including costs of combustion optimization and operation costs of denitration facilities in domestic typical units,flue gas and NOx emissions of typical 600 MW unit is calculate under different NOx emission concentrations in different operation conditions.Comparision is made among costs of no NOx removal measure,combustion optimization,denitration by SCR and combination of combustion optimization and SCR.The calculation results show that,at the moment,combustion optimization is the most economical way for thermal power units to adopt to reduct NOx emissions.