燃煤电厂选择性催化还原脱硝系统运行成本  

Analysis on operation cost of SCR system in coal-fired power plant

作　　者：杨航[1] 郑成航[1] 金侃[1] 张军[1] 张涌新[1] 翁卫国[1] 吴学成[1] 高翔[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2017年第2期363-369,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家杰出青年科学基金资助项目(51125025);浙江省重大科技专项计划资助项目(2014C03018);中央高校基本科研资助项目(2014QNA4010)

摘　　要：针对燃煤电厂选择性催化还原(SCR)脱硝系统,提出基于费用效益分析方法的脱硝运行成本评估体系和计算模型,研究典型机组的SCR脱硝系统运行成本.结果表明,在机组年运行小时数为5 000h,入口NOx质量浓度为400mg/m3时(基准含氧量6%),容量分别为300、600和1 000 MW机组的SCR脱硝系统运行成本分别为7.6~8.6、5.75~6.55和4.8~5.4元/(MW·h);入口质量浓度从200mg/m3分别增加至400和600mg/m3时,总成本中还原剂成本增幅最大,分别为195.9%和391%;当达到超低排放标准限值时,300、600和1 000 MW机组的SCR脱硝系统运行成本相比达到新标准排放限值时分别增加约9.64%、9.68%和9.8%;机组年运行小时数从4 000h增加至6 000h时,300、600和1 000MW机组的SCR脱硝系统运行成本分别降低约28%、26%和26.2%.An operation cost assessment system and calculation model of selective catalytic reduction（SCR）system in coal-fired power plant was established based on cost-benefit analysis.The operation cost of SCR system in typical unit was investigated.Results show that the operation cost of SCR system in large capacity unit is lower than that in small capacity unit.When the annual operation hours are 5 000 hand NOxinlet concentration is 400mg/m3（the oxygen content of base condition is 6%）,the operation cost of SCR system in typical 300,600 and 1 000 MW power unit are among 7.608.60,5.756.55 and 4.805.40yuan/MW·h,respectively.When the NOxinlet concentration increases from 200mg/m3 to 400mg/m3 and to 600mg/m3,the reductant cost in the total operation cost has the largest increase,by 195.90%and 391.00%,respectively.When the emission is up to ultra-low emission standard,compared to the GB13223-2011 standard,the operation cost of 300,600 and 1 000 MW increases by 9.64%,9.68% and9.80%.When the annual service hours increase from 4 000 hto 6 000 h,the operation cost of 300,600 and 1 000 MW decreases by 28.00%,26.00% and 26.20%.

关 键 词：燃煤电厂 SCR脱硝系统 运行成本 机组容量 入口浓度 排放标准 年运行小时 

分 类 号：X324[环境科学与工程—环境工程]