中文关键词超低排放煤电机组启动NO_x排放特征 英文关键词ultra-low emissioncoal-fired power unitstart-up processNO_xemission characteristics

作者	单位	E-mail
李辉	国电科学技术研究院有限公司, 南京 210023 国电环境保护研究院有限公司, 南京 210031	lihui850627@126.com
朱法华	国电科学技术研究院有限公司, 南京 210023 国电环境保护研究院有限公司, 南京 210031
孙雪丽	国电环境保护研究院有限公司, 南京 210031
王宗爽	中国环境科学研究院, 北京 100012
王圣	国电环境保护研究院有限公司, 南京 210031
裴杰	国电科学技术研究院有限公司, 南京 210023
谭玉菲	中国环境科学研究院, 北京 100012
薛峰	国电科学技术研究院有限公司, 南京 210023
郭敏	中国环境科学研究院, 北京 100012
郑桂博	国电龙源电力技术工程有限责任公司, 北京 100039

中文摘要 通过采集671台次燃煤火电机组NO_x排放实时监控数据，对非超低排放与超低排放机组总体及相应各等级机组启动过程中NO_x排放特征进行了对比分析.结果表明，非超低排放机组启动阶段NO_x超标率为81.53%，平均超标小时数为2.64 h，平均最大排放小时均值为284.06 mg·m^-3；超低排放机组启动阶段NO_x超标率为79.86%，平均超标小时数为2.52 h，平均最大排放小时均值为231.61 mg·m^-3；非超低与超低排放机组总体及相应各等级机组间NO_x超标率和平均超标时长无统计学意义上的差异，但平均最大排放小时均值浓度存在显著差异；非超低排放机组中，除300 MW等级机组平均最大排放小时均值浓度显著低于200 MW等级机组外，其余对比组在超标率、超标小时数及平均最大排放小时均值浓度上均无显著差异；不同等级超低排放机组之间在超标率、超标小时数和最大排放小时均值浓度上都有统计学意义上差异的情况，600 MW等级机组超标时长控制最优，1000 MW等级机组排放浓度控制较好. 英文摘要 Based on the NO_x emission information of 671 coal-fired power units, the NO_x emission characteristics of non-ultra-low-emission (non-ULE) and ultra-low-emission (ULE) coal-fired power units during the start-up process were compared and analyzed. The results showed that in the start-up stage of non-ULE units, the exceeding standard rate (ESR) of NO_x emission concentration was 81.53%, the average exceeding standard hours (ESHs) was 2.64 h, and the average maximum emission hourly mean concentration (MEHC) was 284.06 mg·m^-3. The NO_x ESR of ULE units was 79.86%, the average ESHs was 2.52 h, and the average MEHC was 231.61 mg·m^-3. There was no significant difference in the ESR and the average ESHs between non-ULE and ULE units, but the difference in the average MEHC was significant. There was no significant difference in the ESR, average ESHs, and average MEHC between different grades of non-ULE units, except that the average MEHC of 300 MW units was significantly lower than that of 200 MW units. There was statistical difference in the ESR, average ESHs, and average MEHC among different grades of ULE units, and 600 MW units performed best in the ESHs control, whereas 1000 MW units performed best in the emission concentration control.

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