600 MW燃煤机组燃烧优化调整试验研究

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英文篇名：Experimental Study on Combustion Optimization and Adjustment of 600 MW Coal-fired Unit 作者：邢振中 英文作者：XING Zhen-zhong;China Datang Corporation Science and Technology Research Institute, Central-China Electric Power Test Research Institute; 关键词：锅炉 ; 配煤方式 ; CO浓度 ; 煤粉细度 ; 运行氧量 ; 优化调整 ; 试验研究 英文关键词：boiler;;coal blending method;;CO concentration;;pulverized coal fineness;;operation oxygen;;optimal adjustment;;experimental study 中文刊名：应用能源技术 英文刊名：Applied Energy Technology 机构：中国大唐集团科学技术研究院有限公司大唐华中电力试验研究院; 出版日期：2019-09-25 出版单位：应用能源技术 年：2019 期：09 语种：中文; 页：39-43 页数：5 CN：23-1184/TK ISSN：1009-3230 分类号：TM621.2

摘要

以某厂600 MW对冲燃煤机组为研究对象,该厂进行燃烧器低氮改造后,由于运行调整不理想,在高负荷工况下出现锅炉尾部A侧CO排放浓度较高,且屏过出口蒸汽温度偏差大的问题,经过现场分析造成该现象的主要原因是炉膛内氧量分布不均所致。针对低氮燃烧器的结构和布置方式,对锅炉的煤粉细度、配风方式和运行氧量进行了优化调整,调整后高负荷工况屏过出口A/B侧汽温偏差由28.4℃降低为4.4℃,优化后空预器进口氧量A侧为3.03%,B侧为3.04%,两侧基本一致,氧量分布比较均匀,空预器进口A侧CO浓度由1924.2 ppm降低到80.3 ppm,有效的解决了锅炉左右侧燃烧偏烧和O_2分布不均匀问题。
        Take a 600 MW hedging coal-fired unit of a certain plant as the research object, after low-NOX transformation of burners, due to the unsatisfactory operation adjustment, the problem of high CO emission concentration at the A side of the boiler tail and large deviation of steam temperature at the outlet of the screen appears under high load conditions, the main reason is nonuniform distribution of oxygen in the furnace. According to the structure and disposal of low-NOX burners, the fineness of pulverized coal, the air distribution mode and the operating oxygen of the boiler are optimized and adjusted, After adjustment, the steam temperature deviation at the A/B side of the screen outlet under high load condition decreases from 28.4 ℃ to 4.4 ℃, and the oxygen input of rear air preheater is 3.03% on the A side and 3.04% on the B side after adjustment. The oxygen distribution is basically the same on both sides. The CO concentration at the A side of the air preheater inlet is reduced from 1924.2 ppm to 80.3 ppm, which effectively solves the burning deviation and the problem of O_2 uneven distribution on both sides of the boiler.

引文

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