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1150t/h锅炉掺烧褐煤的性能试验研究 总被引:3,自引:0,他引:3
对某电厂1150 t/h锅炉进行了山西晋北烟煤与扎赉诺尔褐煤的掺烧试验,分析了不同掺烧比例、不同煤质及不同磨煤机掺烧时锅炉的综合性能.结果表明:扎赉诺尔褐煤能够在烟煤锅炉上稳定掺烧,当混煤水分Mar<20%时,A、B、C 3台磨煤机可以同时掺烧褐煤,全厂掺烧比例最高可达40%;混煤水分对磨煤机的干燥出力有较大影响,混煤水分降低时,磨煤机干燥出力提高;A、B、C磨煤机掺烧褐煤后,锅炉主燃烧器区域温度升高,炉膛水冷壁出现局部结渣,排烟和固体未完全燃烧热损失升高,导致热效率降低约1.2%. 相似文献
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在某电厂1 000MW机组上进行了神华煤与霍林河褐煤掺烧试验,研究了褐煤掺烧比例对磨煤机最大出力、机组最大出力和机组性能的影响,在最佳褐煤掺烧比例下进行了燃烧优化试验并提出了掺烧褐煤后产生的问题及解决措施.结果表明:随着褐煤掺烧比例的增大,磨煤机最大出力逐渐降低;当褐煤掺烧比例大于40%时,机组最大出力将受到明显影响;在目前设备条件下,褐煤最佳掺烧比例为30%.在最佳褐煤掺烧比例下,额定负荷时省煤器最佳出口氧量偏置为+0.4,最佳燃尽风挡板开度偏置为-10%.通过燃烧调整,基本上解决了掺烧褐煤后炉膛结焦问题,锅炉效率提高了0.07%,NOx排放质量浓度为293.2mg/m3. 相似文献
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为减少锅炉掺烧印尼褐煤发生的燃烧及制粉系统问题,提高锅炉掺烧印尼褐煤安全运行水平,在某600MW四角切向燃烧的电站锅炉中,通过现场试验与数值模拟的两种方法,选取锅炉运行的各种典型工况,研究了印尼褐煤投运方式、掺烧比例对燃烧的影响,同时分析了磨煤机研磨褐煤时对其性能参数的影响。研究表明:相比下部燃烧器投运印尼褐煤,采用中部或上部燃烧器投运褐煤方式时,炉顶烟气温度更接近锅炉设计运行工况;相比印尼褐煤30%、70%掺烧比例,50%掺烧比例更有利于燃烧器区域燃料燃烧的稳定性;磨煤机研磨褐煤时,在风煤比例为2.3~3.0时,可控制一次风温度大于55℃,磨煤机运行安全稳定。 相似文献
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煤掺烧褐煤后将增加制粉系统、燃烧系统爆炸的可能性,炉膛易结渣.本文根据理论分析和实践经验,提出控制磨煤机出口温度,增设一氧化碳监测系统等相应措施,提高烟煤机组掺烧褐煤安全性,以期指导实际运行. 相似文献
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600MW亚临界锅炉褐煤燃烧系统设计与运行 总被引:1,自引:0,他引:1
本文通过对华能某电厂600MW亚临界燃煤机组风扇磨高水份褐煤燃烧系统的分析,结合燃烧调整和性能考核试验报告,介绍了燃煤发电机组的超临界风扇磨高水份褐煤燃烧系统设计,为今后的系统设计与运行提供了宝贵的经验。 相似文献
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风扇磨煤机是火力发电厂燃用褐煤锅炉机组直吹式制粉系统的主体设备,也适用于化工、造纸厂的动力锅炉制粉需要.它是一种完成煤的磨碎、干燥和输送等三大功能合一的高效率制粉设备.风扇磨煤机主要是由带有护板的机壳和在机壳中高速旋转的打击轮组成.打击轮的检修、拆卸由专门的装置即风扇磨煤机检修车独立完成,打击轮可以方便地拆卸和检修.分析了配备风扇磨煤机直吹式制粉系统的大型火力发电厂中磨煤机检修方式及磨煤机检修中的注意事项. 相似文献
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The total inferred reserves of lignite in India are about 3680 million t, out of which the Neyveli Lignite Field in Tamil Nadu State, South India, accounts for 3300 million t. This field is mined by the mechanized opencast method, using bucket wheel excavator-belt conveyor-spreader continuous mining technology. The lignite is mainly used for power generation. The present level of lignite production is 6.5 million t/yr. The mining of lignite at Neyveli is faced with major problems like tackling hard, abrasive Cuddalore sandstone overburden, high pressure aquifers below lignite seams and high monsoonic storm water. These problems have been successfully overcome in stages, and the mine has achieved very high capacity utilization during 1984–1985. Up to March 1985, about 83.8 million t of lignite have been mined from this field. Taking into consideration the future demand for power in the energy-starved southern region, Neyveli Lignite Corporation (NLC) plans to develop a second mine producing 10.5 million t/yr of lignite, and is also considering opening new mines to increase lignite output to 32 million t/yr by the year 2000. Measures are also being taken to maintain the environmental quality in the mining and industrial complex. 相似文献
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《Applied Energy》2003,74(3-4):323-329
In Poland, lignite is mined in open pits and four deep mines, producing totally about 60–65 million tons a year. Extracted lignite constitutes a fuel for power plants with a total installed capacity of 8833 MW, which generate some 35% of electric energy nationally. This energy is cheaper compared with that from other sources. Poland, with its huge deposits of lignite, is placed in a privileged position, for apart from at present mined deposits, which constitute only about 15% of workable reserves, some abundant areas exist, where mining working can be started. At present, the mined deposits allow us to maintain a current yearly output for the forthcoming 15 years, whereas through the subsequent 30 years, it will decline. In order to maintain supplies of lignite, which is a significant fuel in Poland, it is necessary to fully utilize deposits in the existing areas, and develop new zones where lignite occurs. 相似文献