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20t/h正转链条炉改造为抛煤机倒转链条炉的几条措施济南锅炉厂(济南250023)李登功孙波杨明记1前言我国在80年代投入运行了一大批SHL20t/h锅炉,这些锅炉在动行了几年后暴露出一些问题。主要表现在出力不足(为锅炉额定出力的50%~70%)、热... 相似文献
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前年,我厂10t/h正转链条锅炉采用了分层燃烧技术,取得了显著的节能效果。实践证明该技术能使正转链条锅炉热效率提高10%左右,残渣含碳量可降至10%以下,出力饱满,并且具有投资少,上马快等优点,为开展锅炉节能工作开辟了新的途径。一、改造原因及分析我厂10t火锅炉是上 相似文献
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抛煤机链条锅炉是工业锅炉中比较常见的一种炉型,因其在燃烧及适用煤种上具有诸多优点,所以在国内应用比较广泛。对抛煤机链条锅炉自身所存在的缺点提出了一种改造分析。 相似文献
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一、抛煤机倒转炉排锅炉的特点及 其存在问题: 黑龙江省有许多厂矿都装有济南锅炉厂生产的10吨/时或20吨/时抛煤机倒转炉排锅炉。该炉特点是煤种适应性强,可以经济燃烧高水分祸煤、烟煤、无烟煤。对易粘结、灰熔点低的煤也较链条炉适应。此外该炉负荷适应性好,调节灵敏,因此此种锅炉仍广泛应用于小型电厂、制糖厂、造纸厂、橡胶厂、木材加工厂等生产用汽量大的单位。 但抛煤机倒转炉排锅炉也存在一些致命弱点,限制了它的广泛使用,甚至许多权威部门,尤其环保部门,因其冒黑烟、飞灰大而污染环境问题得不到解决,对抛煤机这种燃烧方式采取完全否定态度。 相似文献
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针对抛煤机链条炉热效率低、出力不足、排烟超标、环境严重的问题结合实际分析了其炉内燃烧机理及空气动力特性,并提出了改造炉内控制措施和方案。 相似文献
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The black smoke is always emitted from the chimney in the chain‐grate stoker‐fired boiler at the time of ignition at ambient temperature and restart of the combustion after temporary flameout in China. The purpose of the work is to reduce the black smoke emission. A laboratory fixed‐grate model has been used to simulate the combustion of coal in chain‐grate stoker‐fired boiler. The CO and O2 concentration in the flue gas have been measured with a flue gas analyser, and the black smoke emitted from the chimney has been screened with Charge Couple Device (CCD) video camera. Power 2# coal, sized at 5–25 mm, has been fired in the fixed‐grate model. The secondary air has been used to enhance the turbulence in the furnace after the numerical simulation. The results of experiments show that the emission of the black smoke at the time of ignition of the coal at ambient temperature is more serious than that of restart of the combustion after the temporary flameout for the case of the temperature; the secondary air is helpful for reducing the black smoke emission for enhancing the intensity of the turbulence in the furnace; selection of coal particle size is necessary, the smaller the size of the coal is, the more serious the black smoke emission is, and the effect of reducing the black smoke emission with the secondary air is more evident with smaller‐size coal. The industrial test has been employed to study the effect of the air demand. It indicates that rational stoichiometric air/fuel ratio is helpful for reducing the black smoke emission in the restart of the combustion after the temporary flameout. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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