330MW燃煤机组锅炉炉膛结渣性能的研究

RESEARCH ON FURNACE SLAGGING OF 330MW BOILER OF DALATE POWER STATION

该文以内蒙古达拉特发电厂3号锅炉为研究对象,针对其炉膛结渣问题,采用炉膛分区段热力计算方法,研究锅炉在设计煤种、高负荷运行时,投用不同层燃烧器和燃煤量,得出9种较为符合实际运行并可减轻结渣的燃烧工况;分析锅炉高负荷运行时改变煤种,投用一、三层燃烧器,每层依次投入总煤量的70%、30%时,各区段烟温和炉膛断面热负荷的分布情况。两种计算结果显示:达拉特发电厂燃用煤基本为严重结渣煤,容易引起炉膛、折焰角、过热器等处结渣。并采用了RTSQ综合判别法对达拉特发电厂16种煤进行了研究。结果表明:达拉特发电厂燃用煤与B&WB1025t/h锅炉炉型不匹配,引起炉膛多处结渣,最后提出了减轻结渣程度的设计与运行措施。

Based on thermal calculation and analysis of the No.3 boiler furnace of Dalate Power Plant in Inner Mongolia, the average gas temperature and the cross-section heat flux in each section from bottom to top of the furnace have been obtained under the high load operation condition. The dependence of different combination of four layers of vortex burners with variations of coal admitted to each layers on the furnace performance are predicted, finding 9 kinds of ways to reduce slagging. The slagging location can be found from the calculation results, the results show: the coal of Dalate Power Plant is heavy slagging, causing furnace、nose、 super heater et al to slag, it is not accord with B&WB1025t/h boiler, which is in general agreement with the observation. The measures to reduce the furnace slagging are proposed.