The four-corner layout and tangential firing are applied in the fuel nozzles of the two DG670t/h boilers in Chongqing Power Plant.The accuracy of the positioning of the burner in the general overhaul has a direct impact on combustion stability and efficiency,and so on.After repeated explorations,a laser angular surveying instrument for the burner has been invented by means of the laser pointer,which can be applied in determinations of horizontal an-gles of avertence and dip angles,to enhance the accuracy of the surveying and ensure the accurate positioning of the burner.Its application in the related unit has brought about such advantages as higher combustion efficiency,reduc-tion in the content of combustible materials in the fly ash and better combustion stability as well as effectively sol-ving the problem of the angular surveying of the burner.%重庆发电厂两台DG670 t／h锅炉喷燃器采用四角布置、切圆燃烧，在大修中对燃烧器定位的准确性，直接影响燃烧稳定性、燃烧效率等。经过多次探索，用激光笔制作激光式燃烧器角度测量仪，进行水平偏角、垂直倾角的确定，可提高测量准确性，做到燃烧器精确定位。通过在相关机组中应用，燃烧效率有所提高，飞灰可燃物含量下降明显，燃烧稳定性大幅提高，有效解决了燃烧器角度测量难题。
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