前后墙对冲燃烧锅炉降低飞灰含碳量的燃烧调整试验

分析了浙江浙能长兴发电有限公司3号锅炉飞灰含碳量升高的原因,指出磨煤机研磨能力下降、煤粉过粗、煤粉浓度分配不均匀以及局部缺氧燃烧等是主要原因;介绍了针对巴威DRB-XCL旋流燃烧器的特点,通过采取调整燃烧器调风盘、内、外二次风叶片角度以及提高炉膛氧量等措施,从而降低锅炉飞灰含碳量2%~3%,解决了3号炉飞灰含碳量高的问题,提高了机组运行的经济性。

Combustion adjusting experiments of reducing carbon content of fly ash in opposed wall firing boiler

Because of the grinding ability of the coal pulverizers decrease, coal powder coarseness, concentration of coal powder non-uniformity and local oxygen lack combustion, carbon content of fly ash in No. 3 boiler of Zhejiang energy Changxing power generation Co. , Ltd had increased greatly. Based on the characteristics of DRB-XCL swirling burner, carbon content of fly ash in No. 3 boiler has been reduced 2 ~ 3 percentage points by adjusting sliding air dampers and inner/outer zone secondary air adjustable vanes of the burners and increasing the percent of furnace oxygen. Thus the problem of increased carbon content of fly ash in No. 3 boiler was solved and the economical efficiency of the unit was raised.