【摘要】 煤粉予燃室是一种新型的煤粉燃烧方式。北京锅炉厂制造的 ＳＨＦ－２０／１３型锅炉在 采用煤粉予燃室后，锅炉炉膛体积热负荷高达 ２４０ｘ１０３［大卡／米３时］，锅炉外形尺寸大 为缩小，约可节省钢材３５％。 煤粉予燃室经过改进，采用了Ⅱ 、Ⅲ型予燃筒，３５°平面叶片旋流器并加装风粉均 匀板，在燃烧灰熔点高的烟煤时，已可连续运行１５天以上。试验研究说明煤粉予燃室 是可能很有前途的。更多还原

【Abstract】 Pulverized-coal-fired precombustion chamber is a kind of new coal burning equip- ment. By using two precombustion chambers in the boiler SHF-20/13 made by the peking Boiler works,the volumetric heat releasing rate of the furnace has attained the value of 240 x 103 kcal/m3h, the dimensions of the boiler are greatly reduced, the weight of the steel used is reduced about 35 percent. After careful observations in a series of experiments, the following improvements are made: modification of the construction of the chamber using Ⅱ and Ⅲ type chambers; using a new swirler of smaller attack angle; adding a mixing plate in the duct to make the fuel air mixture more uniform. When some of bituminous coal is used, these improvements make the operation of the precombustion chamber rather reliable. The duration of trouble free operation has attained more than 15 days, without the trouble encountered in the experiment, the duration of operation might be still longer. The experiments show that this kind of precombustion churner is very prospective.更多还原