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1.前言 为了适应负荷调节性能的要求,流化床锅炉在设计时所采用的操作风速逐渐增高,这样飞灰带出量也将随之增加。如设法在炉内将飞灰分离下来,则可降低锅炉原始排尘浓度,如果将飞灰再回输到炉内复燃,则可提高燃烧效率。因此,研究飞灰在炉内分离是很有意义的。 对于工业流化床锅炉,利用烟气在炉内作急剧的折转,利用烟气对炉墙和管束的碰撞都能够使飞灰有效的分离。为研究其分离特点,分析了一台双循环流化床锅炉沿烟气流程各部位分离灰的颗粒分布规律,并给出相应的结论。
1. Introduction In order to meet the load regulation performance requirements, fluidized bed boiler used in the design of the operating air speed gradually increased, so fly ash with the amount will also increase. If you try to separate the fly ash in the furnace, you can reduce the boiler raw dust concentration, if the fly ash back to the furnace re-ignited, you can improve combustion efficiency. Therefore, the study of fly ash separation in the furnace is of great significance. For industrial fluidized bed boilers, the use of flue gas in the furnace for a sharp turn, the use of flue gas on the furnace walls and bundles can make the effective separation of fly ash. In order to study the characteristics of its separation, the particle distribution of ash separated from each part of a double-circulating fluidized bed boiler was analyzed and the corresponding conclusions were given.