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凝聚结团现象是煤水混合物流化床燃烧取得高效率的基础,本文通过实验考察了各有关因素对煤水混合物凝聚结团过程的影响。研究表明,床温对凝聚结团过程有十分重要的影响,当床温较低时,煤水混合物的结团状况随床温的降低而迅速恶化;就煤水混合物的含水量而言,存在一最佳范围,过低或过高的含水量都将使结团状况恶化;煤水混合物中原煤的颗粒度过大也会使结团质量变差;相比之下,凝聚结团过程受投入粒度的影响则较小。根据初步的实验资料似乎可以认为,所谓凝聚结团过程实质上是煤水混合物在高温流化床内的快速成焦过程。
The phenomenon of agglomeration and agglomeration is the basis of high efficiency of fluidized bed combustion of coal-water mixture. In this paper, the influence of various factors on the agglomeration process of coal-water mixture is investigated. The results show that the bed temperature has a very important influence on the agglomeration process. When the bed temperature is low, the agglomeration of the coal-water mixture deteriorates rapidly with the decrease of the bed temperature. In terms of the water content of the coal-water mixture, An optimal range, too low or too high a water content will make the agglomeration of the situation worse; coal-water mixture in the coal is too large will result in caking quality deterioration; In contrast, agglomeration process by The impact of input granularity is smaller. According to the preliminary experimental data, it seems that the so-called agglomeration process is essentially the process of rapid coke formation of the coal-water mixture in a high-temperature fluidized bed.