在惰性物质的流化床中煅烧分散的石灰石。2. 数值模拟结果

V. Kolesnyk, V. Orlyk, Yu.I. Khvastukhin, K. Kostohryz, V. Zhaivoronok
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引用次数: 0

摘要

本文给出了石灰石小颗粒与惰性颗粒物料流化床气相接触煅烧制备高性能吸附剂的数值实验结果。当流化床气相温度在900 ~ 1200°С范围内变化时,高反应区初始粒径为80 ~ 200 nm、初始孔隙度e0 = 0,03 ~ 0,1、初始孔隙度dpo = 3,84 ~ 17 nm的石灰石停留时间不同,所得吸附剂的基本定性参数——垂度、比表面积、质量的变化特征也不同。所获得的结果允许在设计阶段进一步确定焙烧过程的最佳硬件和工艺设计,取决于石灰石的初始参数,这将根据给定的功率装置提供所需的石灰石吸附剂质量。圣经1,图10
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CALCINATION OF FINELY DISPERSED LIMESTONE IN A FLUIDIZED BED OF INERT MATERIAL. 2. NUMERICAL SIMULATION RESULTS
The results of numerical experiments concerning the process of calcination of small grained limestone particles in contact with the gas phase of a fluidized bed of inert grainy material for obtaining a high-performance sorbent are given. The character of the change of the basic qualitative parameters of the obtained sorbent – droopiness, surface area, mass is presented depending on the time of residence of the initial limestones with a diameter of 80–200 nm with initial porosity e0 = 0,03–0,1 and pore diameter dpor = 3,84–17 nm in the high-reaction zone when the temperature of the gas phase of the fluidized bed is changed within 900–1200 °С. The obtained results allow further in the design stage to determine the optimum hardware and process design of the process of calcination, depending on the initial parameters of the limestone, which will provide the desired quality of the limestone sorbent in accordance with the given power installation. Bibl. 1, Fig. 10.
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