Cold model simulation and optimization for oil shale retort with central inflow

doi:10.16085/j.issn.1000-6613.2017-1848

Abstract

Abstract: During the continual operation of oil shale gas-heat-carrier retort, the flow distribution in the furnace has a significant impact on the oil shale retorting. The more uniform the distribution of the flow field in the pyrolysis section,the more positive impact on the oil shale retorting. In this paper,cold model simulation of CFD was used on the pyrolysis section of a self-designed retort with four-layer of intake. The advantages and disadvantages of this kind structure retort were analyzed and the corresponding shortcomings were improved. This kind of four-layer central inflow retort can provide better gas-heat-carrier filling and flow distribution as a whole. The entrance form was transformed into an inlet with cross vanes,which had a positive influence on the flow distribution in the retort. In this kind of structure, there was a problem that the gas filling degree was insufficient in the local area of the gas retort. Under the premise that the total gas intake was constant, adding the edge intake cooperate with the center intake in the specific position can fill the gas-heat-carrier retort better. The gas-heat-carrier in the pyrolysis section of the improved retort was more evenly distributed and ideal. The distribution of the gas-heat-carrier in the pyrolysis section of the improved retort was more ideal.

Key words: oil shale, retort, central inflow, Fluent, improvement

摘要： 油页岩气体热载体干馏炉稳态运行过程中，炉内的流程分布对油页岩干馏具有显著影响。干馏段流程分布情况越均匀对油页岩的干馏越有利。本文对自行设计的某种四层布气的干馏炉干馏段进行CFD冷态模拟，并分析了该结构形式干馏炉的优缺点，对相应缺点进行了改进。结果表明：此类四层中心进气的干馏炉总体上可以提供较好的气体热载体充满度及热载体的流程分布。将入口形式改造为带十字导叶的入口形式对干馏炉内流程分布有积极影响。此种结构下炉膛局部区域存在气体充满度欠缺问题。保证整体进气量不变的前提下，在特定位置增加边壁进气配合中心进气可以较好地填补干馏段的热载体缺口。改进后的干馏炉干馏段气体热载体分布均匀情况更为理想。

关键词: 油页岩, 干馏炉, 中心进气, Fluent, 优化

CLC Number:

TE662

BAI Jingru, GAO Fei, LIU Zhuozhuo, SUN Canhui, WANG Qing. Cold model simulation and optimization for oil shale retort with central inflow[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1744-1752.

柏静儒, 高飞, 刘卓卓, 孙灿辉, 王擎. 中心进气式油页岩干馏炉的冷态模拟优化[J]. 化工进展, 2018, 37(05): 1744-1752.

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