燃气比及气体流量对低温干馏炉燃烧场的影响  

Influence of the ratio of gas to air and gas flow rate on combustion field of low temperature dry distillation furnace

作　　者：田丰 闫龙[2] 范晓勇[2] 李冬[1] TIAN Feng;YAN Long;FAN Xiaoyong;LI Dong(School of Chemical Engineering,Northwest University,Xi′an 710069,China;School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China)

机构地区：[1]西北大学化工学院,陕西西安710069 [2]榆林学院化学与化工学院,陕西榆林719000

出　　处：《化工科技》2021年第3期16-23,共8页Science & Technology in Chemical Industry

基　　金：国家自然科学基金项目(21663034);陕西省技术创新引导专项项目(2019CGHJ-11)。

摘　　要：在煤低温干馏过程中燃烧过程的诊断及控制对于提高干馏效率,减少污染物排放有着至关重要的意义。以工业上所使用的10万t/a SJ低温干馏方炉为研究对象,采用Fluent软件对SJ低温干馏炉内燃烧场进行仿真模拟。通过改变燃气比以及气体流量研究其对干馏炉燃烧场的影响,结果表明,随着燃气比的增加,干馏炉内的最高温度和最高压力均呈现出先增加至峰值而后减小至稳态的趋势;随着气体流量的增加,干馏炉内的最高温度逐渐减小,而干馏炉内的最高压力逐渐增大。最优的工艺条件根据温度分布应该具有高占比的最佳温度区间以及低占比的高温区域这一规律确定,最终选择燃气比为1.8,气体流量为14000 m^(3)/h,可以更好地提高干馏效率。The diagnosis and control of the combustion process during the low-temperature carbonization of coal is of vital importance for improving the efficiency of carbonization and reducing pollutant emissions.In this research,the 100kt/a SJ low-temperature dry distillation furnace(DDF)used in industry is as the research object,and Fluent software is used to simulate the combustion field in the DDF.The effect of the gas ratio and gas flow on the combustion field of the DDF was studied.It can be seen that with the increase of the gas ratio,the maximum temperature and the highest pressure in the DDF first increase to a peak and then decrease to a steady-state.As the gas flow increases,the maximum temperature in the DDF gradually decreases,and the highest pressure in the DDF gradually increases.The optimal process conditions are determined according to the rule that the temperature distribution should have the best temperature range with high proportion and the high temperature range with low proportion.The final technological conditions are as follows:gas ratio is 1.8 and gas flow rate is 14000 m^(3)/h,then the efficiency of dry distillation is improved.

关 键 词：低温干馏 燃烧场 燃气比 气体流量 

分 类 号：TQ[化学工程]