多段移动床干馏炉集气结构的优化研究  

Optimization study on gas collecting structure of multi-stage moving-bed retort furnace

作　　者：吴鹏[1] 王森 王兴坤[1] 戴航[1] 苗文华[1] Wu Peng;Wang Sen;Wang Xingkun;Dai Hang;Miao Wenhua(Beijing Guodian Futong Science and Technology Development Co.,Ltd.,Beijing 100070,China)

机构地区：[1]北京国电富通科技发展有限责任公司,北京100070

出　　处：《煤化工》2024年第3期11-15,共5页Coal Chemical Industry

摘　　要：为考察移动床干馏炉内部集气结构对串气率的影响,以陕北低阶碎煤为试验对象,搭建移动床冷态试验装置,在不同进气流量下测定各层气量的流量分配比例,研究在不同位置增设集气结构对气体分布的影响。结果表明:气体经布气伞进入移动床后,有10%的气量无法通过集气主伞流出,而从卸料口泄漏导致串气。在布气伞下部0.6 m和1.2 m处、集气主伞上部0.6 m处分别增设一层集气伞,均可以降低串气比例。同时在上部与中部或中部与下部增加两层集气伞时,可以使串气率降低为0。当中部集气伞与主伞内的压差由0 Pa增加至80 Pa时,串气率由2.80%升高至5.22%,设计炉内结构时应考虑降低沿程阻力损失或者加设集气通道。To investigate the influence of the internal gas collection structure of the moving-bed dry retort furnace on the gas escape rate,a cold simulation test device for the moving bed was constructed using low-rank crushed coal in northern Shaanxi as the experimental object.The flow distribution ratio of gas in each layer was measured at different intake flow rates,and the effect of adding gas collection structures at different positions on gas distribution was studied.The results showed that after the gas entered the moving bed through the gas distribution umbrella,10%of the gas could not flow out through the gas collection main umbrella,and the leakage from the discharge port led to gas escape.Adding a layer of gas collection umbrella at 0.6 m and 1.2 m below the air distribution umbrella and at 0.6 m above the main gas collection umbrella respectively,the proportion of gas leakage could be reduced.When adding two layers of gas collection umbrellas in the upper and middle or middle and lower parts simultaneously,the air leakage ratio could be reduced to 0.When the pressure difference between the middle gas collection umbrella and the main umbrella increased from 0 Pa to 80 Pa,the air leakage rate increased from 2.80%to 5.22%.When designing the furnace structure,considerations should be given to reduce the resistance loss along the way or add a gas collection channel.

关 键 词：移动床 干馏炉 低阶碎煤 热解 集气伞 

分 类 号：TQ523.1[化学工程—煤化学工程]