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Effects of coke charging pattern on burden movement in COREX melter gasifier based on physical simulation
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作者 Li-hao Han Yue-hua Li +6 位作者 Li-ning Han Yan-xia Liu Wei-qing Huang Lei Cao Su-ci Qi Xin Guan Jian-lu Yuan 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2022年第6期907-913,共7页
A three-dimensional semicircle cold model of COREX melter gasifier(MG)was established,and the effects of coke charging pattern on burden movement were investigated by adopting this model.The burden flow pattern of pac... A three-dimensional semicircle cold model of COREX melter gasifier(MG)was established,and the effects of coke charging pattern on burden movement were investigated by adopting this model.The burden flow pattern of packed bed was measured with different coke charging amounts,coke charging positions,and coke sizes.The results show that the solid flow pattern presents a change from straight line type to reverse U type and finally to W type in MG with traditional coke charging,while the burden flow pattern experiences the change from straight line type to W type with platform and finally W type under center coke charging,and the solid flow pattern presents a change from straight line type to W type with platform and finally W type under intermediate coke charging.The difference demonstrates that coke charging pattern affects the uniform descending in MG to some degree.The burden in the coke charging zone keeps a straight line descending.No matter what kind of coke charging pattern is adopted,the burden residence time is shortened with the increase in coke charging amount,and the vertex of deadman decreases obviously,which is conducive to the renewal of the deadman.The appropriate coke charging amount and coke size should be well controlled at 8.7%and 5 mm,respectively.The results are useful not only in developing further understanding of solid flow in MG but also in verifying different mathematical models,particularly the coupled discrete element method with computational fluid dynamics simulation which has been increasingly used in the literature. 展开更多
关键词 corex melter gasifier COKE charging PATTERN BURDEN MOVEMENT Flow PATTERN Physical simulation
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COREX熔化气化炉布料模式对煤气流分布的影响 被引量:2
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作者 李晓清 李海峰 罗志国 《材料与冶金学报》 CAS 北大核心 2012年第4期235-241,247,共8页
布料模式决定了料床的空隙度,而料床的空隙度分布决定了煤气流的第二次分布.通过建立二维的COREX-3000气化炉煤气流动的数学模型,以Fluent软件为载体,采用多孔介质模型描述了单环布料、多环布料两种不同布料模式下的料床内的煤气流动状... 布料模式决定了料床的空隙度,而料床的空隙度分布决定了煤气流的第二次分布.通过建立二维的COREX-3000气化炉煤气流动的数学模型,以Fluent软件为载体,采用多孔介质模型描述了单环布料、多环布料两种不同布料模式下的料床内的煤气流动状况,获得了气化炉内煤气的速度场和压力场.结果表明:因布料过程在料面上发生的炉料粒度偏析造成的空隙度分布对煤气流分布的影响很大.在单环布料时,炉料堆尖处煤气流速很低,随着布料档位外移,气化炉整体压差呈现先增加后减小的趋势,拐点出现在3.0 m布料档位,可见炉料布料方式对煤气流有再分配的作用,较为适宜的布料档位为2.5~3.5 m,不宜低于2.0 m和超过4.0 m的档位.通过模拟计算获得的非均匀床层中气体流动规律的认识对COREX气化炉工艺有借鉴意义. 展开更多
关键词 corex熔化气化炉 煤气流分布 布料模式 单环布料 多环布料 数值模拟
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COREX-3000熔化气化炉料面形状预测模型
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作者 李海峰 游洋 +2 位作者 周恒 罗志国 邹宗树 《重庆大学学报(自然科学版)》 EI CAS CSCD 北大核心 2015年第2期39-44,共6页
COREX-3000熔化气化炉内煤气流分布直接影响炉内煤气利用率及炉料顺行,而布料制度是调节煤气流分布的主要手段。为探讨熔化气化炉布料模式,通过对物料在布料过程中的运动和受力分析,确定物料的落点位置并根据物料的安息角和质量守恒,建... COREX-3000熔化气化炉内煤气流分布直接影响炉内煤气利用率及炉料顺行,而布料制度是调节煤气流分布的主要手段。为探讨熔化气化炉布料模式,通过对物料在布料过程中的运动和受力分析,确定物料的落点位置并根据物料的安息角和质量守恒,建立了料面形状预测模型。在此基础上,结合数学知识和计算机技术,开发了COREX-3000气化炉的料面预测仿真软件,可预测万向布料器和DRI-flap布料器不同布料制度下形成的料流轨迹、落点位置以及料面形状,为现场选择和调整布料制度提供参考。 展开更多
关键词 corex熔化气化炉 混合布料 料面形状 数学模型
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Influence of Burden Distribution on Temperature Distribution in COREX Melter Gasifier 被引量:3
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作者 HAN Li-hao LUO Zhi-guo +3 位作者 ZHOU Xiao-lei ZHOU Heng ZOU Zong-shu ZHANG Yu-zhu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2013年第3期30-35,共6页
The temperature distribution of COREX melter gasifier was studied by using a two-dimensional 1/30 scale thermal dynamic model.A set of operating conditions,such as radial distribution of direct reduction iron(DRI) t... The temperature distribution of COREX melter gasifier was studied by using a two-dimensional 1/30 scale thermal dynamic model.A set of operating conditions,such as radial distribution of direct reduction iron(DRI) to lump coal and coke volume ratio,coke charging location,coke charging amount and coke size,were taken into account.The results show that the temperature near the wall region decreases with the decrease of the radial distribution of DRI to lump coal and coke volume ratio.The temperature with central coke charging is higher than that without central coke column.Furthermore,the temperature significantly increases with the increase of central coke charging amount.With the increase of intermediate coke charging amount,the temperature near the wall region decreases while the temperature in the intermediate region increases.The temperature increases with the increase of coke size whether charging central coke or intermediate coke. 展开更多
关键词 burden distribution temperature distribution central coke charging intermediate coke charging corex melter gasifier
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加焦方式对气化炉内气流分布的影响 被引量:4
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作者 李海峰 游洋 +3 位作者 韩立浩 罗志国 蔡九菊 邹宗树 《材料与冶金学报》 CAS 北大核心 2016年第1期12-19,共8页
布料模式决定了料床的空隙度,而料床的空隙度分布决定了煤气流的二次分布.本文建立了研究三维气化炉炉料结构和煤气流分布的物理模型和数学模型,物理模型采用热电偶测温的方法,从炉内气体温度分布信息考察了气体的流动情况,由于物理实... 布料模式决定了料床的空隙度,而料床的空隙度分布决定了煤气流的二次分布.本文建立了研究三维气化炉炉料结构和煤气流分布的物理模型和数学模型,物理模型采用热电偶测温的方法,从炉内气体温度分布信息考察了气体的流动情况,由于物理实验无法获得内部空隙度分布信息,故基于离散单元法模型,以Fluent软件为载体,利用多孔介质模型并加入用户自定义函数,通过数学模型进一步研究了不同加焦方式下气化炉内煤气流分布的影响机理,获得了气化炉内煤气的速度场和流线.物理模拟与数值模拟结果相吻合.通过模拟计算获得的非均匀床层内气体流动规律的认识对COREX气化炉加焦工艺有借鉴意义. 展开更多
关键词 corex熔化气化炉 煤气流分布 加焦模式 物理模拟 数值模拟
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