富氧助燃蓄热式钢包烘烤的数值模拟
Numerical simulation of regenerative ladle preheating assisted by oxygen-enriched combustion
王立鹏 1张占伟 2李梅娟 1陈雪波1
作者信息
- 1. 辽宁科技大学电子与信息工程学院,辽宁鞍山 114051
- 2. 大连新瑞晨环保科技有限公司,辽宁大连 116001
- 折叠
摘要
钢包烘烤作为炼钢生产中的一个重要环节,其能耗和NO,排放水平对整个生产流程的节能减排效果具有重要影响.因此,为了研究富氧助燃对蓄热式钢包烘烤过程的影响,首先借助SpaceClaim软件建立钢包三维模型,采用数值模拟的方法,基于标准k-ε湍流模型、组分输运燃烧模型和DO辐射模型,建立了蓄热式钢包烘烤的气体燃烧、流动与耦合传热的多场耦合数学模型.然后根据所建模型,利用有限元分析软件ANSYS Fluent 2024 R1,模拟氧气体积分数为21％、24％、27％、30％、33％和99％时钢包内的燃烧场,并分析不同氧气含量条件下钢包内部流体流动特征、燃烧温度场和NOx含量的分布情况,同时对钢包内衬温度分布及其升温速率进行讨论.结果表明,在数值模拟设定的边界条件下,采用富氧助燃不仅能够提高钢包烘烤的火焰温度,而且能够加快钢包烘烤速率、提高燃烧效率、节约煤气.因此,将蓄热式燃烧技术与富氧助燃结合进行研究,以期对钢包烘烤工艺的改进提供一定的参考.
Abstract
Ladle baking,a pivotal component within the steel production process,exerts a profound influence on the overall energy consumption and emission profiles of the entire manufacturing cycle.Therefore,in order to investi-gate the effect of oxygen-enriched combustion on regenerative ladle baking process,a three-dimensional model of the ladle was firstly established with the help of SpaceClaim software.Numerical simulation was used to establish a multi-field coupled mathematical model of combustion,flow and heat transfer based on the standard k-e turbulence model,species transport model,and DO radiation model.Based on the established model,the finite element AN-SYS Fluent 2024 R1 was used to numerically simulate the combustion field of oxygen at volume fractions of 21％,24％,27％,30％,and 99％inside the ladle,and analyze the distribution of flow field,temperature field,and NOx in ladle under different oxygen concentrations.The analysis results show that under the numerical simulation condi-tions,oxygen-enrichment combustion can not only increase the flame temperature of the ladle heating,but also has the characteristics of high combustion efficiency,fast heating speed and saving gas.Therefore,the combination of oxygen-enriched combustion and regenerative baking technology is studied in order to provide reference for the im-provement of ladle baking technology.
关键词
钢包烘烤器/富氧助燃/燃烧场/多场耦合数学模型/数值模拟/节能降耗Key words
ladle heater/oxygen-enrichment combustion/combustion field/multi-field coupled mathematical model/numerical simulation/energy saving and consumption reduction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据