| 转炉蒸发冷却器结垢前后数值模拟 |
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| 引用本文： | 李海英,滕军华,王宝军,张滔,姬爱民,吴海东.转炉蒸发冷却器结垢前后数值模拟[J].工业加热,2016(2). |
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| 作者姓名： | 李海英 滕军华 王宝军 张滔 姬爱民 吴海东 |
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| 作者单位： | 1. 华北理工大学冶金与能源学院,河北唐山,063009;2. 唐山钢铁集团有限责任公司,河北唐山,063016 |
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| 基金项目： | 河北省科技计划项目 (14213809D) |
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| 摘 要： | 针对转炉干法除尘系统蒸发冷却器内部结垢现象影响静电除尘器除尘效率的问题,采用FLUENT软件对蒸发冷却器内部结垢前后的速度场、压力场及温度场进行了数值模拟。研究结果表明:烟气进入蒸发冷却器后流速降低,压力逐渐增加;由于雾化水的蒸发冷却作用,烟气温度由800℃降低190℃;蒸发冷却器结垢后烟气压力场与温度场均有所改变,出口平均压力由-104 Pa降低到-229 Pa,平均温度由190℃提高到224℃;出口处烟气温度较结垢前提高了34℃,烟气温度升高导致静电除尘器入口处粉尘比电阻超出最佳电除尘器参数的范围,导致电除尘效率降低。
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| 关 键 词： | 干法除尘系统 蒸发冷却器 结垢 数值模拟 |
Numerical Simulation of the Converter Evaporative Cooler before and after Scaling |
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| Abstract: | Numerical simulations about the fume flow field, pressure field and temperature field in the evaporative cooler before and after scaling were carried out with Fluent simulation software to study the evaporative cooler scaling phenomenon's effects on the efficiency of the electrostatic precipitator. The results showed that the fume velocity decreases after flowing into the evaporative cooler and as the fume flows the pressure increases and the temperature decreases from 800 ℃ to 190 ℃ for the evaporative cooling function of the atomized water. The fume pressure field and the temperature field all change after scaling in the evaporative cooler, the mean pressure fall from-104 Pa to-229 Pa, and the mean temperature rise from 190 ℃ to 224 ℃ in the exit of the evaporative cooler. The fume mean temperature raises 34℃, which leads to the dust resistivity in the entrance of the electrostatic precipitator exceeding the scope fitting for dedusting, and reduces the efficiency of the electrostatic precipitator. |
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| Keywords: | dry dedusting system evaporative cooler scaling numerical simulation |
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