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为降低输煤系统中产生的小粒径粉尘质量浓度,采用空气辅助喷雾技术进行除尘.利用fluent软件建立数学模型,对空气辅助喷雾技术进行相关的数值仿真.利用多相流理论,对影响空气辅助喷雾的相关因素进行分析,得出其主要影响因素是空气速度.研究结果表明:空气相对液体的速度越大,则雾滴速度越大、喷雾角越大;空气相对液体的速度越大,则雾滴粒径越小、雾滴破碎越剧烈、液滴分布更均匀;雾滴破碎粒径与空气速度的1.14次方成反比.将确定的最佳技术参数应用于现场,降尘率达90%以上.
In order to reduce the mass concentration of small particle dust generated in the coal handling system, air-assisted spray technology was used to remove dust.The mathematical model was established by using fluent software to simulate the air-assisted spray technology.Using multiphase flow theory, The results showed that the bigger the velocity of air relative to the liquid, the larger the droplet velocity and the larger the spray angle, and the greater the velocity of the air relative to the liquid is, The smaller the droplet size, the more severe the droplet breakup and the more uniform the droplet distribution.The droplet size is inversely proportional to the 1.14th power of the air velocity.The optimum technical parameters are applied to the site, and the dust reduction rate is 90% %the above.