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为揭示细颗粒粉尘与雾滴粒径之间对位配置降尘规律,建立受限空间气泡雾化尘-雾粒径耦合试验系统,采用Spraytec粒度仪、直径为1.5 mm的内气外液型喷嘴等仪器,模拟风流扰动下无尘源、释放煤质尘源2种状态6种气液比(ALR)试验条件,测试研究粉尘粒径、雾滴粒径(XNS)及降尘效率之间的影响关系。数值拟合得到ALR、XNS分别与全尘效率(η)的Gompaertz、Parabola函数关系式,以及ALR、X_(NS)分别与4个粒径区间的分级降尘效率(η_(<2μm)、η_(25μm)、η_(510μm)、η_(>10μm))的Gompaertz函数关系式。模拟得出捕集呼吸性粉尘(Stokes直径d≤5μm)ALR、XNS分别为0.4~0.6、15~25μm,捕集可吸入类粉尘(5μm≤d≤10μm)ALR、X_(NS)分别为0.4~0.5、25~30μm。
In order to reveal the law of dust control in the collocation between the fine particle dust and the droplet size, a particle-diameter coupling experiment system of bubble-fog particle confined space bubble was established. The Spraytec particle size analyzer, And other instruments to simulate the dust-free source under perturbation of wind flow and release of 6 kinds of gas-liquid ratio (ALR) test conditions of coal dust source, and to study the influence of dust particle size, droplet size (XNS) relationship. The relationship between ALR and XNS and the Gompaertz and Parabola functions of full dust efficiency (η) and the grading efficiency (η_ (<2μm), η_ ( 25 μm), η_ (510 μm), η _ (> 10 μm)). The ALR and XNS of trapping respirable dust (Stokes diameter d≤5μm) were simulated. The ALR and XNS were 0.4 ~ 0.6 and 15 ~ 25μm respectively. The ALR and X_ (NS) of respirable dust (5μm≤d≤10μm) ~ 0.5, 25 ~ 30μm.