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目的评价微动力除尘系统在钢铁物料转运中的应用效果。方法对某钢铁公司的运焦运煤转运皮带系统、返矿运转皮带系统、烧结矿转运皮带系统、干熄焦转运皮带系统共计38套系统,加装微动力除尘器前后的粉尘监测、除尘效果和噪声强度进行比较。结果微动力除尘系统安装前后运焦运煤转运皮带系统、返矿转运皮带系统、烧结矿转运皮带系统、干熄焦转运皮带系统作业区域空气中粉尘质量浓度分别平均降低(17.1±3.5)、(19.9±4.1)、(16.4±3.1)mg/m3,前3个系统微动力除尘系统安装前后效果比较,差异有统计学意义(P<0.01)。大部分常温物料吸尘罩口无粉尘外溢现象,但对温度较高的干熄焦转运皮带安装微动力除尘系统后,除尘效果不明显。运焦运煤、烧结矿转运皮带系统中,微动力除尘与布袋除尘效果比较,差异均无统计学意义(P>0.05);微动力除尘系统与布袋除尘系统噪声强度比较[(85.2±2.0)dB(A)vs(93.9±5.2)dB(A)],差异有统计学意义(P<0.01)。结论该系统对常温物料除尘效果显著,对高温物料除尘效果较差。
Objective To evaluate the application effect of micro-dust removal system in steel material transfer. Methods A total of 38 systems were installed on a steel company, including the coke transfer coal transportation belt system, the return ore running belt system, the sinter transport belt system, and the CDQ transfer belt system. The dust monitoring and dust removal before and after the installation of micro-motion dust remover And noise intensity are compared. Results The dust mass concentration in the air of the operating area of the micromotor dust removal system was reduced by 17.1 ± 3.5 on average (17.1 ± 3.5) before and after the installation of the coke transfer coal conveyor belt system, the ore transfer conveyor belt system, the sinter conveyor belt system and the 19.9 ± 4.1) and (16.4 ± 3.1) mg / m3, respectively. There was significant difference between before and after installation of the first 3 system PMD system (P <0.01). Most of the normal temperature material dust cover no dust spillover phenomenon, but the temperature of the CDQ transfer belt installation of micro-power dust removal system, the dust removal effect is not obvious. There was no significant difference in the dust removal efficiency between the micro-motive dust removal and the bag filter (P> 0.05). Compared with the noise removal efficiency of the bag dust removal system ([(85.2 ± 2.0) dB (A) vs (93.9 ± 5.2) dB (A)], the difference was statistically significant (P <0.01). Conclusion The system of dust removal at room temperature significant effect, the dust removal effect of high temperature materials is poor.