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针对目前烧结机尾惯性+布袋两级除尘系统存在的破袋及壳体磨损问题,利用CFX软件对百叶式惯性除尘器内部气相流场进行数值模拟。结果表明:惯性除尘器内部灰斗中气流速度偏高,达10m/s,易引起二次扬尘;含尘气流对壳壁的高速冲击是引起壳壁磨损的主要原因;含尘气流在惯性除尘器的出口发生偏流导致布袋除尘器大烟道斜板磨损严重。根据模拟结果提出了针对性的改进措施,并对改进后的百叶式惯性除尘器进行了数值模拟,结果表明:改进后的除尘器内部气流分布得到了优化;改进后的除尘系统运行良好,破袋及磨损现象得到明显改善。
Aiming at the problems of bagging and shell abrasion existing in inertia + bag dusting system at the tail end of sintering machine, CFX software was used to simulate the gas flow field inside the louver inertial dust collector. The results show that the airflow velocity in the hopper of the inertial dust collector is high, reaching 10m / s, which can easily lead to the secondary dusting. The high velocity impact of the dusty air flow on the shell wall is the main cause of the shell wall wear. Deviation occurs at the outlet of the device leading to heavy wear of bag filter large chimney ramp. According to the simulation result, some improvement measures are put forward, and the improved blind type inertial dust collector is numerically simulated. The results show that the airflow distribution in the improved dust collector is optimized. The improved dust removal system works well. Bags and wear have been significantly improved.