Data for: Research and application of bag filter system for railway ballast bed coal suction vehicles

The current bag filter system used by railway ballast bed coal suction vehicles for cleaning coal dust from railway tunnels has low operational efficiency and generates significant volumes of dust. This paper describes a simulation test unit designed to enhance the dust removal performance in railway tunnels. The flow field inside the simulation test unit is investigated under different operating conditions through numerical simulations, and the variations in air volume and working resistance, total dust collection efficiency, and optimal operating parameters of a pulse cleaning system are identified through a series of experiments. The numerical results show that the pulse cleaning system does not significantly affect the uniformity of the flow field distribution at the bottom of the filter cartridge during the process of operation. The experimental research indicates that the simulation test unit satisfies the design requirements, achieving an average total dust removal efficiency of 99.93%. A field application shows that the total dust mass concentration at the operator position can be reduced from 335.8 mg.m−3 to 4.2 mg.m−3, effectively improving the operating environment within the tunnel.

当前用于清理铁路隧道内煤粉的铁路道砟吸煤车所采用的袋式除尘系统（bag filter system），存在作业效率低下且产生大量粉尘的问题。本文介绍了一款为提升铁路隧道除尘性能而设计的模拟试验装置（simulation test unit）。本研究通过数值模拟，探究了该模拟试验装置内部流场在不同工况下的分布特征；并通过一系列实验，明确了脉冲清灰系统（pulse cleaning system）的风量、工作阻力、总集尘效率的变化规律以及最优运行参数。数值模拟结果表明，在运行过程中，脉冲清灰系统对滤筒底部流场分布的均匀性无显著影响。实验研究显示，该模拟试验装置满足设计要求，总除尘平均效率可达99.93%。现场应用结果表明，操作人员作业点位处的总粉尘质量浓度可从335.8 mg/m³降至4.2 mg/m³，有效改善了隧道内的作业环境。