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首页> 外文期刊>Transactions of The Institution of Chemical Engineers. Process Safety and Environmental Protection, Part B >The optimization of a dust suppression and clean production scheme in a TBM-constructed tunnel based on an orthogonal experiment
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The optimization of a dust suppression and clean production scheme in a TBM-constructed tunnel based on an orthogonal experiment

机译：基于正交实验的TBM构造隧道中的粉尘抑制和清洁生产方案的优化

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摘要

This study aims to examine whether clean production can be achieved by using a ventilation dust removal system in a tunnel being constructed using a tunnel boring machine (TBM). The section between the Guizhou-Road Station and the Guipaijing Station on the No. 1 line of the Qingdao Metro was selected as the study area, and the effectiveness of a ventilation dust removal system on the diffusion distance and mean concentration of dust in the excavating area was investigated through the use of a CFD-based numerical simulation. Firstly, it was found that when the first pressure quantity, exhaust quantity, and position of the pressure inlet and exhaust inlet of the ventilation dust removal system all remained unchanged, the secondary pressure quantity corresponding to the optimal dust suppression effect was determined to be 8 m(3)/s. Next, an orthogonal experiment was performed on the position of the pressure inlet and exhaust inlet and the forced-to-absorbed airflow quantity ratio in order to examine the effect of different combinations on the dust suppression effect in the tunnel. By selecting the dust diffusion distance, mean dust concentration in the tunnel and dust-collecting efficiency as the evaluation indexes, three favorable schemes were determined, from which the optimal scheme was selected. In the optimal combination, the secondary pressure inlet and exhaust inlet were 28 m and 11 m away from the tunnel face respectively and the forced-to-absorbed airflow quantity ratio was 1.6. After the scheme's optimization, the dust diffusion distance in the tunnel was shortened considerably by 53 %, the mean dust concentration was reduced to 1.52E-06 kg/m(3), and the dust-collecting efficiency was enhanced by 13.19 %. Under these optimal conditions, a ventilation dust removal system can maximize the operational efficiency and ensure a clean air environment during any production activities. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：本研究旨在通过使用隧道钻孔机（TBM）构造的隧道中的通风除尘系统来检查清洁生产是否可以实现。贵州路站与青岛地铁1号线的贵州景景站是研究区，以及通风除尘系统对挖掘中的扩散距离和灰尘的平均浓度的有效性通过使用基于CFD的数值模拟来研究地区。首先，发现当通风除尘系统的压力入口和排气入口的第一压力量，排气量和排气入口的位置保持不变时，对应于最佳粉尘抑制效果的次要压力量是8 m（3）/ s。接下来，对压力入口和排气入口的位置进行正交实验以及强制吸收的气流量比，以检查不同组合对隧道中的灰尘抑制效果的影响。通过选择灰尘扩散距离，隧道中的平均粉尘浓度和粉尘收集效率作为评估指标，确定了三种有利的方案，选择了最佳方案。在最佳组合中，次级压力入口和排气入口分别为28μm，分别远离隧道面11μm，强制到吸收的气流量比为1.6。在该方案的优化之后，隧道中的粉尘扩散距离大大缩短了53％，平均粉尘浓度降至1.52E-06kg / m（3），粉尘收集效率提高了13.19％。在这些最佳条件下，通风除尘系统可以最大化运行效率，并确保在任何生产活动期间的清洁空气环境。 （c）2020化学工程师机构。 elsevier b.v出版。保留所有权利。

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