论文部分内容阅读
为了综合描述高海拔矿井掘进工程中内燃机尾气污染的影响范围和扩散规律,为高原矿井掘进工程施工过程中的通风方案设计提供需风量等关键数据,在对高原作业条件下内燃机械的工况与排放规律进行测定分析的基础上,采用Fluent软件对工作面的尾气运移规律进行了数值模拟,得出了掘进工作面需风量与内燃机工作功率之间的量化关系。结果表明:高海拔矿山掘进工作面的主要污染源为内燃机燃烧不充分所造成的CO排放,且其排放量在内燃机额定工况范围内随转速增大而增加;通过数值模拟过程可以得出巷道中风筒出口需风量与内燃机功率呈正相关性,因而高海拔地区矿山的掘进工程中,可以通过增大压入式通风量的方法解决巷道内尾气污染问题。
In order to comprehensively describe the influence range and diffusion rules of internal combustion engine tail gas pollution in high altitude mine tunneling project and to provide the key data such as the amount of wind needed for the ventilation scheme design during the construction of highland mine tunneling project, Based on the measurement and analysis of emission law, Fluent software was used to simulate the law of tail gas migration, and the quantitative relationship between the required air volume of working face and working power of internal combustion engine was obtained. The results show that the main source of pollution is the CO emission caused by insufficient combustion of internal combustion engine, and its emission increases with the increase of rotating speed under the rated working condition of internal combustion engine. Through the numerical simulation process, The volume of air required by the outlet of the cylinder is positively correlated with the power of the internal combustion engine. Therefore, in the tunneling project of high altitude mine, the problem of exhaust gas pollution in the roadway can be solved by increasing the amount of ventilation.