Study On Flow Characteristics And Control Plan Of Flame Cutting Smoke In The Forge Shop

According to flame cutting discharge smoke system in Taiyuan Heavy Industry forging shop by Dalian Megaunity Inc as research object, This article studies on high-temperature dust flow characteristics as it’s unorganized diffusion in workshop. At the same time, we need to optimize the air flow organization and improve the exhaust scheme by simulation result.When handling steel by flame cutting, we use high-temperature flame to fusion separate steel. So it is often to appear brown dust, which is pollute the environment in workshop. It is very hard to control dust because of a large total amount of fumes in an instant, fast flow speed, high-temperature and limited of mill construction and technological requirements.To study the rule of source of pollution and dust, we build the mathematic and physical model. As it refers to multi-changes of physical and chemical, the ingredients of dust are complex. To preferably study on dust flow, according to the theory, we should analyze the dust component, include gas and particulate matter. By calculation, we confirm the diameter of the median value as8.77μm. It is necessary to know major parameter gas-solid suspension system and particulate matters’ stress and movement. It is showed that, The thermal buoyancy, compared with Magnus force&Saffman force, are the major influence to motion and variation.To verify efficiency of existing exhaust smoke scheme made by Dalian Megaunity Inc, we build gridding by different type. According to the movement mechanism of high temperature flue gas, we use CFD technology to research and evaluate. It is showed that: the faster it exhausts, the more efficiency it takes, the shorter it stays in workshop. The efficiency stay between64.63%and89.71%by different working condition. At the best condition, because of the boundedness of the single-pull system, there are also about10%dust can’t be trapped.By optimizing existing programs, we use push-pull airflow taking the place of the single-pull airflow, increase the size of air outlet and add smoke screen. We also assess new scheme’s efficiency by critical section, and it is showed that the verification result (x1=5.98m) is similar to our calculated result(x2=6.36m). Finally, we find that it is efficient of new scheme by less energy consumption.Combined with the optimized flame cutting exhaust scheme, the results of this study will provide guidance and reference for practical engineering design alteration in the future.