High dust concentration and dust dispersion caused by the operation of large-scale equipment affect the health of workers and pose safety concerns such as"dust explosions".To deal with this problem,a novel curtain-type dust collection system is proposed and its structure and application are introduced.In order to enhance the dust collection efficiency of the system,numerical simulation analysis is conducted using Computational Fluid Dynamics(CFD)software FLUENT,and experimental research is carried out on the operating parameters of the curtain-type dust collection system.As a result,the optimal equipment operating parameters and the dust collection efficiency of the curtain can be obtained.The results indicate:(1)The wall-attached swirling dust collection curtain system can form a stable spiral airflow field,with most of the dust being controlled on the inner side of the curtain,achieving good dust collection results.(2)The ejection angle of the jet chamber slot of the wall-attached swirling curtain dust collection system has the most significant impact on the curtain formation effect,and the curtain closure varies with the change in the working angle of the jet chamber.(3)When the ejection angle of the jet chamber slot is 45° and the inlet velocity of the curtain ranges from 15 m/s to 25 m/s,the closure of the curtain shows the best effect compared to other parameters.(4)Excessively high or low inlet velocities of the curtain leads to a decrease in the dust collection efficiency of the curtain.(5)A weak turbulence is generated at the junction of the negative pressure region of the dust collector and the curtain,but it has a minor impact on the overall closure of the curtain.(6)The simulation results from the software and experimental research are consistent,validating the effectiveness of the novel wall-attached swirling dust collection curtain technology.
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