Optimization Study of Air Distribution of Flask Exhaust Hood Based on the Ceiling Attached Jet

Abstract

Pouring is an important process in foundry. However, due to the large number of risers and unfixed flask position, the high-temperature smoke generated by the flask is difficult to collect, which has a negative impact on the working environment and atmospheric environment of the workshop. Solving the environmental problems caused by flask is a focus of green development of foundry industry. In this paper, the effect of flask smoke exhaust hood based on the ceiling attached jet is studied. The air distribution in the exhaust hood is optimized by numerical simulation to avoid the escape of contaminants from the hood. The main influencing factors such as length of air supply duct, flask temperature and air distribution optimization device in the hood were studied. The results show that the ceiling attached jet method can improve the capture efficiency of the exhaust hood. The best capture efficiency is achieved when the length of the air supply duct is 3m. The air distribution can be significantly improved when the length of the baffle is greater than 600mm. Compared with the existing technical scheme, this study can save energy25×104kWh/a, the total particulate emissions are reduced by 97%. This study has important reference significance for the green development of foundry industry.