Structural design and resistance reduction optimization of a ring suction exhaust hood based on static pressure box diversion principle

In the process of non-ferrous metal rolling,the geometric asymmetry of the oil mist emission source leads to a non-uniform distribution of pollutants near the source.The air volume of each side air outlet of the exhaust hood should be allocated according to the need to meet the requirements of efficient pollutant capture.In this paper,based on the principle of static pressure box diversion,a double-layer partitioned double-ring suction exhaust hood is proposed.The simulation results show that the air volume deviation rate at the air outlet of the double-layer partitioned double-ring suction exhaust hood decreases by 32.04% compared with that before optimization,the structural resistance decreases by 21.93%,and the oil mist escape reduction rate is 20.79%.In addition,this paper analyses the rationality of the structural optimization of the double-layer partitioned double-ring suction exhaust hood from an economic perspective,and it can provide references to the structural design of the exhaust hood and the resistance reduction optimization.