Process equipment limitations resulted in constraints on the location of the exhaust hood

which in turn caused escape of high-temperature buoyant jets. In response to this situation

spray system is installed as an auxiliary measure to improve the control effect by spray cooling and weakening the momentum. However

the correlation between spray parameters and its atomization characteristics in high temperature ambient is not clear

reasonable spray parameters directly affect the performance of spray-local exhaust ventilation (SLEV). In this study

we discuss the spray field characteristics under the action of high-temperature buoyant jets

the effects of exhaust and spray parameters on the capture efficiency of SLEV

combined with orthogonal test to get the optimization order. Influences discussed include: exhaust velocity

spray pressure

and nozzle hole diameter. The results showed that SLEV provides superior control of high-temperature buoyant jets

up to two times that of the local exhaust ventilation (LEV). Compared to nozzle hole diameter

the spray pressure significantly effects spray field characteristics. Under high-temperature buoyant jets conditions

the statistical mean diameter obeys a power function relationship with spray pressure

and the capture efficiency was 75% as the spray pressure of 2.0 MPa and nozzle hole diameter of 1.8 mm. The factors affecting the performance of SLEV were found to be exhaust velocity spray pressure nozzle hole diameter by range analysis. The research results are expected to contribute to the optimization and enhancement of the SLEV.