Exposure levels of oil mist particles under different ventilation strategies in industrial workshops

Oil mist particles emitted in industrial buildings are harmful to health. To evaluate the control effect of existing ventilation strategies on oil mist particles, this work conducts field investigations on the processing workshops of different scales and processes. Through on-site measurements, the basic characteristics of the mass concentration, quantity concentration, particle size distribution, processing technology, and emission rate of oil mist particles can be learned from different angles. The article presents the concept of unit emission rate index, which can provide reference data for ventilation design, as well as input parameters for simulation calculation. At the same time, based on the air change rate, the effect of controlling oil mist particles was evaluated, and the relationship between the air change rate and the concentration of the workshop was investigated. In view of the uniformity of the oil mist concentration in the workshop, the influence of the process emission rate and the ventilation mode on the mass concentration of oil mist particles was discussed. The conclusions obtained can be used as data support for optimizing ventilation strategies to control oil mist pollution and play a certain guiding role in the ventilation design and evaluation of industrial buildings.