Numerical simulation research on design of displacement ventilation system in large painting workshop

Abstract

This article takes the paint spraying operation of the paint shop of a shipyard as the research object and uses ANSYS FLUENT numerical simulation software to apply displacement ventilation to the paint shop under different conditions of the size of the supply and exhaust vents and the location of the supply and exhaust vents. The airflow organization and the diffusion law of toxic substances were studied numerically. It is concluded that when replacement ventilation is used in the painting workshop, the length and width of the air supply and exhaust vents should be larger than the length and width of the work piece to be sprayed at the same time as long as the air supply and exhaust volume are the same. The supply and exhaust air arrangement method of the lower apply and lower exhaust is used to achieve the best ventilation and detoxification effect. It can effectively discharge toxic substances into the workshop and reduce the exposure of paint spraying workers to toxic substances.