The harm of oil fume is very great, mainly including:

1. The oil fume is discharged directly without treatment, which causes serious pollution to the atmosphere; 2, oil fume is easy to cause lung cancer, nasopharyngeal carcinoma and esophageal tumor;

3, it pollutes the surrounding objects. People pay more and more attention to the pollution caused by cooking fume.

At present, the direct emission of cooking fume from catering industry without any purification treatment has become a hot topic of residents' complaints. Oil fume pollution has also attracted great attention from the national environmental protection department. The particle size (μm) of oil fume is about 1.1 μ m-11 μ m.. 61% of the oil fume is extremely small with a particle size of 1.1 μ m-1.3 μ m..