The generation of kitchen fumes:

Kitchen fumes are mainly composed of cooking fumes and fuel combustion products.

Cooking fumes are formed when cooking oil or food under high temperature conditions, after a series of changes. Studies have shown that cooking fumes are a group of mixed pollutants, the composition is extremely complex, there are 200?~?300 kinds of more, including volatile nitrosamines and other known mutagens and carcinogens. In the oil temperature of 270 degrees, from vegetable oil and soybean oil smoke can be detected in trace quantities with mutagenic effect of crotonaldehyde and acetone concentration gas. Meanwhile, during the cooking process, the water in the food vaporizes and expands dramatically, partially condenses into mist, and then forms visible oil smoke together with the oil smoke. It can be seen that cooking fumes for cooking oil and food at high temperatures in the volatiles and their condensate aerosol water vapor, is a group of mixed pollutants. In addition, cooking fumes often have some irritating odor. Morphologically, cooking fumes include respirable particles PM10 and PM2.5, gaseous pollutants in two categories.

And the city gradually appeared to grill lamb kebabs, barbecue meat, grilled chicken wings, etc. as the main business of the barbecue restaurant, they use charcoal, charcoal as fuel, producing a large number of dusty oily smoke gas. The oil smoke in this kind of oil smoke gas is mainly polycyclic aromatic hydrocarbons, nitroaromatic hydrocarbons, heterocyclic amines and other strong carcinogenic substances, as well as tar, CO?and CO2?etc.. Dust particles in the oil smoke gas, mainly for the gas out of the ash particles (i.e., fly ash) and part of the unburned carbon particles, of which the particle diameter of less than 10 μm? is known as floating dust, the particle diameter of 10 μm?~?100 μm?, can quickly fall to the ground is known as falling dust. Although charcoal has a high content of fixed carbon, black smoke is still emitted during charcoal combustion, mainly due to incomplete combustion of fuel. According to the fuel combustion theory and the composition analysis of the fuel, it is impossible to make the incomplete combustion loss equal to zero in the actual combustion process. Even if the combustible material 100%? Combustion, non-combustible material (such as ash, non-combustible sulfur, etc.) still exists, so the soot discharged is white.