In 2014, APEC will be held in Yanqi lake, Beijing. Zhao Huimin, director of the Foreign Affairs Office of the Beijing municipal government, said that eight measures such as population control and motor vehicle control will be adopted. He said: Chinese people are used to cooking, for PM2 The contribution of 5 is not small. I hope citizens can cooperate with clean air work. When cooking, kitchen fume will produce PM2 5?
Kitchen fume will produce PM2 5?
meeting. However, compared with motor vehicles, coal burning and industrial dust, cooking fume is not the main PM2 5 source, which accounts for a relatively small proportion. Let's take a look at PM2 5 and kitchen fume.
In Chinese food processing, frying, frying, cooking and frying account for a large proportion, so there is a lot of oil smoke in Chinese kitchens, and the smoke and dust generated in the cooking process of kitchens is also one of the sources of air pollutants. And if you cook with gas, smoke and dust will also be produced in the process of fuel combustion and discharged into the air. Every household discharges smoke and lampblack into the air during cooking time. A little makes a lot. The impact of nature on air pollution can not be ignored. How is lampblack produced?
The oil fume emitted by our cooking is a large number of thermal oxidation decomposition products produced by edible oil and food under high temperature conditions. When cooking, the oil is heated. When the temperature reaches 170 ℃ of the smoke point of edible oil, the blue smoke of initial decomposition appears. As the temperature continues to rise, the decomposition speed accelerates. When the temperature reaches 250 ℃, a large amount of oil smoke appears with pungent smell. The particle size of oil smoke is 0.01 μ m-0.3 μ M.
Although exhausting the oil fume from the kitchen can reduce the oil fume pollution in the kitchen, it naturally pollutes the outdoor environment after every household discharges it into the air. Combined with other factors, PM2 The increase of 5 value, that is, the aggravation of air pollution.
In order to improve the environment and reduce the generation of cooking fume in the kitchen, we need joint efforts from all aspects. We can also start with improving our eating and cooking habits, such as less cooking methods such as frying, frying and stir frying, and more healthy cooking methods such as steaming and stewing. The power of a person is weak, but the power of most people can naturally produce great results.