illegal. First of all, it depends on whether the catering unit has installed an oil fume purifier and whether the oil fume purifier is operating normally. Under normal circumstances, it is ok as long as the lampblack purifier is installed correctly, operated in compliance with regulations, maintained and cleaned, and the lampblack discharged reaches the emission standard. If the catering business unit does not install the fume purifier, or installs the movement that is not turned on and cleaned from time to time, and the fume emission is not up to standard, it is illegal to discharge at low altitude or at high altitude. However, it is easy to be found when discharging at low altitude, and it is easy to pollute the surrounding environment, so the probability of being fined for rectification will be greater. Because it is not easy for people to see the pollution situation, the probability of being punished and rectified will be smaller.

1. Is it legal to only use low-altitude lampblack purifier to discharge lampblack?

1. There are several types of fume purifiers. There are also several national standards.

2. One is a high-altitude lampblack purifier, which is required by the state to reach more than 61%. The other is a low-altitude direct-exhaust lampblack purifier, which has a national specification of more than 91%.

3. In this case, it will only be approved for environmental protection to install a low-altitude fume purifier, or you can install the pipeline on the roof, so you can install it at high altitude.

second, what are the requirements for high-altitude emission of cooking fume?

1, discharged in two ways.

2. First, erect smoke exhaust pipes on the external wall of the house to reach the roof for high-altitude emission;

3. Second, it is introduced into the sewer through the pipeline and discharged into the ground. The erection of high-altitude smoke exhaust pipes needs to be negotiated with the residents passing through the smoke exhaust pipes one by one

Legal basis: Article 81 of the Law of the People's Republic of China on the Prevention and Control of Air Pollution, catering service operators who discharge oil fume shall install oil fume purification facilities and keep them in normal use, or take other oil fume purification measures to make the oil fume discharge up to the standard and prevent pollution to the normal living environment of nearby residents.