1, small oil fume pipes at home can be cleaned with kitchen cleaner at home, and large oil fume pipes must be cleaned by professionals in the flue.

2. If the smoke outlet is too narrow, people can't get into the flue or the flue is too narrow, people can't reach it and can't clean it, but there are serious hidden dangers. You can use a high-pressure water gun to clean it with cleaning agent or caustic soda, and then you can't use hydrochloric acid to clean it, leaving no dead ends. If hydrochloric acid is used, it must be washed with clear water immediately. This method is the most thorough and best cleaning method, but the construction is difficult, the amount of workers is large, and the cost is relatively high.

3. Cleaning scheme

1) According to the actual situation of the flue, the technicians calculated that a section of the flue should be removed every once in a while and extended in two directions for cleaning, so as to ensure thorough cleaning and cleaning quality.

2) Opening method: This method is easier and cheaper than disassembling method, but the cleaning effect is poor. The specific method is: technicians calculate the interval distance, position, size and the number of holes to be opened, and clean the flue through these holes. Finally, each hole is sealed.