Teacher Zhong said that the alcohol lamp can't be blown, but it will explode?

You can't even blow at home, can you? It's in the textbook. When I was in Canada, I only saw the teacher blowing the torch with alcohol.

The teacher refused to blow it, for fear that it would not blow out at once and let the flame touch other objects, causing accidents such as "fire".

Or blowing, it is easy to blow the flame into the bottle, which will make the alcohol in the bottle burn and cause an explosion.

It may cause the alcohol in the lamp pot to burn and form a "fire rain". When you blow out the alcohol lamp with your mouth, because the air is blown into the lamp pot, the alcohol vapor and air in the lamp pot burn rapidly in the lamp pot, forming a huge airflow and muffled sound, and then forming a "fire rain", which is dangerous. And the less alcohol there is in the alcohol lamp, the more space there is left. When the weather is hot, the mixture of alcohol vapor and air will also form in the lamp pot, which will bring unsafe factors to the next lighting of alcohol lamp. Therefore, you can't blow out the alcohol lamp with your mouth.

Because alcohol is volatile, the mixture of volatile alcohol and air will burn and explode. If you blow with your mouth, it may cause high-temperature air to flow backwards into the bottle, causing an explosion.