When the boiler is seriously short of water, it must be stopped urgently, and it is not allowed to replenish water to the boiler. The main reason is that when the boiler is seriously short of water, it is not known to what extent the water level in the drum is. There may be no water in the drum, or the water wall has been partially dried and overheated. In this case, if the boiler is forced to replenish water, because the temperature difference is too large, it will produce huge thermal stress and damage the equipment. At the same time, when water meets the hot metal surface, it will evaporate a lot of steam instantly, which will make the steam pressure suddenly rise and even cause tube explosion or more serious explosion accidents. Therefore, when serious water shortage occurs, it must be handled in strict accordance with the regulations, and it is absolutely not allowed to go into the water blindly.

Boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy. The original meaning of a pot refers to a container for holding water heated on a fire, and a furnace refers to a place where fuel burns. A boiler consists of two parts: a pot and a stove. The hot water or steam generated in the boiler can directly provide the heat energy needed by industrial production and people's life, and can also be converted into mechanical energy by steam power devices or converted into electrical energy by generators. Boilers that provide hot water are called hot water boilers, which are mainly used in life and have a small number of applications in industrial production. Boilers that generate steam are called steam boilers, usually referred to as boilers for short, and are mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises.