Boiler is a kind of energy conversion equipment, the energy input to the boiler is the chemical energy of the fuel, power, boiler output has certain heat of steam, hot water or organic heat carrier. The original meaning of the pot refers to a water container that is heated in a fire, which is the place where the fuel is burned, and the boiler consists of two parts. Hot water or steam boiler of can directly provide the required heat energy for industrial production and people's life, also can be converted into mechanical energy by steam power device, or by a generator converts mechanical energy to electrical energy. Boilers that provide hot water are called hot water boilers, mainly for life, and there are also a few applications in industrial production. Boilers are called steam boilers, often referred to as boilers, and are used in power plants, ships, locomotives and industrial mines.