The main working principle of the boiler is a thermal equipment that transfers the heat energy released after fuel combustion or the waste heat in industrial production to the water in the container to make the water reach the required temperature or a certain pressure of steam. The boiler is carried out at the same time in both "boiler" and "boiler" parts. After the water enters the boiler, the heat absorbed by the boiler heating surface in the steam water system will be transferred to the water supply, so that the water can be heated into hot water of certain temperature and pressure or generate steam, which will be led out for application. In the combustion equipment part, the fuel combustion continuously emits heat. The high temperature flue gas generated by combustion transfers heat to the heating surface of the boiler through heat transmission, while its temperature gradually decreases, and finally it is discharged from the chimney

The boiler is divided into "boiler" and "boiler". "Boiler" is a pressure part containing water and steam, which heats, vaporizes and separates water from steam. "Boiler" is a place for fuel combustion or other heat release, with combustion equipment, combustion chamber furnace and heat release flue. The heat conversion process is carried out between the boiler and the boiler, and the interface between heat release and heat absorption is called the heating surface. The boiler heats water into steam. In addition to the boiler and furnace, there are other auxiliary equipment such as framework, platform, escalator, combustion, slag discharge, flue duct, pipeline, furnace wall, etc.