The working principle of the regenerative burner is that the normal temperature atmosphere from the blower is switched into the regenerative burner B by the reversing valve, and then it is heated when the ceramic ball of the regenerative burner B is turned over. In a very short time The room temperature atmosphere is heated to near the furnace temperature (the same is usually 50-100°C lower than the furnace temperature). After the heated high-temperature hot atmosphere enters the furnace, the flue gas in the surrounding furnace is entrained to form a stream of oxygen content that is much lower than 21% At the same time, the fuel is burned in the oxygen-poor (2-20%) state; at the same time, the hot flue gas after combustion in the furnace ends up with another regenerative type Burner A is discharged into the atmosphere, and when the high-temperature hot flue gas in the furnace passes through the regenerative burner A, the sensible heat is stored in the regenerative burner, and then squeezed by the low-temperature flue gas below 150℃ through the reversing valve . The reversing valve with low operating temperature is switched at a certain frequency, so that the two regenerative burners are in the state of heat storage and heat release, so as to achieve the goals of energy saving and lower NOx emissions. The commonly used switching cycle is 30-200 seconds. Through the preface of the heat storage body, most of the exhaust heat of the exhausted flue gas is converted into the physical heat of the combustion medium, which is fully accepted and used.