What are the Advantages of Self-Preheating Burner?
What are the Advantages of Self-Preheating Burner?
Self-preheating burner, also known as a heat exchange burner, is actually a burner that combines the burner and heat exchanger into a whole and preheats air or gas in the burner with flue gas. Therefore, the main advantage of a self-preheating burner is that it has a good energy-saving effect. Compared with the unrecycled flue gas waste heat burner, this kind of burner can reduce fuel consumption by 20%~30%, and it can be installed as easily as the ordinary burner, and its volume is only one-tenth of the flue heat exchanger. The main disadvantage is that it is not convenient to adjust the flow route of furnace gas with the flue port.
Structure diagram of the preheating burner from itself. It can be seen that this kind of burner is actually equipped with a countercurrent heat exchanger outside the burner body, which can preheat the combustion air required by the burner itself. Its structure mainly uses several layers of concentric sleeves to separate the air and flue gas from each other, and the intermediate sleeve acts as the heat exchange surface. The whole heat exchanger is made of heat-resistant steel. The ejection velocity of fuel products from the nozzle is 80m/s. This higher exit velocity promotes good recirculation of furnace gas, thus improving the heat transfer process and having better temperature uniformity. With the help of the air ejector in the exhaust pipe, the combustion products are attracted through the heat exchanger, and the pressure in the furnace can be adjusted by changing the amount of injected air. This self-preheating burner can be used in industrial furnaces with a working temperature range of 600~1400 ° C, and the effect is better when it is used in high-temperature furnaces above 1000C.
Explosions and gas poisoning are the most important things to pay attention to when burning fuel. Attention must be paid during use: ① cleaning before ignition and after extinction; ② observation of flame during combustion; ③ The induced draft fan or combustion fan must be opened before the fuel gas valve. When stopping, the fuel gas valve must be closed first, and then the induced draft fan or combustion fan.