Working principle of tube furnace burner

The burner of a tubular furnace comprises an outer wall, an intake pipe group, an air inlet and an ignition nozzle. A pneumatic propeller is arranged at the bottom of the burner; A fire stabilizing cover is arranged on the top of the burner; The bottom or side part of the burner is provided with a fire detector installation pipe; The bottom of the burner is also provided with a fire viewing hole. Compact structure, stable combustion, large regulation ratio, low noise, can be equipped with flame detection and alarm system; The flame spreads well, burns completely and burns easily. To meet the requirements of today's environmental protection, but also to save fuel, improve the efficiency of combustion. A premixed air passage extending along the axis of the burner through which combustion air may be fed. An eddy current device is arranged in the air passage so that the burning air may present an eddy current. An injection device for low-heat combustion gas is provided downstream of the vortex device.

Among them, the injection device has an air inlet for combustion gas, so as to prevent the formation of a follow-up area in the air passage. The combustion air is vortexed, the low-calorie combustion gas is sprayed into the vortex-like combustion air and mixed with it, and the mixture is subsequently burned. The device comprises a bracket, a number of burners, and a number of burners mounted on the bracket, wherein the mixing length L of the burner's venturi tube is 72-84 mm, and the suction cross section area of the venturi tube is 285-380 mm square. Due to the increase of mixing length in venturi tube and the increase of suction inlet cross section area, the single burner has a large power. In addition, to realize high-power gas water heater, there is no need to increase the number of burners and the size of heat exchanger, which greatly reduces the cost. The primary and secondary burners have a secondary burner cover and a circular ring around the secondary burner cover. The secondary burner cover is provided with a secondary burner fire hole and the main burner cover is provided with a primary burner fire hole. A hollow convex part is arranged on the upper wall part of the main burner cover between the fire hole of the main burner and the fire hole of the secondary burner. The center of the main burner cover is taken as the cutting rotary axis to make it rotate. The thick part between the longitudinal wall of the side of the convex part of the auxiliary burner and the longitudinal wall of the side of the fire hole of the main burner is cut off by lathe, thus forming a pair of fire holes on the convex part. The burner housing consists of upstream and downstream ends facing each other axially.