What are the advantages and disadvantages of natural gas burners?

What are the advantages and disadvantages of natural gas burners?
When the shut-off valve cuts off the air source and restores the air supply, the inlet valve of the pressure regulator should be closed first. After troubleshooting, the nut should be unscrewed, the valve stem should be pulled out to reset the brake to lock the valve stem and install the screw. Lid, you can supply air. The natural gas burner is planned for the blast furnace exhaust gas produced by steel enterprises. The blast furnace gas incinerator utilizes blast furnace exhaust gas of any pressure and heat value for active incineration and other functions. A natural gas incinerator is a heating device (such as a boiler, industrial furnace, etc.) that uses hot gas as a heat source to complete the hot gas incineration process. Its function is to introduce hot gas and combustion air into the heating equipment or burn in the burner according to a certain proportion and mixing conditions, meeting the requirements for the direction, shape, stiffness, and diffusion of the flame during the heating process. The developed hot gas incinerator consists of two parts: the main body of the incinerator and the incineration organization. For non constant heat equipment (such as boilers), due to the uncertain and uneven heat load, it is difficult to forcibly distribute air after the incinerator is built. Therefore, the body structure is generally Self-diffusion (or free type), that is, the hot gas is not combined with the combustion support, and the air is mixed early (or only partially mixed when the heat intensity is high), but after being injected into the furnace, it burns at the same time when mixed with the air in the furnace.
The advantages of Self-diffusion incinerator are not easy to backfire, large scheduling ratio, simple structure, high incineration load and good performance; The disadvantages are a high excess air coefficient (generally ranging from 1.1 to 1.25) and low flame intensity. Constant temperature heating equipment (such as most closed industrial kilns), due to the high storage temperature inside the furnace, unstable incineration heat load, small unevenness, and relatively stable gas consumption. Therefore, incinerators generally choose the pre mixed and staged incineration method, which means that the gas and combustion supporting air are pre mixed at the incinerator or nozzle, and then sprayed into the furnace for incineration. The advantages of premixed incinerators are small air excess coefficient (usually 1.03-1.05) and high flame intensity; The disadvantage is that it is easy to temper and has a low scheduling rate. The valve disc on the airway is in a "loss" state, making it more reliable to seal under the pressure of the medium. This three-way valve can be installed at both ends of the furnace near the burner. Compared to large four-way valves, the pipeline is shorter and can greatly reduce the loss of pipeline during gas switching.