四角布置直流燃烧器锅炉燃烧调整（Combustion adjustment of the dc burner boiler in four corners）.docVIP

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四角布置直流燃烧器锅炉燃烧调整（Combustion adjustment of the dc burner boiler in four corners）.doc

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四角布置直流燃烧器锅炉燃烧调整（Combustion adjustment of the dc burner boiler in four corners）

四角布置直流燃烧器锅炉燃烧调整（Combustion adjustment of the dc burner boiler in four corners） Combustion adjustment of the dc burner boiler in four corners 1, the work principle of the dc burner is arranged by the four corners The dc burner is generally arranged on four corners of the furnace. The pulverized coal air flow at the nozzle, although it is a dc jet, but when When the four air currents reach the center of the furnace, they join in the form of tangential forms. It forms a rotating combustion flame and creates a downward spiral in the furnace. The working process of the dc burner: (1) the process of heating up the flue gas of the coal dust; (2) the balancing air and pressure balancing process on both sides of the jet stream; (3) the ignition process of the coal dust; (4) mixing of coal and secondary air; (5) the rotation process of the air flow; (6) combustion of coke. Although some of these processes are conducted in sequence or several processes, the interaction between processes is significant The process of the main air entrainment of high temperature flue gas. The flow of air from the nozzle of the burner remains high and high. Because of the turbulence of the airflow This phenomenon is called roll absorption. As a result of volume suction, the jet is expanding continuously to four Week of expansion. At the same time, the velocity of the main flow decreases with attenuation. It is due to this volume suction effect of jet flow that the high temperature flue gas The heat is continuously transported to the new coal air in the furnace, and the coal air flow is heated up continuously, when the coal dust is absorbed After enough heat to reach the ignition temperature, the fire first starts from the outer edge of the airflow, and then the flame travels quickly to the air to reach it Steady fire. 1.2. The impact of the air flow in the adjacent corner is ignited In the tangential combustion furnace, four air currents have self-igniting effect. The one side of the coal air flo