At present, primary air combustion is widely used in coal burner.What we are talking about today is a swirling high concentration pulverized coal burner.The burner is composed of U - shaped three - way pulverized coal concentration separator and secondary air conditioning.The total concentration of the primary wind through the u-shaped separator.Most of the coal powder is concentrated outside the curve of the separator, and a low concentration of coal powder flow is formed inside the curve.Secondary air from the air source into secondary air conditioning, divided into direct flow and rotary flow.Although the cyclone burner is equipped with secondary air source, it has the disadvantages of short flame, low temperature and poor dust removal effect.In order to overcome the shortcomings of pulverized coal burner, we provide a pulverized coal dust burner.
The characteristics of pulverized coal dust removal burner are that the pulverized coal dust removal burner is composed of three parts: pulverized coal feeder, air feeder and furnace body. The coal dust hopper outlet of the coal feeder is connected with the star feeder, and the star feeder is connected with the column.Cyclone burner, cyclone burner is a special chamber, the cyclone burner is connected with the burner end of the furnace body, the air supply outlet of the air supply device is connected with the main air pipe, the total air pipe is on one side of the furnace body, the primary air nozzle is at the end of the combustion side of the furnace body, and the primary air nozzle is fixed at the end of the cyclone burner.In the center of the primary air nozzle, the other end of the cyclone burner is provided with an adjustable spiral regulating wheel in the form of spiral blade.The main air duct is also connected with the secondary air nozzle and secondary air, and the nozzle is arranged around the regulating wheel. The main air duct is also connected with the three sides outside the furnace.Several rows of secondary air nozzles and three air nozzles are arranged vertically and horizontally outside the furnace body. Each row has three air nozzles. The injection direction of air nozzles is arranged tangentially with the cylindrical combustion chamber.The pipe is located at the ash outlet combustion side of the lower side of the combustion chamber, the ash blowing pipe is equipped with oil nozzle for drying furnace, the furnace body is installed on the combustion chamber bracket, and the furnace body is provided with soot.Refractory layer.Furnace burner is fixed by a whirlwind, at the end of the furnace with the nozzle body, on the other side of the nozzle hole is the center of the nozzle body, the lower part of furnace combustion chamber has a sloping ash skateboards, ash slide cylinder outlet is equipped with ash, electrostatic precipitators, set the lower end of ash device is connected to the water bath, the exit of the water bath with the tilt of the mechanical screw slag discharge connection.
This burner is simple in structure, low in cost, small in size, easy to move, and can be connected with various heating furnaces, smelting furnaces and rotary kilns.With the flame combustion, can recover more than 80% of the coal ash, in the burner can completely burn pulverized coal, the flame is white.Bright flame length up to 7-8 meters, flame temperature can reach more than 1500 degrees.
