Big mouth air guide structure multistage pulverized coal burner with special design, can make the coal in a short period of time to produce high temperature vortex, with complete combustion, high heat utilization rate, smoke and dust, high efficiency and energy saving, improve working conditions, reduce labor intensity and other advantages, is energy saving and environmental protection of the pulverized coal burner has a special design for multilevel air guide mouth the structure, can make the coal in a short period of time to produce high temperature vortex, with complete combustion, high heat utilization rate, smoke and dust, high efficiency and energy saving, improve working conditions, reduce labor intensity and other advantages, is the ideal energy saving products. High efficiency combustion technology of pulverized coal and low NOx combustion technology are two kinds of technology which are contradictory to each other. Reduce the formation and emission of NOx lies in the control of the combustion zone temperature is not too high, but the effect of low temperature combustion and the combustion rate of pulverized coal, coordinating the application of these two technologies to achieve the best comprehensive effect is to actually control requirements of the whole process of pulverized coal burning. Not only can ensure the stability of pulverized coal ignition, and combustion temperature is relatively low, at the same time at a certain temperature of combustion time is long enough and keep burning. Burner of pulverized coal burner with a precombustion chamber 1, which is China's earliest research, currently the most widely used new type pulverized coal burner device. Burner with a precombustion chamber by the pre combustion chamber of refractory material or heat resistant steel plate manufacturing. 2, the bluff body burner type burner was developed in Huazhong University of science and technology at the beginning of 80s, the scope of its application after the burner with a precombustion chamber. Used in boiler burning coal, lean coal and anthracite, used as flame stabilizing and improving combustion. It is in the corner of the burner at each corner of an air vent outlet, set up a bluff body — — bluff body, the pulverized coal airflow circulation in the wake of the bluff body, the entrainment of high temperature flue gas for fuel ignition and flame stabilization. After the fire of the pulverized coal in the furnace consists of four corner tangential combustion. 3, flame stability vessel burner, also known as the type of pulverized coal burner was developed by Tsinghua University in the middle of 80s. The structure for the installation of a ship in the conventional pulverized coal burner flame stabilizer once in the air outlet, and the center of a small oil gun ignition. After adopting the structure, on the pulverized coal into the furnace to bypass it later, away from a nearby air jet to form a waist. High temperature and high concentration of pulverized coal and proper oxygen concentration area is formed between the two sides of the outer edge of the beam waist, a good fire source ignition of pulverized coal air flow, thereby stabilizing combustion in furnace.