Working principle of pulverized coal burner
Editor: jiangsu jufeng thermal technology co., LTD
The burner is a device that mixes fuel and air reasonably to make fuel catch fire steadily and completely. Burner is used for pulverized coal, the liquid fuel and flammable gas combustion in boiler and industrial furnace. The pulverized coal burner can be divided into DC burner and swirl burner, due to the DC burner structure is relatively simple, and the applicable range is relatively narrow, today Generalflame is going to make a brief introduction of swirl burner which is widely used in industrial production.
Working principle of pulverized coal burner: the pulverized coal burner developed by our company can improve the combustion stability of the boiler when the boiler starts, stops or is under load, so it can save a lot of ignition and low-load combustion oil. Pulverized coal burner has specially designed multi-stage and multi-nozzle air supply guiding structure, which can make pulverized coal produce high temperature eddy current in a short time, and it has the advantages of sufficient combustion, high heat utilization rate, smoke elimination and dust removal, high efficiency and energy saving, improve working conditions, reduce labor intensity and so on, and is an ideal product for energy conservation and environmental protection. Can solve the problem of accumulation of powder and slagging, further achieve the effect of oil saving, and can increase the amount of backflow smoke which is conducive to the fire and combustion of difficult coal species, and also can protect the barrel wall material does not exceed the permitted use temperature. A small fluidized bed pulverized coal precombustion heating chamber is set outside the primary air jet of pulverized coal, which, together with the primary and secondary air jet of pulverized coal, constitutes a fluidized bed coal precombustion heating burner.
Fluidized bed pulverized coal heating precombustion chamber is a small fluidized bed; the air blow into the bed is only a few which is not enough for sufficient combustion. In normal operation, in the fluidized bed is with hot bed material, when coal powder blow in, it mixes rapidly with hot bed material, rapid heating, quickly reach the ignition temperature and combustion. Then the hot flue gas carries the ignited pulverized coal, leaves from the fluidized bed preheating room, and inject into the furnace to form a stable high temperature flame. Because fluidized bed with a strong adaptability to fuel, any fuels difficult to burn can quickly be heated and lit, and because the air flow inside the fluidized bed, coal, and pulverized coal with a wind carried in proportion to the amount of pulverized coal are easy to adjust, so can burn any coal including anthracite, have the ability to greatly adjust the load, even under very low load operation, It also does not need oil or gas fuel to support combustion, so the burner fundamentally solves the problem of not needing oil or gas fuel to support combustion under low load.
