The function and reason of using cement kiln burner
The function of the cement kiln burner is to send the pulverized coal and the air required for combustion into the furnace, combined with a reasonable air flow structure, so that the fuel can quickly ignite and burn stably. Coal air is rapidly and fully mixed with primary and secondary air, which can quickly heat up, catch fire and burn out. When the coal wind reaches a certain characteristic requirement, the shape of the flame is determined by the inner wind, and the length is determined by the outer wind.
The temperature of the burner part is above 1800°C, which is affected by the combustion of the fuel, and frequent changes in temperature will cause a large temperature difference. The lining of the combustor will be eroded and corroded by high-temperature radiation and dust above 1400℃, and will be chemically corroded by the alkali-sulfur compounds in the high-temperature flue gas. Therefore, the burner part must achieve high temperature resistance, high temperature wear resistance, thermal shock resistance, chemical stability, and alkali and sulfur corrosion resistance.
In the past, the high usage rate of cement rotary kilns in production was mainly due to the fact that the equipment can be directly fed into the equipment during production, and it does not need to use a burner. It is simpler and more convenient in operation, so the equipment's use rate in the past Will be higher. But nowadays, due to technological reforms and updates, it is required to use burners in the production of cement rotary kilns. Many people are very puzzled. Below, the editor of Shenghe Combustion will lead you to answer why you should do this.
The fundamental reason is that many experts who are engaged in the research and modification of equipment have conducted a large number of research and comparison experiments on the use and non-use of the equipment. It is obvious from the obtained data that it is not only in the production process that the fuel cannot be completely burned and decomposed without being used. In addition, the flame shape cannot be stabilized during production and the adjustment of flame temperature is inconvenient. If the temperature is not well controlled during production, a series of chain reactions will be caused, which will affect the quality of clinker. However, the use of burners can completely avoid These problems can improve the fuel utilization rate of the cement rotary kiln. Under comprehensive consideration, it was decided to let the equipment using burners replace the equipment that does not use burners.