Моделирование формирования газового факела оптимальной конфигурации в цементной вращающейся печи

Abstract

The aim of the work is to study the influence of the conditions of diffusion combustion of natural gas on the efficiency of heat transfer in a cement rotary kiln. The effectiveness of the thermal operation modes of a cement rotary kiln has been evaluated. The mechanism of the influence of the fuel outflow rate from the burner nozzle and the burner inclination on the parameters of diffusion combustion and heat transfer from the standpoint of rational fuel combustion is determined. It has been established that in furnaces of large diameter, the small length of the flame causes overheating of the clinker in the sintering zone of the furnace. The torch becomes too sensitive to the angle of inclination of the burner, so the regulation of combustion is difficult. For furnaces of large diameter, it is preferable to work with a long flame with a uniform temperature distribution along the length. But at the same time, a buoyant force arises, which presses the torch to the top of the furnace. This impairs mixing with air and leads to under burning of the fuel.