СИСТЕМА АВТОМАТИЧНОГО РОЗПОДІЛУ ГАРЯЧОГО ДУТТЯ ПО ФУРМАХ ДОМЕННОЇ ПЕЧІ

Abstract

The article considers the current issue of automatic control of the distribution of the blast through the blast furnace tuyeres. Ensuring a uniform distribution of blast over the furnace hearth allows you to even out the heating around its circumference, improve the distribution of gas flows in the column of charge materials and the full use of chemical and thermal energy of gases. Studies of existing blast distribution systems have shown the reasons for their inoperability. This was because the measuring equipment, the control devices and the actuators do not withstand high temperatures. As a solution to this problem, it was proposed to add carbon fiber in the development of the actuators that will significantly reduce the abrasive wear and increase the resistance to high temperatures. A system of automatic control of the blast distribution for each tuyere separately was also developed. The airflow in the system is measured with Venturi tubes using a variable differential method. Regulation in the system is carried out by means of a carbon fiber-reinforced butterfly valve installed in the fixed knee of the tuyere device befind Venturi tube. In the environment of object-oriented programming, special software for controlling the process of the blast distribution through the tuyeres, its uniform distribution and redistribution between all tuyeres, with the option to set the total flow rate and the flow rate for a single tuyere was developed. Using the developed system of automatic distribution of blast by tuyeres will ensure a uniform supply of blast to the furnace of the blast furnace through separate tuyeres, which will increase the productivity of the furnace itself while reducing coke consumption