Estimativa da temperatura adiabática de chama da fornalha de uma caldeira siderúrgica industrial

Abstract

Steel industry produces four by-products with significant capacity of energy generation. These products can be used as fuel at steel boiler, equipment thermoelectric plant. The objective of this study is to propose a modeling to estimate the adiabatic flame temperature furnace’s of an industrial boiler steelmaking with the variation of available air and fuel. The technique employed consists in principle of the First Law of Thermodynamics. The system's energy balance was proposed thus defining the model. The solution’s model enables to estimate the system’s temperature of the adiabatic. In industry, the adiabatic temperature is determined by the fuel’s lower heating value. The methodology proposed in this study makes is not necessary experimental surveys of the lower heating value. The values at the adiabatic temperature simulated to indicate that use different operating conditions in the feed of fuel and air can significantly affect the value of this parameter. In the simulation with the variation in air, it is noted that the adiabatic temperature decreases with the increase of excess air. This result is expected since the increase of the mass contained in the system decreases the energy efficiency of the process. It is concluded that the methodology proved to be effective to describe the system when different air and fuel feed are adopted.