Thermoeconomic Optimization And Analysis Of Iron-making System

The steel industry underlies the whole society economy and development. The steel enterprises with high energy consumption of iron-making system creates great opportunities to the energy saving, so the blast energy saving, emission reduction research, for lower costs and improve competitiveness of enterprises is of great significance.Different from Energy analysis and Exergy analysis, thermoeconomic analysis integrates the Thermodynamic analysis and economical factors which takes into account of the "quality " and "quantity" in energy, and prices the exergy flow to maximize the benefit. This paper constructs the thermoeconomic cost analysis models process by matrix model thermoeconomic analysis according to iron-making system and supplementary equations to sort out the thermoeconomic cost. I verify the correctness of the model by calculation of actual production data.This paper established thermoeconomic optimization model of Angang no.11blast furnace by linear programming based on thermoeconomic cost calculation of sub process and minimized the cost. Other than previous optimization model, thermoeconomic optimization model based on the substance conservation to set up the restriction of exergy, namely optimized efficiency much better than the actual exergy efficiency, optimized loss fewer than actual quantity. With the calculation of optimization model and compared with actual production date I verify the correctness of the model. At the same time we analyzed the factors such as raw material quality, coke ratio which impact the thermoeconomic cost, and make suggestions for energy saving, emission reduction.Based on the optimization results, the use of perturbation theory analyzed the obstacles of blast furnace process to other processes, which show the direction for the iron and steel enterprises to provide energy-saving, cost reduction.