Research On Thermodynamics And Heat Transfer Optimization Of Sintering Cooler

Energy saving and emission reduction of iron and steel enterprises are imminent.Reducing the energy consumption of various production processes is the core problem to enhance the competitiveness of the market.The secondary energy produced by the sintering process in the iron and steel production is one of the key research objects of the energy saving and emission reduction to the iron and steel enterprises.Therefore,the topic of the paper has important theoretical significance and engineering practical value.Firstly,the cooling process of the ring cooler and the helical cooler is analyzed theoretically from the thermal point of view,and the models of heat balance,energy balance and entropy generation are established respectively.Secondly,aiming at the domestic 435m2 sintering ring cooler,thermodynamics and heat transfer calculation is conducted;the thermal efficiency,energy efficiency and minimum entropy production are taken as the evaluation indexes to analyze the cooling effect of the air leakage,the cooling air temperature,the cooling air volume and the end temperature of the sinter.In order to get the best working condition of ring cooler.The results show that when the end temperature of the sinter is controlled at 700?,the cooling air temperature is controlled at 100? and the cooling air volume is controlled at 550000Nm3·h-1,the cooling effect of the ring cooler is the best.At the same time,the air leakage problem of 435m2 ring cooler is put forward.At last,the thermodynamics and heat transfer analysis are carried out in the same way with the ring cooler on the helical cooler equipped with the activity sealing baffle device.Calculations prove that when the end temperature of the sinter is controlled at 800? and the cooling air temperature is controlled at 110?,the single blower capacity of each blower is controlled at 600000Nm3·h-1,the cooling effect is the best.The results of thermal and heat transfer optimization analysis of the sintering cooler provide theoretical basis for the upgrading and optimization of the sintering process.Cooling machine improvement measures and the new technology proposed can provide technical reserves of the depth of energy-saving emission reduction for the iron and steel industry.