Optimal Analysis of Low Emission and High Temperature for Top-fired with Energy Saving
In view of the problems of excessive NOx emissions,high energy consumption,and substandard hot air temperature in top-fired hot blast stoves,a new optimization idea was proposed.Taking the blast furnace hot blast stove of a certain factory as the research object,CFD simulation technology is used to simulate the operating conditions and optimized working conditions of the hot blast stove burner.The combus-tion process,velocity field and temperature field of the combustion chamber under operating conditions were analyzed,and the influence of factors such as load and air-fuel ratio on the combustion flow field and component distribution in the hot blast stove were obtained,and based on the calculation results,a hot blast stove.After optimizing the load and adding an intelligent low-oxygen control system to precisely control the air-fuel ratio,the NOx content in the exhaust gas of the hot blast stove can be reduced to below 200 mg/Nm3;Each furnace cycle can save 31 760 Nm3 of blast furnace gas and 128 560 Nm3 of combustion-supporting air compared with the current operating conditions;it can increase the theoretical hot air temperature by about 30 ℃,reduce the coke consumption of the blast furnace by about 2.4 kg/t,and the corresponding pig iron cost per ton is reduced by 5.76 yuan.
top-fired hot blast stovenumerical simulationlow oxygen controlenergy saving and low emission
万方数据
维普
