| Hot blast stove is the main accessorial facility, hot blast of which is the base of iron-making in blast furnace, it requires to reach stable top temperature in given time in combustion process, and best air-fuel ratio should be kept. Top temperature changes for the change of gas heat valve, gas and pre-burnt air flux and pressure in practical production. To reach the best effect of combustion, air and gas flux should be regulated, credibility and precision are required in the process of combustion control, stable hot blast temperature should be kept and reasonable flux of air proportion should be assured in the process of combustion.Automatic combustion control system of hot blast stove in Qiangang, works out task condition of stove with control model, control function of process reached from ignition, combustion, combustion-stopped, Correction of air-fuel ratio, fast control of regulated valve, velocity control of combustion, switch of automatic and manual non-disturbing combustion, air-fuel ratio self-optimizing control goes with the change of top temperature in heat accumulated time to reach gas and air flux correct control, combustion velocity is controlled as temperature of waste.Automatic combustion control system has the figure interface, up-monitor system change fast data with down-PLC. Switch of interface can make operators to grasp the condition of equipment and present case of product timely.Control program of automatic combustion control system is better-rational for the whole control of automatic combustion progress, and factor is better-general, has the corresponding method to different condition and changed factor, and it runs well. |
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