FIELD: control systems of steam or hot-water boiler plants. SUBSTANCE: system includes boiler plant with air consumption, fuel consumption, drum water level and furnace rarefaction control loops. Each control loop includes respective sensors, setters, actuating mechanisms and control members. Air consumption sensor at furnace inlet is connected with fuel consumption regulator setter, before-burner fuel pressure sensor is connected with fuel regulator and air consumption regulator setter presets required pressure of steam in drum for optimization of relationship of consumption of air and fuel irrespective of consumption of steam at high accuracy of maintenance of pressure of steam in drum. EFFECT: enhanced accuracy of regulation of parameters of heat transfer agent at optimal relationship of air and fuel consumption in wide range of steam consumption. 2 dwg
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