| 摘要 |
PURPOSE:To prevent a wasteful consumption of power by carrying out the control of the rotational speed of a blower based on a set value during a period from immedi ately after the changeover of a combustion furnace to a set time, and automatically controlling the rotational speed so that the rotational speed assumes a predetermined target value after the elapse of the set time, in equipments for blasting air for combus tion of a hot stove. CONSTITUTION:Pressure meters 20 are provided in subdusts for combustion air, respec tively. Further, a pressure controller 22 is provided for generating a blower rotational speed target value signal eliminating a deviation in accordance with a deviation be tween a pressure target value set in a pressure setter 21 and a pressure measured value measured by the pressure meter 20. Further, a program setter 23 is provided for transmitting a predetermined set rotational speed signal during a period from immediately after inputting of a furnace changeover signal transmitted from a combus tion furnace changeover controller 17. At the same time, a changeover apparatus 24 for alternately change over and connecting the program setter 23 and the pressure controller 22 to a rotational speed controller 15, is provided. By this organization, the blower is operated at a minimum rotational speed for a required flow amount during pressure control period. |
