| 摘要 |
PROBLEM TO BE SOLVED: To prevent development of clogging dust to a first stage stationary blade, by excluding influence in strength on a moving blade caused by a jet of the stationary blade, without requiring much facility cost. SOLUTION: In this control system of a furnace top pressure recovery turbine 1 for rotatingly driving a generator 81 by being rotatingly driven by exhaust gas exhausted from a blast furnace 51, bypass control valves 54 and 55 capable of adjusting a flow rate of the exhaust gas passing through the inside, are arranged in parallel to the turbine in a gas passage 60 on the downstream side of the blase furnace, and rotating speed control and/or load control in starting and/or stopping of the turbine are performed by changing front pressure of the turbine by operation of the bypass control valves. The turbine has angle variable mechanisms 31, 32, 39 and 40 for changing a flow passage angle of the stationary blades 2 and 3, and the stationary blades are put in a state of opening more than a flow passage full closure angle in starting and/or stopping of the turbine. COPYRIGHT: (C)2007,JPO&INPIT
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