| 摘要 |
PURPOSE:To prevent the level of a drum from an abnormal rise due to a rapid flow increase of gas at starting time, by providing a bypass flue detouring around a heat exchanger and controlling a flow of gas, which flows in the heat exchanger at the beginning of starting, with the level of water in the drum. CONSTITUTION:After the firing of a gas turbine, a flow of gas to a flue 6 is rapidly increased, and if a water level detected by a water level detector 110 is increased higher than the value preset by a setter 112, the output of a controller 113 is increased, and a damper 101 is opened to increase a flow of gas allowed to flow in a flow path 100 of detouring gas. The reduction of heat absorbed in a heat exchanger 7 by a decrease of the flow of gas entering the flue 6 causes the decrease of an expansive amount of water, and its level is controlled to the value preset by the setter 112. |
