FLAME DETECTOR FOR COMBUSTOR

摘要

In starter combustor of pressurized fluidized bed combined cycle power system, disorder of flame detecting device due to ash accumulation is prevented. Fuel nozzle 33 of starter combustor is provided to be directed to inner cylinder 32 and pipe 38 of fitting pipe 36 is provided to connect to the inner cylinder 32. Valve body 1, having valve body passage 1a which connects to the pipe 38, is provided to connect to one end of the fitting pipe 36 and valve component 3, having recess portion 3a and connecting to shaft 2, is provided movably into and out of the valve body passage 1a. When the combustor is started, the shaft 2 which engages rotatably with shaft fitting portion 3a' of the valve component 3 and is in thread engagement with threaded portion of the valve body 1 is moved by handle 4 being rotated so that the valve component is moved and the passage 1a is opened. While the combustor is stopped, the passage 1a is closed by the valve component 3 being moved reversely. In ordinary operation time, ash is collected in the recess portion 3a of the valve component 3 and there occurs no accumulation of ash on glass plate 37 thereunder and disorder of the flame detecting device due to ash accumulation does not occur.