| 摘要 |
PURPOSE:To enable economical management of the contaminating state of the cooling pipe of the condenser of a steam generating plant by using a thermal power or an atomic power, by a method wherein opening and closing control of a screen and the charging position of a washing material are switched according to an adhering state of a foreign matter to a screen and the contaminating state of the outlet and inlet of a cooling pipe. CONSTITUTION:Ball collection and prescreens 10 and 14 have screen's function of removing a foreign matter 36 in cooling water from a curculating pump 6, and meanwhile, the side, facing an outlet water chamber 12, of an outlet water chamber 11 of a condenser has ball collector's function of catching a washing material 37 in cooling water. By means of outputs from differential pressure gauges 40 and 45, the degree of adhesion of a foreign matter to the collectors 10 and 14 is detected, and through promotion of screen driving machines 31, 32, 33, and 34, collection of a foreign matter to the screen and back washing motion are effected. Further, outputs from heat flow sensors 60 and 65 are compared with each other through the working of an arithmetic unit 200, a motion instruction to ball recovery valves 17 and 26 and ball charge valves 23 and 28 are issued from a control oscillating device so that ball washing is effected by back washing beginning with the outlet side on which the degree of contamination is high.
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