| 摘要 |
An electrode steam boiler includes a water-receiving shell and water-heating electrodes supported in the shell so as to be partially immersed in the water to be heated. The boiler also has first and second water-handling means arranged, respectively, for supplying feed water to, and withdrawing water from, the boiler shell, and a current responsive means responsive to the current flowing in one of the electrodes for actuating the two water-handling means. Finally, the boiler has means for monitoring the number of actuations in a pre-set period of at least one of the two water-handling means, and means responsive to this monitoring means for actuating a safety means when this number of actuations in a pre-set period of at least one of the water-handling means exceeds a predetermined value. The safety means may take the form of an audible and/or visual alarm or a device for shutting down the boiler. |
