Device for purifying the feed water of a steam power installation

Claim 1

Device for cleansing the feed water of boilers from iron oxides, which comprises an electromagnetic filter comprising a cylindrical filter container, containing a filter bed of magnetizable particles and a coil for producing a magnetic field surrounding the filter bed, the magnetizable particles consisting of steel balls and the field intensity produced by the coil is considerably above the saturation field intensity of the steel balls, decaying alternating current means for regeneration and rinsing of the filter by effecting demagnetization of the steel balls, means for introducing rinse water from below upward at such speed through the filter container that the steel balls are whirled up, said filter container being connected in parallel with a feed-water container, an inlet to the filter container from a first chamber of the feed-water container and an outlet of the filter container feeding into a second chamber, said chambers of the container being separated by a wall which separates the container only in the lower portion thereof, and a pump connected in series with said electromagnetic filter, said pump being operated in dependence on the liquid level, in one part of said container.