Hitachi, Ltd.

Fumitaka Handa

Norihide Saho

Minoru Morita

Hisashi Isogami

Katsuhiko Asano

Tetsuya Tanaka

Noriyo Nishijima

Koichi Tsuzuki

Shiro Nakadaira

An improved apparatus for removing magnetic material from a flowing fluid such as water by magnetic separation has a single set of electromagnets which are used with a plurality of magnetic filters for continuous magnetic separation operation alternately without obstructing the flow of the fluid being processed. A high-gradient magnetic filter arrangement which passes through a magnetic field generated by the magnets is made up of at least two magnetic filters separated by a watertight partition. When the fluid being processed is flowing through one of the magnetic filters, the other filter is removed from the flow of the fluid into a magnetic filter housing which is separated from the fluid flow through the magnetic filter by means of partitions. Backwashing of this other magnetic filter is carried out while purification of the fluid being processed by the former magnetic filter continues uninterrupted. Dummy magnetic filters are provided at the outer ends of the magnetic filter arrangement so that whichever of the magnetic filters is removed from the flow of the fluid being processed, the filter matrices do not leave the magnetic field formed by the plurality of magnets, and consequently the magnetic filters can be moved in and out of the magnetic field with a minimal driving force.

Magnetic purifying apparatus for purifying a fluid

In a fluidized bed filtering apparatus, for preventing particles of filtering material from entering into a feed pipe to clog the feed pipe and lowering the frequency of washing operations, a filtering material layer made of granular filtering material is supported by a supporting layer disposed in a filtering chamber so as to provide a space in the lower portion of the filtering chamber and two lines of a first feed pipe the outlet of which opens in the filtering material layer and a second feed pipe the outlet of which opens within the space are provided for feeding corrupt water into the filtering chamber.

Fluidized bed filtering apparatus

Growing community of inventors

Ibaraki-ken, Japan

Fumitaka Handa