UPWARD-FLOW MANGANESE CONTACT COLUMN

摘要

The present invention provides an upward-flow manganese contact column for feeding raw water to a manganese catalyst-packed layer 3 through a plurality of dispersion nozzles 8 provided at the upper surface of a chamber 2 by forming the chamber 2 for allowing raw water to flow in at the bottom of a column body 1 into which a granular manganese catalyst is packed. Each dispersion nozzle 8 has an umbrella portion 12 above a perpendicular nozzle body 9, and the umbrella portion 12 is configured so that the lower end of the umbrella portion 12 is elongated below the upper end of the nozzle body 9. Raw water is supplied to the entire manganese catalyst-packed layer from the lower end of the umbrella portion 12 of each dispersion nozzle 8. It is capable of exhibiting stable treatment ability for a long time by suppressing particles of the manganese catalyst from being worn by collisions of the particles.