Patent ID: 6431528
Filing Date: 2002-08-13
Classification: B01D,B01F,B01J,C02F

Abstract:
An apparatus for removing impurities in liquid, comprising:a liquid supply mechanism configured to supply liquid containing impurities; a gas supply mechanism configured to supply gas for removing the impurities from the liquid; and a static mixer arranged so that a longitudinal direction of the static mixer is vertical, the static mixer connected to the liquid supply mechanism at an upper end portion of the static mixer to receive the liquid and to the gas supply mechanism at a lower end portion of the static mixer to receive the gas, the static mixer including a plurality of mixing elements each comprising a passage tube through which fluid is capable of passing and a plurality of porous spiral blades arranged inside the passage tube, the plurality of mixing elements being provided continuously or through one or more spacers such that the porous spiral blades are twisted in the right and left directions alternately in the longitudinal direction thereof, the porous spiral blades each having a plurality of pores whose diameters are between 5 mm and 30 mm and total porous area is between 5% and 80%; wherein the liquid drops down inside the static mixer and the gas rises up inside the static mixer so that the liquid and gas are subjected to gas-liquid contact inside the static mixer and the impurities are gasified or reacted with the gas, whereby the impurities are separated from the liquid and discharged together with the gas.