Patent ID: 6422735
Filing Date: 2002-07-23
Classification: B01F,C02F

Abstract:
Apparatus for injecting and mixing coagulant into a liquid stream by flash mixing comprising:a) a conduit for carrying the liquid stream without coagulant in a first direction; b) injection means having an outlet for injecting a fluid jet stream into the liquid stream; c) means for drawing off a portion of the liquid stream from a predetermined position along the conduit and for supplying the drawn-off portion to the injection means to form the fluid jet stream; d) a deflector disposed proximate to and in front of the outlet for deflecting the fluid jet stream in a second direction transverse to the first direction of the liquid stream, the deflector having a central axis and a passage coincident with the central axis, the passage having an opening at a position of the deflector which is closest to the outlet, for introducing the coagulant into the fluid jet stream such that the coagulant is carried in the second direction by the deflected fluid jet stream for mixing into the liquid stream; and e) means for conveying the coagulant under pressure into the passage, wherein the predetermined position is upstream of the deflector, such that the conduit is adapted for carrying the liquid stream with the coagulant mixed therein away from the deflector, thereby avoiding back mixing.