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Disclosed is a liquid mixer having a multiplicity of slotted orifice plates spaced apart along the flow path within a chamber. Liquid passes through and exits from the slots at a 30-60 degree angle to the exit face of the orifice plates, thereby inducing turbulence which causes good mixing. Preferab

Disclosed is a liquid mixer having a multiplicity of slotted orifice plates spaced apart along the flow path within a chamber. Liquid passes through and exits from the slots at a 30-60 degree angle to the exit face of the orifice plates, thereby inducing turbulence which causes good mixing. Preferably the slots are radially disposed in circular orifice plates fitted closely within a cylindrical chamber. The radial length L of the slots is preferably five times the slot width T, and the spacing S of the orifice plates is 4-8 times the width. Straight slots are simplest to make but curved slots are preferred. Radial slots in a circular disc are preferred but other orientations are useful. When used for dispersing small volumes of water into oil, water is injected transversely into the oil upstream of the orifice plates, to cause initial droplet formation; and, the oil-water fluid velocity through the slots is kept in the range of 80-1600 feet per second.

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A liquid mixer for dispersing a second fluid into a first fluid comprised of a body having a chamber with a longitudinal axis, the chamber having a flow path for the flow of a comingled first fluid and second fluid therethrough along said axis; a plurality of orifice plates spaced apart along said a

A liquid mixer for dispersing a second fluid into a first fluid comprised of a body having a chamber with a longitudinal axis, the chamber having a flow path for the flow of a comingled first fluid and second fluid therethrough along said axis; a plurality of orifice plates spaced apart along said axis and fixedly held within the chamber; each orifice plate having an upstream face, a downstream face and a multiplicity of slot passages connecting the faces; each slot passage having a length L and a through-plate length D, both lengths at least two times the width T of the slot passages; and each slot passage shaped to discharge fluid at an angle of 30-60 degrees to the downstream face of the orifice plate.