Side entry fluid mixing

Agitating – Stirrer within stationary mixing chamber – Rotatable stirrer

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Details

366103, B01F 706, B28C 508

Patent

active

052036308

ABSTRACT:
In order to circulate a two-phase system (a suspension of solid particles in liquid) in a large (e.g., 100 ft. diameter) and shallow tank (e.g., where the liquid level, Z, to tank diameter, T, ratio is 0.4), a cluster of side entering mixers is used and a desired flow pattern (much like that obtained from a top entering mixer) along the bottom and top of the material in the tank and vertically along the walls of the tank is obtained by (a) rotating an end mixer in the cluster in opposite sense to the other mixers, (b) spacing the mixers so that the interference is reduced between the flow produced by the mixers at the wall of the tank opposite from the mixers, and (c) by tilting the mixers so that the flow intersects the bottom near the wall of the tanks opposite from the mixers. It is believed that the system geometry and direction of rotation of at least one end mixer in the cluster prevents the development of angular momentum of the material in the tank thereby avoiding swirling thereof and consequent asymmetrical, nonuniform flow patterns which are not optimum for particle suspension.

REFERENCES:
patent: 1621071 (1927-03-01), Kinkade
patent: 2116099 (1938-05-01), Chamberlain
patent: 2854223 (1958-09-01), Lee
patent: 3588274 (1971-06-01), Norlindh
patent: 3770251 (1973-11-01), Herfeld
patent: 3787284 (1974-01-01), Richter
patent: 4325642 (1982-04-01), Kratky
patent: 4468130 (1984-08-01), Weetman
patent: 4606648 (1986-08-01), Coyle
patent: 5118199 (1992-06-01), Howk
VQ Series Side-Entering Mixer Product Literature (1989).

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