Agitating – Stirrer within stationary mixing chamber – Rotatable stirrer
Patent
1977-01-10
1982-04-27
Coe, Philip R.
Agitating
Stirrer within stationary mixing chamber
Rotatable stirrer
366297, B01F 706
Patent
active
043268110
ABSTRACT:
A new mixing vessel is disclosed, which vessel enables a sizable saving of the energy required for the mixing compared with the conventional mixing vessel. The vessel comprises a propeller disposed adjacent to the side wall of a cylindrical tank disposed horizontally, which propeller generates a thrust tangential to the cylindrical vessel wall that creates the mixing motion of the slurry rotating about the axis of the cylindrical vessel. In said arrangement of the cylindrical vessel and the propeller, the propeller shaft is perpendicular to the vessel axis. Therefore, two or more propellers mixing slurries in two or more vessels can be driven by a single shaft disposed through the horizontal cylindrical vessels disposed in a parallel alignment. The bearing supporting the head-end of the driving shaft can be enclosed within a flange sealed with a blind flange, which flange is disposed onto the first mixing vessel in line with the spools housing the shaft. A choke with an annular opening provided by the gap between the shaft surface and the inner surface of the spool disposed on the exit end of the last mixing vessel can be used to restrict the mass flow out from the train of the mixing vessels. The surfaces forming the choke should be lined with an abrasion-resisting material. The bearing supporting the tail-end of the shaft, which is the driven-end, is disposed outside the mixing vessel and away from the slurry discharged through the annular opening of the choke. This arrangement enables to completely eliminate the seals in mechanically agitating the slurries in pressurized vessels.
REFERENCES:
patent: 1246003 (1917-11-01), Headley
patent: 2108990 (1938-02-01), Morlock
patent: 2835481 (1958-05-01), Cox
patent: 3035543 (1962-05-01), Duncan et al.
patent: 3498754 (1970-03-01), Yamashita et al.
patent: 3608871 (1971-09-01), Harsanyl
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