Injector mixer apparatus

• US 4,430,001 A
• Filed: 09/28/1981
• Issued: 02/07/1984
• Est. Priority Date: 12/26/1979
• Status: Expired due to Term

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Schurr, George A.
• Primary Examiner(s): Simone, Timothy F.
• Application Number:
  US06/306,593
• Time in Patent Office: 862 Days
• Field of Search: 366/11, 366/20, 366/35, 366/38, 366/40, 366/76, 366/96, 366/101, 366/106, 366/107, 366/133, 366/134, 366/154-156, 366/160, 366/167, 366/173, 366/177, 366/181, 366/182 , 366/341, 366/348, 366/349, 427/212, 427/213, 427/220, 427/221, 118/303
• US Class Current: 366/107
• CPC Class Codes: B01F 25/311 for mixing more than two components; Devices specially adapted for generating foam
• CPC Class Codes: B01F 25/72 with nozzles
• CPC Class Codes: B01F 33/404 for mixing material moving continuously therethrough, e.g. using impinging jets

Abstract

An apparatus and process for uniformly mixing a relatively small amount of material with a relatively large amount of another material in particulate form by introducing the smaller amount of material via a pipe within another concentric pipe through which a high pressure gas is introduced which thereby provides a zone of turbulence into which a particulate material in larger amounts is introduced, the mixture of gas and materials being transported through a treatment chamber to produce a uniform mixture.

Claims

1. An apparatus for uniformly mixing a relatively small amount of material with a relatively large amount of another material in particulate form comprising a conveyer-pipe treatment chamber with an entrance end, a feed opening and a discharge end, a nozzle for introducing a mixture of a high pressure gas and the relatively small amount of material to be mixed having a discharge end housed within the conveyer-pipe treatment chamber and means for feeding the particulate material into said feed opening in the conveyer-pipe treatment chamber, said nozzle comprising an inner tube, from which the relatively small amount of material exits, concentrically arranged within an outer tube to form an annular opening between the outer tube and the inner tube from which the high pressure gas stream exits, said inner tube being shorter than the outer tube to permit the contents of the inner tube to be affected by the contents of the outer tube before reaching the discharge end of the nozzle, said feed opening located to permit all the particulate material to enter above the nozzle discharge end, said nozzle discharge end located within the conveyer-pipe treatment chamber so that the longitudinal axis of the nozzle and the conveyer-pipe treatment chamber are parallel, said nozzle discharge end positioned in said conveyer-pipe treatment chamber so that the nozzle discharge end is beneath the feed opening to the conveyer-pipe treatment chamber and within a vertical projection of the feed opening so that at least some of the material in particulate form can freely fall by gravity across the discharge end of the nozzle, the conveyer-pipe treatment chamber having means to cause a flow of low pressure gas to enter and flow parallel to the flow of high pressure gas.

2. The apparatus of claim 1 wherein the discharge end of the nozzle is located at the center line projection of the feed opening to the conveyer-pipe treatment chamber.

3. A process for uniformly mixing a relatively small amount of material amounting to 0.05-6% by weight based on the mixture with a relatively large amount of another material in particulate form amounting to 99.95-94% by weight based on the mixture comprising injecting a high velocity gas stream into a conveyer-pipe treatment chamber while atomizing the small amount of material to be mixed into the high velocity gas stream by discharging the small amount of material from an inner tube within an outer tube or nozzle thereby atomizing the small amount of material before exiting the nozzle, the high velocity gas stream creating a zone of turbulence with the atomized material exiting the nozzle, adding the particulate material into the zone of turbulence, supplying a low velocity gas stream at the inlet to the conveyer-pipe treatment chamber parallel to the high velocity gas flow and conveying the gas and materials to be mixed through the conveyer-pipe treatment chamber, the ratio of high velocity gas to low velocity gas being more than 3:

1.

4. The process of claim 3 wherein the relatively small amount of material is in liquid form and the relatively large amount of another material is in solid particulate form.