Agitating – Having specified feed means – Liquid injector within mixing chamber
Patent
1990-07-06
1992-02-18
Coe, Philip R.
Agitating
Having specified feed means
Liquid injector within mixing chamber
366279, 366286, 366305, B01F 702, B01F 1500
Patent
active
050888315
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a device for treating material mixtures. More particularly, the present invention relates to apparatus for treating material mixtures which includes a pair of conically shaped inner and outer treating members which are relatively rotatable with respect to each other.
BACKGROUND OF THE INVENTION
The use of a pair of inner and outer treating members, preferably conical, and which are rotatable relative to each other, is known. By utilizing these types of treating members, different materials can be mechanically processed, dispersed and/or mixed. For example, organic or inorganic fibers or particles can be dispersed in gaseous or fluid media, such as air, steam, water, etc. Also, chemicals such as colorants, bleaching agents, binding agents, etc., can be admixed therein. Conventional mixing members of this type have a number of variants, including rotating and counter-rotating disk-shaped or conically shaped rotation bodies, which are provided with treating surfaces showing different patterns of recessed and elevated portions, which produce the turbulence and agitation required to perform their intended function.
When certain chemicals, such as binding agents, are added to fiber mixtures, difficulties normally arise due to coatings being applied and/or clogging of these grooved patterns of the treating surface. Furthermore, these coatings and such clogging are difficult to remove, and after a certain period of operation they can prevent the proper functioning of the mixer. In that case, the mixer has to be taken out of operation for cleaning purposes, which, in turn, causes repeated stoppages, and thus results in production disturbances.
The only manner of overcoming these interruptions has been to install extra mixing devices, to which the fiber flow can thus be transferred during the time when the clogged machines are being cleaned and restored to their operational state. This procedure is expensive, both in terms of manual service and the extra investments required therefor.
SUMMARY OF THE INVENTION
In accordance with the present invention, these and other difficulties have now been overcome by the invention of apparatus for the treatment of material mixtures which comprises an inner treating member having an outer treating surface, and a corresponding outer treating member having an inner treating surface, and surrounding the inner treating member so as to provide a gap therebetween, such that the material mixture can be fed through the gap for treatment between the inner and outer treating surfaces, the inner and outer treating members being relatively rotatable with respect to each other, at least one of the inner and outer treating surfaces including a plurality of longitudinally extending grooves, and cleaning means for cleaning the plurality of longitudinally extending grooves, the cleaning means comprising projection means extending into the longitudinally extending grooves and being movable along the longitudinally extending grooves so as to clean the material mixture therefrom. In a preferred embodiment, the inner and outer treating surfaces are both conically shaped.
In accordance with a preferred embodiment of the apparatus of the present invention, at least one of the inner and outer treating surfaces includes a plurality of longitudinally extending bars defining the plurality of longitudinally extending grooves, such that the cleaning means are provided between the plurality of longitudinally extending bars.
In accordance with one embodiment of the apparatus of the present invention, the at least one of the inner and outer treating surfaces comprises the inner treating surfaces. In a preferred embodiment, both the inner and outer treating surfaces include a plurality of longitudinally extending grooves, and the cleaning means comprise first cleaning means including first projection means extending into the longitudinally extending grooves in the inner treating surface, and being movable along the longitudinally extending grooves in
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Coe Philip R.
Sunds Defibrator Industries Aktiebolag
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