Device for dispersing, suspending or emulsifying gases, liquids

Details Device for dispersing, suspending or emulsifying gases, liquids Device for dispersing, suspending or emulsifying gases, liquids

1994-05-09

1996-07-30

Scherbel, David

Agitating

Having specified feed means

Plural related feeders having separate outlets to mixing...

366304, B01F 700

Patent

active

055404995

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a device for dispersing, emulsifying or suspending gases, liquids or granular substances, more particularly for wetting and dispersing powders in liquids. The operation or efficiency of a device of this kind usually depends on its ability to handle substances which are difficult to process. If the device can process these substances, it is usually also suitable for treatment of easily-processed substances. Powder is considered a substance difficult to process. Clogging may occur when powder is conveyed through the device, since powder tends to form bridges which are the cause of clogging in many cases. The risk of clogging when processing a powder is particularly great when the powder is wetted with a liquid. This can be explained in that, on the first wetting contact, the powder or parts of the powder are only slightly moistened, whereafter the tendency to coagulate, form bridges and stick to walls of the device is particularly great.
Devices of the above-mentioned kind have already been developed in a number of forms, such as agitators, immersed during operation in a container holding the substance or substances to be processed, or devices comprising a closed working chamber through which the substance or substances for processing are conveyed during operation.
DE-OS 27 02 183 discloses a device in the form of an agitator, the substance for processing being sucked in parallel to the axis of rotation of the rotor, and radially ejected by a dispersing device in the form of shearing rims disposed in the flow direction downstream of the bladed rotor. In this known device, there are no guide devices which enable the supply of different substances separately to the bladed rotor.
German Offenlegungsschrift 30 02 429 describes a device for dispersing gas, powder and fluids having an agitator or jet blender, in which two separate supply pipes for the substances to be processed extend coaxially into the bladed-rotor region, through a jacket surrounding the rotor shaft, so that the substances can be fed into the bladed-rotor region separately from the product material found within the revolution of the agitator.
U.S. Pat. No. 3,194,540 describes a device for homogenizing a substance and comprising a number of rotating shearing rims disposed coaxially with one another in a casing. The substance for processing is axially supplied relative to the rotor axis, radially expelled through the shearing rims, and then discharged from the casing.
A device comprising two inlets on one side of the rotor has already been proposed for dispersing or emulsifying at least two media or substances which tend to change their state on mutual contact. The substances are guided radially outwardly through a dispersion device comprising two shearing rims rotating relative to one another. The media flow in separate ducts, the ducts alternating in the peripheral direction, until the media enters the internal shearing rim.
A common shortcoming of the known devices is that owning to the complicated piping for supplying the substances, they are not suitable for processing powders or granular substances because of disturbances to the through-flow of material, clogging and production failure. The dispersion process is also unsatisfactory.
A device of the above-mentioned kind is described in German patent publication C-501 546. In this device for generating foam for fire-extinguishing purposes, substance inlets, for supplying water and a dry chemical, are disposed on the two sides of a disc-shaped rotor in the form of an impeller. The inlets are initially directed axially towards one another and then radially directed. An annular duct is disposed at the rotor periphery. During operation of the device, the water and dry chemical are pressed by the centrifugal force into the annular duct.
The object of the invention is to improve the mechanical action on the substances and consequently improve the comminution, fine division, dispersion, emulsification and/or suspension.
This object is achieved by a device including a disc-sha

REFERENCES:
patent: 2071393 (1937-02-01), Doherty
patent: 2619330 (1952-11-01), Willems
patent: 3183099 (1965-05-01), Schultz
patent: 3194540 (1965-07-01), Hager
patent: 3195867 (1965-07-01), Mould, Jr.
patent: 3256181 (1966-06-01), Zingg et al.
patent: 3393802 (1968-07-01), Logue et al.
patent: 3606270 (1971-09-01), Zimmerly
patent: 3934857 (1976-01-01), Hege
patent: 4136971 (1979-01-01), Varlamov
patent: 4687339 (1987-08-01), Seeger
patent: 4915509 (1990-04-01), Sauer
patent: 5085513 (1992-02-01), Ivarson
Verfahrenstechnik 1992, No. 3.
Wittnerberger, Chemische Betriebstecnik, Springer-Verlag, S. 243/244.
Ullmanns Encyklopadie der technischen Chemie, 4. Auflage, Band 2, (Verfahrenstechnik I) Verlag Chemie.

Affiliated with

Also associated with

Rating

Device for dispersing, suspending or emulsifying gases, liquids does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for dispersing, suspending or emulsifying gases, liquids , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for dispersing, suspending or emulsifying gases, liquids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1654019