SU778761A1 - Centrifugal dispergator - Google Patents

Description

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The invention relates to devices for the preparation, homogenization and transportation of suspensions and can be used in petrochemical, chemical and food industry. Otsrash industrialism.

A centrifugal dispersant is known, which is a conventional centrifugal pump, the extensive use of which Q as a dispersant is explained by the possibility of combining in one device the operations of grinding a material suspended in a liquid, homogenizing the resulting suspension and transporting it 1.

The disadvantage of this centrifugal pump as a dispersant is the impossibility of obtaining finely dispersed suspensions, since the grinding of the initial 20 particles occurs mainly due to the shock effect experienced by the particles of the initial suspension during the vortex motion in the device case and at the exit from it. 25

It is also known a device for mixing or homogenizing various substances, also suitable for dispersing soft materials, and consisting, like a centrifugal pump, of

the cochlear body with axial input, the built-in external fixed perforated ring covering the impeller, on the KoTpoM reinforced internal perforation: a single ring, coaxial with the first and rotating with the impeller 2}.

The dispersion of the water suspension of the incoming material occurs mainly in the gap between the perforated mezvud rings, where the material enters through perforations (accelerating channels) of the internal rotating ring.

Through the perforations (accelerating channels) of the external fixed ring, the dispersed material, additionally homogenized, enters the outlet chamber and then into the discharge outlet pipe. The device also provides transportation of the finished product.

The disadvantage of this device is the low efficiency of dispersion of the suspension of granular materials. Related to the fact that the inner ring attached to the blade

j gqlece, prevents free

admission granules larger than the size of the holes (channels)

 BnMgensivenbgb dispersion, i.e. into the gap between the coaxial perforated rings. Distribution of granules due to

hitting the inner ring is inefficient, since the ring mounted on the wheel has a braking effect to the flows moving under the action of centrifugal sylles from the center of the impeller to the periphery, and the material strikes the ring not at maximum speed (the maximum speed the material would acquire when separated from a rotating wheel). For the same reason, the pumping effect of the device is reduced.

In addition, this device does not have the ability to control the degree of dispersion of the suspension, which eliminates the possibility of maintaining the mode of operation in optimal CONDITIONS.

The purpose of the invention is to intensify the dispersion process due to the incorporation of granules into perforated rings, as well as to change the degree of dispersion by adjusting the relative position of the perforated rings.

The goal is achieved by the fact that the TITO paddle wheel is mounted at a distance from the cylindrical surface of the inner perforated ring, and the outer perforated ring is placed on the outer cylindrical surface of the inner one and that the second perforated ring is rotatable relative to the first one.

FIG. 1 schematically shows a centrifugal dispersant, a cross-section; in fig. 2 is a section A-A in FIG. one; in fig. 3 - the node in FIG. one.

 Centrifugal diSpergatOp Consists of a cochlear body 1 with an axial nozzle for the entrance of the material. (Not shown) and a tangential pressure nozzle 2 for the exit of the product, a working paddle shaft 3 with vanes 4, mounted on the motor shaft (not shown), removed perforated ring 5, which covers the working impeller wheel 3 and CoCfolfltJeTO from the external perforated ring 6, fixed in operation and allowing for a fixed rotation on the defined 4-6 6: 1 circumference: first and third performance ring 7, rigidly fixed in the housing. Between the Shifts of the housing and the double perforated ring, an output chamber 8 is formed,

Dispersant works as follows. ,

The aqueous suspension of the hydrogel granules is sucked through the axial nozzle (not shown) into the cochlear body 1, picked up by a rapidly rotating (1500-3000 rpm) impeller wheel 3 and under the action of centrifugal forces is thrown into the annular gap between the impeller 3 and the internal perforated ring 7, where the granules are crushed and the suspension through the holes of the perforated rings 6.7 enters the outlet chamber 8 and then into the discharge pipe 2.

A change in the degree of dispersion of the suspension is achieved by rotating the ring 7 around the axis, which changes the degree of mutual overlap of the openings of the rings 6 and 7.

Thus, the device allows to intensify the process by better utilizing the energy of the centrifugal forces.

Claims (3)

1. Centrifugal dispersant For preparing suspensions of granular hydrogels containing a casing, accommodated coaxial perforated rings in it, one of which is fixed on a housing and a drive impeller axially mounted in the inner ring, characterized in that in order to intensify the dispersion process by rubbing the granules into the perforated rings, the impeller is set at a distance from the cylindrical surface of the inner perforated ring, and the outer perforated Oriented ring placed on the outer cylindrical surface of the inner .. 2. A disperser in accordance with claim 1, wherein it is such that, in order to change the degree of dispersion by adjusting the relative position of the perforated rings, the second perforator has a fixed ring pivotally relative to the first. Sources of information taken into account in the examination 1.Shterbachek 3., Tausk 1G. Mixing in the chemical industry L., 1963, p. 279,366. 2. The patent of Germany No. 1233365, cl. 12 e 4/01, 09.21.72. (rig.} A A