SU923627A1 - Cetrifugal machine for filtering suspensions through subsidery substance layer - Google Patents

Description

The invention relates to equipment for the separation of suspensions in the field of centrifugal forces, namely, to filter centrifuges with screw discharge of sediment, and can find application in the field of wastewater treatment, chemical, food and other industries.

Closest to the present invention is a centrifuge for filtering suspensions through an auxiliary layer containing a cone-shaped perforated rotor, an auger consisting of a drum with openings for feeding the divided suspension into the rotor and an auxiliary suspension and coils fixed on the drum [1] ..

The disadvantage of the centrifuge is a significant ablation of solid particles with the filtrate. This is due to the fact that it is advisable to filter through a thick layer of auxiliary substance, and the known centrifuge does not provide this: in it there are possible 2

filtering teas through. a very thin layer of excipient.

The purpose of the invention is to reduce the entrainment of solid particles with the filtrate.

This goal is achieved ^{5 by the} fact that in a centrifuge containing a cone-shaped perforated rotor,

an auger consisting of a drum with openings for feeding a divided suspension and an auxiliary suspension into the rotor, and

¹⁰ turns mounted on the drum, the turns of the screw are mounted on the drum in such a way that their projections onto the rotor wall perpendicular to its axis overlap with similar projections of windows in the drum, serving to feed the rotor into the split suspension.

FIG. 1 shows a centrifuge in a variant for processing sludge rolling down on the rotor surface, a longitudinal section; in fig. 2 the same, in the variant for the treatment of sediments that do not roll down over the surface of the rotor.

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The centrifuge includes a perforated rotor 1, an auger consisting of a drum 2 and coils 3 fixed on it, feeding a pipe 4 for feeding an auxiliary suspension. In the cavity _{5 of the} drum 2 of the screw there is an annular tray 5 into which slurry to be separated is fed through the pipe 6, and in the wall of the drum 2 there are windows 7 for passing the auxiliary suspension into the rotor and windows 8 for feeding the rotor of the split suspension, communicating The coils and tubes 9 with a cavity of the annular tray 5. The coils 3 of the screw are reinforced on the drum 2 in such a way that the projections of them (segment AC) on the wall of the rotor perpendicular to its axis cover similar projections of windows 8 (segment AB) in the drum, which serve _m feed to the rotor shared suspension.

The centrifuge works as follows.

Auxiliary suspension enters the drum 2 of the screw through the pipe 4 and through _{25 of the} window 7 enters the cavity of the rotor 1, where it is divided. The centrifuge passes through the perforation of the rotor 1, and the sediment is transported by coils 3 of the screw toward the large base of the rotor 1. Those ₃₀ deposits that spontaneously roll along the surface of the rotor form during transport a roller adjacent to coils 3 on the side of the smaller base (they use a variant of centrifuge , Fig. 1). Those precipitates that do not spontaneously roll over the rotor surface form during transportation a roller adjacent to the coils 3 on the side of a larger base (they use the centrifuge variant, fig. 2). The suspension to be separated enters through the pipe 6 into the cavity of the annular tray 5, the drum 2 of the screw, ₄₅ where it comes from through the channels, tubes 9

and the window 8 is fed into the cavity of the rotor 1. The selected location of the turns of the screw and the window 8 ensures that the divided suspension enters the sediment layer. The dispersion medium of the divided suspension passes through a layer of sediment transported by the windings' 3, and is removed from the centrifuge through the perforation of the rotor 1. The dispersed phase of the divided suspension is delayed by the precipitate and removed from the centrifuge along with it.

The proposed centrifuge allows efficient dewatering of excess activated sludge, obtained at the wastewater treatment plants of industrial complexes, through a layer of sludge of manure from the same industrial complexes.

The proposed centrifuge is easier known and constructive, and in operation, which is important for the equipment of livestock farms.

Claims (1)

Claim Centrifuge for filtering suspensions through an auxiliary substance layer containing a cone-shaped perforated rotor, an auger consisting of a drum with windows for feeding a divided suspension into the rotor and an auxiliary suspension, and coils fixed on the drum, in order to reduce entrainment of solid particles the filtrate, the turns of the screw are mounted on the drum in such a way that their projections on the rotor wall perpendicular to its axis overlap with similar projections of windows in the drum, serving for feeding into the rotor shared with spenzii.