SU1519750A1 - Apparatus for dehydration of suspensions - Google Patents

Abstract

The invention relates to separation technology, in particular to devices for mechanical dewatering of suspensions, and allows for improved productivity. A device for dewatering suspensions comprises a perforated drum 1 and a filtering chamber 2 mounted on frame 3 and made in the form of a wedge-shaped cavity with inlet and outlet branch pipes. A scraper 4 is disposed inside the filtering chamber for removing the thickened layer. The angle between the scraper 4 and the tangent to the surface of the drum 1 is 35-48 °. The filter chambers can be installed one after the other around the circumference of the drum and interconnected in series or in parallel. By installing the inlet and outlet nozzles at opposite ends of the chamber and the presence of a scraper 4 located at an angle of 35-48 ° to the tangential surface of the drum, the productivity of the device is increased by 1.5 times.

Description

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and (acquisition relates to separation technology, in particular to mechanical devices) for the multiplication of suspensions, and can be used, for example, in the whole, for dewatering slurry.

The purpose of the isobrepenin is nkroiz- (device characterization).

On fi |. 1 shows a device, side view, FIG. 2 same, front view;

in fig. 3. What are the movements of the suspension?

E filter chamber; in fig. 4 a section. A And in FIG. 3; in fig. 5P (K is an indicative connection of filter chambers; Fig. 6 is a parallel connection of filter chambers.

The dewatering unit contains a perforated drum 1 and a filter chamber 2 mounted on frame 3.

The filtering chamber 2 is made in the form of a wedge-shaped cavity. The forming surfaces of the filtering chamber 2 are parallel to the axis of the drum 1, the tip of the narrowing part of the camera 2 is directed against the turning of the drum 1. The filtering chamber 2 is equipped with a scraper 4 installed inside it. The angle between the scraper and the tangent to the top of the drum is 35 48. The filter chambers 2 are installed one after the other around the circumference of the drum and interconnected in series or in parallel, and the nozzles for insertion 5 and outlet 6 of the suspension are installed at opposite ends of the chamber.

Usg1) O1 (the device works in the following way: the suspension is fed through 5 into the filtering chamber 2. The liquid separates from the suspension through the filtering surface of the rotating perforated drum 1 and the suspension thickens. Moving to the branch pipe 6 for discharging the thickened suspension. In the direction of the blade, the wedge (K) of the cavity in the chamber against the rotation of the drum contributes to the creation of a gurbulent flow dewatering suspension, which washes away the sediment from the perforation of the drum, prevents its accumulation. (the collar 4 seals the chamber 2

four

filtering and cleans the surface of the drum 1. Experiments have established that the minimum angle between the scraper 4 and the tangent to the surface of the drum is 35-48 °.

5 As this angle decreases below 35 °, fibrous inclusions jam the gap between the drum 1 and the scraper 4. As the angle increases more than 48 °, the turbulence of the suspension flow in chamber 2 stops and

f- performance drops. Condensed-I flow (the suspension passes through several chambers arranged in series one after the other, and the suspension is dehydrated.

Due to the installation of pipes for the supply of suspension 5 and removal of 6 condensed fractions

15, at the opposite ends of the chamber and the presence of a scraper for cleaning the drum of fibrous impurities, the productivity of the device increases by 1.5 times. If several cameras are filtered, connect

consistently, then each

constitutes a separate dehydration stage, i.e. the condensable suspension in each of them is gradually dehydrated. If the filter chambers are connected in parallel, uv. The overall filter surface is molded. The series connection of the filtration chambers is preferable for dewatering thinner and parallel thicker suspensions.

thirty

Claims (2)

Invention Formula I. Device for dewatering suspensions, containing a rotating perforated drum and an adjacent filtering chamber made in the form of a wedge-shaped cavity with an inlet nozzle 5 suspensions, and a scraper for removing the thickened layer, characterized in that, in order to increase the productivity of the device, the filtering chamber is provided with a branch pipe for discharging the thickened suspension and 0 is directed with a point against the rotation of the drum, the inlet and outlet nozzles of the suspension are located at opposite ends of the chamber, and the scraper for removing the thickened layer is installed inside the chamber at an angle to the tangential surface 5 reels 35-48. 2. An apparatus according to claim 1, characterized in that the filtration chambers are installed one after the other around the circumference of the drum and are interconnected in series or in parallel. I hpc i || i || iM | 1H | 11 I l I i l. uliiiiiiaLUij r1 V N. v xX hX X h / h h X 4 4 h N.V V Yach G Gh WA --rx: 7W / :: V v v - l. V V l V, i l 1 l l V I l. Vjjjj 1 Fig.Z . X ii | i | i | i i i i i i 1h iI l i i i i i i i l - 5 111111 iiiiiiiiMii I III iiiiiii -4H-HtiiiiiiiniitiiiiiiiiiiiiH / i i i i i i i i i i i i i i i i i i i i i i i i i FIG. five ./ fii | iiiiiiiiiiiiii iiiiiiiii, iiiiiiiiiiiiiiiiiii | ii i ix s Wi ViViViViVi i i iWffWfW / : riiiiiiiiiiiiiiiiiI .i.i.iiii. iii i i i i FIG. 6