SU1481207A1 - Arrangement for collecting flotation slime - Google Patents

Abstract

The invention relates to devices for collecting the sludge collected from the surface of the liquid to be cleaned in flotation installations. The purpose of the invention is to increase the efficiency of collecting and dewatering flotation sludge. The device comprises a foam collecting box, the bottom of which is made in the form of particles of a cylinder, the box is equipped with a chamber for collecting liquid horizontally mounted with a gap to the wall of the box, pneumatic lines in the chamber and under it, with a forming element with a cylindrical shoulder located on its lower edge. The element is located above the upper wall of the chamber with a gap, the value of which is adjusted depending on the moisture content of the sludge. The device moves along the surface of the accumulated sludge, cutting and collecting the least wet part of it with the plane of the upper wall of the chamber, which, the passage under the layer-forming element, forms a layer of a given thickness. Due to the vacuum in the chamber created by a vacuum pump on the surface of the upper wall of the liquid collection chamber, which is made of filter material, the sludge dewaters. The dried sludge also comes under the action of a vacuum to the bottom of the box, from where it is discharged through the pneumatic line. 1 hp f-ly. 2 Il.

Description

one

The invention relates to devices for collecting the sludge collected from the surface of the liquid to be cleaned in flotation installations.

The purpose of the invention is to increase the efficiency of collecting and dewatering i flotation sludge.

Figure 1 shows the device, a General view in axonometry; figure 2 - section aa in figure 1.

The device contains penosboronny box 1 formed by vertical

walls 2 - 4 and the bottom 5, having the form of part of a cylinder. In the box 1, a horizontal chamber 7 for collecting liquid is installed with a gap 6 to the vertical wall 2. The upper wall 8 of the chamber 7 is made of filter material. The upper part of the box 1 communicates with the bottom 5 by means of funnel-shaped nozzles 9 placed in the gap 6. In the chamber 7 and below it in the bottom 5 there are pneumatic lines 10 and 1J, respectively, for

removal of sludge and for removal of fluid, connected to a vacuum pump.

Above the upper wall 8 of the chamber 7 is mounted with an Easor 12 a layer-forming element 13, the lower edge of which is provided with a cylindrical bead 14.

The element 13 is fixed on the vertical side walls 3 and 4 of the box I with the possibility of rotation around the horizontal axis 15 and fixing it with the help of nuts 16 and 17 of fixation.

The device works as follows.

When the device is moving in the float layer of sludge, the upper wall 8 of the chamber 7 cuts and collects the least wet part of the sludge without mixing, since the bottom 5 of the box 1 is made as part of a cylinder, which allows the box 1 to move along the surface without causing turbulent processes . The cut slurry with the help of the element 13 is formed in the form of a layer, the thickness of which is specified by the gap 12. This ensures effective dewatering of the entire volume of the collected sludge. In the chamber 7 and in the bottom 5, a vacuum is created using a vacuum pump. This causes dewatering of the slurry layer passing through the upper wall 8 in chamber 7, through which the liquid released from the slurry passes through the porous surface into chamber 7, from where it is removed via pneumatic line 10

The dehydrated sludge through the pipes 9 enters the bottom 5 of the box, from where it is discharged through the pneumatic line 11.

When the composition or wet slime changes, the gap 12 is reduced or enlarged by moving the element

;

Q

five

0 5 Q

five

0

13 around the horizontal axis 15 and with its subsequent fixation with nuts 16 and 17.t

Supplying the lower edge of the element 13 with a cylindrical bead 14 reduces turbulence in the slurry layer passing under it, thereby forming it in a uniform layer.

In order to periodically clean the filter material of the wall 8 of the chamber 7, it is provided with purging it with compressed air. i

The application of the proposed device allows to increase the efficiency of collecting and dewatering sludge and to ensure separate transportation of the liquid and solid phases of the sludge under the action of vacuum, to eliminate mixing of the sludge on the surface of the liquid.

Claims (2)

1. A device for collecting flotation sludge, including a foam collecting box formed by vertical walls and a bottom, characterized in that, in order to increase the efficiency of collecting and dewatering the sludge, the bottom of the collecting box is made as part of a cylinder, equipped with a clearance box to its vertical wall by a horizontal chamber, the upper wall of which is made of filter material, by pneumatic lines placed in and under the chamber, by a layer-forming element mounted with a cavity to the upper wall of the chamber with the possibility of adjusting the gap. 2. A device according to claim 1, characterized in that the lower edge of the layer-forming element is provided with a cylindrical collar. . . .      „     ". . . .  one . . v; -: 4zЈ MSH № && $ & ЩЩ: I SSH / h 01 6 ". . : g Ј1 S n a and and 1 & f m Ј1 51  LI