SU1627260A1 - Flotation apparatus - Google Patents

Abstract

The invention relates to the flotation separation of multiphase mixtures. Purpose - to improve the performance of the flotation process by optimizing its hydro and aerodynamic conditions. The cylindrical body consists of successively placed one above the other chambers (K) 1 of the feed of the clarified suspension with the nozzle (P) 8 for its introduction, K 2 for supplying air from P 9 to enter it, K 3 to discharge the clarified slurry from P 10 to its outlet and K 4 to receive foam from P 1I

Description

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for removal of foam. Inside the hull coaxially installed flotation K 5 with perforated walls. In K 1 there is a swirler 12, made in the form of a solid disk, on the upper surface of which at an angle to the radius are located the blades, and mounted for vertical movement along the axis of the body. The final inner section K 5 is made in the form of a truncated cone, facing a smaller base in the direction of its initial section. At the outlet of K 5 with a possibility of vertical movement along the axis of the body, a divider II of the suspension flow is installed. The divider 13 is made in the form of a cylinder, the initial outer section of which is made in the form of a truncated cone, facing a smaller base toward the initial section K 5. In the upper part of the divider 13, holes 14 are made at an angle to the radius for foam extraction. Through P 8 the pulp enters K 1, where

It is accelerated by means of a swirler 12 and enters K 5. Through P 9 compressed air is supplied to K 2, which through perforations at the junction enters K 5 in the form of bubbles. The formed float complexes float up and through the holes 14 enter as foam in K 4, from where they are removed through PP. The clarified suspension enters K 3 through perforations in the K 5 junction and the gap between the final inner section K 5 and the outer initial

divider section 12. From K 3, the clarified suspension is removed through P 10. 1 h. n. f-ly, 3 ill.

The invention relates to the flotation separation of multiphase mixtures, in particular, to devices for its implementation, and can be used to thicken bio-suspensions in the microbiological industry, in wastewater treatment and processing of ore and nonmetallic raw materials.

The purpose of the invention is to improve the performance of the flotation process by optimizing its hydro and aerodynamic conditions.

FIG. 1 shows a flotation apparatus with a discharge of the central part, frontal view; in fig. 2 is a section A - A in FIG. one; in fig. 3 is a section BB in FIG. one.

The flotation apparatus also consists of a cylindrical body formed from chambers located one above the other. Below is the supply chamber 1 for the clarified slurry, above it is the chamber 2. for supplying air, above which, in turn, is the chamber 3 for draining the clarified slurry, above which is the chamber 4 for receiving foam inside the housing, coaxially with it the flotation chamber 5 with perforated walls In chamber 1 for supplying air to the wall of the flotation cell 5, perforation 6 was performed to disperse the air, and in the wall section of the flotation cell 5 in the chamber 3 of discharge of the clarified slurry perforation 7. To withdraw a portion of the clarified slurry, the end inner section of the flotation chamber 5 is made in the form of a truncated cone, with a smaller base facing down to the initial section of the flotation chamber 5. To each of the cylindrical chambers 1-4 for supplying clarified 0

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Corresponding nozzles are attached to the outside of the suspension, air supply, removal of the clarified suspension, and receiving foam: the nozzle 8 for introducing the clarified suspension, the nozzle 9 for introducing air, the nozzle 10 for withdrawing the clarified suspension, and the nozzle 11 for withdrawing the foam. A swirler 12 is arranged in the chamber for supplying the clarified slurry to impart a rotational movement to the slurry flow. The swirler 12 is arranged in the form of a solid disk, on the upper surface of which at an angle to the radius there are blades mounted with the possibility of vertical movement along the axis of the housing. At the exit of the flotation cell 5, coaxially, in chambers 3 and 4 for separating the clarified slurry and receiving foam there is a slider 13 of the slurry stream, in the upper part of which holes 14 are made at an angle to the radius for foam withdrawal. The splitter 13 of the slurry flow is made in the form of a hollow cylinder with an initial outer section in the form of a hollow truncated cone, facing a smaller base down towards the initial section of the flotation cell 5, and mounted with the possibility of vertical movement along the axis of the hull.

Flotation apparatus operates as follows.

The initial unclarified suspension through the inlet 8 for entry enters the chamber 1 at a certain speed. In chamber 1, the flow rate of the clarified liquid increases due to the rotation of the swirler 12, and the magnitude of the change in the flow rate of the pulp is determined by the height of the swirler 12. Simultaneously with the supply of the clarified slurry into the chamber 2 for supplying air through the nozzle 9 under excess pressure 0.11- 0.15 MPa compressed air enters, which, passing through the perforation holes 6, in the form of bubbles enters the flotation cell 5, where due to the action of centrifugal forces intensive mixing of the bubbles veterinary suspension. Collision-formed flotation complexes move to the axis of rotation and float. Part of the clarified suspension from the flotation cell 5 through the perforation holes 7 enters the chamber 3 for its removal, and the remaining part is brought there through the gap between the final inner section of the flotation chamber 5 and the initial outer section of the flow divider 13. Due to the possibility of moving the flow divider 13 along the vertical axis, the size of the gap is controlled, and hence the quality in the cleaning of the suspension From the chamber 3 of the outlet, the clarified suspension through the pipe 10 is removed from the apparatus Foam formed of sphlograted particles and air bubbles, through the holes 14, the divider 13 enters the chambers 4, from where it is removed through pipe 11

Claims (1)

Invention Formula  A flotation unit comprising a cylindrical body consisting of postfigures 0 0 five chamber of supply of a clarified suspension with a pipe for its input, chamber of air supply with a pipe for its input, chamber for removal of a clarified suspension with a pipe for its withdrawal, camera for receiving foam with a pipe for its removal located inside the housing coaxial to it is a flotation cell with perforated walls, a swirler. installed in the supply chamber of the clarified suspension, from gichayu.tsii so that, in order to improve the performance of the flotation process due to the optimization of its hydro and aerodynamic CONDITIONS, the device is equipped with a suspension flow divider installed at the exit of the flotation cell with the ability to move si of the case and made in the form of a hollow iliilderr of the upper part of which, under the ANGLE to the radius, there are holes for hatching, the swirler is made to move along the axis of the case in the form of a solid disk on which Angle to the radius fixed blades 2 The apparatus according to claim 1, which is based on the fact that the lower outer portion of the divider and the upper inner portion of the flotation cell are made in the form of truncated CONES, facing smaller bases towards the swirler EIGZ