SU1527173A1 - Flotator - Google Patents

Abstract

The invention can be used in the petroleum, oil refining, chemical, gas and other industries. The purpose of the invention is to improve the quality of cleaning and increase the stability of the apparatus operation to pulsations of the treated water flow. The flotation cell contains a housing 1, divided into sections 2 by pairs of partitions 3 and 4 of different height, each subsequent in the course of the flow of the vapor of partitions below the previous one, which creates a condition for aeroflotation. In each section there is a foam container 5, communicated with the foam collector 6, and a node 7 for supplying the water-gas mixture. The flotation machine contains the input pipes of the cleaned 8 and output of the purified 9 water, the water supply unit 10 for recycling, the outlet pipe 11 for the sediment, a visor with an oleophilic material placed on it, attached to the back side of each partition 4. 3 Cp. 3 il.

Description

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The invention relates to wastewater and natural water treatment devices used in the petroleum, oil refining, petrochemical, chemical, gas and other industries.

The purpose of the invention is to improve the quality of cleaning by using the effect of aeroflotation and increasing the stability of the apparatus operation to pulsations of the flow of treated water.

Figure 1 schematically shows the flotation cell, section; figure 2 - node I in figure 1; Fig 3: a flotation cell with a spiral casing

The flotation machine contains a housing 1, divided into sections by 2 pairs of ZIL partitions, a foam collector 5 placed in each section, communicating with a foam collector 6, and a water-gas mixture supply unit 7, cleaned water inlet nozzles 8 and cleaned water supply outlet 9, cleared supply unit 10 water for recirculation and pipe 1I of sediment withdrawal. Each subsequent flow of steam through partitions 3 and 4 is performed below the previous pair of partitions. Partition 3 in each pair of partition 4 and installed with a gap of 12 relative to the bottom of the case. To the upper edge of each partition 4, on the back side, there is attached a visor 13 with a hole 14, under which the nozzle 15 is installed, communicated with a froth collector 6 (). On the visor 13 there is an oleophilic material 16, which covers the opening 14. The housing 1 can be made in the form of a spiral (FIG. 3).

The flotation cell works as follows.

Purified water enters through pipe 8 into section 2 of housing 1. Into the volume to be treated, through node 7, a water-gas mixture is fed into the lower part of section 2, from which gas is released in the form of small puffs. The gas bubbles pick up, trapping solid and liquid impurities, and form on the surface a layer of frothy product, which is discharged through the sump 5 to the suction collector 6.

Purified water passes through the gap 12 between the partitions 3 and 4,

steps through the upper edge of the partition 4 to the visor 13. When water moves along the goat, 13 oil impurities contained in it are trapped in

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The oleophilic material 16 and the outlet through the opening 14 and the nozzle 15 into the suction manifold 6. The pre-purified water is discharged from the visor 13 into the treated volume of the next section 2, drawing gas from the gas space of the housing 1 into the joint movement. in the form of bubbles, which carry away liquid and solid impurities and form a layer of foam product on the surface. At the same time, the treated volume is cleaned with a water-gas mixture leaving the node 7. The process is then repeated with

The finally purified liquid leaves the housing I through the pipe 9. Part of it through the node 10 is taken for recycling to the water gas mixture 7.

Each subsequent flow of a pair of partitions downstream of the previous pair makes it possible to create hydrodynamic conditions for the effect of aeroflotation (self-cleaning, cleaning with a waterfall) and makes the level of the processed volume in each section independent of the levels in the other sections, as a result of which the device becomes resistant to sharp pulsations of the flow of water supplied to the purification,

Attaching to the upper edge of each second partition of the goat from the side of the subsequent section enhances the aeroflotation effect by increasing the overflow line and formation. Making a hole with a pipe in the visor and placing an oleophilic material overlapping the hole on the upper surface of the visor allows for the separation of oil impurities from the water being purified as it flows from section to section.

The implementation of the housing in the form of a spiral makes it possible to increase the stability of operation of the apparatus under the conditions of pulsation of the flow of water supplied to the purification that moves in a spiral, and part of its kinetic energy is perceived by the walls of the apparatus.

Claims (1)

1. A flotation cell comprising a body divided into sections of pairs of vertical partitions, one of which