SU1567238A1 - Foam suppression device - Google Patents

Abstract

This invention relates to devices for breaking foam. The purpose of the invention is to improve the reliability of the device by eliminating the overgrowth of cells of perforated discs. The tank 1 has a working body for foam destruction, consisting of perforated spring-loaded disks 8 with cells 9. The disks 8 are mounted on the axis 10 with the possibility of axial movement by moving the sleeve 11. The working body is equipped with a nozzle in the form of rods 17, which are made of elastic material and rigidly fixed at one end on the fixed disk 18. The rods are oriented parallel to the axis 10 in the direction of the diffuser 7 and are held with a gap 21 through the cells 9 of the perforated spring-loaded disks 8. The other end of the rods 17 flax free and placed in the axial area between the diffuser 7 and the perforated disk 8. 1 Cp f-ly. 3 il.

Description

The invention relates to devices for the destruction of foam and can be used in chemical, construction and other sectors of the national economy, where technological processes are accompanied by the formation of foam that requires further destruction.

The purpose of the invention is to increase reliability by eliminating the overgrowth of cells in perforated discs.

FIG. 1 shows a foam quenching device, a general view (longitudinal section); in fig. 2- - working body, incision; in fig. 3 is a view A of FIG. 2

The device for extinguishing foam consists of a tank 1 with discharge pipes 2 and 3 for evacuating gas and liquid, a foam receiver 4, an ejector containing a nozzle 5, a mixing chamber 6 and a diffuser 7. In the tank 1 there is a working member for breaking foam from perforated spring-loaded discs 8 with cells 9 mounted on the axis 10 with the possibility of axial movement by moving the sleeve 11 Between the disks 8 are installed remote sleeves 12. The disks 8 and sleeves 11 and 12 are fastened with a nut 13 and a screw 14. On the axis 10 between the movable sleeve 11 and pack The spring 15 is installed spring 16. The working body is equipped with a nozzle in the form of rods 17, which are made of elastic material and rigidly fixed to one end of the fixed disk 18, which is mounted on the axis 10 stationary by means of a collar 19 and nut 20. The rods 17 are oriented parallel to the axis 10 the direction of the diffuser 7 and made with a gap 21 cells 9 perforated spring-loaded disks 8. The other end of the-rod 17 is made free and placed in the axial area between the diffuser 7 and the perforated disk 8 Axis 10 is fixed in the container 1 by the guide sleeve 22 and the screw 22 coaxially with the diffuser 7 of the ejector

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about 1

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The device operates as follows. The foam flows by gravity through the receiver 4 into the vacuum zone created by the ejector between the nozzle 5 and the mixing chamber 6. The working medium in the nozzle 5 of the ejector is compressed air. When it enters the vacuum zone, the air bubbles that form the foam partially break down under the action of excess pressure inside them. Next, the gas-foam flow enters the mixing chamber 6 and the diffuser 7, where the defoaming process is carried out due to the destruction of air bubbles under the action of a friction against the walls and a high speed of the ejected jet. Partly defoaming flow from the diffuser 7 is thrown out where, hitting the free ends of elastic rods 17, made console, causes their turbulent vibration, the amplitude of which at the ends of the rods 17 is maximum, due to which there is a partial destruction of air bubbles Moving further, the gas-stream flows onto the vibrating perforated discs 8, moving along with the sleeve 11 along the axis 10 reciprocally under the action of a pulp stream and springs 16. With a hard blow of air bubbles with particles of inclusions on the surface of the perforated disk 8, the final destruction of the foam occurs, since the flow of the mixture, hitting the surface of the disks 8, is divided into a multitude of streams forming turbulent vortices of the vortex, moving into the annular gaps 21 between the edges of the cells 9 of the disk 8 and the vibrating erases In this case, 17 are fragmented into a multitude of elementary streams, which are mostly destroyed with the formation of a contaminated solution and gas. Part of the streams that have passed through the annular gap 21 between the edges of the cells 9 and the rods 17 of the first perforated disk 8, meet another perforated surface on their way. The second disk 8, on which the final destruction of the foam occurs. The distance between the disks 8 is fixed by means of the spacer 13. As a result of the formation of a dirty solution during defoaming on the surface of the disks 8 and on

0

the edges of the cells 9 perforated discs

8, solid sediment is deposited, which is removed along with the solution by disrupting it due to a multitude of stress

the edges of the cells 9 of the rods 17, which vibrate turbulently in the passage zone through the cells 9 with an amplitude equal to the width of the annular gap 21 between the edges of the cells

9 and with the rods 17, wherein the stress zone, like the disks 8, moves back and forth along the length of the rods 17 as a result of the action of the flow of foam and spring 16 on the disks 8. Depending on the properties of the foam product, the number of perforated disks 8 is determined, necessary for the foam to break, the width of the spacers 12 and the distance from the diffuser 7 to the working body to adjust the intensity of the flow hit by the disks 8, which can be changed by loosening the screw 23 and moving the axis 10 inside 22 is the guide sleeve.

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Claims (1)

1. A device for extinguishing foam, including a container with an ejector supplying foam and liquid and gas branch pipes and a working unit located inside the container for extinguishing foam made in the form of axially mounted axially displaceable perforated spring-loaded disks with spaced sleeves between them , characterized in that, in order to increase the reliability of operation by eliminating the overgrowth of perforated cells disks, the working body is equipped with rods and a fixed disk fixed on the axis, with the rods at one ends rigidly fixed in the stationary disks oriented parallel to the axis and installed with a gap in the cells of the perforated disks, while the other ends of the rods are made free 2 A device according to claim 1, characterized in that the rods are made of an elastic material. 17 IB I ШЈ t FIG. 2 Bad a 21 2f Phage.Z