SU1761228A1 - Foamy dust collector - Google Patents

Abstract

Use: capture dust with foaming properties. SUMMARY OF THE INVENTION: The dust collector comprises a housing with nozzles and a partition (4), a contact tube (7) with a centrifugal separator (8). Co-axially with the pipe (7), the additional pipe (9) is reinforced with the formation of a cavity (10). The upper part of the pipe (9) is provided with perforations.

Description

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The invention relates to dust-cleaning equipment and can be used to trap dust using foaming properties, such as in the manufacture of synthetic detergents and cleaning agents.

A foam scavenger is known, comprising a housing divided into upper and lower parts by a horizontal partition made with an inlet contact tube and a liquid layer, a centrifugal paddle type separator placed on the tube, a circulation loop with fluid return pipes communicated with the upper and lower parts of the housing .

The disadvantage of the device is its relative complexity and high dripping, which limits its use.

The closest known technical solution in its essence and effect achieved is a foam dust collector comprising a housing with inlet and outlet nozzles, a horizontal partition dividing the housing into cameos of contaminated and cleaned gas vertically placed in the central part of the housing and a contact pipe passed through the partition a centrifugal separator in the upper part, a pipe for supplying liquid to a horizontal septum and means for supplying liquid from the septum to the inlet part of the contact part Uba.

In this device, the gas entering the inlet part of the contact tube draws foam from the partition wall through the circulation tubes, as a result of which the foam is partially quenched to form a liquid, I irrigate

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slurry flow and dust binding. However, the intensity of dust binding due to the liquid formed as a result of the foam quenching remains insufficient due to the low intensity of the renewal of the phases, which does not allow achieving the required gas cleaning quality. At the same time, the foam does not have time to be extinguished in the contact tube and its significant part again goes through the separator to the horizontal partition, which increases its level and causes a part of the foam to be ejected into the outlet pipe with repeated gas pollution.

Installing additional pipes to remove excess foam from the apparatus makes the installation more difficult to operate and increases labor costs.

The purpose of the invention is to increase the efficiency of gas cleaning from foaming dust.

This is achieved by the fact that in a foam dust collector containing a housing with inlet and outlet nozzles, a horizontal partition dividing the housing into chambers of contaminated and cleaned gas vertically placed in the central part of the housing and a contact tube passed through the partition with a centrifugal separator in the upper parts, the fluid supply pipe to the horizontal partition and the means for supplying liquid from the partition to the inlet part of the contact tube, coaxially with the contact tube, is placed an additional tube with A cavity between them, the upper part of the additional pipe above the partition is made perforated and provided with a layer of filtering material, and in the entrance part of the contact pipe to its inner wall there is a screw-shaped blade, the cavity of which is communicated through the holes with the cavity of the contact pipe and the cavity between the pipes. , moreover, the specified cavity between the pipes is provided with a helical partition located at the level of the holes of the hollow helical blade.

Coaxial placement of the contact pipe with an additional pipe to form a cavity between them, making a perforated upper part of the additional pipe above the partition and supplying it with a layer of filter material, fixing the inlet part of the contact pipe to its inner wall of a hollow helical blade with the cavity of the contact tube and with the cavity between the pipes the supply of this cavity with a spiral partition, the placement of this partition at the level

the holes of the hollow helical blade allows to intensify the binding of dust in the inlet part of the contact tube and prevent excessive foam formation.

Figure 1 shows a diagram of a dust collector, a general view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1; in FIG. 4, node I in FIG. one.

Foam dust collector contains case 1 with tangential inlet pipe 2 and outlet nozzle 3, horizontal partition 4, dividing case into chambers 5 and 6 of polluted and cleaned gas, vertically placed in the central part of the case contact tube 7 with centrifugal separator 8 in the upper part.

Coaxially with the contact tube 7 is placed an additional tube 9 with the formation of the cavity 10 between them. The upper part of the additional pipe 9 above the partition 4 is provided with perforations 11 and a layer of large-pored filter material 12, for example, in the form of a fibrous gasket.

In the inlet part of the contact tube 7 to its inner wall, a means for supplying fluid in the form of a hollow helical blade 13 is fixed, the cavity of which is communicated through the holes 14 and 15 with the cavity of the contact tube 7 and with the cavity 10 between the tubes.

The cavity 10 between the pipes is provided with a helical partition 16, the upper plane of which is located at the level of the openings 15 of the blade 13. A branch pipe 17 for supplying fluid is attached to the housing. The lower part of the housing is provided with a nozzle 18 for draining the waste liquid.

Foam dust collector works as follows.

The gas containing foaming dust supplied through the tangential nozzle 2 to the bottom of the dust collector twists, with some of the dust deposited by the centrifugal forces on the walls into the liquid. Next, the vortex foam-liquid flow rises into the contact tube 7, where it is additionally twisted with a hollow helical blade 13. At the same time as the partition 4, the foam-liquid layer under the effect of discharge in the cavity 10 formed by ejection of the filter material 12 flowing around the opening 14 of the blade 13 intersects the filtering material 12, which is formed by ejection of the filter material 12 flowing around the opening 14 of the blade 13 crosses the filtering material 12, and the filtering material 12 is ejected by the ejection of the flow through the gas through the holes 14 of the blade 13 intersects the filter material 12, then through the discharge. in it and in the form of a liquid, it flows down onto a spiral-shaped partition 16, where through the holes 15 enters the cavity of the blade 13 and then through the holes 14 it is intensively sprayed in a rotating flow. As a result of the turbulization of a foam – liquid flow, intensive contact of dust with a foam – liquid medium occurs with simultaneous destruction of dust. The mixture rises into the centrifugal separator 8, where a further gas-gas-foam-liquid phase separation occurs. When leaving the blades of the separator 8, the speed drops sharply. The lighter phase is that the cleaned gas is directed through the nozzle 3 into the atmosphere, and particles of liquid and foam with dust absorbed in them under the action of centrifugal forces are thrown to the periphery and to the partition 4.

Due to the fact that the liquid-foam layer is drawn through a layer of coarse cellular filtering material, a high rate of quenching of the foam is provided with its transfer to a liquid, which allows an increase in the supply of liquid instead of foam to the inlet part of the contact tube. This, on the one hand, improves the conditions for the binding of dust in the upstream and, on the other hand, increases the damping of the foam in the stream. Since the additional spin is carried out by a helical blade with ejection of liquid from this blade, the intensity of the renewal of phases with dedusting increases.

Due to the fact that the liquid flows along a spiral-shaped partition 16 placed at the level of the openings 15, a uniform flow of liquid is provided through all the openings of the spiral and increases the uniformity of the irrigation flow.

The technical and economic efficiency of the proposed dust collector in comparison with the prototype is to improve the quality of gas cleaning up to 10-15% by increasing the intensity of dust collection during phase interaction in the inlet part of the contact tube by installing a hollow helical blade that provides the spraying of the resulting liquid deposition of foam as it is drawn through the developed surface of the filter element. At the same time, due to the effective quenching of the foam accumulating on the surface of the partition wall, its ejection through the outlet nozzle is prevented and at the same time the need for additional removal of the foam from the apparatus for its subsequent quenching is eliminated.

Claims (1)

Claims of Invention Foam dust collector comprising a housing with inlet and outlet nozzles, divided by a horizontal partition into the chambers of contaminated and purified gas, vertically placed in the central part of the housing and a contact pipe with a centrifugal separator in the upper part, passed through a horizontal partition and fluid supply means communicated with the clean gas chamber and placed in the inlet part of the contact tube, characterized in that increasing the efficiency of gas cleaning from foaming dust, it is equipped with an additional pipe placed coaxially to the contact pipe with the formation of a cavity between them and made in the upper part above the partition with perforation and with a layer of filter material, while the fluid supply means is in the form of a hollow helical blades communicated through the holes with the cavity between the pipes, which has a spiral-shaped partition placed at the level of the holes of the hollow spiral blade. Ј gpf D 2 Gmph 9/ / 9 J 8ZZIQLI Z hl vv 9 U