RU2559494C1 - Aerator - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to cleaning of effluents and can be used for biological treatment of effluents in aerotanks with active mud. Aerator opposed lengthwise solid sections of resilient hose are partially interconnected to make a two-layer horizontal band with lengthwise mirror axis aligned with lengthwise mirror axes of said lengthwise solid sections. The latter are contracted by fasteners between lengthwise stiffness elements to make two equal tubular perforated resilient membranes on both sides of two-layer horizontal band to horizontal parallel axes. Note here that hose round cross-section cavity is divided into two cavities of round cross-section. This allows the production of two parallel lengthwise air efflux peaks at air dispersion simultaneously from two tubular perforated membranes of aerator. This allows improvement of fluid aeration owing to expansion of finely dispersed aeration zone on both sides of each lengthwise peaks of aeration instead of one lengthwise peak.

EFFECT: higher efficiency of fluid aeration.

3 cl, 5 dwg

Description

The improvement relates to wastewater treatment technology and can be used in biological wastewater treatment in activated sludge aeration tanks.

Known aerator containing an elastic tubular perforated membrane with an axis of symmetry lying in the horizontal plane (see US Patent No. 7044453, Int. Cl. B01F 3/04).

The known aerator has a rigid frame inside the cavity of an elastic tubular membrane, which complicates the design, installation of a tubular aerator. In addition, the rigid elements of the frame create conditions for the clogging and biofouling of the inner cavity of the aerator, which leads to a deterioration of its technical parameters and a decrease in the efficiency of aeration of the liquid over time during operation of the product.

Also known aerator comprising a flexible tubular membrane in the form of a tube having two diametrically oppositely disposed along the sleeve longitudinal perforated portion and adjacent to them two diametrically oppositely disposed along the sleeve longitudinal unperforated portion (see DE 10203780 A1 patent, int Cl ^7:... B01F 5/06, C02F 7/00, published 04.09.2003).

In a known aerator, a sleeve covers the internal elements of longitudinal stiffness contained therein, for example, rods or boards, the upper face of which is located in a horizontal plane, and the side faces are located in vertical planes.

The objective of the improvement is to increase the efficiency of liquid aeration due to fine aeration by liquid air bubbles, the possibility of self-cleaning of the aerator from clogging and reducing the biofouling of its elements, simplifying the design of the aerator and its attachment points when mounted in an aeration tank, eliminating the deflection of the perforated portion of the membrane, increasing the distance between the supports.

The problem is solved in that containing an elastic sleeve, for example, rubber or silicone, having, alternating between each other, along the perimeter, two longitudinal perforated sections and two longitudinal non-perforated sections, as well as end non-perforated sections between which perforated sections are located, characterized in that Opposite longitudinal non-perforated sections of the elastic sleeve are partially interconnected to form a two-layer horizontal strip with a longitudinal axis symmetry, which coincides with the longitudinal axis of symmetry of the longitudinal non-perforated sections, and are compressed using fasteners between the longitudinal stiffeners with the formation on both sides of the two-layer horizontal strip of the sleeve of two identical parallel tubular perforated elastic membranes with horizontally arranged parallel axes.

The technical result is achieved in increasing the efficiency of aeration of the liquid due to fine aeration with air bubbles of the liquid, the possibility of self-cleaning of the aerator from clogging and reducing the biofouling of its elements. In this case, the cavity of the circular cross section of the sleeve is divided into two cavities of membranes of circular cross section, which allows for the dispersion of air from the aerator to obtain two parallel longitudinal maximums of air flow simultaneously from two tubular perforated aerator membranes, which allows to improve the aeration of the liquid with air, due to the expansion of the finely dispersed zone aeration on both sides of each of the longitudinal maximums of aeration (instead of one longitudinal maximum).

One of the elements of longitudinal stiffness can be a wooden beam, a metal or plastic profile.

The technical result is achieved by simplifying the design of the aerator and its attachment points when mounted in an aeration tank, eliminating the deflection of the perforated portion of the membrane, increasing the longitudinal span L between the supports. Elements of longitudinal stiffness are necessary to eliminate the deflection of the membrane between the supports and increase the span between the supports. For reference, when the membrane bends upward, an uneven dispersion of air bubbles is formed or, in general, the cessation of its expiration at the end sections of the membrane.

Between the horizontal stripes of the sleeve, an element of longitudinal stiffness is installed in the form of a wooden longitudinal beam, which is clamped together with the sleeve by external elements of longitudinal stiffness, for example, profile elements.

Effect: improvement allows you to vary the height of the longitudinal beams of the inner volume of the sleeve cavity under two perforated membranes and increase the longitudinal span L between the supports of the aerator.

The device is shown in the drawings.

FIG. 1. Aerator. Side view.

FIG. 2. Aerator. Top view A in FIG. one.

FIG. 3. Aerator. Section B-B in FIG. 2. Execution 1.

FIG. 4. Aerator. Section B-B in FIG. 2. Execution 2.

Figure 5 Aerator. Section B-B in FIG. 2. Execution 3.

The list of symbols in the drawings.

1. The sleeve.

2. Perforated longitudinal section.

3. Unperforated longitudinal section.

4. The end non-perforated area.

5. The horizontal strip.

6. The longitudinal axis of symmetry.

7. The element of longitudinal stiffness.

8. The membrane.

9. Fastener.

10. Profile.

11. Support.

12. The hairpin.

13. The beam.

L is the longitudinal span between the supports.

The aerator contains an elastic sleeve 1, for example, rubber or silicone, having, alternating between each other, along the perimeter, two longitudinal perforated sections 2 and two longitudinal non-perforated sections 3, as well as end non-perforated sections 4, between which perforated sections 2 are located.

Oppositely located longitudinal non-perforated sections 3 in the sleeve are partially interconnected to form a two-layer horizontal strip 5 with a longitudinal axis of symmetry 6, coinciding with the longitudinal symmetry axes of the longitudinal non-perforated sections 3, and compressed using fasteners between the longitudinal stiffening elements 7 to form on both sides from a two-layer horizontal strip of the sleeve of two identical parallel tubular perforated elastic membranes 8 with horizontally arranged pairs axle axles.

The end non-perforated sections 4 of the sleeve 1 are not perforated and are intended for connection with rigid bushings or nozzles for supplying compressed air to the sleeve.

Non-perforated longitudinal sections 3 of the sleeve 1 are interconnected by inner sides to form in the middle part of the sleeve 1 on both sides of the interconnected non-perforated longitudinal sections 3, two longitudinal tubular perforated elastic membranes 8.

In the manufacture of the aerator, the non-perforated longitudinal sections 3 of the sleeve 1 folded together are clamped between two longitudinal removable stiffeners 7, for example, bent trapezoidal profiles, which are oriented sideways upwards, which are fastened to the bag together with the membrane 8 using fasteners 9.

Elements 7 of longitudinal stiffness can be wooden beams, metal or plastic profiles 10.

Supports 11 can be made in the form of single or double studs 12 with threaded ends and a jumper between them, to which the aerator is attached.

The holes for fasteners in the two-layer horizontal strips 5 of the sleeve 1 can be made with a notch and framed with eyelets, which speeds up the installation and installation accuracy of the aerator.

Between the horizontal strips 5 of the sleeve 1, an additional element of longitudinal stiffness 7 is installed in the form of a wooden longitudinal beam, which is clamped together with the sleeve by external elements of longitudinal stiffness, for example, profile elements. The improvement allows you to vary the height of the longitudinal beam 13, the internal volume of the cavity of the sleeve 1 under the two perforated membranes 8 and to increase the longitudinal span L between the supports 11 of the aerator.

The device operates as follows.

The aerator operates in a submerged aerotank.

Compressed air is supplied from one end section of the sleeve 1 or from two end sections 4 to the sleeve 1, which is divided into two streams in the aerator and dispersed simultaneously from two tubular perforated elastic membranes 8 with horizontally parallel axes. The cavity of circular cross section of the sleeve is divided into two cavities of membranes 8 of circular cross section, which allows for dispersion of air from the aerator to obtain two parallel longitudinal maxima of air flow simultaneously from two tubular perforated membranes 8 of the aerator, which allows to improve aeration of the liquid with air due to the expansion of fine aeration zones on either side of each of the longitudinal maximums of aeration (instead of one longitudinal maximum).

In addition, the drainage of liquid from the aerator is improved, since the perforations are located almost over the entire perimeter of the cross section of each of the two tubular perforated elastic membranes 8 and the liquid is squeezed out by air into two flows from the lower zone of each of the tubular perforated membranes 8 of the aerator.

Claims (3)

1. An aerator containing an elastic sleeve, for example, rubber or silicone, having alternating between each other two longitudinal perforated sections and two longitudinal non-perforated sections, as well as end non-perforated sections, between which perforated sections are located, characterized in that the opposite longitudinal non-perforated sections sections of the elastic sleeve are partially interconnected with the formation of a two-layer horizontal strip with a longitudinal axis of symmetry coinciding with along the axis of symmetry of the longitudinal non-perforated sections, and compressed by means of fasteners between the longitudinal stiffeners with the formation on both sides of the two-layer horizontal strip of the sleeve of two identical parallel tubular perforated elastic membranes with horizontally arranged parallel axes. 2. The aerator according to claim 1, characterized in that at least one of the elements of longitudinal stiffness can be a metal or plastic profile. 3. The aerator according to claim 1, characterized in that between the horizontal stripes of the sleeve there is an element of longitudinal stiffness in the form of a beam.

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