SU1452599A1 - Aeration device - Google Patents

Abstract

The invention relates to a device for saturating liquids with gases and b. used in the enrichment of minerals, oxygenation of activated sludge, biological treatment of wastewater, aeration of water bodies, carrying out physical and chemical processes. The purpose of the invention is to increase the reliability of work, improve the aero-hydrodynamic conditions of heat and mass transfer and prevent liquid from entering the interior of the pneumatic aero-heaters of air and air flow, air and air (A). A 1 consists of concentrically mounted and rigidly interconnected conical perforated rigid lower and upper elements 5. Between the elements 5 concentric is the perforated elastic bulkhead 8, and above it is the turf membrane (M) 7. The perforation of the bulkhead 8 is annular tops and bottoms. Holes in M 7 m. B. made at an angle to the axis of the aeration pipe 2p (180 ° C) / 2, where a is the angle at the apex of the elements 5. At that, the pipe 2 is installed opposite the apex of A 1. The gas is supplied under pressure into A 1, deflects bulkhead 8 and its perforation enters under M 7. Through the holes in M 7, gas in the form of bubbles is released into the liquid. The fluid flow is accelerated in pipe 2 and mixed with the bubbles. When stopping the gas supply, the bulkhead 8 takes the original shape and prevents the access of gas to the M 7 and the access of the liquid inside A. 1. Cp f-ly, 2 ill. (L N SP to 01 WITH CO

Description

I The invention relates to a device for saturating liquids with gases and intensifying heat and mass transfer between them and can be used, for example, for: -) mineral mineralization by the method of foam flotation, during oxygenation of activated sludge, during biological treatment 4 flow of wastewater, when conducting various physical and chemical processes associated with the treatment of liquids with gases (about bubbles, which, after being released, rise up through the openings of the upper rigid perforated element 5. Fluid flow through the aeration pipe 2, is accelerated due to the gradual reduction of the cross section of the aeration pipe 2 and at the exit from it is mixed with air bubbles, coming together with the partially aerated liquid from the openings of the upper hard perforated diffusion, chemisorption, dissolution), 10th element 5 As in the process of operation, the aeration of reservoirs.

The purpose of the invention is to increase reliability, improve aero-hydrodynamic conditions of heat and mass transfer and elimination, and in case of cessation of compressed air supply to pneumatic aerator 1, elastic bulkhead 8 - shut-off valve, completely removes chances, and in case of cessation of compressed air supply to pneumatic aerator 1, elastic bulkhead 8 - shut-off valve, completely eliminates the likelihood of liquid getting inside the pneumatic device;

tical aerator. In addition (in Fig. 2 is not shown

FIG. 1 shows the aeration mouth-elastic bulkhead 8), fabrication of derR | 0stvo, general view; in fig. 2 - part of the rheumatic aerator when supplying air | a, section.

I The aeration device includes a pneumatic-20 Critical aerator 1 and an aeration pipe 2, which are installed at the bottom of the chamber | s 3, and an air duct 4.

: Pneumatic aerator 1 is made in the fault membrane with holes forming

angle of aeration tube

180 °

-but

where a is the angle at the apex of conical aerators, it eliminates the direct clogging of pores with particles comparable to the size of pores. Nuclear membranes — one of a variety of two concentrically mounted and stiffened porous filter filters — are produced by knitting the “Pnvo ..” about irradiating accelerated polymer films of interconnected upper and lower perforated elements, in the form of cones 5 with a hole 6 (Fig. 2), between which the turf membrane 7 is located with an effective pore diameter of 3-10 microns, which allows working with an excess pressure not higher than 0.5 atm. The interfacial membrane and the lower rigid perforated element 5 are positioned with a static bulkhead 8, blocking in the presence of air pressure the perforation of the lower rigid element 5, which has round holes at the edges for release into air. Elastic bulkhead 8 completed | It has the role of a shut-off valve for a fluid, preventing it from getting inside the amp &

heavy ions and subsequent chemical etching. The peculiarity of these materials is the cylindrical shape of the pores and their small dispersion in size. Depending on practical requirements, a turf membrane with any specified average pore diameter, starting from 0.01 µm, can be specially manufactured.

Claims (2)

1. An aeration device comprising an aeration pipe and a pneumatic aerator in the form of rigidly connected top-shaped conical perforated bottom pipes concentrically mounted to the aeration pipe  rigid perforated element 40 rigid element and elastic bulkhead, characterized in that, in order to increase the reliability of its operation, to improve the aero-hydrodynamic conditions of heat and mass transfer and to eliminate the ingress of fluid into the 5 of the pneumatic aerator, it is equipped with a perforated elastic partition mounted one above the other by a nuclear membrane and an additional rigid perforated element, with openings in the elastic perforated pement and serves as a limiter for the nuclear membrane 7, limiting its deformation. The aeration device works as follows. Compressed air is supplied to the pneumatic aerator 1 from the duct 4 under some overpressure, causing the elastic bulkhead 8 to deflect, which opens the air through the openings of the lower perforated element 5; 50 The bulkhead is made annular and located at the top and bottom edge, elastic bulkhead 8 at the top and back 2. The device according to p., Characterized in new to the nuclear membrane 7, deformed under the action of air pressure, while through the holes in the nuclear that the holes in the nuclear membrane are inclined to the axis of the aeration tube by an angle of p (180 °) / 2, where a is the angle at the membrane air is released into the liquid at the 55 apex of the conical elements. in the form of bubbles, which, after being released, rise up through the holes of the upper rigid perforated element 5. The fluid flow through the aeration pipe 2 is accelerated due to the gradual reduction of the cross section of the aeration pipe 2 and at the exit from it is mixed with air bubbles. with partially aerated liquid from the openings of the upper rigid perforated element 5. As in the process of operation of the device, and in the case of cessation of the supply of compressed air to the pneumatic aerator 1, elastic Eborka 8 - shut-off valve, completely removes the possibility of liquid getting inside the air-jet elastic bulkhead 8), the manufacture of a nuclear membrane with openings forming angle of aeration tube 180 ° -but heavy ions and subsequent chemical etching. The peculiarity of these materials is the cylindrical shape of the pores and their small size dispersion. Depending on practical requirements, a turf membrane with any specified average pore diameter, starting from 0.01 µm, can be specially manufactured. Invention Formula 1. An aeration device comprising an aeration pipe and a pneumatic aerator in the form of rigidly connected top-shaped conical perforated bottom pipes concentrically mounted to the aeration pipe rigid element and elastic bulkheads, that the holes in the nuclear membrane are inclined to the axis of the aeration tube by an angle of p (180 °) / 2, where a is the angle at the top of the conical elements. | ° | ° 17 ° FIG. 2