RU2233804C2 - Device for aeration of liquid - Google Patents

Abstract

FIELD: saturation of waste water air with oxygen; biological purification plants; bio-reactors.

SUBSTANCE: proposed device includes central riser and upper part terminating in funnel, tubular case, horizontal blank, branch pipe with flange for delivery of liquid to be treated, mini-reservoir, air pipes, flow swirler, mixing chamber made in form of volute with port, reagent supply pipes and additional semi-branch with larger radius.

EFFECT: intensification of process; smooth distribution of reagents.

2 dwg

Description

The invention relates to techniques for oxygen saturation of wastewater and water close to them in water composition and can be used in treatment facilities for biological treatment of small settlements, in preliminary aeration chambers of bioreactor filters, in reactor chambers for the oxidation of divalent iron by atmospheric oxygen during the purification of natural water .

In practice, to create optimal cleaning processes - physical, chemical, biological, the following factors play an important role:

- maintaining stable, easily tunable operating temperature parameters of the processed liquid media;

- the creation of active reactions in liquid media (pH values);

- the introduction of various chemical reagents (substances) that have certain effects on the vital activity of microorganisms and bacteria, i.e. management of positive and negative chemotaxis processes;

- the establishment of certain interactions (relationships) with microorganisms: antagonistic, symbiotic or neutral.

Technically, management or the creation of optimal technological processes is possible provided that the reagents, steam, etc., are introduced into the volume of the processed medium in strict proportions (concentrations). Strict proportions suggest a high degree of distribution of input substances into the processed medium, which is a complex and costly engineering task.

A device for aeration of liquid [1] is known, consisting of a central riser, in the upper part of which a funnel is installed, an outer pipe case installed in the base on a horizontal plug, while the central riser and the pipe case together form a pressure cavity, bounded below by a horizontal plug, through which the central riser passes, the pressure cavity has a free spout in a mini-tank installed in the upper part of the device and mounted on the pipe case along its upper edge, air pipes placed in the pressure cavity, the lower ends of which are inserted into the cavity of the central riser by means of half-bends installed by their cuts in the direction of fluid flow.

However, this prototype does not have the ability to mix the necessary substances added to the liquid to be cleaned and the quality distribution of these substances inside the liquid to be treated, thereby controlling technological processes - physical, chemical, biological.

The technical problem solved by this invention is the intensification of the qualitative and quantitative characteristics of the device, providing the possibility of mixing and uniform distribution of reagents introduced for the technological processes of cleaning.

The stated technical problem is solved in that the device for aeration of liquid consists of a central riser with a pipe case located around it, which together form a pressure cavity, bounded below by a horizontal plug, while the central riser passes through a horizontal plug and ends in a funnel in the upper part, and a pipe the case rests on it, while in the upper part, expanding, it forms a mini-tank of air pipes placed vertically in the pressure cavity, the lower ends of which are the inlet it is at different horizons inside the central riser by means of half-bends, and the upper ends of the air pipes are led above the liquid level in the mini-tank, the flow swirl, an additional half-bend and a mixing chamber made in the form of a snail located on the bottom of the horizontal plug and formed by vertical planes into which reagent feed pipes are inserted, with the upper and lower horizontal planes and the end plane on which a pipe with a flange for feeding is installed along the horizontal axis liquid, inside the mixing chamber a window is made through which the liquid to be processed tangentially enters the pressure cavity, the flow swirl is formed by a set of vertical plates arranged at an angle to the axis of the device, assembled in a separator ring and located in the upper zone of the device at the junction of the cutoff of the pipe case and a mini-tank, and an additional semi-tap has a large radius and is installed at the outlet of the device.

This device design has higher performance in relation to the prototype. It most fully uses the forces of gravity, and additional changes in the design of the device are minimal and do not carry large material costs. When using them, there is a sharp saving in the input substances.

Figure 1 shows the design of a device for aeration of a liquid; figure 2 - mixing chamber.

The device consists of a central riser 1, in the upper part of which a funnel 2 is installed, the lower part of the central riser 1 terminates in a large radius semi-outlet 11, an outer pipe case 3 mounted on a horizontal plug 4, while the central riser 1 and the pipe case 3 together form a pressure cavity . The mini-tank consists of an expanding cone 5 mounted on the upper edge of the tube case 3. An annular element 6 is installed along the outer edge of the expanding cone 5. The jointly expanding cone 5 and the annular element 6 form a mini-tank. A pipe with a flange 7 is installed on the frontal vertical plane of the mixing chamber 13, which is a snail formed by vertical planes, upper and lower horizontal planes. The horizontal plug 4 is partially the lower plane of the mixing chamber. Inside the mixing chamber, a vertical window 12 is made through which the liquid to be treated enters the pressure chamber of the device. The air pipes 8 are vertically placed in the pressure cavity of the device, and their lower ends are inserted into the cavity of the central riser 1 at different horizons by means of half-bends 9 and are installed with their cuts in the direction of fluid flow, and their upper ends are led out above the annular element 6.

In the upper part of the device, in the area where the cut-off of the tube case 3 and the small circle of the expanding cone 5 form the bottom of the mini-tank, vertically, with an angle of inclination like a separator ring, steel plates 10 of the fluid flow swirl are installed between the central riser 1 and the tube case 3 . At the top of the device ends with an umbrella.

A device for aeration of a liquid works as follows. The liquid subjected to aeration, under excess pressure, enters through a pipe with a flange 7 into the mixing chamber 13, where the reagents are fed. Through a vertical window 12 from the mixing chamber 13, the initial fluid, twisting, enters the pressure cavity formed by the outer surface of the central riser 1 and the inner surface of the tube case 3. From the pressure cavity, the liquid enters the mini-reservoir formed jointly by the expanding cone 5 and the annular element 6 while passing through the plate swirl flow 10, installed as a separator ring. The stream with an ordered movement is “screwed” along the generatrix of the expanding cone 5 and the annular element 6 and poured into the funnel 2. Further, the liquid, when moving from top to bottom in the central riser 1 at various horizons, flows around the half-bends 9 of the air pipes 8 and is additionally actively aerated by air ejection inside the riser, while completely freezing the flow during operation is completely eliminated, which leads to a significant increase in device performance.

The system comes into dynamic equilibrium when the liquid removed from the mini-tank through the funnel 2 and the central riser 1 is balanced by the liquid entering the mini-tank. At the exit of the central riser 1, a large radius semi-outlet 11 is installed, which, when the device is operating, forms a layering jet of the processed liquid distributed within the volume of the processed liquid.

Using static (excess) pressure chambers when several similar devices of the same type are connected to the pump, the hydraulic system is completely connected. A liquid aeration device equipped with a mixing chamber, flow swirl plates, large radius semi-tap is extremely simple. There are no moving mechanical parts in it, it is low-energy due to the fact that the mechanical energy of the pump is used to create the working conditions of the device, because The main required aeration work is carried out by gravity.

The use of thermal insulation on the pipe case and on the outer surface of the mini-tank and the presence of a small diameter drainage hole in the horizontal plug from the pressure cavity allows the device to be used for aeration of liquid in central Russia.

All these factors ensure the achievement of the above technical task.

Sources of information

1. Patent No. 2181343 “Device for aeration of a liquid”, IPC C 02 F 3/20, authors Shelkovsky V.K. and etc.

2. Yakovlev S.V. and other wastewater treatment. - M.: Stroyizdat, 1979.

3. Water supply and sanitary equipment, No 7 for 1998, p. 26, article "Re-equipment of the biological wastewater treatment plant", G. Zhdanov

Claims (1)

A device for aeration of liquid, consisting of a central riser with a pipe case located around it, which together form a pressure cavity, bounded below by a horizontal plug, while the central riser passes through a horizontal plug and ends in a funnel in the upper part, and the pipe case rests on it, this in the upper part, expanding, forms a mini-tank, a pipe with a flange, air pipes placed vertically in the pressure cavity, the lower ends of which are at different horizons inside ry of the central riser by means of half-bends, and the upper ends of the air pipes are led above the liquid level in the mini-tank, characterized in that it is equipped with a flow swirl, an additional half-bend and a mixing chamber made in the form of a cochlea located below on a horizontal plug in the vertical plane of which reagent supply pipes are cut in, and in the end plane along the horizontal axis there is a pipe with a flange for supplying the processed fluid, a window is made inside the mixing chamber through which the fluid being processed tangentially enters the pressure chamber, the flow swirl is formed by a set of vertical plates arranged at an angle to the axis of the device, assembled in a separator ring and located in the upper zone of the device at the junction of the cutoff of the pipe case and the mini-tank, and the additional semi-tap has a large radius and installed at the exit of the device.

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