HU180647B - Apparatus for getting in foreign gas and/or fluid into receiving fluid and intensive contacting with same - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to an apparatus for transferring foreign gas and / or liquid into a receiving liquid and for intense contact with the receiving liquid.

In the field of water purification, various devices are widely used for introducing foreign gas (primarily oxygen in the air) into the water by removing iron and manganese, de-acidifying, degassing, etc. for the purpose. The main consideration when designing equipment is to dissolve as much oxygen as possible in the air introduced into the water. This requires, on the one hand, that the surface of the air bubbles that are introduced is as large as possible and, on the other hand, that the bubbles are perfectly mixed with the water.

One of the known ways of supplying air is the so-called horizontal or vertical axis. use of aeration rotors. These rotors intensively agitate the surface of the water and thus contact the air over a relatively large surface area, which dissolves into the water in a significantly increased amount relative to normal.

It is also known to introduce air by pressure, in the form of bubbles, such as a fan, air pump, compressor, etc. help.

There are also known so-called. air intake devices with a rotary shaft made of a tube. In this tube shaft, due to the high revolution of the structure, a vacuum is created 180647, which draws in air and passes it through the tube into the water.

Combinations of the above solutions are also known. The air inlet devices also mix the water to make the air in contact with the water as large as possible and to prevent the solids from settling there. Known devices are generally well-established in practice, but have a relatively high specific energy requirement. Equipment would need to be able to inject the same amount of oxygen into the water using less energy than at present, while still providing intensive mixing.

When treating wastewater by biochemical treatment, the so-called. sludge recirculation is also required. In fact, from the activated sludge basin, the sewage sludge mixture flows by gravity to a road sedimenter, where the sludge has to be separated from the already purified sewage. Providing the right upstream flow rate at the bottom of the settler, the sewage sludge settles and the purified sewage can be removed from the settler through a trough. The sedimented sewage sludge from the wastewater treatment plant must be returned to the activated sludge basin (recycled). The sludge recirculation rate is generally close to 100%, but may be as high as several times daily.

The sludge recirculation is essentially the delivery of foreign liquid 1180647 into the receiving fluid, which is usually done by mechanical means (e.g., sludge lifting wheel, worm pump, submersible pump, etc.).

It is known to provide a state-of-the-art solution in which a vertical axis surface aeration rotor or a special design of the biological unit provided automatic recirculation. This solution utilized the high suction power of the aeration rotor.

The major disadvantage of the known recirculation solutions is also the high energy demand.

It is an object of the present invention to overcome this deficiency.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus which is capable of simultaneously conveying foreign gas and foreign liquid to a receiving liquid, or intense contact, homogenization, and intense turbulent flow of the mixture with the receiving liquid.

SUMMARY OF THE INVENTION The object is to provide a device for introducing foreign gas and / or liquid into and receiving intimate contact with a receiving liquid having a rotor and an associated motor interacting with the receiving liquid in operation, and wherein the rotor according to the invention is horizontal preferably an impeller having a vertical axis, having an upper and lower blade rows, the upper and lower blade rows separated by a liquid and gas barrier bulkhead, and an axial inlet and a radial outlet, and a radial outlet, has a radial outlet.

In a preferred embodiment of the device according to the invention, the radial outlet of the upper blade row is formed as a nebulizer.

In another preferred embodiment, the radial inlet of the lower blade row is formed by a space between the radial blades. In a further preferred embodiment, the gas intake pipe connected to the axial inlet of the upper blade row is coaxial with the impeller.

It is also advantageous if the impeller is mounted directly and / or indirectly on the rnotpr shaft.

Finally, it is advantageous if the device is mounted on a vertical guide post and / or support structure.

The apparatus of the present invention is simultaneously capable of delivering both gas and liquid to the receiving liquid, mixing it homogeneously, and vigorously turbulent flow of the mixture. Its energy consumption is therefore relatively low. Its structure, simple operation, automation of its operation, does not require any management staff, only supervision, its implementation cost is very small compared to known equipment for similar purposes, its weight is low, therefore only. it minimizes the load on the supporting structure and can be easily removed when necessary. from the receiving fluid for maintenance or installation. It is also well-suited for applications where the fluid level varies greatly, requiring no floating structure, which increases investment costs for conventional equipment and also prevents intense turbulent flow.

If necessary, it can also be used to inject gas or liquid only, by closing the suction pipe connected to the appropriate inlet.

The invention will now be described by way of example only with reference to the accompanying drawings.

In the drawings, Fig. 1 is a side view (in sectional view) of the exemplary apparatus; Fig. 2 is a top view (partially sectioned) of the impeller of the apparatus of Fig. 1;

Figure 3 is a bottom view (partially sectioned) of the impeller of Figure 2;

Figure 4 is a side view (partially sectioned) of the impeller of Figures 2 and 3;

and FIG. Figs.

The exemplary apparatus has a support structure 8 which is mounted on a guide post 10 mounted on a bottom 9 of a water purification basin (not shown in detail). The support structure 8 is equipped with a fluid motor 7, known per se, having a shaft 12 facing upwards. The motor 7 has a flange 13 for attaching a flap to a concentric circular opening 15 formed on the underside of the cylindrical impeller housing 14. Downwardly from the opening 15 a tubular protective jacket 16 extends which surrounds the motor 7. A concentric circular inlet 17 is also provided on the upper side of the impeller housing 14 to which a vertical gas suction pipe 4 is connected. In this example, the gas suction tube 4 may be a vertical, straight, open tube extending above the level of the water in the basin, or otherwise a tube connected to a gas container.

A liquid suction tube 6 is connected eccentrically to the underside of the impeller housing 14, the connection portion of which is vertical, but is otherwise guided to a settling basin (optionally not shown), from which sludge is recirculated to the basin depicted.

A lifting hook 11 is formed on the upper side of the impeller housing 14, whereby the whole device mounted on the support structure 8 a. 10 guide columns, raised above the liquid level for assembly, cleaning, etc. for the purpose,

In the impeller housing 14 there is provided an impeller 1, which is directly the 7th engine. It has twelve axial stumps. Refer to Figures 2-5 for details of impeller 1. illustrations illustrate

The impeller 1 has a liquid impeller and a gas impeller disc-shaped partition 18 separated by an upper blade row 2 and a lower blade row 5. The elements of the upper blade row 2 are radially bent backwardly curved blades with respect to the direction of rotation A, extending from the center of the impeller 1 to its periphery. The perimeter of the impeller 1 is closed between the outer ends of the upper blade members 2 only at the location of the blade 2 members with the circumference of the impeller 1, from this point the atomizers 3 provided with an opening B are arranged slightly forward form. The elements of the upper blade row 2 are joined from above by a disc-shaped closing plate 20.

The lower blade members 5 are also curved blades with respect to the direction of rotation, but they extend from the circumference of the impeller 1 only about 1/4 of the radius of the impeller 1. The elements of the lower blade row 5 are joined together by an annular sealing plate 19 from below. The liquid suction tube 6 is introduced from below at a distance less than the inner radius of the sealing plate 19 from the shaft end 12. Between the elements of the lower blade row 5 there are radial inlets 21.

The equipment shown operates as follows:

The upper blade row 2 of the impeller 1 rotated by the motor 7 through the inlet 17 and the gas suction pipe 4 draws air from the atmosphere above the water surface into the liquid (water) delimited by the elements of the baffle 18, sealing plate 20 and upper blade row. It comes.

At the same time, the lower blade row 5 draws sludge from the sedimentation tank (not shown) through the liquid suction pipe 6. The sludge enters the blades through the radial inlets 21 and discharges along the circumference.

The impeller 1, which rotates at the same speed as the motor 7, intensively agitates the receiving fluid, contacting the supply air over a large surface area, thereby providing increased oxygen uptake, while also well homogenizing the mixture with the recirculated sludge.

Claims (6)

Patent claims An apparatus for feeding and intense contact of a foreign gas and / or liquid with a receiving fluid, the apparatus having an rotor and an associated motor interacting with the receiving liquid in operation, characterized in that the rotor is non-horizontal 5 - preferably vertical - impellers (1) having an upper vane row (2) and a lower vane row (5), the upper and lower vane rows (2, 5) being separated by a liquid and gas barrier partition (18) for the upper vane row (2) having an axial inlet (17) connected to a gas suction pipe (4) and a radial outlet, and a radial outlet (21) connected to the lower blade flaps (5) connected to a liquid suction pipe (6). Embodiment according to claim 1, characterized in that the radial outlet of the upper blade row (2) is designed as a nebulizer (3). Embodiment according to claim 1 or 2, characterized in that the radial inlet (21) and the radial outlet of the lower blade row (5) are formed by a space between the radial blades. 4. Device according to any one of claims 1 to 3, characterized in that the upper blade row (2) has an axial inlet (17). 30 connected gas suction pipes (4) coaxial with the impeller (1). 5. An embodiment of the apparatus according to any one of claims 1 to 5, characterized in that a 35 impellers (1) are mounted directly and / or indirectly on the shaft of the motor (7). 6. An apparatus according to any one of claims 1 to 5, characterized in that It is mounted on 40 vertical guide posts (10) and / or support structures (8).