LV15674B - Device for lifting and aeration of liquid - Google Patents

Abstract

The invention relates to the fishing industry, especially to equipment for saturating water with oxygen in a fish breeding pool. The device consists of a water reservoir with an inclined, flat partition and an aerator, and a separate reservoir with a higher water level. Both reservoirs share a dividing wall.

Description

DESCRIPTION OF THE INVENTION

Technical sector

[001] The invention is a liquid lifting and aeration device that can be used to circulate liquid in recirculating water supply systems (RAS).

Analysis of the prior art

[002] A liquid lifting and aeration device (LV 14827 B) is known, which comprises an aerator, a water collector and a vertically arranged hollow body of a water lift structure having quadrangular walls inclined to the base, which form a quadrangular truncated pyramid, which is closed by a quadrangular cross-section tube .

[003] The disadvantage of this structure is the complexity of its manufacture and high price, with the reservoir in which the liquid is pumped, the connection channel equipment and the need for the water collector, the need to strengthen the structure with the water collector structure due to the force of the large liquid upflow on the surface of the water structure, the pumped liquid the absence of the possibility of adjusting the take-off height and volume.

Outline of the invention

[004] The proposed invention solves the problem of rising of a large amount of liquid from a reservoir to a reservoir with a higher liquid level, improves circulation by increasing the air lift effect, provides the possibility of adjusting the height and volume of the pumped liquid, provides a simple and rational placement of the liquid lifting equipment. For this purpose, in a tank with a vertical front wall, which at the same time is a dividing wall between the tank from which the liquid is pumped and a tank with a higher level of liquid into which the liquid is pumped, a flat partition is placed against the bottom and the front walls. An inclined flat partition with a front wall forms a confusor in a cross-section perpendicular to their planes, and can change the angle of inclination and thus change the angle of conicity of the conicer, regulating the height and volume of the ascent of the pumped liquid in direct proportion. An aerator is placed at the bottom of the reservoir in the lower part of the mixer, which sprays air that rises up and takes the liquid with it, forming an updraft. The narrowing of the passage part of the equipment ensures an increase in the flow rate and its kinetic energy, which ensures the height of the liquid rise.

[005] The distinctive feature of the proposed invention is the placement of a flat partition inclined to the bottom in both existing and newly created reservoirs, using one of the walls of the reservoir. The device can be made up of several sequentially placed modules that form a lifting cascade.

brief description of the drawings

[006] The attached drawings show:

Fig. 1 Overview of liquid lifting and aeration equipment.

Fig. 2 Section A-A of the liquid lifting and aeration equipment with flat partitions inclined towards the bottom and the front wall of the reservoir.

Fig. 3 Liquid lifting and aeration plant with section plane A-A marked.

[007] The liquid lifting and aeration device is formed with a flat partition (1) inclined towards the bottom (5) and a reservoir (12) with a liquid level (10) and vertical side walls (6), (7) a front wall (2) . In the lower part near the bottom (5) between the inclined flat partition (1) and the front wall (2) of the reservoir (12), an aerator (3) is placed.

[008] To lift and pump the liquid from the reservoir (12) to the reservoir with a higher liquid level (13), the required amount of air is fed through the aerator system (3) to the lower expanded part of the mixer, which is formed by an inclined flat partition (1), the reservoir (12 ) front wall (2) and its side walls (6), (7). The air (8) leaving the aerator system (3) rises up and, thanks to the air lift effect, takes with it a large liquid mass (9) in the form of an updraft, which, accelerating in the confusor channel, rises above the edge of the front wall (2) and spills over it .

[009] By changing the inclination angle α of the flat partition (1) against the front wall (2), the conicity of the mixer and the speed of the liquid at the exit from the air lift change proportionally, but together with this, the height and volume of the ascent of the pumped liquid change. Such construction is simple and economical to implement. The use of the air lift effect reduces energy consumption and makes the equipment cheaper to implement and operate.

[010] As one of the methods of implementing the invention can be as follows:

[011] Water from a group of fish rearing pools, after a mechanical purification recirculating water supply system (RAS), enters a storage tank having a front wall 2.7 meters high, 2.4 meters wide, and perpendicular side walls where the water level is same as in fish breeding ponds, rises with a water elevator device at a height of 0.3 meters and flows over the front wall of the storage reservoir to the bioreactor of the water regeneration complex. The water lift device is made with a flat partition inclined towards the bottom of the pool, the lower edge of which is parallel to the bottom and the front wall of the storage tank and is located at a distance of 0.3 meters from the bottom of the storage tank and at a distance of 0.5 meters from the front wall of the storage tank, but the upper edge of an inclined flat partition - at a distance of 0.15 meters above the upper edge of the front wall, which is located at a distance of 0.2 meters from the plane of an inclined flat partition. Aerators are placed between the lower edge of the inclined flat partition and the front wall of the storage tank in the horizontal plane, which spray the air that rises up, entraining and accelerating the flow of water, which, due to inertia, rises above the water level in the storage tank to the upper edge of the front wall of the tank and spills over over it, thereby converting the kinetic energy of the water flow into potential (water level in the bioreactor) as a result of the air lift effect.

Claims (3)

1. A liquid lifting and aeration device comprising a flat partition wall (1) inclined to the bottom (5) arranged in a reservoir (12) or a channel with flat walls, which forms a confusor channel with the front wall of the reservoir (12) or channel (2), which in the lower part there is an aerator system (3), and in the upper part - an overflow over the edge of the front wall (2). 2. The device according to claim 1 differs in that, to increase the air lift effect, the inclination angle α of the inclined flat partition (1) against the front wall (2) varies depending on the height and volume of the pumped liquid. 3. The device according to claim 1 differs in that the reservoir (12) contains side walls (6, 7), which with an inclined flat partition (1) and the front wall (2) of the reservoir (12) form a confounder.