SU944519A1 - Apparatus for aeration of water in fish cultural water basins - Google Patents

Description

The invention relates to a fish farm, namely, devices for aerating water in fish ponds, and can be used to enrich water in fish drainage facilities.

A device for aerating water is known that contains a pipe, inside which a smaller diameter pipe is located coaxially, in the upper part of which a device for air supply is mounted, and a ring grille is rigidly fixed on the bottom, while the device for air supply includes an electric motor, a shaft and shaft axle impeller, and at the lower end of the VA-. Under the grille, an additional axial impeller is also mounted, which forces air into the annular channel between the pipes C. 11.

The disadvantage of the device is that when operating in fish; ore additional axial gear:

A forest injures a fish that is sucked into the device with water. In addition, small air bubbles emanating from the orifice of the annular lattice, moving in space between the pipes, merge into large air bubbles, which reduces the degree of water saturation with air oxygen.

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10, by its technical essence and effect achieved, is a device for aerating water, including a pipeline for supplying air, a body formed by a vertically installed 5 shell and two tube sheets - the upper and lower ones, and vertical tubes located in the body, the upper ends of which are rigidly connected to corresponding tube sieve 2.

However, in this device the time of contact of air with water is insignificant, since at the output end of each 3g tS

The tube is installed with the formation of an annular gap in the nozzle and water, the passage through this annular target is in contact with the air only in the nozzle. In addition, air, j outflow from a series of tubes, can, when it enters the water, drain into large bubbles, which reduces the efficiency of aeration.

The aim of the invention is to prevent rotation of the formation of large air bubbles, an increase in the time of contact of air with water and thereby an increase in the saturation of water with oxygen of air.f5

To achieve the goal in the device, which includes a pipeline for supplying air, a housing formed by a vertically installed shell and two tube sheets - the upper and lower ones, 20 and vertical tubes located in the housing, the upper ends of which are rigidly connected to the corresponding tube grid. air supply is placed along the central axis 25 of the housing and mounted into the lower tube sheet for supplying air under the ke, and the lower ends of the vertical tubes are passed through the appropriate tube sheet and have walls „

air holes

FIG. 1 shows the proposed device, a general view of FIG. 2 section A-A in FIG. one.

The device includes a housing; Called a cylindrical shell, tube 1 and two tube sheets 2 and 3, located along the central axis of the casing, pipeline k for supplying air, built into the lower grid 2, and vertical tubes 5, the upper ends of which are rigidly connected to the tube sheet 2, and the lower ones through the tube sheet 3 and have in the side walls of the hole 6 for the passage of air. In the upper part of the pipeline C, a device for supplying air into it is mounted, which includes an electric motor 7, on shaft 8 of which an axial impeller 9 is rigidly SO mounted. The upper part of the pipeline is extended and has 10 l air passageways.

The device can be installed on a pontoon, a catamaran or a non-reservoir. In the latter case, it is packed with supports 11, which are gesture194

They are attached to the bottom of the pipe 1. The height of the supports 11 should be sufficient to allow enough water to flow to the lower ends of the pipes 5.

The lower ends of the tubes 5 are arranged so that the distance from the lower lattice band 3 to their lower ends is 5-6 d, where d is the inner diameter of the tubes 5. The diameter of the holes 6 is determined experimentally.

The device is located in the water so that the air intake windows 10 are at a certain height above the water level determined by the height of the waves in the pond.

The device works as follows.

During operation of the electric motor 7, the axial impeller 9 sucks air from the atmosphere through the windows 10 and pumps it through the pipe k under the grill 3. Under the pressure of the incoming air under the grill 3, an air cavity 12 is formed, from which air flows through the holes 6 into the tubes 5. Air coming into the tube 5, it emerges in them in the form of separate bubbles, under the influence of which in the tubes 5 there is a movement of water directed upwards. Water enters the tube 5 through their lower open ends, and out through the upper. During the movement of the air-water mixture in the tubes 5, a process of mass exchange occurs, as a result of which a part of the oxygen from the air bubbles passes into the water, i.e. the water is saturated with oxygen, which is necessary for respiration of fish living in the reservoir.

In addition, the orderly movement of the air-water mixture in the individual tubes 5 prevents the small bubbles from merging into larger ones. For this reason, the degree of oxygen saturation of the air is higher than in the known device, which increases the efficiency of aeration. I

Claims (2)

The use of tubes 5, fixed in gratings 2 and 3 and having air holes 6 at their lower ends, makes it possible to create a device for aeration of water in fish ponds, in which there are no zones in which fish can be etched. The proposed device can be equally effective in both rivers and fish ponds, where there is no flow of water. . . The use of the invention in industry will provide an economic effect of about 2.8 thousand rubles. in year. The invention A device for aerating water in fish ponds, including a pipeline for air, a body formed by a vertically mounted shell and two tube screens - the top and bottom, and vertical pipes arranged in the body in the body of the eepi-clap. i Ki, the upper ends of which are rigidly St. 9 V7 LL / 9 are fitted with an appropriate tube sheet, which is to prevent large air bubbles from forming, to increase the time of air contact with water and thereby increase water saturation with oxygen of air, the air supply line is located along the central axis of the housing. and mounted into the lower tube sheet for air supply under it, and the lower ends of the tubes are passed through the appropriate tube sheet and have air holes in the walls. Sources of information taken into account in the examination of 1, USSR Copyright Certificate No. 567676, cl. O 02 6 1/10, 1975. 2. German patent If 121, i | 82, cl. kS h 63/00, 1898.