RU222784U1 - VORTEX AIRLIFT DEVICE - Google Patents

Abstract

The utility model relates to devices designed to saturate water with atmospheric oxygen, as well as to mix the aeration volume, and it can be used in technological processes for biological wastewater treatment. The vortex airlift device contains a vertical cylindrical pipe, on the perforated section of which there is an air mixing chamber, to which an air duct is connected. At the lower end of the vertical cylindrical pipe there is a device for swirling the fluid flow, made in the form of a single-thread screw. At the upper end of the pipe, an outer cylindrical pipe is installed coaxially, having a diameter 4 times larger than the diameter of the inner pipe. A branch pipe is tangentially connected to the outer cylindrical pipe for supplying liquid to the annular space formed by the outer and inner pipes. The annular space is hermetically sealed with an annular bottom. Technical result: increasing the peripheral speeds of the rotational-translational movement of the water-air mixture, ensuring intensive mass transfer processes and increasing the efficiency of the pneumatic aeration system. 2 ill.

Description

The utility model relates to devices designed to saturate a liquid with atmospheric oxygen, as well as to mix the aerated volume, and it can be used in technological processes for biological wastewater treatment.

A “device for aerating a liquid” is known, containing a vertical pipe, an air duct connected to an air chamber located on a perforated section of the pipe and a vortex chamber coaxially connected to the pipe, located below the pipe, the diameter of which is 3-5 times the diameter of the pipe, to the vortex chamber a pipe for supplying liquid is tangentially connected (patent for invention, registration number RU 2093470, application number 5005947/25, 07/08/1991. C02F 1/24 publ. 10/20/1997).

The main disadvantage of the known device is the low intensity of the liquid mixing process in the aeration volume and, as a result, the insufficient efficiency of the aeration system.

The purpose of the utility model is to create a device design that makes it possible to significantly intensify the process of mixing liquid in an aeration basin and increase the efficiency of a pneumatic aeration system.

The technical result of the utility model is the ability to maintain high values of circumferential velocities of the rotational-translational movement of the water-air mixture in the aeration basin, ensuring intensive mass transfer processes.

The technical result is achieved due to the fact that the vortex airlift device is made in the form of a vertical cylindrical pipe on the perforated section of which there is an air mixing chamber to which the air duct is connected. At the lower end of the vertical pipe there is an apparatus made in the form of a single-throw screw that twists the flow of liquid, and at its upper end there is an outer cylindrical pipe coaxially installed, having a diameter 4 times larger than the diameter of the inner pipe. A pipe for supplying liquid to the annular space formed by the outer and inner pipes is tangentially connected to the outer cylindrical pipe. The annular space is hermetically sealed with an annular bottom.

A useful model of a vortex airlift device is illustrated by the accompanying drawings: FIG. 1 - Cross section 2-2; Fig. 2 - longitudinal section 1-1.

The vortex airlift device contains a vertical cylindrical pipe 1, on which there is a section with through perforations 4, hermetically sealed with an air mixing chamber 3 to which an air duct 5 is attached. At the lower end of the pipe 1 there is a device for swirling liquid flow 2.

At the upper end of the pipe 1, an external cylindrical pipe 6 is installed coaxially with it, to which a pipe 7 is tangentially connected, intended for supplying liquid to the annular space formed by the vertical pipes 1 and 6. The annular space formed by the vertical pipes 1 and 6 is hermetically sealed with an annular bottom.

The device works as follows: through the air duct 5, compressed air is supplied to the air distribution chamber 3, from where it enters the pipe 1 through holes 4, as a result of which a water-air mixture is formed inside it, the density of which is significantly less than the density of water. Under the influence of a pressure difference, water from the aeration pool enters the lower end of pipe 1, passes through apparatus 2 and the liquid flow swirls. The flow of water swirled in this way rises to the level of holes 4 in pipe 1, through which air enters and cuts off the air bubbles formed in holes 1, which helps reduce their diameter. The flow of water-air mixture formed in the air-mixing chamber 3, which has a rotational-forward motion, exits from the upper end of the vertical pipe 1 and enters the vertical pipe 6, as a result of which the hydrostatic pressure inside it becomes less than the water pressure at the level of the pipe 7. Under the influence of the pressure difference, water from the aeration pool enters through a tangentially connected pipe 7 into pipe 6, where an upward flow of liquid is created, having a rotational-forward motion, rotating in the same direction as the flow of the water-air mixture leaving pipe 1. Rotating in one direction inside pipe 6, liquid flows and water-air mixture spin each other, as a result of which the process of water aeration is significantly intensified.

Claims (1)

A vortex airlift device containing a vertical cylindrical pipe, an air duct connected to an air mixing chamber located on a perforated section of the pipe, characterized in that at the lower end of the pipe there is a swirling liquid flow device made in the form of a single-thread screw, and at the upper end of the pipe coaxially with it an outer cylindrical pipe is installed, having a diameter 4 times larger than the diameter of the inner pipe, the annular space between the vertical pipes is hermetically sealed with an annular bottom, and a pipe for supplying liquid to the annular space is tangentially connected to the lower end of the outer pipe.

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