Self-suction three-mixing pipe two-level jet aeration device

Abstract

The invention discloses a self-suction three-mixing pipe two-level jet aeration device which comprises a submersible pump, a self-suction three-mixing pipe two-level jet aerator and a pipeline system, wherein the self-suction three-mixing pipe two-level jet aerator comprises a nozzle, a throat pipe, an air suction pipe, an air suction chamber, a conical flow divider, mixing pipes and a water suction pipe. The device disclosed by the invention forms high-speed high-pressure water jet at the nozzle by use of the submersible pump; due to the viscous effect between the jet boundary layer and air, the air is sucked into the air suction chamber and primarily mixed with the water jet in the throat pipe, and the liquid-air mixture is divided and cut by the conical flow divider and enters the three mixing pipes in radial arrangement; under the turbulent diffusion and carrying effect of the liquid-air mixture, water in an aeration tank is sucked into the mixing pipes to participate in the mass transfer process; and after the liquid and air are sufficiently mixed, the liquid-air mixture is discharged into the aeration tank and causes strong turbulence and rotational flow in the tank to quickly increase the dissolved oxygen in a water body. With a two-level structure sucking air before water, the device disclosed by the invention has the advantages of high oxygenation power efficiency and large aeration range.

Description

technical field [0001] The invention relates to an aeration device applicable to the fields of breeding and environmental protection, in particular to a self-priming three-mixing tube two-stage jet aeration device. Background technique [0002] At present, in the fields of aquaculture and environmental protection, water quality is often improved by enhancing water convection exchange and increasing dissolved oxygen. In actual production and life, two types of aeration equipment are often used, one is mechanical aeration aeration equipment, such as impeller aerator, waterwheel aerator and inflatable aerator, etc.; the other is It is a liquid-air jet aeration equipment, such as a single-stage or double-stage liquid-air jet pump. [0003] The impeller-type aerator or waterwheel-type aerator uses three-phase AC power supply, which consumes a lot of energy. Even if it consumes a lot of power, it can only increase oxygen to the surface water body, and the bottom water is still st...

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Problems solved by technology

[0003] The impeller-type aerator or waterwheel-type aerator uses three-phase AC power supply, which consumes a lot of energy. Even if it consumes a lot of power, it can only increase oxygen to the surface water body, and the bottom water is still stagnant. The oxygenation effect is poor and the power efficiency is low. Not high; inflatable aerators, microporous aeration aerators, etc. use electricity to fill the air to the bottom of the water, and the bubbles gradually surface under the action of buoyancy, so that the oxygen in the bubbles dissolves in the water

Aerated aeration and microporous aeration can increase oxygen at the bottom of the water and significantly increase the dissolved oxygen at the bottom. However, the water body is in a static state during the oxygenation process, and the convective exchange of the water body cannot be realized, and the uniformity of dissolved oxygen cannot be guaranteed.

The single-stage or double-stage jet aeration device mixes air through the high-speed liquid jet, but because the mass transfer process of liquid and gas mainly occurs in the aeration tank, and the gas is easy to escape from the aeration tank, so its mass transfer efficiency is not good. High, the kinetic efficiency of dissolved oxygen is not high

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