Micron-nano-sized aerator

Abstract

The invention discloses a micron-nano-sized aerator for sewage treatment and air flotation and the like. An air-water mixing chamber is arranged on the central side wall of a metal outer sleeve, a diffusion tube is communicated between the air-water mixing chamber and the metal outer sleeve, an air-water nozzle is arranged at the inlet end of the air-water mixing chamber, and a compression air inlet is arranged on the side part of the air-water mixing chamber, a micropore plastic round tube of which two ends are provided with spraying outlets is coaxially arranged at the center of the metal outer sleeve, a polytetrafluoroethylene plastic sheet is tightly matched between the micropore plastic round tube and the metal outer sleeve, micro pores the aperture of which is 1-3mum are distributed on the side wall of the micropore plastic round tube, a multi-layer cellular porous polytetrafluoroethylene plastic sheet is coated on the outer wall of the micropore plastic round tube, and the micro pores on each cellular porous polytetrafluoroethylene plastic sheet are arranged in a staggering way. The liquid sprayed from the spraying outlets is vaporous, the diameter of the air bubble is in nano level, the vaporized moisture is ascended together in water body, the contact area of the vaporized moisture and the water body is large, the retention period is long, the mass transfer rate coefficient is high and the concentration of the dissolved oxygen is high.

Description

technical field [0001] The invention relates to aeration equipment used for sewage treatment, air flotation, etc., in particular to an oxygenation aeration device, belonging to the technical field of sewage treatment. Background technique [0002] At present, there are two types of aeration devices commonly used in the field of sewage treatment: one is the blower aerator, which is composed of a pressurization device, a diffusion device and a piping system. The pressurization device generally uses a rotary blower, and some use a centrifugal blower. blower. In order to purify the air, an air filter is often installed on the intake pipe, and an air preheater is often installed in front of the intake pipe in cold regions. Diffusion devices generally include: small bubble diffusion devices, such as diffusion plates, diffusion tubes or diffusion plates, etc.; medium bubble diffusion devices, such as perforated tubes; large bubble diffusion devices, such as standpipe aeration, etc...

AI Technical Summary

Problems solved by technology

The general disadvantages of this kind of aeration device are: the aeration head is easy to block, resulting in a short circuit of the air flow, uneven oxygen supply, and a reduced oxygen utilization rate (generally below 10%). The sewage in the pool needs to be drained during maintenance. Long repair time and high maintenance cost

Compared with the traditional blower aeration, the jet aerator has improved power efficiency and oxygen utilization rate, and the bubble agitation and mixed liquid are relatively uniform, but the structure of the jet aerator is complicated, the suction volume is small, the quality of the bubbles is poor, and the power efficiency is low. Low, which affects the cost of water treatment, and because the gas-water mixture sprayed out by the ejector is not atomized, when the micro-bubbles rise, they are combined under water pressure to form large bubbles, which quickly surface to the water surface, causing energy waste

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