Self-suction gas-liquid mixing impeller

Abstract

The invention relates to a self-inspiring type gas-liquid mixed impeller. The impeller mainly comprises a connecting axle connector, a hollow disc and a guide vane; wherein a separator inserter is arranged at the inner part of the hollow disc to separate the inner space of the hollow disc into two relatively independent spaces of an upper space and a lower space. The impeller can intake the gas through the negative pressure produced in the rotating process, and disperses the gas into the liquid in a way of micro bubble, and has the advantages of large inspiratory capacity, good gas-liquid mixing effect, low energy consumption and non impeller blockage and so on, and is widely used for the gas-liquid mixing and reacting field and the mutual separating field, and forms a variety of specialized equipments, such as waste water biochemical treatment equipment, air-flotation equipment, waste gas purification equipment and gas-liquid contact and reaction equipment in the fields of chemical industry, pharmacy, metallurgy, food and paper manufacture and so on.

Description

technical field [0001] The invention relates to a gas-liquid mixing device, in particular to a self-suction gas-liquid mixing impeller. Background technique [0002] The self-suction gas-liquid mixing impeller uses the negative pressure generated during the high-speed rotation of the impeller in the liquid to guide air or other gases from the hollow shaft driving the impeller or the sleeve outside the shaft to the impeller, and through the impeller. The gas is dispersed in the liquid in the form of microbubbles. It can be used in the field of chemical reaction between gas and liquid to improve mass transfer efficiency and simplify equipment structure; it can also be used in liquid-liquid separation and liquid-solid separation and other phase separation fields, such as removing solids, oil, fibers and other pollutants in sewage , can make pollutants adhere to the micro-bubbles, and rise to the water surface with the micro-bubbles, so as to achieve the purpose of pollutant se...

AI Technical Summary

Problems solved by technology

The disclosed impellers of US5091083, US5242600, US3414245, etc. include a plurality of hollow blades, and the air distribution holes are arranged on the rear side of the top of the blades. It utilizes the vacuum vortex generated on the rear side of the blades when the impeller rotates to introduce air into the impeller and release it into the water through the air distribution holes. ; This kind of impeller has low vacuum degree, small air suction capacity, and no suction and drainage capacity. It only depends on the agitation of the impeller to disperse the air bubbles, and the gas-liquid mixing and dispersion effect is poor; Enter the vacuum vortex and accumulate on the exhaust hole

The disclosed impellers of US6270061, US4297214, US2246560, US2238139, etc. are composed of upper and lower cover plates and guide vanes in the middle. The upper cover plate has no water inlet, and the air inlet is located at the center of the impeller; The generated negative pressure area sucks in air, mixes it with water inside the impeller, and discharges it from the periphery; the shortcoming of this impeller is that there is a contradiction that the suction volume and the suction displacement cannot be increased at the same time, and the number of impeller rotations or the volume of air sucked cannot The reason is that the water inlet and air inlet of the impeller are both located in the central area of ​​the impeller, and the air-water mixture is inhaled in the center of the impeller. As the number of revolutions increases or the air intake increases, the density of the air-water mixture decreases sharply, When cavitation occurs, the vacuum degree in the negative pressure area will decrease or even disappear, and there will be large fluctuations. The air suction volume and suction and discharge volume will also decrease and fluctuate violently, and the equipment will vibrate and be in an unstable operation state.

However, the structure of the self-priming gas-liquid mixing impeller can still be further improved to improve the performance of entrained air

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