SU1674965A1 - Method of hydrodynamic treatment of fluid media - Google Patents

Abstract

The invention relates to the field of chemistry, hydrometallurgy and other areas, such as the manufacture of building materials. The purpose of the invention is to increase the processing efficiency. Liquid fluid (suspension, emulsion, pulp) is subjected to dynamic processing involving acoustic, cavitation effects with simultaneous introduction of oxygen and hydrogen in the cavitation zone in a 2: 1 ratio, which can explode when exploded. the vitation process. This increases the degree of dispersion of the fluid medium by increasing the hydrodynamic effect on the liquid. 1 h p f-ly.

Description

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The invention relates to the field of chemistry, hydrometallurgy and other areas, such as the manufacture of building materials, where multicomponent flowable media are used and the processing of suspensions, slurries and emulsions is necessary.

The aim of the invention is to increase the efficiency of the treatment process.

According to the method, hydrogen and oxygen in the form of fine bubbles are fed directly into the flow of suspension, pulp or emulsion directly into the cavitation treatment zone, for example, due to aeration of the flow. Fine bubbles of oxygen and hydrogen, combining in the process into larger ones due to turbulence and acoustic treatment of the flow, form bubbles of heated / what gas - explosive gas mixture.

Cavitation bubbles that occur during the processing of a fluid medium, and during the collapse have a pace. 500-800 ° C (4) and pressure up to 4000 atm, initiate blasting of gas bubbles (a mixture of 2 volumes of hydrogen and one oxygen), which increases the intensity of dynamic treatment of the fluid medium. The process goes on continuously, since hydrogen and oxygen are fed continuously in a 2: 1 ratio. Each bubble of detonating gas, entering the zone of collapse of the cavitation bubble, during an explosion also gives an instant local increase in temperature and pressure and the subsequent sharp depression, because simultaneously with the explosion the conversion of detonating gas into water follows, and the volume of the latter is insignificant compared to volume of primary bubble detonating gas.

Taking into account the fact that a significant amount of cavitation bubbles of detonating gas are simultaneously collapsing, high-level fluid is present in the fluid

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Cave vibrations with the possibility of crushing the treated medium and self-shattering of blast gas bubbles, making the vibration frequency even higher. Hydrogen is used in the process completely without accumulation in further operations, since the region of ignition of the latter in oxygen stably exists at concentrations of 4.1–96% (5).

Thus, the latitude of concentration from 4.1 to 96% guarantees the blasting of the entire mass of hydrogen bubbles.

The method of hydrodynamic processing of fluid media is implemented as follows.

Example 1. A slurry stream is piped, for example, to flotation. In the pipeline, the flow flows around a hydrodynamic pulp processing unit according to the ed. St. No. 1407560, which is an insert with cantilever elements oscillating with a natural frequency, which causes intense cavitation in the acoustic treatment zone. At the same time, hydrogen and oxygen are fed into the pulp through two separate channels with a gas flow rate from 0.01 m per 1 m of pulp to 0.3 NT per 1 m3 of pulp (depending on the required degree of impact on the pulp particle), which creates a uniform aeration of the fine bubbles of these gases.

Passing a zone of vibration inside and outside the body of the resonating insert, oxygen and hydrogen bubbles are crushed to form detonating gas bubbles. The latter explode, initiated by the collapse of cavitation bubbles, which have a temperature of 500-800 ° C and a pressure of up to 4000 atm during the collapse. When exploding bubbles of explosive gas, additional high-frequency vibration occurs, creating an additional component for resonating the acoustically active device. An additional effect is the release of heat into the pulp released from detonated blistering gas bubbles. The greatest effect is achieved when the acoustic devices are placed sequentially along the length of the pipeline. By adjusting the volume of feed gas, the degree of crushing of the pulp particles and the heating temperature of the pulp can be varied. An increase in the temperature of the pulp causes an additional release of bubbles of gas dissolved in the liquid medium, which also contributes to an increase in the intensity of cavitation and the hydrodynamic effect on the particles of the pulp.

Example 2. In the preparation of suspensions, the method is implemented using, for example, a device according to the author. St. Nk 772585, which is a grinding chamber with a nozzle for introducing the finished material and radial counter-directed nozzles, provided with longitudinal slots and counter-directed slit nozzles. Before entering the device stream

The suspension is aerated with fine bubbles of hydrogen and oxygen. When a slurry stream enters the reservoir with chambers, fine gas bubbles mix up to form larger detonating gas bubbles, and when the stream leaves the additional nozzles with a sharp drop in pressure, intense cavitation occurs, initiating resonant oscillations of the arcuate plates and body

Claims (2)

1. The method of hydrodynamic processing of fluid environments, including the flow of pressurized medium into a streamforming 0 or an acoustically active device, cavitation treatment with the presence of gas, characterized in that, in order to increase the efficiency of the treatment process, to the cavitation treatment zone 5 serves hydrogen and oxygen in the form of fine bubbles. 2. The method according to claim 1, wherein that hydrogen and oxygen are fed at a ratio of 2: 1. 0