RU145366U1 - MIXING DEVICE FOR GAS-LIQUID SYSTEMS - Google Patents

Abstract

A mixing device for gas-liquid systems, comprising a housing, an injection chamber, a spray, a mixer, a dispersant perpendicular to the axis of the pipe, characterized in that a thick-walled distribution cup with openings at different angles for the exit of the gas-liquid mixture is installed at the end of the mixer.

Description

The utility model relates to devices that are used to carry out the processes of mixing liquid with gas, as well as their chemical interaction. It can be used in the oil refining, petrochemical, chemical, food, pharmaceutical, microbiological and metallurgical industries.

In order to intensify the phase mixing process, an alternating change in the shape and direction of the flow, impact of the flow on solid bump barriers, swirling, mutual ejection and phase inversion, application of pulsations, and effective atomization of the liquid are used.

Known devices in which a thick-walled glass with holes is used to spray liquid (Planovsky AN, Nikolaev PI Processes and apparatuses of chemical and petrochemical technology - M .: "Chemistry", 1987. p. 294). The glass is a cylinder with holes in the walls. During operation of a thick-walled dispensing cup, liquid enters the cup and flows out of it through openings in separate jets at different angles.

The closest structural analogue is a mixing device for a gas-liquid system [patent for invention RU 83943 U1 (B01F 5/04)], which we will take as a prototype. The mixing device comprises a housing, an injection chamber, a liquid atomizer, mixers made in the form of a vertical pipe of constant diameter, smoothly branching into three to five nozzles, a continuous dispersant, curved perpendicular to the axes of the nozzles.

The device operates as follows. Liquid under pressure is supplied to the atomizer, atomized and sucks in the gas entering the injection chamber. Directly at the outlet of the atomizer in the injection chamber, the first stage of liquid-gas contact occurs. The resulting gas-liquid mixture passes through the pipe. In the pipe and mixers, the second phase of the contact of the liquid and gas proceeds due to the developed surface of the atomized liquid, which causes phase inversion. When a gas-liquid stream hits a dispersant, gas bubbles are crushed. The fourth stage of gas-liquid contact occurs. In the reaction volume, the fourth stage of gas-liquid contact is carried out.

The disadvantage of the prototype is that the jets are directed to the lower part of the apparatus and if viscous liquids are used for mixing, the mixing region will be limited. Intensive mixing in the entire volume does not occur.

The objective of the proposed utility model is to provide an intensive process of mixing gas and liquids of various viscosities by increasing the contact surface of these phases and increasing the speed of its updating by changing the direction of the flow and its impact on solid obstacles.

The problem is achieved in that the mixing device for gas-liquid systems contains a housing 1; injection chamber 2; liquid atomizer 3; the mixer 4, made in the form of a hollow pipe, at the end of which is installed a thick-walled distribution cup 5 with holes at various angles; dispersant 6 located perpendicular to the axis of the pipe.

In FIG. 1 shows the proposed mixing device for gas-liquid systems.

A mixing device for gas-liquid systems works as follows.

The liquid under pressure is supplied to the liquid atomizer 3, atomized and sucks in the gas entering the injection chamber 2. The resulting gas-liquid mixture passes through the mixer, where the gas is mixed intensively with the liquid. In the mixer, the first phase of liquid-gas contact occurs, due to the developed surface of the atomized liquid. Depending on the operating mode of the mixer, its geometrical parameters and the pressure drop across the atomizer, a gas-liquid two-phase flow with a different ratio of liquid to gas can form in the mixer. The two-phase flow can be with a dispersed liquid or gas phase. Under certain conditions, phase inversion can occur in the mixer itself, and the gas phase becomes dispersed. This mode of operation is most effective due to the fact that at the moment of inversion the highest value of the mass transfer coefficient is observed. At the outlet of the mixer there is a thick-walled distribution cup 5 with holes at various angles. The gas-liquid flow exits the openings in various directions. Part of the jets hits the dispersant 6; a part hits the walls of the apparatus; part enters the reaction volume of the apparatus, mixing it. All this leads to a significant intensification of the mixing process by increasing the contact surface of the phases.

The technical result of the proposed utility model is to provide an intensive process of mixing gas and liquids of various viscosities by mixing the reaction volume with jets, as well as increasing the contact surface of the phases and the rate of its renewal due to the impact of jets on a solid barrier. This is achieved by the fact that at the end of the mixer there is a thick-walled distribution cup with holes at various angles for the exit of the gas-liquid mixture.

Claims (1)

A mixing device for gas-liquid systems, comprising a housing, an injection chamber, a spray, a mixer, a dispersant perpendicular to the axis of the pipe, characterized in that a thick-walled distribution cup with openings at different angles for the exit of the gas-liquid mixture is installed at the end of the mixer.