SU1607859A2 - Multistage bubble extractor - Google Patents

Abstract

The invention relates to apparatus for the extraction in liquid-liquid systems and can be used in chemical and adjacent fields. The goal is to increase the efficiency of the extraction process due to the additional mixing of liquids with gas in the annular channel between the nozzles of the mixing device. This is achieved by the fact that the apparatus is provided with gas-conducting tubes with closed upper ends and openings on them, with the holes in the tubes located above the lower edge of the external nozzle of the mixing device, and the lower ends of the gas-conducting tubes are fixed in partitions. 1 il.

Description

The invention relates to apparatus for the extraction in liquid-liquid systems, can be used in chemical and adjacent fields, and is an improvement of the invention according to the model No. 610535.

The purpose of the invention is to increase the efficiency of the extraction process due to the additional mixing of liquids with gas in the annular channel between the nozzles of the mixing device.

The drawing shows the proposed extractor.

The body 1 of the extractor is divided by partitions 2 into separate sections - settlers. Mixing devices consisting of internal 3 and external 4 concentric nozzles are installed on the partitions 2. The lower ends of the nozzles 3 protrude under the partition 2 and are gas distribution nozzles with openings 6 in the side walls. In partitions 2, flow tubes 7 are also provided, having openings 8 on the side of the lower loaded ends. On top of the tube 7 are covered with caps 9 having slots 10 in

the lower part and the holes 11 in the upper covers. Gas-carrying tubes 12 are fixed in the web of the partition 2, which in the upper plugged ends have openings 13 for the release of inert gas into the annular channel between the nozzles 3 and 4 of the mixing device.

The extractor works as follows.

The light liquid enters into the inside of the pipe 3 through the lower section of the gas distribution nozzle 5. There is heavy liquid through the holes 8 in the pipes 7. When jointly moving upward from inside the pipe 3, the liquids are intensively mixed by that part of the bubbling inert gas that flows through the gas distribution holes 6 of the gas nozzle 5 and, after mixing the liquids, is collected in the gas cushion under the partition 2. Another part of the inert gas flows through the holes 13 the gas outlet tube 12 in the annular channel between the nozzles 3 and 4. Pass there from the bottom up through the moving towards (from top to bottom) flow of liquids, inert gas intensively

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mixes it and then collects in a gas cushion under the partition 2. Mixed inert gas bubbles inside the nozzle 3 and, additionally, in the annular channel between the nozzles 4 and 3, the liquids exit to the settling section of the section where the separation of liquids occurs. The droplets of heavy liquid are deposited, forming on the partition 2 a continuous layer, from which the heavy liquid through the slots 10 enters the tubes 7 and flows into the underlying section. The number and size of the holes 13 in the tubes 12 are calculated and selected on the basis of the well-known laws of hydraulics, taking into account the required :: CH1 and the required intensity of movement: |: 1; pi liquids with an inert gas in the col- .tTKui channel between the nozzles 3 and 4 of the mixing device. And the number of i i zoopathic tubes 12, the arrival of w, is on the ;; a / kdoy mixing device, installs isacTCH depending on the size of the mixing devices taking into account the previous condition and the condition of uniform distribution, the exit w, out of the holes 13 of inert gas bubbles across the cross section of the annular channel between the nozzles 3 and 4. The cross section of the annular channel is determined under the condition that the velocity of the mixture of liquids from top to bottom is lower than the rate of ascent of gas bubbles leaving the B decree ny

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the channel of the holes 13 of the tubes 12. The location of the holes 13 of the gas-conducting tubes 12 above the lower edge of the nozzle 4 ensures that gas bubbles enter the annular channel between the nozzles 3 and 4.

Additional movement of liquids in the annular channel between the nozzles of the mixing device is equivalent to an increase in the residence time of the mixture of heavy and light liquids in the actively turbulized inert gas bubbles in the mixing device area, and this, as is known, leads to an increase in the efficiency of the extraction process.

Claims (1)

Invention Formula Multistage bubbling extractor autom. St. No. 610535, characterized in that, in order to increase the efficiency of the extraction process by providing additional mixing of the liquids with gas. an annular channel between the nozzles with the upper ends plugged and the openings on them; the openings in the tubes are located above the lower edge of the external nozzle of the mixing device, and the lower ends of the gas conductor tubes are fixed in partitions.