SU1520014A1 - Mixture separating device - Google Patents

Abstract

The device is designed to separate dispersed systems, treat wastewater and desalinate salt water in water desalination plants at coastal stations and seagoing vessels by creating overpressure. The device comprises a vertical body 1 with an evaporation zone 2, inside which a central tube 3 is installed, provided in the upper part 4 with a cooler 5 and communicating with the upper end 6 with an evaporation zone. The casing is made with a profile with a constricted part 7, which is connected to the drain valve 8, and is equipped with a valve 9 for supplying a source liquid, such as salt water. The evaporation zone is connected to the purge valve 10, the central pipe to the valve 11 for draining the secondary juice vapor, the cooler to the valves 12 for supplying the cooling medium and 13 for discharging it. The valve 9 is connected to a container 14 filled with the source liquid for evaporation. 1 il.

Description

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The invention relates to chemical permeability and can be used in desalination plants of seagoing ships, in coastal saltwater desalination plants, as well as in installations for separating disperse systems and treating wastewater.

The core of the invention is the intensification of heat and mass transfer by creating an overpressure,

The drawing shows the proposed device for the separation of mixtures.

The device contains a vertical case with an evaporation zone 2, inside which a tube 11 is mounted center 11, provided with a cooler 5 in the upper part 4 and a common air cooler 5 with an upper end 6 with an evaporation zone. The housing 1 is made of professional with a narrowed part 7 connected to the drain valve 8, and is equipped with a valve 9 for supplying a source liquid, such as salt water. The evaporation zone 2 is connected to the valve 10 for purging, the pipe 3 to the valve 11 to discharge the condensate of the secondary (juice) steam, the cooler 5 to the valves for supplying 12 and discharging the cooling medium 13, the evaporation zone 2 is connected through the valve 9 to tank 14, filled with the original liquid.

The device works as follows

From the container 14, the initial liquid (liquid or dispersed mixture intended for evaporation) is supplied to the evaporation zone 2 of the housing 1. Heat g is supplied to the zone. The resulting vapors enter the annular channel between the pipe 3 and the constricted part 7 of the housing 1, where they condense. The abrupt change in the cross section of the housing over the evaporation zone provides separation of the droplet moisture from the vapor, when the latter from the evaporation zone enters the annular channel. At low heat loads, condensate in the annular channel in the form of a film flows along a pipe.

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Be 3 and the inner surface of the narrowed part of the body. As the heat load increases, the vaporization process is intensified, and the vapor flow rate increases. When the vapor flow rate at the inlet to the constricted part of the body (above the evaporation zone) of the critical velocity is exceeded, the vapors will capture the condensate film flowing down and feed into the central tube, from where the condensate is discharged through the valve 11. Thus, at vapor velocities higher than the critical one, a place in the annular channel, the condensation of vapor in the upward-biased two-phase flow, which leads to the disruption of condensate droplets from the channel walls, their fragmentation and the formation of a developed interfacial surface, as a result of which the natural separation of the components of the working media subjected to separation, and the process of heat and mass transfer is intensified, since heat losses with the secondary vapor are eliminated and the heat of the latter can be utilized.

The implementation of the body profile with the constricted part will allow to provide excessive pressure inside the body and to intensify the heat transfer in 1.5-1.7 times compared with the known devices.

Claims (1)

Invention Formula A device for separating mixtures, comprising a vertical housing with an evaporation zone, inside which a central tube is installed, provided in the upper part with a cooler and communicating with the upper end with an evaporation zone, characterized in that, in order to intensify heat and mass transfer by creating an excessive dynamic pressure, the housing is shaped with a constricted portion located above the evaporation zone between the cooler and the pipe.