RU171609U1 - Phase separation device for azeotropic mixture rectification products - Google Patents

Abstract

The utility model relates to plants for the regeneration of organic solvents and can be used in chemical, petrochemical, and other industries. The device contains a cylindrical body with inlet and outlet nozzles. The inlet nozzle is connected to a vertically positioned pipe plugged from below, and a cylindrical cartridge filled with silica gel covers the bottom. The shell of the cylindrical cassette is made of metal mesh. Through holes are made in the pipe wall, communicating the pipe cavity with a cavity of a cylindrical cartridge. The technical result is to ensure highly efficient and reliable operation of the phase separation device for rectification products of the azeotropic mixture, which is quite simple structurally and does not require large manufacturing costs. Using the proposed utility model as part of the installation for the regeneration of spent cyclohexanone washing solvent on an industrial scale showed high efficiency and reliability of the phase separation device for rectifier products katsii azeotrope.

Description

The utility model relates to plants for the regeneration of organic solvents and can be used in chemical, petrochemical and other industries.

Many technological processes in industry and transport are associated with the use of organic solvents.

Spent wash solvents are regenerated to reuse the purified solvent.

Known installations for the regeneration of solvents (see, for example, RU 2264840, IPC B01D 3/00), in which waste solvents are purified using a vacuum distillation column and a reflux condenser.

These units are equipped with a phase separation device installed at the outlet of the reflux condenser for rectification products of the azeotropic mixture (phase separator operating on the principle of the Florentine vessel).

In the phase separator, water is separated from the condensed solvent vapors coming from the reflux condenser, then the condensate is sent in the form of reflux to the top of the distillation column, which is part of the solvent recovery device.

The phase separator is in communication with a container designed to collect the aqueous phase separated in the separator from the solvent.

Known dehumidifier containing a cylindrical body with inlet and outlet pipes (RU 74575, IPC B01D 45/12).

The dehumidifier is equipped with a swirl and a droplet.

Also known is a separator for heat and mass transfer processes, comprising a cylindrical body with inlet and outlet nozzles (RU 93958, IPC F28F 9/00).

This separator is equipped with a perforated pipe mounted coaxially to the housing axis and a corrugated shell with corrugations with a layer of capillary-porous material.

Known gas-liquid separator containing a vertical cylindrical body with inlet and outlet pipes (RU 2583268, IPC B01D 19/00).

This separator is equipped with an inner cylinder with a series of holes and a dispersing element.

A device for separating unstable emulsions containing a cylindrical body with inlet and outlet nozzles (RU 2110556, IPC B01D 17/04).

The device includes a separator - phase separator, equipped with coalescing elements.

In addition, it is known a device for separating glycol from a gas-liquid medium containing a cylindrical body with inlet and outlet nozzles (RU 164192, IPC B01D 17/04, 19/00).

The device is equipped with a soothing partition and a coagulation unit made of a polymer mesh material.

The closest analogue of the proposed utility model is a phase separator (separation module) for separating water from a water-hydrocarbon emulsion containing a cylindrical body with inlet and outlet nozzles (RU 2540305, IPC B01D 17/04).

The separation module is provided with a separating medium containing a coalescing layer and a layer for holding water droplets.

Known designs of phase separators, including a phase separator, selected as the closest analogue of the proposed utility model, are either ineffective when working as part of a solvent recovery plant, or are structurally complex, labor-consuming to manufacture and, accordingly, expensive.

Despite the wide variety of known phase separators, when carrying out technological processes using a reflux condenser and a distillation column, periodically there is a need to develop new designs of phase separation devices for the rectification products of an azeotropic mixture.

When developing a utility model, the technical problem was solved by expanding the arsenal of designs for phase separation devices for the rectification products of the azeotropic mixture used in solvent recovery plants.

The technical result consists in providing highly efficient and reliable operation of the phase separation device for the rectification products of the azeotropic mixture, which is quite simple in design and does not require large manufacturing costs.

The technical result is achieved by the fact that in the phase separation device for rectification products of an azeotropic mixture containing a cylindrical body with inlet and outlet nozzles, the inlet pipe is connected to a vertically positioned pipe muffled from below, in the lower part of which is covered a cylindrical cartridge filled with silica gel, the shell of which is made of a metal mesh, in this case, through holes are made in the pipe wall, communicating the pipe cavity with the cavity of the cylindrical cartridge.

It is this combination of essential features of the proposed utility model that allows to solve a technical problem and achieve a technical result, which is confirmed by practical application.

In the design of the device, the diameter of the cells of the shell of the cylindrical cartridge can be equal to 1.5-2.0 mm

The diameter of the through holes in the pipe wall may be 1.0-1.5 mm, and the distance between the centers of the holes may be 3.0-4.0 mm.

The diameters of the inlet pipe and the output pipe may be equal to each other.

The diameter of the shell of the cylindrical cartridge may be 5.0-7.0 outer pipe diameters.

The height of the cylindrical cartridge may be 1.0-1.5 of the outer diameter of the pipe.

The diameter of the housing may be 10.0-12.0 of the outer diameters of the pipe.

The height of the device may be 15.0-17.0 outer diameters of the pipe.

When designing, manufacturing and testing the phase separation device for the products of rectification of the azeotropic mixture, it was determined that such design parameters are optimal to ensure its high performance.

In FIG. the design of the phase separation device for rectification products of an azeotropic mixture in section is given.

The device comprises an inlet pipe with a vertically arranged pipe 1, made in the upper part of the cylindrical body 2.

In the lower part of the pipe 1 is covered by a cylindrical cassette 3, the shell 4 of which is made of metal mesh.

The diameter of the cells of the metal mesh from which the shell 4 of the cylindrical cassette 3 is made is 1.5-2.0 mm.

The bottom end of the pipe 1 is muffled by the bottom 5 of the cartridge 3.

Through holes 6 are made in the lower part of the wall of the pipe 1, communicating the cavity of the pipe 1 with the cavity of the cylindrical cartridge 3 ..

The diameter of the through holes 6 in the wall of the pipe 1 is 1.0-1.5 mm, and the distance between the centers of the holes 6 is 3.0-4.0 mm.

On the side surface of the upper part of the cylindrical body 2, an outlet pipe 7 is made for the exit of solvent.

Cassette 3 is filled with a backfill 8, consisting of crushed silica gel with a particle size of 2-5 mm.

In the lower conical part of the cylindrical body 2, an outlet pipe 9 is made for the exit of the aqueous phase.

The diameters of the inlet pipe and the output pipe are equal to each other.

The diameter of the shell 4 of the cassette 3 is 5.0-7.0 outer diameters of the pipe 1.

The height of the cartridge 3 is 1.0-1.5 of the outer diameters of the pipe 1.

The diameter of the housing 2 is 10.0-12.0 outer diameters of the pipe 1.

The height of the housing 2 is 15.0-17.0 of the outer diameters of the pipe 1.

The phase separation device for the rectification products of the azeotropic mixture works as follows.

The water emulsion in the solvent in the form of an azeotropic mixture comes, for example, from the reflux condenser of the solvent recovery unit into the pipe 1 of the inlet pipe of the device, passes through the holes 6 of the pipe 1, and enters the backfill layer 8 of the cartridge 3.

In cassette 3, finely dispersed water particles contained in the mixture collide with the surface of the particles of the backfill 8 and adhere to it due to the high hydrophilicity of the surface of the silica gel.

When the surface of the backfill 8 is saturated with the aqueous phase, the water droplets coarsen on its surface and roll down on the bottom 5 of the cartridge 8.

Then, water droplets exit the cassette 8 through the mesh cells of the shell 4, fall down and are removed from the device through the outlet pipe 9 into a container designed to collect the aqueous phase.

The solvent vapor leaves the cassette 8 through the mesh cells of the shell 4, rises up, exits the device in the form of phlegm through the outlet pipe 7, and is sent, for example, to the upper part of the distillation column of the solvent recovery device.

The proposed device design was developed for use as part of a large-sized installation for the regeneration of spent washing solvents.

The use of the proposed utility model for the regeneration of cyclohexanone on an industrial scale has shown the high efficiency and reliability of the phase separation device for rectification products of the azeotropic mixture.

Claims (8)

1. A phase separation device for rectification products of an azeotropic mixture, comprising a cylindrical body with inlet and outlet nozzles, characterized in that the inlet pipe is connected to a vertically located pipe muffled from below, in the lower part of which is covered a cylindrical cartridge filled with silica gel, the shell of which is made of a metal mesh, this in the wall of the pipe made through holes communicating the cavity of the pipe with the cavity of the cylindrical cassette. 2. The device according to p. 1, characterized in that the diameter of the cells of the shell of the cylindrical cartridge is 1.5-2.0 mm 3. The device according to claim 1, characterized in that the diameter of the through holes in the pipe wall is 1.0-1.5 mm, and the distance between the centers of the holes is 3.0-4.0 mm. 4. The device according to p. 1, characterized in that the diameters of the inlet pipe and the output pipes are equal to each other. 5. The device according to claim 1, characterized in that the diameter of the shell of the cylindrical cassette is 5.0-7.0 outer pipe diameters. 6. The device according to p. 1, characterized in that the height of the cylindrical cassette is 1.0-1.5 of the outer diameters of the pipe. 7. The device according to p. 1, characterized in that the diameter of its body is 10.0-12.0 outer diameters of the pipe. 8. The device according to p. 1, characterized in that the height of its body is 15.0-17.0 outer pipe diameters.

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