SU1520419A1 - Apparatus for investigating phase equilibriums liquid-steam - Google Patents

Abstract

The invention relates to a physicochemical analysis and can be used to study the physicochemical properties of vapor and liquid, in particular vapor-liquid equilibrium. The purpose of the invention is to improve the accuracy of measurement results when removing kinetic characteristics by stopping the interaction of vapor and liquid during the sampling period of a liquid. The device comprises a cube connected to the bottom of the equilibrium chamber with a steam inlet tube, an equilibrium chamber, the bottom of which has through-holes, tubes for introducing liquid and evacuating steam, and a sampling fluid in the form of a funnel directly under the bottom of the equilibrium chamber. The presence of a bypass line for steam connecting the upper part of the equilibrium chamber to the steam inlet pipe using a three-way valve allows the flow of steam to be directed either to the lower part of the equilibrium chamber through the holes in its bottom or along the bypass line to its upper part. During the sampling period, when the three-way valve is switched to the bypass line, the steam is directed to the upper part of the equilibrium chamber, the liquid through the openings in the lower part falls into the sampler. As a result, the interaction of liquid and vapor is practically eliminated and the liquid retains the composition achieved by the time the sample is taken. 1 il.

Description

The invention relates to a physicochemical analysis and can be used to study the physicochemical properties of vapor and liquid, in particular vapor-liquid equilibrium.

The purpose of the invention is to improve the accuracy of the measurement results when the kinetic characteristics are removed by stopping the interaction of steam and liquid during the sampling period of a liquid.

The drawing shows the diagram of the proposed device and type A.

The device contains a cube 1, an equilibrium chamber 2, a liquid sampler 3 made in the form of a funnel, a tube for inlet 4 and a vapor outlet 5, a tube 6 for introducing fluid, a bypass line 7 for steam, a refrigerator 8, a heater 9 for liquid, glasses for sampling a pair of 10 and a liquid 11 and a three-way valve 12 with the possibility of connecting a pipe for introducing steam either with a part of the equilibrium chamber 2 through the holes 13 in its bottom, or along the bypass line of steam with its upper part.

The device works as follows.

The vapor from the cube 1 through the tube 4 enters the equilibrium chamber 2 through the holes 13 made in the filament part of the chamber 2, leaves the chamber through the tube 5, condenses in the refrigerator 8 and collects in the glass 10 for sampling the steam. The liquid of a given composition, heated to the temperature required for the experiment, enters the equilibrium chamber 2 through the tube 6 from the preheater 9, where it interacts with the steam. The start time of the interaction is fixed. After this period of time, a liquid sample is taken.

The sampling of the fluid is carried out as follows. The three-way valve 12 is switched to the bypass line 7, as a result of which the interaction of the vapor with the liquid is stopped, since the vapor does not flow into the equilibrium chamber. The liquid through the holes 13 in the lower part of the chamber falls into the liquid sampler 3 and flows into the glass 1 1 to take a sample of the liquid. Then, the next portion of liquid of the same initial composition is poured into the preheater 9, and the experiment is repeated again with a different time interval.

The use of the proposed device allows reducing the time of liquid interaction with steam from 10 15 seconds, necessary for taking a representative sample of a liquid, to 1 2 seconds, during which steam passes through the device after the three-way valve is shut off.

Claims (1)

Invention Formula A device for studying phase equilibria of a liquid. A vapor containing a cube, an equilibrium chamber, tubes for introducing steam and liquid into an equilibrium chamber, a liquid sampler and a tube for removing steam from an; equilibrium chamber, characterized in that, in order to improve the accuracy of measurement results removing the kinetic characteristics by stopping the interaction of liquid and steam during the sampling of a liquid, it contains a bypass line for steam, the steam inlet tube is connected to the bottom of the equilibrium chamber, in which Air holes, the upper part of the equilibrium chamber is connected by a steam bypass line to the steam pipe, and a three-way valve is installed on the bypass line at the junction with the steam pipe and a steam valve can be connected to the lower part of the equilibrium chamber through the holes in its bottom, or along the vapor bypass line with its upper part, and the liquid sampler is made in the form of a funnel located directly under the bottom of the equilibrium chamber.