CN106442897A - Decompression gas-liquid balance measuring system - Google Patents
Decompression gas-liquid balance measuring system Download PDFInfo
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- CN106442897A CN106442897A CN201611057353.0A CN201611057353A CN106442897A CN 106442897 A CN106442897 A CN 106442897A CN 201611057353 A CN201611057353 A CN 201611057353A CN 106442897 A CN106442897 A CN 106442897A
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Abstract
A decompression gas-liquid balance measuring system is composed of a gas cylinder, a liquid phase sampling tank, a gas phase sampling tank, an adjustable power supply, a decompression and pressure stabilizing tank, a decompression buffer tank, a rotary-vane vacuum pump and a gas-liquid balance device, wherein the gas-liquid balance device is composed of a gas-liquid balance kettle, a precision mercurial thermometer, an electric heating rod and a glass condensation pipe. The decompression gas-liquid balance measuring system can perform smooth sampling under the high vacuum degree, and therefore the defect that sampling of a manual needle cylinder is difficult is overcome.
Description
Technical field
The present invention relates to thermodynamic data measure field, more particularly to a kind of decompression vapor liquid equilibrium measurement system.
Background technology
Vapor liquid equilibrium data are industrial distillation technology, simulation calculating, computer-aided design, physical property estimation and chemical process
The improved basis of flow scheme design.With the continuous development of Chemical Manufacture, existing vapor liquid equilibrium data are far from meeting needs.Many
The equilibrium criterion of material is difficult to be directly obtained by Theoretical Calculation, it is necessary to by measuring.In terms of thermodynamic study, new heating power
The exploitation of model is learned, comparison screening of various thermodynamical models etc. also be unable to do without a large amount of accurate VLE measured datas.By
In the complexity of VLE system and the continuous development of detemination of VLE Data technology, it is each that detemination of VLE Data also form feature
Different variety classes.Pressing force is divided, the measure for having normal pressure, decompression and high pressure vapor liquid equilibrium.
Rectification is often carried out at reduced pressure conditions for the higher liquid mixture of boiling point under normal pressure, therefore industrial normal
The problem of rectification under vacuum can be run into.Simulation and the design of vacuum rectification tower is carried out, its decompression vapor liquid equilibrium data is indispensable.?
In the continuous mode of decompression vapor liquid equilibrium data, once vacuum is higher（As -90 kPa）The sampling of manual syringe can be caused difficult,
And a certain amount of air of meeting enters equilibrium still and causes the inaccurate situation of data.
Content of the invention
The technical problem to be solved is to provide a kind of decompression vapor liquid equilibrium survey for the above-mentioned state of the art
Determine system.
The technical scheme adopted by present invention solution above-mentioned technical problem is a kind of decompression vapor liquid equilibrium measurement system, bag
Include：Gas bomb 1, its top is provided with gas outlet；Liquid phase sampling jar 4 and gas phase sampling jar 9, both structures are consistent, thereon
Portion is provided with gas port, sample inlet, and its underpart is provided with sample export；Regulated power supply 7, which is provided with voltage output end；Subtract
Pressure vacuum tank 11, its top is provided with air inlet, gas outlet and vacuum meter 12；Pressure-reducing cushioning tank 13, its top is provided with first
Air inlet, the second air inlet, gas outlet, its underpart is provided with pressure relief opening；Rotary-vane vaccum pump 17, is provided with air inlet and aerofluxuss
Mouthful；Vapor liquid equilibrium device 6, is made up of gas-liquid balancing kettle 61, accurate mercurial thermometer 62, electrically heated rod 63, glass cold traps 64；
Described gas-liquid balancing kettle 61 is Ellis gas-liquid balancing kettle.
As improvement, liquid phase sample tap A and gas phase sample tap B on described gas-liquid balancing kettle 61, is provided with；Described glass
The lower end of glass condensing tube 64 is internal with gas-liquid balancing kettle 61 to be connected；Described accurate mercurial thermometer 62 is from gas-liquid balancing kettle 61
Top is inserted into central upper portion position and the internal cavity with gas-liquid balancing kettle 61 is isolated；Described electrically heated rod 63 is flat from gas-liquid
The bottom of weighing apparatus kettle 61 is inserted into lower central position and the internal cavity with gas-liquid balancing kettle 61 is isolated.
Improve again, described gas bomb 1 is connected with first mouth of the first threeway by the first pipeline, in first pipe
Air relief valve 2 is provided with road；The gas port of described liquid phase sampling jar 4 passes through second mouth phase of the second pipeline and the first threeway
Connection, the sample inlet of liquid phase sampling jar 4 is connected with the liquid phase sample tap A of gas-liquid balancing kettle 61 by the 3rd pipeline, the
The first ball valve 5 is provided with three pipelines, the sample export of liquid phase sampling jar 4 is connected with one end of the 4th pipeline, in the 4th pipe
The second ball valve 3 is provided with road；The gas port of described gas phase sampling jar 9 is by the 5th pipeline and first mouth of the second threeway
It is connected, the sample inlet of gas phase sampling jar 9 is connected with the gas phase sample tap B of gas-liquid balancing kettle 61 by the 6th pipeline,
The 3rd ball valve 8 is provided with 6th pipeline, and the sample export of gas phase sampling jar 9 is connected with one end of the 7th pipeline, the 7th
The 4th ball valve 10 is provided with pipeline；3rd mouth of the first threeway is connected with second mouth of the second threeway by the 8th pipeline
Logical；First air inlet of described pressure-reducing cushioning tank 13 is connected with the 3rd mouth of the second threeway by the 9th pipeline,
The first needle valve 15 is provided with nine pipelines, and the second air inlet of pressure-reducing cushioning tank 13 is by the tenth pipeline and pressure-reduced and-regulated tank 11
Gas outlet be connected, be provided with the second needle valve 14 on the tenth pipeline, the gas outlet of pressure-reducing cushioning tank 13 passes through the 11st
Pipeline is connected with the air inlet of rotary-vane vaccum pump 17, is provided with the 3rd needle valve 16 on the pressure relief opening of pressure-reducing cushioning tank 13；
Described 11 air inlet of pressure-reduced and-regulated tank is connected with the upper end of glass cold traps 64 by the 12nd pipeline；Described adjustable electric
The voltage output end in source 7 is connected with the voltage input end of electrically heated rod 63 by wire.
Improve further, in described gas bomb 1, be mounted with nitrogen or argon or helium.
Compared with prior art, it is an advantage of the current invention that：1st, when the vacuum of gas-liquid balancing kettle is higher（As -90
KPa pressure）The vacuum of pressure-reducing cushioning tank can be used（It is generally near -100 kPa pressure）Sample is extracted in sampling jar, from
And avoid the difficult deficiency of manual syringe sampling；2nd, the system is conducive to carrying out automatization to which changing using valve transfer sampling
Enter.
Description of the drawings
Fig. 1 is a kind of schematic flow sheet of decompression vapor liquid equilibrium measurement system of the present invention.
Fig. 2 is a kind of schematic diagram of the vapor liquid equilibrium device of decompression vapor liquid equilibrium measurement system of the present invention.
Fig. 3 is a kind of schematic diagram of the working condition one of decompression vapor liquid equilibrium measurement system of the present invention.
Fig. 4 is a kind of schematic diagram of the working condition two of decompression vapor liquid equilibrium measurement system of the present invention.
Fig. 5 is a kind of schematic diagram of the working condition three of decompression vapor liquid equilibrium measurement system of the present invention.
Wherein：1 is gas bomb, and 2 is air relief valve, and 3 is the second ball valve, and 4 is liquid phase sampling jar, and 5 is that the first ball valve, 6 are
Vapor liquid equilibrium device（Dotted line inframe）, 7 is regulated power supply, and 8 is the 3rd ball valve, and 9 is gas phase sampling jar, and 10 is the 4th ball valve, 11
For pressure-reduced and-regulated tank, 12 is vacuum meter, and 13 is pressure-reducing cushioning tank, and 14 is the second needle valve, and 15 is the first needle valve, and 16 is the 3rd
Needle valve, 17 is rotary-vane vaccum pump, and 61 is gas-liquid balancing kettle, and 62 is accurate mercurial thermometer, 63 electrically heated rods, and 64 is glass
Condensing tube, it is gas phase sample tap that A is liquid phase sample tap, B.
Specific embodiment
Below in conjunction with accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4 and accompanying drawing 5, the present invention is made further in detail by embodiment
Description.
Gas bomb 1, its top is provided with gas outlet, is mounted with nitrogen or argon or the one kind in helium inside which；
Liquid phase sampling jar 4 and gas phase sampling jar 9, both structures are consistent, and its top is provided with gas port, sample inlet, and its underpart is arranged
There is sample export；Regulated power supply 7, which is provided with voltage output end；Pressure-reduced and-regulated tank 11, its top is provided with air inlet, gives vent to anger
Mouth and vacuum meter 12；Pressure-reducing cushioning tank 13, its top is provided with the first air inlet, the second air inlet, gas outlet, and its underpart is arranged
There is pressure relief opening；Rotary-vane vaccum pump 17, is provided with air inlet and air vent；Vapor liquid equilibrium device 6, by gas-liquid balancing kettle 61, essence
Close mercurial thermometer 62, electrically heated rod 63, glass cold traps 64 are constituted；Described gas-liquid balancing kettle 61 is Ellis vapor liquid equilibrium
Kettle.Liquid phase sample tap A and gas phase sample tap B is provided with gas-liquid balancing kettle 61；The lower end of described glass cold traps 64 and gas
The internal connection of liquid equilibrium still 61；Described accurate mercurial thermometer 62 is inserted into central upper portion position from the top of gas-liquid balancing kettle 61
Put and isolate with the internal cavity of gas-liquid balancing kettle 61；Described electrically heated rod 63 is inserted into from the bottom of gas-liquid balancing kettle 61
The portion center and internal cavity with gas-liquid balancing kettle 61 is isolated.Gas bomb 1 by the first pipeline and the first threeway the
One mouth is connected, and is provided with air relief valve 2 on the first pipeline；The gas port of described liquid phase sampling jar 4 passes through the second pipeline
It is connected with second mouth of the first threeway, the sample inlet of liquid phase sampling jar 4 is by the 3rd pipeline and gas-liquid balancing kettle 61
Liquid phase sample tap A is connected, and is provided with the first ball valve 5, the sample export of liquid phase sampling jar 4 and the 4th pipeline on the 3rd pipeline
One end be connected, be provided with the second ball valve 3 on the 4th pipeline；The gas port of described gas phase sampling jar 9 is managed by the 5th
Road is connected with first mouth of the second threeway, and the sample inlet of gas phase sampling jar 9 is by the 6th pipeline and gas-liquid balancing kettle 61
Gas phase sample tap B be connected, be provided with the 3rd ball valve 8 on the 6th pipeline, the sample export of gas phase sampling jar 9 and the 7th pipe
The one end on road is connected, and is provided with the 4th ball valve 10 on the 7th pipeline；3rd mouth of the first threeway by the 8th pipeline with
Second mouth of the second threeway is connected；First air inlet of described pressure-reducing cushioning tank 13 is by the 9th pipeline and the second threeway
The 3rd mouth be connected, be provided with the first needle valve 15 on the 9th pipeline, the second air inlet of pressure-reducing cushioning tank 13 passes through
Tenth pipeline is connected with the gas outlet of pressure-reduced and-regulated tank 11, is provided with the second needle valve 14, pressure-reducing cushioning on the tenth pipeline
The gas outlet of tank 13 is connected with the air inlet of rotary-vane vaccum pump 17 by the 11st pipeline, the pressure relief opening of pressure-reducing cushioning tank 13
On be provided with the 3rd needle valve 16；Described 11 air inlet of pressure-reduced and-regulated tank is upper with glass cold traps 64 by the 12nd pipeline
End is connected；The voltage output end of described regulated power supply 7 is connected with the voltage input end of electrically heated rod 63 by wire.
A kind of work process of decompression vapor liquid equilibrium measurement system of the present invention is as follows：
（1）Add testing liquid mixture in gas-liquid balancing kettle 61, it is ensured that air relief valve 2, the second ball valve 3, the first ball valve 5, the
Three ball valves 8, the 4th ball valve 10, the second needle valve 14, the first needle valve 15, the 3rd needle valve 16 are closed, and open rotary vane type vacuum
Pump 17, slowly opens the second needle valve 14 and adjusts registration of its aperture so as to adjust vacuum meter 12 and maintain required vacuum,
The on and off switch of regulated power supply 7 is opened, output voltage is adjusted to a setting value, so that the slow heating of electrically heated rod 63 is until treat
Survey liquid mixture to seethe with excitement in gas-liquid balancing kettle 61, now a kind of work shape of decompression vapor liquid equilibrium measurement system of the present invention
State is maintained and treats gas-liquid two-phase complete equipilibrium in 1 ~ 2 hour as shown in figure 3, arrow is oriented to the flow direction of gas or liquid.（2）Open
First ball valve 5 and the 3rd ball valve 8, slowly open the first needle valve 15, now under the swabbing action of pressure-reducing cushioning tank 13, gas-liquid
Liquid phase in equilibrium still 61 enters into liquid phase sampling jar 4 by the 3rd pipeline, and the gas phase in gas-liquid balancing kettle 61 is managed by the 6th
Road enters gas phase sampling jar 9, and now a kind of working condition of decompression vapor liquid equilibrium measurement system of the present invention is as shown in figure 4, arrow
Head is oriented to the flow direction of gas or liquid, when the sampling amount of above-mentioned two sampling jar is above 1 mL, closes the first needle valve
15th, the first ball valve 5 and the 3rd ball valve 8.（3）Closing type vacuum pump 17, the on and off switch of regulated power supply 7 is closed, slowly open the
Three needle valvies 16 carry out pressure release, open air relief valve 2 and maintain its pressure in 30 kPa or so, open the second ball valve 3 and the 4th ball valve
Sampling is discharged respectively, the bottled load of usable samples, now a kind of working condition of decompression vapor liquid equilibrium measurement system of the present invention
As shown in figure 5, arrow is oriented to the flow direction of gas or liquid.
Claims (4)
1. a kind of decompression vapor liquid equilibrium measurement system, it is characterised in that：Described system includes：Gas bomb, its top is arranged
There is gas outlet；Liquid phase sampling jar and gas phase sampling jar, both structures are consistent, and its top is provided with gas port, sample inlet, its
Bottom is provided with sample export；Regulated power supply, which is provided with voltage output end；Pressure-reduced and-regulated tank, its top be provided with air inlet,
Gas outlet and vacuum meter；Pressure-reducing cushioning tank, its top is provided with the first air inlet, the second air inlet, gas outlet, and its underpart is arranged
There is pressure relief opening；Rotary-vane vaccum pump, is provided with air inlet and air vent；Vapor liquid equilibrium device, by gas-liquid balancing kettle, accurate hydrargyrum
Thermometer, electrically heated rod, glass cold traps are constituted；Described gas-liquid balancing kettle is Ellis gas-liquid balancing kettle.
2. system according to claim 1, it is characterised in that：Be provided with described gas-liquid balancing kettle liquid phase sample tap and
Gas phase sample tap；The lower end of described glass cold traps is connected with inside gas-liquid balancing kettle；Described accurate mercurial thermometer from
The top of gas-liquid balancing kettle is inserted into central upper portion position and is isolated with the internal cavity of gas-liquid balancing kettle；Described electrically heated rod
Lower central position is inserted into from the bottom of gas-liquid balancing kettle and isolates with the internal cavity of gas-liquid balancing kettle.
3. system according to claim 1, it is characterised in that：Described gas bomb is by the first pipeline and the first threeway
First mouth be connected, be provided with air relief valve on the first pipeline；The gas port of described liquid phase sampling jar passes through second pipe
Road is connected with second mouth of the first threeway, and the sample inlet of liquid phase sampling jar passes through the liquid of the 3rd pipeline and gas-liquid balancing kettle
Phase sample tap is connected, and is provided with the first ball valve on the 3rd pipeline, and the one of the sample export of liquid phase sampling jar and the 4th pipeline
End is connected, and is provided with the second ball valve on the 4th pipeline；The gas port of described gas phase sampling jar is by the 5th pipeline and the
First mouth of two threeways is connected, and the sample inlet of gas phase sampling jar is passed through the 6th pipeline and sampled with the gas phase of gas-liquid balancing kettle
Mouth is connected, and is provided with the 3rd ball valve on the 6th pipeline, and the sample export of gas phase sampling jar is connected with one end of the 7th pipeline
Logical, the 4th ball valve is provided with the 7th pipeline；3rd mouth of the first threeway passes through the second of the 8th pipeline and the second threeway
Individual mouth is connected；First air inlet of described pressure-reducing cushioning tank is connected with the 3rd mouth of the second threeway by the 9th pipeline
Logical, the first needle valve is provided with the 9th pipeline, the second air inlet of pressure-reducing cushioning tank is by the tenth pipeline and pressure-reduced and-regulated
The gas outlet of tank is connected, and is provided with the second needle valve on the tenth pipeline, and the gas outlet of pressure-reducing cushioning tank is managed by the 11st
Road is connected with the air inlet of rotary-vane vaccum pump, is provided with the 3rd needle valve on the pressure relief opening of pressure-reducing cushioning tank；Described subtracts
Pressure vacuum tank air inlet is connected with the upper end of glass cold traps by the 12nd pipeline；The voltage output of described regulated power supply
End is connected with the voltage input end of electrically heated rod by wire.
4. system according to claim 1, it is characterised in that：Nitrogen or argon or helium is mounted with described gas bomb
Gas.
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| CN201611057353.0A CN106442897B (en) | 2016-11-26 | 2016-11-26 | A kind of decompression vapor liquid equilibrium measurement system |
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| CN201611057353.0A CN106442897B (en) | 2016-11-26 | 2016-11-26 | A kind of decompression vapor liquid equilibrium measurement system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515281A (en) * | 2017-10-03 | 2017-12-26 | 宁波工程学院 | A kind of VLE under reduced pressure system with automatic pressure-controlled function |
| CN107727805A (en) * | 2017-10-18 | 2018-02-23 | 中石化炼化工程（集团）股份有限公司 | HTHP gas-liquid phase equilibrium test device and method |
| CN108508057A (en) * | 2018-06-26 | 2018-09-07 | 常州大学 | A kind of low pressure phase equilibrium experimental device and on-line period measurement method |
| CN108760959A (en) * | 2018-06-07 | 2018-11-06 | 青岛大学 | A kind of decompression vapor liquid equilibrium device with automatic pressure-controlled test sample function |
| CN109307729A (en) * | 2018-09-12 | 2019-02-05 | 中国原子能科学研究院 | Nitrous acid vapor liquid equilibrium assigned unit and method in a kind of measurement nitric acid solution |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515281A (en) * | 2017-10-03 | 2017-12-26 | 宁波工程学院 | A kind of VLE under reduced pressure system with automatic pressure-controlled function |
| CN107727805A (en) * | 2017-10-18 | 2018-02-23 | 中石化炼化工程（集团）股份有限公司 | HTHP gas-liquid phase equilibrium test device and method |
| CN108760959A (en) * | 2018-06-07 | 2018-11-06 | 青岛大学 | A kind of decompression vapor liquid equilibrium device with automatic pressure-controlled test sample function |
| CN108760959B (en) * | 2018-06-07 | 2020-06-23 | 青岛大学 | Pressure-reducing gas-liquid balancing device with automatic pressure-controlling and sample-measuring functions |
| CN108508057A (en) * | 2018-06-26 | 2018-09-07 | 常州大学 | A kind of low pressure phase equilibrium experimental device and on-line period measurement method |
| CN108508057B (en) * | 2018-06-26 | 2023-07-25 | 常州大学 | Low-voltage phase balance experimental device and online sampling and measuring method |
| CN109307729A (en) * | 2018-09-12 | 2019-02-05 | 中国原子能科学研究院 | Nitrous acid vapor liquid equilibrium assigned unit and method in a kind of measurement nitric acid solution |
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|---|---|
| CN106442897B (en) | 2018-10-19 |
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