CN206848111U - Normal temperature and pressure gas solubility determines device - Google Patents

Abstract

The gas solubility measuring device at normal temperature and pressure includes a balance chamber. The upper end of the balance chamber is connected to the vacuum pump through the first pipeline, the first valve is installed on the first pipeline, the top cover is installed on the opening of the balance chamber, and the center of the top cover is installed Pressure gauge, the bottom of the balance chamber is connected to the cylinder through the second pipeline, the second valve and the third valve are installed on the second pipeline, and the third pipeline is communicated with the second pipeline between the second valve and the third valve, A fourth valve is installed on the third pipeline, a bracket is fixedly connected to the outer wall of the cylinder, a displacement monitor is installed on the bracket, and the thimble of the displacement monitor leans against the piston rod of the cylinder.

Description

Gas Solubility Measuring Device at Normal Temperature and Pressure

technical field

The utility model relates to a gas solubility measuring device at normal temperature and pressure.

Background technique

The solubility of gas in liquid involves a wide range of fields, such as: chemical process design, environmental chemistry, biomedical technology, biophysics, geochemistry, etc. It is very important basic data in industry. The solubility of gas is mostly tested by constant volume method. Because the solubility of gas in liquid is very small, it brings great difficulties to the test, and the test results are not easy to measure accurately. Existing test devices include complex solvent purification devices and too many adapters and valves, which not only make the air tightness check of the device complicated, but also make it difficult to clean the pipeline.

Contents of the invention

The purpose of the utility model is to provide a gas solubility measuring device at normal temperature and pressure, so as to realize the gas solubility test at normal temperature and pressure, and solve the technical problems of insufficient test accuracy and sealing performance of existing instruments.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a gas solubility measuring device at normal temperature and pressure, including a balance chamber, the upper end of the balance chamber is connected with a vacuum pump through a first pipeline, and a first valve is installed on the first pipeline. A top cover is installed on the opening of the chamber, and a pressure gauge is installed in the center of the top cover. The bottom of the balance chamber is connected to the cylinder through the second pipeline, and the second valve and the third valve are installed on the second pipeline. The second pipeline between the valves is connected with a third pipeline, a fourth valve is installed on the third pipeline, a bracket is fixedly connected to the outer wall of the cylinder, a displacement monitor is installed on the bracket, and the thimble of the displacement monitor is against the cylinder. on the piston rod.

The beneficial effects of the utility model are as follows: the utility model can firstly separate out the rest of the gas in the solution by means of vacuum pumping, and then enter the gas from the bottom of the solution to fully dissolve the gas in the solution; on the other hand, the utility model can For different types of gas tests, it is only necessary to replace the gas in the piston container with a single gas (such as O ₂ , CO ₂ , etc.), and the operation method is simple and fast; The monitor reads pressure and piston displacement changes, which improves the monitoring accuracy.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the structural representation of the utility model.

In the figure: balance chamber 1, first valve 2, vacuum pump 3, top cover 4, first pipeline 5, pressure gauge 6, cylinder 7, bracket 8, displacement monitor 9, second valve 10, third valve 11, first Three pipelines 12 have a fourth valve 13 and a second pipeline 14 .

detailed description

As shown in Figure 1, the gas solubility measuring device at normal temperature and pressure comprises a balance chamber 1, and the upper end of the balance chamber 1 is connected with a vacuum pump 3 through a first pipeline 5, and a first valve 2 is installed on the first pipeline 5, and in the balance chamber 1 A top cover 4 is installed on the opening, and a pressure gauge 6 is installed in the center of the top cover 4. The bottom of the balance chamber 1 is connected to the cylinder 7 through a second pipeline 14, and a second valve 10 and a third valve 11 are installed on the second pipeline 14. , a third pipeline 12 communicates with the second pipeline 14 between the second valve 10 and the third valve 11, a fourth valve 13 is installed on the third pipeline 12, and a bracket 8 is fixedly connected to the outer wall of the cylinder 7, A displacement monitor 9 is installed on the bracket 8 , and the thimble of the displacement monitor 9 abuts against the piston rod of the cylinder 7 .

The method for using the gas solubility measuring device at normal temperature and pressure comprises the following steps:

a. To inject gas, first close the second valve 10, open the third valve 11 and the fourth valve 13, push the piston rod of the cylinder 7 to go down, and then fill the gas to be measured into the cylinder 7 from the third pipeline 12, when the gas to be tested After the gas is filled, close the third valve 11 and the fourth valve 13;

b. Measure the volume V of the solution, calculate the volume V of the balance chamber 1 occupied by the solution by measuring the mass m of the solution, then pour the solution into the balance chamber 1, and control the ratio of the volume of the solution to the volume of the balance chamber 1 to about 2/3 , and finally the top cover 4 is sealed and installed on the opening of the balance chamber 1;

c. Pumping and exhausting, open the first valve 2, and use the vacuum pump 3 to evacuate the balance chamber 1. After the pressure gauge 6 drops to the range of -90kpa to -100kpa, close the first valve 2, and wait for the value of the pressure gauge 6 to stabilize. Record the pressure value P ₁ ;

d, gas solubility measurement, reset the displacement monitor 9 to zero, and open the third valve 11 and the second valve 10 in turn, observe the movement of the push rod in the piston container, after the push rod moves stably, record the value of the displacement monitor 9 as L ₁ , pressure value P ₂ .

e. Calculate the amount solubility s of the substance:

In the formula: P _a represents the standard atmospheric pressure of 1.013×10 ⁵ Pa; P ₁ and P ₂ represent negative relative atmospheric pressure; R represents the ideal gas constant of 8.314J/mol·k; T represents the absolute temperature, T=Celsius+273.15; V ₁ represents the volume of the balance chamber 1;

Unit: k, T=20+273.15=293.15k in the normal temperature state in the utility model; M represents gas molar mass, unit: g/mol.

Claims (1)

1. normal temperature and pressure gas solubility determines device, it is characterised in that：Including balance cylinder（1）, balance cylinder（1）Upper end passes through One pipeline（5）With vavuum pump（3）Connection, in the first pipeline（5）On the first valve is installed（2）, in balance cylinder（1）Pacify in opening Equipped with top cover（4）, in top cover（4）Center is provided with pressure gauge（6）, balance cylinder（1）Bottom passes through second pipe（14）With cylinder （7）Connection, in second pipe（14）On the second valve is installed（10）With the 3rd valve（11）, in the second valve（10）With the 3rd Valve（11）Between second pipe（14）On be communicated with the 3rd pipeline（12）, in the 3rd pipeline（12）On the 4th valve is installed （13）, in cylinder（7）Support is fixedly connected with outer wall（8）, in support（8）Displacement monitors are installed（9）, displacement monitors （9）Thimble is resisted against cylinder（7）On piston rod.