Gas solubility measuring device

Abstract

The utility model discloses a gas solubility measuring device which comprises a gas storage tank, a first circulating tank, a second circulating tank, an output pipe, a return pipe, a gas taking and weighing device, a circulating pump, a first thermometer, a pressure gauge and a heater, the output end of the first circulating tank is communicated with the input end of the second circulating tank through an output pipe, the output end of the second circulating tank is communicated with the first circulating tank through a return pipe, the output end of the second circulating tank is further communicated with a gas taking and weighing device, and a circulating pump is arranged on the output pipe; a first thermometer, a pressure gauge and a heater are arranged on the second circulating tank. The device has the advantages that the solubility of different gases in the same solution can be tested; the solubility of the same gas in solutions with different pressures and temperatures can be tested; and different solutions are supplemented into the second circulating tank through the liquid supplementing port to test the solubility of the same gas in different solutions.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas solubility measurement technical field, specifically relate to a gas solubility measuring device. BACKGROUND

[0002] The solubility of gas is an important property of gas, and the solubility of gas is usually represented by volume. Under normal conditions, the solubility of different gases in the same solution is very different, the solubility of the same gas in different solutions is also very different, and the solubility of the same gas in the same solution but at different temperatures and pressures is also different.

[0003] At present, there is an urgent need for a device that can measure the solubility of different gases in the same solution, the solubility of the same gas in different solutions, and the solubility of the same gas in the same solution but at different temperatures and pressures. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a device that can measure the solubility of different gases in the same solution, the solubility of the same gas in different solutions, and the solubility of the same gas in the same solution but at different temperatures and pressures.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A gas solubility measuring device, comprising a gas storage tank, a first circulating tank, a second circulating tank, an output pipe, a reflux pipe, a gas taking and weighing device, a circulating pump, a first thermometer, a pressure gauge, and a heater, the output end of the gas storage tank is in communication with the input end of the first circulating tank, the output end of the first circulating tank is in communication with the input end of the second circulating tank through the output pipe, the output end of the second circulating tank is in communication with the first circulating tank through the reflux pipe, the output end of the second circulating tank is also in communication with the gas taking and weighing device, the circulating pump is arranged on the output pipe, and the first thermometer, the pressure gauge, and the heater are arranged on the second circulating tank.

[0007] The second circulating tank is provided with a liquid supplementing port, the output end of the reflux pipe is divided into two, namely a first reflux branch pipe and a second reflux branch pipe, the first reflux branch pipe and the second reflux branch pipe are both in communication with the first circulating tank, and the first reflux branch pipe and the second reflux branch pipe are respectively provided with a first reflux valve and a second reflux valve.

[0008] Different gases can be stored in the gas storage tank, so that the solubility of different gases in the same solution can be tested; the pressure and temperature in the second circulating tank are controllable, so that the solubility of the same gas in solutions with different pressures and temperatures can be tested; different solutions can be added into the second circulating tank through the liquid supplementing port, so that the solubility of the same gas in different solutions can be tested; in addition, the gas drainage weighing device is used to test the solubility of the gas in the solution by using the gas drainage and water drainage weighing method.

[0009] Preferably, the gas drainage weighing device comprises a gas drainage pipe, a gas-liquid separation tank, a dryer, a water drainage tank and a measuring cup, the gas-liquid separation tank is communicated with the second circulating tank through the gas drainage pipe, the output end of the gas-liquid separation tank is sequentially provided with the dryer and the water drainage tank, and the output end of the water drainage tank is provided towards the cup opening of the measuring cup.

[0010] Preferably, the gas drainage pipe is provided with a gas drainage valve.

[0011] Preferably, the output end of the dryer is further provided with a second thermometer.

[0012] Preferably, the water drainage tank is provided with a liquid level meter.

[0013] Preferably, the height of the second reflux branch pipe is lower than the height of the first reflux branch pipe and higher than the height of the second circulating tank.

[0014] Preferably, the output end of the gas storage tank is sequentially provided with a pressure reducing valve, a first valve and a one-way valve in the gas flow direction.

[0015] Preferably, the first circulating tank is respectively provided with an exhaust port and a first liquid discharge port.

[0016] Preferably, the output pipe is provided with a second valve.

[0017] Preferably, the second circulating tank is respectively provided with a second liquid discharge port.

[0018] Compared with the prior art, the device has the following beneficial effects:

[0019] Different gases can be stored in the gas storage tank, so that the solubility of different gases in the same solution can be tested; the pressure and temperature in the second circulating tank are controllable, so that the solubility of the same gas in solutions with different pressures and temperatures can be tested; different solutions can be added into the second circulating tank through the liquid supplementing port, so that the solubility of the same gas in different solutions can be tested; in addition, the gas drainage weighing device is used to test the solubility of the gas in the solution by using the gas drainage and water drainage weighing method. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a structural schematic diagram of the device. DETAILED DESCRIPTION

[0021] In order for those skilled in the art to understand the technical scheme of the utility model, the technical scheme of the utility model will be further described in conjunction with the drawings of the specification.

[0022] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, and can also be communication; can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In the present application, unless specifically defined and limited otherwise, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless specifically defined and limited.

[0024] Referring to Figure 1 The embodiment discloses a gas solubility measuring device, which comprises a gas storage tank 1, a first circulating tank 2, a second circulating tank 3, an output pipe 4, a reflux pipe 5, a gas taking and weighing device 6, a circulating pump 7, a first thermometer 8, a pressure gauge 9 and a heater 10. The output end of the gas storage tank 1 is communicated with the input end of the first circulating tank 2. The output end of the first circulating tank 2 is communicated with the input end of the second circulating tank 3 through the output pipe 4. The output end of the second circulating tank 3 is communicated with the first circulating tank 2 through the reflux pipe 5. The output end of the second circulating tank 3 is also communicated with the gas taking and weighing device 6. The circulating pump 7 is arranged on the output pipe 4. The first thermometer 8, the pressure gauge 9 and the heater 10 are arranged on the second circulating tank 3.

[0025] The output end of the gas storage tank 1 is sequentially provided with a pressure reducing valve 11, a first valve 12 and a one-way valve 13 in the gas flow direction. The gas storage tank 1 serves as a gas supply device for different gases. The pressure reducing valve 11 is used to reduce the pressure of the gas output by the gas storage tank 1 to the required pressure, so as to meet the solubility characteristics of the gas under different pressures. The first valve 12 is used to open and close the gas into the first circulating tank 2. The one-way valve 13 is used to block the liquid reflux in the first circulating tank 2.

[0026] The top and bottom of the first circulating tank 2 are respectively provided with an exhaust port 201 and a first liquid discharge port 202.

[0027] The second circulating tank 3 is respectively provided with a second liquid outlet 301 and a liquid supplementing port 302.

[0028] The output pipe 4 is provided with a second valve 14.

[0029] The output end of the reflux pipe 5 is bifurcated into a first reflux branch pipe 501 and a second reflux branch pipe 502, both of which are in communication with the first circulating tank 2, and the first reflux branch pipe 501 and the second reflux branch pipe 502 are respectively provided with a first reflux valve 503 and a second reflux valve 504; wherein the height of the second reflux branch pipe 502 is lower than that of the first reflux branch pipe 501 and higher than that of the second circulating tank 3, and there is a certain height difference between the first circulating tank 2 and the second circulating tank 3, so as to ensure that the second circulating tank 3 is full of liquid when the liquid supplementing height of the first circulating tank 2 is between the first reflux branch pipe 501 and the second reflux branch pipe 502.

[0030] Specifically, the circulating liquid enters the first circulating tank 2 from the high inlet of the first reflux branch pipe 501, and since it is from the gas cavity to the liquid cavity, it is easier to bring the gas into the liquid, and the circulating pump 7 is opened to quickly and fully dissolve the gas into the liquid. The pressure gauge 9 has a group of pressure values after the gas supply, and the pressure gradually decreases when the gas is dissolved into the liquid, and when the pressure value decreases to a stable pressure value, it indicates that the gas is fully dissolved. After full dissolution, open the second reflux valve 504 and close the first reflux valve 503, so that the circulating liquid enters the first circulating tank 2 from the second reflux branch pipe 502, i.e. the circulating liquid circulates from the second reflux branch pipe 502, reducing the entry of bubbles from the gas into the liquid.

[0031] The gas taking and weighing device 6 comprises a gas taking pipe 601, a gas-liquid separation tank 602, a dryer 603, a drain tank 604, a measuring cup 605, a gas taking valve 606, a second thermometer 607, and a liquid level meter 608. The gas-liquid separation tank 602 is in communication with the second circulating tank 3 through the gas taking pipe 601, and specifically, the gas taking pipe 601 is in communication with the reflux pipe 5. The output end of the gas-liquid separation tank 602 is sequentially provided with the dryer 603 and the drain tank 604. The output end of the drain tank 604 is arranged towards the cup opening of the measuring cup 605. The gas taking pipe 601 is provided with the gas taking valve 606. The output end of the dryer 603 is further provided with the second thermometer 607. The drain tank is provided with the liquid level meter 608.

[0032] Specifically, by opening the gas extraction valve 606, the gas and a small amount of liquid in the second circulating tank 3 are extracted when the pressure in the tank is released. The gas-liquid separation tank 602 is used for gas-liquid separation, the drying tank 603 is used for drying the separated gas, and the dried gas is discharged into the drainage tank 604. The second thermometer 607 is used to monitor the temperature of the dried gas, and the liquid level meter 608 is used to monitor the liquid level in the drainage tank 607. The measuring cup 605 is used to hold the liquid discharged from the drainage tank 604 and to weigh it, and then the solubility of the gas in the solution is tested by the gas extraction and drainage weighing method.

[0033] For example, the solubility of hydrogen in 30% caustic lye at a test temperature of 90°C and a pressure of 3MPa is tested:

[0034] Close the first valve 12 and the gas extraction valve 606, open the second valve 14, the first backflow valve 503, the second backflow valve 504, and the exhaust port 201. Add 30% caustic lye to the second circulating tank 3 and the first circulating tank 2 through the liquid supplement port 302. Turn on the circulating pump 7 during the liquid supplement to ensure that the circulating pump 7 and the pipeline connected to the circulating tank are filled with caustic lye. Stop supplementing when the second circulating tank 3 is full and the first circulating tank 2 is filled to the middle position between the first backflow branch pipe 501 and the second backflow branch pipe 502. Then close the exhaust port 201.

[0035] Then close the second backflow valve 504, turn on the circulating pump 7, and use the heater 10 to raise the temperature of the caustic lye to 90°C. The first thermometer 8 serves as the control and monitoring point for the temperature of the caustic lye. When the temperature of the caustic lye reaches 90°C, open the first valve 12 to inject high-pressure hydrogen into the first circulating tank 2 through the pressure reducing valve 11, reducing the pressure to about 3MPa. Record the pressure values of the pressure sensor P1 at this time. Close the first valve 12 and observe the change in pressure value. When the pressure value decreases to a stable value, it indicates that the hydrogen has been fully dissolved in the caustic lye. Then open the first valve 12 to continuously supply hydrogen, and then open the second backflow valve 504 and close the first backflow valve 503 to circulate the caustic lye from the second backflow branch pipe 502. After a period of circulation, close the circulating pump 7 and let it stand for a period of time (4-8 hours) to allow the gas bubbles in the caustic lye to float up. These gas bubbles are not dissolved gas bubbles.

[0036] At this time, slowly open the gas extraction valve 606 to see if there is liquid flowing out of the transparent pipeline at the back end of the gas extraction valve 606. If there are gas bubbles in the horizontal pipeline at the front end of the gas extraction valve 606 that have not floated out, close the gas extraction valve 606. Then open the circulating pump 7 at a low flow rate for 1 minute to remove any gas bubbles at the top of the second circulating tank 3. At this time, close the first manual valve 303 at the output end of the second circulating tank 2, the second manual valve 304 at the input end, and the third manual valve 305 on the liquid supplement port 302. Record the values of the first thermometer 8 and the pressure gauge 9 at this time.

[0037] Gas drainage weighing: open the output end hand valve of the drainage tank 604, slowly open the gas valve 606 to release the pressure of the second circulating tank 3, and the dissolved gas is precipitated through the gas valve 606 to the gas-liquid separation tank 602. This process requires slowly opening the gas valve 606 to prevent a large amount of lye from being precipitated with the gas and filling the gas-liquid separation tank 602 with lye. The precipitated gas passes through the gas-liquid separation tank 602 to the drying tank 603 and then to the drainage tank 604. The gas enters the drainage tank 604, which pressurizes the liquid in the drainage tank 604 to the measuring cup 605. During this process, the height of the output end hand valve of the drainage tank 604 needs to be kept consistent with the liquid level in the liquid level gauge 608 to avoid obtaining more water due to the height of the hand valve being lower than the liquid level of the liquid level gauge 608, and obtaining less water due to the height of the hand valve being higher than the liquid level of the liquid level gauge 608. In addition, the temperature of the second thermometer 607 during this process needs to be recorded.

[0038] Hydrogen solubility calculation formula:

[0039] Q1 = g2 - g1

[0040]

[0041] g1: weight of measuring cup 605 g

[0042] g2: total weight of measuring cup 605 and water g

[0043] Q1: gas volume ml

[0044] T: temperature value of second thermometer 607

[0045] Q: standard condition gas volume ml

[0046] L: volume of second circulating tank 3 L

[0047] P: pressure value of pressure gauge 9 kpa

[0048] S: dissolved gas volume per unit pressure ml / L*atm

[0049] In summary, by using the gas storage tank 1 to store different gases in this embodiment, the solubility of different gases in the same solution can be tested. The pressure and temperature in the second circulating tank 3 are controllable, so the solubility of the same gas in different pressure and temperature solutions can be tested. Different solutions can be added to the second circulating tank 3 through the liquid supplementing port 302 to test the solubility of the same gas in different solutions. In addition, the gas solubility in the solution can be tested by using the gas drainage weighing method of the gas taking weighing device 6.

[0050] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments but can be implemented in other embodiments without deviating from the spirit or essential characteristics of the application. Therefore, the embodiments should be seen as exemplary in nature and are non-limiting, the scope of the application being defined by the appended claims and not by the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, no reference signs in the claims being regarded as limiting the claim concerned.

[0051] The above-described embodiments only represent the implementation of the present application, and the protection scope of the present application is not limited to the above-described embodiments. For those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A gas solubility measurement device, characterized by: The gas storage tank, the first circulating tank, the second circulating tank, the output pipe, the return pipe, the gas taking and weighing device, the circulating pump, the first thermometer, the pressure gauge and the heater are sequentially arranged along the gas flow direction. The second circulating tank is provided with a liquid supplementing port.

2. The apparatus of claim 1, wherein: The output end of the return pipe is divided into two, i.e. the first return branch pipe and the second return branch pipe.

3. The apparatus of claim 2, wherein: The gas taking and weighing device comprises a gas taking pipe, a gas-liquid separation tank, a dryer, a drainage tank and a measuring cup.

4. The apparatus of claim 2, wherein: The gas taking pipe is provided with a gas taking valve.

5. The apparatus of claim 2, wherein: The output end of the dryer is further provided with a second thermometer.

6. The apparatus of claim 1, wherein: The drainage tank is provided with a liquid level meter.

7. The apparatus of claim 1, wherein: The height of the second return branch pipe is lower than that of the first return branch pipe and higher than that of the second circulating tank.

8. The apparatus of claim 1, wherein: The output end of the gas storage tank is sequentially provided with a pressure reducing valve, a first valve and a one-way valve along the gas flow direction.

9. The apparatus of claim 1, wherein: The first circulating tank is respectively provided with a gas outlet and a first liquid outlet.

10. The apparatus of claim 1, wherein: The output pipe is provided with a second valve. The second circulating tank is respectively provided with a second liquid outlet.

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