System and method for rapid determination of gas solubility

Abstract

The invention relates to the technical field of chemical measurement, in particular to a system and method for rapidly measuring gas solubility, and the system comprises a liquid conveying unit and a gas conveying unit; the mixing unit is respectively connected with the liquid conveying unit and the gas conveying unit, and the liquid conveyed by the liquid conveying unit and the gas conveyed by the gas conveying unit are dissolved or reach a gas-liquid balance state by utilizing the mass transfer and heat transfer characteristics of the mixing unit; and the pressure difference measuring unit is used for measuring the pressure difference value of the system, analyzing the correlation between the pressure difference value and the gas conveying flow of the gas conveying unit, and determining the gas solubility under the target pressure and the target temperature according to the critical gas conveying flow with the changed correlation and the liquid conveying flow of the liquid conveying unit. Therefore, the problem that a static balance method is long in period is solved; the instrument analysis method is expensive in equipment and limited in effect; the microfluidic structure is complex, the measurement is easily influenced by factors such as viscosity, and the stability is poor.

Description

Technical Field

[0001] The present application relates to the field of chemical measurement technology, and in particular to a system and method for rapidly determining gas solubility. Background Art

[0002] The solubility of gases in liquids is a fundamental parameter in fields such as chemical engineering, energy, environment, and biomedicine, directly impacting engineering processes such as multiphase reaction design, separation process optimization, and environmental control. Currently, solubility determination relies primarily on three types of techniques: traditional static equilibrium methods, which acquire data through offline sampling and analysis after prolonged gas-liquid contact; instrumental analysis methods such as gas chromatography, mass spectrometry, and infrared spectroscopy offer high precision; and microfluidics, with its high specific surface area and rapid mass transfer characteristics, shows the potential to accelerate the determination process.

[0003] However, the static balance method has a long measurement cycle and a cumbersome process, making it difficult to meet the needs of real-time monitoring. Instrumental analysis methods are expensive, complex, and limited in application under extreme conditions. While microfluidics can improve measurement efficiency, the system structure is complex, requiring high pressure and corrosion resistance from the membrane material. Furthermore, the measurement is easily affected by factors such as fluid viscosity, and its stability and adaptability still need to be improved. Therefore, the relevant technologies still face problems such as long detection cycles, complex equipment, and poor applicability. Summary of the Invention

[0004] The present application provides a system and method for rapidly determining gas solubility to address the problems in related technologies such as the long measurement cycle and cumbersome operation of the static equilibrium method; the expensive equipment and complicated operation of the instrumental analysis method, which are limited under extreme working conditions; the complex microfluidic structure and high material requirements, the measurement being easily disturbed by factors such as viscosity, poor stability and insufficient adaptability.

[0005] The first aspect of the present application provides a system for quickly determining gas solubility, comprising: a liquid delivery unit and a gas delivery unit; a mixing unit, wherein the mixing unit is connected to the liquid delivery unit and the gas delivery unit, respectively, and utilizes the mass transfer and heat transfer characteristics of the mixing unit to dissolve the liquid delivered by the liquid delivery unit and the gas delivered by the gas delivery unit or reach a gas-liquid equilibrium state; a pressure difference measuring unit, used to measure the pressure difference of the system, analyze the correlation between the pressure difference and the gas delivery flow rate of the gas delivery unit, and determine the gas solubility at the target pressure and target temperature based on the critical gas delivery flow rate at which the correlation changes, and the liquid delivery flow rate of the liquid delivery unit.

[0006] Optionally, in one embodiment of the present application, the mixing unit is a microchannel mixer.

[0007] Optionally, in one embodiment of the present application, the mixing unit and the pressure difference measuring unit are both provided on a constant temperature device, and the temperature value of the constant temperature device is adjusted to a target temperature.

[0008] Optionally, in one embodiment of the present application, the temperature range adjusted by the thermostat is -78°C to 250°C.

[0009] Optionally, in one embodiment of the present application, a back pressure valve is installed downstream of the mixing unit, and the back pressure valve is used to adjust the pressure of the system to the target pressure.

[0010] Optionally, in one embodiment of the present application, the pressure range regulated by the back pressure valve is 0.01 to 20 MPa.

[0011] Optionally, in one embodiment of the present application, the liquid delivery unit is a horizontal flow pump or a syringe pump.

[0012] Optionally, in one embodiment of the present application, the gas delivery unit includes a gas source, a pressure reducing valve and a gas mass flow meter.

[0013] Optionally, in one embodiment of the present application, the differential pressure measuring unit is a differential pressure transmitter.

[0014] A second aspect of the present application provides a method for rapidly determining gas solubility, which is applied to a humidification system for rapidly determining gas solubility as in the above-mentioned embodiment, and includes the following steps: adjusting the back pressure valve to maintain the system pressure at the target pressure and the temperature of the thermostat to the target temperature; passing the liquid and gas through the liquid delivery unit and the gas delivery unit respectively, keeping the liquid delivery flow rate unchanged, and increasing the gas delivery flow rate with a preset gradient. At each gas delivery flow rate, after a preset time period and when the pressure differential measuring unit reading is stable, the flow rate is increased again; analyzing the correlation between the pressure differential measuring unit reading and the gas delivery flow rate, and determining the gas solubility at the target pressure machine target temperature based on the critical gas delivery flow rate at which the correlation changes, combined with the liquid delivery flow rate.

[0015] This application has the following beneficial effects:

[0016] The embodiment of the present application can ensure that the system operates under preset pressure and temperature conditions by adjusting the back pressure valve and the thermostat, and at the same time adopts a gas-liquid dual-channel independent delivery method to accurately control the constant flow rate of liquid and the staged gradient increase of gas flow rate. At each gas flow point, the system judges that the reading is stable through the pressure difference measurement unit before switching, so as to achieve real-time tracking of the dynamic process of gas-liquid mass transfer. By analyzing the correlation between gas flow and pressure difference changes, the critical flow point is determined, and then the gas solubility under different working conditions is efficiently and accurately calculated. The process is continuous, does not require complex structures or expensive equipment, and has significant advantages such as real-time measurement, high throughput, and applicability to a variety of temperature and pressure conditions. It solves the problems of the static balance method in related technologies, such as long measurement cycle and cumbersome operation; the instrumental analysis method is expensive, complicated to operate, and limited under extreme working conditions; the microfluidic structure is complex, the material requirements are high, the measurement is easily disturbed by factors such as viscosity, poor stability and insufficient adaptability.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a block diagram of a system for rapidly measuring gas solubility according to an embodiment of the present application;

[0020] Figure 2 This is a typical chart showing the change in the reading of the differential pressure sensor with the gas flow rate according to an embodiment of the present application;

[0021] Figure 3 is a typical chart of the mean pressure difference fitting according to an embodiment of the present application;

[0022] Figure 4 The figure is a flow chart of a method for rapidly determining gas solubility according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0024] The following describes, with reference to the accompanying drawings, a system and method for rapidly determining gas solubility according to an embodiment of the present application. To address the issues mentioned in the background art, the present application provides a system for rapidly determining gas solubility. This system ensures that the system operates within preset pressure and temperature conditions by adjusting a backpressure valve and a thermostat. It also utilizes a dual-channel, independent gas-liquid delivery method to precisely control the constant liquid flow rate and the phased, gradient-increased gas flow rate. At each gas flow point, the system switches to a pressure differential measurement unit after determining that the reading is stable, enabling real-time tracking of the dynamic process of gas-liquid mass transfer. By analyzing the correlation between gas flow and pressure differential changes, the critical flow point is determined, allowing efficient and accurate calculation of gas solubility under different operating conditions. The process is continuous, requiring no complex structure or expensive equipment, and offers significant advantages such as real-time measurement, high throughput, and applicability to a variety of temperature and pressure conditions. This addresses the problems of related technologies, such as the long measurement cycle and cumbersome operation of static equilibrium methods; the expensive equipment and complex operation of instrumental analysis methods, which are limited under extreme operating conditions; and the complex microfluidic structure and high material requirements, which make measurements susceptible to interference from factors such as viscosity, resulting in poor stability and insufficient adaptability.

[0025] Specifically, Figure 1 A block diagram of a system for rapidly determining gas solubility provided in an embodiment of the present application.

[0026] like Figure 1 As shown, the system 10 for rapidly determining gas solubility includes: a liquid delivery unit 100 , a gas delivery unit 200 , a mixing unit 300 and a differential pressure measurement unit 400 .

[0027] In the embodiment of the present application, the liquid delivery unit 100 is a horizontal flow pump or a syringe pump, which generally includes a pump, a pipeline and related control equipment, and is responsible for delivering liquid from one place to another.

[0028] Horizontal flow pumps are commonly used for liquid delivery. They deliver liquids through pipelines in a smooth flow pattern and are suitable for transporting high-viscosity or shear-sensitive liquids. Syringe pumps precisely control liquid flow and are often used in applications requiring high-precision liquid injection, such as pharmaceutical delivery or precise addition of liquids during chemical reactions.

[0029] As you can understand, a horizontal flow pump provides uniform flow and is suitable for applications requiring high precision. A syringe pump, on the other hand, precisely adjusts the amount of liquid injected and is suitable for applications requiring a high degree of control. Using either a horizontal flow pump or a syringe pump as a liquid delivery unit ensures stable and precise control of liquid flow, minimizing fluctuations or errors during the delivery process.

[0030] In the embodiment of the present application, the gas delivery unit 200 includes a gas source, a pressure reducing valve and a gas mass flow meter, and is responsible for delivering the gas from the storage source to the target location.

[0031] The gas source, commonly found in high-pressure gas cylinders and compressed air generators, provides the required gas and is the source of gas in the system. A pressure reducing valve reduces the pressure of the high-pressure source to the required operating pressure range for the equipment, ensuring safe and stable operation of subsequent units. A gas mass flowmeter measures the mass of gas passing through a cross-section per unit time.

[0032] It can be understood that the gas delivery unit 200 can achieve precise control and stable delivery of gas pressure and flow, ensure the stability of gas supply and reaction efficiency during the gas-liquid mixing process, and improve the system's operational reliability, mixing uniformity and experimental repeatability.

[0033] In an embodiment of the present application, the mixing unit 300 is connected to the liquid delivery unit 100 and the gas delivery unit 200, respectively. The mass transfer and heat transfer characteristics of the mixing unit 300 are utilized to dissolve the liquid delivered by the liquid delivery unit and the gas delivered by the gas delivery unit or reach a gas-liquid equilibrium state.

[0034] Gas-liquid equilibrium refers to the relatively stable state between gas and liquid at a certain temperature and pressure, where the concentration, pressure, and temperature of the substances in the two phases are in equilibrium. In this state, the evaporation and condensation rates of gas and liquid molecules are equal.

[0035] It can be understood that the mixing unit 300 promotes gas-liquid dissolution and gas-liquid equilibrium by optimizing mass transfer and heat transfer between liquid and gas, which not only improves reaction efficiency and system stability, reduces equipment wear, but also improves resource and energy utilization, making the system more efficient and stable.

[0036] In one embodiment of the present application, the mixing unit 300 is a microchannel mixer.

[0037] A microchannel mixer is a device that mixes fluids at the micrometer scale and is commonly used in high-precision chemical engineering, biomedicine, energy engineering, and other fields. Its structure typically consists of a series of micrometer-scale channels (typically 10–1000 micrometers wide). These channels, through a specific geometric design, guide two or more fluids through intense agitation and diffusion mixing within a very confined space.

[0038] As can be understood, the microchannel mixer's tiny channel dimensions and large specific surface area allow for full contact between gas and liquid within a very short path, significantly improving mass and heat transfer efficiency. Furthermore, the microchannel structure makes the device more compact, suitable for integrated and modular design, and facilitates large-scale industrial applications.

[0039] In one embodiment of the present application, a back pressure valve is installed downstream of the mixing unit 300, and the back pressure valve is used to adjust the pressure of the system to the target pressure.

[0040] A back pressure valve is a pressure control device used to maintain pressure within a piping system or container within a preset range. It automatically adjusts to the system pressure and releases excess pressure by activating a pressure relief function when the system pressure exceeds the set value, ensuring the system remains in a safe and stable operating state.

[0041] It can be understood that by regulating the pressure inside the system through the back pressure valve and keeping it at a set target value, the liquid and gas can maintain a stable flow in the pipeline, and at the same time, the gas and liquid can more fully exchange matter and heat when mixing, thereby improving the mixing efficiency and reaction consistency.

[0042] In one embodiment of the present application, the pressure range regulated by the back pressure valve is 0.01 to 20 MPa.

[0043] It is understandable that the pressure range covers the operating pressure required for conditions ranging from minimal backpressure (such as slight gas-liquid mixing and low-pressure dissolution) to high-pressure conditions (such as high-pressure gas dissolution and supercritical conditions), and is highly adaptable. For example, the low-end 0.01MPa is suitable for conventional gas-liquid mixing and low-pressure laboratory testing, while the high-end 20MPa is suitable for high-pressure reactions, high-pressure gas dissolution, or simulating supercritical conditions in industrial environments. This not only ensures the versatility and compatibility of the system, but also meets the precise pressure control and safety requirements under different needs, providing key support for achieving stable flow, effective mass transfer, and heat exchange.

[0044] In one embodiment of the present application, the differential pressure measuring unit 400 is a differential pressure transmitter.

[0045] The pressure difference measuring unit 400 is used to measure the pressure difference of the system 10, analyze the correlation between the pressure difference and the gas delivery flow of the gas delivery unit, and determine the gas solubility at the target pressure and target temperature based on the critical gas delivery flow at which the correlation changes, and the liquid delivery flow of the liquid delivery unit.

[0046] Among them, the differential pressure transmitter is used to measure the pressure difference between two points and convert it into an electrical signal output. It is widely used in flow, liquid level monitoring and other fields.

[0047] It is understandable that choosing a differential pressure transmitter as the differential pressure measurement unit can accurately measure the pressure difference, help monitor flow and liquid level changes in real time, and promptly detect system anomalies such as blockages or leaks, thereby reducing downtime, manual intervention, and operational errors.

[0048] In one embodiment of the present application, the mixing unit 300 and the pressure difference measuring unit 400 are both disposed on a constant temperature device, and the temperature value of the constant temperature device is adjusted to a target temperature.

[0049] In one embodiment of the present application, the temperature range adjusted by the thermostat is -78°C to 250°C.

[0050] As you can understand, low-temperature settings as low as -78°C can be used to control gas dissolution behavior at low temperatures or inhibit unwanted side reactions, making them suitable for low-temperature operations such as condensation and adsorption. High-temperature settings, however, as high as 250°C, support high-temperature applications involving heating, reaction, or accelerated mass transfer, making them suitable for thermally driven gas-liquid conversion processes. This wide temperature range enhances the system's versatility and experimental flexibility, ensuring precise control across a wide range of temperature conditions.

[0051] According to the system for rapid determination of gas solubility proposed in the embodiment of the present application, the system can ensure that the system operates under preset pressure and temperature conditions by adjusting the back pressure valve and the thermostat, and at the same time adopts a gas-liquid dual-channel independent delivery method to accurately control the constant flow rate of liquid and the staged gradient increase of gas flow rate. At each gas flow point, the system judges that the reading is stable through the pressure difference measurement unit before switching, so as to achieve real-time tracking of the dynamic process of gas-liquid mass transfer. By analyzing the correlation between gas flow and pressure difference changes, the critical flow point is determined, and then the gas solubility under different working conditions is efficiently and accurately calculated. The process is continuous, does not require complex structures or expensive equipment, and has significant advantages such as real-time measurement, high throughput, and applicability to a variety of temperature and pressure conditions. It solves the problems of long measurement cycle and cumbersome operation of the static balance method in related technologies; expensive equipment and complex operation of the instrumental analysis method, which is limited under extreme working conditions; complex microfluidic structure and high material requirements, and measurement is easily disturbed by factors such as viscosity, poor stability and insufficient adaptability.

[0052] Next, a method for rapidly determining gas solubility according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0053] Figure 4 1 is a flow chart of a method for rapidly determining gas solubility according to an embodiment of the present application.

[0054] like Figure 4 As shown, the method for rapidly determining gas solubility comprises the following steps:

[0055] In step S101, the back pressure valve is adjusted to maintain the system pressure at the target pressure and the temperature of the thermostat at the target temperature;

[0056] The system pressure is controlled by a back pressure valve, and the pressure range adjusted by the back pressure valve is 0.01~20MPa. The temperature is controlled according to the experimental conditions by water bath, oil bath, ultra-low temperature circulating bath or electric heating jacket, and the temperature range adjusted by the constant temperature device is -78℃~250℃.

[0057] In step S102, liquid and gas are passed through the liquid delivery unit and the gas delivery unit respectively, the liquid delivery flow rate is kept constant, and the gas delivery flow rate is increased at a preset gradient. At each gas delivery flow rate, after a preset time period or more and the pressure differential measurement unit reading is stable, the flow rate is increased again;

[0058] The specific settings of the preset gradient and preset duration should be adjusted according to the needs of the system. For example, the increment of the preset gradient can be selected in 1m 3 / h to 0.5m 3 / h, and the preset time length is usually between 30 seconds and 1 minute, with no specific limitation.

[0059] As you can understand, gradual incremental adjustments within a preset gradient help refine gas flow control, making flow adjustments smoother and more precise. This avoids sudden increases in flow that could cause excessive pressure fluctuations or excessive equipment load, helping the system achieve optimal operating conditions. By waiting for the differential pressure measurement unit's reading to stabilize before increasing flow, each change in gas flow aligns with the change in differential pressure, thereby optimizing pressure management. This approach provides more accurate real-time feedback and reduces the risk of errors or anomalies.

[0060] like Figure 2 The graph shows how the pressure differential changes over time as the gas flow rate gradually increases. The gas flow rate rises in steps at regular intervals, while the pressure differential remains relatively stable at low flow rates. As the flow rate increases, a clear upward trend appears after a certain point, indicating that the gas in the system is no longer fully soluble, resulting in an additional pressure differential. The gas flow rate corresponding to this trend change is the "critical flow rate" for determining gas solubility.

[0061] In step S103, the correlation between the reading of the differential pressure measurement unit and the gas delivery flow rate is analyzed, and the gas solubility at the target press target temperature is determined based on the critical gas delivery flow rate at which the correlation changes, combined with the liquid delivery flow rate.

[0062] like Figure 3 As shown in the figure, the trend at the critical point is clearly visible by fitting the differential pressure data after averaging. The system differential pressure rises linearly with increasing gas flow rate, but a significant deviation occurs at approximately 19-20 sccm, indicating that the gas begins to become insoluble within this range. This allows the critical gas flow rate to be determined and used to calculate solubility.

[0063] In summary, the embodiment of the present application adjusts the back pressure valve to keep the system pressure at the set value, adjusts the temperature of the thermostat to the set value; inputs the liquid and gas into the system at a stable flow rate through the liquid delivery unit and the gas delivery unit respectively; keeps the liquid delivery flow rate unchanged, increases the gas delivery flow rate gradually from 0, waits for a certain stabilization time at each gas delivery flow rate until the pressure difference measurement unit reading is stable, and then increases the flow rate; analyzes the correlation between the pressure difference measurement unit reading and the gas delivery flow rate, and determines the gas solubility at the set pressure and temperature based on the critical gas delivery flow rate at which the correlation changes, combined with the liquid delivery flow rate. The final experimental results show that the method for determining the solubility of gas in liquid has a temperature range of -78℃ to 250℃ and a pressure range of 0.01 to 20MPa; the stabilization time is 10s to 5min.

[0064] It should be noted that the aforementioned explanation of the embodiment of the system for rapidly measuring gas solubility is also applicable to the method for rapidly measuring gas solubility in this embodiment, and will not be repeated here.

[0065] According to the method for rapid determination of gas solubility proposed in the embodiment of the present application, by adjusting the back pressure valve and the thermostat, it is ensured that the system operates under preset pressure and temperature conditions, and at the same time, a gas-liquid dual-channel independent delivery method is adopted to accurately control the constant flow rate of liquid and the staged gradient increase of gas flow rate. At each gas flow point, the system judges that the reading is stable through the pressure difference measurement unit before switching, so as to achieve real-time tracking of the dynamic process of gas-liquid mass transfer. By analyzing the correlation between gas flow and pressure difference changes, the critical flow point is determined, and then the gas solubility under different working conditions is efficiently and accurately calculated. The process is continuous, does not require complex structures or expensive equipment, and has significant advantages such as real-time measurement, high throughput, and applicability to a variety of temperature and pressure conditions. It solves the problems of long measurement cycle and cumbersome operation of the static balance method in related technologies; expensive equipment and complex operation of the instrumental analysis method, which is limited under extreme working conditions; complex microfluidic structure and high material requirements, and measurement is easily disturbed by factors such as viscosity, poor stability and insufficient adaptability.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0068] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing a custom logical function or process step, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed in a different order than shown or discussed, including performing functions in a substantially simultaneous manner or in a reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0069] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0070] A person skilled in the art may understand that all or part of the steps carried out in the method for implementing the above-mentioned embodiment may be completed by instructing the relevant hardware through a program, and the above-mentioned program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A system for rapidly measuring gas solubility, characterized in that: include: Liquid delivery unit and gas delivery unit; A mixing unit, wherein the mixing unit is connected to the liquid delivery unit and the gas delivery unit respectively, and utilizes the mass transfer and heat transfer characteristics of the mixing unit to dissolve or reach a gas-liquid equilibrium state between the liquid delivered by the liquid delivery unit and the gas delivered by the gas delivery unit; A differential pressure measuring unit is used to measure the pressure difference of the system, analyze the correlation between the pressure difference and the gas delivery flow rate of the gas delivery unit, and determine the gas solubility at the target pressure and target temperature based on the critical gas delivery flow rate at which the correlation changes and the liquid delivery flow rate of the liquid delivery unit.

2. The system for rapid determination of gas solubility according to claim 1, characterized in that: The mixing unit is a microchannel mixer.

3. The system for rapid determination of gas solubility according to claim 1, characterized in that: The mixing unit and the pressure difference measuring unit are both arranged on a constant temperature device, and the temperature of the constant temperature device is adjusted to the target temperature.

4. The system for rapid determination of gas solubility according to claim 3, characterized in that: The temperature range adjusted by the thermostat is -78°C to 250°C.

5. The system for rapid determination of gas solubility according to claim 1, characterized in that: A back pressure valve is installed downstream of the mixing unit, and the pressure of the system is adjusted to the target pressure by using the back pressure valve.

6. The system for rapid determination of gas solubility according to claim 5, characterized in that: The pressure range regulated by the back pressure valve is 0.01-20 MPa.

7. The system for rapid determination of gas solubility according to claim 1, characterized in that: The liquid delivery unit is a horizontal flow pump or a syringe pump.

8. The system for rapid determination of gas solubility according to claim 1, characterized in that: The gas delivery unit includes a gas source, a pressure reducing valve and a gas mass flow meter.

9. The system for rapid determination of gas solubility according to claim 1, characterized in that: The differential pressure measuring unit is a differential pressure transmitter.

10. A method for rapidly determining gas solubility, characterized in that: The method utilizes the system for rapidly determining gas solubility according to any one of claims 1 to 9, wherein the method comprises the following steps: Adjust the back pressure valve to keep the system pressure at the target pressure and the temperature of the thermostat at the target temperature; Pass the liquid and gas through the liquid delivery unit and the gas delivery unit respectively, keep the liquid delivery flow rate unchanged, and increase the gas delivery flow rate at a preset gradient. At each gas delivery flow rate, wait for a preset time or longer and for the pressure difference measurement unit reading to stabilize before increasing the flow rate; The correlation between the differential pressure measurement unit reading and the gas delivery flow rate is analyzed. Based on the critical gas delivery flow rate at which the correlation changes, the gas solubility at the target press target temperature is determined in combination with the liquid delivery flow rate.

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