A device for measuring the gas loading in a liquid phase on-line

Abstract

The utility model provides an online measure device of gas load in liquid phase belongs to analytical measurement technical field, this online measure device of gas load in liquid phase includes: including the gas detection module of sealed reaction container and parameter detection element, including the precision sampling module of piston type sampler, reaction liquid unit and central processing module. Through adopting precision sampling module, cooperation central processing module to the logic program control of gas detection module, precision sampling module and reaction liquid unit, have realized the automation precision sampling, and have realized the online continuous measurement of gas load.

Description

Technical Field

[0001] This utility model relates to the field of analytical measurement technology, and in particular to a device for online measurement of gas load in a liquid phase. Background Technology

[0002] Gas separation in chemical, medical, and environmental fields involves a large number of sample tests and analyses. These tests often involve numerous chemical reactions that generate gases. Rapid and accurate measurement of the gas load released during sample testing is crucial for technological development, real-time monitoring of industrial processes, and improvement of industrial production efficiency. Particularly in carbon capture technology, the CO2 loading of chemical absorbents is a critical indicator. The CO2 loading of liquid-phase CO2 absorbents (such as amine solutions like MEA) directly affects carbon capture efficiency.

[0003] In existing testing methods, gas loading is typically measured manually, based on the principle of communicating vessels, by measuring the volume of gas produced during the reaction. The amount of gas released is then calculated from the gas volume, thus determining the gas loading in the liquid phase. However, human operation is prone to errors, resulting in poor reproducibility of measurement results, and online monitoring is not possible. Utility Model Content

[0004] In view of the above-mentioned problems in existing gas load testing, this utility model proposes an online device for measuring gas load in liquid phase that overcomes or at least partially solves the above-mentioned problems.

[0005] One objective of this invention is to solve the problems of traditional devices being unable to perform continuous online measurements and having poor accuracy through automated precision sampling.

[0006] A further objective of this invention is to achieve high-precision sample introduction.

[0007] Another further objective of this invention is to optimize the structure of the reaction device to further improve measurement stability and accuracy.

[0008] Specifically, this invention provides an online device for measuring the gas loading in a liquid phase, comprising:

[0009] The gas detection module includes:

[0010] A sealed reaction vessel having a sealed internal cavity and a sample inlet; and

[0011] The parameter detection element is set up so that its detection part is connected to the internal cavity of the sealed reaction vessel, and is used to measure the gas load to calculate the required parameter values ​​inside the sealed reaction vessel.

[0012] A precision sampling module includes a piston injector having a sampling interface and an injection port connected to an injection port. The piston injector is configured to acquire an input liquid sample through the sampling interface and to inject a first set amount of liquid sample into a reaction vessel through the injection interface and the injection port by moving its piston a set distance under controlled drive.

[0013] The reaction liquid unit has a reaction liquid outlet connected to the internal cavity of a sealed reaction vessel, used to inject a second predetermined amount of reaction liquid into the internal cavity of the sealed reaction vessel, so that the liquid sample reacts with the reaction liquid to release gas; and

[0014] The central processing module is communicatively connected to the gas detection module, the precision sampling module, and the reaction liquid unit, and is configured to control the gas detection module, the precision sampling module, and the reaction liquid unit to operate according to a set timing sequence, acquire the parameter values ​​measured by the parameter detection element, and calculate the gas load of the liquid sample based on the parameter values.

[0015] Optionally, the precision sampling module has a sampling port and also includes a sampling pump, wherein the inlet of the sampling pump is connected to the sampling port, the outlet of the sampling pump is connected to the sampling interface of the piston injector, and the sampling pump is configured to extract liquid phase sample through the sampling port and pump the liquid phase sample into the piston injector through the sampling interface and fill the piston injector.

[0016] Optionally, the piston injector includes a hollow cylindrical injection housing and a piston. The sampling port and the injection port are respectively located on the side and one end of the injection housing. The injection housing also has a piston inlet located at the other end opposite to the injection port. The piston includes a piston disc and a piston rod fixedly connected to the piston disc. The piston disc is inserted into the inner cavity of the injection housing from the piston inlet and moves within the inner cavity by the piston rod.

[0017] Optionally, the precision sampling module also includes:

[0018] The slide is connected to the piston rod; and

[0019] A limiter, located in the direction of piston rod movement, is used to limit the stop position when the piston rod moves away from the injection housing;

[0020] The central processing module includes: a first control unit, which is communicatively connected to the slide table and configured to drive the slide table to move the piston rod in response to detection commands.

[0021] Optionally, the precision sampling module also has a discharge port and a discharge pump; the injection housing also has a discharge interface on the side; the inlet of the discharge pump is connected to the discharge interface and the outlet is connected to the discharge port, and the discharge pump is used to extract liquid phase samples from the inner cavity of the injection housing and discharge them through the discharge port.

[0022] The sampling interface and the discharge interface are arranged sequentially from the end where the injection interface is located to the other end where the piston inlet is located.

[0023] The central processing module also includes:

[0024] The second control unit is communicatively connected to the injection pump and the discharge pump, respectively, and is configured to control the operation of the injection pump and the discharge pump.

[0025] Optionally, each of the injection port, sampling port, and discharge port has a neck formed between itself and the inner cavity of the injection housing;

[0026] The device for online measurement of gas loading in liquid phase also includes:

[0027] The filtration unit, located between the sampling port and the injection pump, is used to filter the extracted liquid sample.

[0028] Optionally, the reaction liquid unit includes a reaction liquid container, an inlet pump, and a outlet pump, wherein,

[0029] The inlet and outlet of the liquid inlet pump are connected to the inside of the reaction liquid container and the internal cavity of the sealed reaction container, respectively. The liquid inlet pump is used to pump a second set amount of reaction liquid from the reaction liquid container into the internal cavity of the sealed reaction container.

[0030] The inlet and outlet of the discharge pump are connected to the internal cavity of the sealed reaction vessel and the interior of the reaction liquid container, respectively. The discharge pump is used to discharge the solution in the internal cavity of the sealed reaction vessel into the reaction liquid container.

[0031] Both the inlet pump and the outlet pump are communicatively connected to the second control unit to operate under its control.

[0032] Optionally, the device for online measurement of gas loading in the liquid phase further includes:

[0033] A sealing valve, communicating with the internal cavity of the sealed reaction vessel and connected in communication with a second control unit, is used to operate under the control of the second control unit to seal or deseal the sealed reaction vessel; and / or

[0034] The stirring element is communicatively connected to the second control unit and is used to operate under the control of the second control unit to stir and mix the solution in the sealed reaction vessel.

[0035] Optionally, the parameter detection element includes a temperature detection element and a pressure detection element, used to measure the temperature and pressure values ​​inside the closed reaction vessel, respectively;

[0036] The central processing module includes a central processing unit, which is communicatively connected to the temperature detection element and the pressure detection element, respectively. It is configured to acquire the temperature and pressure values ​​measured by the temperature and pressure detection elements, and calculate the gas load of the liquid sample based on the temperature and pressure values.

[0037] Optionally, the sealed reaction vessel includes a reaction vessel body and a protrusion that protrudes upward from the top surface of the reaction vessel body to form a columnar space inside the sealed reaction vessel.

[0038] The pressure sensing element is configured such that its sensing part is connected to the columnar space inside the sealed reaction vessel.

[0039] Optionally, the horizontal cross-section of the protrusion and the horizontal cross-section of the reaction vessel body are circular, and the diameter of the horizontal cross-section of the protrusion is greater than or equal to 3 mm and less than or equal to 1 / 3 of the diameter of the horizontal cross-section of the reaction vessel body; and / or

[0040] The ratio of the height of the protrusion to the height of the main body of the reaction vessel is 0.1 to 1.

[0041] Optionally, the device for online measurement of gas loading in the liquid phase further includes:

[0042] The communication and display module is connected to the central processing module and is used to display the parameter values ​​and / or calculation results acquired by the central processing module; and

[0043] The switch signal transmitting module is connected to the central processing module.

[0044] The communication and display module or the switch signal sending module sends a detection command to the central processing module to trigger the central processing module.

[0045] This invention provides an online device for measuring gas loading in a liquid phase. It employs a precision sampling module, coupled with a central processing module to control the logic program of the gas detection module, precision sampling module, and reaction liquid unit, achieving automated precision sampling and continuous online measurement of gas loading. Specifically, the piston-type injector overcomes the problems of unstable injection volume and large errors in general pumping methods (e.g., peristaltic pumps) for small-volume quantitative measurements. It can accurately and stably inject small volumes, further improving the accuracy of liquid-phase gas loading detection, while maintaining low overall cost. Simultaneously, the closed reaction vessel avoids interference from ambient gases, and the degradation products (such as heat-stable salts) do not participate in acid-base reactions, thus not affecting the detection results and improving measurement accuracy; the absolute error can be less than 1.5%. Automated sampling solves the problems of errors easily caused by human operation and poor reproducibility of measurement results, achieving high-stability measurement with a repeatability error of less than 0.5%. The entire device can operate continuously without manual intervention, except for input commands, achieving low maintenance.

[0046] Furthermore, in the device for online measurement of gas load in liquid phase of this utility model, a precision sampling module is formed by combining a sample injection pump and a piston injector. First, the sample injection pump pumps the liquid phase sample into and fills the piston injector. Then, the piston of the piston injector is controlled to move a set distance to inject a set amount of liquid phase sample from the piston injector into the reaction vessel to realize the automated injection of liquid phase sample, thereby achieving stable and high-precision injection.

[0047] Furthermore, in the device for online measurement of gas load in liquid phase of this invention, the top region of the sealed reaction vessel is extended by setting a protrusion at the top of the sealed reaction vessel, and the pressure detection element is set in the protrusion, which can prevent liquid from splashing onto the pressure detection element during the reaction process (especially the stirring process), thereby further improving the measurement stability and accuracy.

[0048] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below.

[0049] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0051] Figure 1 This is a schematic structural block diagram of an online device for measuring gas loading in a liquid phase according to an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the external appearance of an online device for measuring the gas load in a liquid phase according to an embodiment of the present invention;

[0053] Figure 3 This is a schematic diagram of a device for online measurement of gas loading in a liquid phase according to an embodiment of the present invention;

[0054] Figure 4a This is a front structural schematic diagram of the piston sampler of an online device for measuring gas loading in a liquid phase according to an embodiment of the present invention;

[0055] Figure 4b yes Figure 4a A top view schematic diagram of the piston-type sampler shown;

[0056] Figure 4c yes Figure 4a The diagram shows a left-side view of the piston-type sampler. Detailed Implementation

[0057] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0058] To solve the above technical problems, this utility model provides a device 100 for online measurement of gas load in liquid phase.

[0059] Figure 1 This is a schematic structural block diagram of an online device 100 for measuring gas load in a liquid phase according to an embodiment of the present invention, wherein solid arrows indicate material flow and dashed arrows indicate signal flow. Figure 2 This is a schematic diagram of the external appearance of an online device 100 for measuring the gas load in a liquid phase according to an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of an online device 100 for measuring the gas load in a liquid phase according to an embodiment of the present invention. The following is in conjunction with... Figures 1 to 3 This invention describes the structure of the device 100 for online measurement of gas load in a liquid phase.

[0060] See Figures 1 to 3 As shown, the device 100 for online measurement of gas load in liquid phase generally includes a central processing module 110, a gas detection module 120, a precision sampling module 130, and a reaction liquid unit 140.

[0061] The gas detection module 120 includes a sealed reaction vessel 12 and parameter detection elements.

[0062] The closed reaction vessel 12 can be an internally controlled closed shell with a closed internal cavity and a sample inlet 16.

[0063] The parameter detection element is configured such that its detection part is connected to the internal cavity of the sealed reaction vessel 12, and is used to measure the gas load to calculate the required parameter values ​​inside the sealed reaction vessel 12.

[0064] The precision sampling module 130 includes a piston-type injector 7. The piston-type injector 7 has a sampling interface 73 and an injection interface 71 communicating with an injection port 16. The piston-type injector 7 is configured to acquire an input liquid sample through the sampling interface 73 and, through its piston, move a predetermined distance under controlled drive to inject a first predetermined amount of liquid sample into the reaction vessel 12 via the injection interface 71 and the injection port 16. The injection interface 71 and the injection port 16 can be connected by a conduit.

[0065] The reaction liquid output port of the reaction liquid unit 140 is connected to the internal cavity of the sealed reaction container 12, and is used to inject a second set amount of reaction liquid into the internal cavity of the sealed reaction container 12 so that the liquid sample reacts with the reaction liquid to release gas.

[0066] The central processing module 110 is communicatively connected to the gas detection module 120, the precision sampling module 130, and the reaction liquid unit 140, respectively. It is configured to control the gas detection module 120, the precision sampling module 130, and the reaction liquid unit 140 to operate according to a set timing sequence, and to acquire the parameter values ​​measured by the parameter detection element and calculate the gas load of the liquid sample based on the parameter values.

[0067] The device 100 for online measurement of gas load in a liquid phase provided in this embodiment employs a precision sampling module 130, which, in conjunction with a central processing module 110, controls the logic program of the gas detection module 120, the precision sampling module 130, and the reaction liquid unit 140. This achieves automated precision sampling and continuous online measurement of gas load. The closed reaction vessel 12 prevents interference from ambient gases, and the degradation products (such as thermally stable salts) do not participate in the acid-base reaction, thus not affecting the detection results and improving measurement accuracy; the absolute error can be less than 1.5%. Automated sampling solves the problem of errors easily caused by human operation and poor reproducibility of measurement results, achieving highly stable measurement with a repeatability error of less than 0.5%. The entire device can operate continuously without manual intervention, except for input commands, achieving low maintenance.

[0068] In some embodiments, the parameter detection elements may include a temperature detection element 29 and a pressure detection element 30. The temperature detection element 29 and the pressure detection element 30 are arranged such that their detection sites are in communication with the internal cavity of the sealed reaction vessel 12, and are used to measure the temperature and pressure values ​​inside the sealed reaction vessel 12, respectively.

[0069] The central processing module 110 includes a central processing unit 25. The central processing unit 25 is communicatively connected to the temperature sensing element 29 and the pressure sensing element 30, respectively, and is configured to acquire the temperature and pressure values ​​measured by the temperature sensing element 29 and the pressure sensing element 30, and calculate the gas load of the liquid sample based on the temperature and pressure values.

[0070] In some embodiments, the temperature sensing element 29 may be a temperature sensor.

[0071] In one specific embodiment, a first interface 17 can be opened on the top or side wall of the sealed reaction vessel 12, and the temperature sensor can be sealed and installed at the first interface 17.

[0072] In some embodiments, the pressure sensing element 30 may be a pressure sensor.

[0073] In one specific embodiment, a second interface 18 may be provided on the top or side wall of the sealed reaction vessel 12, and the second interface 18 is connected to a pressure sensor via a pipe.

[0074] In some embodiments, the precision sampling module 130 has a sampling port 1 and also includes a sample injection pump 9. The inlet of the sample injection pump 9 is connected to the sampling port 1, for example, via a pipe, and the outlet of the sample injection pump 9 is connected to the sampling interface 73 of the piston injector 7, for example, via a pipe. The sample injection pump 9 is configured to draw a liquid sample through the sampling port 1 and pump the liquid sample through the sampling interface 73 to fill the piston injector 7.

[0075] In some embodiments, the injection pump 9 may be a peristaltic pump.

[0076] In this embodiment, a precision sampling module 130 is formed by combining a sample injection pump 9 with a piston injector 7. First, the sample injection pump 9 pumps the liquid sample into and fills the piston injector 7. Then, the piston of the piston injector 7 is controlled to move a set distance to inject a set amount of liquid sample from the piston injector 7 into the reaction vessel 12 to achieve automated liquid sample injection, thereby achieving stable and high-precision injection.

[0077] Traditional peristaltic pump injection methods, due to the presence of pulses, suffer from unstable injection volumes and significant errors when performing small quantitative doses (e.g., 0.1–1 mL). In contrast, the combination of the injection pump 9 and the piston-type precision injector 7 in this embodiment eliminates pulses, enabling accurate and stable quantitative injection of small volumes, further improving the accuracy of liquid-phase gas loading detection. Moreover, it offers lower overall cost compared to high-precision plunger pumps.

[0078] Figure 4a This is a front view of the piston-type sampler 7 of an online device 100 for measuring gas loading in a liquid phase according to an embodiment of the present invention. Figure 4b yes Figure 4a A top view of the piston-type sampler 7 shown; Figure 4c yes Figure 4a The diagram shows the left-side view of the piston-type sampler 7.

[0079] like Figures 4a to 4c As shown, the piston-type injector 7 may include a hollow cylindrical injection housing 70 and a piston 8. A sampling port 73 and an injection port 71 are respectively located on the side and one end of the injection housing 70. The injection housing 70 also has a piston inlet 74 located at the other end opposite to the injection port 71. The piston 8 includes a piston disc and a piston rod fixedly connected to the piston disc. The piston disc is inserted into the inner cavity of the injection housing 70 through the piston inlet 74 and moved within the inner cavity of the injection housing 70 by the piston rod. Those skilled in the art will understand that the periphery of the piston disc is fluid-tightly fitted with the inner peripheral wall of the injection housing 70, thereby preventing liquid leakage.

[0080] In some further embodiments, the precision sampling module 130 may also include a slide 5 and a limiter 6. The slide 5 is connected to the piston rod. The limiter 6 is located in the direction of movement of the piston rod and is used to limit the termination position of the piston rod when it moves away from the injection housing 70.

[0081] The central processing module 110 may also include a first control unit 4. The first control unit 4 is communicatively connected to the slide 5 and is configured to drive the slide 5 to move the piston rod in response to a detection command, thereby causing the piston rod to move the piston disc within the cavity of the injection housing 70.

[0082] In some embodiments, the precision sampling module 130 further includes a discharge port 2 and may also include a discharge pump 10. The injection housing 70 also has a discharge interface 72 disposed on its side. The inlet of the discharge pump 10 is connected to the discharge interface 72, for example, via a pipe, and the outlet is connected to the discharge port 2, for example, via a pipe. The discharge pump 10 is used to draw liquid phase samples from the inner cavity of the injection housing 70 and discharge them through the discharge port 2.

[0083] In some embodiments, the sampling interface 73 and the discharge interface 72 are arranged sequentially from one end where the sample inlet interface 71 is located to the other end where the piston inlet 74 is located.

[0084] In practical applications, the injection housing 70 can be vertically positioned with the injection port 71 facing downwards. This allows the piston disc and piston rod to move vertically.

[0085] In some embodiments, the central processing module 110 may further include a second control unit 11, which is communicatively connected to the injection pump 9 and the discharge pump 10, respectively, and configured to control the operation of the injection pump 9 and the discharge pump 10. The second control unit 11 may be triggered based on a received instruction or may be triggered in other ways.

[0086] In one specific embodiment, the second control unit 11 can be triggered by the piston rod being moved by the slide table 5 to the limit switch 6 and stopped.

[0087] In some embodiments, each of the injection port 71, the sampling port 73, and the discharge port 72 has a neck formed between it and the inner cavity of the injection housing 70.

[0088] By forming a constriction between each interface and the inner cavity of the injection housing 70, the accuracy of liquid (especially micro-liquid) delivery can be improved, and liquid residue and waste can be reduced.

[0089] In some embodiments, the apparatus 100 may further include a filtration unit 27. The filtration unit 27 is disposed between the sampling port 1 and the sample pump 9 for filtering the extracted liquid phase sample to remove particulate matter.

[0090] The filter unit 27 can be a single-stage or multi-stage filter unit, and the filtration accuracy can be above 5μm.

[0091] As mentioned above, the reaction liquid output port of the reaction liquid unit 140 is connected to the internal cavity of the sealed reaction container 12, and is used to inject a second set amount of reaction liquid into the internal cavity of the sealed reaction container 12 so that the liquid sample reacts with the reaction liquid to release gas.

[0092] In some specific embodiments, a fourth interface 20 may be provided on the top or side wall of the sealed reaction vessel 12. The reaction liquid output port of the reaction liquid unit 140 can be connected to a pipe. By extending the pipe through the fourth interface 20 into the internal cavity of the sealed reaction vessel 12, the reaction liquid output port of the reaction liquid unit 140 is connected to the internal cavity of the sealed reaction vessel 12. In one specific embodiment, the fourth interface 20 is provided on the top wall of the sealed reaction vessel 12.

[0093] In some embodiments, the reaction liquid unit 140 may include a reaction liquid container 24, an inlet pump 22, and an outlet pump 23.

[0094] The inlet and outlet of the feed pump 22 are connected to the interior of the reaction liquid container 24 and the interior cavity of the sealed reaction container 12, respectively. The feed pump 22 is used to pump a second set amount of reaction liquid from the reaction liquid container 24 into the interior cavity of the sealed reaction container 12. At this time, the outlet of the feed pump 22 serves as the reaction liquid output port of the reaction liquid unit 140.

[0095] Specifically, the inlet connection pipe of the liquid inlet pump 22 extends into the reaction liquid container 24 and is immersed in the reaction liquid.

[0096] The inlet and outlet of the discharge pump 23 are connected to the internal cavity of the sealed reaction vessel 12 and the interior of the reaction liquid container 24, respectively. The discharge pump 23 is used to discharge the solution in the internal cavity of the sealed reaction vessel 12 into the reaction liquid container 24.

[0097] In some embodiments, a drain port 15 may be provided at the bottom of the sealed reaction vessel 12, and the inlet of the drain pump 23 is connected to the drain port 15 via a pipe. The outlet of the drain pump 23 is connected to a pipe, and the outlet of the drain pump 23 is connected to the interior of the reaction vessel 24 by extending the end of the pipe connected to the outlet into the reaction liquid container 24.

[0098] In one specific embodiment, the bottom of the sealed reaction vessel 12 can be formed in the shape of a funnel, and the drain port 15 is located at the lowest point in the center of the bottom of the funnel shape, so as to ensure that the solution in the sealed reaction vessel 12 can be completely drained.

[0099] In some specific embodiments, the inlet pump 22 and / or the outlet pump 23 may be peristaltic pumps.

[0100] In some embodiments, both the inlet pump 22 and the outlet pump 23 are communicatively connected to the second control unit 11 to operate under the control of the second control unit 11.

[0101] In some embodiments, the apparatus 100 for detecting the liquid phase gas load may further include a sealing valve 21. The sealing valve 21 is in communication with the internal cavity of the sealed reaction vessel 12 and is connected to the second control unit 11, and is used to operate under the control of the second control unit 11 to seal or deseal the sealed reaction vessel 12.

[0102] In one specific embodiment, a third interface 19 may be opened on the top wall or side wall of the sealed reaction vessel 12, and the sealing valve 21 is connected to the third interface 19 through a pipe to communicate with the internal cavity of the sealed reaction vessel 12.

[0103] In some specific embodiments, the sealing valve 21 may be a solenoid valve.

[0104] Furthermore, the sealing valve 21 can be either a normally open or normally closed solenoid valve. When a normally open solenoid valve is used, it seals the reaction vessel 12 when controlled to open and unseals it when controlled to close. When a normally closed solenoid valve is used, it unseals the reaction vessel 12 when controlled to open and seals it when controlled to close.

[0105] In some embodiments, the apparatus 100 for detecting the liquid phase gas load may further include a stirring element 13. The stirring element 13 is disposed at the sealed reaction vessel 12 and is communicatively connected to the second control unit 11, and is used to operate under the control of the second control unit 11 to stir and mix the solution in the sealed reaction vessel 12.

[0106] The stirring element 13 can be a magnetic stirrer, a mechanical stirrer, or an oscillating stirrer (such as an ultrasonic transducer).

[0107] In some specific embodiments, the stirring element 13 is a magnetic stirrer, including a magnetic stirrer body 131 disposed at the bottom of the sealed reaction container 12 and a magnetic element 132 placed inside the sealed reaction container 12.

[0108] In some embodiments, the gas detection module 120, the reaction liquid unit 140, and the sealing valve 21 constitute a reaction system 200.

[0109] In some embodiments, the sealed reaction vessel 12 may include a reaction vessel body 121 and a protrusion 122 that protrudes upward from the top surface of the reaction vessel body 121 to form a cylindrical space inside the sealed reaction vessel 12. A pressure sensing element 30 is provided such that its sensing portion communicates with the cylindrical space inside the sealed reaction vessel 12. That is, a second interface 18 is provided on the protrusion 122.

[0110] The protrusion 122 can be located at any position on the top of the sealed reaction vessel 12. Preferably, the protrusion 122 is located at the center of the top of the sealed reaction vessel 12.

[0111] In this embodiment, the top region of the sealed reaction vessel 12 is extended by providing a protrusion 122 at the top. Furthermore, the pressure sensing element 30 is positioned on the protrusion 122, preventing liquid from splashing onto the pressure sensing element 30 during the reaction process (especially the stirring process), thus further improving measurement stability and accuracy. In particular, compared to using baffles (partitions) in the reaction vessel 12 to prevent liquid splashing, which essentially divides the reaction vessel 12 into upper and lower regions, the presence of baffles exacerbates the pressure generated within the sealed cavity during stirring, leading to significant errors. In contrast, the present invention extends the top region of the sealed reaction vessel 12 to prevent liquid splashing, avoiding increased errors.

[0112] In some embodiments, the horizontal cross-section of the protrusion 122 and the horizontal cross-section of the reaction vessel body 121 are both circular. The diameter of the horizontal cross-section of the protrusion 122 is greater than or equal to 3 mm and less than or equal to 1 / 3 of the diameter of the horizontal cross-section of the reaction vessel body 121. By optimizing the ratio of the horizontal cross-sectional area of ​​the protrusion 122 to the horizontal cross-sectional area of ​​the reaction vessel body 121, it is possible to effectively prevent liquid splashing while ensuring uniform gas pressure balance within the reaction vessel 12.

[0113] In some embodiments, the ratio of the height of the protrusion 122 to the height of the reaction vessel body 121 is 0.1 to 1, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.0. By optimizing the ratio of the height of the protrusion 122 to the height of the reaction vessel body 121, the overall height of the reaction vessel 12 can be reduced as much as possible while ensuring the effect of preventing liquid splashing, thereby reducing the size of the entire device 100.

[0114] In some embodiments, the apparatus 100 for online measurement of gas load in the liquid phase may further include a temperature control unit 150 for temperature control of the entire apparatus 100, particularly the gas detection module 120. The temperature control unit 150 may be, for example, an electric heater (heating) and / or an air conditioner (cooling and heating).

[0115] In some embodiments, the apparatus 100 for online measurement of gas loading in a liquid phase may further include a calibration unit 160. When it is necessary to calibrate the gas loading measurement using a standard liquid sample, the calibration unit 160 can be used to provide a standard liquid sample to the precision sampling module 130 to perform the corresponding calibration operation.

[0116] In some embodiments, the solution (mainly composed of reaction liquid) after reaction in the gas detection module 120 can be discharged into the reaction liquid unit 140 for collection and recycling. When the cumulative test amount of released gas (i.e., the cumulative amount of released gas detected) reaches the replacement condition, the reaction liquid in the reaction liquid unit 140 is discharged as waste liquid and replaced with fresh reaction liquid for detection.

[0117] In some embodiments, the apparatus 100 for online measurement of gas load in a liquid phase may further include a sample circulation module 191. Excess liquid phase sample in the precision sampling module 130 can be discharged to the sample circulation module 191 for recycling.

[0118] In some embodiments, the solution after the reaction during the calibration operation can also be discharged into the reaction liquid unit 140 as calibration waste liquid and eventually disposed of.

[0119] In some embodiments, the apparatus 100 for online measurement of gas load in liquid phase may further include a power supply unit 180 for supplying power to the electrical components in the apparatus 100.

[0120] In some embodiments, the apparatus 100 for online measurement of gas load in the liquid phase may further include a central control system 190. After calculating the gas load, the central processing module 110 can transmit the calculated gas load and / or acquired data (such as temperature and pressure) to the central control system 190 for display via analog / communication signals. The central control system 190 can also be used to input commands from external sources, such as detection commands.

[0121] The gas detection module 120, precision sampling module 130, temperature control unit 150, sample circulation module 191, reaction liquid unit 140, power supply unit 180 and central control system 190 can all be connected to the central processing module 110 for control and automatic operation according to the set timing and logic.

[0122] In some embodiments, the apparatus 100 for online measurement of gas load in liquid phase may further include a communication and display module 26, which is communicatively connected to the central processing module 110 and is used to display data (such as temperature and pressure values) and / or calculation results (i.e., gas load) acquired by the central processing module 110.

[0123] Specifically, the communication and display module 26 is communicatively connected to the central processing unit 25. The central processing unit 25 sends the acquired data and / or calculation results to the communication and display module 26 for display.

[0124] The communication and display module 26 may be at least a part of the central control system 190.

[0125] In some embodiments, the apparatus 100 for online measurement of gas load in the liquid phase may further include a switch signal transmitting module 3, which is communicatively connected to the central processing module 110. The switch signal transmitting module 3 may include, for example, a switch button.

[0126] Specifically, the switch signal transmitting module 3 can be communicatively connected to the first control unit 4.

[0127] The switch signal sending module 3 can also be part of the central control system 190.

[0128] In actual operation, the communication and display module 26 or the switch signal sending module 3 can send a detection command to the central processing module 110 (specifically the first control unit 4 and the central processing unit 25) to trigger the central processing module 110.

[0129] In some embodiments, the liquid sample is an absorption solution containing a CO2 absorbent as an active ingredient. The CO2 absorbent may be an organic amine, such as monoethanolamine (MEA). The released gas is CO2.

[0130] The reaction solution is an acid that can react with the CO2 absorbent, such as hydrochloric acid, sulfuric acid, nitric acid, etc., with sulfuric acid being preferred.

[0131] The communication connection mentioned in this article can be a wired connection (such as a connection via a wire) or a wireless connection.

[0132] The structure of the online gas loading device 100 for measuring the gas loading in a liquid phase according to this utility model has been described above. The operation process of the online gas loading device 100 for measuring the gas loading in a liquid phase through a specific embodiment will be further explained below.

[0133] In one specific embodiment, all hardware units in the online gas load measurement device 100 are controlled by the central processing module 110. When a detection command is received, the central processing module 110 issues instructions, all hardware operates according to logic, and simultaneously collects data signals during the test process for calculation and processing to obtain the gas load and transmit it to the central control system 190.

[0134] In this embodiment, the liquid sample is a CO2 absorption solution containing organic amines as the active ingredient, and the reaction solution is an acid solution.

[0135] In actual operation, the switch signal sending module 3 or the communication and display module 26 sends a detection command to the first control unit 4. Upon receiving the detection command, the first control unit 4 drives the slide 5 to move the piston 8 of the piston-type sampler 7 upwards, stopping at the limit switch 6, and simultaneously triggers the second control unit 11. The second control unit 11 controls the injection pump 9 and the discharge pump 10 to operate for a set time, allowing the liquid sample to fill the inner cavity of the injection housing 70 of the piston-type sampler 7. Then, the first control unit 4 drives the slide 5 to move the piston 8 of the piston-type sampler 7 downwards to a position between the discharge port 72 and the sampling port 73, thereby injecting a certain amount of liquid sample into the sealed reaction vessel 12. Then, the inlet pump 22 and the stirring element 13 start operating for a period of time. After the inlet pump 22 and the stirring element 13 stop, the discharge pump 23 starts operating to discharge the solution from the sealed reaction vessel 12, thus completing the cleaning of the gas detection module 120. After the discharge pump 23 stops, the inlet pump 22 restarts for a certain period of time to inject a second set amount of reaction liquid into the sealed reaction vessel 12. Then, the stirring element 13 continues to operate, and the sealing valve 21 also continues to operate to maintain the sealed reaction vessel 12 in a sealed state. Next, the slide 5 moves the piston 8 downwards a fixed distance to inject a first set amount of liquid sample into the sealed reaction vessel 12, causing the liquid sample to react with the reaction liquid and release CO2. The central processing unit 25 collects data from the temperature sensor 29 and the pressure sensor 30 in real time, performs calculations to determine the gas load, and transmits the gas load to the communication and display module 26 for display. After the measurement is completed, the discharge pump 23 starts operating to discharge the solution from the sealed reaction vessel 12, the stirring element 13 and the sealing valve 21 close, and simultaneously, the slide 5 moves the piston 8 upwards to below the limiter 6.

[0136] Table 1 below lists the results of multiple measurements of the same organic amine sample using the online gas loading measurement device 100 of this invention.

[0137] Table 1

[0138]

[0139] The pressures before and after the reaction in the table above are gauge pressures.

[0140] The device 100 for online measurement of gas load in liquid phase proposed in this utility model achieves automated and precise sampling through the combination of a sample pump and a piston sampler. Simultaneously, it integrates a central processing module to realize automation technology and program algorithms, achieving fully automatic measurement and completely eliminating human error. This utility model achieves high-precision, low-maintenance gas load monitoring, solving the problems of traditional titration methods, such as inability to operate online, low accuracy, and poor repeatability.

[0141] The device 100 for online measurement of gas loading in liquid phase proposed in this utility model has the following technical advantages:

[0142] (1) High precision: absolute error <1.5%.

[0143] (2) Anti-interference: The closed reaction avoids interference from environmental gases, and the degradation products (such as heat-stable salts) do not participate in acid-base reactions and do not affect the detection results.

[0144] (3) High stability: repeatability error is less than 0.5%.

[0145] (4) Low maintenance: It can run continuously without human intervention, except for input commands.

[0146] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0147] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A device for online measurement of gas loading in a liquid phase, characterized in that, include: The gas detection module includes: A sealed reaction vessel having a sealed internal cavity and a sample inlet; and The parameter detection element is configured such that its detection part is connected to the internal cavity of the sealed reaction vessel, and is used to measure the gas load to calculate the parameter values ​​inside the sealed reaction vessel required for calculation. A precision sampling module includes a piston-type injector having a sampling interface and an injection port connected to the injection port. The piston-type injector is configured to acquire an input liquid sample through the sampling interface and to inject a first set amount of liquid sample into the reaction vessel through the injection interface and the injection port by moving its piston a set distance under controlled drive. A reaction liquid unit, whose reaction liquid outlet is connected to the internal cavity of the sealed reaction vessel, is used to inject a second predetermined amount of reaction liquid into the internal cavity of the sealed reaction vessel, so that the liquid sample reacts with the reaction liquid to release gas; and The central processing module is communicatively connected to the gas detection module, the precision sampling module, and the reaction liquid unit, and is configured to control the gas detection module, the precision sampling module, and the reaction liquid unit to operate according to a set timing sequence, acquire the parameter values ​​measured by the parameter detection element, and calculate the gas load of the liquid sample based on the parameter values.

2. The apparatus for online measurement of gas loading in a liquid phase according to claim 1, characterized in that, The precision sampling module has a sampling port and also includes a sampling pump, wherein the inlet of the sampling pump is connected to the sampling port, and the outlet of the sampling pump is connected to the sampling interface of the piston injector. The sampling pump is configured to extract a liquid sample through the sampling port and pump the liquid sample into the piston injector via the sampling interface and fill the piston injector.

3. The apparatus for online measurement of gas loading in a liquid phase according to claim 2, characterized in that, The piston-type injector includes a hollow cylindrical injection housing and a piston. The sampling interface and the injection interface are respectively located on the side and one end of the injection housing. The injection housing also has a piston inlet located at the other end opposite to the injection interface. The piston includes a piston disc and a piston rod fixedly connected to the piston disc. The piston disc is inserted into the inner cavity of the injection housing from the piston inlet and is moved within the inner cavity by the piston rod.

4. The apparatus for online measurement of gas loading in a liquid phase according to claim 3, characterized in that, The precision sampling module also includes: The slide table is connected to the piston rod; and A limiter, located in the direction of movement of the piston rod, is used to limit the termination position of the piston rod when it moves away from the injection housing; The central processing module includes: a first control unit, which is communicatively connected to the slide table and configured to drive the slide table to move the piston rod in response to a detection command.

5. The apparatus for online measurement of gas loading in a liquid phase according to claim 4, characterized in that, The precision sampling module also has a discharge port and a discharge pump; the injection housing also has a discharge interface on the side; the inlet of the discharge pump is connected to the discharge interface, and the outlet is connected to the discharge port. The discharge pump is used to extract liquid phase samples from the inner cavity of the injection housing and discharge them through the discharge port. The sampling interface and the discharge interface are arranged sequentially from one end where the injection interface is located to the other end where the piston inlet is located. The central processing module also includes: The second control unit is communicatively connected to the injection pump and the discharge pump, respectively, and is configured to control the operation of the injection pump and the discharge pump.

6. The apparatus for online measurement of gas loading in a liquid phase according to claim 5, characterized in that, Each of the injection port, the sampling port, and the discharge port has a neck formed between it and the inner cavity of the injection housing; The device for online measurement of gas loading in liquid phase further includes: A filtration unit is disposed between the sampling port and the injection pump for filtering the extracted liquid phase sample.

7. The apparatus for online measurement of gas loading in a liquid phase according to claim 5, characterized in that, The reaction liquid unit includes a reaction liquid container, an inlet pump, and a outlet pump, wherein, The inlet and outlet of the liquid inlet pump are respectively connected to the interior of the reaction liquid container and the internal cavity of the sealed reaction container. The liquid inlet pump is used to pump the second set amount of reaction liquid from the reaction liquid container into the internal cavity of the sealed reaction container. The inlet and outlet of the discharge pump are respectively connected to the internal cavity of the sealed reaction vessel and the interior of the reaction liquid container. The discharge pump is used to discharge the solution in the internal cavity of the sealed reaction vessel into the reaction liquid container. Both the inlet pump and the outlet pump are communicatively connected to the second control unit to operate under the control of the second control unit.

8. The apparatus for online measurement of gas loading in a liquid phase according to claim 7, characterized in that, Also includes: A sealing valve, communicating with the internal cavity of the sealed reaction vessel and connected in communication with the second control unit, is used to operate under the control of the second control unit to seal or deseal the sealed reaction vessel; and / or The stirring element is communicatively connected to the second control unit and is used to operate under the control of the second control unit to stir and mix the solution in the sealed reaction vessel.

9. The apparatus for online measurement of gas loading in a liquid phase according to claim 1, characterized in that, The parameter detection element includes a temperature detection element and a pressure detection element, which are used to measure the temperature and pressure values ​​inside the sealed reaction vessel, respectively. The central processing module includes a central processing unit, which is communicatively connected to the temperature detection element and the pressure detection element, respectively, and is configured to acquire the temperature and pressure values ​​measured by the temperature detection element and the pressure detection element, and calculate the gas load of the liquid sample based on the temperature and pressure values.

10. The apparatus for online measurement of gas loading in a liquid phase according to claim 9, characterized in that, The sealed reaction vessel includes a reaction vessel body and a protrusion that protrudes upward from the top surface of the reaction vessel body to form a columnar space inside the sealed reaction vessel. The pressure sensing element is configured such that its sensing part is connected to the columnar space inside the sealed reaction vessel.

11. The apparatus for online measurement of gas loading in a liquid phase according to claim 10, characterized in that, The horizontal cross-section of the protrusion and the horizontal cross-section of the reaction vessel body are circular. The diameter of the horizontal cross-section of the protrusion is greater than or equal to 3 mm and less than or equal to 1 / 3 of the diameter of the horizontal cross-section of the reaction vessel body; and / or The ratio of the height of the protrusion to the height of the main body of the reaction vessel is 0.1 to 1.

12. The apparatus for online measurement of gas loading in a liquid phase according to claim 1, characterized in that, Also includes: A communication and display module is communicatively connected to the central processing module and is used to display the parameter values ​​and / or calculation results acquired by the central processing module; as well as A switch signal transmitting module is communicatively connected to the central processing module; Specifically, the communication and display module or the switch signal sending module sends a detection command to the central processing module to trigger the central processing module.

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