Blended gas testing method, system, device and equipment
By introducing carbon dioxide and hydrogen into the pipeline and sampling and analyzing them, the problems of uneven gas mixing and stratification were solved, thus improving the safety of pipeline transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PIPECHINA SOUTH CHINA CO
- Filing Date
- 2026-02-24
- Publication Date
- 2026-05-08
AI Technical Summary
When gases with different physical properties, such as carbon dioxide and hydrogen, are mixed in pipelines, uneven local concentration distribution and gas stratification can easily occur, affecting the safety of pipeline transmission.
By introducing a first gas and a second gas into the test pipeline, sampling is performed using a gas sampling device, and the results are analyzed using a testing device to obtain the mixing uniformity and stratification of the mixed gases, providing data support to improve transportation safety.
It enables the detection of gas mixing uniformity and stratification at different pipeline lengths, improving the safety of pipeline transportation of mixed gases.
Smart Images
Figure CN121995009A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipeline transportation technology, and in particular to a method, system, apparatus and equipment for testing mixed gases. Background Technology
[0002] In pipeline gas transport, at least two gases are often mixed in some scenarios. For example, the mixed transport of carbon dioxide and hydrogen can significantly reduce the energy consumption and cost of transporting them separately.
[0003] In related technologies, carbon dioxide and hydrogen are directly mixed and transported in pipelines. However, due to the significant differences in the physical properties of carbon dioxide and hydrogen, uneven local concentration distribution and gas stratification can easily occur when they are mixed and transported in the same pipeline, thus affecting the safety of transporting the carbon dioxide and hydrogen mixture in pipelines. Summary of the Invention
[0004] The purpose of this application is to provide a method, system, apparatus, and equipment for testing mixed gases, which can obtain the mixing uniformity and stratification of the first and second gases at different pipeline lengths when transporting mixed gases through pipelines, thereby providing data support for mixed gas transportation processes and pipe material selection and protection, and thus improving the safety of pipeline transportation of mixed gases.
[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a method for testing mixed gases. This method is applied to a mixed gas testing system, which includes: a first inlet, a second inlet, a test pipeline, at least two gas sampling devices, and a testing device. The first and second inlets are respectively connected to the test pipeline, and the at least two gas sampling devices are respectively located at different points along the pipeline length and are respectively connected to the testing device. The method includes: A first gas is introduced into the test pipeline through a first inlet, and a second gas is introduced into the test pipeline through a second inlet. The first and second gases are gases with different physical properties. A gas sampling device samples the mixed gas in the test pipeline, obtaining a sampled gas, which includes both the first and second gases. The sampled gas is analyzed by a testing device to obtain a mixed gas test result, which indicates the mixing effect of the first and second gases.
[0006] The technical solution provided in this application involves inputting a first gas and a second gas into a test pipeline, then sampling the mixed gas in the test pipeline to obtain sampled gas, and finally analyzing the sampled gas to obtain mixed gas test results. This allows for the determination of the mixing uniformity and stratification of the first gas and the second gas at different pipeline lengths when they are mixed and transported in the same test pipeline. This provides data support for mixed gas transport processes and pipe material selection and protection, thereby improving the safety of pipeline transport of mixed gases.
[0007] In some embodiments, the gas mixing test method further includes: adjusting the pipeline pressure value, the first gas flow rate value, and the second gas flow rate value of the test pipeline, wherein the pipeline pressure value indicates the pressure when the gas is mixed in the test pipeline, the first gas flow rate value indicates the input rate of the first gas, and the second gas flow rate value indicates the input rate of the second gas. Specifically, the method involves inputting the first gas into the test pipeline through a first inlet and the second gas into the test pipeline through a second inlet. This can be further implemented by: inputting the first gas into the test pipeline with the pipeline pressure value through the first inlet at the first gas flow rate value; and inputting the second gas into the test pipeline with the pipeline pressure value through the second inlet at the second gas flow rate value.
[0008] In some embodiments, the analysis of the sampled gas using a testing device to obtain the mixed gas test results can be specifically implemented as follows: The sampled gas is analyzed using the testing device to obtain the actual mixing ratio and stratification state of the sampled gas, wherein the stratification state indicates the vertical distribution of the first gas and the second gas in the test pipeline. The actual mixing ratio is compared with a preset mixing ratio to obtain the mixing ratio difference of the sampled gas. Based on the mixing ratio difference and the stratification state, the mixed gas test results are obtained.
[0009] In some embodiments, the actual mixing ratio of the sampled gas is obtained by analyzing the sampled gas using a testing device. This can be specifically achieved by: analyzing the gas concentration of the sampled gas using a testing device to obtain a first concentration value of the first gas and a second concentration value of the second gas; and obtaining the actual mixing ratio based on the first and second concentration values.
[0010] In some embodiments, the gas mixing test method provided in this application further includes: purging the test pipeline at least once through a first air inlet and / or a second air inlet before introducing the first gas and the second gas into the test pipeline. By purging the test pipeline at least once before introducing the first gas and the second gas into the test pipeline, residual gas or impurities in the test pipeline are removed, avoiding interference from residual impurities in the next gas mixing test.
[0011] In some embodiments, the mixed gas testing system provided in this application further includes a venting device, which includes a venting valve, a venting riser, and a venting riser support. The venting valve is connected to the test pipeline and the venting riser, and the venting riser support is connected to the venting riser. The mixed gas testing method provided in this application further includes: after obtaining the mixed gas test results, venting the mixed gas in the test pipeline through the venting device.
[0012] In some embodiments, the first gas is carbon dioxide and the second gas is hydrogen.
[0013] Secondly, a mixed gas testing system is provided, the system comprising: a first air inlet, a second air inlet, a test pipeline, at least two gas sampling devices and a testing device, wherein the first air inlet and the second air inlet are respectively connected to the test pipeline, the at least two gas sampling devices are respectively disposed at different positions along the length of the pipeline, and the at least two gas sampling devices are respectively connected to the testing device.
[0014] The first air inlet is used to input the first gas into the test pipeline, and the second air inlet is used to input the second gas into the test pipeline, wherein the first gas and the second gas are gases with different physical properties.
[0015] The aforementioned gas sampling device is used to sample the mixed gas in the test pipeline to obtain the sampled gas.
[0016] The aforementioned testing device is used to analyze the sampled gas and obtain the mixed gas test results, which are used to indicate the mixing effect of the first gas and the second gas.
[0017] In some embodiments, the above-described mixed gas testing system further includes an adjustment device. The adjustment device is used to adjust the pipeline pressure value of the test pipeline, the first gas flow rate value of the first gas, and the second gas flow rate value of the second gas, wherein the pipeline pressure value indicates the pressure when mixed gases are present in the test pipeline, the first gas flow rate value indicates the input rate of the first gas, and the second gas flow rate value indicates the input rate of the second gas. A first inlet is used to input the first gas into the test pipeline having the pipeline pressure value at the first gas flow rate value. A second inlet is used to input the second gas into the test pipeline having the pipeline pressure value at the second gas flow rate value.
[0018] In some embodiments, the testing apparatus is used to analyze the sampled gas to obtain the actual mixing ratio and stratification state of the sampled gas. The stratification state is used to indicate the vertical distribution of the first gas and the second gas in the test pipeline. The actual mixing ratio is compared with a preset mixing ratio to obtain the mixing ratio difference of the sampled gas. Based on the mixing ratio difference and the stratification state, the mixed gas test result is obtained.
[0019] In some embodiments, the testing apparatus is used to perform gas concentration analysis on the sampled gas to obtain a first concentration value of a first gas and a second concentration value of a second gas. Based on the first and second concentration values, the actual mixing ratio is obtained.
[0020] In some embodiments, the first air inlet and / or the second air inlet are also used to purge the test pipeline at least once before introducing the first gas and the second gas into the test pipeline.
[0021] In some embodiments, the above-described mixed gas testing system further includes a venting device, which includes a venting valve, a venting riser, and a venting riser support. The venting valve is connected to the test pipeline and the venting riser, and the venting riser support is connected to the venting riser. The venting device is also used to vent the mixed gas in the test pipeline after obtaining the mixed gas test results.
[0022] In some embodiments, the first gas is carbon dioxide and the second gas is hydrogen.
[0023] The technical effects of any implementation method in the second aspect can be found in the technical effects of any implementation method in the first aspect mentioned above, and will not be repeated here.
[0024] Thirdly, a mixed gas testing device is provided, which includes an input module, a sampling module, and a processing module.
[0025] The aforementioned input module is used to input a first gas into the test pipeline through the first air inlet and a second gas into the test pipeline through the second air inlet, wherein the first gas and the second gas are gases with different physical properties.
[0026] The sampling module described above is used to sample the mixed gas in the test pipeline using a gas sampling device to obtain the sampled gas, wherein the mixed gas includes a first gas and a second gas.
[0027] The aforementioned processing module is used to analyze the sampled gas through a testing device to obtain the mixed gas test results, wherein the mixed gas test results are used to indicate the mixing effect of the first gas and the second gas.
[0028] In some embodiments, the mixed gas testing apparatus provided in this application further includes: an adjustment module, configured to: adjust the pipeline pressure value of the test pipeline, the first gas flow rate value of the first gas, and the second gas flow rate value of the second gas, wherein the pipeline pressure value indicates the pressure when mixed gases are present in the test pipeline, the first gas flow rate value indicates the input rate of the first gas, and the second gas flow rate value indicates the input rate of the second gas. The input module is configured to: input the first gas into the test pipeline having the pipeline pressure value through the first inlet at the first gas flow rate value; and input the second gas into the test pipeline having the pipeline pressure value through the second inlet at the second gas flow rate value.
[0029] In some embodiments, the processing module is further configured to: analyze the sampled gas using a testing device to obtain the actual mixing ratio and stratification state of the sampled gas, wherein the stratification state indicates the vertical distribution of the first gas and the second gas in the test pipeline; compare the actual mixing ratio with a preset mixing ratio to obtain the mixing ratio difference of the sampled gas; and obtain the mixed gas test result based on the mixing ratio difference and the stratification state.
[0030] In some embodiments, the processing module is further configured to: perform gas concentration analysis on the sampled gas using a testing device to obtain a first concentration value of the first gas and a second concentration value of the second gas; and obtain the actual blending ratio based on the first and second concentration values.
[0031] In some embodiments, the above-described input module is further configured to purge the test pipeline at least once through the first air inlet and / or the second air inlet before inputting the first gas and the second gas into the test pipeline.
[0032] In some embodiments, the input module is further configured to vent the mixed gas in the test pipeline through a venting device after obtaining the test results of the mixed gas.
[0033] In some embodiments, the first gas is carbon dioxide and the second gas is hydrogen.
[0034] The technical effects of any implementation method in the third aspect can be found in the technical effects of any implementation method in the first aspect mentioned above, and will not be repeated here.
[0035] Fourthly, a computer device is provided, comprising: a processor and a memory, wherein the memory stores at least one computer program, and the at least one computer program is loaded and executed by the processor to implement the above-mentioned method for testing mixed gases.
[0036] The solution provided in the fourth aspect above is used to implement the method provided in the first aspect above, and its specific implementation will not be described in detail here. The technical effects corresponding to any implementation method in the solution provided in the fourth aspect above can be found in the technical effects corresponding to any implementation method in the first aspect above, and will not be described in detail here.
[0037] It should be noted that any of the possible implementations of any of the above aspects can be combined, provided that the solutions do not contradict each other. Attached Figure Description
[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0039] Figure 1 A schematic diagram of a mixed gas testing system provided as an exemplary embodiment; Figure 2 A schematic flowchart of a method for testing mixed gases provided as an exemplary embodiment; Figure 3 A schematic flowchart of another method for testing mixed gases provided as an exemplary embodiment; Figure 4 A schematic diagram of another mixed gas testing system provided as an exemplary embodiment; Figure 5 A schematic diagram of a mixed gas testing device provided as an exemplary embodiment; Figure 6 A schematic diagram of the structure of a computer device provided for an exemplary embodiment. Detailed Implementation
[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0041] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0043] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.
[0044] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0045] In the embodiments of this application, at least one can also be described as one or more, and multiple can be two, three, four or more, and this application does not impose any restrictions.
[0046] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0047] In some scenarios where gas is transported via pipeline, at least two gases are often mixed for transport. Taking the mixed transport of carbon dioxide and hydrogen as an example, by using the same pipeline to transport carbon dioxide and hydrogen together, the energy consumption and cost of transporting them separately can be significantly reduced.
[0048] However, carbon dioxide and hydrogen have significantly different physical properties. For example, carbon dioxide has a molecular weight of 44.01 g / mol and a critical pressure of 7.38 MPa, while hydrogen has a molecular weight of 2.016 g / mol and a density of only 0.0827 at 20°C and 100 kPa. Therefore, uneven local concentration distribution and gas stratification (such as local enrichment of hydrogen) are likely to occur during the initial mixing stage of pipeline transportation, leading to decreased pipeline flow stability and even safety risks such as pipeline vibration, increased local corrosion, and hydrogen embrittlement, resulting in low safety of pipeline mixed gases.
[0049] Localized hydrogen enrichment refers to the phenomenon where hydrogen accumulates in a specific local space within a pipeline, resulting in a hydrogen concentration in that area that is significantly higher than the hydrogen concentration in the surrounding space / the entire pipeline.
[0050] Based on this, this application provides a method for testing mixed gases. The method involves inputting a first gas and a second gas into a test pipeline, then sampling the mixed gas in the pipeline to obtain sampled gas. Finally, the sampled gas is analyzed to obtain the mixed gas test results. This method can obtain the mixing uniformity and stratification of the first and second gases at different pipeline lengths when they are mixed and transported in the same test pipeline. This provides data support for mixed gas transport processes and pipe material selection and protection, thereby improving the safety of pipeline transport of mixed gases.
[0051] The solution provided in this application can be applied to Figure 1 In the mixed gas testing system shown, Figure 1 A schematic diagram of a mixed gas testing system provided for an exemplary embodiment.
[0052] For example, the mixed gas testing system includes a first gas cylinder group 101, a first gas pressure reducing valve 102, a first gas mass flow meter 103, a second gas cylinder group 104, a second gas pressure reducing valve 105, a second gas mass flow meter 106, a second gas injection valve 107, a first gas injection valve 108, a first pressure gauge 109, a third gas pressure reducing valve 110, a first gas sampling cylinder 111, a first gas sampling bag 112, a thermometer 113, and a second pressure gauge 109. Table 114, Fourth Gas Pressure Reducing Valve 115, Second Gas Sampling Cylinder 116, Second Gas Sampling Bag 117, Third Pressure Gauge 118, Fifth Gas Pressure Reducing Valve 119, Third Gas Sampling Cylinder 120, Third Gas Sampling Bag 121, Safety Valve 122, Pipeline Grounding Device 123, Vent Valve 124, Vent Riser 125, Vent Riser Support 126, First Gas Concentration Sensor 127, Test Unit 128, Computer 129, and Test Pipeline 130.
[0053] The first gas cylinder group 101 is used to store a first gas. The first gas cylinder group 101 may include multiple first gas cylinders. For example, taking carbon dioxide as the first gas, the carbon dioxide cylinder can be 40L. The liquid carbon dioxide inside the cylinder is maintained at 3 to 5 MPa depending on the temperature. Multiple carbon dioxide cylinders are connected to the test pipeline 130 in the form of a cylinder group via a first gas pressure reducing valve 102. It should be noted that the test medium in the mixed gas testing system of this embodiment is industrial-grade high-purity carbon dioxide with a purity of 99.99% to avoid impurities affecting concentration detection.
[0054] The second gas cylinder group 104 is used to store a second gas. The second gas cylinder group 104 includes multiple second gas cylinders. For example, taking hydrogen as the second gas, the hydrogen cylinder can be 40L, and the pressure of the gaseous hydrogen inside the cylinder is 15MPa. Multiple hydrogen cylinders are connected to the test pipeline 130 in the form of a cylinder group via a second gas pressure reducing valve 105. It should be noted that the test medium in the mixed gas testing system of this embodiment is industrial-grade high-purity hydrogen with a purity of 99.99% to avoid impurities affecting concentration detection.
[0055] The first gas pressure reducing valve 102, the second gas pressure reducing valve 105, the third gas pressure reducing valve 110, the fourth gas pressure reducing valve 115, and the fifth gas pressure reducing valve 119 are used to reduce the higher gas pressure in the pipeline before the pressure reducing valve to the level required in the pipeline after the pressure reducing valve.
[0056] The first gas mass flow meter 103 is used to measure the flow rate of the first gas passing through it per unit time. When used in conjunction with the first gas pressure reducing valve 102, the gas flow rate can be controlled to reach and stabilize at the desired flow rate value. For example, the first gas mass flow meter 103 has a pressure resistance of 10 MPa and a measuring range of 0 to 300 N. The measurement accuracy is ±0.5%FS. The injection status of the first gas can be determined by the measurement value of the first gas mass flow meter 103.
[0057] The second gas mass flow meter 106 is used to measure the flow rate of the second gas passing through it per unit time. When used in conjunction with the second gas pressure reducing valve 105, the flow rate of the second gas can be controlled to reach and stabilize at the desired flow rate value. For example, the second gas mass flow meter 106 has a pressure resistance of 10 MPa and a measuring range of 0 to 50 N. The measurement accuracy is ±0.5%FS. The injection status of the second gas can be determined by the measurement value of the second gas mass flow meter 106.
[0058] The first gas injection valve 108 is a valve used to control the flow of gas. By opening the first gas injection valve 108, the first gas can be injected into the test pipeline 130, and by closing the first gas injection valve 108, the injection of the first gas into the test pipeline 130 can be stopped.
[0059] The second gas injection valve 107 is a valve used to control the flow of gas. By opening the second gas injection valve 107, a second gas can be injected into the test pipeline 130, and by closing the second gas injection valve 107, the injection of the second gas into the test pipeline 130 can be stopped.
[0060] The first pressure gauge 109, the second pressure gauge 114, and the third pressure gauge 118 are instruments used to measure the gas pressure in the test pipeline 130. For example, the first pressure gauge 109, the second pressure gauge 114, and the third pressure gauge 118 can be stainless steel pressure gauges with a range of 0 to 4 MPa.
[0061] The first gas sampling cylinder 111, the second gas sampling cylinder 116, and the third gas sampling cylinder 120 are high-pressure seamless sealed containers used for collecting, storing, and transporting gases in the test pipeline 130 to ensure that the sample composition remains unchanged for subsequent analysis. For example, the parameters of the gas sampling cylinders can be set as follows: material is 316 stainless steel, pressure resistance is 12 MPa, capacity is 500 ml, equipped with a 0.25 MPa pressure reducing valve, a 0 to 0.25 MPa pressure gauge, 1 / 4 NPT(M)-1 / 4 NPT(M) 316 valves, and a metal hose for gas sampling.
[0062] It should be noted that the gas sampling cylinders need to be purged and emptied before the pipeline air replacement and pressure testing phases, and the gas sampling pressure reducing valves should be adjusted to 0.15 MPa during sampling. The gas sampling pressure reducing valves include a third gas pressure reducing valve 110, a fourth gas pressure reducing valve 115, and a fifth gas pressure reducing valve 119.
[0063] The first gas sampling bag 112, the second gas sampling bag 117, and the third gas sampling bag 121 are used to store the sampled gas. For example, the gas sampling bags can be made of aluminum foil composite film, can employ a dual-valve design, have a capacity of 5L, and a pressure resistance of 20kPa. It should be noted that a vacuum pump must be used to evacuate the bag before use to remove impurities and avoid affecting the test results.
[0064] The temperature gauge 113 is an instrument used to measure the temperature in the test pipe 130. For example, the temperature gauge 113 may be a stainless steel temperature gauge with a range of 0 to 100°C.
[0065] Safety valve 122 is an overpressure protection valve. Specifically, when the pressure in test pipeline 130 exceeds a predetermined safety value, safety valve 122 will automatically open to discharge the excess medium, thereby preventing the pressure in test pipeline 130 from exceeding the permissible limit. For example, the relief pressure of the safety valve is 2.3 MPa.
[0066] The pipeline grounding device 123 is used to effectively ground the main body of the test pipeline 130 to ensure safety during the test process.
[0067] Vent valve 124 is a valve used to discharge the medium in test pipeline 130 into the atmosphere.
[0068] The vent riser 125 is a vertically upward venting pipe used in conjunction with the vent valve 124. It is used to guide the gas discharged from the test pipe 130 through the vent valve 124 along the vertical riser to a safe outdoor height before further discharge. It should be noted that the vent riser 125 must meet requirements such as corrosion resistance, high pressure resistance, and good safety, as well as meeting safe venting diameter and height requirements. For example, the vent riser 125 can be a DN32 (Φ38mm) seamless 304 stainless steel pipe with a wall thickness of 3.0mm and a height of 3m. Here, DN refers to the nominal diameter of the pipe, used to identify the general diameter of pipes and fittings, not the actual inner or outer diameter.
[0069] The venting riser support 126 refers to the support used to fix and support the venting riser 125.
[0070] Specifically, the vent riser 125 is connected to the test pipeline 130 through the vent valve 124, and the main body of the test pipeline is effectively grounded through the pipeline grounding device 123 to ensure safety during the test.
[0071] Test unit 128 is used to perform gas concentration analysis on the sampled gas.
[0072] Computer 129 is used to receive and store test data for mixed gas testing.
[0073] Test pipe 130 refers to the pipe used to transport mixed gases. The pipes used in mixed gas testing include a main pipe and T-shaped branch pipes. The main pipe is test pipe 130, and the T-shaped branch pipe is the hydrogen inlet pipe. Both test pipe 130 and the T-shaped branch pipe need to meet pressure-bearing requirements. It should be noted that test pipe 130 needs to meet requirements such as corrosion resistance, high pressure resistance, and good safety. For example, test pipe 130 can be a 304 stainless steel seamless pipe. Specifically, the test pipe can be a DN100 (Φ108mm) 304 stainless steel seamless pipe with a wall thickness of 4.0mm and a length of 25m; the T-shaped branch pipe can be a DN32 (Φ38mm) 304 stainless steel seamless pipe with a wall thickness of 3.0mm and a length of 2m.
[0074] The test pipeline 130 is connected to the first pressure gauge 109, the second pressure gauge 114, the third pressure gauge 118 and the thermometer 113 via threads. The test pipeline 130 is also connected to the first gas cylinder group 101 via the first gas injection valve 108, the first gas mass flow meter 103 and the first gas pressure reducing valve 102; and to the second gas cylinder group 104 via the second gas injection valve 107, the second gas mass flow meter 106 and the second gas pressure reducing valve 105.
[0075] The first gas concentration sensor 127 is used to monitor the concentration of the first gas at the outlet of the vent riser 125. For example, the parameters of the first gas concentration sensor 127 can be set as follows: measurement range of 0 to 100% VOLCO2, resolution of 0.01% VOL, accuracy of ±1%FS industrial grade, and operating temperature of -20℃ to +50℃.
[0076] Optionally, the system includes: a first gas cylinder group 101, a first gas pressure reducing valve 102, a first gas mass flow meter 103, a second gas cylinder group 104, a second gas pressure reducing valve 105, a second gas mass flow meter 106, a second gas injection valve 107, a first gas injection valve 108, a first pressure gauge 109, a third gas pressure reducing valve 110, a first gas sampling cylinder 111, a first gas sampling bag 112, a thermometer 113, a second pressure gauge 114, and a fourth gas pressure reducing valve 1. 15. Second gas sampling cylinder; 116. Second gas sampling bag; 117. Third pressure gauge; 118. Fifth gas pressure reducing valve; 119. Third gas sampling cylinder; 120. Third gas sampling bag; 121. Safety valve; 122. Pipeline grounding device; 123. Vent valve; 124. Vent riser; 125. Vent riser support; 126. First gas concentration sensor; 127. Test unit; 128. Computer; 129. and test pipeline; 130. The quantity, type, and connection relationship of these components are not limited to: Figure 1 As shown, this application does not limit this.
[0077] Furthermore, the test site for the mixed gas test provided in this application embodiment can be a rectangular flat soil area. This test site needs to meet the requirements for fixing the test pipeline and the power requirements for the on-site test flow meter. The test pipeline can be laid horizontally, with the main pipeline suspended 0.5m above the ground, to facilitate pressure testing and leak detection of the test pipeline and online sampling of the mixed gas.
[0078] Figure 2This is a schematic flowchart illustrating a method for testing mixed gases, provided as an exemplary embodiment. The method is applied to a mixed gas testing system, which includes: a first inlet, a second inlet, a test pipeline, at least two gas sampling devices, and a testing device. The first and second inlets are respectively connected to the test pipeline. The at least two gas sampling devices are respectively positioned at different points along the pipeline length and are respectively connected to the testing device. The mixed gas testing system can be... Figure 1 The mixed gas testing system in the middle.
[0079] like Figure 2 As shown, the mixed gas testing method provided in this application embodiment may include: Step S202: The mixed gas testing system inputs the first gas into the test pipeline through the first inlet and the second gas into the test pipeline through the second inlet.
[0080] In this configuration, the first gas and the second gas are gases with different physical properties. Optionally, the first gas is carbon dioxide and the second gas is hydrogen. Alternatively, the first gas is hydrogen and the second gas is carbon dioxide.
[0081] A test pipeline refers to a pipeline that transports mixed gases. Optionally, the test pipeline can be a large-scale pipeline, such as DN100 (Φ108mm). Here, DN100 refers to a nominal diameter of 100 mm, and Φ108mm refers to an actual outer diameter of 108 mm.
[0082] Large-scale pipelines refer to industrial pipelines with large diameters and specifications. In the pipeline transportation field, pipelines with DN80 and above (such as DN100, DN150, DN200, DN300, etc.) are generally classified as large-scale pipelines. Among them, DN refers to the nominal diameter of the pipeline, which is used to identify the general diameter of the pipeline and fittings, rather than the actual inner or outer diameter.
[0083] In some embodiments, the first / second inlet of the test pipeline can be directly connected to a gas cylinder group. Alternatively, the first / second inlet of the test pipeline can be connected to the gas cylinder group by sequentially connecting an injection valve, a gas mass flow meter, and a gas pressure reducing valve. For example, the first inlet of the test pipeline can be sequentially connected to a first injection valve, a first gas mass flow meter, a first gas pressure reducing valve, and a first gas cylinder group containing a first gas. The second inlet of the test pipeline can be sequentially connected to a second injection valve, a second gas mass flow meter, a second gas pressure reducing valve, and a second gas cylinder group containing a second gas.
[0084] Specifically, the first gas stored in the first gas cylinder group can be injected into the test pipeline sequentially through the first gas pressure reducing valve, the first gas mass flow meter, and the first gas injection valve. The second gas stored in the second gas cylinder group can be injected into the test pipeline sequentially through the second gas pressure reducing valve, the second gas mass flow meter, and the second gas injection valve.
[0085] In some embodiments, the mixed gas testing system adjusts the pipeline pressure value of the test pipeline, the first gas flow rate value of the first gas, and the second gas flow rate value of the second gas.
[0086] The pipeline pressure value indicates the pressure of the mixed gas in the test pipeline. The first gas flow rate value indicates the input rate of the first gas. The second gas flow rate value indicates the input rate of the second gas. The pipeline pressure value is obtained by measuring the pressure in the test pipeline using a pressure gauge.
[0087] Specifically, the flow rates of the first gas and the second gas are determined based on a preset mixing ratio. For example, the mixed gas testing system obtains a preset mixing ratio of 8:2, and based on this preset mixing ratio, the flow rate of the first gas is determined to be 8. The second gas flow rate is 2 Furthermore, the flow regime of both the first and second gases is turbulent.
[0088] The preset mixing ratio refers to the mixing ratio of the first gas and the second gas injected into the test pipeline.
[0089] The mixed gas testing system inputs a first gas into a test pipeline with a pipeline pressure value through a first inlet at a first gas flow rate value; and inputs a second gas into the test pipeline with a pipeline pressure value through a second inlet at a second gas flow rate value.
[0090] Specifically, after opening the first gas injection valve, the flow rate of the first gas input to the test pipeline with the pipeline pressure value can be changed by adjusting the opening degree of the first gas pressure reducing valve connected to the first gas inlet. The first gas mass flow meter displays the measured flow rate value of the first gas, and by adjusting the opening degree of the first gas pressure reducing valve, the flow rate of the first gas reaches the first gas flow rate value.
[0091] For example, the first gas flow rate value obtained according to the preset mixing ratio is 8. After opening the first gas injection valve, the first gas cylinder group begins to inject the first gas into the test pipeline through the first gas injection port. At this time, the flow rate of the first gas can be obtained by the first gas mass flow meter, i.e., the measured value of the first gas flow rate. If the measured value of the first gas flow rate is 6... If the pressure reducing valve opening is increased, the flow rate of the first gas will be increased; if the measured flow rate of the first gas is 10... Then, reduce the opening of the pressure reducing valve to decrease the flow rate of the first gas until the flow rate of the first gas measured by the first gas mass flow meter is 8. This allows for airflow through the first air intake at 8... The flow rate will inject the first gas into the test pipeline.
[0092] Secondly, the method of inputting the second gas into the test pipeline with the pipeline pressure value through the second air inlet at the second gas flow rate value is the same as the method of inputting the first gas into the test pipeline with the pipeline pressure value through the first air inlet at the first gas flow rate value, and will not be described in detail here.
[0093] Step S204: The mixed gas testing system uses a gas sampling device to sample the mixed gas in the test pipeline to obtain the sampled gas.
[0094] The mixed gas refers to the gas obtained by mixing the first gas and the second gas in a predetermined ratio. The mixed gas includes the first gas and the second gas.
[0095] Sampling gas refers to the gas obtained by sampling gas at different locations along different lengths of a test pipeline with different pipeline pressures.
[0096] In one possible implementation, the gas sampling device includes a gas pressure reducing valve, a gas sampling cylinder, and a gas sampling bag. The gas sampling cylinder is used to collect, store, and transport the gas in the test pipeline to ensure that the sample composition remains unchanged for subsequent analysis. The gas sampling bag is used to store the sampled gas collected from the gas sampling cylinder. The gas pressure reducing valve of the gas sampling device is connected to the test pipeline via a flange. The first end of the gas pressure reducing valve is connected to the test pipeline, and the second end of the gas pressure reducing valve is connected to the first end of the gas sampling cylinder. The second end of the gas sampling cylinder is connected to the gas sampling bag.
[0097] Multiple gas sampling devices are installed at different points along the length of the test pipeline to sample the mixed gas at these locations. For example, the gas sampling devices could be installed at 4m, 8m, and 20m from the inlet of the test pipeline. The sampling location can be at the upper part of the test pipeline.
[0098] The test pipeline inlet refers to the pipe opening located near the first and second air inlets in the test pipeline. The test pipeline inlet has both a first and a second air inlet, through which the first and second gases enter the test pipeline. When the mixed gas testing system samples the mixed gas at different lengths within the test pipeline using a gas sampling device, the mixed gas at the sampling location flows through a gas pressure reducing valve and a gas sampling cylinder, ultimately entering different gas sampling bags, thus obtaining sampled gases at different pipeline lengths.
[0099] It should be noted that in the same mixed gas test, the mixed gas test system needs to take multiple samples of the mixed gas at the same location along the same pipe length using a gas sampling device to obtain multiple sets of sampled gases, in order to reduce the impact of errors on the test results and ensure the accuracy of the test results.
[0100] Step S206: The mixed gas testing system analyzes the sampled gas through the testing device to obtain the mixed gas test results.
[0101] The results of the mixed gas test are used to indicate the mixing effect of the first gas and the second gas. The mixed gas test results include the mixing uniformity and stratification of the mixed gas at different pipe length locations.
[0102] In some embodiments, the testing apparatus includes a testing unit and a computer. The mixed gas testing system analyzes the sampled gas using the testing apparatus to obtain the actual mixing ratio and stratification state of the sampled gas. Then, it compares the actual mixing ratio with a preset mixing ratio to obtain the mixing ratio difference of the sampled gas. Finally, based on the mixing ratio difference and stratification state, the mixed gas test result is obtained.
[0103] The actual mixing ratio refers to the actual mixing ratio of the first gas and the second gas in the test pipeline. Stratification indicates the distribution of the first gas and the second gas in the vertical direction along the radial direction of the test pipeline. The mixing ratio difference refers to the difference between the actual mixing ratio and the preset mixing ratio.
[0104] Specifically, the mixed gas testing system analyzes the concentration of a sampled gas using a testing device to obtain a first concentration value for a first gas and a second concentration value for a second gas. Then, based on the first and second concentration values, the actual mixing ratio is obtained. The first concentration value indicates the concentration of the first gas at different lengths within the test pipeline; for example, it can be the proportion of the volume of the first gas in the sampled gas to the total volume of the sampled gas. Similarly, the second concentration value indicates the concentration of the second gas at different lengths within the test pipeline; it can also be the proportion of the volume of the second gas in the sampled gas to the total volume of the sampled gas.
[0105] For example, when the preset mixing ratio is 8:2, the mixed gas testing system analyzes the gas concentration of the sampled gas using a testing device, obtaining a first concentration value of 13% for the first gas and a second concentration value of 87% for the second gas, thus the actual mixing ratio is 13:87. The mixed gas testing system compares the obtained actual mixing ratio with the preset mixing ratio using a computer to obtain the mixing ratio difference. If the mixing ratio difference is large, it indicates that the first and second gases are not mixed uniformly; if the mixing ratio difference is small or zero, it indicates that the gas mixing is relatively uniform. For example, the mixing ratio difference of the sampled gas can be obtained by subtracting the preset mixing ratio from the actual mixing ratio. For instance, under the condition of a pipeline pressure of 1.5 MPa and a preset mixing ratio of 8:2, if the actual mixing ratio at 4m from the pipeline inlet is 13:87, it indicates that the mixing uniformity of the first and second gases at this location is poor.
[0106] In other embodiments, the mixed gas testing system analyzes the test parameters obtained under different preset mixing ratios based on the test parameters transmitted to the computer, and then adjusts the design and pipe protection of the pipeline for transporting the mixed gas of the first gas and the second gas according to the parameters.
[0107] The test parameters are used to indicate the test results obtained by performing a mixed gas test according to the mixed gas test method provided in the embodiments of this application, including but not limited to the difference in mixing ratio and the stratification state.
[0108] For example, the first gas is carbon dioxide ( The second gas is hydrogen ( Taking 8 as an example, under the conditions of a preset mixing ratio of 8:2 and a pipeline pressure of 1.5MPa, a mixed gas test was conducted, and the test results are shown in Table 1 below.
[0109] Table 1
[0110] As shown in Table 1, at 4m from the inlet of the test pipeline, the ratio of the first concentration value to the second concentration value is 13.0%:86.3%, meaning the actual mixing ratio at 4m from the inlet is 13.0%:86.3%, while the preset mixing ratio is 8:2. It is understandable that the more uniformly carbon dioxide and hydrogen are mixed, the closer the actual mixing ratio will be to 8:2. Therefore, the mixing uniformity of carbon dioxide and hydrogen at 4m from the inlet of the test pipeline is relatively poor.
[0111] Understandably, if the concentration distribution ratio of carbon dioxide and hydrogen at the sampling location is consistent with the preset mixing ratio, it indicates that there is no stratification of the carbon dioxide and hydrogen mixture at that pipe length. If the concentration distribution ratio of carbon dioxide and hydrogen at the sampling location differs from the preset mixing ratio, it indicates that there is stratification of the carbon dioxide and hydrogen mixture at that pipe length, and the greater the difference between the concentration distribution ratio of carbon dioxide and hydrogen and the preset mixing ratio, the more obvious the stratification phenomenon.
[0112] Since the sampling location was the upper layer of the pipe, and the sampling result was 13.0%:86.3%, it indicates that the concentration distribution ratio of carbon dioxide and hydrogen in the upper layer of the pipe was 13.0%:86.3%, which is significantly different from 80%:20%. Therefore, the stratification of carbon dioxide and hydrogen is more obvious at this length of the pipe, and hydrogen accumulates in the upper layer of the pipe, meaning that the hydrogen concentration is higher in the upper layer of the pipe. Correspondingly, the carbon dioxide concentration is higher in the lower layer of the pipe, and the gas flow stratification phenomenon is more obvious at this time.
[0113] Furthermore, since the stratification of carbon dioxide and hydrogen is obvious at 4m from the inlet of the test pipeline, and hydrogen accumulates in the upper layer of the pipeline, the pipeline material within 4m from the inlet of the test pipeline can be selected as hydrogen-resistant material to reduce the safety risks such as localized corrosion and hydrogen embrittlement that may be caused by the local accumulation of hydrogen.
[0114] At 8m from the inlet of the test pipe, the ratio of the first concentration value to the second concentration value was 44.4%:55.2%, meaning that the actual mixing ratio at 8m from the inlet of the test pipe was 44.4%:55.2%. Compared to 4m from the inlet of the test pipe, the mixing uniformity at 8m from the inlet of the test pipe was improved, but gas flow stratification still existed.
[0115] At 20m from the inlet of the test pipeline, the ratio of the first concentration value to the second concentration value was 72.5%:27.2%, which means that the actual mixing ratio at 20m from the inlet of the test pipeline was 72.5%:27.2%, close to the preset mixing ratio of 8:2. This indicates that carbon dioxide and hydrogen were basically mixed evenly at 20m from the inlet of the test pipeline, and the stratification phenomenon had basically disappeared.
[0116] For example, the first gas is carbon dioxide ( The second gas is hydrogen ( Taking 8 as an example, under the conditions of a preset mixing ratio of 8:2 and a pipeline pressure of 1.2MPa, a mixed gas test was conducted, and the test results are shown in Table 2 below.
[0117] Table 2
[0118] As shown in Table 2, at the inlet of the test pipe at 4m, the ratio of the first concentration value to the second concentration value is 12.4%:87.4%, meaning the actual mixing ratio at the inlet of the test pipe at 4m is 12.4%:87.4%, while the preset mixing ratio is 8:2. Therefore, the mixing uniformity of carbon dioxide and hydrogen is poor at the inlet of the test pipe at 4m, and gas flow stratification occurs.
[0119] At 8m from the inlet of the test pipe, the ratio of the first concentration value to the second concentration value was 39.6%:59.9%, meaning that the actual mixing ratio at 8m from the inlet of the test pipe was 39.6%:59.9%. Compared to 4m from the inlet of the test pipe, the mixing uniformity at 8m from the inlet of the test pipe was improved, but gas flow stratification still existed.
[0120] At 20m from the inlet of the test pipeline, the ratio of the first concentration value to the second concentration value was 69.4%:30.3%, which means that the actual mixing ratio at 20m from the inlet of the test pipeline was 69.4%:30.3%, close to the preset mixing ratio of 8:2. This indicates that carbon dioxide and hydrogen were basically mixed evenly at 20m from the inlet of the test pipeline, and the stratification phenomenon had basically disappeared.
[0121] Furthermore, by comparing the test results of mixed gas at flow pressures of 1.5 MPa and 1.2 MPa, it can be found that in the initial mixed flow stage, compared with 1.5 MPa, the gas flow stratification phenomenon is more significant when the pipeline pressure is 1.2 MPa, and the mixed gas is less uniform. In other words, during pipeline transmission, the higher the pipeline pressure, the more uniform the mixed gas is.
[0122] In summary, the technical solution provided in this application, by inputting the first gas and the second gas into a test pipeline, sampling the mixed gas in the test pipeline, obtaining sampled gas, and finally analyzing the sampled gas to obtain mixed gas test results, can achieve the mixing uniformity and stratification of the first gas and the second gas at different pipeline lengths when the first gas and the second gas are mixed and transported in the same test pipeline. This provides data support for mixed gas transportation processes and pipe material selection and protection, thereby improving the safety of pipeline transportation of mixed gases.
[0123] Since the test pipeline contains air or other gases, the existing gas in the test pipeline needs to be purged before conducting mixed gas tests to avoid interference from the existing gas in the test pipeline with the mixed gas test results.
[0124] Figure 3 A schematic flowchart of another method for testing mixed gases provided as an exemplary embodiment. The method further includes step S201 before step S202.
[0125] Step S201: Before introducing the first gas and the second gas into the test pipeline, the mixed gas test system purges the test pipeline at least once through the first air inlet and / or the second air inlet.
[0126] Purging refers to the process of removing residual gas or impurities from the test pipeline using a replacement gas. Replacement refers to replacing the original gas in the test pipeline with a gas to achieve cleanliness or safety. Optionally, the replacement gas includes nitrogen, inert gas, etc., but is not limited to these, and the embodiments of this application do not specifically limit this.
[0127] Taking carbon dioxide as the first gas and hydrogen as the second gas as an example, a mixed gas test can be conducted. Before the test, an inert gas or other gas that will not interfere with the test results can be used to purge the test pipeline to remove any residual gas. For example, nitrogen can be used to purge the impurity gas from the test pipeline at a high flow rate, utilizing the kinetic energy of the gas.
[0128] Before conducting the mixed gas test experiment, the tube can be purged three times with test gases such as carbon dioxide and / or hydrogen. At the same time, the carbon dioxide concentration in the tube can be monitored by a carbon dioxide concentration sensor to determine the gas purging status, which will facilitate subsequent experiments.
[0129] Optionally, before introducing the first gas and the second gas into the test pipeline, the mixed gas testing system can inject replacement gas into the test pipeline through the first inlet to purge the test pipeline at least once; or, it can inject replacement gas into the test pipeline through the second inlet to purge the test pipeline at least once; or, it can simultaneously inject replacement gas into the test pipeline through the first inlet and the second inlet to purge the test pipeline at least once.
[0130] After conducting a mixed gas test using a test pipeline, which is filled with a mixture of the first and second gases, the gas in the test pipeline needs to be discharged to avoid interference with the test results of the next mixed gas test.
[0131] like Figure 3 As shown, step S207 is included after step S206.
[0132] Step S207: After obtaining the mixed gas test results, the mixed gas test system vents the mixed gas in the test pipeline through the venting device.
[0133] Evacuation refers to the process of removing gas from the test pipeline.
[0134] In some embodiments, the mixed gas testing system provided in this application further includes a venting device, which includes a venting valve, a venting riser, and a venting riser support. The venting valve is connected to the test pipeline and the venting riser, and the venting riser support is connected to the venting riser.
[0135] Specifically, inert gas can be used to purge the test pipeline, and then the residual mixed gas and impurity gas in the test pipeline after the test is completed can be discharged through the venting device to avoid the residual gas in the test pipeline from interfering with the next mixed gas test.
[0136] In some embodiments, the mixed gas testing system provided in this application further includes a first gas concentration sensor, which monitors the concentration of the first gas in the test pipeline and then determines whether the mixed gas in the test pipeline has been vented.
[0137] In summary, the technical solution provided in this application, by inputting the first gas and the second gas into a test pipeline, sampling the mixed gas in the test pipeline, obtaining sampled gas, and finally analyzing the sampled gas to obtain mixed gas test results, can achieve the mixing uniformity and stratification of the first gas and the second gas at different pipeline lengths when the first gas and the second gas are mixed and transported in the same test pipeline. This provides data support for mixed gas transportation processes and pipe material selection and protection, thereby improving the safety of pipeline transportation of mixed gases.
[0138] The above embodiments describe the mixed gas testing method provided in this application. The following is a detailed description of a mixed gas testing system applied to this mixed gas testing method.
[0139] like Figure 4 A schematic diagram of another mixed gas testing system provided for an exemplary embodiment, as shown below. Figure 4 As shown, the mixed gas testing system includes: a first air inlet 301, a second air inlet 302, a test pipeline 303, at least two gas sampling devices 304, and a testing device 305.
[0140] Specifically, the first air inlet 301 and the second air inlet 302 are respectively connected to the test pipe 303, and at least two gas sampling devices 304 are respectively set at different pipe length positions, and at least two gas sampling devices 304 are respectively connected to the test device 305.
[0141] In some embodiments, a first air inlet 301 introduces a first gas into a test pipe 303, and a second air inlet 302 introduces a second gas into the test pipe 303. The first gas and the second gas are gases with different physical properties. A gas sampling device 304 samples the mixed gas in the test pipe 303 to obtain a sampled gas. A testing device 305 analyzes the sampled gas to obtain a mixed gas test result. The mixed gas test result indicates the mixing effect of the first gas and the second gas.
[0142] The foregoing mainly describes the solution provided in this application. Accordingly, this application also provides a mixed gas testing device for implementing the above-described method embodiments.
[0143] like Figure 5 The schematic diagram of the mixed gas testing device shown can include an input module 401, a sampling module 402, and a processing module 403.
[0144] The input module 401 is used for execution. Figure 2 and Figure 3 The illustrated method includes step S202.
[0145] Sampling module 402 is used to perform Figure 2 and Figure 3 The illustrated method includes step S204.
[0146] Processing module 403 is used to execute Figure 2 The operation of step S206 and Figure 3 The illustrated method includes steps S201 and S207.
[0147] In some embodiments, the mixed gas testing device includes hardware structures and / or software modules corresponding to the execution of each function in order to achieve the above-described functions. Those skilled in the art will readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0148] This application embodiment can divide the mixed gas testing device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one mixed gas testing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.
[0149] like Figure 6 As shown, the computer device provided in this application embodiment may include a processor 501, a bus 502, a communication interface 503, and a memory 504. The processor 501, memory 504, and communication interface 503 communicate with each other via the bus 502. It should be understood that this application does not limit the number of processors and memories in the network device.
[0150] Bus 502 can be a PCI bus, an Extended Industry Standard Architecture (EISA) bus, or a UB bus, etc. Buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 6 The bus 502 may be represented by a single line, but this does not mean that there is only one bus or one type of bus. The bus 502 may include a path for transmitting information between various components of the network device (e.g., memory 504, processor 501, communication interface 503).
[0151] Processor 501 may include any one or more processors such as CPU, graphics processing unit (GPU), microprocessor (MP), or digital signal processor (DSP).
[0152] Memory 504 may include volatile memory, such as random access memory (RAM). Processor 501 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid state drive (SSD).
[0153] The communication interface 503 uses transceiver modules, such as, but not limited to, network interface cards and transceivers, to enable communication between network devices and other devices or communication networks.
[0154] The memory 504 stores executable program code, and the processor 501 executes the executable program code to implement the functions of the aforementioned method embodiments. That is, the memory 504 stores instructions for performing the above-described mixed gas testing method.
[0155] Through the above description of the implementation methods, those skilled in the art will clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the module can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, modules, and units described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.
[0156] Since the mixed gas testing device and computer equipment in the embodiments of the present invention can be applied to the above method, the technical effects that can be obtained can also be referred to the above method embodiments, and the embodiments of the present invention will not be repeated here.
[0157] The method steps in this embodiment can be implemented in hardware or by a processor executing software instructions. The software instructions can consist of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in a network device. Of course, the processor and storage medium can also exist as discrete components in the network device.
[0158] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions of the embodiments of this application are performed, in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable module. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, a computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means.
[0159] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A method for testing mixed gases, characterized in that, The method is applied to a mixed gas testing system, which includes: a first inlet, a second inlet, a test pipeline, at least two gas sampling devices, and a testing device; the first inlet and the second inlet are respectively connected to the test pipeline, and the at least two gas sampling devices are respectively located at different positions along the pipeline length and are respectively connected to the testing device; the method includes: A first gas is introduced into the test pipe through the first air inlet, and a second gas is introduced into the test pipe through the second air inlet. The first gas and the second gas are gases with different physical properties. The gas sampling device is used to sample the mixed gas in the test pipeline to obtain the sampled gas, wherein the mixed gas includes the first gas and the second gas; The sampled gas is analyzed by the testing device to obtain the mixed gas test results, which are used to indicate the mixing effect of the first gas and the second gas.
2. The method according to claim 1, characterized in that, The method further includes: Adjust the pipeline pressure value, the first gas flow rate value of the first gas, and the second gas flow rate value of the second gas in the test pipeline, wherein the pipeline pressure value is used to indicate the pressure of the mixed gas in the test pipeline, the first gas flow rate value is used to indicate the input rate of the first gas, and the second gas flow rate value is used to indicate the input rate of the second gas. The step of introducing a first gas into the test pipeline through the first air inlet and introducing a second gas into the test pipeline through the second air inlet includes: The first gas is input into the test pipe having the pipe pressure value through the first air inlet at the first gas flow rate value; The second gas is introduced into the test pipe having the pipe pressure value through the second air inlet at the second gas flow rate value.
3. The method according to claim 1, characterized in that, The step of analyzing the sampled gas using the testing device to obtain the mixed gas test results includes: The sampled gas is analyzed by the testing device to obtain the actual mixing ratio and stratification state of the sampled gas. The stratification state is used to indicate the distribution of the first gas and the second gas in the vertical direction of the radial direction of the testing pipe. By comparing the actual mixing ratio with the preset mixing ratio, the difference in the mixing ratio of the sampled gas is obtained. The test results of the mixed gas are obtained based on the difference in the mixing ratio and the stratification state.
4. The method according to claim 3, characterized in that, The step of analyzing the sampled gas using the testing device to obtain the actual mixing ratio of the sampled gas includes: The gas concentration of the sampled gas is analyzed by the testing device to obtain a first concentration value of the first gas and a second concentration value of the second gas. The actual blending ratio is obtained based on the first concentration value and the second concentration value.
5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Before introducing the first gas and the second gas into the test pipeline, the test pipeline is purged at least once through the first air inlet and / or the second air inlet.
6. The method according to any one of claims 1 to 4, characterized in that, The mixed gas testing system further includes: a venting device, the venting device comprising: a venting valve, a venting riser, and a venting riser support, the venting valve being connected to the test pipeline and the venting riser, and the venting riser support being connected to the venting riser; the method further includes: After obtaining the test results of the mixed gas, the mixed gas in the test pipeline is vented through the venting device.
7. The method according to any one of claims 1 to 4, characterized in that, The first gas is carbon dioxide, and the second gas is hydrogen.
8. A mixed gas testing system, characterized in that, The mixed gas testing system includes: a first air inlet, a second air inlet, a test pipeline, at least two gas sampling devices, and a testing device; the first air inlet and the second air inlet are respectively connected to the test pipeline, and the at least two gas sampling devices are respectively located at different positions along the length of the pipeline, and are respectively connected to the testing device; wherein... The first air inlet introduces a first gas into the test pipe, and the second air inlet introduces a second gas into the test pipe. The first gas and the second gas are gases with different physical properties. The gas sampling device samples the mixed gas in the test pipeline to obtain the sampled gas; The testing device analyzes the sampled gas to obtain mixed gas test results, which are used to indicate the mixing effect of the first gas and the second gas.
9. A device for testing mixed gases, characterized in that, The device includes: The input module is used to input a first gas into the test pipeline through a first air inlet and a second gas into the test pipeline through a second air inlet, wherein the first gas and the second gas are gases with different physical properties; The sampling module is used to sample the mixed gas in the test pipeline through a gas sampling device to obtain the sampled gas, wherein the mixed gas includes the first gas and the second gas; The processing module is used to analyze the sampled gas through a testing device to obtain the mixed gas test results, which are used to indicate the mixing effect of the first gas and the second gas.
10. A computer device, characterized in that, The computer device includes a processor and a memory, wherein the memory stores at least one computer program, and the at least one computer program is loaded and executed by the processor to implement the mixed gas testing method as described in any one of claims 1-7.