CN-121995009-A - Method, system, device and equipment for testing blending gas

CN121995009ACN 121995009 ACN121995009 ACN 121995009ACN-121995009-A

Abstract

The application provides a method, a system, a device and equipment for testing blended gas, relates to the technical field of pipeline transportation, and can obtain the mixing uniformity and layering condition of first gas and second gas when mixed gas is conveyed by a pipeline. The method is applied to a blending gas testing system, and the blending gas testing system comprises a first air inlet, a second air inlet, a testing pipeline, at least two gas sampling devices and a testing device, wherein the first air inlet and the second air inlet are respectively connected with the testing pipeline, the at least two gas sampling devices are respectively arranged at the positions of different pipeline lengths, and the at least two gas sampling devices are respectively connected with the testing device. The method includes inputting a first gas to the test tube through a first gas inlet and inputting a second gas to the test tube through a second gas inlet. And sampling the mixed gas in the test pipeline by a gas sampling device to obtain the sampled gas. And analyzing the sampled gas by a testing device to obtain a mixed gas testing result.

Inventors

MAN JIANFENG
WANG WEIBIN
OUYANG XIN
LI KANG
NIE CHAOFEI
PENG SHIYAO
Chai chong
HU ZICHAO
SUN SHENG

Assignees

国家石油天然气管网集团有限公司
国家石油天然气管网集团有限公司科学技术研究总院分公司

Dates

Publication Date: 20260508
Application Date: 20260224

Claims (10)

1. The method is applied to a blending gas testing system, and comprises a first gas inlet, a second gas inlet, a testing pipeline, at least two gas sampling devices and a testing device, wherein the first gas inlet and the second gas inlet are respectively connected with the testing pipeline, the at least two gas sampling devices are respectively arranged at different pipeline length positions, and the at least two gas sampling devices are respectively connected with the testing device, and the method comprises the following steps: Inputting first gas to the test pipeline through the first gas inlet, and inputting second gas to the test pipeline through the second gas inlet, wherein the first gas and the second gas are gases with different physical properties; Sampling the mixed gas in the test pipeline through the gas sampling device to obtain sampled gas, wherein the mixed gas comprises the first gas and the second gas; and analyzing the sampling gas through the testing device to obtain a blending gas testing result, wherein the blending gas testing result is used for indicating the blending effect of the first gas and the second gas.
2. The method according to claim 1, wherein the method further comprises: adjusting a pipeline pressure value of the test pipeline, a first gas flow value of the first gas and a second gas flow value of the second gas, wherein the pipeline pressure value is used for indicating the pressure of blending gas in the test pipeline, the first gas flow value is used for indicating the input rate of the first gas, and the second gas flow value is used for indicating the input rate of the second gas; the inputting of the first gas to the test pipe through the first gas inlet and inputting of the second gas to the test pipe through the second gas inlet includes: Inputting the first gas through the first gas inlet at the first gas flow value to the test conduit having the conduit pressure value; The second gas is input to the test conduit having the conduit pressure value through the second gas inlet at the second gas flow value.
3. The method of claim 1, wherein analyzing the sampled gas by the testing device results in a blended gas test result, comprising: Analyzing the sampling gas through the testing device to obtain the actual mixing proportion and layering state of the sampling gas, wherein the layering state is used for indicating the distribution condition of the first gas and the second gas in the radial vertical direction of the testing pipeline; comparing the actual blending proportion with a preset blending proportion to obtain a blending proportion difference value of the sampling gas; And obtaining the blending gas test result based on the blending proportion difference value and the layering state.
4. A method according to claim 3, wherein said analyzing said sampled gas by said testing device to obtain an actual blending ratio of said sampled gas comprises: Performing gas concentration analysis on the sampling gas through the 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 blending proportion based on the first concentration value and the second concentration value.
5. The method according to any one of claims 1 to 4, further comprising: at least one purge of the test tube is performed through the first gas inlet and/or the second gas inlet before the first gas and the second gas are input to the test tube.
6. The method of any one of claims 1 to 4, wherein the blending gas testing system further comprises a venting device comprising a venting valve, a venting riser and a venting riser support, the venting valve being connected to the test pipe and the venting riser, the venting riser support being connected to the venting riser, the method further comprising: And after the blending gas test result is obtained, the emptying device is used for emptying the blending gas in the test pipeline.
7. The method of any one of claims 1 to 4, wherein the first gas is carbon dioxide and the second gas is hydrogen.
8. A mixed gas testing system is characterized by comprising a first air inlet, a second air inlet, a testing pipeline, at least two gas sampling devices and a testing device, wherein the first air inlet and the second air inlet are respectively connected with the testing pipeline, the at least two gas sampling devices are respectively arranged at different pipeline length positions, the at least two gas sampling devices are respectively connected with the testing device, The first gas inlet is used for inputting first gas into the test pipeline, the second gas inlet is used for inputting second gas into the test pipeline, and 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 sampled gas; The testing device analyzes the sampled gas to obtain a blending gas testing result, and the blending gas testing result is used for indicating the blending effect of the first gas and the second gas.
9. A blending gas testing apparatus, said apparatus comprising: the input module is used for inputting first gas to the test pipeline through the first gas inlet and inputting second gas to the test pipeline through the second gas inlet, and the first gas and the second gas are gases with different physical properties; The sampling module is used for sampling the mixed gas in the test pipeline through the gas sampling device to obtain sampled gas, and the mixed gas comprises the first gas and the second gas; And the processing module is used for analyzing the sampling gas through the testing device to obtain a blending gas testing result, and the blending gas testing result is used for indicating the blending effect of the first gas and the second gas.
10. A computer device comprising a processor and a memory, wherein the memory stores at least one computer program, at least one of the computer programs being loaded and executed by the processor to implement the blending gas testing method of any of claims 1-7.

Description

Method, system, device and equipment for testing blending gas Technical Field The application relates to the technical field of pipeline transportation, in particular to a method, a system, a device and equipment for testing blended gas. Background When the gas is transported through the pipeline, in some scenes, at least two kinds of gas are often transported in a mixed mode, and for example, the carbon dioxide and the hydrogen are transported in a mixed mode, so that the energy consumption and the cost of independent transportation can be greatly reduced. In the related art, carbon dioxide and hydrogen are directly mixed and transported in a pipeline. However, since the difference of physical properties of carbon dioxide and hydrogen is remarkable, when mixed transmission is performed in the same pipeline, partial concentration distribution is not uniform and gas layering phenomenon is easy to occur, so that the safety of the pipeline when mixed gas of carbon dioxide and hydrogen is transmitted is affected. Disclosure of Invention The application aims to provide a method, a system, a device and equipment for testing blended gas, which can obtain the mixing uniformity and layering condition of first gas and second gas at different pipeline length positions when mixed gas is conveyed by a pipeline, and further provide data support for a blended gas conveying process and pipe selection protection, so that the safety of the pipeline in conveying the blended gas is improved. In order to achieve the above purpose, the application adopts the following technical scheme: In a first aspect, the application provides a method for testing blended gas, which is applied to a blended gas testing system, wherein the blended gas testing system comprises a first air inlet, a second air inlet, a testing pipeline, at least two gas sampling devices and a testing device, the first air inlet and the second air inlet are respectively connected with the testing pipeline, the at least two gas sampling devices are respectively arranged at different pipeline length positions, and the at least two gas sampling devices are respectively connected with the testing device. The method comprises the following steps: And inputting a first gas to the test pipeline through the first gas inlet, and inputting a second gas to the test pipeline through the second gas inlet, wherein the first gas and the second gas are gases with different physical properties. And sampling the mixed gas in the test pipeline through a gas sampling device to obtain sampled gas, wherein the mixed gas comprises first gas and second gas. And analyzing the sampled gas through a testing device to obtain a blending gas testing result, wherein the blending gas testing result is used for indicating the blending effect of the first gas and the second gas. According to the technical scheme provided by the embodiment of the application, the first gas and the second gas are input into the test pipeline, then the mixed gas in the test pipeline is sampled to obtain the sampled gas, and finally the sampled gas is analyzed to obtain the mixed gas test result, so that the mixing uniformity and layering condition of the first gas and the second gas at different pipeline length positions can be obtained when the first gas and the second gas are mixed and conveyed in the same test pipeline, and further data support is provided for the mixed gas conveying process and the pipe selection protection, and the safety of the mixed gas conveyed by the pipeline is improved. In some embodiments, the blended gas testing method further comprises adjusting a pipeline pressure value of the test pipeline, a first gas flow value of the first gas, and a second gas flow value of the second gas, wherein the pipeline pressure value is used to indicate a pressure when the gas is blended in the test pipeline, the first gas flow value is used to indicate an input rate of the first gas, and the second gas flow value is used to indicate an input rate of the second gas. The first gas is input to the test tube through the first gas inlet and the second gas is input to the test tube through the second gas inlet, and the first gas is input to the test tube with the tube pressure value through the first gas inlet at the first gas flow value. A second gas is input through a second gas inlet to the test tube having a tube pressure value at a second gas flow value. In some embodiments, the sample gas is analyzed by the testing device to obtain the mixed gas testing result, and the method can be specifically realized by analyzing the sample gas by the testing device to obtain the actual mixing proportion and the layering state of the sample gas, wherein the layering state is used for indicating the distribution condition of the first gas and the second gas in the vertical direction in the testing pipeline. And comparing the actual blending proportion with a preset blending proportion to obtain a blending proportion diff