A platform for centralized conditioning of analysis gases for air separation plants

Abstract

The application relates to the technical field of air separation detection, and specifically discloses a centralized regulation platform for air separation equipment analysis gas, which comprises a detection pipe group, a damping buffer, a first pressure reducing valve, a first pressure gauge and a first flowmeter which are sequentially arranged on the detection pipe group along a gas flow direction; an inlet of the detection pipe group is connected with a detection port of the air separation equipment, and an outlet of the detection pipe group is connected with a measurement assembly; and the measurement assembly is arranged in a cabinet. In actual use, each detection port in the air separation equipment is connected with the detection pipe group through a stainless steel pipeline and a ditch, and then the outlet end of the detection pipe group is connected with the measurement assembly in the cabinet through a pipeline, so that the detection of different detection points and different projects is realized; the detection pipe group is integrally arranged, and the measurement assembly is arranged in a matched mode, so that the detection of the air separation equipment is more safe and reasonable, and the pipeline detection needs not to be temporarily built, but each detection point and detection project is detected through the detection pipe group, so that the accuracy and comprehensiveness of the detection are ensured.

Description

Technical Field

[0001] This application relates to the field of air separation detection technology, and in particular to a centralized gas regulation platform for air separation equipment. Background Technology

[0002] In the field of industrial gas production, especially in the process of producing oxygen and nitrogen using air separation equipment, real-time monitoring of product quality is directly related to production safety and purity control. Currently, the industry commonly uses instrument gas pipelines connected to online monitoring equipment (including dew point meters, oxygen analyzers, etc.) to continuously monitor parameters such as oxygen content, dew point, and purity of cryogenic products and key gas supply pipelines after the purifier.

[0003] However, existing technologies have certain drawbacks: such as low monitoring reliability; the detection points are scattered (up to 10 locations), and the instrument gas needs to be connected to the monitoring instrument through temporarily laid rubber hoses, which are prone to leaks and unstable pressure, leading to data distortion; the instrument power supply is a temporary installation that does not meet explosion-proof requirements (oxygen environments pose a risk of combustion and explosion), creating a safety hazard; the engineering layout is unreasonable: the monitoring instruments are concentrated in the instrument cabinet in the operating room, with the farthest detection point being 20 meters away, exceeding the optimal response distance of the sensor; except for the 5 detection ports on the air separation tower, the other points are scattered, forcing frequent movement of instruments or extension of temporary pipelines, introducing human error.

[0004] Current improvement solutions mostly focus on enhancing the accuracy of the instruments themselves, while neglecting the core contradiction between the instrument gas path engineering structure and system integration. Therefore, there is an urgent need for an integrated, explosion-proof, safe, short-distance direct-connection instrument gas pipeline system to eliminate the distortion risks caused by temporary pipelines and provide reliable data support for high-purity oxygen and nitrogen production. Utility Model Content

[0005] The purpose of this application is to provide a centralized control platform for analytical gases in air separation equipment in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the technical solution of this application is as follows: A centralized gas control platform for air separation equipment includes a detection tube assembly, which comprises multiple detection lines. Each of the multiple detection lines is equipped with a damping buffer, a first pressure reducing valve, a first pressure gauge, and a first flow meter. The inlet of each detection line is connected to the detection port of the air separation equipment, and the outlet of each detection line is connected to a measurement component. The measuring components are housed within the cabinet.

[0007] Preferably, the detection pipeline further includes a liquid air detection pipeline, and the measurement component includes an oxygen analyzer; The inlet of the liquid air detection pipeline is connected to the outlet of the liquefied air in the air separation unit; the outlet of the liquid air detection pipeline is connected to the oxygen analyzer.

[0008] Preferably, the detection pipeline further includes a liquid oxygen detection pipeline, the inlet of which is connected to the liquid oxygen outlet of the air separation equipment, and the outlet of which is connected to the oxygen analyzer. The liquid oxygen detection pipeline is also equipped with a first booster pump, which is located upstream of the damping buffer.

[0009] Preferably, the detection pipeline further includes a liquid nitrogen detection pipeline, and the measurement component further includes a zirconia oxygen analyzer; The inlet of the liquid nitrogen detection pipeline is connected to the liquid nitrogen outlet of the air separation equipment, and the outlet of the liquid nitrogen detection pipeline is connected to the zirconia oxygen analyzer.

[0010] Preferably, the detection pipeline further includes a first dew point detection pipeline, a second dew point detection pipeline, a third dew point detection pipeline, and a fourth dew point detection pipeline; the measurement component further includes a dew point meter.

[0011] Preferably, the inlet of the first dew point detection line is connected to the inlet of the expander in the air separation unit, and the outlet of the first dew point detection line is connected to the dew point meter; the first dew point detection line is also provided with a second booster pump; the second booster pump is located upstream of the damping buffer; The inlet of the second dew point detection line is connected to the outlet of the expander in the air separation unit, and the outlet of the second dew point detection line is connected to the dew point meter.

[0012] Preferably, the inlet of the third dew point detection pipeline is connected to the pipeline at the outlet of the booster water cooler in the air separation unit, and the outlet of the third dew point detection pipeline is connected to the dew point meter. The inlet of the fourth dew point detection line is connected to the outlet line of the purifier in the air separation unit, and the outlet of the fourth dew point detection line is connected to the dew point meter.

[0013] Preferably, the measuring component further includes a carbon dioxide analyzer; The third dew point detection pipeline is provided with a first branch detection pipeline, and the first branch detection pipeline is provided with a second pressure reducing valve, a second pressure gauge, and a second flow meter in sequence; the inlet end of the first branch detection pipeline is connected between the damping buffer and the first pressure reducing valve in the third dew point detection pipeline; the outlet end of the first branch detection pipeline is connected to the carbon dioxide analyzer. The fourth dew point detection pipeline is provided with a second branch detection pipeline, and the second detection pipeline is provided with a third pressure reducing valve, a third pressure gauge and a third flow meter in sequence; the inlet end of the second branch detection pipeline is connected between the damping buffer and the first pressure reducing valve in the fourth dew point detection pipeline; the outlet end of the second branch detection pipeline is connected to the carbon dioxide analyzer.

[0014] Preferably, the measuring assembly further includes a gas chromatograph; The liquid oxygen detection pipeline is provided with a third branch detection pipeline, and the third branch detection pipeline is provided with a fourth pressure reducing valve, a fourth pressure gauge, and a fourth flow meter in sequence; the inlet end of the third branch detection pipeline is connected between the damping buffer and the first pressure reducing valve in the liquid oxygen detection pipeline; the outlet end of the third branch detection pipeline is connected to the gas chromatograph. The fourth dew point detection pipeline is provided with a fourth branch detection pipeline, and the fourth dew point detection pipeline is provided with a fifth pressure reducing valve, a fifth pressure gauge, and a fifth flow meter in sequence; the inlet end of the fourth dew point detection pipeline is connected between the damping buffer and the first pressure reducing valve in the fourth dew point detection pipeline; the outlet end of the fourth branch detection pipeline is connected to the gas chromatograph.

[0015] Preferably, the inlet end of the detection tube assembly is equipped with a shut-off valve on the pipeline connecting it to the air separation equipment.

[0016] The centralized gas control platform for air separation equipment disclosed in this application connects each detection port in the air separation equipment to a detection tube assembly via stainless steel pipelines through a trench. The outlet of the detection tube assembly is then connected to a measuring component in the cabinet via a pipeline, thereby enabling the detection of different detection points and different items. By integrating the detection tube assembly and the corresponding measuring component, the detection of the air separation equipment becomes safer and more reasonable. There is no need to temporarily build pipelines for detection; instead, the detection tube assembly is used to detect each detection point and item, ensuring the accuracy and comprehensiveness of the detection. Attached Figure Description

[0017] Figure 1 This is a diagram showing the pipeline layout of the testing tube assembly and measurement components in this application; Figure 2 This is a pipeline layout diagram of the air separation equipment in this application.

[0018] In the picture: 1. Detection tubing assembly; 10. Shut-off valve; 11. Liquid air detection tubing; 110. Damping buffer; 111. First pressure reducing valve; 112. First pressure gauge; 113. First flow meter; 12. Liquid oxygen detection tubing; 120. First booster pump; 121. Third branch detection tubing; 122. Fourth pressure reducing valve; 123. Fourth pressure gauge; 124. Fourth flow meter; 13. Liquid nitrogen detection tubing; 14. Second dew point detection tubing; 140. Second booster pump; 15. First dew point detection tubing; 16. Third dew point detection tubing; 160. First branch detection tubing; 161. Second pressure reducing valve; 162, Second pressure gauge; 163, Second flow meter; 17, Fourth dew point detection line; 170, Second branch detection line; 171, Third pressure reducing valve; 172, Third pressure gauge; 173, Third flow meter; 174, Fourth branch detection line; 175, Fifth pressure reducing valve; 176, Fifth pressure gauge; 177, Fifth flow meter; 2. Measuring components; 20, Oxygen analyzer; 21, Zirconia oxygen analyzer; 22, Dew point meter; 23, Carbon dioxide analyzer; 24, Gas chromatograph; 3. Air separation equipment; 30, Water cooler; 31, Expander. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.

[0020] like Figure 1-2 As shown, a centralized gas control platform for air separation equipment includes a detection tube group 1, which includes multiple detection pipelines. Each detection pipeline is equipped with a damping buffer 110, a first pressure reducing valve 111, a first pressure gauge 112, and a first flow meter 113. The inlet of the detection pipeline is connected to the detection port of the air separation equipment 3, and the outlet of the detection pipeline is connected to the measurement component 2.

[0021] Measurement component 2 is installed in the cabinet.

[0022] The damping buffer 110 is used to eliminate fluid pressure fluctuations, significantly improve airflow smoothness, and avoid impact on subsequent instruments.

[0023] The first pressure reducing valve 111 is a precision pressure reducing valve, used to appropriately reduce the pipeline pressure to avoid affecting the subsequent measuring components 2, thereby further ensuring the accuracy of the detection; the first pressure gauge 112 is a precision pressure gauge, used to accurately monitor the pressure changes in the pipeline; the first flow meter 113 is used to detect the pipeline flow.

[0024] In practice, each detection port in the air separation unit 3 is connected to the detection tube group 1 via a stainless steel pipeline through a trench. Then, the outlet end of the detection tube group 1 is connected to the measuring component 2 in the cabinet via a pipeline, thereby realizing the detection of different detection points and different items.

[0025] By integrating the detection tube group 1 and the matching measurement component 2, the detection of the air separation equipment 3 becomes safer and more reasonable. There is no need to temporarily build pipelines for detection. Instead, the detection tube group 1 is used to detect each detection point and item, ensuring the accuracy and comprehensiveness of the detection.

[0026] The damping buffer 110, the first pressure reducing valve 111, the first pressure gauge 112 and the first flow meter 113 are arranged sequentially along the gas flow direction on the detection pipeline.

[0027] In some further embodiments, the detection line also includes a liquid air detection line 11, and the measurement component 2 includes an oxygen analyzer 20; the inlet of the liquid air detection line 11 is connected to the outlet of the liquefied air in the air separation unit 3; and the outlet of the liquid air detection line 11 is connected to the oxygen analyzer 20.

[0028] The liquid air detection line 11 is connected to the outlet of the liquefied air in the air separation unit 3 and is used to monitor the oxygen content of the liquefied air.

[0029] In some further embodiments, the detection line also includes a liquid oxygen detection line 12, the inlet of which is connected to the liquid oxygen outlet on the air separation unit 3, and the outlet of which is connected to the oxygen analyzer 20.

[0030] The liquid oxygen detection pipeline 12 is also equipped with a first booster pump 120, which is located upstream of the damping buffer 110.

[0031] The liquid oxygen detection pipeline 12 is designed specifically for liquid oxygen conditions. It can be made of low-temperature resistant stainless steel and the pipe diameter is adapted to the liquid oxygen flow requirements.

[0032] The first booster pump 120 is located upstream of the damping buffer 110. The first booster pump 120 can be a miniature booster pump, which pre-pressurizes the liquid oxygen to ensure that the liquid oxygen has sufficient pressure before entering the buffer, and avoids cavitation due to insufficient pressure.

[0033] The first booster pump 120 works in conjunction with the damping buffer 110 to maintain a stable flow of liquid oxygen before the subsequent adjustment by the first pressure reducing valve 111, thereby improving the measurement accuracy of the oxygen analyzer 20.

[0034] The oxygen analyzer 20 detects the oxygen content in liquid oxygen in real time through an electrochemical sensor. Its inlet is connected to the outlet of the liquid oxygen detection pipeline 12 through an explosion-proof connector to ensure safety in the oxygen environment.

[0035] Specifically, the oxygen analyzer 20 can be the NK-100A oxygen analyzer 20.

[0036] In some further embodiments, the detection pipeline also includes a liquid nitrogen detection pipeline 13, and the measurement component 2 also includes a zirconia oxygen analyzer 21; the inlet of the liquid nitrogen detection pipeline 13 is connected to the liquid nitrogen outlet on the air separation unit 3, and the outlet of the liquid nitrogen detection pipeline 13 is connected to the zirconia oxygen analyzer 21.

[0037] The zirconia oxygen analyzer 21 detects trace oxygen content in liquid nitrogen by measuring the change in conductivity of the zirconia solid electrolyte at high temperatures. The inlet of the liquid nitrogen detection line 13 is directly connected to the liquid nitrogen outlet of the air separation unit 3, and the outlet can be connected to the analyzer via a short pipe, avoiding temperature rise and composition changes caused by long-distance transmission. This design improves the liquid nitrogen detection response speed, and the zirconia sensor maintains high sensitivity even at low temperatures, ensuring the reliability of the measurement results.

[0038] Specifically, the zirconia oxygen analyzer 21 can be the NK-100ZR zirconia oxygen analyzer 21.

[0039] In some further embodiments, the detection lines also include a first dew point detection line 15, a second dew point detection line 14, a third dew point detection line 16, and a fourth dew point detection line 17; the measurement assembly 2 also includes a dew point meter 22.

[0040] In some further embodiments, the inlet of the first dew point detection line 15 is connected to the inlet of the expander 31 in the air separation unit 3, and the outlet of the first dew point detection line 15 is connected to the dew point meter 22; the first dew point detection line 15 is also provided with a second booster pump 140; the second booster pump 140 is located upstream of the damping buffer 110; the inlet of the second dew point detection line 14 is connected to the outlet of the expander 31 in the air separation unit 3, and the outlet of the second dew point detection line 14 is connected to the dew point meter 22.

[0041] The first dew point detection line 15 is connected to the inlet of the expander 31 to monitor the dew point of the gas before it enters the expander 31; the second dew point detection line 14 is connected to the outlet of the expander 31 to monitor the dew point of the gas after expansion. A second booster pump 140 is located upstream of the damping buffer 110 of the first dew point detection line 15 to pre-pressurize the low-pressure gas, ensuring sufficient pressure stabilization within the buffer. The dew point meter 22 detects the moisture content in the gas using a capacitive sensor, thereby enabling comparative monitoring of the dew point before and after the expander 31. Furthermore, the cooperation between the second booster pump 140 and the damping buffer 110 ensures stable gas flow and improves the measurement accuracy of the dew point meter 22.

[0042] In some further embodiments, the inlet of the third dew point detection line 16 is connected to the outlet of the booster water cooler 30 in the air separation unit 3, and the outlet of the third dew point detection line 16 is connected to the dew point meter 22; the inlet of the fourth dew point detection line 17 is connected to the outlet of the purifier in the air separation unit 3, and the outlet of the fourth dew point detection line 17 is connected to the dew point meter 22.

[0043] The third dew point detection line 16 is connected to the outlet of the booster water cooler 30 and is used to monitor the dew point of the cooled gas. The dew point meter 22 is directly connected to the outlet of the detection line through a pipeline to ensure that the temperature change of the gas is minimized during transmission.

[0044] The fourth dew point detection line 17 connects to the purifier outlet and is used to monitor the dew point of the purified gas. This line can be made of corrosion-resistant material to withstand the trace impurities that may be present at the purifier outlet. The dew point meter 22 is connected to the detection line outlet via a short, rigid tube to ensure that the gas is not contaminated during transmission. This design makes the dew point detection at the purifier outlet more reliable, and the integrated pipeline layout reduces the use of temporary pipelines, improving system safety.

[0045] In some further embodiments, the measuring component 2 also includes a carbon dioxide analyzer 23.

[0046] The third dew point detection line 16 is provided with a first branch detection line 160. The first branch detection line 160 is provided with a second pressure reducing valve 161, a second pressure gauge 162, and a second flow meter 163 in sequence. The inlet end of the first branch detection line 160 is connected between the damping buffer 110 and the first pressure reducing valve 111 in the third dew point detection line 16. The outlet end of the first branch detection line 160 is connected to the carbon dioxide analyzer 23.

[0047] The fourth dew point detection line 17 is equipped with a second branch detection line 170. The second detection line is equipped with a third pressure reducing valve 171, a third pressure gauge 172, and a third flow meter 173 in sequence. The inlet end of the second branch detection line 170 is connected between the damping buffer 110 and the first pressure reducing valve 111 in the fourth dew point detection line 17. The outlet end of the second branch detection line 170 is connected to the carbon dioxide analyzer 23.

[0048] The third dew point detection line 16 is connected to the carbon dioxide analyzer 23 via the first branch detection line 160. A second pressure reducing valve 161, a second pressure gauge 162, and a second flow meter 163 are sequentially installed on the branch line to regulate the gas pressure and flow rate entering the analyzer, ensuring that the analyzer operates under optimal conditions. The fourth dew point detection line 17 is connected to the carbon dioxide analyzer 23 in the same manner via the second branch detection line 170.

[0049] The carbon dioxide analyzer 23 can employ a non-dispersive infrared sensor to calculate the carbon dioxide content by detecting the amount of infrared light absorbed by the gas at a specific wavelength. This design allows carbon dioxide detection and dew point detection to share a main pipeline, reducing pipeline complexity, and the adjustment devices on the corresponding branches ensure the analyzer's measurement accuracy.

[0050] In some further embodiments, the measurement component 2 also includes a gas chromatograph 24.

[0051] The liquid oxygen detection line 12 is provided with a third branch detection line 121. The third branch detection line 121 is provided with a fourth pressure reducing valve 122, a fourth pressure gauge 123, and a fourth flow meter 124 in sequence. The inlet end of the third branch detection line 121 is connected between the damping buffer 110 and the first pressure reducing valve 111 in the liquid oxygen detection line 12. The outlet end of the third branch detection line 121 is connected to the gas chromatograph 24.

[0052] The fourth dew point detection line 17 is provided with a fourth branch detection line 174. The fourth dew point detection line 17 is provided with a fifth pressure reducing valve 175, a fifth pressure gauge 176, and a fifth flow meter 177 in sequence. The inlet end of the fourth dew point detection line 17 is connected between the damping buffer 110 and the first pressure reducing valve 111 in the fourth dew point detection line 17. The outlet end of the fourth branch detection line 174 is connected to the gas chromatograph 24.

[0053] Liquid oxygen detection line 12 is connected to gas chromatograph 24 via third branch detection line 121. A fourth pressure reducing valve 122, a fourth pressure gauge 123, and a fourth flow meter 124 are sequentially installed on the third branch to regulate the gas parameters entering the gas chromatograph 24. Fourth dew point detection line 17 is connected to gas chromatograph 24 in the same manner via fourth branch detection line 174.

[0054] In some other embodiments, the gas chromatograph 24 separates gas components via a chromatographic column and uses a thermal conductivity detector or a flame ionization detector to quantitatively analyze the content of each component. This design enables the gas chromatograph 24 to simultaneously analyze the components of liquid oxygen and purified gas, and the adjustment devices on the corresponding branches ensure the injection stability of the gas chromatograph 24, improving the reliability of the analytical results.

[0055] It should be noted that the oxygen analyzer 20, zirconia oxygen analyzer 21, dew point meter 22, carbon dioxide analyzer 23, and gas chromatograph 24 are widely used in industry and are existing technologies. Their specific structures and working principles will not be described in this embodiment.

[0056] In some further embodiments, a shut-off valve 10 is provided on the pipeline connecting the inlet end of the detection tube assembly 1 to the air separation unit 3.

[0057] Each pipeline connecting the inlet of the detection tube assembly 1 to the air separation unit 3 is equipped with a shut-off valve 10 to facilitate quick cut-off of the gas supply during maintenance. This design makes the entire platform explosion-proof, integrated, and easy to maintain, and the installation of the shut-off valve 10 improves the system's safety and operability.

[0058] It should be noted that a heating device is provided on the section of the liquid air detection pipeline 11, the liquid oxygen detection pipeline 12, the liquid nitrogen detection pipeline 13, and the third branch detection pipeline 121 near the measuring component 2. The heating device can be a heating tape wrapped around the outside of the pipeline to ensure that the component to be detected entering the measuring component is in a gaseous state.

[0059] The heating device is located in the cabinet where the measuring components are installed.

[0060] Heat tracing cables are widely used in industrial and chemical pipeline heating fields. As they are existing technologies, their structure and working principle will not be described in detail in this embodiment.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A centralized control platform for analytical gases in air separation equipment, characterized in that, The system includes a detection tube assembly (1), which includes multiple detection lines. Each of the multiple detection lines is equipped with a damping buffer (110), a first pressure reducing valve (111), a first pressure gauge (112), and a first flow meter (113). The inlet of each detection line is connected to the detection port of the air separation unit (3), and the outlet of each detection line is connected to the measurement component (2). The measuring component (2) is installed in the cabinet.

2. The centralized control platform for analytical gas in air separation equipment according to claim 1, characterized in that, The detection pipeline also includes a liquid air detection pipeline (11), and the measurement component (2) includes an oxygen analyzer (20). The inlet of the liquid air detection line (11) is connected to the outlet of the liquefied air in the air separation unit (3); the outlet of the liquid air detection line (11) is connected to the oxygen analyzer (20).

3. The centralized control platform for analytical gas in air separation equipment according to claim 2, characterized in that, The detection pipeline also includes a liquid oxygen detection pipeline (12), the inlet of which is connected to the liquid oxygen outlet on the air separation unit (3), and the outlet of which is connected to the oxygen analyzer (20). The liquid oxygen detection pipeline (12) is also equipped with a first booster pump (120), which is located upstream of the damping buffer (110).

4. The centralized control platform for analytical gas in air separation equipment according to claim 1, characterized in that, The detection pipeline also includes a liquid nitrogen detection pipeline (13), and the measurement component (2) also includes a zirconium oxide oxygen analyzer (21). The inlet of the liquid nitrogen detection pipeline (13) is connected to the liquid nitrogen outlet on the air separation unit (3), and the outlet of the liquid nitrogen detection pipeline (13) is connected to the zirconia oxygen analyzer (21).

5. The centralized control platform for analytical gas in air separation equipment according to claim 3, characterized in that, The detection pipeline also includes a first dew point detection pipeline (15), a second dew point detection pipeline (14), a third dew point detection pipeline (16), and a fourth dew point detection pipeline (17); the measurement component (2) also includes a dew point meter (22).

6. The centralized control platform for analytical gas in air separation equipment according to claim 5, characterized in that, The inlet of the first dew point detection line (15) is connected to the inlet of the expander (31) in the air separation unit (3), and the outlet of the first dew point detection line (15) is connected to the dew point meter (22); a second booster pump (140) is also provided on the first dew point detection line (15); the second booster pump (140) is located upstream of the damping buffer (110); The inlet of the second dew point detection line (14) is connected to the outlet of the expander (31) in the air separation unit (3), and the outlet of the second dew point detection line (14) is connected to the dew point meter (22).

7. The centralized control platform for analytical gas in air separation equipment according to claim 5, characterized in that, The inlet of the third dew point detection pipeline (16) is connected to the pipeline at the outlet of the booster water cooler (30) in the air separation unit (3), and the outlet of the third dew point detection pipeline (16) is connected to the dew point meter (22). The inlet of the fourth dew point detection line (17) is connected to the outlet of the purifier in the air separation unit (3), and the outlet of the fourth dew point detection line (17) is connected to the dew point meter (22).

8. The centralized control platform for analytical gas in air separation equipment according to claim 7, characterized in that, The measurement component (2) also includes a carbon dioxide analyzer (23); The third dew point detection pipeline (16) is provided with a first branch detection pipeline (160), and the first branch detection pipeline (160) is provided with a second pressure reducing valve (161), a second pressure gauge (162), and a second flow meter (163) in sequence; the inlet end of the first branch detection pipeline (160) is connected between the damping buffer (110) and the first pressure reducing valve (111) in the third dew point detection pipeline (16); the outlet end of the first branch detection pipeline (160) is connected to the carbon dioxide analyzer (23). The fourth dew point detection pipeline (17) is provided with a second branch detection pipeline (170), and the second branch detection pipeline (170) is provided with a third pressure reducing valve (171), a third pressure gauge (172), and a third flow meter (173) in sequence; the inlet end of the second branch detection pipeline (170) is connected between the damping buffer (110) and the first pressure reducing valve (111) in the fourth dew point detection pipeline (17); the outlet end of the second branch detection pipeline (170) is connected to the carbon dioxide analyzer (23).

9. The centralized control platform for analytical gas in air separation equipment according to claim 5, characterized in that, The measurement component (2) also includes a gas chromatograph (24); The liquid oxygen detection pipeline (12) is provided with a third branch detection pipeline (121), and the third branch detection pipeline (121) is provided with a fourth pressure reducing valve (122), a fourth pressure gauge (123), and a fourth flow meter (124) in sequence; the inlet end of the third branch detection pipeline (121) is connected between the damping buffer (110) and the first pressure reducing valve (111) in the liquid oxygen detection pipeline (12); the outlet end of the third branch detection pipeline (121) is connected to the gas chromatograph (24). The fourth dew point detection line (17) is provided with a fourth branch detection line (174), and the fourth dew point detection line (17) is provided with a fifth pressure reducing valve (175), a fifth pressure gauge (176), and a fifth flow meter (177) in sequence; the inlet end of the fourth dew point detection line (17) is connected between the damping buffer (110) and the first pressure reducing valve (111) in the fourth dew point detection line (17); the outlet end of the fourth branch detection line (174) is connected to the gas chromatograph (24).

10. The centralized control platform for analytical gas in an air separation unit according to any one of claims 1 to 9, characterized in that, The inlet end of the detection tube assembly (1) is equipped with a shut-off valve (10) on the pipeline connecting it to the air separation equipment (3).

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