Gas analysis pretreatment and calibration integrated device

Abstract

The invention discloses a gas analysis pretreatment and calibration integrated device, and relates to the technical field of gas analysis, the gas analysis pretreatment and calibration integrated device comprises a sampling filtering assembly, a calibration gas supply assembly and a gas analyzer, the sampling filtering assembly comprises a sampling piece, a sucking pump and a main reversing valve which are connected in sequence, and the calibration gas supply assembly comprises a calibration gas source and a gas supply pipe; the calibration gas source is connected to the main reversing valve through a gas supply pipe and used for providing zero gas and measuring range gas. The gas analyzer is connected with the main reversing valve and can receive zero gas and measuring range gas output by the calibration gas source. The main reversing valve can be switched to cut off the sucking pump and be communicated with the gas supply pipe and the gas analyzer before the gas sample is detected, the calibration gas source can input zero-point gas and range gas to the gas analyzer through the gas supply pipe, the zero-point gas can be used for checking the zero position of the gas analyzer, and the zero position checking accuracy of the gas analyzer is ensured. The measuring range gas can be used for checking the measuring range of the gas analyzer, and reliable support is provided for accurate gas analysis.

Description

Technical Field

[0001] The invention relates to the technical field of gas analysis, and in particular to a gas analysis preprocessing and calibration integrated device. Background Art

[0002] With the rapid development of industrial automation technology, online analyzers have become an indispensable key equipment in gas monitoring. It can accurately analyze various industrial gas samples. The core lies in real-time analysis of mixed gas components and accurate feedback of process control parameters. The accuracy and reliability of its analysis results play a vital role in preventing safety accidents, optimizing production processes, ensuring product quality, and creating a good working environment. As a precision monitoring device, the analyzer has strict requirements on the gas environment. Its accuracy depends entirely on a stable gas environment. It needs to be adjusted to the most suitable state for analysis through a gas pretreatment device system. The gas pretreatment system can coordinate multiple processes such as voltage stabilization, temperature control, drainage, and calibration until it is adjusted to the most suitable state for analysis, and stable and accurate analysis can be performed. Therefore, it is very necessary to pretreat the gas at the front end of the analyzer, which is also a key link to ensure the normal operation of the online analyzer.

[0003] The prior art with the announcement number CN113996129A discloses a residual chlorine absorption exhaust sample pre-treatment device, which includes a sampling chamber, a primary filter installed in the sampling chamber, a sampling probe installed at one end of the primary filter, and a sampling pipeline installed at the other end, the sampling pipeline is sequentially connected with an analysis control cabinet, a sampling valve, a sampling pump, a condensation component and a gas chamber, and the analysis control cabinet is connected with an anti-blocking mechanism connected to the sampling pipeline. The present invention can filter out some solid particulate matter in the gas through the primary filter, and can remove liquid matter in the gas through the condensation component.

[0004] However, the existing gas sample pre-processing device still has defects. For example, it lacks a branch pipeline for verifying the zero position and range of the gas sample analyzer, and cannot calibrate the zero position and range of the gas sample analyzer, so the gas sample analyzer cannot analyze the gas more accurately. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose an integrated gas analysis pretreatment and calibration device to solve the technical problems in the prior art that the gas sample pretreatment device lacks a branch pipeline for verifying the zero position and range of the gas sample analyzer, and cannot calibrate the zero position and range of the gas sample analyzer, and the gas sample analyzer cannot analyze the gas more accurately.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a gas analysis pretreatment and calibration integrated device, comprising: The sampling and filtering assembly comprises a sampling piece, an air pump and a main reversing valve connected in sequence; A calibration gas supply assembly, comprising a calibration gas source and a gas supply pipe, wherein the calibration gas source is connected to the main reversing valve through the gas supply pipe, and the calibration gas source is used to provide zero gas and span gas; and A gas analyzer, wherein the gas inlet end of the gas analyzer is connected to the main reversing valve so as to receive the zero point gas and the span gas output by the calibration gas source through the main reversing valve.

[0007] In some embodiments, the calibration gas source includes a mileage gas container, a zero point gas container, an auxiliary reversing valve, a first branch pipe, a second branch pipe and a main pipe, the two ends of the main pipe are respectively connected to the main reversing valve and the auxiliary reversing valve, one end of the first branch pipe and the second branch pipe are both connected to the auxiliary reversing valve, and the other ends are respectively connected to the mileage gas container and the zero point gas container.

[0008] In some embodiments, the sampling and filtering assembly further includes an oil-water separator, which is disposed between the sampling member and the vacuum pump and is used to filter oily impurities in the gas sample.

[0009] In some embodiments, the sampling and filtering assembly further includes a water mist filter, which is disposed between the oil-water separator and the vacuum pump and is used to filter water mist in the gas sample.

[0010] In some embodiments, the sampling and filtering assembly further includes an electronic condenser, which is disposed between the vacuum pump and the main reversing valve and is used to reduce the temperature of the gas sample to drive the moisture in the gas sample to condense into liquid water.

[0011] In some embodiments, the sampling and filtering assembly further includes a dryer, which is disposed between the electronic condenser and the main reversing valve, and is used to dry the gas sample after condensation by the electronic condenser.

[0012] In some embodiments, the sampling and filtering assembly further includes a drain pipe and a drain valve disposed on the drain pipe, and the drain pipe is connected to the electronic condenser, the water mist filter and the oil-water separator.

[0013] In some embodiments, the sampling and filtering assembly also includes a pressure-stabilizing valve, a pressure-stabilizing tube, an exhaust pipe and an exhaust valve, one end of the pressure-stabilizing tube is connected to the pipeline between the vacuum pump and the electronic condenser, the other end of the pressure-stabilizing tube is connected to the exhaust pipe, the exhaust pipe is connected to the electronic condenser, and the exhaust valve is arranged on the exhaust pipe and is used to control the on and off of the exhaust pipe.

[0014] In some embodiments, the sampling and filtering assembly further includes a flow meter, which is disposed between the main reversing valve and the gas analyzer, and is used to measure and record the flow of the gas sample.

[0015] In some embodiments, the sampling and filtering assembly further comprises a polymer membrane filter, which is disposed between the flow meter and the gas analyzer to remove specific molecules and fine particles in the gas sample.

[0016] Compared with the prior art, the main reversing valve of the integrated gas analysis pretreatment and calibration device provided by the present invention can be switched to the isolation vacuum pump and connected to the gas supply pipe and the gas analyzer before detecting the gas sample. The calibration gas source can input zero gas and span gas to the gas analyzer through the gas supply pipe. The zero gas can be used to verify the zero position of the gas analyzer, ensuring the accuracy of the zero position verification of the gas analyzer and providing guarantee for subsequent accurate analysis. The span gas can be used to verify the range of the gas analyzer. The purity and stability of the span gas effectively guarantee the accuracy of the range verification of the gas analyzer and provide reliable support for accurate gas analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a gas analysis preprocessing and calibration integrated device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problems in the prior art that the gas sample pre-processing device lacks a branch pipeline for verifying the zero position and range of the gas sample analyzer, and the zero position and range of the gas sample analyzer cannot be calibrated, and the gas sample analyzer cannot analyze the gas more accurately, the present invention provides a gas analysis preprocessing and calibration integrated device, which can realize input of zero point gas and span gas to the gas analyzer before analyzing the gas, thereby ensuring the accuracy of the zero position verification of the gas analyzer and providing reliable support for realizing accurate gas analysis.

[0020] See also Figure 1 , Figure 1The present invention is a schematic diagram of the structure of a gas analysis pretreatment and calibration integrated device in one embodiment of the present invention. The gas analysis pretreatment and calibration integrated device includes a sampling filter component, a calibration gas supply component and a gas analyzer 6. The sampling filter component includes a sampling part 1, a vacuum pump 2 and a main reversing valve 3 connected in sequence. The sampling part 1 can be a sampling probe, which is mainly used to collect original gas samples from industrial gas discharge ports or gas pipelines. The collected gas samples (hereinafter referred to as gas samples) are provided to the gas analyzer, thereby realizing accurate measurement of the content, components and concentration of the gas samples.

[0021] The calibration gas supply assembly includes a calibration gas source and a gas supply pipe 5. The calibration gas source is connected to the main reversing valve 3 through the gas supply pipe 5. The calibration gas source is used to provide zero gas and span gas, and the zero gas and span gas are input into the gas analyzer 6 through the gas supply pipe 5. The air pump 2 is mainly used to draw the gas sample into the entire sampling system and flow it. It can also maintain a certain flow rate and pressure, provide power for the entire sampling system, and transport the gas sample from the sampling point to the subsequent gas analyzer 6 according to the pressure requirements and flow requirements of the sampling system.

[0022] The gas analyzer 6 is connected to the main reversing valve 3, and the main reversing valve 3 can switch the gas supply pipe 5 to be connected or disconnected with the gas analyzer 6, and can also switch the vacuum pump 2 to be connected or disconnected with the gas analyzer 6. When the main reversing valve 3 switches the gas supply pipe 5 to be connected with the gas analyzer 6, the calibration gas source can receive the zero gas and the span gas output by the calibration gas source. The zero gas can be used to verify the zero position of the gas analyzer 6, ensuring the accuracy of the zero position verification of the gas analyzer 6, and improving the guarantee for subsequent precise analysis. The span gas can be used to verify the range of the gas analyzer 6. The purity and stability of the span gas effectively guarantee the accuracy of the range verification of the gas analyzer 6, and provide reliable support for accurate gas analysis.

[0023] In one embodiment, see Figure 1 The calibration gas source includes a mileage gas container 41, a zero-point gas container 42, an auxiliary reversing valve 43, a first branch pipe 44, and a second branch pipe 45. The two ends of the gas supply pipe 5 are respectively connected to the main reversing valve 3 and the auxiliary reversing valve 43. One end of the first branch pipe 44 and the second branch pipe 45 are both connected to the auxiliary reversing valve 43. The other ends of the first branch pipe 44 and the second branch pipe 45 are respectively connected to the mileage gas container 41 and the zero-point gas container 42. In this embodiment, the mileage gas container 41 and the zero-point gas container 42 store mileage gas and zero-point gas respectively. The auxiliary reversing valve 43 can control the mileage gas container 41 and the zero-point gas container 42 to output mileage gas and zero-point gas respectively, and input them into the gas analyzer 6 through the gas supply pipe 5 and the main reversing valve 3.

[0024] In one embodiment, see Figure 1The sampling and filtering assembly also includes an oil-water separator 7, which is disposed between the sampling member 1 and the air pump 2. The oil-water separator 7 is used to filter oily impurities in the gas sample. Since the collected gas sample may contain trace amounts of oil and water, these oil and water impurities will interfere with the subsequent analysis of the gas analyzer 6. The oil-water separator 7 effectively separates the oil and water in the gas sample to ensure the purity of the gas sample, providing reliable protection for subsequent accurate analysis.

[0025] In one embodiment, see Figure 1 The sampling and filtering assembly also includes a water mist filter 8, which is arranged between the oil-water separator 7 and the air pump 2, and is used to filter the water mist in the gas sample. The water mist filter 8 is mainly used to completely remove the water mist or tiny water droplets that may remain in the gas sample, to ensure that the subsequent equipment is free from moisture interference, and can effectively prevent moisture and impurities from having adverse effects on the subsequent equipment and measurement results.

[0026] In one embodiment, see Figure 1 The sampling and filtering assembly also includes an electronic condenser 9, which is disposed between the vacuum pump 2 and the main reversing valve 3. The electronic condenser 9 is used to reduce the temperature of the gas sample to drive the moisture in the gas sample to condense into liquid water. The electronic condenser 9 in this embodiment uses electronic refrigeration technology to efficiently reduce the temperature of the gas sample, drive the moisture in the gas sample to condense into liquid water, thereby achieving the removal of moisture in the gas sample, improving the dryness of the gas sample, and providing a clean gas sample for the subsequent gas analyzer 6, achieving the purpose of dehumidification, drying, and temperature control, so as to ensure the accuracy and reliability of the measurement results.

[0027] In one embodiment, see Figure 1 The sampling and filtering assembly further includes a dryer 10, which is disposed between the electronic condenser 9 and the main reversing valve 3. The dryer 10 is used to dry the gas sample after condensation by the electronic condenser 9. The dryer 10 is used to further improve the dryness of the gas sample, and plays a role in secondary filtration and drying, ensuring that the gas sample is in a completely dry state before entering the gas analyzer 6, and effectively avoiding the interference of moisture on the analysis result.

[0028] In one embodiment, see Figure 1 The sampling and filtering assembly further includes a drain pipe 11 and a drain valve 12 disposed on the drain pipe 11. The drain pipe 11 is connected to the electronic condenser 9, the water mist filter 8 and the oil-water separator 7. The drain pipe 11 of this embodiment is used to collect water and oil filtered from the gas sample by the electronic condenser 9, the water mist filter 8 and the oil-water separator 7. When the drain valve 12 is opened, the oil and water collected by the drain pipe 11 can be discharged to prevent the oil and water from circulating in the entire device pipeline.

[0029] In one embodiment, see Figure 1 The sampling and filtering assembly also includes a pressure-stabilizing valve 13, a pressure-stabilizing tube 14, an exhaust pipe 15 and an exhaust valve 16. One end of the pressure-stabilizing tube 14 is connected to the pipeline between the vacuum pump 2 and the electronic condenser 9, and the other end of the pressure-stabilizing tube 14 is connected to the exhaust pipe 15. The exhaust pipe 15 is connected to the electronic condenser 9. The exhaust valve 16 is arranged on the exhaust pipe 15 and is used to control the on-off of the exhaust pipe 15. The pressure-stabilizing valve 13 is used to stabilize the pressure of the gas sample in the device to prevent the composition and state of the gas sample from being affected by pressure fluctuations. In addition, when the device needs to be emptied or maintained, the gas sample or exhaust gas is safely discharged from the device.

[0030] In one embodiment, see Figure 1 The sampling and filtering assembly also includes a flow meter 17, which is arranged between the main reversing valve 3 and the gas analyzer 6. The flow meter 17 is used to measure and record the flow rate of the gas sample. The flow meter 17 is mainly used to measure and record the flow rate of the gas sample. The flow rate is also an important parameter for monitoring and analyzing the gas sample. It is adjusted according to the type of the gas sample, the flow range and the measurement accuracy requirements to achieve the best flow rate and stable flow rate.

[0031] In one embodiment, see Figure 1 The sampling and filtering assembly also includes a polymer membrane filter 18, which is arranged between the flow meter 17 and the gas analyzer 6 to remove specific molecules and fine particles in the gas sample. The polymer membrane filter 18 of this embodiment is a high-precision filtering device, which has a high-efficiency filtering performance, can remove specific molecules and fine particles in the gas, can significantly improve the purity of the gas sample, and thus improve the analysis accuracy, and is a relatively important purification device in the pretreatment link.

[0032] In order to better understand the present invention, the following Figure 1 The technical solution of the present invention is described in detail: The main reversing valve 3 of the integrated gas analysis pretreatment and calibration device provided by the present invention can be switched to the isolation vacuum pump 2 and connected to the gas supply pipe 5 and the gas analyzer 6 before detecting the gas sample. The calibration gas source can input zero gas and span gas to the gas analyzer 6 through the gas supply pipe 5. The zero gas can be used to verify the zero position of the gas analyzer 6, ensuring the accuracy of the zero position verification of the gas analyzer 6, and improving the guarantee for subsequent accurate analysis. The span gas can be used to verify the range of the gas analyzer 6. The purity and stability of the span gas effectively guarantee the accuracy of the range verification of the gas analyzer 6, and provide reliable support for the realization of accurate gas analysis.

[0033] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A gas analysis pretreatment and calibration integrated device, characterized in that: include: The sampling and filtering assembly comprises a sampling piece, an air pump and a main reversing valve connected in sequence; A calibration gas supply assembly, comprising a calibration gas source and a gas supply pipe, wherein the calibration gas source is connected to the main reversing valve through the gas supply pipe, and the calibration gas source is used to provide zero gas and span gas; and A gas analyzer, wherein the gas inlet end of the gas analyzer is connected to the main reversing valve so as to receive the zero point gas and the span gas output by the calibration gas source through the main reversing valve.

2. The integrated gas analysis pretreatment and calibration device according to claim 1, characterized in that: The calibration gas source includes a mileage gas container, a zero point gas container, an auxiliary reversing valve, a first branch pipe, a second branch pipe and a main pipe, the two ends of the main pipe are respectively connected to the main reversing valve and the auxiliary reversing valve, one end of the first branch pipe and the second branch pipe are both connected to the auxiliary reversing valve, and the other ends are respectively connected to the mileage gas container and the zero point gas container.

3. The integrated gas analysis pretreatment and calibration device according to claim 1, characterized in that: The sampling and filtering assembly also includes an oil-water separator, which is arranged between the sampling member and the air pump and is used to filter oily impurities in the gas sample.

4. The integrated gas analysis pretreatment and calibration device according to claim 3, characterized in that: The sampling and filtering assembly also includes a water mist filter, which is arranged between the oil-water separator and the air pump and is used to filter the water mist in the gas sample.

5. The integrated gas analysis pretreatment and calibration device according to claim 4, characterized in that: The sampling and filtering assembly also includes an electronic condenser, which is arranged between the vacuum pump and the main reversing valve and is used to reduce the temperature of the gas sample to drive the moisture in the gas sample to condense into liquid water.

6. The integrated gas analysis pretreatment and calibration device according to claim 5, characterized in that: The sampling and filtering assembly further comprises a dryer, which is arranged between the electronic condenser and the main reversing valve, and is used for drying the gas sample after being condensed by the electronic condenser.

7. The integrated gas analysis pretreatment and calibration device according to claim 5, characterized in that: The sampling and filtering assembly also includes a drain pipe and a drain valve arranged on the drain pipe, and the drain pipe is connected to the electronic condenser, the water mist filter and the oil-water separator.

8. The integrated gas analysis pretreatment and calibration device according to claim 5, characterized in that: The sampling and filtering assembly also includes a pressure-stabilizing valve, a pressure-stabilizing tube, an exhaust pipe and an exhaust valve. One end of the pressure-stabilizing tube is connected to the pipeline between the vacuum pump and the electronic condenser, and the other end of the pressure-stabilizing tube is connected to the exhaust pipe. The exhaust pipe is connected to the electronic condenser. The exhaust valve is arranged on the exhaust pipe and is used to control the on and off of the exhaust pipe.

9. The integrated gas analysis pretreatment and calibration device according to claim 1, characterized in that: The sampling and filtering assembly also includes a flow meter, which is arranged between the main reversing valve and the gas analyzer, and is used to measure and record the flow of the gas sample.

10. The integrated gas analysis pretreatment and calibration device according to claim 9, characterized in that: The sampling and filtering component also includes a polymer membrane filter, which is arranged between the flow meter and the gas analyzer to remove specific molecules and fine particles in the gas sample.

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