Method for detecting gas concentration of logging equipment

Abstract

The invention relates to the technical field of detection methods, in particular to a logging equipment gas concentration detection method which comprises the following steps: SI, detection preparation and primary treatment; s2, flow measurement and flow path control; s3, standard gas is introduced, and a gas path is cleaned; s4, pressure control and output; according to the detection method, by using the flow sensor and the needle valve, the flow of air entering the detection system can be accurately controlled, it is ensured that the air enters the detection system at a constant flow, and therefore detection errors caused by flow fluctuation are reduced, hydrocarbon compounds and moisture in the air are effectively removed by introducing the hydrocarbon remover and the dryer, and the detection accuracy is improved. The method avoids the influence of the impurities on the detection result, can adapt to the detection requirements of different gases through the steps of standard gas introduction and gas path cleaning, also can quickly calibrate and verify the accuracy of the detection system, greatly reduces the time required for calibration and verification, also can avoid cross contamination, and improves the detection efficiency. And the long-term stable operation of the detection system is ensured.

Description

Technical Field

[0001] This invention relates to the field of detection methods, and in particular to a method for detecting gas concentration in logging equipment. Background Technology

[0002] The gas concentration detection methods of commercially available logging equipment require manual operation and intervention, including manually adjusting parameters such as flow rate and temperature. This increases the complexity of operation and the risk of human error, and also makes the detection time longer.

[0003] Traditional logging equipment cannot automatically output different standard gases at constant pressure when detecting gas concentrations. This prevents it from quickly comparing the concentration of the standard gases with the output of the detection system, thus reducing the accuracy of calibration and verification. Rapidly outputting different standard gases at constant pressure can significantly shorten the calibration and verification time of the detection system, thereby improving the efficiency of the entire detection process. This helps exploration teams obtain gas concentration data more quickly, enabling timely decision-making and adjustments. Furthermore, logging operations involve the detection of various gases, including methane, ethane, and carbon dioxide. Rapidly outputting different standard gases at constant pressure can adapt to the detection needs of different gases, ensuring that the detection system can accurately identify and measure the concentration of various gases.

[0004] Therefore, to address the problem that traditional logging equipment cannot automatically output different standard gases at constant pressure when detecting gas concentration, thus preventing it from quickly comparing the concentration of the standard gas with the output results of the detection system, a gas concentration detection method for logging equipment can be designed that can quickly output different standard gases at constant pressure to meet the detection needs of different gases. Summary of the Invention

[0005] To overcome the problem that traditional logging equipment cannot quickly and automatically output different standard gases at constant pressure when detecting gas concentration.

[0006] The technical solution of this invention is: a method for detecting gas concentration in logging equipment, the steps of which are as follows: SI: Detection Preparation and Preliminary Processing S11: Air extraction process Start the professional air pump to introduce outside air into the detection system, and then use a needle valve to adjust the air flow rate so that the air with a certain flow rate can enter the subsequent processing device at a stable flow rate, with the flow rate range between 5 and 1000 ml / min. S12: Hydrocarbon removal treatment Plug the power cord of the hydrocarbon remover into the power socket and turn on the power switch. According to the experimental or production needs, set the target catalytic temperature to 300°C on the control panel, turn on the heating furnace, and gradually raise the internal temperature of the equipment to 300°C and keep it stable. When the heating furnace temperature reaches the set 300°C and stabilizes, open the gas source valve and adjust the gas flow to the set value so that the air enters the hydrocarbon remover. The air undergoes catalytic cracking reaction inside the hydrocarbon remover, which can remove hydrocarbons from the air and prevent hydrocarbon compounds from interfering with subsequent detection steps. S13: Monitoring and Adjustment Use a gas chromatograph to regularly monitor the hydrocarbon concentration in the output gas to ensure that the hydrocarbon removal requirements are met. If the hydrocarbon concentration in the output gas is found to be ≥0, the catalytic parameters of the hydrocarbon remover need to be adjusted in time, including increasing the amount of catalyst and appropriately increasing the temperature of the heating furnace. S14: Drying treatment The air after hydrocarbon removal is introduced into the dryer. The air source valve is opened and the air flow rate is adjusted to the set value. The air comes into contact with the silica gel inside the dryer to remove the moisture and prevent the moisture from affecting the test results. S15: Dust Filter Silica gel filtration produces some dust, so passing the dehydrated air into the filter can remove dust and particulate matter from the air and protect the subsequent detection equipment from contamination. S2: Flow Measurement and Flow Path Control S21: Flow Measurement Using a flow sensor to accurately measure the airflow through the filtered air ensures that air enters the detection system at a constant flow rate, thereby improving the accuracy of the detection. S22: Flow path control Using a two-position three-way valve to switch flow paths between different detection steps allows for precise control of airflow, ensuring that air can enter a specific detection device or be vented when needed. S3: Standard air intake and air circuit cleaning S31: Standard air supply Different standard gases, including standard gas 1 to standard gas 11, are introduced in a predetermined sequence using a twelve-in-one-out valve. S32: Gas line cleaning After each standard gas is introduced, air is introduced at a certain interval before the next standard gas is introduced to purge the gas path, prevent cross-contamination between standard gases, and ensure the accuracy of subsequent tests. S4: Pressure Control and Output S41: Pressure Measurement and Regulation Using a pressure sensor can accurately measure the pressure of the aforementioned standard gas and air, while using a pressure controller can adjust the pressure to ensure a constant pressure output, thereby ensuring that the detection system operates under stable pressure, thus improving the accuracy and reliability of the detection.

[0007] Preferably, the operating environment temperature in S12 is between -20℃ and 40℃, and the humidity is below 85%.

[0008] Preferably, the gas flow rate setting value in S12 is between 5 and 1000 ml / min.

[0009] Preferably, in S14, a humidity sensor is used to monitor the humidity of the output gas in real time and display the value on the display screen. When the humidity exceeds the set value, an alarm is automatically issued, and the air that does not meet the dehumidification standard is recirculated into the dryer until the moisture is completely removed.

[0010] Preferably, the filter in S15 can be a HEPA filter or a particulate filter.

[0011] Preferably, the air flow rate in S21 is between 5 and 1000 ml / min.

[0012] Preferably, the transition time in S22 is ≤1 second to ensure rapid switching between different detection steps.

[0013] Preferably, the gas path cleaning time in S32 is ≥30 seconds to ensure that the gas path is thoroughly cleaned.

[0014] The beneficial effects of this invention are: 1. The detection method of this invention uses a flow sensor and a needle valve to precisely control the air flow entering the detection system, ensuring a constant air flow and reducing detection errors caused by flow fluctuations. The introduction of a hydrocarbon remover and dryer effectively removes hydrocarbon compounds and moisture from the air, preventing these impurities from affecting the detection results and further improving accuracy. The use of a pressure sensor and pressure controller enables precise measurement and adjustment of the standard gas and air pressure, ensuring the detection system operates under stable pressure and reducing the impact of pressure fluctuations on the results. Through standard gas introduction and gas path cleaning steps, it can adapt to the detection needs of different gases and quickly calibrate and verify the accuracy of the detection system, greatly reducing the time required for calibration and verification, thereby improving overall detection efficiency. Simultaneously, it avoids cross-contamination and ensures the long-term stable operation of the detection system. Attached Figure Description

[0015] Figure 1 The diagram shown is a gas path diagram of a gas concentration detection method for logging equipment according to the present invention. Figure 2 The diagram shown is a standard sample selection gas path diagram for a gas concentration detection method for logging equipment according to the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please see Figure 1 The present invention provides an embodiment: a method for detecting gas concentration in logging equipment, the steps of which are as follows: SI: Detection Preparation and Preliminary Processing S11: Air extraction process Start the professional air pump to introduce outside air into the detection system, and then use a needle valve to adjust the air flow rate so that the air with a certain flow rate can enter the subsequent processing device at a stable flow rate, with the flow rate range between 5 and 1000 ml / min. S12: Hydrocarbon removal treatment Plug the power cord of the hydrocarbon remover into the power socket and turn on the power switch. According to the experimental or production needs, set the target catalytic temperature to 300°C on the control panel, turn on the heating furnace, and gradually raise the internal temperature of the equipment to 300°C and keep it stable. When the heating furnace temperature reaches the set 300°C and stabilizes, open the gas source valve and adjust the gas flow to the set value so that the air enters the hydrocarbon remover. The air undergoes catalytic cracking reaction inside the hydrocarbon remover, which can remove hydrocarbons from the air and prevent hydrocarbon compounds from interfering with subsequent detection steps. S13: Monitoring and Adjustment Use a gas chromatograph to regularly monitor the hydrocarbon concentration in the output gas to ensure that the hydrocarbon removal requirements are met. If the hydrocarbon concentration in the output gas is found to be ≥0, the catalytic parameters of the hydrocarbon remover need to be adjusted in time, including increasing the amount of catalyst and appropriately increasing the temperature of the heating furnace. S14: Drying treatment The air after hydrocarbon removal is introduced into the dryer. The air source valve is opened and the air flow rate is adjusted to the set value. The air comes into contact with the silica gel inside the dryer to remove the moisture and prevent the moisture from affecting the test results. S15: Dust Filter Silica gel filtration produces some dust, so passing the dehydrated air into the filter can remove dust and particulate matter from the air and protect the subsequent detection equipment from contamination. S2: Flow Measurement and Flow Path Control S21: Flow Measurement Using a flow sensor to accurately measure the airflow through the filtered air ensures that air enters the detection system at a constant flow rate, thereby improving the accuracy of the detection. S22: Flow path control Using a two-position three-way valve to switch flow paths between different detection steps allows for precise control of airflow, ensuring that air can enter a specific detection device or be vented when needed. S3: Standard air intake and air circuit cleaning S31: Standard air supply Different standard gases, including standard gas 1 to standard gas 11, are introduced in a predetermined sequence using a twelve-in-one-out valve. S32: Gas line cleaning After each standard gas is introduced, air is introduced at a certain interval before the next standard gas is introduced to purge the gas path, prevent cross-contamination between standard gases, and ensure the accuracy of subsequent tests. S4: Pressure Control and Output S41: Pressure Measurement and Regulation Using a pressure sensor can accurately measure the pressure of the aforementioned standard gas and air, while using a pressure controller can adjust the pressure to ensure a constant pressure output, thereby ensuring that the detection system operates under stable pressure, thus improving the accuracy and reliability of the detection.

[0018] Example 1 The process using this technical solution involves the following steps: SI: Detection Preparation and Preliminary Processing S11: Air extraction process Start the professional air pump to introduce outside air into the detection system, and then use a needle valve to adjust the air flow rate so that the air with a certain flow rate can enter the subsequent processing device at a stable flow rate, with the flow rate range between 5 and 1000 ml / min. S12: Hydrocarbon removal treatment Plug the power cord of the hydrocarbon remover into the power socket and turn on the power switch. According to the experimental or production needs, set the target catalytic temperature to 300℃ on the control panel, turn on the heating furnace, and gradually raise the internal temperature of the equipment to 300℃ and keep it stable. When the heating furnace temperature reaches the set 300℃ and stabilizes, open the gas source valve and adjust the gas flow rate to the set value so that the air enters the hydrocarbon remover. The air undergoes catalytic cracking reaction inside the hydrocarbon remover, which can remove hydrocarbons from the air and prevent hydrocarbon compounds from interfering with subsequent detection steps. The operating environment temperature is between -20℃ and 40℃, the humidity is below 85%, and the gas flow rate setting value is between 5 and 1000 ml / min. S13: Monitoring and Adjustment Use a gas chromatograph to regularly monitor the hydrocarbon concentration in the output gas to ensure that the hydrocarbon removal requirements are met. If the hydrocarbon concentration in the output gas is found to be ≥0, the catalytic parameters of the hydrocarbon remover need to be adjusted in time, including increasing the amount of catalyst and appropriately increasing the temperature of the heating furnace. S14: Drying treatment The air after hydrocarbon removal is introduced into the dryer. The air source valve is opened and the air flow rate is adjusted to the set value. The air comes into contact with the silica gel inside the dryer to remove the moisture and prevent the moisture from affecting the test results. At the same time, a humidity sensor is used to monitor the humidity of the output gas in real time and the value is displayed on the screen. When the humidity exceeds the set value, an alarm is automatically issued and the air that does not meet the dehumidification standard is recirculated into the dryer until the moisture is completely removed. S15: Dust Filter Silica gel filtration produces some dust, so passing the dehydrated air into the filter can remove dust and particulate matter from the air and protect the subsequent detection equipment from contamination. The filter can be a HEPA filter or a particulate filter. S2: Flow Measurement and Flow Path Control S21: Flow Measurement A flow sensor is used to accurately measure the airflow rate of filtered air, ensuring that air enters the detection system at a constant flow rate, thereby improving the accuracy of the detection. The airflow rate range is between 5 and 1000 ml / min. S22: Flow path control A two-position three-way valve is used to switch the flow path so as to switch between different detection steps. It can precisely control the air flow direction and ensure that it can enter the specific detection device or be vented when needed. The switching time is ≤1 second to ensure rapid switching between different detection steps. S3: Standard air intake and air circuit cleaning S31: Standard air supply Different standard gases 1 are introduced in a predetermined sequence using the twelve-in-one-out valve. The standard gases include standard gas 1 to standard gas 11. S32: Gas line cleaning After standard gas 1 is introduced, and before standard gas 2 is introduced, air is introduced at a certain interval to clean the gas path, prevent cross-contamination between standard gases, and ensure the accuracy of subsequent tests. The gas path cleaning time is ≥30 seconds to ensure that the gas path is thoroughly cleaned. S4: Pressure Control and Output S41: Pressure Measurement and Regulation Using a pressure sensor can accurately measure the pressure of the aforementioned standard gas and air, while using a pressure controller can adjust the pressure to ensure a constant pressure output, thereby ensuring that the detection system operates under stable pressure, thus improving the accuracy and reliability of the detection.

[0019] Example 2 The process using this technical solution involves the following steps: SI: Detection Preparation and Preliminary Processing S11: Air extraction process Start the professional air pump to introduce outside air into the detection system, and then use a needle valve to adjust the air flow rate so that the air with a certain flow rate can enter the subsequent processing device at a stable flow rate, with the flow rate range between 5 and 1000 ml / min. S12: Hydrocarbon removal treatment Plug the power cord of the hydrocarbon remover into the power socket and turn on the power switch. According to the experimental or production needs, set the target catalytic temperature to 300℃ on the control panel, turn on the heating furnace, and gradually raise the internal temperature of the equipment to 300℃ and keep it stable. When the heating furnace temperature reaches the set 300℃ and stabilizes, open the gas source valve and adjust the gas flow rate to the set value so that the air enters the hydrocarbon remover. The air undergoes catalytic cracking reaction inside the hydrocarbon remover, which can remove hydrocarbons from the air and prevent hydrocarbon compounds from interfering with subsequent detection steps. The operating environment temperature is between -20℃ and 40℃, the humidity is below 85%, and the gas flow rate setting value is between 5 and 1000 ml / min. S13: Monitoring and Adjustment Use a gas chromatograph to regularly monitor the hydrocarbon concentration in the output gas to ensure that the hydrocarbon removal requirements are met. If the hydrocarbon concentration in the output gas is found to be ≥0, the catalytic parameters of the hydrocarbon remover need to be adjusted in time, including increasing the amount of catalyst and appropriately increasing the temperature of the heating furnace. S14: Drying treatment The air after hydrocarbon removal is introduced into the dryer. The air source valve is opened and the air flow rate is adjusted to the set value. The air comes into contact with the silica gel inside the dryer to remove the moisture and prevent the moisture from affecting the test results. At the same time, a humidity sensor is used to monitor the humidity of the output gas in real time and the value is displayed on the screen. When the humidity exceeds the set value, an alarm is automatically issued and the air that does not meet the dehumidification standard is recirculated into the dryer until the moisture is completely removed. S15: Dust Filter Silica gel filtration produces some dust, so passing the dehydrated air into the filter can remove dust and particulate matter from the air and protect the subsequent detection equipment from contamination. The filter can be a HEPA filter or a particulate filter. S2: Flow Measurement and Flow Path Control S21: Flow Measurement A flow sensor is used to accurately measure the airflow rate of filtered air, ensuring that air enters the detection system at a constant flow rate, thereby improving the accuracy of the detection. The airflow rate range is between 5 and 1000 ml / min. S22: Flow path control A two-position three-way valve is used to switch the flow path so as to switch between different detection steps. It can precisely control the air flow direction and ensure that it can enter the specific detection device or be vented when needed. The switching time is ≤1 second to ensure rapid switching between different detection steps. S3: Standard air intake and air circuit cleaning S31: Standard air supply Different standard gases 3 are introduced in a predetermined sequence using the twelve-in-one-out valve. The standard gases include standard gas 1 to standard gas 11. S32: Gas line cleaning After standard gas 3 is introduced, and before standard gas 4 is introduced, air is introduced at a certain interval to clean the gas path, prevent cross-contamination between standard gases, and ensure the accuracy of subsequent tests. The gas path cleaning time is ≥30 seconds to ensure that the gas path is thoroughly cleaned. S4: Pressure Control and Output S41: Pressure Measurement and Regulation Using a pressure sensor can accurately measure the pressure of the aforementioned standard gas and air, while using a pressure controller can adjust the pressure to ensure a constant pressure output, thereby ensuring that the detection system operates under stable pressure, thus improving the accuracy and reliability of the detection.

[0020] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for detecting gas concentration in logging equipment, characterized in that, The steps are as follows: SI: Detection Preparation and Preliminary Processing S11: Air extraction process Start the professional air pump to introduce outside air into the detection system, and then use a needle valve to adjust the air flow rate so that the air with a certain flow rate can enter the subsequent processing device at a stable flow rate, with the flow rate range between 5 and 1000 ml / min. S12: Hydrocarbon removal treatment Plug the power cord of the hydrocarbon remover into the power socket and turn on the power switch. According to the experimental or production needs, set the target catalytic temperature to 300°C on the control panel, turn on the heating furnace, and gradually raise the internal temperature of the equipment to 300°C and keep it stable. When the heating furnace temperature reaches the set 300°C and stabilizes, open the gas source valve and adjust the gas flow to the set value so that the air enters the hydrocarbon remover. The air undergoes catalytic cracking reaction inside the hydrocarbon remover, which can remove hydrocarbons from the air and prevent hydrocarbon compounds from interfering with subsequent detection steps. S13: Monitoring and Adjustment Use a gas chromatograph to regularly monitor the hydrocarbon concentration in the output gas to ensure that the hydrocarbon removal requirements are met. If the hydrocarbon concentration in the output gas is found to be ≥0, the catalytic parameters of the hydrocarbon remover need to be adjusted in time, including increasing the amount of catalyst and appropriately increasing the temperature of the heating furnace. S14: Drying treatment The air after hydrocarbon removal is introduced into the dryer. The air source valve is opened and the air flow rate is adjusted to the set value. The air comes into contact with the silica gel inside the dryer to remove the moisture and prevent the moisture from affecting the test results. S15: Dust Filter Silica gel filtration produces some dust, so passing the dehydrated air into the filter can remove dust and particulate matter from the air and protect the subsequent detection equipment from contamination. S2: Flow Measurement and Flow Path Control S21: Flow Measurement Using a flow sensor to accurately measure the airflow through the filtered air ensures that air enters the detection system at a constant flow rate, thereby improving the accuracy of the detection. S22: Flow path control Using a two-position three-way valve to switch flow paths between different detection steps allows for precise control of airflow, ensuring that air can enter a specific detection device or be vented when needed. S3: Standard air intake and air circuit cleaning S31: Standard air supply Different standard gases, including standard gas 1 to standard gas 11, are introduced in a predetermined sequence using a twelve-in-one-out valve. S32: Gas line cleaning After each standard gas is introduced, air is introduced at a certain interval before the next standard gas is introduced to purge the gas path, prevent cross-contamination between standard gases, and ensure the accuracy of subsequent tests. S4: Pressure Control and Output S41: Pressure Measurement and Regulation Using a pressure sensor can accurately measure the pressure of the aforementioned standard gas and air, while using a pressure controller can adjust the pressure to ensure a constant pressure output, thereby ensuring that the detection system operates under stable pressure, thus improving the accuracy and reliability of the detection.

2. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The operating environment temperature in S12 is between -20℃ and 40℃, and the humidity is below 85%.

3. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The gas flow rate setting in S12 is between 5 and 1000 ml / min.

4. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The S14 uses a humidity sensor to monitor the humidity of the output gas in real time and displays the value on the screen. When the humidity exceeds the set value, an alarm is automatically issued, and the air that does not meet the dehumidification standard is recirculated into the dryer until the moisture is completely removed.

5. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The filter in S15 can be a HEPA filter or a particulate filter.

6. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The air flow rate in S21 ranges from 5 to 1000 ml / min.

7. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The transition time in S22 is ≤1 second to ensure rapid switching between different detection steps.

8. The method for detecting gas concentration in logging equipment according to claim 1, characterized in that: The gas path cleaning time in S32 is ≥30 seconds to ensure that the gas path is thoroughly cleaned.

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