Natural gas energy metering device

Abstract

The invention belongs to the technical field of natural gas measurement, particularly provides a metering device capable of realizing high-precision natural gas metering and effectively compensating environmental interference, and particularly relates to a natural gas energy metering device. The device mainly comprises a front-end rectification unit, a flow metering unit, a component analysis unit, an environmental parameter monitoring and compensation unit and a data processing and control unit. The front-end rectification unit stabilizes gas flow and improves measurement precision, the flow metering unit accurately measures flow data and adjusts gas flow and pressure in a pipeline in real time according to feedback signals, the component analysis unit analyzes components and transmits data in real time, and the environmental parameter monitoring and compensating unit collects environmental parameters in real time and corrects metering data. The device can effectively reduce gas flow and environmental interference, improve the metering precision and meet the requirements of different working conditions, and is of great significance to development of the natural gas industry.

Description

Technical Field

[0001] The present invention belongs to the technical field of natural gas measurement, and in particular provides a metering device capable of achieving high-precision natural gas metering and effectively compensating for environmental interference, and specifically relates to a natural gas energy metering device. Background Art

[0002] As the global demand for clean energy continues to grow, natural gas, as an efficient and clean energy source, is becoming increasingly important in the energy field. In the production, transportation, storage and sales of natural gas, accurate measurement of the energy of natural gas is of vital importance for trade settlement, energy management and rational use of resources. However, there are many common problems with the existing natural gas energy metering devices, which seriously affect the accuracy and reliability of measurement. On the one hand, low metering accuracy is a prominent problem. The composition of natural gas is complex, and the gas quality components of different gas sources vary greatly. This places high demands on the adaptability of metering devices. Existing metering devices are difficult to accurately measure natural gas of different qualities, which easily leads to disputes and economic losses in scenarios such as trade settlement. On the other hand, the impact of environmental factors on metering results cannot be underestimated. The volume flow and energy of natural gas are closely related to environmental parameters such as temperature, pressure, and humidity. In actual applications, the environmental conditions in different regions vary significantly, and in the same region, environmental parameters will also change dynamically over time. Existing metering devices are often unable to effectively cope with the interference of these environmental factors, resulting in large deviations in metering results and unable to meet the increasingly stringent metering accuracy requirements. In addition, the existing devices are not stable and adaptable enough in different flow ranges and complex working conditions. For example, in a natural gas transmission network, the flow rate may fluctuate in a large range due to changes in gas demand. At the same time, there may be complex working conditions such as impurities and pressure fluctuations in the pipeline. Under these conditions, the existing metering devices are difficult to ensure stable and accurate metering, which limits their application in actual engineering. In summary, the development of a natural gas energy metering standard device with high-precision metering core components and the ability to effectively compensate for environmental interference has important practical significance for promoting the healthy development of the natural gas industry, improving energy utilization efficiency, and ensuring the fairness of energy transactions. Summary of the invention

[0003] The present invention provides a natural gas energy metering device. The purpose of the present invention is to provide a metering device that can achieve high-precision natural gas metering and effectively compensate for environmental interference.

[0004] The technical solution of the present invention is as follows: A natural gas energy metering device comprises a front-end rectification unit, a flow metering unit, a component analysis unit, an environmental parameter monitoring and compensation unit, and a data processing and control unit; The front-end rectifying unit includes a double-helix guide vane and a honeycomb turbulence suppression device. The double-helix guide vane is installed at the inlet of the natural gas transmission pipeline and is used to convert irregular flows such as turbulence and eddy currents in the natural gas flow into stable laminar flows. The honeycomb turbulence suppression device is arranged behind the double-helix guide vane, and its honeycomb porous structure is used to decompose large-scale eddies into small-scale eddies to suppress instability in fluid flow. The flow metering unit includes a high-precision flow sensor and a flow regulating and stabilizing device. The high-precision flow sensor is used to measure the flow of natural gas. The flow regulating and stabilizing device automatically adjusts the flow of natural gas in the pipeline and the pressure in the pipeline according to the flow data fed back by the flow sensor. The component analysis unit includes a multi-component gas analyzer and a real-time online monitoring system. The multi-component gas analyzer is used to analyze multiple components in natural gas, and the real-time online monitoring system is used to collect and transmit component analysis data in real time. The environmental parameter monitoring and compensation unit includes an environmental parameter sensor and a compensation algorithm and control system. The environmental parameter sensor is used to collect environmental parameters such as temperature, pressure, humidity, etc. in real time. The compensation algorithm and control system uses a pre-established compensation algorithm to perform real-time compensation on the metering data based on the collected data. The data processing and control unit includes a data acquisition and processing module, an intelligent control module and a data display and output module. The data acquisition and processing module is used to acquire and process data from other units. The intelligent control module intelligently controls the entire metering device according to the data processing results. The data display and output module is used to display and output the processed metering data.

[0005] As a preferred embodiment of the present invention, the double-helix guide vane has a spiral structure and is fixed to the inner wall of the pipe by bolts, and the spiral center coincides with the center of the pipe. The honeycomb-type turbulence suppression device is tightly connected to the double-helix guide vane and fixed to the pipe by bolts.

[0006] As a preferred solution of the present invention, the high-precision flow sensor is a turbine flow meter, which drives the turbine blades to rotate by the power of the flowing fluid, and its rotation speed is approximately proportional to the volume flow rate. The fluid volume indication passing through the flow meter is based on the turbine impeller rotation number. And the measurement axis of the high-precision flow sensor is consistent with the pipeline axis.

[0007] As a preferred solution of the present invention, the flow regulation and stabilization device includes a regulating valve and a pressure-stabilizing tank. The regulating valve is installed upstream of the flow sensor, connected through a pipeline and a control line, and automatically adjusts the flow according to a feedback signal of the flow sensor. The pressure-stabilizing tank is installed near the flow sensor and connected to the main pipeline through a pipeline to stabilize the pressure in the pipeline.

[0008] As a preferred embodiment of the present invention, the multi-component gas analyzer adopts gas chromatography technology and near-infrared spectroscopy analysis technology. The gas chromatography technology separates the natural gas sample in a chromatographic column and uses a detector to detect and quantitatively analyze different components. The near-infrared spectroscopy analysis technology uses the differences in absorption characteristics of different gas molecules in the near-infrared band to analyze the components of natural gas by detecting spectral signals.

[0009] As a preferred solution of the present invention, the real-time online monitoring system is connected to the multi-component gas analyzer through a sampling pipeline.

[0010] As a preferred solution of the present invention, the environmental parameter sensor includes a temperature sensor, a pressure sensor and a humidity sensor. The temperature sensor adopts a high-precision thermal resistor temperature transmitter, the pressure sensor adopts a capacitive pressure transmitter, and the humidity sensor adopts a resistive humidity sensor. The sensors are distributed at key positions of the natural gas transmission pipeline and the metering device.

[0011] As a preferred solution of the present invention, the compensation algorithm and control system corrects the volume flow measured by the flow metering unit based on the ideal gas state equation model in combination with real-time measured temperature and pressure data to obtain an accurate volume flow under standard conditions and control the entire metering device.

[0012] As a preferred solution of the present invention, the data acquisition and processing module adopts a high-speed data acquisition card and advanced data processing algorithms, the intelligent control module can communicate with the host computer, and the data display and output module outputs the processed metering data through a standard data interface.

[0013] The beneficial effects of the present invention are: The present invention pre-processes the natural gas flow through a front-end rectifying unit, converts irregular flow into stable laminar flow, reduces the impact of airflow fluctuations on metering accuracy, and uses high-precision flow sensors and advanced component analysis technology to accurately measure the flow and components of natural gas. Combined with precise compensation algorithms, the accuracy of natural gas energy metering is effectively improved, meeting the strict requirements for high-precision metering in natural gas trade settlement and other fields.

[0014] The environmental parameter monitoring and compensation unit can monitor the environmental temperature, pressure, humidity and other parameters in real time, and make real-time corrections to the metering data through the compensation algorithm, effectively compensating for the interference of environmental factors on the metering results. Regardless of the environmental conditions, the metering device can operate stably and achieve high-precision metering, thus improving the environmental adaptability and reliability of the device.

[0015] The flow regulation and stabilization device can automatically adjust the flow and pressure of natural gas according to different flow ranges and working conditions, ensuring that the metering device can work stably under various complex working conditions. The intelligent control module controls the entire device intelligently, further improving the device's adaptability to different working conditions.

[0016] The real-time online monitoring system of the component analysis unit and the intelligent control module of the data processing and control unit realize real-time monitoring and intelligent control of the natural gas energy metering process, can promptly discover and handle problems arising in the metering process, and improve the efficiency and automation level of the metering work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a structural block diagram of an embodiment of the present invention.

[0019] In the figure: 100, front end rectifier unit; 101, double helical guide vane; 102, turbulence suppression device; 200. Flow metering unit; 201. High-precision flow sensor; 202. Flow regulating and stabilizing device; 300. Component analysis unit; 301. Multi-component gas analyzer; 302. Real-time online monitoring system; 400. Environmental parameter monitoring and compensation unit; 401. Environmental parameter sensor; 402. Compensation algorithm and control system; 500, data processing and control unit; 501, data acquisition and processing module; 502, intelligent control module; 503, data display and output module. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1 like Figure 1As shown, this embodiment proposes a natural gas energy metering device, including a front-end rectifying unit 100, a flow metering unit 200, a component analysis unit 300, an environmental parameter monitoring and compensation unit 400, and a data processing and control unit 500; The front-end rectifying unit 100 includes a double-helix guide vane 101 and a honeycomb turbulence suppression device 102. The double-helix guide vane 101 is installed at the inlet of the natural gas transmission pipeline to convert irregular flows such as turbulence and eddy currents in the natural gas flow into stable laminar flows. The honeycomb turbulence suppression device 102 is arranged behind the double-helix guide vane 101. Its honeycomb porous structure is used to decompose large-scale eddies into small-scale eddies to suppress instability in fluid flow. The flow metering unit 200 includes a high-precision flow sensor 201 and a flow regulating and stabilizing device 202. The high-precision flow sensor 201 is used to measure the flow of natural gas. The flow regulating and stabilizing device 202 automatically adjusts the flow and pressure of natural gas in the pipeline according to the flow data fed back by the flow sensor. The component analysis unit 300 includes a multi-component gas analyzer 301 and a real-time online monitoring system 302. The multi-component gas analyzer 301 is used to analyze multiple components in natural gas, and the real-time online monitoring system 302 is used to collect and transmit component analysis data in real time. The environmental parameter monitoring and compensation unit 400 includes an environmental parameter sensor 401 and a compensation algorithm and control system 402. The environmental parameter sensor 401 is used to collect environmental temperature, pressure, humidity and other parameters in real time. The compensation algorithm and control system 402 uses a pre-established compensation algorithm to perform real-time compensation on the metering data based on the collected data. The data processing and control unit 500 includes a data acquisition and processing module 501, an intelligent control module 502 and a data display and output module 503. The data acquisition and processing module 501 is used to acquire and process data from other units, the intelligent control module 502 performs intelligent control on the entire metering device according to the data processing results, and the data display and output module 503 is used to display and output the processed metering data.

[0022] like Figure 1 As shown, the double-helix guide vane 101 is in a spiral structure and is fixed to the inner wall of the pipe by bolts, and the spiral center coincides with the center of the pipe. The honeycomb-type turbulence suppression device 102 is tightly connected to the double-helix guide vane 101 and is fixed to the pipe by bolts.

[0023] The high-precision flow sensor 201 is a turbine flow meter, which drives the turbine blades to rotate by the power of the flowing fluid. Its rotation speed is approximately proportional to the volume flow rate, and the fluid volume indication through the flow meter is based on the turbine impeller rotation number. The measurement axis of the high-precision flow sensor 201 is consistent with the pipeline axis.

[0024] The flow regulating and stabilizing device 202 includes a regulating valve and a pressure stabilizing tank. The regulating valve is installed upstream of the flow sensor and is connected to the control line through a pipeline. The flow is automatically adjusted according to the feedback signal of the flow sensor. The pressure stabilizing tank is installed near the flow sensor and is connected to the main pipeline through a pipeline to stabilize the pressure in the pipeline.

[0025] The multi-component gas analyzer 301 adopts gas chromatography technology and near-infrared spectroscopy analysis technology. Gas chromatography technology separates the natural gas sample in the chromatographic column and uses a detector to detect and quantitatively analyze different components. Near-infrared spectroscopy analysis technology uses the differences in absorption characteristics of different gas molecules in the near-infrared band to analyze the components of natural gas by detecting spectral signals.

[0026] The real-time online monitoring system 302 is connected to the multi-component gas analyzer 301 through a sampling pipeline.

[0027] The environmental parameter sensor 401 includes a temperature sensor, a pressure sensor and a humidity sensor. The temperature sensor uses a high-precision thermal resistor temperature transmitter, the pressure sensor uses a capacitive pressure transmitter, and the humidity sensor uses a resistive humidity sensor. Each sensor is distributed at key locations of the natural gas transmission pipeline and metering device.

[0028] The compensation algorithm and control system 402 corrects the volume flow measured by the flow metering unit 200 according to the ideal gas state equation model and combines the actual measured temperature and pressure data to obtain the accurate volume flow under standard conditions and control the entire metering device.

[0029] The data acquisition and processing module 501 uses a high-speed data acquisition card and advanced data processing algorithms, the intelligent control module 502 can communicate with the host computer, and the data display and output module 503 outputs the processed metering data through a standard data interface.

[0030] In this embodiment, the overall structure of the natural gas energy measurement standard device mainly includes a front-end rectification unit 100, a flow metering unit 200, a component analysis unit 300, an environmental parameter monitoring and compensation unit 400 and a data processing and control unit 500.

[0031] Front-end rectifier unit 100 The double helix guide vane 101 is arranged at the entrance of the natural gas transmission pipeline. The double helix guide vane 101 has a spiral structure, and its spiral angle and pitch are precisely designed to ensure that the turbulence, eddy current and other irregular flows in the natural gas flow can be effectively converted into stable laminar flow. When the natural gas enters the pipeline, it first hits the double helix guide vane 101. Under the guidance of the guide vane, the speed and direction of the airflow are redistributed, and the originally chaotic airflow is gradually combed into an orderly laminar state, providing stable airflow conditions for subsequent metering work.

[0032] The honeycomb turbulence suppression device 102, which is immediately connected to the double-helix guide vane 101, is composed of a honeycomb porous structure. The honeycomb pore size and arrangement have been carefully optimized, and can further decompose the large-scale vortices that have been initially processed by the double-helix guide vane 101 into small-scale vortices, thereby suppressing the instability in the fluid flow. In this way, the natural gas flow can enter the rear-end metering device more smoothly, reducing the impact of airflow fluctuations on metering accuracy, and significantly improving measurement accuracy.

[0033] Flow metering unit 200 The high-precision flow sensor 201 uses advanced turbine flowmeters and other high-precision flow measurement instruments. The turbine flowmeter drives the turbine blades to rotate through the power of the moving fluid. Its rotation speed is approximately proportional to the volume flow rate. The fluid volume indication through the flowmeter is based on the number of revolutions of the turbine impeller. It has the advantages of high measurement accuracy, good repeatability and stability, wide measuring range, rapid response to flow changes, strong anti-interference ability, and easy signal transmission. These high-precision flow sensors 201 can accurately sense the flow changes of natural gas and provide accurate flow data for natural gas energy measurement.

[0034] The flow regulating and stabilizing device 202 includes components such as a regulating valve and a pressure-stabilizing tank. The regulating valve automatically adjusts the flow of natural gas in the pipeline according to the flow data fed back by the flow sensor to keep it within a suitable range to meet the metering requirements under different working conditions. The pressure-stabilizing tank is used to stabilize the pressure in the pipeline, reduce the impact of pressure fluctuations on flow measurement, and ensure the stability of flow measurement.

[0035] Component Analysis Unit 300 Multi-component gas analyzer 301 adopts advanced gas chromatography technology or near-infrared spectroscopy analysis technology, which can quickly and accurately analyze multiple components in natural gas. Gas chromatography technology separates the natural gas sample in the chromatographic column and then uses a detector to detect and quantitatively analyze different components. It can accurately determine the content of main components such as methane, ethane, propane and impurities such as nitrogen and carbon dioxide in natural gas. Near-infrared spectroscopy analysis technology uses the difference in absorption characteristics of different gas molecules in the near-infrared band to analyze the components of natural gas by detecting spectral signals. It has the advantages of fast analysis speed and no need for complex sample pretreatment.

[0036] The real-time online monitoring system 302 is connected to the multi-component gas analyzer 301 and can collect and transmit component analysis data in real time. Through online monitoring, the changes in natural gas components can be timely grasped, providing real-time and accurate component data for the precise calculation of natural gas energy.

[0037] Environmental parameter monitoring and compensation unit 400 Environmental parameter sensors 401, including temperature sensors, pressure sensors, humidity sensors, etc., are distributed in key positions of natural gas transmission pipelines and metering devices to collect environmental temperature, pressure, humidity and other parameters in real time. The temperature sensor adopts a high-precision thermal resistor temperature transmitter, which can accurately measure changes in ambient temperature. The pressure sensor adopts a capacitive pressure transmitter, which has the characteristics of high precision and high sensitivity and can accurately measure the pressure of natural gas in the pipeline. The humidity sensor adopts a capacitive or resistive humidity sensor to measure the humidity in natural gas.

[0038] The compensation algorithm and control system 402 uses a pre-established compensation algorithm to perform real-time compensation on the metering data based on the data collected by the environmental parameter sensor 401. For the influence of temperature and pressure on the volume and energy of natural gas, the volume flow measured by the flow metering unit 200 is corrected through the ideal gas state equation or a more accurate state equation model, combined with the actual measured temperature and pressure data, to obtain the accurate volume flow under standard conditions, and then accurately calculate the energy of the natural gas. The control system controls the flow regulation and stabilization device 202 and other components based on the results of the compensation algorithm to ensure that the metering device can operate stably and achieve high-precision metering under different environmental conditions.

[0039] Data processing and control unit 500 The data acquisition and processing module 501 is responsible for collecting data from the flow metering unit 200, the component analysis unit 300 and the environmental parameter monitoring and compensation unit 400, and performing preliminary processing and storage. It uses a high-speed data acquisition card and advanced data processing algorithms, and can quickly and accurately process a large amount of real-time data to ensure the integrity and accuracy of the data.

[0040] The intelligent control module 502 performs intelligent control on the entire metering device according to the data processing results. When a large change in the natural gas flow or composition is detected, the working parameters of the flow regulation and stabilization device 202 are automatically adjusted to ensure the stable operation of the metering device. The intelligent control module 502 can also communicate with the host computer to realize remote monitoring and operation.

[0041] The data display and output module 503 displays the processed metering data in an intuitive manner, such as displaying the flow, composition, energy and other parameters of natural gas through a liquid crystal display or a host computer software interface. The data can also be output through a standard data interface for data sharing and integration with other systems.

[0042] Workflow: Device Installation Installation of the front-end rectifying unit 100: First, accurately install the double-helix guide vane 101 at the entrance of the natural gas transmission pipeline, ensure that its spiral center coincides with the pipeline center, and the installation angle and position meet the design requirements. Use high-strength connectors to fix the double-helix guide vane 101 on the inner wall of the pipeline to ensure its stability under the impact of high-speed airflow. Then, install the honeycomb turbulence suppression device 102 behind the double-helix guide vane 101 so that it is tightly connected to the double-helix guide vane 101 to ensure that the natural gas flow can smoothly enter the honeycomb turbulence suppression device 102 from the double-helix guide vane 101. Similarly, use a reliable connection method to fix the honeycomb turbulence suppression device 102 on the pipeline; Installation of flow metering unit 200: According to the specifications and flow range of the pipeline, select a suitable high-precision flow sensor 201, such as a turbine flowmeter, and accurately install the flow sensor on the pipeline processed by the front-end rectifier unit 100 according to its installation instructions, ensuring that the measurement axis of the sensor is consistent with the pipeline axis to ensure the accuracy of the measurement. At the same time, install the flow regulation and stabilization device 202. The regulating valve is installed upstream or downstream of the flow sensor. Select a suitable position according to actual needs. Connect it through pipelines and control lines so that it can automatically adjust the flow according to the feedback signal of the flow sensor. The pressure regulating tank is installed near the flow sensor and connected to the main pipeline through a pipeline to stabilize the pressure in the pipeline; Installation of component analysis unit 300: Install the multi-component gas analyzer 301 in a specially designed analysis cabinet. The analysis cabinet should have good ventilation, heat dissipation and protection performance. Introduce natural gas into the multi-component gas analyzer 301 through a sampling pipeline. The material of the sampling pipeline should be corrosion-resistant and non-absorbent of natural gas components. The length and diameter of the pipeline should be optimized according to actual conditions to ensure the accuracy and timeliness of sampling. At the same time, install relevant equipment of the real-time online monitoring system 302, including data acquisition devices, communication modules, etc., and connect them to the multi-component gas analyzer 301 to realize real-time data collection and transmission; Installation of environmental parameter monitoring and compensation unit 400: Install temperature sensors, pressure sensors and humidity sensors at key locations of natural gas transmission pipelines and metering devices, such as the outer wall of the pipeline, the outer shell of the metering device, etc. The temperature sensor should be installed at a location that can accurately measure the ambient temperature to avoid being affected by the gas temperature or other heat sources in the pipeline. The pressure sensor should be installed at a location that can accurately measure the natural gas pressure in the pipeline and connected to the pipeline through a pressure lead pipe. The pressure lead pipe should avoid blockage or leakage. The humidity sensor is installed at a location that can accurately measure the humidity of the natural gas. Choose a suitable installation method based on actual conditions. At the same time, install the hardware equipment of the compensation algorithm and control system 402, including a controller, a computing module, etc., and connect it to the environmental parameter sensor 401 and other related units to realize data collection, processing and output of control signals; Installation of the data processing and control unit 500: The data acquisition and processing module 501, the intelligent control module 502 and the data display and output module 503 are installed in the control cabinet. The control cabinet should have good electromagnetic shielding and protection performance. The data acquisition and processing module 501 is connected to the flow metering unit 200, the component analysis unit 300 and the environmental parameter monitoring and compensation unit 400 through a data transmission line to realize data collection and transmission. The intelligent control module 502 is connected to the flow regulation and stabilization device 202, other actuators, etc. to realize intelligent control of the entire metering device. The data display and output module 503 is connected to the host computer or other external devices through a communication interface to realize data display and output.

[0043] Device debugging Debugging of the front-end rectifying unit 100: After the device is installed, the front-end rectifying unit 100 is debugged first. By simulating natural gas flows with different flow rates and flow velocities, the rectifying effect of the double-helix guide vane 101 and the honeycomb turbulence suppression device 102 on the airflow is observed. The airflow velocity distribution and turbulence intensity after being processed by the front-end rectifying unit 100 are measured using a flow meter and other detection equipment. The installation angle of the double-helix guide vane 101 or the parameters of the honeycomb turbulence suppression device 102 are adjusted according to the measurement results until the airflow reaches a stable laminar state and meets the requirements of the back-end metering device for airflow stability. Debugging of the flow metering unit 200: Debugging the flow metering unit 200, first calibrate the high-precision flow sensor 201, calibrate the flow sensor using a standard flow source, adjust the measurement parameters of the sensor according to the calibration results, and ensure that its measurement accuracy meets the requirements, then debug the flow regulating and stabilizing device 202, adjust the opening of the regulating valve and the working pressure of the pressure regulating tank through manual control and automatic control, observe the changes in flow and pressure, and ensure that the flow regulating and stabilizing device 202 can accurately adjust the flow and pressure according to actual needs, and ensure the stability of flow measurement; Debugging the component analysis unit 300: Debugging the component analysis unit 300, first calibrating the multi-component gas analyzer 301, using a standard gas sample to calibrate the multi-component gas analyzer 301, adjusting the analysis parameters of the analyzer according to the calibration results to ensure that the analysis accuracy of each component of natural gas meets the requirements, and then testing the data acquisition and transmission functions of the real-time online monitoring system 302 to ensure that the data can be accurately and timely transmitted to the data processing and control unit 500; Debugging of the environmental parameter monitoring and compensation unit 400: Debugging the environmental parameter monitoring and compensation unit 400, first calibrating the environmental parameter sensor 401, using a standard temperature source, pressure source and humidity source to calibrate the temperature sensor, pressure sensor and humidity sensor, adjusting the measurement parameters of the sensor according to the calibration results to ensure that its measurement accuracy meets the requirements, then testing the compensation effect of the compensation algorithm and control system 402, observing the compensation of the metering data by simulating different environmental conditions, adjusting the parameters of the compensation algorithm according to the test results to ensure that the metering data can be accurately compensated under different environmental conditions; Debugging of the data processing and control unit 500: Debug the data processing and control unit 500. First, test the data acquisition and processing capabilities of the data acquisition and processing module 501 to ensure that it can accurately and quickly collect and process data from other units. Then, test the control function of the intelligent control module 502. By simulating different operating conditions and fault conditions, observe the control effect of the intelligent control module 502 on the entire metering device. Adjust the control strategy of the intelligent control module 502 according to the test results. Finally, test the display and output functions of the data display and output module 503 to ensure that the data can be displayed and output accurately and clearly.

[0044] Device operation Daily operation: After the device is debugged and confirmed to meet the requirements of various performance indicators, it can be put into daily operation. During the operation, the natural gas first passes through the front-end rectifier unit 100, and the double-helix guide vane 101 and the honeycomb turbulence suppression device 102 convert the natural gas flow into a stable laminar flow, and then enters the flow metering unit 200. The high-precision flow sensor 201 measures the flow of natural gas, and the flow regulation and stabilization device 202 adjusts the flow and pressure according to actual needs to ensure the accuracy and stability of flow metering. At the same time, the natural gas enters the component analysis unit 300 through the sampling pipeline, and the multi-component gas analyzer 301 performs real-time analysis on the components of the natural gas. The real-time online monitoring system 302 transmits the analysis data to the data processing and control unit 500. The environmental parameter monitoring and compensation unit 400 monitors the environmental temperature, pressure, humidity and other parameters in real time, and compensates the metering data in real time according to the compensation algorithm. The data processing and control unit 500 collects and processes the data from each unit, and intelligently controls the entire metering device through the intelligent control module 502. At the same time, the processed metering data is displayed and output through the data display and output module 503; Maintenance and care: During the operation of the device, each unit needs to be regularly maintained and cared for. For the front-end rectifier unit 100, regularly check whether there are impurities attached or damaged on the surface of the double-helix guide vane 101 and the honeycomb turbulence suppression device 102. If necessary, clean or replace them in time. For the flow metering unit 200, regularly calibrate and maintain the high-precision flow sensor 201, check the working status of the flow regulation and stabilization device 202 to ensure its normal operation. For the component analysis unit 300, regularly calibrate and maintain the multi-component gas analyzer 301, replace the analytical reagents and consumables to ensure its analysis accuracy. For the environmental parameter monitoring and compensation unit 400, regularly calibrate and maintain the environmental parameter sensor 401, check the operation of the compensation algorithm and control system 402. For the data processing and control unit 500, regularly check and maintain the hardware equipment, update the software system to ensure its stable operation; Fault handling: During the operation of the device, if a fault occurs, the intelligent control module 502 of the data processing and control unit 500 will promptly issue a fault alarm signal and perform a preliminary diagnosis of the fault through a fault diagnosis algorithm. The operator will troubleshoot and handle the fault based on the fault alarm information and diagnosis results. For example, if the flow metering unit 200 fails, it may be that the flow sensor is damaged or the flow regulation and stabilization device 202 fails. The operator needs to check the connection lines and working status of the relevant equipment and perform repairs or replacements. If the component analysis unit 300 fails, it may be that the analysis component of the multi-component gas analyzer 301 fails or the sampling pipeline is blocked. The operator needs to inspect and repair the relevant components. After the fault handling is completed, the device is re-debugged and tested to ensure that it resumes normal operation.

Claims

1. A natural gas energy metering device, characterized in that: It includes a front-end rectification unit, a flow metering unit, a component analysis unit, an environmental parameter monitoring and compensation unit, and a data processing and control unit; The front-end rectifying unit includes a double-helix guide vane and a honeycomb turbulence suppression device. The double-helix guide vane is installed at the inlet of the natural gas transmission pipeline and is used to convert irregular flows such as turbulence and eddy currents in the natural gas flow into stable laminar flows. The honeycomb turbulence suppression device is arranged behind the double-helix guide vane, and its honeycomb porous structure is used to decompose large-scale eddy currents into small-scale eddy currents to suppress instability in fluid flow. The flow metering unit includes a high-precision flow sensor and a flow regulating and stabilizing device. The high-precision flow sensor is used to measure the flow of natural gas. The flow regulating and stabilizing device automatically adjusts the flow and pressure of natural gas in the pipeline according to the data fed back by the flow sensor. The component analysis unit includes a multi-component gas analyzer and a real-time online monitoring system. The multi-component gas analyzer is used to analyze multiple components in natural gas, and the real-time online monitoring system is used to collect and transmit component analysis data in real time. The environmental parameter monitoring and compensation unit includes an environmental parameter sensor and a compensation algorithm and control system. The environmental parameter sensor is used to collect environmental parameters such as temperature, pressure, humidity, etc. in real time. The compensation algorithm and control system uses a pre-established compensation algorithm to perform real-time compensation on the metering data based on the collected data. The data processing and control unit includes a data acquisition and processing module, an intelligent control module and a data display and output module. The data acquisition and processing module is used to acquire and process data from other units. The intelligent control module intelligently controls the entire metering device according to the data processing results. The data display and output module is used to display and output the processed metering data.

2. A natural gas energy metering device according to claim 1, characterized in that: The double-helix guide vane has a spiral structure and is fixed to the inner wall of the pipeline by bolt connection, and its spiral center coincides with the center of the pipeline. The honeycomb turbulence suppression device is tightly connected to the double-helix guide vane and fixed to the pipeline by bolt connection.

3. A natural gas energy metering device according to claim 2, characterized in that: The high-precision flow sensor is a turbine flow meter, which drives the turbine blades to rotate by the power of the flowing fluid. The rotation speed is approximately proportional to the volume flow rate. The fluid volume indication passing through the flow meter is based on the number of revolutions of the turbine impeller, and the measurement axis of the high-precision flow sensor is consistent with the pipeline axis.

4. A natural gas energy metering device according to claim 3, characterized in that: The flow regulating and stabilizing device includes a regulating valve and a pressure stabilizing tank. The regulating valve is installed upstream of the flow sensor, connected to the control line through a pipeline, and automatically adjusts the flow according to the feedback signal of the flow sensor. The pressure stabilizing tank is installed near the flow sensor and connected to the main pipeline through a pipeline to stabilize the pressure in the pipeline.

5. A natural gas energy metering device according to claim 4, characterized in that: The multi-component gas analyzer adopts gas chromatography technology and near-infrared spectroscopy analysis technology. The gas chromatography technology separates the natural gas sample in a chromatographic column and uses a detector to detect and quantitatively analyze different components. The near-infrared spectroscopy analysis technology uses the differences in absorption characteristics of different gas molecules in the near-infrared band to analyze the components of natural gas by detecting spectral signals.

6. A natural gas energy metering device according to claim 5, characterized in that: The real-time online monitoring system is connected to the multi-component gas analyzer through a sampling pipeline.

7. A natural gas energy metering device according to claim 6, characterized in that: The environmental parameter sensor includes a temperature sensor, a pressure sensor and a humidity sensor. The temperature sensor adopts a high-precision thermal resistor temperature transmitter, the pressure sensor adopts a capacitive pressure transmitter, and the humidity sensor adopts a resistive humidity sensor. Each sensor is distributed at key positions of the natural gas transmission pipeline and the metering device.

8. A natural gas energy metering device according to claim 7, characterized in that: The compensation algorithm and control system corrects the volume flow measured by the flow metering unit according to the ideal gas state equation model in combination with the actually measured temperature and pressure data to obtain the accurate volume flow under standard conditions and control the entire metering device.

9. A natural gas energy metering device according to claim 8, characterized in that: The data acquisition and processing module adopts a high-speed data acquisition card and advanced data processing algorithms, the intelligent control module can communicate with the host computer, and the data display and output module outputs the processed metering data through a standard data interface.

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