Calibration method, system and device for hydrocarbon dew-point instrument and computer equipment

Abstract

The invention discloses a hydrocarbon dew-point instrument calibration method, system and device and computer equipment, relates to the technical field of measurement, and aims to solve the problems. The method comprises the steps that a measured value obtained by hydrocarbon dew point measurement of standard gas through a hydrocarbon dew point instrument and a reference value obtained by hydrocarbon dew point measurement of the standard gas through a standard hydrocarbon dew point instrument are obtained, the standard hydrocarbon dew point instrument is a hydrocarbon dew point instrument with the measurement precision higher than a precision threshold value, and the hydrocarbon dew point instrument is calibrated based on the measured value and the reference value.

Description

Technical Field

[0001] The present application relates to the field of measurement technology, and in particular, to a calibration method, system, device, and computer equipment for a hydrocarbon dew point meter. Background Art

[0002] A hydrocarbon dew point meter is an instrument used to measure the temperature at which hydrocarbon components in a gas start to condense into a liquid state (i.e., reach the hydrocarbon dew point (HCDP)) under specific pressure and temperature conditions. It is widely used in fields such as natural gas, petrochemical, and gas processing to ensure gas quality, process safety, and equipment protection. For example: The hydrocarbon dew point meter cools the mirror surface until hydrocarbons condense to form droplets, and then uses an optical sensor to detect the mirror surface temperature at the moment of condensation.

[0003] In order to ensure the measurement accuracy of the hydrocarbon dew point meter for hydrocarbon dew point, it is necessary to calibrate the hydrocarbon dew point meter. In the prior art, the potential liquid hydrocarbon content in the gas to be measured is determined by the weighing method, and then the theoretical hydrocarbon dew point is inversely deduced through the liquid hydrocarbon content and the hydrocarbon phase model, and the accuracy of the measurement result of the hydrocarbon dew point meter is corrected according to the theoretical dew point.

[0004] However, the prior art requires the disassembly and submission of the hydrocarbon dew point meter equipment for inspection, with a long calibration period, high cost, and the theoretical hydrocarbon dew point obtained by inverse deduction through the hydrocarbon phase model is not accurate enough. The calibration method based on the theoretical value is not applicable to the calibration of the hydrocarbon dew point meter in complex application scenarios. Summary of the Invention

[0005] The purpose of the present application is to provide a calibration method, system, device, and computer equipment for a hydrocarbon dew point meter, aiming to improve the calibration accuracy of the hydrocarbon dew point meter.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a calibration method for a hydrocarbon dew point meter, the method comprising:

[0008] Obtaining a measurement value obtained by the hydrocarbon dew point meter for measuring the hydrocarbon dew point of a standard gas, and a reference value obtained by a standard hydrocarbon dew point meter for measuring the hydrocarbon dew point of the standard gas.

[0009] Calibrating the hydrocarbon dew point meter based on the measurement value and the reference value.

[0010] Wherein, the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than the accuracy threshold.

[0011] In the technical solution provided by the embodiment of the present application, the hydrocarbon dew point of the standard gas is measured by a standard hydrocarbon dew point meter and a hydrocarbon dew point meter respectively to obtain a measured value and a reference value. While realizing the on-line calibration of the hydrocarbon dew point meter, the measurement environments of the standard hydrocarbon dew point meter and the hydrocarbon dew point meter are the same, the interference of environmental factors is the same, the measured value is more suitable for the actual application scenario, and the calibration effect of the hydrocarbon dew point meter is better.

[0012] In some embodiments, obtaining the measured value obtained by the hydrocarbon dew point meter for measuring the hydrocarbon dew point of the standard gas and the reference value obtained by the standard hydrocarbon dew point meter for measuring the hydrocarbon dew point of the standard gas can be specifically implemented as: inputting the standard gas under a set pressure into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively for hydrocarbon dew point measurement to obtain the measured value and the reference value. The hydrocarbon dew points corresponding to the standard gases under different pressures are also different. Therefore, by measuring the hydrocarbon dew point of the standard gas under a set pressure, multiple hydrocarbon dew point measurements and calibrations of the hydrocarbon dew point meter can be carried out based on the same standard gas through flexible setting of the pressure of the standard gas, realizing the offset calibration and slope calibration of the hydrocarbon dew point meter (at least two groups of measured values and reference values are required).

[0013] In some embodiments, the hydrocarbon dew point meter calibration method provided by the embodiment of the present application further includes: after a single hydrocarbon dew point measurement, purging the hydrocarbon dew point meter and the standard hydrocarbon dew point with nitrogen. After purging with nitrogen, the interference of the standard gas in the previous hydrocarbon dew point measurement on the subsequent hydrocarbon dew point measurement process is reduced. At the same time, nitrogen has stable chemical properties, is not easy to react with other substances, can effectively avoid the risks of oxidation, combustion or explosion, and is close to the air density, easy to mix and quickly discharge the standard gas, shortening the purging time and improving the efficiency of the hydrocarbon dew point calibration process.

[0014] In some embodiments, based on the measured value and the reference value, the calibration of the hydrocarbon dew point meter can be specifically implemented as: calculating the difference between the measured value and the reference value to obtain the calibration value. Calibrating the hydrocarbon dew point meter based on the calibration value. Calibrating based on the calibration value, the calculation process is simple, intuitive and easy to implement, ensuring the efficiency and real-time performance of the calibration process.

[0015] In some embodiments, the outlet gas flow rates of the hydrocarbon dew point meter and the standard hydrocarbon dew point meter are the same. Ensure that when the hydrocarbon dew point meter and the standard hydrocarbon dew point meter measure the hydrocarbon dew point value of the standard gas, the state of the standard gas is the same, reducing the measurement error between the two.

[0016] In some embodiments, the hydrocarbon dew point meter calibration method provided by the embodiment of the present application further includes: calculating the deviation value of the reference value from the theoretical value of the hydrocarbon dew point of the standard gas. When the deviation value is within the deviation threshold range, calibrating the hydrocarbon dew point meter based on the measured value and the reference value. Checking the measurement accuracy of the standard hydrocarbon dew point meter to avoid affecting the calibration effect of the hydrocarbon dew point meter when the standard hydrocarbon dew point meter has a large measurement error.

[0017] In some embodiments, the calculation formula for the theoretical value is as follows:

[0018]

[0019] Wherein, P represents the set pressure of the standard gas, T represents the theoretical value, R represents the gas constant, v represents the molar volume, α represents the gravitational term parameter, and b represents the repulsive term parameter. By introducing the gravitational term parameter related to temperature and the repulsive term parameter related to molecular size, considering the temperature factor and molecular size factor of the standard gas, the calculation of the theoretical value is more accurate.

[0020] In a second aspect, a hydrocarbon dew point meter calibration system is provided, and the system includes: a gas cylinder, a hydrocarbon dew point meter, a standard hydrocarbon dew point meter, and a processor.

[0021] The gas cylinder is used to supply the standard gas to the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively.

[0022] The hydrocarbon dew point meter is used to measure the hydrocarbon dew point of the standard gas to obtain a measured value.

[0023] The standard hydrocarbon dew point meter is used to measure the hydrocarbon dew point of the standard gas to obtain a reference value.

[0024] The processor is used to calibrate the hydrocarbon dew point meter based on the measured value and the reference value.

[0025] Wherein, the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than the accuracy threshold.

[0026] The technical solution provided by the embodiments of the present application measures the hydrocarbon dew point of the standard gas supplied by the gas cylinder through the standard hydrocarbon dew point meter and the hydrocarbon dew point meter respectively to obtain the measured value and the reference value. While realizing the on-line calibration of the hydrocarbon dew point meter, the measurement environments of the standard hydrocarbon dew point meter and the hydrocarbon dew point meter are the same, and the interference of environmental factors is the same. The measured value is more suitable for the actual application scenario, and the calibration effect of the hydrocarbon dew point meter is better.

[0027] In some embodiments, the hydrocarbon dew point meter calibration system provided by the embodiments of the present application further includes a pressure regulator, and the pressure regulator is used to input the standard gas under the set pressure into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively. By adjusting the pressure of the standard gas through the pressure regulator, measuring the hydrocarbon dew point of the standard gas under the set pressure, realizing flexible setting of the pressure of the standard gas, the processor can perform multiple hydrocarbon dew point measurements and calibrations of the hydrocarbon dew point meter based on the same standard gas, and further realize the offset calibration and slope calibration of the hydrocarbon dew point meter.

[0028] In some embodiments, the above-mentioned gas cylinder is further configured to: after a single hydrocarbon dew point measurement, output nitrogen to purge the hydrocarbon dew point analyzer and the standard hydrocarbon dew point. The standard gas in the gas cylinder is mixed with nitrogen. After the hydrocarbon dew point measurement, nitrogen can be directly and flexibly switched to output for purging, reducing the interference of the standard gas in the previous hydrocarbon dew point measurement on the subsequent hydrocarbon dew point measurement process.

[0029] In some embodiments, the above-mentioned processor is further configured to: calculate the difference between the measured value and the reference value to obtain a calibration value, and calibrate the hydrocarbon dew point analyzer based on the calibration value. Calibrate the hydrocarbon dew point analyzer based on the calibration value. Calibrating based on the calibration value, the calculation process is simple, intuitive and easy to implement, ensuring the efficiency and real-time performance of the calibration process.

[0030] In some embodiments, the hydrocarbon dew point analyzer calibration system provided by the embodiments of the present application further includes a flow regulating valve, and the flow regulating valve is used to regulate the outlet gas flow rate of the hydrocarbon dew point analyzer and the standard hydrocarbon dew point analyzer. Ensure that when the hydrocarbon dew point analyzer and the standard hydrocarbon dew point analyzer measure the hydrocarbon dew point value of the standard gas, the state of the standard gas is the same, reducing the measurement error between the two.

[0031] In some embodiments, the above-mentioned processor is further configured to: calculate the deviation value of the reference value relative to the theoretical value of the hydrocarbon dew point of the standard gas. When the deviation value is within the deviation threshold range, calibrate the hydrocarbon dew point analyzer based on the measured value and the reference value. Verify the measurement accuracy of the standard hydrocarbon dew point analyzer to avoid affecting the calibration effect of the hydrocarbon dew point analyzer when the standard hydrocarbon dew point analyzer has a large measurement error.

[0032] In some embodiments, the calculation formula of the theoretical value is as follows:

[0033]

[0034] Wherein, P represents the set pressure of the standard gas, T represents the theoretical value, R represents the gas constant, v represents the molar volume, α represents the gravitational term parameter, and b represents the repulsive term parameter. By introducing the gravitational term parameter related to temperature and the repulsive term parameter related to molecular size, considering the temperature factor and molecular size factor of the standard gas, the calculation of the theoretical value is more accurate.

[0035] In a third aspect, a hydrocarbon dew point analyzer calibration device is provided, and the device includes: an acquisition module and a calibration module.

[0036] The above-mentioned acquisition module is configured to acquire the measured value obtained by the hydrocarbon dew point analyzer measuring the hydrocarbon dew point of the standard gas, and the reference value obtained by the standard hydrocarbon dew point analyzer measuring the hydrocarbon dew point of the standard gas.

[0037] The above-mentioned calibration module is configured to calibrate the hydrocarbon dew point analyzer based on the measured value and the reference value.

[0038] Among them, the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than the accuracy threshold.

[0039] In some embodiments, the above-mentioned acquisition module is further configured to: input a standard gas under a set pressure into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively for hydrocarbon dew point measurement, and obtain a measurement value and a reference value.

[0040] In some embodiments, the above-mentioned calibration module is further configured to: after a single hydrocarbon dew point measurement, purge the hydrocarbon dew point meter and the standard hydrocarbon dew point with nitrogen.

[0041] In some embodiments, the above-mentioned calibration module is further configured to: calculate the difference between the measurement value and the reference value to obtain a calibration value. Calibrate the hydrocarbon dew point meter based on the calibration value.

[0042] In some embodiments, the outlet gas flow rates of the hydrocarbon dew point meter and the standard hydrocarbon dew point meter are the same.

[0043] In some embodiments, the above-mentioned calibration module is further configured to: calculate the deviation value of the reference value from the theoretical value of the hydrocarbon dew point of the standard gas, and when the deviation value is within the deviation threshold range, calibrate the hydrocarbon dew point meter based on the measurement value and the reference value.

[0044] In some embodiments, the calculation formula for the theoretical value is as follows:

[0045]

[0046] Among them, P represents the set pressure of the standard gas, T represents the theoretical value, R represents the gas constant, v represents the molar volume, α represents the gravitational term parameter, and b represents the repulsive term parameter.

[0047] For the technical effects corresponding to any implementation manner in the third aspect, reference may be made to the technical effects corresponding to any implementation manner in the first aspect above, and details are not described herein again.

[0048] In a fourth aspect, a computer device is provided. The computer device includes: a processor and a memory, and at least one computer program is stored in the memory. The at least one computer program is loaded and executed by the processor to implement the hydrocarbon dew point meter calibration method in the above aspect.

[0049] The solution provided in the above fourth aspect is used to implement the method provided in the above first aspect, and its specific implementation will not be described in detail one by one. For the technical effects corresponding to any implementation manner in the solution provided in the above fourth aspect, reference may be made to the technical effects corresponding to any implementation manner in the first aspect above, and details are not described herein again.

[0050] It should be noted that, for any possible implementation manner in each of the above aspects, combinations can be made on the premise that the solutions do not conflict. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0052] Figure 1 Schematic diagram of the structure of a computer system provided for an exemplary embodiment;

[0053] Figure 2 Schematic diagram of the flow of a method for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment;

[0054] Figure 3 Schematic diagram of the flow of another method for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment;

[0055] Figure 4 Schematic diagram of the structure of a system for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment;

[0056] Figure 5 Schematic diagram of the structure of another system for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment;

[0057] Figure 6 Schematic diagram of the structure of a device for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment;

[0058] Figure 7 Schematic diagram of the structure of a computer device provided for an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0060] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or relative positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Without special instructions, in the case of meeting the relative positional relationship shown in the drawings, the above-described orientation description can be flexibly set during the actual application process.

[0061] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0062] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", and "communicated" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0063] In the embodiments of the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of another identical element in the process, article or device including that element.

[0064] In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean as an example, illustration or explanation. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

[0065] In the embodiments of the present application, at least one can also be described as one or more, and a plurality can be two, three, four or more, which is not limited in the present application.

[0066] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0067] For ease of understanding, the terms involved in the embodiments of this application are first explained.

[0068] Hydrocarbon dew point: It refers to the temperature at which, when natural gas or other gas mixtures are cooled under a specific pressure, the hydrocarbon components (such as methane, ethane, propane, etc.) contained in them start to condense into the first drop of liquid dew. The hydrocarbon dew point is crucial for processes such as the processing and transportation of natural gas or other gases. For example, if the temperature of natural gas is lower than the hydrocarbon dew point, liquid hydrocarbons in the natural gas will be precipitated, causing problems such as pipeline corrosion, blockage, or two-phase flow, affecting the transportation efficiency. The magnitude of the hydrocarbon dew point is related to gas composition, gas pressure, water vapor content, etc. For example, the higher the content of heavy hydrocarbons (such as C5+) in the gas, the higher the hydrocarbon dew point; the greater the gas pressure, the higher the hydrocarbon dew point.

[0069] Hydrocarbon dew point meter: It refers to a device that measures the temperature at which hydrocarbon components in natural gas or other gas mixtures start to condense into a liquid (i.e., the hydrocarbon dew point), and is usually applied in the fields of natural gas, gas turbines, etc. The measurement principles of hydrocarbon dew point meters mainly include the direct measurement method and the indirect calculation method. The direct measurement method, also known as the chilled mirror method, specifically cools the mirror surface, condenses the hydrocarbons in the gas, and then uses an optical or electrical sensor to detect the formation temperature of the first drop of liquid on the mirror surface, which is the hydrocarbon dew point, and is suitable for high-pressure and complex-component gases. The indirect calculation method is based on gas chromatography or spectral analysis. Specifically, first analyze the gas composition through gas chromatography (GC) or infrared spectroscopy (IR), and then calculate the hydrocarbon dew point using a thermodynamic model or formula, which is more suitable for real-time monitoring of hydrocarbon dew points.

[0070] Hydrocarbon dew point meter calibration: It refers to calibrating the accuracy of a hydrocarbon dew point meter in measuring the hydrocarbon dew point to ensure measurement accuracy and reduce process failures or safety hazards caused by incorrect dew point data in the natural gas industry, chemical industry, and energy fields. For example, when the mirror surface of a hydrocarbon dew point meter is contaminated or the condensation detector fails, resulting in a reading drift of a chilled mirror type hydrocarbon dew point meter, the mirror surface can be cleaned with anhydrous ethanol or the manufacturer can be contacted for repair.

[0071] It should be noted that the information involved in this application (including but not limited to device information, personal information of the object, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.), and signals are all authorized by the object or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards. For example, the measured values, reference values, theoretical values, etc. of hydrocarbon dew point involved in this application are all obtained under full authorization.

[0072] The general calibration method of hydrocarbon dew point meters in the industry is mainly based on the measured values and theoretical values of hydrocarbon dew point of standard gases by hydrocarbon dew point meters, which will be briefly described below.

[0073] Specifically, input the standard gas into the hydrocarbon dew point meter, measure the hydrocarbon dew point of the standard gas through the hydrocarbon dew point meter to obtain the measured value of hydrocarbon dew point. Calculate or query the theoretical value of the standard gas, and calibrate the hydrocarbon dew point meter according to the deviation degree between the measured value of hydrocarbon dew point and the theoretical value of hydrocarbon dew point of the standard gas until the deviation degree between the measured value of hydrocarbon dew point and the theoretical value of hydrocarbon dew point of the standard gas is within the allowable error range.

[0074] However, in the above technical solution, the hydrocarbon dew point meter is directly calibrated according to the measured value of hydrocarbon dew point and the calculated theoretical value of hydrocarbon dew point. When the hydrocarbon dew point meter is measured and calibrated online, the actual hydrocarbon dew point of the standard gas is easily interfered by environmental factors, and the calculated theoretical value cannot fit the standard gas in complex application scenarios, resulting in certain errors, thus reducing the accuracy of the calibration result of the hydrocarbon dew point meter.

[0075] Based on this, this application provides a calibration method for a hydrocarbon dew point meter. By measuring the hydrocarbon dew point of the standard gas with a standard hydrocarbon dew point meter and a hydrocarbon dew point meter respectively to obtain the measured value and the reference value, while realizing the online calibration of the hydrocarbon dew point meter, the measurement environments of the standard hydrocarbon dew point meter and the hydrocarbon dew point meter are the same, the interference of environmental factors is the same, the measured value is more suitable for the actual application scenario, and the calibration effect on the hydrocarbon dew point meter is better.

[0076] The solution provided by this application can be applied to Figure 1 the computer system shown in Figure 1 which is a schematic structural diagram of a computer system provided for an exemplary embodiment.

[0077] Exemplarily, the computer system includes a processor 100, a hydrocarbon dew point meter 101, and a standard hydrocarbon dew point meter 102. Optionally, the processor 100 may be a device for obtaining the hydrocarbon dew point measurement value obtained by the hydrocarbon dew point meter 101 for measuring the hydrocarbon dew point of a standard gas. The processor 100 may also be a device for obtaining the hydrocarbon dew point reference value obtained by the standard hydrocarbon dew point meter 102 for measuring the hydrocarbon dew point of a standard gas. The processor 100 may also be a device for calibrating the hydrocarbon dew point instrument according to the hydrocarbon dew point measurement value and the hydrocarbon dew point reference value. The processor 100 may also be a device for obtaining, calculating, or storing the theoretical hydrocarbon dew point value 103 of the standard gas. The processor 100 may also be a device for adjusting the pressure of the standard gas for the hydrocarbon dew point measurement by the hydrocarbon dew point meter 101 and the standard hydrocarbon dew point meter 102. The processor 100 may also be a device for displaying parameters such as the standard gas pressure, the hydrocarbon dew point measurement value, the theoretical hydrocarbon dew point value 103, and the hydrocarbon dew point reference value. The processor 100 may also be a device built into the hydrocarbon dew point meter 101 or the standard hydrocarbon dew point meter 102. The "obtaining" of the processor 100 includes any term with an obtaining function such as querying, discovering, extracting, etc., and the present application does not limit this.

[0078] Optionally, the standard hydrocarbon dew point meter 102 is a hydrocarbon dew point meter with a measurement accuracy higher than that of the hydrocarbon dew point meter 101, or the standard hydrocarbon dew point meter 102 is a hydrocarbon dew point meter with a measurement accuracy higher than the accuracy threshold. The number, type, and connection relationship of the processor 100, the hydrocarbon dew point meter 101, and the standard hydrocarbon dew point meter 102 are not limited to Figure 1 as shown in this application, and the present application does not limit this.

[0079] Figure 2 is a schematic flow chart of a method for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment. This method can be executed by a computer device. The computer device can be Figure 1 the processor 100 in this, or can also be other devices capable of implementing data processing and calibrating the hydrocarbon dew point meter.

[0080] As Figure 2 shown, the method for calibrating a hydrocarbon dew point meter provided in the embodiments of the present application may include:

[0081] Step S201: The computer device obtains the measurement value obtained by the hydrocarbon dew point meter for measuring the hydrocarbon dew point of the standard gas, and the reference value obtained by the standard hydrocarbon dew point meter for measuring the hydrocarbon dew point of the standard gas.

[0082] Among them, the standard gas refers to a gas with known and stable properties under specific conditions (such as temperature, pressure, composition, etc.), and is used for calibrating instruments, quality control, scientific research, or industrial detection, etc. For example: The standard gas is in a gas state at a temperature of 0 °C (273.15 K) and a pressure of 1 standard atmosphere (101.325 kPa). At this time, the volume of 1 mole of ideal gas is 22.4 liters.

[0083] Optionally, the standard gas can be a single-component gas, such as: high-purity nitrogen (N2), oxygen (O2), argon (Ar), etc.

[0084] The standard gas can also be a mixed gas, that is, a mixed gas prepared according to an exact ratio, such as: a mixed gas containing a specific concentration of carbon dioxide (CO2) and methane (CH4) (for calibration and environmental monitoring), a mixed gas containing a specific concentration of argon and carbon dioxide (for welding), a mixed gas containing medical oxygen and helium (He) (for medical use).

[0085] Hydrocarbon dew point measurement refers to determining the temperature at which natural gas or other hydrocarbon gas mixtures start to form liquid hydrocarbons (condense) at a specific pressure.

[0086] The standard gas has stable properties and usually has a clear theoretical value of hydrocarbon dew point. For example: the hydrocarbon dew point of high-purity methane is -161°C (the boiling point of methane). Therefore, by measuring the hydrocarbon dew point of the standard gas with a hydrocarbon dew point meter, the accuracy of the hydrocarbon dew point measurement by the hydrocarbon dew point meter can be judged.

[0087] Among them, the theoretical value of hydrocarbon dew point refers to the hydrocarbon dew point value calculated through thermodynamic models, gas state equations, etc.

[0088] Since the standard gas is easily affected by external environmental factors (such as temperature, air pressure, gas connection pipes, etc.) during specific applications, especially when online calibrating a hydrocarbon dew point meter, there may be a deviation between the theoretical value of the hydrocarbon dew point of the standard gas and the actual hydrocarbon dew point, and the calibration result of the hydrocarbon dew point meter is not precise enough. Therefore, in the embodiments of the present application, the hydrocarbon dew point meter is calibrated based on the reference value obtained by measuring the hydrocarbon dew point with a standard hydrocarbon dew point meter.

[0089] Among them, the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than the accuracy threshold, which is used as a reference hydrocarbon dew point meter for calibrating the hydrocarbon dew point meter.

[0090] Optionally, the accuracy threshold is a default value or a manually set value.

[0091] Exemplarily, a measurement accuracy higher than the accuracy threshold means that the deviation value between the test value obtained by measuring the hydrocarbon dew point with the hydrocarbon dew point meter and the theoretical value is within the deviation threshold range.

[0092] The measured value refers to the value obtained by measuring the hydrocarbon dew point of the standard gas with the hydrocarbon dew point meter to be calibrated. The reference value refers to the value obtained by measuring the hydrocarbon dew point of the same standard gas with the standard hydrocarbon dew point meter.

[0093] Step S202: The computer device calibrates the hydrocarbon dew point meter based on the measured value and the reference value.

[0094] Optionally, calibration includes methods such as automatic calibration and hardware calibration.

[0095] Among them, automatic calibration refers to calibration through the built-in calibration module of the hydrocarbon dew point meter.

[0096] Exemplarily, the built-in calibration module of the hydrocarbon dew point meter is controlled through the instrument panel or software (such as Modbus, HART protocol) to make the hydrocarbon dew point meter enter the calibration mode. The calibration mode includes two-point calibration and single-point calibration.

[0097] Among them, two-point calibration is applicable to offset calibration and slope calibration.

[0098] Exemplarily, the hydrocarbon dew point of the first standard gas and the second standard gas are measured respectively to obtain the hydrocarbon dew point measurement value of the first standard gas and the hydrocarbon dew point measurement value of the second standard gas. Then, the hydrocarbon dew point reference value or theoretical value of the first standard gas and the hydrocarbon dew point reference value or theoretical value of the second standard gas are input into the hydrocarbon dew point meter, and offset calibration and frequency calibration are performed through the built-in calibration module.

[0099] Among them, the first standard gas refers to a standard gas whose hydrocarbon dew point is within the high hydrocarbon dew point threshold range, or a standard gas whose hydrocarbon dew point is higher than that of the second standard gas.

[0100] The second standard gas refers to a standard gas whose hydrocarbon dew point is within the low hydrocarbon dew point threshold range, or a standard gas whose hydrocarbon dew point is lower than that of the first standard gas. For example: the hydrocarbon dew point of the first standard gas is -10°C, and the hydrocarbon dew point of the second standard gas is -10°C.

[0101] Single-point calibration is applicable to offset calibration.

[0102] Exemplarily, the hydrocarbon dew point of the standard gas is measured to obtain the hydrocarbon dew point test value of the standard gas, and then the hydrocarbon dew point reference value or theoretical value of the standard gas is input into the hydrocarbon dew point meter, and offset calibration is performed through the built-in calibration module.

[0103] Hardware calibration refers to calibration achieved through hardware adjustment of the mechanical hydrocarbon dew point meter. For example: for a mirror hydrocarbon dew point detector, the calibration can be achieved by adjusting the sensitivity of the optical sensor or the refrigeration power of the mirror hydrocarbon dew point detector. For a capacitive sensing hydrocarbon dew point meter, the calibration can be achieved by adjusting the potentiometer on the circuit board of the capacitive sensing hydrocarbon dew point meter.

[0104] Exemplarily, the hydrocarbon dew point meter is calibrated so that the deviation between the measurement value and the reference value or theoretical value is within the error tolerance range (such as ±1°C).

[0105] In summary, for the technical solution provided in this application, the hydrocarbon dew point of the standard gas is measured by a standard hydrocarbon dew point meter and a hydrocarbon dew point meter respectively to obtain the measured value and the reference value. While realizing the on-line calibration of the hydrocarbon dew point meter, the measurement environments of the standard hydrocarbon dew point meter and the hydrocarbon dew point meter are the same, and they are affected by the same environmental factors. The measured value is more in line with the actual application scenario, and the calibration effect on the hydrocarbon dew point meter is better.

[0106] Figure 3 FIG. 4 is a schematic flow chart of another method for calibrating a hydrocarbon dew point meter provided for an exemplary embodiment. This method can be executed by a computer device. The computer device can be Figure 1 the processor 100 in FIG. 1, or other devices capable of realizing data processing and calibrating the hydrocarbon dew point meter. This method includes:

[0107] Step S301: The computer device inputs the standard gas under the set pressure into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively for hydrocarbon dew point measurement, and obtains the measured value and the reference value.

[0108] Among them, the hydrocarbon dew point of the standard gas is the temperature at which the gas-liquid two-phase is in equilibrium. An increase in pressure will change the saturated vapor pressure of hydrocarbons, thereby affecting the size of the hydrocarbon dew point. Therefore, the standard gas under different set pressures has different hydrocarbon dew points.

[0109] Exemplarily, when the pressure increases, the hydrocarbons in the standard gas are more likely to liquefy, and the hydrocarbon dew point of the standard gas increases. When the pressure decreases, the hydrocarbons in the standard gas are less likely to liquefy, and the hydrocarbon dew point of the standard gas decreases.

[0110] For example: at a pressure of 1 bar, the hydrocarbon dew point of methane is -161.5 °C, and the hydrocarbon dew point of propane is -42.1 °C. At a pressure of 10 bar, the hydrocarbon dew point of methane is -120.2 °C, and the hydrocarbon dew point of propane is +15.3 °C. At a pressure of 50 bar, the hydrocarbon dew point of methane is -85.7 °C, and the hydrocarbon dew point of propane is +68.5 °C.

[0111] In some embodiments, in order to avoid inaccurate measurement caused by accidental errors, the computer device inputs the standard gas into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively, performs multiple hydrocarbon dew point measurements, and calibrates the hydrocarbon dew point meter according to the measured values and reference values obtained from the multiple measurements.

[0112] Exemplarily, multiple test values output by the hydrocarbon dew point meter and the reference values output by the standard hydrocarbon dew point meter are collected, the means of the multiple test values and reference values are obtained respectively, and the hydrocarbon dew point meter is calibrated.

[0113] In some embodiments, the computer device inputs standard gases under different set pressures or standard gases with different hydrocarbon dew points into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively for hydrocarbon dew point measurement, obtains multiple sets of measurement values and reference values, and calibrates the hydrocarbon dew point meter according to the multiple sets of measurement values and reference values. For example: Select standard gases corresponding to hydrocarbon dew points of -30°C, -20°C, -10°C, 0°C, 10°C, and 20°C for calibrating the hydrocarbon dew point meter.

[0114] Exemplarily, the manner in which the computer device calibrates the hydrocarbon dew point meter according to multiple sets of measurement values and reference values is as follows, but is not limited thereto.

[0115] Method 1: The computer device calibrates the hydrocarbon dew point meter multiple times according to each set of measurement values and reference values respectively.

[0116] Method 2: The computer device respectively calculates the average values of the measurement values and reference values, and calibrates the hydrocarbon dew point meter.

[0117] In some embodiments, in order to ensure that each hydrocarbon dew point measurement is not interfered by the gas remaining from the previous hydrocarbon dew point measurement, after a single hydrocarbon dew point measurement or calibration of the hydrocarbon dew point meter, the hydrocarbon dew point meter and the standard hydrocarbon dew point are purged with nitrogen.

[0118] Exemplarily, the standard gas can be a mixed gas of nitrogen and butane. After a single hydrocarbon dew point measurement or calibration of the hydrocarbon dew point meter, the output of butane is stopped, and the hydrocarbon dew point meter and the standard hydrocarbon dew point meter can be directly purged with nitrogen. The cost of nitrogen is relatively low, which reduces the cost of the standard gas while achieving the purging of the hydrocarbon dew point meter and the standard hydrocarbon dew point meter.

[0119] In some embodiments, in order to control variables and reduce the difference in hydrocarbon dew point measurement between the hydrocarbon dew point meter and the standard hydrocarbon dew point meter, the outlet gas flow rates of the hydrocarbon dew point meter and the standard hydrocarbon dew point meter are the same.

[0120] In some embodiments, in order to more closely match the gas flow state measured by the hydrocarbon dew point meter during actual operation, the gas flow rates at the outlets of the hydrocarbon dew point meter and the standard hydrocarbon dew point meter are adjusted through a regulating valve or the like.

[0121] For other introductions of this step, reference can be made to step S201, and no further elaboration will be made here.

[0122] Step S302: The computer device calculates the difference between the measurement value and the reference value to obtain a calibration value, and calibrates the hydrocarbon dew point meter based on the calibration value.

[0123] Among them, the formula for the calibration value can be expressed as:

[0124] T = T a - T b

[0125] Among them, T represents the calibration value, T a represents the measured value, and T b represents the reference value.

[0126] Optionally, the calibration value can be calculated by the built-in calibration module of the hydrocarbon dew point meter, or by an external processor of the hydrocarbon dew point meter.

[0127] In some embodiments, to ensure the measurement accuracy of the hydrocarbon dew point of the standard hydrocarbon dew point meter, the deviation value of the theoretical value of the hydrocarbon dew point of the reference gas relative to the standard gas is calculated. When the deviation value is within the deviation threshold range, the hydrocarbon dew point meter is calibrated based on the measured value and the reference value. When the deviation value is not within the deviation threshold range, replace the hydrocarbon dew point meter with a deviation value within the deviation threshold range as the standard hydrocarbon dew point meter, or first calibrate the standard hydrocarbon dew point meter to make the deviation value of the standard hydrocarbon dew point meter within the deviation threshold range.

[0128] Among them, the calculation formula of the theoretical value is as follows, but not limited to this:

[0129] Formula 1:

[0130]

[0131] Among them, P represents the set pressure of the standard gas, T represents the theoretical value, and A, B, and C represent the constants of the standard gas.

[0132] Formula 2:

[0133]

[0134] Among them, P represents the set pressure of the standard gas, T represents the theoretical value, R represents the gas constant, v represents the molar volume, α represents the gravitational term parameter, and b represents the repulsive term parameter.

[0135] Specifically, α is a function of temperature, and b is related to the size of the standard gas. Formula 2 can correct the influence of the intermolecular force of the standard gas, and the calculated theoretical value of the hydrocarbon dew point is closer to the actual hydrocarbon dew point value of the standard gas. Therefore, it is preferred to calculate the theoretical value of the hydrocarbon dew point by Formula 2.

[0136] The results of calculating the theoretical values of the hydrocarbon dew points of the standard gas (propane) at different set pressures by Formula 1 are shown in Table 1.

[0137] Table 1: Corresponding table of standard gas pressure and theoretical value of hydrocarbon dew point

[0138] Theoretical hydrocarbon dew point (°C) Set pressure (MPa) -21.0 0.235808286 -16.0 0.281686155 -10.0 0.345248017 -5.0 0.405915708 0.0 0.474138976 5.0 0.550438328 10.0 0.635330831 15.0 0.729327697

[0139] The results of calculating the theoretical values of the hydrocarbon dew points of the standard gas (10% butane + 90% nitrogen) at different set pressures by Formula 2 are shown in Table 2.

[0140] Table 2: Corresponding Table of Standard Gas Pressure and Theoretical Value of Hydrocarbon Dew Point

[0141]

[0142]

[0143] Optionally, the computer device calculates the theoretical value of the hydrocarbon dew point of the standard gas in real time, or the computer device pre-calculates the theoretical value of the hydrocarbon dew point of the standard gas at different set pressures, and directly calls the calculated theoretical value of the hydrocarbon dew point when calibrating the hydrocarbon dew point meter.

[0144] In summary, the technical solution provided by this application calibrates the standard hydrocarbon dew point meter through the theoretical value of the standard gas, and then measures the hydrocarbon dew point of the standard gas through the standard hydrocarbon dew point meter and the hydrocarbon dew point meter respectively to obtain the measured value and the reference value. While ensuring the measurement accuracy of the standard hydrocarbon dew point meter and realizing the on-line calibration of the hydrocarbon dew point meter, the measurement environments of the standard hydrocarbon dew point meter and the hydrocarbon dew point meter are the same, the interference of environmental factors is the same, the measured value is more in line with the actual application scenario, and the calibration effect on the hydrocarbon dew point meter is better.

[0145] The above embodiments describe the hydrocarbon dew point meter calibration method provided by this application. Next, a hydrocarbon dew point meter calibration system for implementing the hydrocarbon dew point meter calibration method will be described in detail.

[0146] Figure 4 It is a schematic structural diagram of a hydrocarbon dew point meter calibration system provided for an exemplary embodiment. As Figure 4 shown, the hydrocarbon dew point meter calibration system includes: gas cylinders 401, 402, pressure regulators 403, 404, digital pressure gauge 405, hydrocarbon dew point meter 406, standard hydrocarbon dew point meter 407, and processor 408. The processor 408 is respectively connected to the pressure regulators 403, 404, digital pressure gauge 405, hydrocarbon dew point meter 406, and standard hydrocarbon dew point meter 407.

[0147] Among them, the standard hydrocarbon dew point meter 407 refers to a hydrocarbon dew point meter with a measurement accuracy higher than the accuracy threshold.

[0148] The gas cylinders 401 and 402 are used to supply standard gases at set pressures to the hydrocarbon dew point meter 406 and the standard hydrocarbon dew point meter 407 respectively.

[0149] Among them, the standard gas refers to a gas with known and stable properties under specific conditions (such as temperature, pressure, composition, etc.), and is used for calibrating instruments, quality control, scientific research, or industrial detection, etc.

[0150] Exemplarily, the gas cylinder 401 is used to supply nitrogen, and the gas cylinder 402 is used to supply butane.

[0151] In some embodiments, the above-mentioned gas cylinder 401 is further configured to: after a single hydrocarbon dew point measurement, output nitrogen to purge the hydrocarbon dew point meter 406 and the standard hydrocarbon dew point 407.

[0152] The pressure regulator 403 is used to regulate the pressure of the gas output by the gas cylinder 401, and the pressure regulator 404 is used to regulate the pressure of the gas output by the gas cylinder 402.

[0153] The inlet of the digital pressure gauge 405 receives the mixed gas output by the gas cylinder 401 and the gas cylinder 402. The outlet of the digital pressure gauge 405 is respectively connected to the hydrocarbon dew point meter 406 and the standard hydrocarbon dew point meter 407 through a tee, and is used to deliver the standard gas to the hydrocarbon dew point meter 406 and the standard hydrocarbon dew point meter 407, and measure and display the pressure of the standard gas delivered to the hydrocarbon dew point meter 406 and the standard hydrocarbon dew point meter 407.

[0154] The hydrocarbon dew point meter 406 is used to measure the hydrocarbon dew point of the standard gas to obtain a measured value.

[0155] The standard hydrocarbon dew point meter 407 is used to measure the hydrocarbon dew point of the standard gas under a set pressure to obtain a reference value.

[0156] The processor 408 is used to calibrate the hydrocarbon dew point meter 406 based on the measured value and the reference value.

[0157] In some embodiments, the above-mentioned processor 408 is further configured to: calculate the difference between the measured value and the reference value to obtain a calibration value, and calibrate the hydrocarbon dew point meter 406 based on the calibration value.

[0158] In some embodiments, the above-mentioned processor 408 is further configured to: calculate the deviation value of the reference value relative to the theoretical value of the hydrocarbon dew point of the standard gas. When the deviation value is within the deviation threshold range, calibrate the hydrocarbon dew point meter 406 based on the measured value and the reference value. The calculation formula of the theoretical value is as follows:

[0159]

[0160] Wherein, P represents the set pressure of the standard gas, T represents the theoretical value, R represents the gas constant, v represents the molar volume, α represents the gravitational term parameter, and b represents the repulsive term parameter.

[0161] In some embodiments, the hydrocarbon dew point meter calibration system provided by the embodiments of the present application further includes a flow regulating valve, and the flow regulating valve is used to regulate the outlet gas flow rate of the hydrocarbon dew point meter 406 and the standard hydrocarbon dew point meter 407.

[0162] Figure 5 Schematic diagram of the structure of another hydrocarbon dew point meter calibration system provided for an exemplary embodiment. As Figure 5As shown in the figure, the hydrocarbon dew point meter calibration system includes: a gas cylinder 501, a pressure regulator 502, a digital pressure gauge 503, a hydrocarbon dew point meter 504, a flow regulating valve 505, a gas flow meter 506, and a processor 507. The processor 507 is respectively connected to the pressure regulator 502, the digital pressure gauge 503, the hydrocarbon dew point meter 504, the flow regulating valve 505, and the gas flow meter 506.

[0163] Among them, the gas cylinder 501 is used to store and deliver standard gas to the hydrocarbon dew point meter 504. By controlling the pressure regulator 502 at the bottle mouth of the gas cylinder 501, standard gas at a set pressure can be filled into the hydrocarbon dew point meter 504.

[0164] The digital pressure gauge 503 is connected between the gas cylinder 501 and the hydrocarbon dew point meter 504, and is used to measure and display the pressure of the standard gas delivered to the hydrocarbon dew point meter 504.

[0165] Exemplarily, the standard gas in the gas cylinder 501 is pure propane.

[0166] The hydrocarbon dew point meter 504 is used to measure the hydrocarbon dew point of the standard gas under a set pressure and output a hydrocarbon dew point measurement value.

[0167] The flow regulating valve 505 is used to adjust the flow rate of the gas outlet of the hydrocarbon dew point meter 504 according to the flow rate output requirement.

[0168] Among them, the flow rate output requirement refers to the requirement of the gas measured during the actual application of the hydrocarbon dew point meter 504.

[0169] Exemplarily, the processor needs to adjust the gas outlet flow rate of the hydrocarbon dew point meter 504 based on the flow rate output range given by the manufacturer of the hydrocarbon dew point meter 504, so that the gas outlet of the hydrocarbon dew point meter 504 is within the flow rate output range.

[0170] The gas flow meter 506 is used to measure the gas outlet flow rate of the hydrocarbon dew point meter 504.

[0171] The processor 507 is used to obtain the hydrocarbon dew point measurement value output when the hydrocarbon dew point meter 504 measures the hydrocarbon dew point of the standard gas under a set pressure; determine the theoretical value of the hydrocarbon dew point of the standard gas under the set pressure according to the set pressure; then determine the difference between the measurement value and the theoretical value, that is, the calibration value, based on the hydrocarbon dew point measurement value and the hydrocarbon dew point theoretical value; and finally calibrate the hydrocarbon dew point meter 504 based on the calibration value.

[0172] The above mainly introduces the solution provided by this application. Correspondingly, this application also provides a hydrocarbon dew point meter calibration device, which is used to implement the above method embodiment.

[0173] Such as Figure 6Schematic structural diagram of the hydrocarbon dew point meter calibration device shown. The hydrocarbon dew point meter calibration device may include an acquisition module 601 and a calibration module 602. Among them, the acquisition module 601 is used to execute Figure 2 the operation of step S201 in the method illustrated, and Figure 3 the operation of step S301 in the method illustrated; the calibration module 602 is used to execute Figure 2 the operation of step S202 in Figure 3 the method illustrated, and the operation of step S302 in the method illustrated.

[0174] In some embodiments, in order to implement the above functions, the hydrocarbon dew point meter calibration device includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0175] The embodiments of the present application can divide the function modules of the hydrocarbon dew point meter calibration device according to the above method embodiments. For example, each function module can be divided corresponding to each function, or two or more functions can be integrated into one calibration module. The above integrated module can be implemented in the form of hardware or in the form of a software function module. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0176] As Figure 7 shown, the computer device provided by the embodiments of the present application may include a processor 701, a bus 702, a communication interface 703, and a memory 704. The processor 701, the memory 704, and the communication interface 703 communicate through the bus 702. It should be understood that the present application does not limit the number of processors and memories in the network device.

[0177] The bus 702 may be a PCI bus or an extended industry standard architecture (EISA) bus, or a UB bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 7It is represented by only one line in the figure, but it does not mean that there is only one bus or one type of bus. The bus 702 may include a path for transmitting information between various components of the network device (for example, the memory 704, the processor 701, and the communication interface 703).

[0178] The processor 701 may include any one or more of processors such as a CPU, a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP).

[0179] The memory 704 may include a volatile memory, such as a random access memory (RAM). The processor 701 may also include a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid state drive (SSD).

[0180] The communication interface 703 uses a transceiver module such as, but not limited to, a network interface card or a transceiver to implement communication between the network device and other devices or a communication network.

[0181] The memory 704 stores executable program code, and the processor 701 executes the executable program code to respectively implement the functions of the foregoing method embodiments. That is, the memory 704 stores instructions for executing the above hydrocarbon dew point meter calibration method.

[0182] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of description, only the above division of each functional module is used as an example. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the module is divided into different functional modules to complete all or part of the functions described above. The specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here.

[0183] Since the hydrocarbon dew point meter calibration module, the computer-readable storage medium, and the computer program product in the embodiments of the present invention can be applied to the above method, the technical effects that can be obtained can also refer to the foregoing method embodiments and will not be repeated here.

[0184] The method steps in this embodiment can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory (RAM), flash memory, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically EPROM (EEPROM), registers, hard disks, removable hard disks, CD-ROMs, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a network device. Of course, the processor and the storage medium can also exist as discrete components in a network device.

[0185] In the above embodiment, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions of the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable modules. The computer program or instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); or it can be a semiconductor medium, such as a solid state drive (SSD).

[0186] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A calibration method for a hydrocarbon dew point meter, characterized in that, The method includes: Obtaining a measurement value obtained by a hydrocarbon dew point meter measuring the hydrocarbon dew point of a standard gas, and a reference value obtained by a standard hydrocarbon dew point meter measuring the hydrocarbon dew point of the standard gas, where the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than an accuracy threshold; Calibrating the hydrocarbon dew point meter based on the measurement value and the reference value.

2. The method according to claim 1, wherein The obtaining a measurement value obtained by a hydrocarbon dew point meter measuring the hydrocarbon dew point of a standard gas, and a reference value obtained by a standard hydrocarbon dew point meter measuring the hydrocarbon dew point of the standard gas includes: Inputting the standard gas under a set pressure into the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively for hydrocarbon dew point measurement to obtain the measurement value and the reference value.

3. The method according to claim 2, wherein The method further includes: After a single hydrocarbon dew point measurement, purging the hydrocarbon dew point meter and the standard hydrocarbon dew point meter with nitrogen.

4. The method according to claim 1, wherein The calibrating the hydrocarbon dew point meter based on the measurement value and the reference value includes: Calculating the difference between the measurement value and the reference value to obtain a calibration value; Calibrating the hydrocarbon dew point meter based on the calibration value.

5. The method according to any one of claims 1 to 4, characterized in that, The outlet gas flow rates of the hydrocarbon dew point meter and the standard hydrocarbon dew point meter are the same.

6. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Calculating a deviation value of the reference value relative to the theoretical value of the hydrocarbon dew point of the standard gas; When the deviation value is within a deviation threshold range, calibrating the hydrocarbon dew point meter based on the measurement value and the reference value.

7. The method according to claim 6, wherein The calculation formula of the theoretical value is as follows: Where, P represents the set pressure of the standard gas, T represents the theoretical value, R represents the gas constant, v represents the molar volume, α represents the gravitational term parameter, and b represents the repulsive term parameter.

8. A hydrocarbon dew point meter calibration system, characterized in that, The system includes: a gas cylinder, a pressure regulator, a hydrocarbon dew point meter, a standard hydrocarbon dew point meter, and a processor, where the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than an accuracy threshold; The gas cylinder is used to supply the standard gas to the hydrocarbon dew point meter and the standard hydrocarbon dew point meter respectively; The hydrocarbon dew point meter is used to measure the hydrocarbon dew point of the standard gas to obtain a measurement value; The standard hydrocarbon dew point meter is used to measure the hydrocarbon dew point of the standard gas to obtain a reference value; The processor is used to calibrate the hydrocarbon dew point meter based on the measurement value and the reference value.

9. A hydrocarbon dew point calibrator, characterized in that, The device includes: An acquisition module, configured to obtain a measurement value obtained by a hydrocarbon dew point meter measuring the hydrocarbon dew point of a standard gas, and a reference value obtained by a standard hydrocarbon dew point meter measuring the hydrocarbon dew point of the standard gas, where the standard hydrocarbon dew point meter refers to a hydrocarbon dew point meter with a measurement accuracy higher than an accuracy threshold; A calibration module, configured to calibrate the hydrocarbon dew point meter based on the measurement value and the reference value.

10. A computer device, characterized in that, The computer device includes: a processor and a memory, and at least one computer program is stored in the memory, and at least one of the computer programs is loaded and executed by the processor to implement the hydrocarbon dew point meter calibration method according to any one of claims 1 to 7.

Images