A device and method for dynamic preparation of continuous light hydrocarbon standards

Abstract

This invention relates to the field of continuous light hydrocarbon technology, specifically to a device and method for dynamic configuration of continuous light hydrocarbon standards; it includes a main body, a drive unit, a sample injection component, and a sample discharge component; the main body includes a constant temperature layer arranged from the outside to the inside and a sample preparation chamber, the sample preparation chamber including a first chamber and a second chamber, wherein the opposite ends of the first chamber and the second chamber are respectively connected to the drive unit; this device can realize the overall automated operation of the process, significantly reducing the intensity of manual intervention and operational errors; the standard concentration output by this device is accurate, stable, and has good repeatability, which can effectively suppress the systematic error caused by the deviation of the standard concentration of the light hydrocarbon instrument, keeping the error of its detection of hydrocarbon component content within a low range, significantly improving the reliability of oil, gas, and water layer identification and evaluation results, providing solid data support for oil exploration and development, and reducing exploration decision-making risks.

Description

Technical Field

[0001] This invention relates to the field of continuous light hydrocarbon technology, and specifically to a device and method for dynamic configuration of continuous light hydrocarbon standards. Background Technology

[0002] In the field of oil exploration and development, the continuous light hydrocarbon analyzer is a core analytical device for determining the properties of oil and gas and evaluating water-flooded layers. The accuracy of its detection data directly affects the reliability of the comprehensive reservoir evaluation results. This device provides geologists with key evidence for identifying oil, gas and water layers by analyzing the distribution characteristics of light hydrocarbon components in formation fluids. However, in actual exploration, the special physical properties of heavy components (usually accounting for less than 15%) have become a key bottleneck restricting the improvement of instrument performance.

[0003] Heavy components have high boiling points, with some components even exceeding 300℃. Currently widely used bottled pre-formed gas standards are prone to condensation and liquefaction in environments below 50℃. According to experimental data, when the ambient temperature is 25℃, the actual vaporization rate of C6-C8 heavy components in the gas cylinder is less than 60% of the theoretical value, which means that during the calibration process, the concentration of the standard sample entering the instrument will be significantly lower than the preset value.

[0004] The systematic error caused by this concentration deviation will be amplified step by step in the analysis of light hydrocarbon instruments, eventually leading to an error of more than ±15% in the content of hydrocarbon components detected by the instrument. This error will seriously interfere with the reliability of the oil, gas and water layer discrimination model and the accuracy of oil and gas property evaluation, bringing potential risks to exploration decisions. Summary of the Invention

[0005] To address the problems mentioned in the prior art, this invention proposes a dynamic configuration device and method for continuous light hydrocarbon standards. This device fully utilizes the high-temperature boiling point characteristics of heavy components, ensuring that heavy components remain in a gaseous state. Simultaneously, a dynamic feedback correction mechanism is established, which can accurately configure the standard concentration in real time according to the calibration requirements of the continuous light hydrocarbon analyzer. This effectively solves the problem of standard concentration deviation, significantly improves the accuracy of the continuous light hydrocarbon analyzer's calibration, enhances its operational stability, and provides reliable technical support for determining oil and gas properties and identifying water-flooded layers during oil and gas exploration and development, thereby reducing exploration decision-making risks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention proposes a continuous light hydrocarbon standard sample dynamic configuration device, comprising a device body, a drive unit, a sample injection component, and a sample discharge component;

[0008] The main body of the device includes a constant temperature layer arranged from the outside to the inside and a sample preparation chamber. The sample preparation chamber includes a first chamber and a second chamber, wherein the first chamber and the second chamber are respectively connected to the drive unit at opposite ends.

[0009] The sample introduction component is located at the bottom of the main body of the device and includes a sample inlet, at least one air inlet and at least one sample gas inlet; one end of the sample inlet is connected to the sample preparation chamber and the other end is connected to the air inlet and the sample gas inlet; the end of the sample inlet connected to the sample preparation chamber is provided with an inlet one-way valve.

[0010] The sample dispensing assembly is located on the top of the main body of the device and includes a sample dispensing outlet, a standard sample output outlet and a waste outlet. One end of the sample dispensing outlet is connected to the sample dispensing chamber, and the other end is connected to the standard sample output outlet and the waste outlet. An outlet flow valve is provided at the end of the sample dispensing outlet connected to the sample dispensing chamber.

[0011] As a further improvement of the present invention, the constant temperature layer includes a heat insulation layer, a heating layer and a heat conduction layer arranged sequentially from the outside to the inside.

[0012] As a further improvement of the present invention, the drive unit includes a first drive unit connected to the first compartment and a second drive unit connected to the second compartment;

[0013] The first drive unit includes a first piston, a first motor, and a first screw; the first piston is slidably disposed in the first chamber, and one end of the first piston is connected to the first screw. The first motor drives the first screw to drive the first piston to reciprocate within the first chamber.

[0014] The second drive unit includes a second piston, a second motor, and a second screw; the second piston is slidably disposed in the second chamber, and one end of the second piston is connected to the second screw. The second motor drives the second screw to drive the second piston to reciprocate within the second chamber.

[0015] As a further improvement of the present invention, both the air inlet and the sample gas inlet are equipped with flow valves and check valves.

[0016] As a further improvement of the present invention, the end of the sample inlet connected to the air inlet and the sample gas inlet is also provided with a first flow valve and a second flow valve.

[0017] As a further improvement of the present invention, an electromagnetic valve is provided between the sample preparation outlet and the standard sample output outlet and the waste outlet.

[0018] As a further improvement of the present invention, a partition net is provided in the center of the sample preparation chamber, which divides the sample preparation chamber into a first chamber and a second chamber of the same size.

[0019] The compartment partition has a number of mesh openings.

[0020] Secondly, this invention proposes a method for the dynamic configuration of continuous light hydrocarbon standards, implemented using the aforementioned apparatus, comprising the following steps:

[0021] S1. The sample preparation chamber is heated to a predetermined temperature by a constant temperature layer and then kept at a constant temperature.

[0022] S2. Control the movement of the drive unit to vent the residual gas in the sample preparation chamber; open the sample gas inlet and inject one or more liquid sample gases into the first chamber according to the preset ratio. The liquid sample gas vaporizes after entering the first chamber.

[0023] S3. Open the air inlet and inject air into the first chamber according to the preset ratio to mix the air with the sample gas. Control the drive unit to achieve reciprocating motion according to the mixing time to transport the mixed gas in the first chamber to the second chamber, and then transport the mixed gas in the second chamber from the second chamber to the first chamber to achieve uniform mixing of air and sample gas and obtain standard gas of predetermined concentration.

[0024] S4. The standard gas is delivered to the light hydrocarbon analyzer via the standard sample output port through the drive unit for calibration.

[0025] S5. After calibration, the drive unit is retracted and reset. Air is injected into the sample preparation chamber through the air inlet. The drive unit is controlled to move and the air is discharged through the waste outlet to clean the device.

[0026] As a further improvement of the present invention, the preset ratios in S2 and S3 are determined based on a target concentration, the expression for which is as follows:

[0027]

[0028] In the formula: The target concentration; The concentration of the sample gas; The volume of the sample gas; For air volume;

[0029] The mixing time in S3 The expression is as follows:

[0030]

[0031] In the formula: K is the mixing coefficient; This refers to the volume of the sample preparation chamber; The initial concentration range; Total flow; This represents the initial maximum concentration. The initial minimum concentration;

[0032] The amount of air injected into the first chamber in step S3 is dynamically compensated based on the actual temperature of the sample preparation chamber, and its expression is as follows:

[0033]

[0034] In the formula: Theoretical airflow rate; The temperature compensation coefficient is set to 0.008 / ℃. Indicates the amount of air injected; To set the temperature value; This refers to the actual temperature value of the sample preparation chamber;

[0035] After S3 and before S4, a feedback correction is performed. This involves comparing the real-time measured standard concentration with the target concentration to adjust the injected air volume in real time before repeating S3. The correction formula is as follows:

[0036]

[0037] In the formula: The corrected amount of air injected; The current amount of air; K f This represents the feedback coefficient, with a value ranging from 0.3 to 0.8. This refers to the concentration of the standard sample measured in real time.

[0038] Compared with the prior art, the present invention achieves the following technical effects:

[0039] The device of this invention realizes automatic dynamic configuration of light hydrocarbon standards. The constant temperature layer ensures that the sample preparation chamber is kept at a constant temperature, effectively preventing the condensation of heavy components of light hydrocarbons and ensuring complete vaporization of the sample gas. The reciprocating motion achieved by the drive unit effectively promotes uniform gas mixing. The sample inlet and outlet components ensure unidirectional airflow and avoid cross-contamination. The entire device has a high degree of automation, which significantly improves the accuracy, stability and repeatability of the standard concentration.

[0040] The constant temperature layer of this invention includes a heat insulation layer, a heating layer, and a heat-conducting layer arranged sequentially. It can accurately maintain a constant temperature in the sample preparation chamber, ensuring that the temperature inside the sample preparation chamber is always higher than the boiling point of the light hydrocarbon heavy components. This ensures that heavy components such as C6-C8 are completely vaporized, thereby avoiding the condensation phenomenon of heavy components such as C6-C8 during the standard sample preparation process. It also avoids the situation where traditional bottled standard samples are less than 60% concentrated at 25°C, thus ensuring the accuracy and consistency of the standard sample concentration.

[0041] This invention, by setting multiple sample gas inlets and air inlets, each equipped with a flow valve and a check valve, combined with a control module, can achieve precise proportional injection of various sample gases and air. Based on the target concentration calculation formula, mixing time formula, and temperature dynamic compensation formula, the device can automatically calculate and adjust the injection volume of sample gas and air according to the set concentration. In particular, it can perform real-time compensation of air flow in high-temperature environments, further improving the sample preparation accuracy.

[0042] The sample preparation chamber of this invention is equipped with a partition mesh, which divides the sample preparation chamber into a first chamber and a second chamber. The mixed gas is reciprocated between the first and second chambers through a first drive unit and a second drive unit, which enhances gas convection and diffusion and significantly improves the mixing uniformity. This device can detect the concentration of the standard sample in real time after the air and sample gas are mixed, and dynamically adjust the air injection volume based on a feedback correction formula. This effectively eliminates the sample preparation deviation caused by environmental fluctuations, changes in equipment status, and other factors, further improving the accuracy of the output standard sample concentration and meeting the requirements of high-precision calibration.

[0043] This device enables automated operation of the entire process. Users only need to set the target concentration and temperature parameters, and the device can automatically complete all steps, significantly reducing the intensity of manual intervention and operational errors. The standard sample concentration output by this device is accurate, stable, and has good repeatability. It can effectively suppress the systematic error caused by the deviation of the standard sample concentration in the light hydrocarbon analyzer, keeping the error of its detection of hydrocarbon component content within a low range. This significantly improves the reliability of oil, gas, and water layer identification and evaluation results, provides solid data support for oil exploration and development, and reduces exploration decision-making risks. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the device in this embodiment;

[0045] Figure 2 This is a schematic diagram of the method flow in this embodiment.

[0046] Reference numerals in the attached drawings: 1. Main body of the device; 2. Insulation layer; 3. Heating layer; 4. Heat-conducting layer; 5. Waste outlet; 6. Standard sample output outlet; 7. Compartment partition; 8. First compartment; 9. First piston; 10. First motor; 11. First screw; 12. Inlet check valve; 13. Outlet check valve; 14. Second compartment; 15. Second piston; 16. Second motor; 17. Second screw; 18. Air inlet A; 19. Sample gas inlet A; 20. Sample gas inlet B; 21. Sample gas inlet C; 22. Sample gas inlet D; 23. Sample gas inlet E; 24. Air inlet B; 25. Flow valve; 26. First check valve; 27. Second check valve. Detailed Implementation

[0047] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0053] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0054] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0055] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0056] See Figure 1 This invention proposes a continuous light hydrocarbon standard dynamic configuration device, including a device body 1, a drive unit, a sample injection component, and a sample discharge component;

[0057] The main body 1 of the device includes a constant temperature layer arranged from the outside to the inside and a sample preparation chamber. The sample preparation chamber includes a first chamber body 8 and a second chamber body 14, wherein the first chamber body 8 and the second chamber body 14 are respectively connected to the drive unit at opposite ends.

[0058] The sample introduction component is located at the bottom of the main body 1 of the device and includes a sample inlet, at least one air inlet and at least one sample gas inlet; one end of the sample inlet is connected to the sample preparation chamber and the other end is connected to the air inlet and the sample gas inlet; an inlet flow valve 12 is provided at the end of the sample inlet connected to the sample preparation chamber.

[0059] The sample dispensing assembly is located on the top of the main body 1 of the device and includes a sample dispensing outlet, a standard sample output port 6 and a waste port 5. One end of the sample dispensing outlet is connected to the sample dispensing chamber, and the other end is connected to the standard sample output port 6 and the waste port 5. An outlet flow valve 13 is provided at the end of the sample dispensing outlet connected to the sample dispensing chamber.

[0060] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0061] In this embodiment, the device includes a main body 1, a drive unit, a sample injection assembly, and a sample dispensing assembly. The main body 1 is composed of a multi-layer structure, including, from the outside to the inside, a heat insulation layer 2, a heating layer 3, a heat-conducting layer 4, and a sample preparation chamber.

[0062] Specifically, in this embodiment, the insulation layer 2 is made of heat-insulating material, preferably a polymeric heat-insulating material such as ceramic fiber or polyurethane foam. The polymeric heat-insulating material can effectively reduce heat loss, keeping the surface temperature of the main body 1 and the ambient temperature difference within 10°C, thereby effectively preventing heat loss. The heating layer 3 provides a stable heat source according to the set temperature, preferably using a nickel-chromium alloy resistance wire as the heating element. With the temperature control algorithm of the control module, the temperature fluctuation can be controlled within ±0.5°C. The heat-conducting layer 4 ensures that heat is evenly transferred to the sample preparation chamber, keeping the temperature inside the sample preparation chamber always higher than the boiling point of the heavy components, thereby avoiding condensation. Preferably, the heat-conducting layer 4 is made of aluminum alloy or copper alloy material with a high thermal conductivity, which can ensure that heat is quickly and evenly transferred to the entire space of the sample preparation chamber.

[0063] In this embodiment, the sample preparation chamber is divided into a first chamber 8 and a second chamber 14 by a partition mesh 7. Specifically, the partition mesh 7 is located in the middle of the sample preparation chamber, dividing the sample preparation chamber into a first chamber 8 and a second chamber 14 with the same structural size. In addition, the partition mesh 7 is provided with a number of mesh holes, which are used to promote convection and diffusion during gas mixing and improve the mixing uniformity.

[0064] Specifically, the compartment mesh 7 is preferably made of 316L stainless steel, and the mesh size is 0.5 to 1.0 mm. This mesh size range can ensure gas permeability and promote turbulence formation, thereby generating a strong vortex effect during the gas mixing process and further improving the mixing efficiency.

[0065] In this embodiment, the driving unit includes a first driving unit and a second driving unit. The first driving unit is disposed in the first compartment 8, and the second driving unit is disposed in the second compartment 14. The first driving unit and the second driving unit have the same structure. The first driving unit includes a first piston 9, a first motor 10, and a first screw 11. The first piston 9 is slidably disposed in the first compartment 8, and one end of the first piston 9 is connected to the first screw 11. The second driving unit includes a second piston 15, a second motor 16, and a second screw 17. The second piston 15 is slidably disposed in the second compartment 14, and one end of the second piston 15 is connected to the second screw 17.

[0066] Specifically, the first motor 10 and the second motor 16 are stepper motors. The first piston 9 is adapted to the size of the first chamber 8, and the second piston 15 is adapted to the size of the second chamber 14. The first piston 9 and the second piston 15 can reciprocate under the action of the first screw 11 and the second screw 17. The movement speed of the first piston 9 and the second piston 15 can be adjusted in the range of 0.1 to 10 mm / s to ensure precise control of gas pushing and mixing, and realize gas pushing, mixing and discharge.

[0067] In this embodiment, the sample introduction component is located at the bottom of the main body 1 of the device and includes multiple sample gas inlets and air inlets. Preferably, there are 5 sample gas inlets and 2 air inlets in this embodiment, namely sample gas inlet A19, sample gas inlet B20, sample gas inlet C21, sample gas inlet D22, sample gas inlet E23, air inlet A18 and air inlet B24. However, it is not limited to this and the number of sample gas inlets or air inlets can be increased or decreased according to actual needs.

[0068] In this embodiment, the air inlet is connected to an external air compressor, which can inject air into the sample preparation chamber as needed. Each sample gas inlet is connected to different types of liquid standard samples in sequence. The concentration of the liquid standard samples can be configured according to the required proportion, which can realize the precise injection of various liquid sample gases and air in proportion.

[0069] Each air inlet and sample gas inlet is equipped with a flow valve 25 and a check valve. The flow valve 25 can be used to monitor the amount of standard sample injected into the air or sample gas, and the check valve can prevent the backflow of air or sample gas.

[0070] In this embodiment, one end of the sample inlet is connected to the sample preparation chamber, and the other end is connected to the air inlet and the sample gas inlet. The sample inlet allows sample gas and air to be injected into the sample preparation chamber. Specifically, the end of the sample inlet connected to the air inlet and the sample gas inlet is also equipped with a first one-way valve 26 and a second one-way valve 27. The first one-way valve 26 and the second one-way valve 27 are respectively installed at the left and right ends of the sample inlet. The first one-way valve 26 can be set for high-concentration sample gas to pass through, and the second one-way valve 27 can be set for low-concentration sample gas to pass through, preventing gas from flowing back from the left to the right and avoiding cross-contamination. The end of the sample inlet connected to the sample preparation chamber is equipped with an inlet one-way valve 12, which is set to allow gas to enter but not exit, ensuring unidirectional airflow.

[0071] In this embodiment, the sample discharge component is located at the top of the main body 1 of the device and includes a sample outlet, a standard sample output port 6 and a waste port 5. It is used to discharge the gas in the sample chamber. The standard sample output port 6 is used for the sample gas to enter the light hydrocarbon analyzer for calibration, and the waste port 5 is used for the exhaust gas after cleaning. The two are switched by a solenoid valve. In this embodiment, an outlet one-way valve 13 is provided at the sample outlet. The outlet one-way valve 13 is set to allow gas to exit but not enter, to ensure unidirectional airflow.

[0072] In this embodiment, the entire device is controlled by a control module. The control module is electrically connected to the heating layer 3, the first drive motor, the second drive motor, the flow valve 25, the inlet check valve 12, the outlet check valve 13, the first check valve 26, the second check valve 27, the check valve, and the solenoid valve, etc., to achieve fully automated operation. The operator only needs to set the target concentration and temperature parameters through the human-machine interface, and the system can automatically complete the entire process of heating, sample injection, mixing, calibration and cleaning, which significantly reduces manual intervention and operational errors.

[0073] See Figure 2 This embodiment provides a method for dynamic configuration of continuous light hydrocarbon standards, which achieves sample preparation through a scientific dynamic sample preparation method.

[0074] First, the sample preparation chamber is heated to a predetermined temperature and kept constant by heating layer 3, providing a stable high-temperature environment for the vaporization of heavy components.

[0075] Subsequently, the first piston 9 and the second piston 15 are controlled to move in opposite directions to completely discharge the residual gas in the sample preparation chamber through the waste port 5, ensuring that the environment in the sample preparation chamber meets the requirements. The first piston 9 is then retracted to its original position, and the first chamber body 8 is opened. At this time, the second piston 15 remains stationary.

[0076] Next, one or more liquid sample gases are injected into the first chamber 8 according to a preset ratio. Since the temperature of the sample preparation chamber is higher than the boiling point of the liquid sample gas, the liquid sample gas will be completely vaporized when it enters the first chamber 8. After the liquid sample gas is vaporized, air is injected for dilution. The amount of air injected is dynamically compensated according to the real-time temperature to correct the volume deviation caused by temperature changes and ensure the accuracy of the air injection amount.

[0077] During the mixing process of sample gas and air, by controlling the reciprocating motion of the first piston 9 and the second piston 15, the gas passes through the compartment mesh 7 multiple times between the first compartment 8 and the second compartment 14, forming strong turbulence, accelerating the diffusion and mixing of gas molecules, and ensuring uniform concentration. In this embodiment, the mixing time is calculated based on the compartment volume, the initial concentration difference, and the total flow rate to ensure thorough mixing.

[0078] After mixing, the device measures the concentration of the standard sample in real time using an online detection device (such as a gas chromatograph) and compares it with the target concentration. If there is a deviation, the air injection volume is dynamically adjusted through a feedback correction formula, and the mixing operation is repeated until the concentration reaches the preset requirement.

[0079] During the calibration stage, the uniformly mixed standard gas is pushed into the standard sample output port 6 and transported to the continuous light hydrocarbon analyzer for calibration; after calibration, the device enters the cleaning process.

[0080] Position the first piston 9 and the second piston 15 in the middle of the sample preparation chamber, and simultaneously inject air through the air inlet. The first piston 9 and the second piston 15 move to the left and right respectively to fill the sample preparation chamber with air. At the same time, the first piston 9 and the second piston 15 push towards the middle to discharge the gas in the sample preparation chamber through the waste port 5, thus completing the gas cleaning of the sample preparation chamber, pipelines and other parts, ensuring that there are no residues inside the device and avoiding cross-contamination.

[0081] In this embodiment, the preset ratio is determined based on the target concentration, and the expression for the target concentration is as follows:

[0082]

[0083] In the formula: The target concentration; The concentration of the sample gas; The volume of the sample gas; For air volume;

[0084] Mixing time in the embodiments The expression is as follows:

[0085]

[0086] In the formula: K is the mixing coefficient; This refers to the volume of the sample preparation chamber; The initial concentration range; Total flow; This represents the initial maximum concentration. The initial minimum concentration;

[0087] In this embodiment, the amount of air injected into the first chamber is dynamically compensated based on the actual temperature of the sample preparation chamber, and the expression is as follows:

[0088]

[0089] In the formula: Theoretical airflow rate; The temperature compensation coefficient is set to 0.008 / ℃. Indicates the amount of air injected; To set the temperature value; This refers to the actual temperature value of the sample preparation chamber;

[0090] The feedback correction formula in the embodiment is as follows:

[0091]

[0092] In the formula: The corrected amount of air injected; The current amount of air; K f This represents the feedback coefficient, with a value ranging from 0.3 to 0.8. This refers to the concentration of the standard sample measured in real time.

[0093] This embodiment completely solves the condensation problem of heavy components at room temperature through constant temperature control, ensuring the integrity of standard sample vaporization; through multi-channel precise injection and dynamic mixing mechanism, the standard sample concentration is configured; through real-time detection and feedback correction, errors caused by environmental fluctuations and equipment status changes are further eliminated, and the concentration error is controlled within ±3%, meeting the high-precision calibration requirements of light hydrocarbon analyzers.

[0094] This device maintains the gaseous state of heavy components in a high-temperature environment and achieves precise concentration adjustment through dynamic mixing and feedback control. Specifically, the design of the constant temperature layer ensures the stability of the vaporization environment; the structure of the drive unit and the compartment mesh enhances the gas mixing effect; and the feedback correction mechanism based on real-time detection ensures the accuracy of the output concentration. Through the combination of the above technologies, this device is significantly superior to traditional sample preparation methods in terms of performance, and has strong practicality and promotional value.

[0095] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0096] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method of continuously light hydrocarbon standard dynamic configuration device, characterized in that, The device comprises a device body (1), a driving unit, a sample injection assembly and a sample discharge assembly. The device body (1) comprises a constant temperature layer and a sample preparation chamber arranged from outside to inside, and the sample preparation chamber comprises a first chamber body (8) and a second chamber body (14), wherein the first chamber body (8) and the second chamber body (14) are respectively connected with the driving unit at opposite ends. The sample injection assembly is arranged at the bottom of the device body (1) and comprises a sample preparation inlet, at least one air inlet and at least one sample gas inlet; one end of the sample preparation inlet is connected with the sample preparation chamber, and the other end is connected with the air inlet and the sample gas inlet; one end of the sample preparation inlet connected with the sample preparation chamber is provided with an inlet check valve (12). The sample discharge assembly is arranged at the top of the device body (1) and comprises a sample preparation outlet, a standard sample outlet (6) and a waste outlet (5); one end of the sample preparation outlet is connected with the sample preparation chamber, and the other end is connected with the standard sample outlet (6) and the waste outlet (5); one end of the sample preparation outlet connected with the sample preparation chamber is provided with an outlet check valve (13). The method comprises the following steps: S1. After the sample preparation chamber is heated to a predetermined temperature by the constant temperature layer, the temperature is kept constant; S2. Control the driving unit to move to empty the residual gas in the sample preparation chamber; open the sample gas inlet, inject one or more liquid sample gases into the first chamber body (8) according to a preset proportion, and gasify the liquid sample gas after it enters the first chamber body (8); S3. Open the air inlet, inject air into the first chamber body (8) according to a preset proportion, mix the air and the sample gas, control the driving unit to move back and forth according to the mixing time, transport the mixed gas in the first chamber body (8) to the second chamber body (14), and then transport the mixed gas in the second chamber body (14) to the first chamber body (8) from the second chamber body (14), so as to uniformly mix the air and the sample gas and obtain a standard gas with a predetermined concentration; S4. Transport the standard gas to a light hydrocarbon instrument through the standard sample outlet (6) by the driving unit for calibration; S5. After calibration, make the driving unit return to the original position, inject air into the sample preparation chamber through the air inlet, control the driving unit to move, and discharge the air through the waste outlet (5) to realize device cleaning; The preset proportions in S2 and S3 are determined based on the target concentration, and the expression of the target concentration is as follows: wherein: is the target concentration; is the sample gas concentration; is the sample gas volume; is the air volume; The mixing time in S3 The expression is as follows: wherein: K is a mixing coefficient; is the volume of the sample preparation chamber; is the initial concentration range; is the total flow rate; is the initial maximum concentration; is the initial minimum concentration; The amount of air injected into the first chamber body in S3 is dynamically compensated according to the actual temperature of the sample preparation chamber, and the expression is as follows: In the formula: is the theoretical air flow rate; is a temperature compensation coefficient, taken as 0.008 / °C; represents the amount of injected air; is a set temperature value; is an actual temperature value of the sample preparation bin; After S3 and before S4, feedback correction is further included, the amount of air injected is corrected in real time by comparing the real-time measured standard sample concentration with the target concentration, and then S3 is performed again; the correction formula is as follows: wherein: is the corrected amount of air injected; is the current amount of air; K f represents a feedback coefficient, and has a value ranging from 0.3 to 0.8; is the real-time measured standard sample concentration.

2. The method of claim 1, wherein the dynamic configuration of a continuous light hydrocarbon standard is characterized by, The constant temperature layer comprises a heat preservation layer (2), a heating layer (3) and a heat conduction layer (4) arranged from outside to inside.

3. The method of claim 1, wherein the apparatus is configured to dynamically configure the continuous light hydrocarbon standard. The driving unit comprises a first driving unit connected with the first chamber body (8) and a second driving unit connected with the second chamber body (14). The first driving unit comprises a first piston (9), a first motor (10) and a first screw rod (11); the first piston (9) is slidingly arranged in the first chamber body (8), one end of the first piston (9) is connected with the first screw rod (11), the first screw rod (11) is driven by the first motor (10) to drive the first piston (9) to realize reciprocating motion in the first chamber body (8); The second driving unit comprises a second piston (15), a second motor (16) and a second screw rod (17); the second piston (15) is slidingly arranged in the second chamber body (14), one end of the second piston (15) is connected with the second screw rod (17), the second screw rod (17) is driven by the second motor (16) to drive the second piston (15) to realize reciprocating motion in the second chamber body (14).

4. The method of claim 1, wherein the apparatus is configured to dynamically configure the continuous light hydrocarbon standard. The air inlet and the sample gas inlet are both provided with flow valves (25) and check valves.

5. The method of claim 1, wherein the apparatus is configured to dynamically configure the continuous light hydrocarbon standard. The end, connected with the air inlet and the sample gas inlet, of the sample preparation inlet is further provided with a first one-way valve (26) and a second one-way valve (27).

6. The method of claim 1, wherein the dynamic configuration of a continuous light hydrocarbon standard is characterized by, The sample preparation outlet is further provided with electromagnetic valves between the sample preparation outlet and the standard sample output port (6) and the waste port (5).

7. The method of claim 1, wherein the apparatus is configured to dynamically configure the continuous light hydrocarbon standard. The sample preparation chamber is centrally provided with a chamber separation net (7), the sample preparation chamber is divided into the first chamber body (8) and the second chamber body (14) with the same size by the chamber separation net (7); The chamber separation net (7) is provided with a plurality of mesh holes.

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