Methods, controllers and systems for monitoring and early warning of leaks in multi-component oil and gas

Abstract

This invention provides a method, controller, and system for monitoring and early warning of leaks in multi-component oil and gas, solving the problems of rapid, highly sensitive, and localized identification of leaks during oil and gas production, transportation, storage, and use in existing technologies. The method utilizes a TDLAS oil and gas detector to detect multi-component oil and gas leaks. Based on the volume fraction of each gas detected by the TDLAS detector, the mixed explosion limits and mixed flammability limits of the multi-component oil and gas are obtained. This allows for timely early warning based on these limits, enabling accurate and rapid monitoring of hazardous chemicals and reducing their risk factor.

Description

Technical Field

[0001] This invention relates to the field of hazardous materials safety technology, specifically to a method, controller, and system for monitoring and early warning of leaks of multi-component oil and gas. Background Technology

[0002] The oil and gas volatilized during the production, transportation, and utilization of crude oil, oil products, and natural gas mainly consist of hazardous gases such as C1, C2, C3, and hydrogen sulfide. Among them, C1 is mainly methane, C2 is mainly ethane and ethylene, and C3 is mainly propane and propylene. When the volatilized oil and gas mix and accumulate, it can easily cause poisoning, fires, explosions, and other consequences, resulting in loss of life and property.

[0003] Current oil and gas leak monitoring technologies primarily rely on detectors based on catalytic combustion or electrochemical reactions. These detectors detect the concentration of the gas being measured by its diffusion or absorption into the detector, using catalytic combustion or electrochemical reactions. While this technology offers high accuracy and low equipment cost, it suffers from slow response time, short measurement distance, stringent requirements for monitoring point placement (needing to be rationally arranged according to the leak source location and gas diffusion patterns), short lifespan (3-6 months), and high maintenance costs (the detector's reaction core will fail after a period of time and needs regular replacement). With technological advancements, new oil and gas leak monitoring technologies have matured, with infrared thermal imaging, laser spectroscopy, and ultrasound being representative technologies already applicable in engineering projects. Infrared thermal imaging technology uses a thermal infrared sensitive CCD to monitor and image the leak source in the 2.0-1000μm wavelength range, qualitatively determining the leak size by observing changes in the surrounding temperature field after the leak. However, this method has poor identification accuracy in micro-leaks and struggles to achieve rapid and highly sensitive identification. Ultrasonic technology utilizes the ultrasonic waves generated by the friction between the leaking medium and the surrounding air. By using a sound intensity sensor to monitor the sound intensity in the ultrasonic frequency band of 20,000 to 100,000 Hz, the size of the leak can be qualitatively determined. This method has a fast response time and high sensitivity, but external interference must be eliminated when using it. Summary of the Invention

[0004] In view of this, the present invention provides a method, a warning controller and a warning system for monitoring and early warning of leaks in multi-component oil and gas, which solves the problem of difficulty in quickly, sensitively and locally identifying leaks in the production, transportation, storage and use of oil and gas in the prior art.

[0005] According to one aspect of the present invention, a method for monitoring and early warning of leaks in multi-component oil and gas is provided, comprising:

[0006] Step S101: Obtain the volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector.

[0007] Step S102: Calculate the mixed explosion limit of the multi-component oil and gas based on the volume fraction of each gas component and the explosion limit of each gas component.

[0008] Step S103: Calculate the mixed flammability limit of the multi-component oil and gas based on the volume fraction of the flammable gas component and the lower flammability limit of the flammable gas component; and

[0009] Step S104: When the mixed explosion limit of the multi-component oil and gas exceeds the first preset value, and / or when the mixed flammability limit of the multi-component oil and gas exceeds the second preset value, generate a warning message.

[0010] In one embodiment of the present invention, step S102 includes:

[0011] Step S1021: According to Formula (I), calculate the volume fraction of each gas component and the explosion limit of each gas component in the multi-component oil and gas to generate the mixed explosion limit of the multi-component oil and gas.

[0012] Formula (1)

[0013] In formula (1), L m This represents the explosive limit of a multi-component oil and gas mixture. EL i for i Explosion limits of the components; V i for i Volume fraction of the component.

[0014] In one embodiment of the present invention, step S103 includes:

[0015] Step S1031: Calculate the volume fraction of flammable gas in the multi-component oil and gas and the volume fraction normalization coefficient according to formula (II) to generate the volume fraction of the flammable gas component.

[0016] Formula (II)

[0017] In formula (ii), V i for i Volume fraction of flammable gas components A i For the first i The volume fraction of a flammable gas in the multi-component oil and gas mixture; B j For the first j The volume fraction of a certain inert gas in the multi-component oil and gas;k 0 represents the normalization coefficient for the volume fraction; F i For the first i Flammable gas;

[0018] Step S1032: Calculate the volume fraction of the flammable gas components and the lower flammability limit of the flammable gas according to formula (III) to generate the mixed flammability limit of the multi-component oil and gas.

[0019] Formula (3)

[0020] In formula (iii), R is the flammability limit of the multi-component oil and gas mixture, and V i i represents the volume fraction of the flammable gas component; L i The minimum flammability limit for i-flammable gas components.

[0021] In one embodiment of the present invention, before step S1021, step S102 further includes:

[0022] Step S1020: Calculate the volume fraction normalization coefficient based on the volume fraction of the flammable gas component, the volume fraction of the inert gas component, and the equivalence coefficient of the inert gas to nitrogen according to formula (iv).

[0023] Formula (IV)

[0024] In formula (iv), k 0 represents the normalization coefficient for the volume fraction; A i For the first i The volume fraction of a flammable gas in a multi-component oil and gas system; B j For the first j The volume fraction of inert gases in multi-component oil and gas; K j For the first j The equivalence coefficient of inert gases to nitrogen; F i For the first i Flammable gas; I j For the first j A type of inert gas.

[0025] In one embodiment of the present invention, step S101 includes:

[0026] Step S1011: Obtain the initial volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector.

[0027] Step S1012: Perform noise floor averaging on the initial volume fraction of each gas component in the multi-component oil and gas to generate the volume fraction of each gas component in the multi-component oil and gas; or

[0028] Step S1013: Based on the correlation function between ambient light intensity and reflectance coefficient, the initial volume fraction of each gas component in the multi-component oil and gas is processed by the noise floor averaging method to generate the volume fraction of each gas component in the multi-component oil and gas.

[0029] In one embodiment of the present invention, prior to step S101, the multi-component oil and gas leakage monitoring and early warning method further includes:

[0030] Step S100: Select a laser wavelength corresponding to each gas in the multi-component oil and gas to be tested.

[0031] In one embodiment of the present invention, after step S100 and before step S101, the multi-component oil and gas leakage monitoring and early warning method further includes:

[0032] Step S10: Modulate the laser wavelength so that the laser wavelength width and fluctuation range are both within 0.1nm.

[0033] As a second aspect of the present invention, the present invention provides a leak monitoring and early warning controller for multi-component oil and gas, comprising:

[0034] The data acquisition module is used to acquire the volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector.

[0035] The calculation module is used to calculate the mixed explosion limit of the multi-component oil and gas based on the volume fraction of each gas component and the explosion limit of each gas component; and to calculate the mixed flammability limit of the multi-component oil and gas based on the volume fraction of the flammable gas component and the lower flammability limit of the flammable gas component.

[0036] The early warning module is used to generate early warning information when the mixed explosion limit of the multi-component oil and gas exceeds a first preset value, and / or when the mixed flammability limit of the multi-component oil and gas exceeds a second preset value.

[0037] As a third aspect of the present invention, the present invention provides a multi-component oil and gas leakage monitoring and early warning system, comprising:

[0038] TDLAS oil and gas detector, wherein the TDLAS oil and gas detector includes: a TDLAS laser emitter and a TDLAS laser receiver;

[0039] The aforementioned multi-component oil and gas leak monitoring and early warning controller is communicatively connected to the TDLAS oil and gas detector; and

[0040] The display system is communicatively connected to the TDLAS oil and gas detector and the multi-component oil and gas leak monitoring and early warning controller.

[0041] In one embodiment of the present invention, the TDLAS oil and gas detector includes:

[0042] Multiple TDLAS laser emitters, each of which is used to emit multiple laser beams, each of which corresponds to a multiple gas component in the multi-component oil and gas;

[0043] A TDLAS laser receiver, wherein the TDLAS laser receiver corresponds to a plurality of TDLAS laser emitters, or the TDLAS laser receiver corresponds to a plurality of TDLAS laser emitters whose laser beams are combined into a single laser beam by a concentrator; and

[0044] Multiple filters;

[0045] In this process, by switching the filter, the TDLAS laser receiver receives multiple reflected laser beams emitted by multiple TDLAS laser emitters and reflected by multiple gas components in the multi-component oil and gas.

[0046] This invention provides a method for monitoring and early warning of leaks in multi-component oil and gas. It employs a TDLAS oil and gas detector to detect multi-component oil and gas, and analyzes the volume fraction of each gas in the multi-component oil and gas detected by the TDLAS detector to obtain the mixed explosion limit and mixed flammability limit of the multi-component oil and gas. This allows for timely early warning of leaks based on the mixed explosion limit and mixed flammability limit, thus enabling accurate and rapid monitoring of hazardous chemicals and reducing their risk factor. Attached Figure Description

[0047] The above and other objects, features, and advantages of the present invention will become more apparent from the more detailed description of the embodiments of the invention in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of the invention and form part of the specification. They are configured together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same parts or steps.

[0048] Figure 1 The diagram shown is a flowchart illustrating a method for monitoring and early warning of leaks in multi-component oil and gas according to an embodiment of the present invention.

[0049] Figure 2 The diagram shown is a flowchart illustrating a method for monitoring and early warning of leaks in multi-component oil and gas according to another embodiment of the present invention.

[0050] Figure 3 The diagram shown is a flowchart illustrating a method for monitoring and early warning of leaks in multi-component oil and gas according to another embodiment of the present invention.

[0051] Figure 4 The diagram shown is a flowchart illustrating a method for monitoring and early warning of leaks in multi-component oil and gas according to another embodiment of the present invention.

[0052] Figure 5 The diagram shown is a flowchart illustrating a method for monitoring and early warning of leaks in multi-component oil and gas according to another embodiment of the present invention.

[0053] Figure 6 The diagram shown is a schematic diagram illustrating the working principle of a multi-component oil and gas leak monitoring and early warning controller according to an embodiment of the present invention.

[0054] Figure 7 The diagram shown illustrates the working principle of a multi-component oil and gas leak monitoring and early warning system according to an embodiment of the present invention.

[0055] Figure 8 The diagram shown illustrates the working principle of a multi-component oil and gas leak monitoring and early warning system according to another embodiment of the present invention.

[0056] Figure 9 The diagram shown is a schematic diagram of the working principle of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0057] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiments of this invention are configured only to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0058] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] Figure 1 The diagram shown is a flowchart illustrating a method for monitoring and early warning of leaks in multi-component oil and gas according to an embodiment of the present invention. Figure 1 As shown, the leak monitoring and early warning method for multi-component oil and gas includes the following steps:

[0061] Step S101: Obtain the volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector.

[0062] The TDLAS (Tunable Diode Laser Spectroscopy) oil and gas detector uses TDLAS technology to detect the volume fraction of each gas in multi-component oil and gas. TDLAS technology has the advantages of high selectivity, speed, high sensitivity, long service life and low maintenance cost. It utilizes the absorption of gases by specific wavelengths of light. A narrow-band (0.1nm wide) laser with a specific wavelength is selected in the near-infrared (high-frequency infrared, high-energy) wavelength range of (3~2.5)μm to (1~0.75)μm. The laser penetrates the specific gas, and the intensity of the absorbed light is received by a filter and receiver. The volume fraction of the gas to be measured is calculated according to the Beer-Lambert law.

[0063] Step S102: Calculate the mixed explosion limit of the multi-component oil and gas based on the volume fraction of each gas component and the explosion limit of each gas component.

[0064] Specifically, step S102 may include the following steps: Step S1021: According to formula (I), calculate the volume fraction of each gas component and the explosion limit of each gas component in the multi-component oil and gas to generate the mixed explosion limit of the multi-component oil and gas.

[0065] (Formula 1)

[0066] In formula (1), L m This represents the explosive limit of a multi-component oil and gas mixture. EL i for i Explosion limits of the components; V i for i Volume fraction of the component.

[0067] Furthermore, for oil and gas mixtures of methane, ethylene, propane, and hydrogen sulfide, more accurate prediction formulas can be obtained based on explosion limit test data.

[0068]

[0069] Step S103: Calculate the mixed flammability limit of the multi-component oil and gas based on the volume fraction of the flammable gas component and the lower flammability limit of the flammable gas component.

[0070] Specifically, step S103 may include the following steps: Step S1030: Calculate the volume fraction normalization coefficient based on the volume fraction of flammable gas components, the volume fraction of inert gas components, and the equivalence coefficient of inert gas to nitrogen according to formula (iv).

[0071] (Formula 4)

[0072] In formula (iv), k 0 represents the normalization coefficient for the volume fraction; A i For the first i The volume fraction of a flammable gas in a multi-component oil and gas system; B j For the first j The volume fraction of inert gases in multi-component oil and gas; K j For the first j The equivalence coefficient of inert gases to nitrogen; F i For the first i Flammable gas; I j For the first j A type of inert gas.

[0073] Step S1031: Calculate the volume fraction of flammable gas in multi-component oil and gas and the normalization coefficient of volume fraction according to formula (II) to generate the volume fraction of flammable gas components.

[0074] (Formula 2)

[0075] In formula (ii), V i for i Volume fraction of flammable gas components A i For the first i The volume fraction of a flammable gas in a multi-component oil and gas system; B j For the first j The volume fraction of inert gases in multi-component oil and gas; k 0 represents the normalization coefficient for the volume fraction; F i For the first i Flammable gas;

[0076] Step S1032: Calculate the volume fraction of flammable gas components and the lower limit of flammability of flammable gas according to formula (III) to generate the mixed flammability limit of multi-component oil and gas.

[0077] (Formula 3)

[0078] In formula (iii), R is the flammability limit for multi-component oil and gas mixtures, and V i i represents the volume fraction of the flammable gas component; L i The minimum flammability limit for i-flammable gas components.

[0079] Step S104: When the mixed explosion limit of the multi-component oil and gas exceeds the first preset value, and / or when the mixed flammability limit of the multi-component oil and gas exceeds the second preset value, a warning message is generated. The warning message includes sound information and color information. When the warning device receives the warning message, it generates a warning message corresponding to the warning message. For example, when the warning message is color information, the warning device displays it according to the color information, such as a red warning or a yellow warning.

[0080] This invention provides a method for monitoring and early warning of leaks in multi-component oil and gas. It employs a TDLAS oil and gas detector to detect multi-component oil and gas, and analyzes the volume fraction of each gas in the multi-component oil and gas detected by the TDLAS detector to obtain the mixed explosion limit and mixed flammability limit of the multi-component oil and gas. This allows for timely early warning of leaks based on the mixed explosion limit and mixed flammability limit, thus enabling accurate and rapid monitoring of hazardous chemicals and reducing their risk factor.

[0081] In another embodiment of the present invention, Figure 2 The diagram shown is a flowchart illustrating a multi-component oil and gas leakage monitoring and early warning method according to another embodiment of the present invention. Figure 2 As shown, step S101 specifically includes the following steps:

[0082] Step S1011: Obtain the initial volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector.

[0083] Step S1012: Perform noise floor averaging on the initial volume fraction of each gas component in the multi-component oil and gas to generate the volume fraction of each gas component in the multi-component oil and gas; or

[0084] Step S1013: Based on the correlation function between ambient light intensity and reflection coefficient, the initial volume fraction of each gas component in the multi-component oil and gas is processed by the noise floor averaging method to generate the volume fraction of each gas component in the multi-component oil and gas.

[0085] The multi-component oil and gas leakage monitoring and early warning method in this embodiment of the invention, after the TDLAS oil and gas detector detects the initial volume fraction of each gas component in the multi-component oil and gas, uses noise floor averaging or the correlation function between ambient light intensity and reflectivity to perform noise floor averaging on the initial volume fraction of each gas component in the multi-component oil and gas. This can reduce the influence of internal circuit noise of the TDLAS oil and gas detector and ambient diffuse reflection on the detection results, and improve the accuracy of the TDLAS oil and gas detector in detecting the volume fraction of each gas component in the multi-component oil and gas.

[0086] In another embodiment of the present invention, Figure 3 The diagram shown is a flowchart illustrating a multi-component oil and gas leakage monitoring and early warning method according to another embodiment of the present invention. Figure 3 As shown, prior to step S101, the multi-component oil and gas leakage monitoring and early warning method further includes the following steps:

[0087] Step S100: Select the laser wavelength corresponding to each gas in the multi-component oil and gas to be tested.

[0088] In TDLAS oil and gas detectors, each gas component in multi-component oil and gas requires a specific TDLAS laser emitter. Each TDLAS laser should be selected based on the wavelength range, where the gas component being measured has an independent absorption peak and other interfering gases have no absorption peak or a very weak absorption peak in that wavelength range. For example, for methane, ethane, ethylene, propane, and hydrogen sulfide, it is recommended to select TDLAS laser emitters in the wavelength ranges of 1640~1660nm, 3330~3350nm, 1610~1640nm, 1670~1690nm, and 1570~1590nm, respectively.

[0089] Specifically, in TDLAS oil and gas detectors, the TDLAS laser receiver can be square or circular, and comes in two forms. One form involves a single TDLAS laser receiver corresponding to multiple TDLAS laser emitters. This method uses a chopper to periodically switch filters to filter different TDLAS laser beams and sequentially measure the concentration of different oil and gas components. The filter switching time should be no less than 0.5 seconds. The other form involves a single TDLAS laser receiver corresponding to a single TDLAS laser emitter. In this method, the filter does not need to be switched, and the recommended filter bandwidth is in the range of 15~40nm. The size of the TDLAS laser receiver is determined by the upper limit of the diffuse reflection laser intensity it can receive. A receiver capable of receiving and measuring 10% diffuse reflection laser intensity should ideally have a diameter of no less than 10cm.

[0090] In another embodiment of the present invention, Figure 4 The diagram shown is a flowchart illustrating a multi-component oil and gas leakage monitoring and early warning method according to another embodiment of the present invention. Figure 4 As shown, after step S100 and before step S101, the multi-component oil and gas leakage monitoring and early warning method further includes the following steps:

[0091] Step S10: Modulate the laser wavelength so that the laser wavelength width and fluctuation range are both within 0.1nm.

[0092] The wavelength width and fluctuation range of the modulated TDLAS laser must be within 0.1nm. Each TDLAS laser emitter is also equipped with a thermostat to keep the laser emitter constant at the working temperature, with a temperature control accuracy of less than ±0.1℃.

[0093] In another embodiment of the present invention, Figure 5 The diagram shown is a flowchart illustrating a multi-component oil and gas leakage monitoring and early warning method according to another embodiment of the present invention. Figure 5 As shown, after step S104, the multi-component oil and gas leakage monitoring and early warning method further includes the following steps:

[0094] Step S105: When the mixed explosion limit of the multi-component oil and gas exceeds the first preset value, and / or when the mixed flammability limit of the multi-component oil and gas exceeds the second preset value, a second detection is performed on the multi-component oil and gas. Based on the volume fraction of each gas component in the second detected multi-component oil and gas, the mixed explosion limit and mixed flammability limit of the multi-component oil and gas are recalculated. That is, when the parameters of the multi-component oil and gas exceed the limits, the retest function is activated, and data can be continuously collected and analyzed at the over-limit alarm location or retested at any time according to user needs, reducing the false alarm rate and improving the confidence level.

[0095] As a second aspect of the present invention, Figure 6 The diagram shown is a schematic diagram illustrating the working principle of a multi-component oil and gas leak monitoring and early warning controller 1 according to an embodiment of the present invention. Figure 6 As shown, the leak monitoring and early warning controller for the multi-component oil and gas includes:

[0096] Data acquisition module 11 is used to acquire the volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector;

[0097] The calculation module 12 is used to calculate the mixed explosion limit of the multi-component oil and gas based on the volume fraction of each gas component and the explosion limit of each gas component; and to calculate the mixed flammability limit of the multi-component oil and gas based on the volume fraction of the flammable gas component and the lower flammability limit of the flammable gas component.

[0098] The early warning module 13 is used to generate early warning information when the mixed explosion limit of multi-component oil and gas exceeds a first preset value, and / or when the mixed flammability limit of multi-component oil and gas exceeds a second preset value.

[0099] This invention provides a leak monitoring and early warning controller for multi-component oil and gas. It uses a TDLAS oil and gas detector to detect multi-component oil and gas, and analyzes the volume fraction of each gas in the multi-component oil and gas detected by the TDLAS oil and gas detector to obtain the mixed explosion limit and mixed flammability limit of the multi-component oil and gas. It can provide timely early warning of multi-component oil and gas based on the mixed explosion limit and mixed flammability limit, thereby accurately and quickly monitoring hazardous chemicals and reducing the risk factor of hazardous chemicals.

[0100] As a third aspect of the present invention, Figure 7 The diagram shown illustrates the working principle of a multi-component oil and gas leak monitoring and early warning system according to an embodiment of the present invention. Figure 7 As shown, the multi-component oil and gas leak monitoring and early warning system includes:

[0101] The TDLAS oil and gas detector 2 includes: a TDLAS laser emitter and a TDLAS laser receiver; the aforementioned multi-component oil and gas leak monitoring and early warning controller 1, which is communicatively connected to the TDLAS oil and gas detector 2; an early warning device 3; and a display system 4, which, along with the early warning device 3 and the TDLAS oil and gas detector 2, is communicatively connected to the multi-component oil and gas leak monitoring and early warning controller 1. The display system 4 is also communicatively connected to the TDLAS oil and gas detector 2.

[0102] The TDLAS oil and gas detector 2 detects multi-component oil and gas, obtains the volume fraction of each gas component, and sends this information to the multi-component oil and gas leak monitoring and early warning controller 1 and the display system 4. The display system 4 displays the volume fraction of each gas component in the multi-component oil and gas, allowing users to view this information. The multi-component oil and gas leak monitoring and early warning controller 1 calculates the mixed explosion limit and mixed flammability limit of the multi-component oil and gas based on the volume fraction of each gas component, and transmits these limits to the display system 4. The display system 4 displays these limits, allowing users to view them at any time. When the explosive limit of the mixture of multi-component oil and gas exceeds the first preset value, and / or when the flammability limit of the mixture of multi-component oil and gas exceeds the second preset value, the leakage monitoring and early warning controller 1 of the multi-component oil and gas generates early warning information and transmits the early warning information to the early warning device 3. When the early warning device 3 receives the early warning information transmitted by the leakage monitoring and early warning controller 1 of the multi-component oil and gas, it generates an early warning corresponding to the early warning information. For example, when the early warning information is color information, the early warning device displays it according to the color information, such as a red warning or a yellow warning, so as to accurately and quickly monitor hazardous chemicals and reduce the risk factor of hazardous chemicals.

[0103] Specifically, the TDLAS oil and gas detector includes: multiple TDLAS laser emitters, each emitting a different laser beam, corresponding to a different gas component in the multi-component oil and gas system; a TDLAS laser receiver, which corresponds to either the multiple TDLAS laser emitters or the laser beams from the multiple TDLAS laser emitters are focused into a single laser beam; and multiple filters. By switching the filters, the TDLAS laser receiver receives multiple reflected laser beams emitted by the multiple TDLAS laser emitters and reflected by the different gas components in the multi-component oil and gas system. A chopper periodically switches the filters to filter different TDLAS laser beams and sequentially measure the concentrations of different oil and gas components; the filter switching time is no less than 0.5 seconds.

[0104] In this system, the laser beams from multiple TDLAS laser receivers and emitters are combined into a single laser beam by a concentrator. This significantly reduces the weight and size of the TDLAS device, integrating multiple TDLAS laser receivers into a single TDLAS oil and gas detector. A miniature concentrator is built-in to focus four laser beams into a single mixed-wavelength laser beam. Strict examination of the laser beam wavelength corresponding to each monitored gas is necessary. The laser beam at each specific wavelength must have a significant absorption peak only for that monitored gas, while having no absorption peak or a very small absorption peak for other monitored gases. This eliminates absorption interference between gas components during multi-component oil and gas monitoring.

[0105] In another embodiment of the present invention, Figure 8 The diagram shown illustrates the working principle of a multi-component oil and gas leak monitoring and early warning system according to an embodiment of the present invention. Figure 8 As shown, the multi-component oil and gas leak monitoring and early warning system also includes: a camera device 5, which is communicatively connected to the display system 4 and the multi-component oil and gas leak monitoring and early warning controller 1. The camera device 5 is used to take pictures of the area around the pressure equipment and transmit the pictures to the display system and the multi-component oil and gas leak monitoring and early warning controller 1. The multi-component oil and gas leak monitoring and early warning controller 1 can determine the specific location of the pressure equipment based on the pictures and guide the staff to quickly locate, handle, and repair the equipment.

[0106] Below, for reference Figure 9 To describe an electronic device according to an embodiment of the present invention. Figure 9 The diagram shown is a structural schematic of an electronic device provided in an embodiment of the present invention.

[0107] like Figure 9 As shown, the electronic device 600 includes one or more processors 601 and memory 602.

[0108] The processor 601 may be a central processing unit (CPU) or other form of processing unit with data processing and / or information execution capabilities, and may control other components in the electronic device 600 to perform desired functions.

[0109] The memory 601 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program information may be stored on the computer-readable storage medium, and the processor 601 may run the program information to implement the multi-component oil and gas leak monitoring and early warning method described in the various embodiments of the present invention above, or other desired functions.

[0110] In one example, the electronic device 600 may also include an input device 603 and an output device 604, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0111] The input device 603 may include, for example, a keyboard, mouse, mobile phone, etc.

[0112] The output device 604 can output various information to the outside. The output device 604 may include, for example, a display, a communication network, and remote output devices connected thereto.

[0113] Of course, for the sake of simplicity, Figure 9 Only some of the components of the electronic device 600 relevant to the present invention are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device 600 may include any other suitable components depending on the specific application.

[0114] In addition to the methods and devices described above, embodiments of the present invention may also be computer program products, which include computer program information that, when run by a processor, causes the processor to perform the steps in the multi-component oil and gas leak monitoring and early warning method according to various embodiments of the present invention as described in this specification.

[0115] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of the present invention. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0116] Furthermore, embodiments of the present invention may also be computer-readable storage media storing computer program information thereon, which, when run by a processor, causes the processor to execute the steps in the multi-component oil and gas leakage monitoring and early warning method according to various embodiments of the present invention.

[0117] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0118] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0119] The block diagrams of devices, apparatuses, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0120] It should also be noted that in the apparatus, device, and method of the present invention, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of the present invention.

[0121] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features of the invention herein.

[0122] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-component oil and gas leak monitoring and early warning method, characterized by, The method comprises the steps of: Step S100: selecting a laser wavelength corresponding to each gas in the multi-component oil and gas according to the type of each gas in the multi-component oil and gas to be detected; Step S10: modulating the laser wavelength so that the laser wavelength width and fluctuation range are both within 0.1 nm; Step S101: obtaining the volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector; Step S102: calculating the mixed explosion limit of the multi-component oil and gas according to the volume fraction of each gas component and the explosion limit of each gas component; Step S103: calculating the mixed flammable limit value of the multi-component oil and gas according to the volume fraction of the flammable gas component in the multi-component oil and gas and the flammable lower limit value of the flammable gas component; And Step S104: when the mixed explosion limit of the multi-component oil and gas is greater than a first preset value, and / or when the mixed flammable limit value of the multi-component oil and gas is greater than a second preset value, generating a warning information; After step S104, the multi-component oil and gas leakage monitoring and warning method further comprises: Step S105: when the mixed explosion limit of the multi-component oil and gas is greater than the first preset value, and / or when the mixed flammable limit value of the multi-component oil and gas is greater than the second preset value, performing a second detection on the multi-component oil and gas, and calculating the mixed explosion limit of the multi-component oil and gas and the mixed flammable limit value of the multi-component oil and gas again according to the volume fraction of each gas component in the second detected multi-component oil and gas, so as to reduce the false alarm rate and improve the confidence; Step S103 comprises: Step S1030: calculating the volume fraction normalization coefficient according to the volume fraction of the flammable gas component of the flammable gas, the volume fraction of the inert gas component of the inert gas, and the equivalent coefficient of the inert gas to nitrogen according to formula (four); (iv) Wherein, k0 is the volume fraction normalization coefficient; Ai is the volume fraction of the i th flammable gas in the multi-component oil and gas; Bj is the volume fraction of the j th inert gas in the multi-component oil and gas; Kj is the equivalent coefficient of the j th inert gas to nitrogen; Fi is the i th flammable gas; Ij is the j th inert gas; Step S1031: calculating the volume fraction of the flammable gas component according to the volume fraction of the flammable gas in the multi-component oil and gas and the volume fraction normalization coefficient according to formula (two); (ii) Wherein, Vi is the i flammable gas component volume fraction; Step S1032: calculating the mixed flammable limit value of the multi-component oil and gas according to the volume fraction of the flammable gas component of the flammable gas and the flammable lower limit value of the flammable gas according to formula (three); (iii) Wherein, R is the mixed flammable limit value of the multi-component oil and gas, and Li is the flammable lower limit value of the i flammable gas component.

2. The method for monitoring and early warning of leakage of multi-component oil and gas according to claim 1, characterized in that, Step S102 comprises: Step S1021: calculating the mixed explosion limit of the multi-component oil and gas according to the volume fraction of each gas component in the multi-component oil and gas and the explosion limit of each gas component according to formula (one); (I) Wherein, Lm is the mixed explosion limit of the multi-component oil and gas, and ELi is the explosion limit of the i component.

3. The method for monitoring and early warning of leakage of multi-component oil and gas according to claim 1, characterized in that, Step S101 comprises: Step S1011: obtaining an initial volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector; Step S1012: performing a floor noise average value processing on the initial volume fraction of each gas component in the multi-component oil and gas to generate a volume fraction of each gas component in the multi-component oil and gas; or Step S1013: performing a floor noise average value processing on the initial volume fraction of each gas component in the multi-component oil and gas according to an associated function between the ambient light intensity and the reflection coefficient to generate a volume fraction of each gas component in the multi-component oil and gas.

4. A multi-component oil and gas leak monitoring and early warning controller characterized by, Comprising: a data acquisition module configured to acquire a volume fraction of each gas component in the multi-component oil and gas detected by the TDLAS oil and gas detector; a calculation module configured to calculate a mixed explosion limit of the multi-component oil and gas according to the volume fraction of each gas component in the multi-component oil and gas and an explosion limit of each gas component; and calculate a mixed flammable limit value of the multi-component oil and gas according to the volume fraction of the flammable gas component in the multi-component oil and gas and a flammable lower limit value of the flammable gas component; the mixed flammable limit value is calculated in the following manner: Step S1030: calculating a volume fraction normalization coefficient according to the volume fraction of the flammable gas component of the flammable gas, the volume fraction of the inert gas component of the inert gas, and an equivalent coefficient of the inert gas to nitrogen in formula (four); wherein k0 is the volume fraction normalization coefficient; Ai is a volume fraction of the i-th flammable gas in the multi-component oil and gas; Bj is a volume fraction of the j-th inert gas in the multi-component oil and gas; Kj is an equivalent coefficient of the j-th inert gas to nitrogen; Fi is the i-th flammable gas; Ij is the j-th inert gas; (Four) Step S1031: calculating the volume fraction of the flammable gas component according to the volume fraction of the flammable gas in the multi-component oil and gas and the volume fraction normalization coefficient in formula (two); wherein Vi is the i-th flammable gas component volume fraction; (ii) Step S1032: calculating the mixed flammable limit value of the multi-component oil and gas according to the volume fraction of the flammable gas component of the flammable gas and the flammable lower limit value of the flammable gas in formula (three); wherein R is the mixed flammable limit value of the multi-component oil and gas, and Li is the flammable lower limit value of the i-th flammable gas component; (iii) a pre-warning module configured to generate a pre-warning information when the mixed explosion limit of the multi-component oil and gas is greater than a first preset value, and / or when the mixed flammable limit value of the multi-component oil and gas is greater than a second preset value; The data acquisition module is further configured to: select a laser wavelength corresponding to each gas in the multi-component oil and gas to be detected according to the type of each gas; and modulate the laser wavelength so that the laser wavelength width and fluctuation range are within 0.1 nm. Comprising:

5. A multi-component oil and gas leak monitoring and warning system characterized by, a TDLAS oil and gas detector, wherein the TDLAS oil and gas detector comprises a TDLAS laser emitter and a TDLAS laser receiver; ​ The multi-component oil and gas leakage monitoring and early warning controller of claim 4, wherein the multi-component oil and gas leakage monitoring and early warning controller is communicatively connected to the TDLAS oil and gas detector; an early warning device, wherein the early warning device is communicatively connected to the multi-component oil and gas leakage monitoring and early warning controller; and a display system, wherein the display system is communicatively connected to the TDLAS oil and gas detector and the multi-component oil and gas leakage monitoring and early warning controller; the TDLAS oil and gas detector comprises: a plurality of TDLAS laser emitters, wherein each of the plurality of TDLAS laser emitters is configured to emit a plurality of emitted laser beams, and each of the plurality of emitted laser beams corresponds to a gas component of the multi-component oil and gas; a TDLAS laser receiver, wherein the TDLAS laser receiver corresponds to each of the plurality of TDLAS laser emitters or the TDLAS laser receiver corresponds to a single laser beam formed by converging the plurality of emitted laser beams from the plurality of TDLAS laser emitters via a light converging device; and a plurality of optical filters; wherein the TDLAS laser receiver receives a plurality of reflected laser beams emitted by the plurality of TDLAS laser emitters and reflected by the plurality of gas components of the multi-component oil and gas by switching the plurality of optical filters.

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