Oil and gas recovery method, system, apparatus, and storage medium

Abstract

This invention provides an oil and gas recovery method, system, equipment, and storage medium, belonging to the field of environmental protection technology. The oil and gas recovery method specifically includes: during the oil and gas extraction operation, sampling the concentration of the extracted oil and gas to obtain oil and gas concentration sampling data; based on the oil and gas concentration sampling data, determining whether the current vehicle has onboard oil and gas recovery functionality, and obtaining a determination result; based on the determination result, executing the corresponding oil and gas recovery operation, and transmitting the determination result to the gas station's online oil and gas recovery monitoring system. This invention achieves the identification and compatibility of vehicles with onboard oil and gas recovery functionality, improving the applicability and recovery efficiency of the gas station's oil and gas recovery system.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, specifically to an oil and gas recovery method, an oil and gas recovery system, an electronic device, and a readable storage medium. Background Technology

[0002] Onboard vapor recovery systems are a highly efficient technology for reducing fuel vapor pollution during refueling. By installing an activated carbon canister in the vehicle's fuel supply system, a liquid seal forms within the narrow refueling line during refueling, preventing fuel vapors from escaping from the fuel tank and refueling line. Simultaneously, any fuel vapors overflowing from the tank are transported to the activated carbon canister via a vent valve and adsorbed, thus recovering the vapors and preventing waste. The promotion and application of onboard vapor recovery systems are of great significance for reducing emissions from overall vehicle fuel systems. Data from the United States shows that onboard vapor recovery systems have a lifespan of approximately 15 years and can maintain a recovery efficiency of over 95% for extended periods. Compared to the secondary vapor recovery systems commonly used in my country, they offer advantages such as higher recovery efficiency, lower maintenance costs, and more stable and reliable performance.

[0003] With the increasing adoption of vehicles equipped with onboard vapor recovery systems in my country, existing conventional vapor recovery refueling nozzles, when used with these vehicles, still suffer from issues. Although these vehicles internally collect and process vapors during refueling, the vapor recovery system maintains a gas-liquid ratio of 1.0-1.2. However, the vapor collection hood and refueling port of the vapor recovery nozzle often have sealing gaps. This results in the existing vapor recovery system actually recovering excess air into the underground fuel tank, disrupting the existing vapor phase balance within the tank and accelerating fuel evaporation to some extent. This excess air is ultimately released through the tank's PV valve. Existing research indicates that simultaneously using an onboard vapor recovery system and a secondary vapor recovery system may reduce recovery efficiency by approximately 15%. Summary of the Invention

[0004] The purpose of this invention is to provide an oil and gas recovery method, system, device, and storage medium to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, embodiments of the present invention provide an oil and gas recovery method, which acts on an oil and gas recovery controller, the method comprising:

[0006] During the oil and gas extraction operation, the oil and gas concentration is sampled to obtain oil and gas concentration sampling data.

[0007] Based on the oil and gas concentration sampling data, it is determined whether the current vehicle has an on-board oil and gas recovery function, and the determination result is obtained.

[0008] Based on the judgment result, the corresponding oil and gas recovery operation is executed, and the judgment result is transmitted to the gas station's online monitoring system for oil and gas recovery.

[0009] Optionally, the method further includes:

[0010] Obtain fuel dispenser configuration information;

[0011] Based on the fuel dispenser configuration information, the gas phase space data of the fuel dispenser is calculated;

[0012] The initial pumping time is calculated based on the gas phase space data.

[0013] The step of sampling the extracted oil and gas concentration to obtain oil and gas concentration sampling data includes:

[0014] When the pumping time reaches the initial pumping time, the oil and gas concentration is sampled to obtain oil and gas concentration sampling data.

[0015] Optionally, the method further includes:

[0016] Once a refueling signal is detected, the fuel vapor from the car's fuel tank is extracted through the recovery pipeline.

[0017] When the pumping time reaches the initial pumping time, the oil and gas concentration is sampled to obtain oil and gas concentration sampling data, including:

[0018] When the pumping time reaches the initial pumping time, the oil and gas concentration is sampled at preset time intervals to obtain oil and gas concentration sampling data; wherein, the oil and gas concentration sampling data includes oil and gas concentration sampling data collected within multiple preset time intervals.

[0019] Optionally, the step of determining whether the current vehicle has onboard oil and gas recovery function based on the oil and gas concentration sampling data, and obtaining the determination result, includes:

[0020] The average oil and gas concentration was calculated by averaging the collected oil and gas concentration sampling data.

[0021] Determine whether the average concentration of the oil and gas is less than a first preset concentration value;

[0022] If the average concentration of oil and gas is less than the first preset concentration value, it is determined that the current vehicle has an on-board oil and gas recovery function.

[0023] Optionally, the step of determining whether the current vehicle has onboard oil and gas recovery function based on the oil and gas concentration sampling data and obtaining the determination result further includes:

[0024] Acquire historical oil and gas concentration data and historical temperature data;

[0025] Based on the historical oil and gas data and historical temperature data, establish the relationship between oil and gas concentration and temperature;

[0026] Based on the calculated average oil and gas concentration and the relationship between oil and gas concentration and temperature, it is determined whether the current vehicle has an on-board oil and gas recovery function.

[0027] Optionally, the method further includes:

[0028] Once the gun-lifting signal is detected, the oil and gas in the recovery pipeline are extracted.

[0029] Before sampling the extracted oil and gas concentration to obtain oil and gas concentration sampling data, the method further includes:

[0030] The concentration of oil and gas extracted from the self-recovery pipeline is detected to obtain the oil and gas concentration in the recovery pipeline.

[0031] Determine whether the oil and gas concentration in the recovery pipeline is greater than the second preset concentration value;

[0032] If the concentration of oil and gas in the recovery pipeline is greater than the second preset concentration value, it is determined that there is a leak between the recovery pipeline and the atmospheric environment, and corresponding repair operations are carried out for the leak.

[0033] Optionally, if the concentration of oil and gas in the recovery pipeline is less than or equal to the second preset concentration value, a refueling signal is detected. If a refueling signal is detected, oil and gas from the vehicle's fuel tank are extracted through the recovery pipeline.

[0034] Optionally, the method further includes:

[0035] When the current pumping time reaches the preset pumping time, check whether the current recovery pipeline pressure has reached the preset pressure value;

[0036] If the current pressure in the recovery pipeline does not reach the preset pressure value, it is determined that there is a leak between the recovery pipeline and the atmospheric environment, and corresponding repair operations are carried out for the leak.

[0037] Optionally, the step of performing the corresponding oil and gas recovery operation based on the judgment result includes:

[0038] If it is determined that the current vehicle has onboard oil and gas recovery function, the gas extraction operation will be stopped.

[0039] Optionally, the step of performing the corresponding oil and gas recovery operation based on the judgment result and transmitting the judgment result to the gas station's online oil and gas recovery monitoring system further includes:

[0040] If it is determined that the current vehicle does not have an on-board vapor recovery function, the vapor-liquid ratio of the vapor recovery system is adjusted to a preset range; wherein, the vapor-liquid ratio is the ratio of the volume of vapor extracted during refueling to the volume of gasoline added to the vehicle's fuel tank.

[0041] In a second aspect of the present invention, an oil and gas recovery system is provided, the system comprising an oil and gas recovery controller, an oil and gas recovery vacuum pump, and an oil and gas concentration meter; the oil and gas recovery controller is connected to the oil and gas recovery vacuum pump and the oil and gas concentration meter.

[0042] The oil and gas recovery controller is used to control the oil and gas recovery vacuum pump to draw gas from the recovery pipeline and the vehicle's fuel tank;

[0043] The oil and gas concentration meter is used to detect the concentration of the extracted oil and gas to obtain the oil and gas concentration.

[0044] The oil and gas recovery controller is also used for:

[0045] The extracted oil and gas concentration was sampled to obtain oil and gas concentration sampling data;

[0046] Based on the oil and gas concentration sampling data, it is determined whether the current vehicle has an on-board oil and gas recovery function, and the determination result is obtained.

[0047] Based on the judgment result, the corresponding oil and gas recovery operation is executed, and the judgment result is transmitted to the gas station's online monitoring system for oil and gas recovery.

[0048] Optionally, the system further includes an oil / gas flow control valve;

[0049] The vapor recovery controller is also used to stop the gas extraction operation by controlling the closure of the vapor flow control valve or the vapor recovery vacuum pump when it is determined that the current vehicle has on-board vapor recovery function.

[0050] If it is determined that the current vehicle does not have an on-board oil and gas recovery function, the gas-liquid ratio of the oil and gas recovery system is adjusted to a preset range by controlling the oil and gas flow control valve or the oil and gas recovery vacuum pump.

[0051] A third aspect of this application provides an electronic device configured to perform the above-described oil and gas recovery method.

[0052] A fourth aspect of this application provides a machine-readable storage medium storing instructions that, when executed by a processor, are configured by the processor to perform the aforementioned oil and gas recovery method.

[0053] This invention, in its embodiments, samples the concentration of extracted oil and gas during the oil and gas extraction process to obtain oil and gas concentration sampling data. Based on this data, it determines whether the current vehicle has onboard oil and gas recovery functionality, obtains a judgment result, and controls the oil and gas recovery operation of the current vehicle accordingly. In other words, this invention, by distinguishing between vehicles with and without onboard oil and gas recovery functionality, executes the refueling oil and gas recovery operation corresponding to the vehicle's functionality judgment result. This achieves the identification and compatibility of vehicles with onboard oil and gas recovery functionality, improving the applicability and recovery efficiency of the gas station oil and gas recovery system.

[0054] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0055] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0056] Figure 1 This is a schematic diagram of the architecture of the oil and gas recovery system of the present invention;

[0057] Figure 2 This is a schematic flowchart of the oil and gas recovery method of the present invention. Attached image description:

[0059] 1. Oil and gas recovery controller; 2. Oil and gas flow meter; 3. Oil and gas recovery vacuum pump;

[0060] 4. Oil and gas concentration meter; 5. Oil and gas flow control valve; 6. Pressure gauge;

[0061] 7. Breakaway valve; 8. Fuel nozzle. Detailed Implementation

[0062] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0064] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0065] Example 1

[0066] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the architecture of an oil and gas recovery system provided in an embodiment of this application.

[0067] The oil and gas recovery system includes an oil and gas recovery controller 1, an oil and gas flow meter 2, an oil and gas recovery vacuum pump 3, an oil and gas concentration meter 4, an oil and gas flow control valve 5, a pressure gauge 6, a breakaway valve 7, and a refueling nozzle 8.

[0068] Understandably, the oil and gas recovery system is connected to the gas station's online monitoring system for oil and gas recovery, so that various data during the oil and gas recovery process can be uploaded to the gas station's online monitoring system for display.

[0069] The oil and gas recovery controller 1 is connected to the oil and gas flow meter 2, the oil and gas recovery vacuum pump 3, the oil and gas concentration meter 4, the oil and gas flow control valve 5, and the pressure gauge 6 respectively. It is used to control each device and can be a PLC or a microcontroller. During operation, the oil and gas recovery controller 1 controls the oil and gas recovery vacuum pump 3 to pump air. The concentration of the pumped oil and gas is detected by the oil and gas concentration meter 4 to obtain the oil and gas concentration. The oil and gas concentration is sampled to obtain the oil and gas concentration sampling data. It is then used to determine whether the vehicle has an on-board oil and gas recovery function. Based on the vehicle function judgment result, the controller controls the oil and gas recovery vacuum pump 3 and the oil and gas flow control valve 5 to continue or stop pumping air from the car's fuel tank. In the specific implementation process, the oil and gas recovery controller 1 can also use the oil and gas flow meter 2 to obtain the flow rate data of oil and gas recovery, the oil and gas recovery controller 1 can also use the pressure gauge 6 to measure the pressure value of the recovery pipeline, the oil and gas recovery controller 1 can also control the gas-liquid ratio of the oil and gas recovery system within the preset ratio range by controlling the opening degree of the oil and gas flow control valve 5 or the rotation speed of the oil and gas recovery vacuum pump 3, and the vacuum pump can be turned on or off by controlling the power supply of the oil and gas recovery vacuum pump 3.

[0070] The oil and gas flow meter 2 can be a Roots flow meter or a vortex flow meter, used to obtain the oil and gas flow rate during the oil and gas recovery process.

[0071] The oil and gas recovery vacuum pump 3 can be a variable frequency NP pump or a power frequency durr pump, used to evacuate the recovery pipeline and the car fuel tank, or to change the flow rate by frequency conversion to change the gas-liquid ratio of the pumped gas.

[0072] The oil and gas concentration meter 4 can be a general-purpose semiconductor or infrared hydrocarbon gas concentration sensor used to detect the concentration of oil and gas in pipelines.

[0073] The oil and gas flow control valve 5 can be an electromagnetic control regulating valve used to control the gas-liquid ratio of the oil and gas recovery system in the recovery pipeline.

[0074] Pressure gauge 6 can be equipped with an explosion-proof micro-pressure sensor suitable for oil and gas pressure measurement to detect the pressure value of the recovery pipeline.

[0075] The breakaway valve 7 is a coaxial hose breakaway valve used to prevent oil leakage in case of abnormal breakage.

[0076] The fuel nozzle 8 is used to connect the car's fuel tank and the vapor recovery pipeline. When it detects that the user has pulled the fuel nozzle 8 out of the fuel dispenser, it sends a nozzle-lifting signal to the vapor recovery controller 1. When it detects that the user has started refueling, it sends a refueling start signal to the vapor recovery controller 1.

[0077] Example 2

[0078] Please refer to Figure 2 , Figure 2 This is a schematic diagram of an oil and gas recovery method provided in this embodiment.

[0079] This embodiment is based on the oil and gas recovery system provided in Embodiment 1, and this embodiment operates on the oil and gas recovery controller 1.

[0080] Step S100: During the oil and gas extraction operation, the oil and gas concentration is sampled to obtain oil and gas concentration sampling data.

[0081] In this embodiment, the oil and gas recovery vacuum pump 3 is used to extract air from the recovery pipeline, or the recovery pipeline is used to extract air from the car's fuel tank. The extracted oil and gas is then detected by the oil and gas concentration meter 4 to obtain oil and gas concentration sampling data.

[0082] It should be understood that this embodiment provides two evacuation methods. One method involves simultaneously evacuating the recovery pipeline and the vehicle's fuel tank using the vapor recovery vacuum pump 3 when a refueling start signal is detected. This means that when the vehicle is refueling, the fuel nozzle 8 generates a refueling signal. When the vapor recovery controller 1 detects the refueling start signal, and after determining that the ratio of the vapor recovery flow rate Q1 to the refueling flow rate Q0 is within the normal range of 1.0 to 1.2, and that the refueling flow rate is within the normal range of 20-50 L / min (i.e., both the refueling pump and the vapor recovery vacuum pump 3 are operating normally), the recovery pipeline and the vehicle's fuel tank are evacuated to detect the vapor concentration in these areas. The other method involves evacuating the recovery pipeline before refueling the vehicle, when the refueling pipeline is not connected to the vehicle's fuel tank. When the user picks up the fuel nozzle 8, a nozzle-lifting signal is generated. Simultaneously, when the vapor recovery controller 1 detects the nozzle-lifting signal, the recovery pipeline is evacuated to recover any residual vapor in the pipeline.

[0083] It is worth mentioning that, since residual fuel gas from previous refueling and fuel gas recovery may remain in the recovery pipeline, this embodiment proposes a delay in sampling the extracted fuel gas concentration to avoid misjudging the fuel gas concentration in the vehicle's fuel tank. Specifically: The fuel dispenser configuration information is obtained; based on this information, the fuel dispenser's vapor space data is calculated; then, based on the vapor space data, the initial pumping time is calculated; when the current pumping time reaches the initial pumping time, the extracted fuel gas concentration is sampled to obtain fuel gas concentration sampling data. Specifically, the calculation of the fuel dispenser's vapor space data involves calculating the sum of the vapor space inside the fuel nozzle 8, the vapor space inside the fuel gas recovery coaxial hose, and the vapor spaces of the disconnect valve 7, the gas-liquid separator, and the fuel dispenser's internal pipelines, based on the actual configuration of the fuel dispenser. This sum is denoted as V1. The initial pumping time is calculated as follows:

[0084] T1 = V1 / Q + τ;

[0085] In the formula, T1 is the initial pumping time, V1 is the gas phase space data of the fuel dispenser, and Q is the pumping flow rate of the oil and gas recovery vacuum pump 3; where Q can be obtained by measuring the current flow rate of the oil and gas recovery vacuum pump 3 by the oil and gas flow meter 2, or by obtaining the average value of the historical flow rate data of the oil and gas recovery vacuum pump 3.

[0086] Based on the two evacuation methods mentioned above, this embodiment provides two corresponding oil and gas concentration sampling methods. Specifically: For the method where evacuation is performed simultaneously on the recovery pipeline and the vehicle's fuel tank when a refueling start signal is detected, the evacuated oil and gas concentration is sampled at preset time intervals when the current evacuation time reaches the initial evacuation time, thus obtaining oil and gas concentration sampling data. This means that oil and gas concentration is sampled at equal time intervals during the refueling process, and the obtained oil and gas concentration sampling data reflects the changes in oil and gas concentration during refueling. For the method where evacuation is performed simultaneously on the recovery pipeline when a nozzle lift signal is detected, the concentration of the evacuated gas needs to be detected to obtain the oil and gas concentration in the recovery pipeline. Further determination is made as to whether the oil and gas concentration in the recovery pipeline is greater than a second preset concentration value. If so, it is determined that there is a leak between the recovery pipeline and the refueling pipeline, which could be an internal leak in the oil and gas lines inside the refueling nozzle 8, or an internal leak in the oil and gas lines at the disconnect valve 7, etc., and corresponding repairs are made to address the leak. If not, it is detected whether there is a refueling signal. If a refueling signal is detected, evacuation is performed simultaneously on the recovery pipeline and the vehicle's fuel tank.

[0087] The above method analyzes the oil and gas concentration to determine whether there is a leak between the recovery pipeline and the refueling pipeline. In addition, since the oil and gas recovery system is in a sealed environment, this embodiment also provides a method to further determine whether there is a leak between the recovery pipeline and the atmospheric environment by analyzing the pressure value of the recovery pipeline. Specifically: when the current evacuation time exceeds the preset evacuation time, it is detected whether the current pressure of the recovery pipeline has reached the preset pressure value. If the current pressure of the recovery pipeline has reached the preset pressure value, it is detected whether there is a refueling signal. If a refueling signal is detected, the recovery pipeline and the vehicle's fuel tank are evacuated simultaneously. If the current pressure of the recovery pipeline has not reached the preset pressure value, it is determined that there is a leak between the recovery pipeline and the atmospheric environment, and the leak is repaired accordingly.

[0088] Step S200: Based on the oil and gas concentration sampling data, determine whether the current vehicle has an on-board oil and gas recovery function, and obtain the judgment result.

[0089] Step S300: Based on the judgment result, perform the corresponding oil and gas recovery operation and transmit the judgment result to the gas station's online oil and gas recovery monitoring system.

[0090] It is important to understand that when refueling and performing vapor recovery on vehicles equipped with On-Road Vapor Regeneration (ORVR), since the vapors in the fuel tank have already been recovered by the vehicle's ORVR system, the secondary vapor recovery system will pump air from the fuel tank again. This pumped-back air contains a large amount of air, which can easily disrupt the evaporation balance of the underground fuel tank, posing a safety hazard. Therefore, this embodiment proposes a method to determine whether the current vehicle has ORVR functionality. If the vehicle does have ORVR, the vapor flow control valve 5 or the vapor recovery vacuum pump 3 is closed to stop pumping air from the current vehicle, improving vapor recovery efficiency and saving energy. If the vehicle does not have ORVR, vapor recovery continues.

[0091] Based on the oil and gas concentration sampling data obtained in step S100, this embodiment provides two methods to determine whether the current vehicle has an on-board oil and gas recovery function. One method is to calculate the average oil and gas concentration by averaging the above oil and gas concentration sampling data, and then determine whether the average oil and gas concentration is greater than a first preset concentration value. If it is, the current vehicle does not have an on-board oil and gas recovery function; otherwise, the current vehicle has an on-board oil and gas recovery function. Since the oil and gas concentration inside the car's fuel tank is usually a saturation concentration, which is directly related to the ambient temperature, this embodiment also proposes to further establish a relationship function between oil and gas concentration and temperature by obtaining historical oil and gas concentration and historical temperature data, denoted as C. m =f(T),C m Let C be the fuel vapor concentration, T be the temperature, and the relationship function be C to determine whether the average fuel vapor concentration of the current vehicle is greater than a preset multiple. m = f(T)*k, where the preset multiple k is a configurable coefficient. If the average oil and gas concentration is greater than the preset multiple relationship function, it is determined that the current vehicle does not have on-board oil and gas recovery function, and air extraction continues. If the average oil and gas concentration is less than or equal to the preset multiple relationship function, it is determined that the current vehicle has on-board oil and gas recovery function, and oil and gas recovery stops. The relationship function between temperature and concentration can be... P is the saturated vapor pressure of gasoline. The first preset concentration can be set to the gasoline vapor concentration C. m 50%.

[0092] Understandably, when it is determined that the current vehicle does not have an on-board vapor recovery function, while continuing to extract vapor from the current vehicle, it is also necessary to control the vapor-liquid ratio of the vapor recovery system within a preset range. The vapor-liquid ratio is the ratio of the volume of vapor extracted during refueling to the volume of gasoline added to the car's fuel tank, and the preset range is 1.00-1.20.

[0093] This embodiment presents examples of oil and gas recovery methods under different installation conditions, as shown below:

[0094] Example 1: Due to operating limitations, pressure gauge 6 could not be installed. When the fuel nozzle 8 starts refueling the current vehicle, the vapor recovery controller 1 detects the refueling signal and simultaneously activates the vapor recovery vacuum pump 3 to evacuate the recovery pipeline and / or the vehicle's fuel tank. The refueling flow rate and fuel flow rate Q are obtained through the fuel dispenser's main board and the vapor flow meter 2, respectively. To avoid residual fuel from previous refueling and vapor recovery processes in the refueling pipeline, Example 1 can calculate the vapor phase space data of the fuel dispenser based on the actual pipeline configuration. Based on the vapor phase space data, the initial evacuation time is calculated as T1 = V1 / Q + τ, where V1 is the evacuation flow rate of the vapor recovery vacuum pump 3, which can be obtained by measuring the current flow rate of the vapor recovery vacuum pump 3 using the vapor flow meter 2. When the initial extraction time is reached, the concentration of extracted oil and gas is sampled at preset time intervals to obtain oil and gas concentration sampling data collected within multiple preset time intervals. After processing the oil and gas concentration sampling data using a certain mathematical statistical method, the average oil and gas concentration is calculated. It is then determined whether the average oil and gas concentration is greater than a preset threshold. If so, it is considered that the car's fuel tank contains a high concentration of oil and gas, and the current vehicle is determined to be a vehicle without on-board oil and gas recovery function. The extraction of air from the vehicle continues, and the gas-liquid ratio of the oil and gas recovery system is controlled within the range of 1.0-1.2. If not, it is considered that the concentration of oil and gas in the car's fuel tank is low, and the current vehicle is determined to be a vehicle with on-board oil and gas recovery function. The oil and gas recovery of the vehicle is then stopped. Example 1 can also establish a relationship function between oil and gas concentration and temperature based on historical oil and gas concentration data and historical temperature data from previous refueling and recovery processes at gas stations. It can then determine whether the average oil and gas concentration is greater than a preset multiple of the relationship function. If so, the current vehicle is determined to be a vehicle without on-board oil and gas recovery function, and the vehicle will continue to be pumped out, with the gas-liquid ratio controlled within the range of 1.0-1.2. If not, the current vehicle is determined to be a vehicle with on-board oil and gas recovery function, and oil and gas recovery for the vehicle will be stopped.

[0095] Example 2: Due to operating limitations, pressure gauge 6 and oil / gas flow control valve 5 are not installed. At this time, the oil / gas recovery vacuum pump 3 is uncontrolled. When the recovery control module detects the nozzle-lifting signal, it pre-starts the oil / gas recovery vacuum pump 3 to evacuate the recovery pipeline. The gas path is closed at this time to recover residual oil / gas in the recovery pipeline. Example 2 can calculate the gas phase space data of the fuel dispenser based on its actual pipeline configuration. Based on the gas phase space data, the initial evacuation time is calculated: T1 = V1 / Q + τ, where Q is the evacuation velocity of the oil / gas recovery vacuum pump 3, obtained by averaging the historical flow velocity data of the oil / gas recovery vacuum pump 3. When the current evacuation time reaches the initial evacuation time, the concentration of the recovered oil / gas in the recovery pipeline is sampled. If the concentration of the recovered oil / gas in the recovery pipeline is greater than a pre-set concentration value, then the relationship between the recovery pipeline and the refueling pipeline is determined. If a leak is detected, the system checks for a refueling signal. If a refueling signal is detected, the system simultaneously evacuates the recovery pipeline and the vehicle's fuel tank. After a preset time has elapsed, the concentration of the extracted fuel vapor is sampled at preset time intervals to obtain fuel vapor concentration sampling data collected within multiple preset time intervals. The fuel vapor concentration sampling data is then processed using a certain mathematical statistical method to calculate the average fuel vapor concentration. If the average fuel vapor concentration exceeds a preset threshold, the vehicle is considered to have a high concentration of fuel vapor in the fuel tank and is determined to be a vehicle without on-board fuel vapor recovery function. The system continues to evacuate the vehicle and controls the gas-liquid ratio of the fuel vapor recovery system within the range of 1.0-1.2. If not, the fuel vapor concentration in the fuel tank is considered to be low and the vehicle is determined to be a vehicle with on-board fuel vapor recovery function. The fuel vapor recovery process is then stopped for this vehicle. Example 2 can also establish a relationship function between oil and gas concentration and temperature based on historical oil and gas concentration data and historical temperature data from previous refueling and recovery processes at gas stations. It can then determine whether the average oil and gas concentration is greater than a preset multiple of the relationship function. If so, the current vehicle is determined to be a vehicle without on-board oil and gas recovery function, and the vehicle will continue to be pumped out, with the gas-liquid ratio controlled within the range of 1.0-1.2. If not, the current vehicle is determined to be a vehicle with on-board oil and gas recovery function, and oil and gas recovery for the vehicle will be stopped.

[0096] Example 3: Due to operating conditions, oil and gas flow meter 2 was not installed. When the recovery control module detects the gun lifting signal, it pre-starts the oil and gas recovery vacuum pump 3 to evacuate the recovery pipeline. At this time, the gas path is in a closed state. The purpose is to recover the residual oil and gas in the recovery pipeline. To detect whether there is a leak in the recovery pipeline, Example 3 can detect whether the current recovery pipeline pressure has reached the preset pressure value when the current evacuation time exceeds the preset evacuation time. If the current recovery pipeline pressure reaches the preset pressure value, it can detect whether there is a refueling signal. If a refueling signal is detected, it will proceed as planned. The system first evacuates the recovery pipeline and the vehicle's fuel tank. If the current pressure in the recovery pipeline does not reach the preset pressure value, it is determined that there is a leak in the recovery pipeline or a malfunction in the oil and gas recovery vacuum pump 3, and the corresponding repair is carried out. If not, the oil and gas concentration in the recovery pipeline is further sampled to determine whether the oil and gas concentration in the recovery pipeline is greater than a preset concentration value. If so, it is determined that there is a leak between the recovery pipeline and the refueling pipeline. If not, it detects whether there is a refueling signal. If a refueling signal is detected, the system simultaneously evacuates the recovery pipeline and the vehicle's fuel tank. After confirming that there is no leakage between the recovery pipeline and the refueling pipeline, Example 3, after the current evacuation time reaches a preset time, samples the concentration of the extracted oil and gas at preset time intervals to obtain oil and gas concentration sampling data collected within multiple preset time intervals. After processing the oil and gas concentration sampling data using a certain mathematical statistical method, the average oil and gas concentration is calculated. It is then determined whether the average oil and gas concentration is greater than a preset threshold. If so, it is considered that the car's fuel tank contains a high concentration of oil and gas, and the current vehicle is determined to be a vehicle without on-board oil and gas recovery function. Evacuation of the vehicle continues, and the gas-liquid ratio of the oil and gas recovery system is controlled within the range of 1.0-1.2. If not, it is considered that the oil and gas concentration in the car's fuel tank is low, and the current vehicle is determined to be a vehicle with on-board oil and gas recovery function. Oil and gas recovery for the vehicle is then stopped. Example 3 can also establish a relationship function between oil and gas concentration and temperature based on historical oil and gas concentration data and historical temperature data from previous refueling and recovery processes at gas stations. It can then determine whether the average oil and gas concentration is greater than a preset multiple of the relationship function. If so, the current vehicle is determined to be a vehicle without on-board oil and gas recovery function, and the vehicle will continue to be pumped out, with the gas-liquid ratio controlled within the range of 1.0-1.2. If not, the current vehicle is determined to be a vehicle with on-board oil and gas recovery function, and oil and gas recovery for the vehicle will be stopped.

[0097] This embodiment samples the concentration of extracted oil and gas during the extraction process to obtain oil and gas concentration data. Based on this data, it determines whether the vehicle has onboard vapor recovery functionality, obtains the judgment result, and reports the result to the gas station's online vapor recovery monitoring system. Based on this judgment result, it controls the vapor recovery operation of the vehicle. In other words, this embodiment distinguishes between vehicles with and without onboard vapor recovery functionality, executing the vapor recovery operation corresponding to the vehicle's functionality judgment result. This achieves identification and compatibility with vehicles possessing onboard vapor recovery functionality, avoids excessive emissions caused by drawing large amounts of air into underground oil tanks, improves the applicability and overall recovery efficiency of vapor recovery, and saves energy.

[0098] Example 3

[0099] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0100] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0101] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0102] Example 4

[0103] This invention also provides a computer-readable storage medium storing instructions that, when executed by a processor, are adapted to perform a program containing steps of an oil and gas recovery method.

[0104] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0106] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0107] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0108] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0109] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0110] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0111] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for oil and gas recovery, characterized in that, The method, applied to an oil and gas recovery controller, includes: During oil and gas extraction operations, the extracted oil and gas concentration is sampled to obtain oil and gas concentration sampling data, including: When the pumping time reaches the initial pumping time, the oil and gas concentration of the pumped oil and gas is sampled at preset time intervals to obtain oil and gas concentration sampling data; wherein, the oil and gas concentration sampling data includes oil and gas concentration sampling data collected within multiple preset time intervals. The initial pumping time is determined in the following way: Obtain fuel dispenser configuration information; Based on the fuel dispenser configuration information, the gas phase space data of the fuel dispenser is calculated; The initial pumping time is calculated based on the gas phase space data. Based on the oil and gas concentration sampling data, it is determined whether the current vehicle has an on-board oil and gas recovery function, and the determination result is obtained, including: The average oil and gas concentration was calculated by averaging the collected oil and gas concentration sampling data. Determine whether the average concentration of the oil and gas is less than a first preset concentration value; If the average concentration of oil and gas is less than the first preset concentration value, it is determined that the current vehicle has an on-board oil and gas recovery function. Based on the judgment result, the corresponding oil and gas recovery operation is executed, and the judgment result is transmitted to the gas station's online monitoring system for oil and gas recovery.

2. The oil and gas recovery method according to claim 1, characterized in that, The method further includes: Once a refueling signal is detected, fuel vapors are extracted from the vehicle's fuel tank via the recovery pipeline.

3. The oil and gas recovery method according to claim 1, characterized in that, The step of determining whether the current vehicle has an on-board oil and gas recovery function based on the oil and gas concentration sampling data, and obtaining the determination result, also includes: Acquire historical oil and gas concentration data and historical temperature data; Based on the historical oil and gas concentration data and historical temperature data, establish the relationship between oil and gas concentration and temperature. Based on the calculated average oil and gas concentration and the relationship between oil and gas concentration and temperature, it is determined whether the current vehicle has an on-board oil and gas recovery function.

4. The oil and gas recovery method according to claim 3, characterized in that, The method further includes: Once the gun-lifting signal is detected, extract the oil and gas from the recovery pipeline; Before sampling the extracted oil and gas concentration to obtain oil and gas concentration sampling data, the method further includes: The concentration of oil and gas extracted from the recovery pipeline is detected to obtain the concentration of oil and gas in the recovery pipeline. Determine whether the oil and gas concentration in the recovery pipeline is greater than the second preset concentration value; If the concentration of oil and gas in the recovery pipeline is greater than the second preset concentration value, it is determined that there is a leak between the recovery pipeline and the atmospheric environment, and corresponding repair operations are carried out for the leak.

5. The oil and gas recovery method according to claim 4, characterized in that, If the concentration of oil and gas in the recovery pipeline is less than or equal to the second preset concentration value, then a refueling signal is detected. If a refueling signal is detected, oil and gas from the vehicle's fuel tank are extracted through the recovery pipeline.

6. The oil and gas recovery method according to claim 5, characterized in that, The method further includes: When the current pumping time reaches the preset pumping time, check whether the current recovery pipeline pressure has reached the preset pressure value; If the current pressure in the recovery pipeline does not reach the preset pressure value, it is determined that there is a leak between the recovery pipeline and the atmospheric environment, and corresponding repair operations are carried out for the leak.

7. The oil and gas recovery method according to claim 6, characterized in that, The step of performing the corresponding oil and gas recovery operation based on the judgment result includes: If it is determined that the current vehicle has onboard oil and gas recovery function, the gas extraction operation will be stopped.

8. The oil and gas recovery method according to claim 7, characterized in that, The step of performing the corresponding oil and gas recovery operation based on the judgment result and transmitting the judgment result to the gas station's online oil and gas recovery monitoring system also includes: If it is determined that the current vehicle does not have an on-board vapor recovery function, the vapor-liquid ratio of the vapor recovery system is adjusted to a preset range; wherein, the vapor-liquid ratio is the ratio of the volume of vapor extracted during refueling to the volume of gasoline added to the vehicle's fuel tank.

9. An oil and gas recovery system, characterized in that, The system includes an oil and gas recovery controller, an oil and gas recovery vacuum pump, and an oil and gas concentration meter; the oil and gas recovery controller is connected to the oil and gas recovery vacuum pump and the oil and gas concentration meter. The oil and gas recovery controller is used to control the oil and gas recovery vacuum pump to draw gas from the recovery pipeline and the vehicle's fuel tank; The oil and gas concentration meter is used to detect the concentration of the extracted oil and gas to obtain the oil and gas concentration. The oil and gas recovery controller is also used for: The extracted oil and gas concentration was sampled to obtain oil and gas concentration sampling data, including: When the pumping time reaches the initial pumping time, the oil and gas concentration of the pumped oil and gas is sampled at preset time intervals to obtain oil and gas concentration sampling data; wherein, the oil and gas concentration sampling data includes oil and gas concentration sampling data collected within multiple preset time intervals. The initial pumping time is determined in the following way: Obtain fuel dispenser configuration information; Based on the fuel dispenser configuration information, the gas phase space data of the fuel dispenser is calculated; The initial pumping time is calculated based on the gas phase space data. Based on the oil and gas concentration sampling data, it is determined whether the current vehicle has an on-board oil and gas recovery function, and the determination result is obtained, including: The average oil and gas concentration was calculated by averaging the collected oil and gas concentration sampling data. Determine whether the average concentration of the oil and gas is less than a first preset concentration value; If the average concentration of oil and gas is less than the first preset concentration value, it is determined that the current vehicle has an on-board oil and gas recovery function. Based on the judgment result, the corresponding oil and gas recovery operation is executed, and the judgment result is transmitted to the gas station's online monitoring system for oil and gas recovery.

10. The oil and gas recovery system according to claim 9, characterized in that, The system also includes an oil and gas flow control valve; The vapor recovery controller is also used to stop the gas extraction operation by controlling the closure of the vapor flow control valve or the vapor recovery vacuum pump when it is determined that the current vehicle has on-board vapor recovery function. If it is determined that the current vehicle does not have an on-board oil and gas recovery function, the gas-liquid ratio of the oil and gas recovery system is adjusted to a preset range by controlling the oil and gas flow control valve or the oil and gas recovery vacuum pump.

11. An electronic device, characterized in that, include: A processor and a memory, the memory storing machine-readable instructions executable by the processor, which, when executed by the processor, perform the oil and gas recovery method according to any one of claims 1-8.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions for causing a machine to perform the oil and gas recovery method according to any one of claims 1-8.

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