Normal pressure membrane separation oil and gas recovery processing system, method and related products

Abstract

The present disclosure discloses an atmospheric membrane separation oil gas recovery processing system, method and related products, the system comprises a first oil gas tank and a second oil gas tank, the system further comprises: a pretreatment component connected with the first oil gas tank, used for pretreating the oil gas to obtain a first gas; a separation component connected with the pretreatment component, used for separating the first gas to obtain a second gas and a third gas, wherein the second gas comprises gaseous petroleum, and the third gas comprises air; a recovery component connected with the separation component, used for recovering the third gas to realize the recovery of petroleum in the oil gas. Through the scheme of the present disclosure, oil gas recovery can be carried out at room temperature, which can improve the efficiency of oil gas recovery while reducing the cost of oil gas recovery.

Description

Technical Field

[0001] This disclosure generally relates to the field of petroleum technology. More specifically, this disclosure relates to an atmospheric pressure membrane separation oil and gas recovery system, method, and related products. Background Technology

[0002] Petroleum and its various products are mixtures of various hydrocarbons. During the unloading, storage, and sale of petroleum products, oil and gas evaporation and leakage are unavoidable. Evaporated and leaked oil and gas are mixtures of hydrocarbons and air, precursors to chemical pollution and ozone formation. This not only pollutes the atmosphere but also wastes resources and poses safety hazards. Recovering oil and gas can reduce air pollution and achieve the goal of environmental protection.

[0003] When the underground oil tanks at a gas station reach a certain pressure, the vapor recovery system activates to process the vapors, converting them into gasoline which flows back into the storage tanks. The treated vapors, meeting standard requirements, are then discharged through an exhaust pipe. Specifically, vapor recovery processes can include adsorption, absorption, and condensation. In adsorption, the mixed vapors enter the adsorption tank, where the vapor components are adsorbed onto the surface of an adsorbent (usually activated carbon). Air, due to its weak adsorption capacity, can be directly discharged. Once the adsorbent reaches saturation, the tank switches to desorption, releasing the previously adsorbed vapors through vacuum decompression. The vapors are then pumped into the oil tank or liquefied using other methods. However, the activated carbon in the adsorption method saturates, requiring regular replacement, resulting in high maintenance costs. Furthermore, the adsorbed activated carbon requires hazardous waste treatment, potentially causing secondary pollution. In absorption, the recovery rate is typically low, generally only around 80%, failing to meet higher recovery standards. When using the condensation method, the energy consumption of low-temperature refrigeration is high. For high-concentration oil and gas, the condensation equipment may need to be larger in scale, which results in higher manufacturing costs. In addition, when the oil and gas condensation temperature is below 0°C, frost will form, requiring regular defrosting.

[0004] In view of this, there is an urgent need to provide a solution for an atmospheric pressure membrane separation oil and gas recovery system, method and related products, so as to enable oil and gas recovery at room temperature, which can reduce the cost of oil and gas recovery while improving the efficiency of oil and gas recovery. Summary of the Invention

[0005] In order to at least address one or more of the technical problems mentioned above, this disclosure proposes a solution for an atmospheric pressure membrane separation oil and gas recovery system, method, and related products in several aspects.

[0006] In a first aspect, this disclosure provides an atmospheric pressure membrane separation oil and gas recovery and treatment system, the system comprising a first oil and gas tank and a second oil and gas tank, the system comprising: a pretreatment component connected to the first oil and gas tank for pretreating the oil and gas to obtain a first gas; a separation component connected to the pretreatment component for separating the first gas to obtain a second gas and a third gas, wherein the second gas includes gaseous petroleum and the third gas includes air; and a recovery component connected to the separation component for recovering the third gas to achieve petroleum recovery from the oil and gas.

[0007] In some embodiments, the pretreatment component includes a filtration section and a separation section; wherein the filtration section is used to filter impurities in the oil and gas to obtain a first oil and gas, wherein the first oil and gas includes gaseous gasoline, gaseous air and mist gasoline; the separation section is used to liquefy the mist gasoline to obtain a first gas and a first liquid, wherein the first gas includes gaseous gasoline and gaseous air.

[0008] In some embodiments, the separation section includes a receiving cavity in which the first liquid is located, and when the first liquid reaches a preset value, the oil and gas tank recovers the first liquid.

[0009] In some embodiments, the separation component includes one or more separation membrane assemblies.

[0010] In some embodiments, the plurality of separation membrane modules are connected in series to improve the efficiency of oil recovery.

[0011] In some embodiments, the recovery component includes a vacuum pump, one end of which is connected to the second oil and gas tank and the other end of which is connected to the separation component to provide negative pressure to the separation component for recovering the third gas.

[0012] In some embodiments, the system further includes a connecting component connected to a first oil and gas tank and a second oil and gas tank for balancing the pressure of the oil and gas tanks.

[0013] In a second aspect, this disclosure provides a method for an atmospheric pressure membrane separation oil and gas recovery and treatment system. The oil and gas tank includes a first oil and gas tank and a second oil and gas tank. The atmospheric pressure membrane separation oil and gas recovery and treatment system includes a pretreatment component connected to the first oil and gas tank, a separation component connected to the pretreatment component, and a recovery component connected to the separation component. The method includes: pretreating the oil and gas using the pretreatment component to obtain a first gas; separating the first gas using the separation component to obtain a second gas and a third gas; and recovering the third gas using the recovery component to achieve the recovery of petroleum from the oil and gas.

[0014] In a third aspect, this disclosure provides an electronic device comprising: a processor; and a memory storing program instructions for a method of an atmospheric pressure membrane separation oil and gas recovery system, wherein when the program instructions are executed by the processor, the electronic device performs the method according to the second aspect.

[0015] In a fourth aspect, this disclosure provides a computer-readable storage medium storing program instructions for a method of an atmospheric pressure membrane separation oil and gas recovery system, which, when executed by a processor, cause the method according to the second aspect to be implemented.

[0016] The atmospheric pressure membrane separation oil and gas recovery system, method, and related products provided above enable oil and gas recovery at atmospheric pressure, which can reduce the cost of oil and gas recovery while improving its efficiency. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 An exemplary block diagram of an atmospheric pressure membrane separation oil and gas recovery system according to an embodiment of this disclosure is shown;

[0019] Figure 2 A schematic diagram of the structure of the separation membrane assembly according to some embodiments of this disclosure is shown;

[0020] Figure 3a A schematic diagram of a series connection of multiple separation membrane assemblies is shown, representing some embodiments of this disclosure.

[0021] Figure 3b This diagram illustrates a structure of multiple separation membrane assemblies connected in parallel, representing some embodiments of this disclosure.

[0022] Figure 4 A schematic diagram of an atmospheric pressure membrane separation oil and gas recovery system according to some embodiments of this disclosure is shown;

[0023] Figure 5 A flowchart of a method 500 for an atmospheric pressure membrane separation oil and gas recovery system according to some embodiments of this disclosure is shown; and

[0024] Figure 6 An exemplary block diagram of an electronic device 600 for an atmospheric pressure membrane separation oil and gas recovery system according to some embodiments of this disclosure is shown. Detailed Implementation

[0025] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0028] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0029] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0030] Figure 1 An exemplary block diagram of an atmospheric pressure membrane separation oil and gas recovery system according to an embodiment of this disclosure is shown, such as Figure 1 As shown, the system includes a first oil and gas tank and a second oil and gas tank. The system further includes: a pretreatment unit 10 connected to the first oil and gas tank for pretreating the oil and gas to obtain a first gas; a separation unit 20 connected to the pretreatment unit for separating the first gas to obtain a second gas and a third gas, wherein the second gas includes gaseous petroleum and the third gas includes air; and a recovery unit 30 connected to the separation unit for recovering the second gas to achieve petroleum recovery from the mixed oil and gas.

[0031] In some embodiments, the aforementioned oil and gas tanks may include buried oil tanks, which can be installed underground. These tanks have stable fire and explosion-proof capabilities, reduce the safety distance between oil storage tanks and between them and adjacent buildings, save land resources, and lower the overall project cost. Furthermore, buried oil tanks require less distance from other buildings, making them safer and more reliable than above-ground oil tanks, and even if a fire occurs, it is easier to extinguish.

[0032] In some embodiments, the aforementioned first oil and gas tank can be a high-grade buried oil tank, and the aforementioned second oil and gas tank can be a low-grade oil and gas tank. Specifically, the aforementioned low-grade oil and gas tank is typically used to connect to a return gas channel, that is, to collect and store the oil and gas released during the refueling process. The aforementioned high-grade buried oil tank can be used to connect to a gas intake channel, and it has a gas intake function for the collection and preliminary treatment of oil and gas.

[0033] In some embodiments, the aforementioned oil and gas may include volatile organic compounds (VOCs) generated during the storage and handling of oil products in oil depots. The aforementioned VOCs may include volatile organic compounds, organic compounds that participate in atmospheric photochemical reactions, or organic compounds determined in accordance with relevant regulations.

[0034] In some embodiments, a gas station vapor recovery system may include one-stage, two-stage, and three-stage vapor recovery. One-stage vapor recovery refers to the process where, when a tanker truck unloads fuel at a gas station, the fuel inside the vehicle is transported through an unloading pipe to an underground tanker at the gas station. Simultaneously, the vapors in the underground tanker are recovered back to the tanker truck through vapor recovery pipelines, and then transported to a storage depot for centralized recycling into gasoline. Two-stage vapor recovery refers to the process where, during refueling, vapors in the fuel tank are recovered to the underground tanker via a recovery-type fuel nozzle. Three-stage vapor recovery refers to the process where, after the underground tanker at the gas station equipped with a vapor treatment device reaches a certain pressure, the treatment device is activated to process the vapors, converting them into gasoline which flows back to the storage tank. The treated vapors, meeting standard requirements, are then discharged through an exhaust pipe.

[0035] In some embodiments, the aforementioned mixed oil and gas recovery system may include an intake pipe, one end of which may be connected to a high-grade buried oil pipeline, and the other end of which may be connected to a pretreatment component, for transporting oil and gas from the high-grade buried oil pipeline to the pretreatment component. In some embodiments, a pressure sensor may also be provided on the intake pipe for detecting the pressure of the oil and gas in the intake pipe.

[0036] In some embodiments, pretreatment of oil and gas may include filtering and separating the oil and gas. Specifically, the oil and gas may include impurities, gaseous air, gaseous petroleum, and petroleum in the form of mist droplets. The impurities may include rust, powder, or dust from the pipeline. A filtration device can be used to filter out the impurities from the oil and gas. Further, a separation device can be used to separate the petroleum in the form of mist droplets from the gaseous petroleum and air. The gaseous petroleum and air can be output through the output end of the pretreatment component, while the liquid petroleum can be stored in the storage chamber of the pretreatment component. When the liquid petroleum in the storage chamber reaches a preset value, the liquid petroleum can be discharged into the high-grade buried oil pipeline through the drain pipe of the storage chamber.

[0037] Preferably, the aforementioned pretreatment component may include a high-efficiency coalescing separator, which may include a coalescing filter element and a separating filter element. The coalescing filter element is responsible for filtering out solid impurities and coalescing extremely small water droplets into larger water droplets. The separating filter element further separates water; due to its good oleophilic and hydrophobic properties, it can more effectively separate oil and water.

[0038] By setting up the aforementioned pretreatment components, it is possible to prevent mist-like oil and gas from entering the subsequent separation components, thereby improving the oil and gas recovery rate.

[0039] In some embodiments, a drain valve may be installed on the aforementioned drain pipe, and the drain valve may be equipped with a mechanical device such as a float or an inverted bucket to control the opening and closing of the valve. When the aforementioned liquid petroleum accumulates to a certain level, the float rises or the inverted bucket fills up, triggering the valve to open and discharge the liquid petroleum.

[0040] By installing the aforementioned drain valve, liquid petroleum in the system can be drained in a timely manner, thereby preventing equipment damage or dangerous situations.

[0041] In some embodiments, the aforementioned apparatus may further include a separation component 20, which may include a separation membrane assembly. The output of the pretreatment component 10 may be connected to the input of the separation component. The first gas may be input into the separation component 20. It is understood that the first gas may include gaseous petroleum and air.

[0042] In some embodiments, the aforementioned separation membrane assembly may include a first housing, which may be cylindrical in shape, and a central tube may be disposed in the middle of the first housing. It is understood that the axis of the first housing may coincide with the axis of the central tube. A first cavity may be formed between the central tube and the first housing, and the interior of the first cavity may be filled with a membrane core. It is understood that the membrane core may be a polymer material, which has excellent selectivity and sensitivity, enabling precise separation of hydrocarbon components in an oil-gas mixture. Under a certain pressure, the oil-gas mixture can pass through the polymer membrane, while air is blocked and discharged. When the oil-gas mixture passes through the polymer membrane, hydrocarbon components in the oil and gas can quickly permeate through, while air components are blocked and discharged.

[0043] In some embodiments, the aforementioned separation membrane assembly may further include an inlet end and an outlet end connected to the aforementioned first cavity. The aforementioned first gas can enter the aforementioned first cavity from the aforementioned inlet end, and within the aforementioned first cavity, the aforementioned first gas flows along the aforementioned membrane core. In this process, the petroleum in the aforementioned first gas can pass through the aforementioned membrane core and thus flow into the central tube, while the air in the aforementioned first gas cannot pass through the aforementioned membrane core and can thus be discharged by the outlet end.

[0044] In some embodiments, the output end of the aforementioned central tube can be connected to the recovery component 30. It is understood that the aforementioned recovery component 30 may include a vacuum pump, which can be connected to the aforementioned recovery component 30 to provide a negative pressure environment to the aforementioned central tube. It is understood that the aforementioned first chamber can be at atmospheric pressure, in which case the aforementioned first chamber can generate a pressure difference with the aforementioned central tube, thereby improving the efficiency of the petroleum permeation membrane core.

[0045] In some embodiments, the aforementioned membrane assembly may be arranged parallel to or perpendicular to the ground, and may also be arranged at an angle. It is understood that the arrangement of the membrane assembly can be determined based on the available space.

[0046] In some embodiments, the aforementioned vacuum pump can also transport the second gas separated in the aforementioned central tube through a return gas pipeline. Specifically, the aforementioned second gas may include gaseous petroleum. Further, the aforementioned gaseous petroleum can be transported to a low-grade buried oil tank through the return gas pipeline.

[0047] The aforementioned setup enables oil and gas recovery at room temperature, thereby improving recovery efficiency. Furthermore, the disclosed solution eliminates the need for additional materials (such as adsorbents, absorbents, or condensers), reducing space utilization and lowering costs.

[0048] In some embodiments, the pretreatment component 10 includes a filtration section and a separation section; wherein the filtration section is used to filter impurities in the oil and gas to obtain a first oil and gas, wherein the first oil and gas includes gaseous gasoline, gaseous air and misted gasoline; the separation section is used to liquefy the misted gasoline to obtain a first gas and a first liquid, wherein the first gas includes gaseous gasoline and gaseous air.

[0049] In some embodiments, the separation section includes a receiving cavity in which the first liquid is located, and when the first liquid reaches a preset value, the oil and gas tank recovers the first liquid.

[0050] In some embodiments, the aforementioned pretreatment components may include a filtration section and a separation section. Specifically, the filtration section may include a filter, oil filter, or cyclone separator, etc., which can filter and remove impurities from the aforementioned oil-gas mixture. Through the aforementioned filtration setup, a first oil-gas mixture can be obtained. It is understood that the aforementioned first oil-gas mixture may include gaseous petroleum, gaseous air, and atomized petroleum droplets. The aforementioned separation section may include a condenser or condenser, etc., which can liquefy the aforementioned atomized gasoline, thereby obtaining a first liquid. It is understood that the aforementioned first liquid may include liquid petroleum. By settling the aforementioned atomized gasoline into liquid petroleum, the aforementioned gaseous petroleum and gaseous air can be separated from the aforementioned liquid petroleum, preventing the atomized oil-gas mixture from entering the membrane module and reducing the recovery rate.

[0051] In some embodiments, a first regulating system may be provided to liquefy the aforementioned atomized gasoline and ultimately obtain a first liquid. Specifically, the aforementioned first regulating system may include a temperature regulating system and a flow rate regulating system. The temperature of the separation section can be adjusted by the temperature regulating system to accelerate the coalescence and sedimentation of the atomized gasoline. Furthermore, the flow rate of the aforementioned atomized gasoline can be adjusted to ensure that the petroleum in the aforementioned atomized gasoline has sufficient contact time. In addition, the efficiency of the aforementioned gas-liquid separation can also be increased by using special materials for the coalescing element (e.g., oleophobic and hydrophilic materials with micro-nano rough surface structures).

[0052] In some embodiments, the aforementioned pretreatment component may include a high-efficiency coalescing separator, which may include a coalescing filter element and a separating filter element. The coalescing filter element can be a filtration section, responsible for filtering out solid impurities and coalescing extremely small water droplets into larger water droplets. The separating filter element can be a separating section, which further separates water; due to its good oleophilic and hydrophobic properties, it can more effectively separate oil and water. After the aforementioned first oil and gas passes through the aforementioned high-efficiency coalescing separator, gaseous petroleum, gaseous air, and liquid petroleum can be obtained. It is understood that the aforementioned liquid petroleum can be stored in the storage chamber of the high-efficiency coalescing separator. When the liquid petroleum in the aforementioned storage chamber reaches a preset value, the aforementioned liquid petroleum can be discharged into the aforementioned high-standard buried oil pipeline through the drainage pipe of the storage chamber.

[0053] By setting up the aforementioned pretreatment components, impurities can be reduced while the aforementioned gaseous oil and gaseous air can be separated from the aforementioned liquid oil, which can prevent mist-like oil and gas from entering the membrane module and reducing the recovery rate.

[0054] Figure 2 A schematic diagram of the structure of a separation membrane assembly according to some embodiments of this disclosure is shown. In one embodiment, the separation component 20 includes one or more separation membrane assemblies.

[0055] In some embodiments, the aforementioned separation membrane assembly may include a separation body 21, which may be cylindrical. End caps 22 may be provided at both ends of the separation body 21, and the separation body 21 and the end caps 22 may form a first cavity 211. A sealing component (not shown in the figure) may be provided in the area where the end caps 22 contact the separation body 21 to prevent gas leakage from inside the separation body 21, thereby reducing the efficiency of oil and gas recovery.

[0056] In some embodiments, the aforementioned separation membrane assembly may further include a central tube 23. It is understood that the axis of the central tube 23 may coincide with or not coincide with the axis of the separation body 21. A membrane core 24 may be wound around the outside of the central tube 23. It is understood that the membrane core 24 may include a polymer material. Under normal pressure, oil and gas can permeate through the polymer material, while air cannot. In some embodiments, the aforementioned central tube 23 may be one or more. When there are multiple central tubes 23, they may be arranged in an array within the separation body 21. It is understood that one end of the central tube 23 may abut against an end cap, and the other end of the central tube 23 may serve as the central tube outlet, allowing the separated second gas to flow from the central tube outlet into the recovery component.

[0057] In some embodiments, the aforementioned separation membrane assembly may further include an inlet pipe 25 and an outlet pipe 26. The inlet pipe 25 and the outlet pipe 26 may be located near the end cap 22. It is understood that the inlet pipe 25 and the outlet pipe 26 may be near both sides of the same end cap, or they may be near two different end caps. It is understood that when the inlet pipe 25 and the outlet pipe 26 are near different end caps, the inlet pipe 25 may be near the upper end cap, and the outlet pipe 26 may be near the lower end cap; or the inlet pipe 25 may be near the lower end cap, and the outlet pipe 26 may be near the upper end cap.

[0058] The aforementioned inlet pipe 25 can be located near the lower end cap, and the aforementioned outlet pipe 26 can be located near the upper end cap. When the aforementioned first gas flows into the cavity from the aforementioned inlet pipe 25, it moves upwards along the cavity. When the first gas moves upwards and contacts the membrane core 24, the petroleum gas in the first gas can permeate the membrane core 24 and move towards the central tube 23, eventually penetrating into the central tube 23. After the petroleum gas permeates into the central tube 23, it can continue to move upwards along the central tube 23 and finally flow out through the outlet end of the central tube. It is understood that the gaseous petroleum gas flowing out from the outlet end of the central tube can be a second gas. It is understood that after the first gas moves upwards and contacts the membrane core 24, air cannot permeate the membrane core 24 and therefore cannot permeate into the central tube. The aforementioned air can continue to move upwards along the cavity and eventually flow out from the outlet pipe 26. It is understood that the gas flowing out from the aforementioned outlet pipe 26 can be a third gas.

[0059] In some embodiments, when there are multiple separation membrane groups, the multiple separation membrane groups can be connected in series or in parallel. The following will combine... Figure 3a and Figure 3b The series and parallel connections of multiple separation membrane modules are described in detail.

[0060] Figure 3a A schematic diagram of a structure consisting of multiple separation membrane assemblies connected in series, representing some embodiments of this disclosure, is shown. Figure 3a As shown, the multiple separation membrane modules are connected in series to improve the oil recovery rate.

[0061] In some embodiments, the aforementioned separation membrane assembly may include a first separation membrane assembly 261, a second separation membrane assembly 262, and a third separation membrane assembly 263. The first separation membrane assembly 261 may include a first separation inlet pipe 2611, a first separation outlet pipe 2612, and a first central pipe 2613. The second separation membrane assembly 262 may include a second separation inlet pipe 2621, a second separation outlet pipe 2622, and a second central pipe 2623. The third separation membrane assembly 263 may include a third separation inlet pipe 2631, a third separation outlet pipe 2632, and a third central pipe 2633. Specifically, the first separation outlet pipe 2612 may be connected to the second separation inlet pipe 2621, and the second separation outlet pipe 2622 may be connected to the third separation inlet pipe 2631, thereby enabling a series connection of the first separation membrane assembly 261, the second separation membrane assembly 262, and the third separation membrane assembly 263.

[0062] In some embodiments, when the first gas flows in from the first separating inlet pipe 2611, it can be separated by the first separating membrane assembly 261, and the second gas can flow out from the first central pipe 2613. Gas from the first gas that does not flow into the first central pipe 2613 can flow out from the first separating outlet pipe 2612 and into the second separating inlet pipe 2621, where it can be filtered by the second separating membrane assembly 262. The second gas flowing out from the second central pipe 2623 can also be collected into the oil tank. The gas flowing out from the second separating outlet pipe 2622 can flow back into the third separating inlet pipe 2631 and be separated by the third separating membrane assembly 263, thereby continuing to separate gaseous petroleum and gaseous air.

[0063] It is understandable that by connecting the aforementioned separation membrane modules in series, the contact area and contact time between the mixed oil and gas and the membrane core can be increased, allowing for multiple separations of gaseous oil and gaseous air in the mixed oil and gas, thereby increasing the oil recovery rate.

[0064] Figure 3b A schematic diagram of a structure in which multiple separation membrane assemblies are connected in parallel, representing some embodiments of this disclosure, is shown. Figure 3bAs shown, in some embodiments, the aforementioned multiple separation membrane groups can also be connected in parallel. Specifically, the aforementioned separation membrane groups may include a fourth separation membrane group 271, a fifth separation membrane group 272, and a sixth separation membrane group 273. The aforementioned fourth separation membrane group 271 may include a fourth separation inlet pipe 2711, a fourth separation outlet pipe 2712, and a fourth central pipe 2713. The aforementioned fifth separation membrane group 272 may include a fifth separation inlet pipe 2721, a fifth separation outlet pipe 2722, and a fifth central pipe 2723. The aforementioned sixth separation membrane group 273 may include a sixth separation inlet pipe 2731, a sixth separation outlet pipe 2732, and a sixth central pipe 2733. Specifically, the aforementioned fourth separation inlet pipe 2711 may be connected to the fifth separation inlet pipe 2721 and the sixth separation inlet pipe 2731, and the aforementioned fourth separation outlet pipe 2712 may be connected to the fifth separation outlet pipe 2722 and the sixth separation outlet pipe 2732. Understandably, the fourth central pipe 2713, the fifth central pipe 2723, and the sixth central pipe 2733 can also be connected together at this time. Through the aforementioned configuration, the fourth separation membrane group 271, the fifth separation membrane group 272, and the sixth separation membrane group 273 can be connected in parallel.

[0065] In some embodiments, after the first gas enters the separation membrane assembly, it can flow into the fourth separation inlet pipe 2711, the fifth separation inlet pipe 2721, or the sixth separation inlet pipe 2731. After being separated by the corresponding separation membrane assembly, the second gas can flow out from the corresponding fourth central pipe 2713, the fifth central pipe 2723, or the sixth central pipe 2733, respectively. The third gas can flow out from the corresponding fourth separation outlet pipe 2712, the fifth separation outlet pipe 2722, or the sixth separation outlet pipe 2732, respectively.

[0066] By designing multiple separation membrane modules in parallel, the first gas can be separated simultaneously. When the amount of the first gas is fixed, the separation time can be reduced, thereby improving the efficiency of oil and gas recovery.

[0067] It is important to understand that the above Figure 3a and Figure 3b The membrane core of the separation membrane group can be a polymer material that allows oil and gas to permeate but not air. The connection method of the separation membrane group can also be based on the aforementioned polymer material. The aforementioned separation membrane group can be the first membrane group.

[0068] In some embodiments, a second separation membrane assembly can also be used. Specifically, the second membrane element of the second separation membrane assembly can be configured as a second polymer material that allows air permeation but not oil and gas permeation. In this case, the first oil and gas flow into the input end of the second separation membrane assembly and, after separation, a second gas containing gaseous petroleum can flow out from the output end of the second separation membrane assembly and into the buried oil tank. A third gas containing gaseous air can be output from the output end of the central tube of the second separation membrane assembly, thus being discharged into the air. In this case, the aforementioned multiple second separation membrane assemblies can be connected in series or in parallel. When two second separation membrane assemblies are connected in series, the input end of one second separation membrane assembly can be connected to the pretreatment unit, its output end can be connected to the input end of another second separation membrane assembly, and the output end of the other second separation membrane assembly can be connected to the oil tank via a recovery unit. The output ends of the central tubes of the two preceding second separation membrane assemblies can be connected together and discharged into the air.

[0069] Figure 4 Schematic diagrams of atmospheric pressure membrane separation oil and gas recovery systems according to some embodiments of this disclosure are shown, such as... Figure 4 As shown, in some embodiments, the recovery component 30 includes a vacuum pump, one end of which is connected to the second oil-gas tank, and the other end of which is connected to the separation component 20, for providing negative pressure to the separation component 20 to recover the second gas. In some embodiments, the system further includes a connecting component 418, which is connected to the first oil-gas tank and the second oil-gas tank, for balancing the pressure of the oil-gas tanks.

[0070] In some embodiments, the oil tank may include a low-grade buried oil pipe 401 and a high-grade buried oil pipe 402. The pretreatment component may include a high-efficiency coalescing separator 403. One end of a high-grade air inlet pipe 404 may be located above the liquid oil in the high-grade buried oil pipe 402, and the other end of the high-grade air inlet pipe 404 may be connected to the high-efficiency coalescing separator 403. A pressure sensor 405 may be installed on the high-grade air inlet pipe 404 to detect the pressure in the high-grade buried oil pipe 402. The other end of the high-efficiency coalescing separator 403 may be connected to one end of a drain pipe 406, and the other end of the drain pipe 406 may extend below the liquid oil in the high-grade buried oil pipe 402, allowing the condensed liquid oil in the high-efficiency coalescing separator 403 to be transported to the high-grade buried oil pipe 402. A drain valve 4061 may also be installed on the drain pipe 406 to control the opening and closing of the drain pipe 406.

[0071] In some embodiments, the aforementioned separation component may include a plurality of atmospheric pressure separation membrane modules 407 connected in series. The atmospheric pressure separation membrane module 407 may include an atmospheric pressure inlet 408, an atmospheric pressure outlet 409, and an atmospheric pressure center tube outlet 410.

[0072] The outlet of the aforementioned high-efficiency coalescing separator 403 can be connected to the atmospheric pressure inlet 408, and the atmospheric pressure outlet 409 can be connected to the discharge pipe 411. Specifically, the discharge pipe 411 can be equipped with a solenoid valve 412, an exhaust pump 413, a concentration sensor 414, and a flame arrestor 415. The solenoid valve 412 controls the opening and closing of the discharge pipe 411, and the exhaust pump 413 extracts air from the discharge pipe 411, reducing the pressure and enabling the third gas to be transported from one location to another through a pressure difference. The concentration sensor 414 detects the concentration of the third gas in the discharge pipe 411, thus preventing excessive concentration. The flame arrestor 415 acts as a smoke and flame barrier, preventing smoke and flame from spreading through the pipe and thus preventing smoke or flame from flowing into the oil tank, which could potentially cause an explosion.

[0073] In some embodiments, the aforementioned atmospheric pressure central tube output end 410 can be connected to one end of a vacuum pump 416 in the recovery unit, and the other end of the aforementioned vacuum pump 416 can be connected to a low-grade buried oil pipeline via a return gas pipe 417. It is understood that the aforementioned vacuum pump 416 can provide a low-pressure environment, which can generate a pressure difference between the central tube and the core of the atmospheric pressure separation membrane module 407, thereby increasing the separation efficiency of the atmospheric pressure separation membrane module 407. Furthermore, the aforementioned vacuum pump 416 can deliver the second gas output from the atmospheric pressure central tube output end 410 to the low-grade buried oil tank via the return gas pipe 417.

[0074] In some embodiments, a connecting component 418 may be provided between the aforementioned high-grade buried oil tank and the low-grade buried oil tank to balance the pressure difference between the two.

[0075] In some embodiments, the aforementioned system may further include an explosion-proof control box 419 and a human-machine interface control console 420. The explosion-proof control box 419 may house a control and monitoring system capable of operating and monitoring equipment in the oil and gas recovery system, including leak detection, pressure control, and overheat protection, ensuring safe operation of the system under normal and abnormal conditions. The aforementioned system may also include a PLC control module and a data acquisition unit. The PLC control module may include a remote control module capable of controlling the start and stop of the vacuum pump and exhaust pump, and the switching of solenoid valves. The data acquisition unit can collect data from pressure, temperature, and concentration sensors. The aforementioned PLC module and data acquisition unit can communicate with the human-machine interface control console 420.

[0076] In some embodiments, the aforementioned human-machine interface control console 420 may be equipped with a human-machine interface, which can realize real-time data display, data storage and analysis, and statistical report generation. The console is equipped with an emergency stop button, audible and visual alarms, etc., to monitor the operation of the oil and gas recovery and treatment system in real time, realizing the unattended operation function of the oil and gas recovery and treatment device. In addition, the oil and gas recovery and treatment device is also equipped with a wireless remote module, which can realize remote control of field equipment through remote operation, and realize advanced remote maintenance functions such as remote parameter modification, fault diagnosis and partial fault repair, and program upgrade.

[0077] Figure 5 A flowchart of a method 500 for an atmospheric pressure membrane separation oil and gas recovery system according to some embodiments of this disclosure is shown, such as... Figure 5 As shown, the system includes a first oil and gas tank and a second oil and gas tank. The mixed oil and gas recovery system includes a pretreatment component connected to the first oil and gas tank, a separation component connected to the pretreatment component, and a recovery component connected to the separation component. The method includes: S510 using the pretreatment component to pretreatment the oil and gas to obtain a first gas; S520 using the separation component to separate the first gas to obtain a second gas and a third gas; S530 using the recovery component to recover the second gas to achieve the recovery of petroleum from the mixed oil and gas.

[0078] In some embodiments, pretreatment of the oil and gas to obtain a first gas may include filtration and separation of the oil and gas. The oil and gas may include impurities, gaseous air, gaseous petroleum, and petroleum in a mist-like droplet state. Filtration of the oil and gas can remove the impurities. In some embodiments, separation of the first gas may include condensing the petroleum in the mist-like droplet state, thereby converting it into liquid petroleum, achieving gas-liquid separation. In some embodiments, the pretreatment component may include a high-efficiency coalescing separator, which may include a coalescing filter element and a separation filter element. The coalescing filter element is responsible for filtering out solid impurities and coalescing tiny water droplets into larger water droplets. The separation filter element further separates water; due to its good oleophilic and hydrophobic properties, it can more effectively separate oil and water. By filtration and separation of the oil and gas, the first gas can be obtained.

[0079] In some embodiments, the aforementioned separation of the first gas to obtain the second and third gases may include using a separation membrane assembly to separate gaseous petroleum and gaseous air from the first gas. It is understood that the membrane core in the aforementioned separation membrane assembly may be a polymer material that allows gaseous petroleum to permeate but not air. After the first gas flows through the aforementioned membrane core, it can be separated into gaseous petroleum and gaseous air, thereby obtaining the second and third gases. In some embodiments, the recovery of the second and third gases may include using a vacuum pump to generate suction from the output end of the aforementioned separation membrane assembly due to a pressure difference, thereby drawing the second gas into an oil tank to achieve petroleum recovery from the mixed oil and gas.

[0080] Figure 6 An exemplary block diagram of an electronic device 600 for an atmospheric pressure membrane separation oil and gas recovery system, according to some embodiments of this disclosure, is shown. Figure 6 As shown, the electronic device 600 may include a processor 610 and a memory 620, wherein the processor 610 and the memory 620 communicate via a bus. The memory 620 stores simulated computer instructions for petroleum recovery from mixed oil and gas. When the aforementioned computer instructions are executed by the processor 610, the electronic device 600 performs the method steps described above in conjunction with the accompanying drawings: pre-treating the oil and gas using a pre-treatment component to obtain a first gas; separating the first gas using a separation component to obtain a second gas and a third gas; and recovering the second gas using a recovery component to achieve petroleum recovery from the mixed oil and gas.

[0081] Based on the foregoing description in conjunction with the accompanying drawings, those skilled in the art will understand that the embodiments of this application can also be implemented by software programs. Therefore, this application also provides a computer-readable storage medium. This computer-readable storage medium stores computer-readable instructions thereon for petroleum recovery from mixed oil and gas, which, when executed by one or more processors, implement the embodiments of this application. Figure 5 The simulation method described is for an atmospheric pressure membrane separation oil and gas recovery system.

[0082] Computer-readable storage media can be any suitable magnetic or magneto-optical storage medium, such as Resistive Random Access Memory (RRAM), Dynamic Random Access Memory (DRAM), Static Random Access Memory (SRAM), Enhanced Dynamic Random Access Memory (EDRAM), High-Bandwidth Memory (HBM), Hybrid Memory Cube (HMC), etc., or any other medium that can be used to store desired information and can be accessed by an application, module, or both. Any such computer storage medium can be part of a device or accessible to or connected to a device. Any application or module described in this invention can be implemented using computer-readable / executable instructions that can be stored or otherwise maintained by such a computer-readable medium.

[0083] It should also be understood that any module, unit, component, server, computer, terminal, or device that executes the instructions in this invention may include or otherwise access computer-readable media, such as storage media, computer storage media, or data storage devices (removable) and / or non-removable) such as disks, optical discs, or magnetic tapes. Computer storage media may include volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data.

[0084] In summary, the solution disclosed in this embodiment, which performs oil and gas recovery at atmospheric pressure, can improve the efficiency of oil and gas recovery while reducing the cost of oil and gas recovery.

[0085] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An atmospheric pressure membrane separation oil and gas recovery system, the system comprising a first oil and gas tank and a second oil and gas tank, characterized in that, The system also includes: The pretreatment unit (10) is connected to the first oil and gas tank at atmospheric pressure and is used to pretreat the oil and gas to obtain the first gas; A separation component (20) is connected to the pretreatment component for separating the first gas to obtain a second gas and a third gas, wherein the second gas includes gaseous petroleum and the third gas includes air, wherein the separation component (20) includes a plurality of separation membrane groups, wherein the separation membrane group includes a central tube and a membrane core is wound around the outside of the central tube, and the membrane core includes a polymer material; A recovery unit (30), connected to the separation unit, is used to recover the second gas in order to recover petroleum from the oil and gas. The multiple separation membrane modules are connected in series to improve the efficiency of oil recovery; The recovery component (30) includes a vacuum pump, one end of which is connected to the second oil and gas tank and the other end of which is connected to the separation component (20) to provide negative pressure to the separation component (20) for recovering the second gas.

2. The system according to claim 1, characterized in that, The pretreatment component (10) includes a filtration section and a separation section; wherein, The filter section is used to filter impurities in the oil and gas to obtain a first oil and gas mixture, wherein the first oil and gas mixture includes gaseous gasoline, gaseous air, and mist-like gasoline. The separation unit is used to liquefy the atomized gasoline to obtain a first gas and a first liquid, wherein the first gas includes gaseous gasoline and gaseous air.

3. The system according to claim 2, characterized in that, The separation section includes a receiving cavity, in which the first liquid is located. When the first liquid reaches a preset value, the oil and gas tank recovers the first liquid.

4. The system according to claim 1, characterized in that, The system also includes a connecting component (418) which is connected to the first oil and gas tank and the second oil and gas tank to balance the pressure of the oil and gas tank.

5. A method for separating oil and gas using the atmospheric pressure membrane separation oil and gas recovery treatment system according to any one of claims 1-4, wherein the system comprises a first oil and gas tank and a second oil and gas tank, characterized in that, The atmospheric pressure membrane separation oil and gas recovery system further includes a pretreatment component connected to the first oil and gas tank, a separation component connected to the pretreatment component, and a recovery component connected to the separation component. The separation component includes multiple separation membrane assemblies, each including a central tube with a membrane core wound around its outer surface. The membrane core comprises a polymer material. The method includes: Under normal pressure conditions, the oil and gas are pretreated using a pretreatment unit to obtain a first gas; Under normal pressure conditions, the first gas is separated using a separation component to obtain a second gas and a third gas; The second gas is recovered by using a recovery unit to provide negative pressure on the permeation side of the separation unit, thereby realizing the recovery of petroleum from oil and gas.

6. An electronic device, characterized in that, include: processor; And a memory storing program instructions for a method of an atmospheric pressure membrane separation oil and gas recovery system, which, when executed by the processor, cause the electronic device to perform the method according to claim 5.

7. A computer-readable storage medium, characterized in that, It stores program instructions for a method of atmospheric pressure membrane separation oil and gas recovery treatment system, which, when executed by a processor, cause the method according to claim 5 to be implemented.

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