Method and device for treating polymer-type solid aged oil

Abstract

The present disclosure relates to a polymer type solid aged oil treatment method and device, the device comprising: a treatment box for providing a sealed treatment environment; a feeding opening and a dosing opening are arranged on the treatment box, the feeding opening is used for feeding the polymer type solid aged oil to be treated; a heating element is arranged in the treatment box, and the heating element is used for heating to keep the treatment environment at a preset treatment temperature. The dosing device is connected with the dosing opening, and is used for adding a polymerization inhibitor into the treatment box. At the preset treatment temperature, the polymerization inhibitor is used for breaking the polymerization of the solid aged oil, and liquid crude oil meeting the recycling standard is obtained. The above scheme can not only avoid the loss of crude oil, but also improve the treatment efficiency of the aged oil and greatly reduce the treatment cost. At the same time, the added polymerization inhibitor can be used as an additive to maintain the properties of the crude oil and be recycled, thereby effectively improving the quality of the treated crude oil.

Description

Technical Field

[0001] This disclosure relates to the field of crude oil processing technology, and in particular to a method and apparatus for processing polymer-type solid aged oil. Background Technology

[0002] During the extraction, processing, or transportation of oil, a large amount of aged oil is generated due to at least one physical, chemical, or biological action. Aged oil is a mixture of oils, and due to its complex composition and high stability, it is difficult to process.

[0003] In realizing the present invention, the inventors discovered at least the following technical problems in the related technology: In gathering and transportation stations, energy-saving methods are typically used to store aged oil, such as storing it at room temperature. This aged oil is generally at the end of oilfield production, and impurities have already been removed in the front-end processing. Therefore, the aged oil in the gathering and transportation station mainly contains grease, polymers, and water, and is essentially free of impurities. After being stored at room temperature, the aged oil gradually solidifies (below a certain temperature point (e.g., 50℃, 80℃, etc.) it will either solidify or have a solid phase precipitate). Currently, the common methods for treating this aged oil are to filter out some of the solid phase or entrust the treatment to a third-party processing unit. Filtering out the solid phase leads to a waste of crude oil; entrusting a third-party processing unit incurs additional transportation, processing time, and economic costs. Currently, most treatment solutions for aged oil are for oil-water emulsion aged oil in non-closed environments, using demulsifiers, which are suitable for emulsion-type aged oil but not for polymer-type solid aged oil; this also causes some environmental pollution. Therefore, there is an urgent need to propose a solution that can efficiently, cost-effectively, and environmentally friendly treat polymer-based solid aging oils. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the embodiments of this disclosure provide a method and apparatus for treating polymer-type solid aging oil.

[0005] In a first aspect, embodiments of this disclosure provide a treatment apparatus for polymeric solid aged oil. The apparatus includes a treatment tank and a dosing device. The treatment tank provides a sealed treatment environment; the treatment tank is provided with a feed port and a dosing port, the feed port being used to dispense the polymeric solid aged oil to be treated; a heating element is provided inside the treatment tank to heat the environment and maintain a preset treatment temperature. The dosing device is connected to the dosing port and is used to add a polymerization inhibitor into the treatment tank. At the preset treatment temperature, the solid aged oil is subjected to polymerization-breaking treatment based on the polymerization inhibitor to obtain liquid crude oil that meets recycling standards.

[0006] In some embodiments, the polymerization inhibitor is obtained from the target component through a polymerization reaction; the target component includes: acrylamide, acrylic acid, styrene, ethylene oxide, and propylene oxide. The mass parts corresponding to the target component are: 50-70 parts acrylamide, 40-45 parts acrylic acid, 10-20 parts styrene, 10-15 parts ethylene oxide, and 10-15 parts propylene oxide.

[0007] In some embodiments, the mass ratio of the above-mentioned polymerization inhibitor to the above-mentioned solid aging oil is 1:500 to 1:1000.

[0008] In some embodiments, the apparatus further includes a stirring mechanism. The stirring mechanism is assembled with the processing tank and is used to stir the solid aged oil in the processing environment, or to stir the aged oil and polymerization inhibitor in the processing environment.

[0009] In some embodiments, the stirring mechanism includes a stirring paddle and a stirring drive. The stirring paddle, located within the processing chamber, includes a stirring shaft and multiple blades, the blades being spirally distributed around the outer periphery of the stirring shaft; wherein the multiple blades have multiple different inclination angles to generate tangential forces at different angles; at least a portion of the blades are radially inclined downwards from the inside out. The stirring drive is connected to the stirring shaft, located outside the processing chamber, and drives the stirring paddle for controllable stirring.

[0010] In some embodiments, the apparatus further includes an oil pipeline. The oil pipeline is connected to the processing outlet of the processing tank and is used to transport liquid crude oil that meets recycling standards to a target downstream location. The oil pipeline is equipped with an oil pump, a first valve and a second valve for controlling the on / off state of the oil pipeline, the first valve being located at the inlet of the oil pump and the second valve being located at the outlet of the oil pump.

[0011] In some embodiments, the heating element includes: a heating coil laid inside the chamber for heating the material added to the processing environment to reach the required processing temperature; the heat of the heating coil comes from a circulating heat source of the gathering and transmission station, including at least one of the following: steam heat energy, hot water heat energy, electric resistance heating energy, and fuel heat energy; wherein, the interior of the processing chamber is provided with a corrosion-resistant coating, and the exterior of the processing chamber has a heat insulation layer.

[0012] Secondly, embodiments of this disclosure provide a method for processing polymeric solid aging oil. The method includes: placing the polymeric solid aging oil to be processed into a sealed processing environment, maintaining a preset processing temperature, gradually converting the solid aging oil into a liquid state at the preset processing temperature, adding a polymerization inhibitor during the conversion, and performing a polymerization-depolymerization treatment on the solid aging oil based on the polymerization inhibitor to obtain liquid crude oil that meets recycling standards.

[0013] In some embodiments, the polymerization inhibitor is obtained from the target components through a polymerization reaction; the target components include: acrylamide, acrylic acid, styrene, ethylene oxide, and propylene oxide. The mass parts corresponding to the target components are: 50-70 parts acrylamide, 40-45 parts acrylic acid, 10-20 parts styrene, 10-15 parts ethylene oxide, and 10-15 parts propylene oxide; wherein the mass addition ratio of the polymerization inhibitor to the solid aging oil is 1:500 to 1:1000.

[0014] In some embodiments, the method further includes: performing a stirring process based on a stirring mechanism in the processing environment; the stirring process includes the following two stages: a first stirring process stage for stirring the added solid aging oil, and a second stirring process stage for stirring the aging oil and the added polymerization inhibitor together.

[0015] The technical solutions provided in the embodiments of this disclosure have at least some or all of the following advantages:

[0016] In the aforementioned processing device, a sealed processing environment is provided for the polymer-type solid aged oil to be processed by setting up a processing tank. A preset processing temperature is provided by setting up a heating element. At the preset processing temperature, the polymer-type solid aged oil will gradually transform into a liquid state. During the transformation, a polymerization inhibitor is added through a dosing device. Based on the polymerization inhibitor, the solid aged oil undergoes a polymerization-breaking treatment. Because the polymerization inhibitor molecules react with the chain free radicals in the liquid aged oil to form non-free radical substances or low-activity free radicals that cannot be initiated, the polymerization is terminated, preventing the polymerization and solidification of the liquid aged oil. Even if the temperature is subsequently lowered, it can remain in a liquid state and will not polymerize again, resulting in liquid crude oil that meets recycling standards. This liquid crude oil can be directly entered into the crude oil gathering and transportation system and transported to downstream systems. At the same time, since the entire aged oil processing process is carried out in a closed environment, the processing process is environmentally friendly. It eliminates the need to send it to a third party for processing or to filter the solid phase, which not only avoids the loss of crude oil but also effectively improves the processing efficiency of aged oil and significantly reduces processing costs. In addition, the added polymerization inhibitor, as an auxiliary agent, can be used for recycling while maintaining the properties of crude oil, effectively improving the quality of the processed crude oil. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a polymer-type solid aging oil treatment apparatus according to an embodiment of the present disclosure is shown.

[0020] Figure 2 A flowchart illustrating a method for treating polymer-type solid aging oil according to an embodiment of the present disclosure is shown schematically.

[0021] Figure 3 The diagram illustrates a process of treating aging oil using a polymer-based solid aging oil treatment method according to an embodiment of the present disclosure.

[0022] Figure 4 The diagram illustrates a process of treating aging oil according to another embodiment of the present disclosure using a polymer-based solid aging oil treatment method.

[0023] [Attached image labels]

[0024] 1-Processing device;

[0025] 11-Processing box;

[0026] 111 - Feed inlet; 112 - Chemical inlet;

[0027] 113 - Processing exports;

[0028] 12-Heating element;

[0029] 13-Dosing device;

[0030] 131-Dosing pump; 132-Drug storage tank;

[0031] 14-Stirring mechanism;

[0032] 141 - Agitator;

[0033] 1411 - Stirring shaft; 1412 - Blades;

[0034] 142 - Stirring drive component;

[0035] 15-Oil pipeline; 16-Oil pump;

[0036] 171 - First valve; 172 - Second valve;

[0037] 18 - Control valve. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0039] The first exemplary embodiment of this disclosure provides a processing apparatus for polymer-type solid aged oil. The processing apparatus provided in this embodiment can be applied to the processing of aged oil in gathering and transportation stations, or to the processing of aged oil with similar properties in other scenarios.

[0040] This embodiment illustrates the processing of aged oil within a gathering and transportation station. It is understood that the processing apparatus and method provided in this disclosure are also applicable to the processing of various types of polymer-type solid aged oils. In one exemplary scenario, the aged oil in the gathering and transportation station is polymer-type aged oil. Testing revealed that it contains 97.5% grease, 2.42% polymer, and 0.08% water, with no other impurities. This type of aged oil tends to gradually solidify below 45°C.

[0041] Currently, the common treatment for aged oil in gathering and transportation stations is to filter out the solid phase, which results in significant resource waste. Some solutions involve outsourcing the treatment of polymer-type solid aged oil to third-party organizations, requiring additional transportation, processing time, and economic costs. Furthermore, these processes are mostly conducted in non-enclosed environments, causing environmental pollution. In addition, most related technologies for aged oil treatment are designed for oil-water emulsion aged oils, using demulsifiers, which are suitable for emulsified aged oils but not for polymer-type solid aged oils. The non-enclosed environment treatment also contributes to environmental pollution.

[0042] In view of this, the processing apparatus provided in this embodiment can process polymer-type solid aging oil in an environmentally friendly and efficient manner. By setting up a processing tank to provide a sealed processing environment for the polymer-type solid aging oil to be processed, and by setting up a heating element to provide a preset processing temperature, the polymer-type solid aging oil will gradually transform into a liquid state. During the transformation, a polymerization inhibitor is added through a dosing device. Based on the polymerization inhibitor, the solid aging oil is subjected to polymerization-breaking treatment. Because the polymerization inhibitor molecules react with the chain free radicals in the liquid aging oil to form non-free radical substances or low-activity free radicals that cannot be initiated, the polymerization is terminated, hindering the polymerization and solidification of the liquid aging oil. Subsequently, even if the temperature is lowered, it can remain in a liquid state and no longer polymerize, resulting in liquid crude oil that meets the recycling standards. This liquid crude oil can be directly entered into the crude oil gathering and transportation system and transported to the downstream system.

[0043] Figure 1 A schematic diagram of a polymer-type solid aging oil treatment apparatus according to an embodiment of the present disclosure is shown.

[0044] Reference Figure 1 As shown in the figure, the polymer-type solid aging oil treatment device 1 provided in this embodiment includes: a treatment tank 11 and a dosing device 13.

[0045] The aforementioned processing chamber 11 is used to provide a sealed processing environment; the aforementioned processing chamber 11 is provided with a feeding port 111 and a chemical dosing port 112, the aforementioned feeding port 111 is used to add the polymer-type solid aging oil to be processed; the aforementioned processing chamber 11 is provided with a heating element 12, the aforementioned heating element is used to heat so that the aforementioned processing environment maintains a preset processing temperature.

[0046] The aforementioned dosing device 13 is connected to the aforementioned dosing port 112, in Figure 1 The arrows also indicate the direction of chemical addition; the dosing device 13 is used to add the polymerization inhibitor into the treatment tank 11. At a preset treatment temperature, the solid aged oil is subjected to polymerization-breaking treatment based on the polymerization inhibitor to obtain liquid crude oil that meets recycling standards.

[0047] In some embodiments, the interior of the processing chamber 11 is provided with a corrosion-resistant coating, and the exterior of the processing chamber has an insulation layer. In some applications, the processing chamber 11 is 50m². 3 ~60m 3 The rectangular box is made of steel plate with a thickness of 8mm to 10mm, which has good sealing and heat preservation performance and can withstand a certain pressure.

[0048] In some embodiments, the feed port 111 is equipped with a cover plate. A circular hole (800mm in diameter) is provided on the top of the aforementioned processing box 11.

[0049] The aforementioned heating element 12 includes a heating coil installed inside the chamber for heating the substances added to the processing environment to reach the required processing temperature. For example, in some embodiments, the preset processing temperature is 50℃ to 90℃. For instance, setting the preset processing temperature to 85℃ to 90℃ is beneficial for accelerating the processing of aged oil. The specific heat preservation time can be adjusted according to the actual situation, ranging from one hour to several hours.

[0050] The heat from the heating coils comes from the circulating heat source of the gathering and transmission station, including at least one of the following: steam heat energy, hot water heat energy, electric resistance heating energy, fuel heat energy, etc.

[0051] In some embodiments, refer to Figure 1 As shown, the above-mentioned processing device 1 further includes a stirring mechanism 14. The stirring mechanism 14 is assembled with the processing tank 11 and is used to stir the solid aged oil in the processing environment, or to stir the aged oil and the polymerization inhibitor in the processing environment. By stirring, the solid aged oil is cut into a dispersed state, and the aged oil is heated evenly and its melting is accelerated at a preset processing temperature. Stirring after adding the polymerization inhibitor can promote the full mixing of the aged oil and the polymerization inhibitor and improve the polymerization inhibition effect.

[0052] In some embodiments, refer to Figure 1 As shown, the stirring mechanism 14 includes a stirring paddle 141 and a stirring drive 142.

[0053] The aforementioned stirring paddle 141 is located inside the aforementioned processing tank 11 and includes: a stirring shaft 1411 and a plurality of blades 1412, wherein the plurality of blades 1412 are spirally distributed on the outer periphery of the aforementioned stirring shaft 1411.

[0054] Among them, the aforementioned multiple blades 1412 have multiple different tilt angles, which are used to generate tangential forces at different angles.

[0055] In the aforementioned impeller, multiple blades have different inclination angles, generating tangential forces at varying angles. This causes the polymer-type solid aged oil to be broken into a dispersed state under the multi-directional shear forces of the blades and its melting accelerated at a preset treatment temperature. The aforementioned inclination angle is the angle between the extended surface of the blade and the stirring shaft. The extended surface of each blade can be a plane or a curved surface, or it can have some detailed shapes, such as protrusions, on a planar structure to enhance the intensity of the shear force and the variety of shear angles during stirring, thereby improving the accelerating effect of stirring on the melting of solid aged oil and ensuring sufficient contact between the liquid aged oil and the polymerization inhibitor.

[0056] Reference Figure 1As shown, some blades are horizontally aligned radially from the inside out, while others are angled downwards radially from the inside out. In some embodiments, all blades may be angled downwards radially from the inside out, but this is not illustrated here.

[0057] Since at least some of the blades are radially inclined downwards from the inside out, when these blades cut the polymer-type solid aging oil, the solid aging oil adhering to the blades can be thrown off by the combined action of the rotational inertia of the impeller 141 and gravity, leaving very little residue, which greatly reduces the adhesion loss of the stirring mechanism during operation.

[0058] The stirring drive unit 142 is connected to the stirring shaft 1411 of the stirring paddle 141 and is located outside the processing tank 11. It is used to drive the stirring paddle 141 to perform controllable stirring.

[0059] In some embodiments, the stirring drive 142 can be a mechanically operated drive or an electrically controlled drive, which can be manually operated or automatically controlled. As an example, the stirring drive can be a drive motor.

[0060] In some embodiments, the stirring mechanism can move up and down along the axial direction and rotate around the axis under the driving action of the stirring drive, with a rotation speed of 500 rpm to 1200 rpm.

[0061] In some embodiments, refer to Figure 1 As shown, the aforementioned processing device 1 further includes an oil pipeline 15. The oil pipeline 15 is connected to the processing outlet 113 of the processing tank 11 and is used to transport liquid crude oil that meets recycling standards to the target downstream (e.g., an oil depot, downstream refinery, etc.). The oil pipeline 15 is equipped with an oil pump 16, a first valve 171, and a second valve 172 for controlling the on / off state of the oil pipeline. The first valve 171 is located at the inlet of the oil pump 16, and the second valve 172 is located at the outlet of the oil pump 16. The oil pump 16 provides power for long-distance transmission.

[0062] In some embodiments, refer to Figure 1 As shown, the oil pipeline 15 is also equipped with a straight-through pipeline branching off in parallel with the pipeline where the oil pump 16 is located. This straight-through pipeline is used to directly transport the liquefied crude oil processed by the processing tank 11 to the downstream target without passing through the oil pump. A control valve 18 is installed on the straight-through pipeline to control the opening and closing of the pipeline. In some embodiments, the oil pump is a screw-type oil pump with a corresponding drive motor.

[0063] Reference Figure 1As shown, the above-mentioned dosing device 13 includes: a storage tank 132 and a dosing pump 131, wherein the dosing pump 131 is used to controllably add the polymerization inhibitor in the storage tank 132 into the processing tank 11.

[0064] The polymerization inhibitors provided in the embodiments of this disclosure can be various reagents that meet the requirements. Any polymerization inhibitor that can break the polymerization of polymer-type solid aging oil is within the protection scope of this disclosure.

[0065] In some embodiments, the polymerization inhibitor is obtained from the target component through a polymerization reaction; the target component includes: acrylamide, acrylic acid, styrene, ethylene oxide, and propylene oxide. The mass parts corresponding to the target component are: 50-70 parts acrylamide, 40-45 parts acrylic acid, 10-20 parts styrene, 10-15 parts ethylene oxide, and 10-15 parts propylene oxide.

[0066] In some embodiments, the acrylamide is obtained by hydrolysis of acrylonitrile, and the corresponding chemical reaction equation (specific reaction conditions, such as catalyst and high temperature, are omitted for simplicity) is as follows:

[0067] CH2=CHCN+H2O→CH2=CHCONH2. (1)

[0068] In some embodiments, the acrylic acid is obtained by propylene oxidation, and the corresponding step-by-step chemical reaction equation (for simplicity, reaction conditions such as catalyst and high temperature are omitted) is as follows:

[0069] CH2=CH-CH3+O2→CH2=CH-CHO+H2O, (2-1)

[0070] CH2=CH-CHO+1 / 2O2→CH2=CH-COOH, (2-2)

[0071] The overall chemical reaction equation (reaction conditions such as catalyst and high temperature are omitted for simplicity) is as follows:

[0072] CH2=CH-CH3+3 / 2O2→CH2=CH-COOH+H2O. (2)

[0073] In some embodiments, the above-mentioned styrene is produced by catalytic dehydrogenation of ethylbenzene, and the corresponding chemical reaction equation (for simplicity, reaction conditions such as catalyst and high temperature are omitted) is as follows:

[0074] C6H5CH2CH3→C6H5CH=CH2+H2. (3)

[0075] In some embodiments, the above-mentioned ethylene oxide is prepared by the oxidation of ethylene, and the corresponding chemical reaction equation (for simplicity, reaction conditions such as catalyst and high temperature are omitted) is as follows:

[0076] 2CH2=CH2+O2→2C2H4O. (4)

[0077] In some embodiments, the above-mentioned propylene oxide is prepared by the chlorohydrin method, and the corresponding step-by-step chemical reaction equation (for simplicity, reaction conditions such as catalyst and high temperature are omitted) is as follows:

[0078] CH3CH=CH2+Cl2+H2O→CH3CHOHCH2Cl+HCl, (5-1)

[0079] CH3CHOHCH2Cl+HCl+Ca(OH)2→CH3CHCH2O+CaCl2+2H2O, (5-2)

[0080] The overall chemical reaction equation (reaction conditions such as catalyst and high temperature are omitted for simplicity) is as follows:

[0081] CH3CH=CH2+Cl2+Ca(OH)2→CH3CHCH2O+CaCl2+H2O. (5)

[0082] In some embodiments, the mass ratio of the above-mentioned polymerization inhibitor to the above-mentioned solid aging oil is 1:500 to 1:1000. For each kilogram of solid aging oil, the amount of polymerization inhibitor added is 2000 mg / kg to 1000 mg / kg, for example, in this embodiment, the amount of polymerization inhibitor added is 1500 mg / kg.

[0083] In the embodiments of this disclosure, the principle by which the polymerization inhibitor can treat aged oil includes: the polymerization inhibitor molecules react with the chain free radicals in the liquid aged oil to form non-free radical substances or low-activity free radicals that cannot be initiated, thereby terminating the polymerization and hindering the polymerization and solidification of the liquid aged oil. Even if the temperature is subsequently lowered, it can remain in a liquid state and no longer polymerize, resulting in liquid crude oil that meets recycling standards. This liquid crude oil can be directly fed into the crude oil gathering and transportation system and transported to downstream systems. Furthermore, since the entire aged oil treatment process is conducted in a closed environment, the process is environmentally friendly; it eliminates the need for third-party processing or solid phase filtration, thus preventing crude oil loss, effectively improving the processing efficiency of aged oil, and significantly reducing processing costs. Simultaneously, the added polymerization inhibitor, as an auxiliary agent, can be recycled while maintaining the properties of the crude oil, effectively improving the quality of the treated crude oil. After these liquid crude oils containing the polymerization inhibitor are transported to downstream systems, the downstream systems can further separate and purify the polymerization inhibitor during subsequent crude oil processing or refining to obtain more useful products. Therefore, the crude oil obtained after treating polymer-type solid aged oil in the embodiments of this disclosure has a high quality.

[0084] The following describes the process of processing polymer-type solid aging oil using the processing apparatus provided in the embodiments of this disclosure.

[0085] During the treatment of aged oil using a processing device without a stirring mechanism, polymer-type solid aged oil is introduced into the processing tank 11 through the feed port 111. Heating by the heating element 12 maintains the processing environment at 85°C–90°C, causing the introduced solid aged oil to gradually transform into a liquid state. During this transformation, a polymerization inhibitor is added into the processing tank via the dosing device 13. The polymerization inhibitor molecules react with the chain radicals in the liquid aged oil, forming non-radical substances or low-activity free radicals that cannot be initiated, thereby terminating polymerization and preventing the liquid aged oil from solidifying. Even if the temperature subsequently decreases, it can remain in a liquid state and no longer polymerize, resulting in liquid crude oil that meets recycling standards. This liquid crude oil is then transported downstream via an oil pipeline. In this process, the polymer-type solid aged oil gradually transforms into liquid crude oil under the combined effects of heating and polymerization inhibition, and even if the temperature subsequently decreases, it can remain in a liquid state and no longer polymerize due to the action of the polymerization inhibitor. Through repeated cycles of batch feeding, maintaining a preset processing temperature, adding polymerization inhibitors, and recycling oil, the solid aged oil, which is in a polymerized state, is converted into qualified crude oil, thus realizing the recycling of aged oil. For example, after the aged oil has completely turned into a liquid, the inlet and outlet valves of the screw pump are opened, the screw pump is started, and the qualified liquid aged oil is transported to the downstream oil depot or refinery.

[0086] During the treatment of aged oil using a processing device including a stirring mechanism, polymer-type solid aged oil is added into the processing tank 11 through the feed port 111. Heating by the heating element 12 maintains the processing environment at 85°C to 90°C. After the aged oil fills the processing tank to a preset ratio (e.g., 1 / 3 to 1 / 4 of its volume), the stirring mechanism is activated. Under the combined effects of high temperature and stirring, the added solid aged oil gradually transforms into a liquid state. During this transformation, a polymerization inhibitor is added into the processing tank through the dosing device 13. The stirring mechanism remains operational throughout this process. The specific stirring mode can be continuous stirring (stirring continuously) or intermittent stirring (stirring intermittently). The polymerization inhibitor molecules react with the chain free radicals in the liquid aged oil to form non-free radical substances or low-activity free radicals that cannot be initiated, thereby terminating polymerization and hindering the polymerization and solidification of the liquid aged oil. Even if the temperature subsequently decreases, it can remain in a liquid state and no longer polymerize, resulting in liquid crude oil that meets recycling standards. This liquid crude oil is then transported downstream via an oil pipeline. In this process, polymer-type solid aged oil can be transformed into liquid crude oil more quickly under the combined action of heating, polymerization inhibition, and stirring. Even when the temperature is subsequently reduced, it can remain in a liquid state and stop polymerizing due to the action of the polymerization inhibitor. Through multiple cycles of batch feeding, maintaining the preset treatment temperature, stirring, adding polymerization inhibitor, and recycling oil, all the solid aged oil in the polymerized state is converted into qualified crude oil, realizing the recycling of aged oil.

[0087] In summary, the processing apparatus provided in this embodiment provides a sealed processing environment for the polymer-type solid aged oil by setting up a processing tank, and provides a preset processing temperature by setting up a heating element. At the preset processing temperature, the polymer-type solid aged oil will gradually transform into a liquid state. During the transformation, a polymerization inhibitor is added through a dosing device. Based on the polymerization inhibitor, the solid aged oil is subjected to polymerization-breaking treatment. Because the polymerization inhibitor molecules react with the chain free radicals in the liquid aged oil to form non-free radical substances or low-activity free radicals that cannot be initiated, the polymerization is terminated, hindering the polymerization and solidification of the liquid aged oil. Even if the temperature is subsequently lowered, it can remain in a liquid state and will not polymerize again, resulting in liquid crude oil that meets the recycling standards. This liquid crude oil can be directly entered into the crude oil gathering and transportation system and transported to downstream systems. At the same time, since the entire aged oil processing process is carried out in a closed environment, the processing process is environmentally friendly. It no longer needs to be sent to a third party for processing or the solid phase needs to be filtered, which can not only avoid the loss of crude oil, but also effectively improve the processing efficiency of aged oil and significantly reduce the processing cost. Meanwhile, the added polymerization inhibitor, as an auxiliary agent, can be used for recycling while maintaining the properties of crude oil, effectively improving the quality of the processed crude oil.

[0088] Based on the same technical concept, a second exemplary embodiment of this disclosure provides a method for treating polymer-type solid aging oil. The treatment method provided in this embodiment can be implemented using the treatment apparatus provided in the first embodiment or using other equipment with similar structure or function.

[0089] Figure 2 A flowchart illustrating a method for treating polymer-type solid aging oil according to an embodiment of the present disclosure is shown schematically. Figure 3 The diagram illustrates a process of treating aging oil using a polymer-based solid aging oil treatment method according to an embodiment of the present disclosure.

[0090] Reference Figure 2 and Figure 3 As shown in the embodiments of this disclosure, the method for treating polymer-type solid aging oil includes the following steps: S210 and S220.

[0091] In step S210, the polymer-type solid aging oil to be treated is placed in a sealed treatment environment and kept at a preset treatment temperature. At the preset treatment temperature, the solid aging oil gradually transforms into a liquid state.

[0092] For example, refer to Figure 3 As shown, the sealed processing environment is provided by the processing chamber, combined with Figure 1 As shown, the above-mentioned treatment box 11 is provided with a feeding port 111 and a chemical dosing port 112. The feeding port 111 is used to add polymer-type solid aging oil to be treated. The above-mentioned treatment box 11 is provided with a heating element 12, which is used to heat the above-mentioned treatment environment to maintain a preset treatment temperature, for example, 85°C to 90°C.

[0093] In some embodiments, the interior of the processing chamber 11 is provided with a corrosion-resistant coating, and the exterior of the processing chamber has an insulation layer. In some applications, the processing chamber 11 is 50m². 3 ~60m 3 The rectangular box is made of steel plate with a thickness of 8mm to 10mm, which has good sealing and heat preservation performance and can withstand a certain pressure.

[0094] Further details about the processing box can be found in the description of the processing apparatus provided in the first embodiment.

[0095] In step S220, a polymerization inhibitor is added during the conversion, and the solid aged oil is subjected to depolymerization treatment based on the polymerization inhibitor to obtain liquid crude oil that meets the recycling standards.

[0096] In some embodiments, combined with Figure 1 and Figure 3As shown, the polymerization inhibitor can be added through the dosing device 13 connected to the dosing port 112 of the above-mentioned treatment box 11. Figure 3 The process of adding polymer-type solid aging oil is indicated by a single arrow, while the process of adding polymerization inhibitors is indicated by a double arrow.

[0097] The above-mentioned dosing device 13 includes a storage tank 132 and a dosing pump 131, wherein the dosing pump 131 is used to controllably add the polymerization inhibitor from the storage tank 132 into the processing tank 11.

[0098] The polymerization inhibitors provided in the embodiments of this disclosure can be various reagents that meet the requirements. Any polymerization inhibitor that can break the polymerization of polymer-type solid aging oil is within the protection scope of this disclosure.

[0099] In some embodiments, the polymerization inhibitor is obtained from the target components through a polymerization reaction; the target components include: acrylamide, acrylic acid, styrene, ethylene oxide, and propylene oxide. The mass parts corresponding to the target components are: 50-70 parts acrylamide, 40-45 parts acrylic acid, 10-20 parts styrene, 10-15 parts ethylene oxide, and 10-15 parts propylene oxide; wherein the mass addition ratio of the polymerization inhibitor to the solid aging oil is 1:500 to 1:1000.

[0100] By setting a polymerization inhibitor containing the above components, a good polymerization inhibition effect can be achieved for polymer-type solid aging oils.

[0101] Figure 4 The diagram illustrates a process of treating aging oil according to another embodiment of the present disclosure using a polymer-based solid aging oil treatment method.

[0102] In some embodiments, refer to Figure 4 As shown, the above method further includes: performing a stirring process based on a stirring mechanism in the above processing environment; the stirring process includes the following two stages: a first stirring process stage for stirring the added solid aged oil, and a second stirring process stage for stirring the aged oil and the added polymerization inhibitor together. Stirring breaks the solid aged oil into a dispersed state, ensuring uniform heating of the aged oil at a preset processing temperature and promoting its accelerated melting; stirring after adding the polymerization inhibitor promotes thorough mixing of the aged oil (during the transition, the aged oil can be a mixture of solid and liquid states) and the polymerization inhibitor, and enhances the polymerization inhibition effect.

[0103] In some application scenarios, refer to Figure 1 As shown, the stirring operation in this method can be achieved by the stirring mechanism 14 assembled with the above-mentioned processing box 11.

[0104] In the processing method provided in this embodiment, a sealed processing environment is provided for the polymer-type solid aged oil to be processed, and a preset processing temperature is maintained in the processing environment. At the preset processing temperature, the polymer-type solid aged oil will gradually transform into a liquid state. During the transformation, a polymerization inhibitor is added through a dosing device. Based on the polymerization inhibitor, the solid aged oil is subjected to depolymerization treatment. Because the polymerization inhibitor molecules react with the chain free radicals in the liquid aged oil to form non-free radical substances or low-activity free radicals that cannot be initiated, the polymerization is terminated, hindering the polymerization and solidification of the liquid aged oil. Subsequently, even if the temperature is lowered, it can remain in a liquid state and will not polymerize again, resulting in liquid crude oil that meets the recycling standards. This liquid crude oil can be directly entered into the crude oil gathering and transportation system and transported to the downstream system. At the same time, since the entire aged oil processing process is carried out in a closed environment, the processing process is environmentally friendly. It is no longer necessary to send it to a third party for processing or to filter the solid phase, which can not only avoid the loss of crude oil, but also effectively improve the processing efficiency of aged oil and significantly reduce the processing cost. At the same time, the added polymerization inhibitor, as an auxiliary agent, can be used for recycling while maintaining the properties of crude oil, effectively improving the quality of the processed crude oil.

[0105] In some embodiments, by setting a stirring operation, the solid aged oil is cut into a dispersed state by stirring, and the aged oil is heated evenly and its melting is accelerated at a preset processing temperature; stirring after adding the polymerization inhibitor can promote the full mixing of the aged oil (during the transformation, the aged oil can be a mixture of solid and liquid states) and the polymerization inhibitor and improve the polymerization inhibition effect.

[0106] In some application cases, the processing method and processing device provided in the embodiments of this disclosure are used to process aging oil in gathering and transportation stations. The aging oil product after processing is completely converted from solid to liquid, and the recovery rate and qualification rate of aging oil both reach 100%. It can meet the production requirements of industrial-scale processing of aging oil. The qualified oil products after processing can directly enter the crude oil gathering and transportation system, which can improve the quantity and quality of qualified commercial oil, improve the effective storage capacity and oil transportation efficiency of gathering and transportation stations, ensure the safe and stable production of oil and gas gathering and transportation and gathering and transportation stations, and avoid the risk of crude oil loss caused by entrusting the oil products to professional processing companies. The economic and social benefits are significant, and it has broad application prospects.

[0107] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, 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 said element.

[0108] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for treating polymer-type solid aging oil, characterized in that, include: A processing chamber is provided to provide a sealed processing environment; the processing chamber is equipped with a feed port and a chemical dosing port, the feed port being used to add the polymer-type solid aging oil to be processed; The processing chamber is equipped with a heating element, which is used to heat the processing environment to maintain a preset processing temperature. A dosing device, connected to the dosing port, is used to add a polymerization inhibitor into the treatment tank; In this process, at a preset processing temperature, the solid aged oil is subjected to polymerization-breaking treatment based on the polymerization inhibitor to obtain liquid crude oil that meets the recycling standards.

2. The apparatus according to claim 1, characterized in that, The polymerization inhibitor is obtained from the target component through a polymerization reaction; The target components include: acrylamide, acrylic acid, styrene, ethylene oxide, and propylene oxide; The target components are in the following mass fractions: 50-70 parts acrylamide, 40-45 parts acrylic acid, 10-20 parts styrene, 10-15 parts ethylene oxide, and 10-15 parts propylene oxide.

3. The apparatus according to claim 1, characterized in that, The mass ratio of the polymerization inhibitor to the solid aging oil is 1:500 to 1:1000.

4. The apparatus according to any one of claims 1-3, characterized in that, Also includes: A stirring mechanism, assembled with the processing tank, is used to stir the solid aged oil in the processing environment, or to stir the aged oil and polymerization inhibitor in the processing environment.

5. The apparatus according to claim 4, characterized in that, The stirring mechanism includes: The stirring paddle, located inside the processing tank, comprises: a stirring shaft and multiple blades, the multiple blades being spirally distributed around the outer periphery of the stirring shaft; wherein, the multiple blades have multiple different tilt angles for generating tangential forces at different angles; at least some of the multiple blades are radially inclined downwards from the inside out. A stirring drive unit, connected to the stirring shaft, is located outside the processing tank and is used to drive the stirring paddle for controllable stirring.

6. The apparatus according to claim 1, characterized in that, Also includes: An oil pipeline is connected to the processing outlet of the processing tank and is used to transport liquid crude oil that meets the recycling standards to the target downstream. The oil pipeline is equipped with an oil pump, a first valve and a second valve for controlling the on / off of the oil pipeline. The first valve is located at the inlet of the oil pump and the second valve is located at the outlet of the oil pump.

7. The apparatus according to claim 1, characterized in that, The heating element includes: a heating coil laid inside the box body, used to heat the material added to the processing environment to reach the required processing temperature; the heat of the heating coil comes from the circulating heat source of the gathering and transmission station, including at least one of the following: steam heat energy, hot water heat energy, electric resistance heating energy, and fuel heat energy; The interior of the processing box is equipped with a corrosion-resistant coating, and the exterior of the processing box has an insulation layer.

8. A method for treating polymer-based solid aging oil, characterized in that, include: The polymer-type solid aging oil to be treated is placed in a sealed treatment environment and kept at a preset treatment temperature. At the preset treatment temperature, the solid aging oil is gradually transformed into a liquid state. During the transformation, a polymerization inhibitor is added. Based on the polymerization inhibitor, the solid aging oil is subjected to depolymerization treatment to obtain liquid crude oil that meets the recycling standards.

9. The method according to claim 8, characterized in that, The polymerization inhibitor is obtained from the target component through a polymerization reaction; The target components include: acrylamide, acrylic acid, styrene, ethylene oxide, and propylene oxide; The target components are in the following mass fractions: 50-70 parts acrylamide, 40-45 parts acrylic acid, 10-20 parts styrene, 10-15 parts ethylene oxide, and 10-15 parts propylene oxide. The mass ratio of the polymerization inhibitor to the solid aging oil is 1:500 to 1:1000.

10. The method according to claim 8 or 9, characterized in that, Also includes: The stirring process is carried out in the processing environment based on a stirring mechanism; the stirring process includes the following two stages: a first stirring process stage in which the added solid aged oil is stirred, and a second stirring process stage in which the aged oil and the added polymerization inhibitor are stirred together.

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