Controllable oxygen reduction oxidation pyrolysis shale oil yield simulation device

Abstract

The embodiment of the utility model provides a controllable oxygen reduction, oxidation and pyrolysis shale oil yield simulation device, and relates to the technical field of heating, discharging and mining of shale oil. The device comprises a gas inlet module, a shale oil pyrolysis module, a product collection module, an oil-water separation module and a central container module, the gas inlet module is connected with the shale oil pyrolysis module, and the central container module can be connected between the gas inlet module and the shale oil pyrolysis module; the shale oil pyrolysis module is connected with the product collection module; and the product collection module is connected with the oil-water separation module. According to the device, the optimal pyrolysis condition can be determined, and a theoretical basis of pyrolysis is provided for actual production, so that the pyrolysis efficiency and yield of shale oil are improved.

Description

Technical Field

[0001] This application relates to the technical field of shale oil heating and production, and particularly to a simulation device for the yield of controllable oxygen-reduced oxidation pyrolysis of shale oil. Background Art

[0002] Shale oil refers to the petroleum resources contained in shale formations mainly composed of shale. As one of the important unconventional oil and gas resources, shale oil has attracted much attention due to its rich reserves.

[0003] Medium-low maturity shale oil reservoirs are rich in untransformed kerogen. In-situ conversion technology is needed to in-situ convert a large amount of heavy organic matter retained underground into light oil and natural gas to achieve clean, environmentally friendly, safe and efficient exploitation of shale oil and gas. The existing in-situ conversion technology by gas injection usually injects high-temperature steam, high-temperature carbon dioxide, high-temperature nitrogen and other inert gases underground, and uses convective heating to pyrolyze and extract shale oil.

[0004] However, the existing exploitation devices have the problem of low pyrolysis efficiency. Summary of the Utility Model

[0005] The embodiments of this application provide a simulation device for the yield of controllable oxygen-reduced oxidation pyrolysis of shale oil to solve the problem of low pyrolysis efficiency existing in the existing exploitation devices.

[0006] In a first aspect, the embodiments of this application provide a simulation device for the yield of controllable oxygen-reduced oxidation pyrolysis of shale oil, including a gas inlet module, a shale oil pyrolysis module, a product collection module, and an oil-water separation module; the gas inlet module is connected to the shale oil pyrolysis module; the shale oil pyrolysis module is connected to the product collection module; the product collection module is connected to the oil-water separation module;

[0007] The gas inlet module is used to introduce gas into the shale oil pyrolysis module;

[0008] The shale oil pyrolysis module is used to receive gas and discharge pyrolysis products;

[0009] The product collection module is used to collect pyrolysis products and discharge condensate products;

[0010] The oil-water separation module is used to separate condensate products and discharge aqueous phase products and oil phase products.

[0011] In a possible implementation manner, the gas inlet module includes an air gas cylinder 1, a first control valve 2, a first gas flow controller 3, and a first flowmeter 4 sequentially installed in the gas passage between the output end of the air gas cylinder 1 and the shale oil pyrolysis module;

[0012] By adjusting the first control valve 2 and the first gas flow controller 3, the air flow at the output end of the air gas cylinder 1 is controlled;

[0013] The first flowmeter 4 is used to monitor the air flow rate at the output end of the air cylinder 1.

[0014] In a possible implementation, the gas inlet module further includes an inert gas cylinder 26, a second control valve 25, a second gas flow controller 24, and a second flowmeter 23 that are sequentially installed in the gas passage between the output end of the inert gas cylinder 26 and the shale oil pyrolysis module;

[0015] By adjusting the second control valve 25 and the second gas flow controller 24, the inert gas flow rate at the output end of the inert gas cylinder 26 is controlled;

[0016] The second flowmeter 23 is used to monitor the inert gas flow rate at the output end of the inert gas cylinder 26.

[0017] In a possible implementation, the gas inlet module further includes a gas discharge port and a gas discharge valve for controlling the opening and closing of the gas discharge port; the gas discharge port and the gas discharge valve are fixed on the gas passage after the first flowmeter 4 and the second flowmeter 23;

[0018] When adjusting the first control valve 2 and the first gas flow controller 3, the gas discharge valve is opened to discharge the air through the gas discharge port until the air flow rate monitored by the first flowmeter 4 is stable, and then the gas discharge valve is closed to introduce the air into the shale oil pyrolysis module;

[0019] When adjusting the second control valve 25 and the first gas flow controller 3, the gas discharge valve is opened to discharge the inert gas through the gas discharge port until the inert gas flow rate monitored by the second flowmeter 23 is stable, and then the gas discharge valve is closed to introduce the inert gas into the shale oil pyrolysis module.

[0020] In a possible implementation, the device further includes a central container module, which includes a central container 5, a third control valve 6, a third gas flow controller 7, and a third flowmeter 8 that are sequentially installed in the gas passage between the output end of the central container 5 and the shale oil pyrolysis module; the input end of the central container 5 is connected to the output end of the gas inlet module;

[0021] The central container 5 is used to fuse air and inert gas and introduce the fused gas into the shale oil pyrolysis module;

[0022] By adjusting the third control valve 6 and the third gas flow controller 7, the flow rate of the fused gas at the output end of the central container 5 is controlled;

[0023] The third flowmeter 8 is used to monitor the flow rate of the fused gas at the output end of the central container 5.

[0024] In a possible implementation, the shale oil pyrolysis module includes an oxidative pyrolysis chamber 9, a heating controller 10, and a heat insulation layer 11 installed outside the oxidative pyrolysis chamber 9;

[0025] The heating controller 10 is used to heat the oxidative pyrolysis chamber 9;

[0026] The oxidative pyrolysis chamber 9 is used to receive gas and discharge pyrolysis products.

[0027] In a possible implementation, the product collection module includes an oil-water collection bottle 15, a condensation heat insulation cover 16, a condensation heat insulation layer 17, a condensation temperature controller 18, a condensation medium 19, and a fifth control valve 13 connected between the output end of the shale oil pyrolysis module and the input end of the oil-water collection bottle 15;

[0028] The body of the oil-water collection bottle 15 is embedded in the condensation heat insulation layer 17, and the condensation medium 19 is added to the condensation heat insulation layer 17;

[0029] The condensation heat insulation cover 16 is fixed to the top of the oil-water collection bottle 15 and the condensation heat insulation layer 17.

[0030] In a possible implementation, the product collection module further includes a gas collection part 14 and a fourth control valve 12 connected between the output end of the shale oil pyrolysis module and the input end of the gas collection part 14.

[0031] In a possible implementation, the oil-water separation module includes an oil-water separator 20, a water collection part 21, and an oil collection part 22;

[0032] The oil-water separator 20 is used to separate the condensation products and discharge the aqueous phase products and the oil phase products;

[0033] The water collection part 21 is used to collect the aqueous phase products;

[0034] The oil collection part 22 is used to collect the oil phase products.

[0035] In a possible implementation, the oil-water separator 20 is an azeotropic oil-water separator.

[0036] The controllable oxygen-reducing oxidation pyrolysis shale oil yield simulation device provided by the embodiments of the present application has a modular design, including a gas inlet module, a shale oil pyrolysis module, a product collection module, an oil-water separation module, and a central container module. By controlling the gas type and flow rate entering the shale oil pyrolysis module through the gas inlet module, precise control of the pyrolysis process can be achieved; the product collection module can efficiently collect various products generated during the pyrolysis process, reduce product loss, and improve the collection efficiency; the oil-water separation module can effectively separate the oil phase and water phase in the condensation products to ensure the final acquisition of high-purity shale oil products. Thus, the device of the present application can determine the optimal pyrolysis conditions, provide a theoretical basis for pyrolysis in actual production, and thereby improve the pyrolysis efficiency and yield of shale oil. Description of the Drawings

[0037] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0038] Figure 1 It is a schematic structural diagram of a controllable oxygen-reducing oxidation pyrolysis shale oil yield simulation device provided by the present application;

[0039] Figure 2 It is a schematic structural diagram of another controllable oxygen-reducing oxidation pyrolysis shale oil yield simulation device provided by the present application;

[0040] Figure 3 It is a specific schematic structural diagram of a controllable oxygen-reducing oxidation pyrolysis shale oil yield simulation device provided by the present application;

[0041] Figure 4 It is another specific schematic structural diagram of a controllable oxygen-reducing oxidation pyrolysis shale oil yield simulation device provided by the present application.

[0042] Explanation of the Reference Numerals:

[0043] 100 - Gas inlet module; 200 - Shale oil pyrolysis module; 300 - Product collection module; 400 - Oil-water separation module; 500 - Central container module;

[0044] 1 - Air gas cylinder; 2 - First control valve; 3 - First gas flow controller; 4 - First flowmeter; 5 - Central container; 6 - Third control valve; 7 - Third gas flow controller; 8 - Third flowmeter; 9 - Oxidative pyrolysis chamber; 10 - Heating controller; 11 - Thermal insulation layer; 12 - Fourth control valve; 13 - Fifth control valve; 14 - Gas collection part; 15 - Oil-water collection bottle; 16 - Condensing heat preservation cover; 17 - Condensing heat preservation layer; 18 - Condensing temperature controller; 19 - Condensing medium; 20 - Oil-water separator; 21 - Water collection part; 22 - Oil collection part; 23 - Second flowmeter; 24 - Second gas flow controller; 25 - Second control valve; 26 - Inert gas cylinder; 27 - First gas discharge valve; 28 - First gas discharge port; 29 - Second gas discharge valve; 30 - Second gas discharge port.

[0045] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0046] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are only examples of devices or equipment consistent with some aspects of the present application as detailed in the appended claims.

[0047] In the prior art, medium - low maturity shale oil reservoirs are rich in untransformed kerogen. These heavy organic matters need to be converted into light oil and natural gas through in - situ conversion technology to achieve clean, environmentally friendly, safe and efficient exploitation of shale oil and gas. The existing in - situ gas injection conversion technology usually injects high - temperature steam, high - temperature carbon dioxide, high - temperature nitrogen and other inert gases underground, and uses the convective heating method to increase the underground temperature, promote the pyrolysis and conversion of kerogen, so as to carry out pyrolysis exploitation of shale oil. However, taking steam, carbon dioxide, and nitrogen as the main injection gases, there are problems of difficult gas preparation and high cost. At the same time, the injection gas uses the convective heating method to heat shale oil, which means that it can only heat the formation near the wellbore, and it is difficult to effectively increase the temperature of the formation far from the wellbore, resulting in low heating efficiency.

[0048] To solve the above problems, the controllable oxygen-reduced oxidative pyrolysis shale oil yield simulation device of the present application modularizes the device, including a gas inlet module, a shale oil pyrolysis module, a product collection module, an oil-water separation module, and a central container module. By controlling the gas type and flow rate entering the shale oil pyrolysis module through the gas inlet module, precise control of the pyrolysis process can be achieved. Moreover, the injection gas in the gas inlet module mainly includes air, which can effectively reduce gas costs. Additionally, the high-temperature air pyrolysis heating process is progressive, that is, the oxygen contained in the air for the pyrolysis of shale organic matter is an exothermic oxidation reaction. The heat released during the pyrolysis process can be further transferred from the shale surface to the interior, making the pyrolysis of the shale oil block more complete. At the same time, the input of artificial heat can be reduced, and the ground cost can be lowered. Meanwhile, the product collection module can efficiently collect various products generated during the pyrolysis process, reduce product losses, and improve the collection efficiency. The oil-water separation module can effectively separate the oil phase and water phase in the condensation products to ensure the final acquisition of high-purity shale oil products. Thus, the pyrolysis conditions determined by this device can provide a theoretical basis for pyrolysis in actual production to improve the pyrolysis efficiency and yield of shale oil.

[0049] The following uses specific embodiments to elaborate in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] Referring to Figure 1 , the embodiment of the present application provides a controllable oxygen-reduced oxidative pyrolysis shale oil yield simulation device, including a gas inlet module 100, a shale oil pyrolysis module 200, a product collection module 300, and an oil-water separation module 400. The gas inlet module 100 is connected to the shale oil pyrolysis module 200. The shale oil pyrolysis module 200 is connected to the product collection module 300. The product collection module 300 is connected to the oil-water separation module 400. The gas inlet module 100 is used to introduce gas into the shale oil pyrolysis module 200. The shale oil pyrolysis module 200 is used to receive the gas and discharge the pyrolysis products. The product collection module 300 is used to collect the pyrolysis products and discharge the condensation products. The oil-water separation module 400 is used to separate the condensation products and discharge the water phase products and oil phase products.

[0051] It should be noted that the gas inlet module 100 can adjust the type and gas flow rate of the gas introduced into the shale oil pyrolysis module 200. For example, the introduced gas can be air, carbon dioxide, or a mixed gas of air and carbon dioxide fused in a certain proportion.

[0052] Put the shale oil sample into the shale oil pyrolysis module 200. After the gas from the gas inlet module 100 is introduced, due to the high-temperature environment of the shale oil pyrolysis module 200, this gas promotes the pyrolysis reaction of the shale oil sample, and the pyrolysis products generated may include gaseous products and oil-water products. The gaseous products may contain light hydrocarbons and other valuable gas components, and these valuable gaseous products are effectively collected and stored through the product collection module 300 to avoid their escape or waste; after the oil-water products are collected by the product collection module 300, condensation treatment is carried out to make it easier to separate the subsequent oil-phase and water-phase products.

[0053] Through the flexible adjustment of the gas inlet module 100, precise control of different gas types and flow rates introduced into the shale oil pyrolysis module 200 is achieved, effectively promoting the pyrolysis reaction of the shale oil sample; the series use of the product collection module 300 and the oil-water separation module 400 not only ensures the complete collection of gaseous and oil-water products, but also improves the recovery rate and purity of the products through condensation and separation treatment, thereby optimizing the pyrolysis process, providing a controllable experimental platform for the study of shale oil pyrolysis, helping to better understand the pyrolysis process, and providing a scientific basis for actual shale oil extraction and processing.

[0054] In some embodiments, please refer to Figure 1 and Figure 3 , the gas inlet module includes an air cylinder 1, a first control valve 2, a first gas flow controller 3, and a first flow meter 4 sequentially installed in the gas channel between the output end of the air cylinder 1 and the shale oil pyrolysis module; by adjusting the first control valve 2 and the first gas flow controller 3, the air flow rate at the output end of the air cylinder 1 is controlled; the first flow meter 4 is used to monitor the air flow rate at the output end of the air cylinder 1.

[0055] Among them, the air cylinder 1 is used to store and transport compressed air and introduce air into the shale oil pyrolysis module through the gas channel. During the process of introducing air into the shale oil pyrolysis module, the flow rate and pressure of the air can be adjusted and controlled by using the first control valve 2, the first gas flow controller 3, and the first flow meter 4.

[0056] Exemplarily, a first control valve 2 is installed at the output end of the air cylinder 1 to initially control the flow rate and pressure of the air; the first gas flow controller 3 is connected after the control valve to precisely control the flow rate of the air flowing into the shale oil pyrolysis module; a first flow meter 4 is installed after the first gas flow controller 3 to monitor the gas flow rate in real time and ensure the accuracy and consistency of the gas flow rate. Among them, the flow meter can be mechanical, electronic or other types, and a suitable flow meter is selected according to actual needs.

[0057] By adjusting the first control valve 2, the air flow rate and pressure at the output end of the air cylinder 1 are controlled. Then, according to the required flow rate, the first gas flow controller 3 is controlled to set the air flow parameters, further controlling the outflowing air flow rate. The air flow rate is monitored in real time through the first flowmeter 4, which can ensure that the shale oil pyrolysis module obtains continuous, controllable, and stable gas.

[0058] However, during the shale oil pyrolysis process, too high an oxygen concentration may cause coking of the shale oil. Therefore, by introducing inert gas or steam into the shale oil pyrolysis module, the oxygen concentration can be reduced, avoiding coking of the shale oil at high temperatures and ensuring the smooth progress of the pyrolysis process.

[0059] Taking the introduction of inert gas as an example (the device structure for introducing steam is similar to that for introducing inert gas), in this device, please refer to Figure 1 and Figure 3 , the gas inlet module further includes an inert gas cylinder 26, a second control valve 25, a second gas flow controller 24, and a second flowmeter 23 that are sequentially installed in the gas passage between the output end of the inert gas cylinder 26 and the shale oil pyrolysis module;

[0060] By adjusting the second control valve 25 and the second gas flow controller 24, the flow rate of the inert gas at the output end of the inert gas cylinder 26 is controlled;

[0061] The second flowmeter 23 is used to monitor the flow rate of the inert gas at the output end of the inert gas cylinder 26.

[0062] Among them, the inert gas includes but is not limited to gases such as nitrogen and carbon dioxide, as long as the gas can control the pyrolysis reaction atmosphere and avoid coking of the shale oil caused by too high an oxygen concentration.

[0063] By adjusting the second control valve 25, the flow rate and pressure of the inert gas at the output end of the inert gas cylinder 26 are controlled. Then, according to the required flow rate, the second gas flow controller 24 is controlled to set the inert gas flow parameters, further controlling the outflowing inert gas flow rate. The inert gas flow rate is monitored in real time through the second flowmeter 23, which can ensure that the shale oil pyrolysis module obtains continuous, controllable, and stable gas, and achieves the purpose of controllable oxygen reduction, avoiding coking of the shale oil at high temperatures.

[0064] During the process of adjusting the gas flow rate, the gas is in an unstable flow state. If the gas flowing into the gas passage then flows into the modules after the gas inlet module, such as the shale oil pyrolysis module or the central container module, it will affect the actual volume of the two gases, air and inert gas, flowing into the shale oil pyrolysis module or the central container, making the calculation of the oxygen concentration of the mixed gas inaccurate, thus resulting in a mismatch between the experimental oxygen concentration parameters and the final pyrolysis effect and product yield results of the experiment.

[0065] Thus, in some embodiments, refer to Figure 1 and Figure 4 , the gas inlet module further includes a gas outlet and a gas discharge valve for controlling the opening and closing of the gas outlet; the gas outlet and the gas discharge valve are fixed on the gas passage after the first flowmeter 4 and the second flowmeter 23.

[0066] It should be noted that a first gas discharge valve 27 can be installed after the first flowmeter 4 in this device, and a first gas outlet 28 is reserved for discharging the air of the unstable air flow during the process of adjusting the gas flow; a second gas discharge valve 29 is installed after the second flowmeter 23, and a second gas outlet 30 is reserved for discharging the inert gas of the unstable air flow during the process of adjusting the gas flow.

[0067] A gas outlet and a gas discharge valve for controlling the opening and closing of the gas outlet can also be provided, that is, a gas discharge valve is installed in the pipeline after the first flowmeter 4 and the second flowmeter 23, and a gas outlet is reserved to facilitate the discharge of unstable gas.

[0068] When adjusting the first control valve 2 and the first gas flow controller 3, open the first gas discharge valve 27, discharge the air through the first gas outlet 28, and close the first gas discharge valve 27 until the air flow monitored by the first flowmeter 4 is stable, and then introduce air into the shale oil pyrolysis module; when adjusting the second control valve 25 and the first gas flow controller 3, open the second gas discharge valve 29, discharge the inert gas through the second gas outlet 30, and close the second gas discharge valve 29 until the inert gas flow monitored by the second flowmeter 23 is stable, and then introduce the inert gas into the shale oil pyrolysis module.

[0069] Discharging the air and inert gas through the gas discharge valve, closing the gas discharge valve after the flow is stable and then introducing the gas into the module after the gas inlet module can ensure the stability of the gas flow and the mixture, avoid uneven gas mixing and pressure fluctuations, and at the same time facilitate the calculation of the oxygen concentration parameter of the fusion gas, so as to improve the reliability of the experiment, achieve the purpose of controllable oxygen reduction, reduce the accumulation of harmful gases, thereby optimizing the pyrolysis process and improving the yield and quality of shale oil.

[0070] In some embodiments, refer to Figure 2 and Figure 3 , the embodiment of the present application also provides another simulation device for the yield of controllable oxygen reduction and oxidation pyrolysis of shale oil. This device is in Figure 1On this basis, it further includes a central container module 500. The central container module 500 includes a central container 5, a third control valve 6, a third gas flow controller 7, and a third flowmeter 8 that are sequentially installed in the gas passage between the output end of the central container 5 and the shale oil pyrolysis module 200. The input end of the central container 5 is connected to the output end of the gas intake module 100. The central container 5 is used to fuse air and inert gas and introduce the fused gas into the shale oil pyrolysis module 200. By adjusting the third control valve 6 and the third gas flow controller 7, the flow rate of the fused gas at the output end of the central container 5 is controlled. The third flowmeter 8 is used to monitor the flow rate of the fused gas at the output end of the central container 5.

[0071] Among them, a pressure sensor can be installed inside the central container 5 to detect the internal pressure of the central container 5, so as to determine the gas pressure introduced into the shale oil pyrolysis module 200.

[0072] Air and inert gas are fused through the central container 5 to obtain a fused gas, and the oxygen concentration of the gas flowing to the shale oil pyrolysis module 200 can be adjusted according to the flow rates of the introduced air and inert gas.

[0073] Exemplarily, the air flow rate is adjusted to 60 ml / min, the carbon dioxide flow rate is adjusted to 0 ml / min. After the air and carbon dioxide gas flows are both stable, the gas discharge valve is closed, and the two gases are simultaneously introduced into the intermediate container. At this time, the oxygen concentration of the fused gas in the intermediate container is 21%; or the air flow rate is adjusted to 40 ml / min, the carbon dioxide flow rate is adjusted to 20 ml / min. After the air and carbon dioxide gas flows are both stable, the gas discharge valve is closed, and the two gases are simultaneously introduced into the intermediate container. At this time, the oxygen concentration of the fused gas in the intermediate container is 14%; or the air flow rate is adjusted to 20 ml / min, the carbon dioxide flow rate is adjusted to 40 ml / min. After the air and carbon dioxide gas flows are both stable, the gas discharge valve is closed, and the two gases are simultaneously introduced into the intermediate container. At this time, the oxygen concentration of the fused gas in the intermediate container is 7%.

[0074] Using the central container module to introduce air and inert gas into the central container for mixing to form a fused gas with a certain oxygen concentration, then adjusting the fused gas source flow rate through the third control valve and the third gas flow controller, and using the third flowmeter to monitor the gas source flow rate, and then introducing it into the shale oil pyrolysis module can ensure uniform gas mixing, accurate composition ratio, and stable flow rate, improve the reliability of the experiment, and judge the optimal pyrolysis conditions by adjusting parameters such as oxygen concentration and fused gas source flow rate, so as to improve the yield and quality of shale oil.

[0075] In some embodiments, please refer to Figure 3 or Figure 4, the shale oil pyrolysis module includes an oxidative pyrolysis chamber 9, a heating controller 10, and a heat insulation layer 11 installed outside the oxidative pyrolysis chamber 9; the heating controller 10 is used to heat the oxidative pyrolysis chamber 9; the oxidative pyrolysis chamber 9 is used to receive gas and discharge pyrolysis products.

[0076] It should be noted that the oxidative pyrolysis chamber 9 is the main area for pyrolysis reactions. It is usually a sealed container used to heat the shale oil sample to a certain temperature to decompose the organic substances inside. The heating controller 10 is used to control the temperature of the oxidative pyrolysis chamber 9 to ensure that the pyrolysis process is carried out at the optimal temperature to maximize the yield and quality of the oil, such as setting the heating rate, the final pyrolysis temperature, and the constant temperature time. The heat insulation layer 11 is usually installed outside the oxidative pyrolysis chamber 9 to reduce heat loss and maintain a high-temperature environment inside the pyrolysis chamber.

[0077] Among them, in the shale oil pyrolysis module, the shale oil sample is placed in the oxidative pyrolysis chamber 9; the heating controller 10 is started to set and control the temperature of the oxidative pyrolysis chamber 9 to reach the required pyrolysis temperature; ensure that the heat insulation layer 11 of the oxidative pyrolysis chamber 9 works effectively to reduce heat loss and maintain a stable temperature inside the pyrolysis chamber; introduce gas (such as air, inert gas, or a mixed gas source) to enable the shale oil sample to undergo pyrolysis reactions under a controlled atmosphere; the pyrolysis products are discharged from the oxidative pyrolysis chamber 9 and enter the product collection module.

[0078] Through the various components of the shale oil pyrolysis module, the pyrolysis reactions of gas and shale oil can be effectively achieved while ensuring the safety and efficiency of the process.

[0079] In some embodiments, please refer to Figure 3 or Figure 4 , the product collection module includes an oil-water collection bottle 15, a condensation heat insulation cover 16, a condensation heat insulation layer 17, a condensation temperature controller 18, a condensation medium 19, and a fifth control valve 13 connected between the output end of the shale oil pyrolysis module and the input end of the oil-water collection bottle 15;

[0080] The body of the oil-water collection bottle 15 is embedded in the condensation heat insulation layer 17, and the condensation medium 19 is added to the condensation heat insulation layer 17;

[0081] The condensation heat insulation cover 16 is fixed on the top of the oil-water collection bottle 15 and the condensation heat insulation layer 17.

[0082] It should be noted that the oil-water collection bottle 15 is used to collect the mixture of oil and water generated during the pyrolysis process, so as to facilitate further separation to extract oil. The condensation heat preservation cover 16 is used to cover the condensation heat preservation layer 17 to reduce heat dissipation and maintain the temperature inside the condensation heat preservation layer 17. The condensation heat preservation layer 17 is used to promote the condensation of gas. The condensation temperature controller 18 is used to control the temperature of the condensation medium 19 to ensure that the gas can be effectively condensed into liquid. The condensation medium 19 is used to help condense the gas generated by pyrolysis into liquid, such as an ethylene glycol aqueous solution. Through condensation treatment, more products can be collected in liquid form, reducing losses and improving the collection and separation efficiency.

[0083] In some embodiments, the product collection module further includes a gas collection part 14 and a fourth control valve 12 connected between the output end of the shale oil pyrolysis module and the input end of the gas collection part 14.

[0084] Among them, the gaseous products generated during the pyrolysis process may contain light hydrocarbons and other valuable gas components. By introducing the gaseous products into the gas collection part 14 through the fourth control valve 12 for collection, these valuable gases can be effectively collected and preserved, avoiding their escape or waste, reducing pollution to the atmosphere. For example, the combustible gas or other useful components in the gaseous products can be used as energy or chemical raw materials to improve resource utilization rate. At the same time, if the gaseous products generated during the pyrolysis process are not discharged in time, it may cause the pressure in the system to rise, affecting the stability and safety of the pyrolysis reaction. By collecting the gaseous products through the gas collection part, the system pressure can be effectively controlled to ensure the safety and stability of the reaction process.

[0085] In some embodiments, please refer to Figure 3 or Figure 4 , the oil-water separation module includes an oil-water separator 20, a water collection part 21, and an oil collection part 22;

[0086] The oil-water separator 20 is used to separate the condensation products and discharge the aqueous phase products and oil phase products;

[0087] The water collection part 21 is used to collect the aqueous phase products;

[0088] The oil collection part 22 is used to collect the oil phase products.

[0089] Among them, the oil-water separator can utilize the physical property differences between oil and water to achieve the separation of oil and water, so as to calculate the product yield of this pyrolysis reaction by using the separated oil and water. By changing the gas oxygen concentration, multiple simulations are carried out to determine the optimal pyrolysis conditions.

[0090] In some embodiments, the oil-water separator 20 is an oil-water azeotropic separator.

[0091] Among them, at a specific temperature and pressure, the oil-water azeotropic separator forms an azeotrope from the oil-water mixture and then performs azeotropic distillation on it to separate the pure water phase and the pure oil phase. The oil-water azeotropic separator has the characteristic of high separation purity compared with other oil-water separators, which can improve the purity of the oil phase and the water phase, making the judgment of the product yield more accurate.

[0092] Through the coordinated work of each module, this device realizes the controllable oxygen-reducing oxidation pyrolysis of shale oil, collects and separates the pyrolysis products, can accurately control the gas source and determine the optimal pyrolysis conditions, ensures the efficiency and safety of the experiment, provides a scientific basis for the actual shale oil extraction and processing, and can improve the yield and purity of shale oil during actual extraction.

[0093] Therefore, during the application of this application, place the shale oil core in the oxidation pyrolysis chamber; evacuate the central container, then open the first control valve and the second control valve, adjust the first gas flow controller and the second gas flow controller, so that two gases, air and carbon dioxide, are introduced into the central container in a certain proportion, thereby adjusting the oxygen concentration to achieve the purpose of controllable oxygen reduction. Among them, the specific value of the oxygen concentration can be adjusted as needed, and different oxygen concentrations can be set for control experiments. After the pressure in the central container meets the preset pressure (such as reaching 3 MPa), open the third control valve, the fourth control valve, and the fifth control valve, and adjust the third gas flow controller to continuously and stably introduce the mixed gas into the oxidation pyrolysis chamber for a certain period of time (such as 15 min) to remove the remaining miscellaneous gases in the oxidation pyrolysis chamber; at the same time, turn on the condensation temperature controller and adjust the temperature value to the preset temperature (such as -20 °C); turn on the heating controller, set the heating rate, the final pyrolysis temperature, and the constant temperature time (for example: set the heating rate to 5 °C / min, the constant temperature time to 4 h, and the final pyrolysis temperatures are set to 300 °C, 350 °C, 400 °C, 450 °C, 500 °C, 550 °C, 600 °C respectively, that is, under the condition that the other conditions are the same, compare the influence of the final pyrolysis temperature on the shale oil yield); after the pyrolysis reaction ends, use the oil-water azeotropic separator to separate and purify the oil phase and the water phase; calculate the yields of various products and evaluate the oxidation pyrolysis effect.

[0094] Among them, the product yield calculation formula is as follows:

[0095]

[0096] Y g = 1 - (Y o + Y w + Y s );

[0097] Among them, Y O is the yield of pyrolysis oil, %; Y W is the yield of water, %; Y Sis the yield of shale semicoke, %; Y g is the yield of pyrolysis gas, %; M r is the mass of the oil shale sample used for pyrolysis, g; M l is the mass of the liquid product of pyrolysis, g; M s is the mass of the pyrolysis residue, g; V w is the volume of the pyrolysis water, cm 3 ; ρ is the water density at 298K and 0.1MPa, g / cm 3 .

[0098] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0099] It should be noted that the "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification refer to embodiments that may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0100] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in the sense of singularity, or can be used to describe a combination of features, structures or characteristics in the sense of plurality. Similarly, at least in part according to the context, terms such as "a" can also be understood as conveying singular usage or conveying plural usage.

[0101] It should be easily understood that the phrases "fixed on...", "on...", or "after..." in this disclosure should be interpreted in the broadest way, so that "fixed on..." not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "on..." or "fixed on..." not only includes the meaning of "above something" or "on top of", but also can include the meaning of "above something" or "on top of" without intermediate features or layers therebetween (i.e., directly on something). "After..." not only means "directly behind something", but also includes the meaning of "behind something" with respect to spatial distance and having intermediate features or layers therebetween.

[0102] In addition, for ease of description, spatial relative terms may be used in this document, such as "inside", "upper", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figure. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptors used in this document may be interpreted accordingly as well.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A simulation device for the yield of shale oil by controlled oxygen-reduced oxidation pyrolysis, characterized in that, It includes a gas inlet module, a shale oil pyrolysis module, a product collection module, and an oil-water separation module; the gas inlet module is connected to the shale oil pyrolysis module; the shale oil pyrolysis module is connected to the product collection module; the product collection module is connected to the oil-water separation module; The gas inlet module is used to introduce gas into the shale oil pyrolysis module; The shale oil pyrolysis module is used to receive the gas and discharge pyrolysis products; The product collection module is used to collect the pyrolysis products and discharge condensed products; The oil-water separation module is used to separate the condensed products and discharge aqueous phase products and oil phase products.

2. The device according to claim 1, characterized in that The gas inlet module includes an air gas cylinder (1), a first control valve (2), a first gas flow controller (3), and a first flowmeter (4) sequentially installed in the gas channel between the output end of the air gas cylinder (1) and the shale oil pyrolysis module; By adjusting the first control valve (2) and the first gas flow controller (3), the air flow at the output end of the air gas cylinder (1) is controlled; The first flowmeter (4) is used to monitor the air flow at the output end of the air gas cylinder (1).

3. The device according to claim 2, characterized in that The gas inlet module further includes an inert gas cylinder (26), a second control valve (25), a second gas flow controller (24), and a second flowmeter (23) sequentially installed in the gas channel between the output end of the inert gas cylinder (26) and the shale oil pyrolysis module; By adjusting the second control valve (25) and the second gas flow controller (24), the inert gas flow at the output end of the inert gas cylinder (26) is controlled; The second flowmeter (23) is used to monitor the inert gas flow at the output end of the inert gas cylinder (26).

4. The device according to claim 3, characterized in that, The gas inlet module further includes a gas discharge port and a gas discharge valve for controlling the opening and closing of the gas discharge port; the gas discharge port and the gas discharge valve are fixed on the gas channel after the first flowmeter (4) and the second flowmeter (23); When adjusting the first control valve (2) and the first gas flow controller (3), open the gas discharge valve, discharge air through the gas discharge port, and close the gas discharge valve until the air flow monitored by the first flowmeter (4) is stable, then introduce air into the shale oil pyrolysis module; When adjusting the second control valve (25) and the first gas flow controller (3), open the gas discharge valve, discharge inert gas through the gas discharge port, and close the gas discharge valve until the inert gas flow monitored by the second flowmeter (23) is stable, then introduce inert gas into the shale oil pyrolysis module.

5. The device according to claim 1, characterized in that, The device further includes a central container module, which includes a central container (5), a third control valve (6), a third gas flow controller (7), and a third flowmeter (8) sequentially installed in the gas channel between the output end of the central container (5) and the shale oil pyrolysis module; the input end of the central container (5) is connected to the output end of the gas inlet module; The central container (5) is used to mix air and inert gas and supply the mixed gas to the pyrolysis module for shale oil; By adjusting the third control valve (6) and the third gas flow controller (7), the flow rate of the mixed gas at the output end of the central container (5) is controlled; The third flowmeter (8) is used to monitor the flow rate of the mixed gas at the output end of the central container (5).

6. The device according to claim 1, characterized in that, The pyrolysis module for shale oil includes an oxidative pyrolysis chamber (9), a heating controller (10), and a heat insulation layer (11) installed outside the oxidative pyrolysis chamber (9); The heating controller (10) is used to heat the oxidative pyrolysis chamber (9); The oxidative pyrolysis chamber (9) is used to receive the gas and discharge the pyrolysis products.

7. The device according to claim 1, characterized in that, The product collection module includes an oil-water collection bottle (15), a condensation heat insulation cover (16), a condensation heat insulation layer (17), a condensation temperature controller (18), a condensation medium (19), and a fifth control valve (13) connected between the output end of the pyrolysis module for shale oil and the input end of the oil-water collection bottle (15); The body of the oil-water collection bottle (15) is embedded in the condensation heat insulation layer (17), and the condensation medium (19) is added to the condensation heat insulation layer (17); The condensation heat insulation cover (16) is fixed to the tops of the oil-water collection bottle (15) and the condensation heat insulation layer (17).

8. The device according to claim 7, characterized in that, The product collection module further includes a gas collection part (14) and a fourth control valve (12) connected between the output end of the pyrolysis module for shale oil and the input end of the gas collection part (14).

9. The device according to claim 1, wherein The oil-water separation module includes an oil-water separator (20), a water collection part (21), and an oil collection part (22); The oil-water separator (20) is used to separate the condensation products and discharge the aqueous phase products and the oil phase products; The water collection part (21) is used to collect the aqueous phase products; The oil collection part (22) is used to collect the oil phase products.

10. The device according to claim 9, characterized in that The oil-water separator (20) is an azeotropic oil-water separator.

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