A kerogen preparation instrument

Abstract

The present invention provides a kerogen preparation instrument for preparing kerogen in rocks. It mainly solves the problems of existing instruments being easily corroded, having high maintenance costs, and cumbersome operations. The kerogen preparation instrument includes a permanent magnet synchronous rotation stirring system, a reagent supply and discharge system, and a hydrothermal circulation system; the permanent magnet synchronous rotation stirring system is connected to the hydrothermal circulation system and the reagent supply and discharge system; the permanent magnet synchronous rotation stirring system transfers heat-conducting liquid through the hydrothermal circulation system; reagents are provided through the reagent supply and discharge system; the permanent magnet synchronous rotation stirring system includes a permanent magnet reaction cup and a rotating magnetic coil; a number of rotating magnetic coils are circumferentially installed outside the permanent magnet reaction cup. The kerogen preparation instrument avoids corrosion of the instrument by means of physical isolation, stirs kerogen with a synchronously rotatable permanent magnet reaction cup, provides the required temperature for chemical reactions in the form of hydrothermal circulation, and realizes quantitative transfer of reagents by combining a vacuum generator and a measuring cup, with low maintenance costs and simple operation.

Description

Technical Field

[0001] The present invention relates to the field of petroleum geology or oil and gas geochemical experimental analysis, and particularly relates to a kerogen preparation instrument for separating kerogen from rocks. Background Art

[0002] Kerogen is the dispersed organic matter insoluble in alkali, non-oxidizing acid, and non-polar organic solvents in sedimentary rocks. Preparing kerogen from rocks is the basis for its subsequent analysis.

[0003] Due to the strong toxicity of concentrated hydrochloric acid and concentrated hydrofluoric acid used for separating kerogen from rocks, research on kerogen preparation equipment has been carried out at home and abroad. For example, in the 1980s, VINCI in France began to produce kerogen preparation instruments. This instrument uses peristaltic pumps to automatically add and discharge reagents and uses nitrogen to stir samples; Changsha Xiangzhi Centrifuge Instrument Co., Ltd. publicly disclosed an intelligent kerogen extraction instrument in 2010. The instrument uses equipment such as computer control valve groups, peristaltic pumps, and mixers to achieve automatic preparation of kerogen; Sichuan Keyuan Engineering Technology Testing Center in 2015 used a rotating mechanism to drive a magnetic stirrer to stir the heated samples, improving the problem of uneven stirring during the separation process; CNOOC in 2017 achieved automatic analysis of kerogen through a T-shaped stirring paddle, solenoid valves, liquid addition pumps, flow meters, etc.; Kunshan Herunhua Electronic Technology Co., Ltd. in 2020 achieved the extraction of kerogen through a stirring motor and a liftable heating tank; Chengdu Core Technology Co., Ltd. in 2021 used the gas pulse method to regularly release nitrogen into the reaction vessel to stir the samples, etc.

[0004] Although research on kerogen preparation equipment has been carried out at home and abroad, the existing kerogen preparation instruments and methods at home and abroad are not yet mature enough to be widely popularized and applied in scientific research and production. Therefore, manual operation and semi-automatic operation methods are still mainly used for kerogen preparation at home and abroad.

[0005] The main problems in the existing methods of preparing kerogen by instruments at home and abroad are as follows: ① Hydrochloric acid and hydrofluoric acid are highly corrosive. Mechanical and electronic components such as peristaltic pumps, solenoid valves, (stirring) motors, heating plates, and lifting tables commonly used in existing instruments are extremely vulnerable to corrosion once acidic reagents / acidic gases leak or the seals are not tight. The instrument failure rate is very high and safety accidents are likely to occur due to this; ② Existing instruments generally use a large number of solenoid valve groups and peristaltic pump-based reagent supply and discharge systems, which have a relatively complex structure. Once damaged, their maintenance difficulty and cost are relatively high; ③ In order to control acidic gases, existing instruments generally process samples in a closed environment, making operations such as installing / placing samples during the sample preparation process rather cumbersome, and leakage accidents are likely to occur after the aging of the closed components, affecting the use experience of the instrument. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the problems in the background technology that existing instruments are prone to corrosion, have high maintenance costs, and are cumbersome to operate, and to provide a kerogen preparation instrument. The kerogen preparation instrument avoids corrosion of the instrument through physical isolation, stirs the kerogen with a permanently magnetized reaction cup that can rotate synchronously, provides the required temperature for chemical reactions in the form of hot liquid circulation, and realizes quantitative reagent transfer by combining a vacuum generator and a measuring cup, with low maintenance costs and simple operation.

[0007] The present invention can achieve the solution to its problems through the following technical solutions:

[0008] A kerogen preparation instrument, comprising a permanent magnet synchronous rotation stirring system, a reagent supply and discharge system, and a hot liquid circulation system; the permanent magnet synchronous rotation stirring system is connected to the hot liquid circulation system and the reagent supply and discharge system; the permanent magnet synchronous rotation stirring system transfers heat-conducting liquid through the hot liquid circulation system; and provides reagents through the reagent supply and discharge system;

[0009] The permanent magnet synchronous rotation stirring system includes a permanently magnetized reaction cup and a rotating magnetic coil; a plurality of rotating magnetic coils are circumferentially installed outside the permanently magnetized reaction cup.

[0010] Preferably, the permanently magnetized reaction cup is an annular cup for containing samples and acid reagents; a plurality of sector-shaped permanent magnets are spaced apart on the inner wall of the permanently magnetized reaction cup, and the N pole or S pole of the sector-shaped permanent magnets points vertically towards the inside of the permanently magnetized reaction cup, and the N poles and S poles of adjacent sector-shaped permanent magnets have opposite polarities; the rotating magnetic coil is composed of a coil winding and a magnetic core, the coil winding is wound around the magnetic core, a plurality of rotating magnetic coils are arranged around each permanently magnetized reaction cup, and the winding directions of the coil windings of adjacent rotating magnetic coils are opposite.

[0011] Preferably, the rotating magnetic coil is connected to a rotating magnetic field driving part, and the rotating magnetic field driving part is used to intermittently supply power to multiple groups of rotating magnetic coils alternately, so as to form a rotating magnetic field in multiple groups of rotating magnetic coils. The rotating magnetic field generated by the rotating magnetic coil and the magnetic field of the sector-shaped permanent magnets in the permanently magnetized reaction cup jointly drive the permanently magnetized reaction cup to rotate, realizing the stirring of the sample.

[0012] Preferably, the reagent supply and discharge system includes 4 reagent pools and 4 vacuum generators A - D; the 4 reagent pools are respectively a hydrochloric acid pool, a hydrofluoric acid pool, a deionized water pool, and a waste liquid pool;

[0013] Each reagent pool is respectively connected to the suction port of the vacuum generators A - D through a conduit and a measuring cup; the air inlet of the vacuum generators A - D is connected to a compressed gas control part through a compressed gas pipe; the air outlet of the vacuum generators A - D is connected to the corresponding reagent pool below;

[0014] The compressed air control unit is used to generate the compressed air required by vacuum generators A - D; the reagent supply and discharge system uses vacuum generators A - D and measuring cups to jointly achieve reagent supply and discharge through the compressed air control unit.

[0015] Preferably, the measuring cup is installed on the conduit. The measuring cup is a funnel - shaped container with a small hole at the bottom; the capacity of the measuring cup determines the amount of reagent added each time.

[0016] Preferably, the hot liquid circulation system includes a heat exchange tank; the liquid outlet pipe of the heat exchange tank is connected to the heating tank through a high - temperature circulation pump. The heating tank is internally provided with heating pipes and temperature probes, and the heat exchange tank is connected to the heating tank through a return pipe; several sample slots for placing permanent - magnet reaction cups are provided on the heat exchange tank. The sample slots are at a certain inclination angle, and several strip - shaped sealing cavities are arranged around the sample slots. The sealing cavities are distributed in a ring shape, and rotary magnetic coils are placed in the sealing cavities;

[0017] The high - temperature circulation pump is used to transport the heated heat - conducting liquid to the heat exchange tank; the heating pipes and temperature probes are connected to the circulating temperature control unit; the heating pipes, temperature probes and the circulating temperature control unit are used to heat the heat - conducting liquid to a set temperature.

[0018] Preferably, the heat exchange tank is also connected to a liquid replenishing tank through a return pipe; the inclination angle of the sample slot is 30 - 60︒;

[0019] The liquid replenishing tank is used to supplement the liquid lost during the operation of the hot liquid circulation system; the hot liquid circulation system uses the heating pipes, temperature probes, high - temperature circulation pump, heat exchange tank, circulating temperature control unit, and liquid replenishing tank to jointly complete the hot liquid circulation.

[0020] Preferably, there is an interference fit between the permanent - magnet reaction cup and the sample slot.

[0021] Preferably, the rotary magnetic field driving unit, the compressed air control unit, and the circulating temperature control unit together constitute the control unit; the control unit, the liquid replenishing tank, the high - temperature circulation pump, the heating pipes, and the temperature probes of the hot liquid circulation system are placed in an environment without reagents and corrosion, to avoid their corrosion.

[0022] Preferably, components such as the reagent pool, vacuum generators, measuring cups, conduits, compressed gas pipes, permanent - magnet reaction cups, and the housing are made of corrosion - resistant materials, and the corrosion - resistant materials are polytetrafluoroethylene and Monel alloy.

[0023] The present invention may have the following beneficial effects when compared with the above - mentioned background technology:

[0024] ① The present invention isolates the automatic control unit composed of vulnerable mechanical and electronic circuits in the equipment and the hot liquid circulation system (except the heat exchange tank), and places them separately in the reagent - free area, avoiding the corrosion problem of the automatic control unit by means of physical isolation;

[0025] ② The present invention uses a permanently magnetized reaction cup that can rotate synchronously to stir the kerogen. All vulnerable components are sealed in the device, and no complex disassembly or installation is required during use, avoiding the problem that the motor, lifting platform, or other stirring components are easily damaged due to seal failure in an acidic environment, and the operation is more convenient;

[0026] ③ The present invention uses a hydrothermal circulation heating method to provide the required temperature for the chemical reaction. The heat exchange box is a closed box, which completely isolates the acidic reagents or gases used in the experiment from the heating components, avoiding the problem that the heating module is easily damaged in an acidic environment;

[0027] ④ The present invention uses a combination of a vacuum generator and a measuring cup to achieve quantitative reagent transfer. The vacuum generator and the measuring cup have excellent corrosion resistance and long service life, avoiding the problem that electronic devices such as solenoid valve groups, peristaltic pumps, and flow meters are easily damaged when directly operating strong acidic reagents. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the kerogen preparation instrument of the present invention;

[0029] Figure 2 is an assembled schematic diagram of the permanently magnetized reaction cup and the rotating magnetic coil of the present invention;

[0030] Figure 3 is a schematic structural diagram of the vacuum generator of the present invention.

[0031] In the figure: 1: hydrochloric acid pool; 2: hydrofluoric acid pool; 3: deionized water pool; 4: waste liquid pool; 5: heat exchange box; 6: permanently magnetized reaction cup; 6-1: sector permanent magnet; 7: drain pipe; 8: rotating magnetic coil; 9: liquid replenishing tank; 10: temperature probe; 11: high-temperature circulation pump; 12: heating pipe; 13: measuring cup; 14: vacuum generator A; 15: conduit; 16: vacuum generator B; 17: vacuum generator C; 18: vacuum generator D; 19: compressed gas pipe, 20: controller; 21: suction port, 22: air inlet; 23: air outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. There may be more than one name for various components used in the present invention, and other components with the same or similar functions are not excluded. All other embodiments obtained by those of ordinary skill in the art based on the description of the present invention and its embodiments without creative efforts shall fall within the scope of protection of the present invention.

[0033] As Figures 1-3As shown in the figure, a kerogen preparation instrument is composed of a permanent magnet synchronous rotation stirring system, a reagent supply and discharge system, and a hydrothermal circulation system. The permanent magnet synchronous rotation stirring system, the reagent supply and discharge system, and the hydrothermal circulation system are respectively connected to a controller 20, and the controller 20 includes a rotating magnetic field driving part, a compressed air control part, and a circulating temperature control part.

[0034] The hydrothermal circulation system includes a heat exchange tank 5 and a liquid replenishing tank 9; the liquid outlet pipe of the heat exchange tank 5 is connected to a heating tank through a high-temperature circulating pump 11. The heating tank is internally provided with a heating pipe 12 and a temperature probe 10. The heat exchange tank 5 is respectively connected to the liquid replenishing tank 9 and the heating tank through a return liquid pipe.

[0035] The heat exchange tank 5 is provided with a number of sample slots for placing permanent magnet reaction cups 6. The sample slots are at a certain inclination angle, and the inclination angle of the sample slots is 30 - 60°; and a number of strip-shaped sealing cavities are arranged around the sample slots. The sealing cavities are annularly distributed, and a rotating magnetic coil 8 is placed in the sealing cavities; the heating pipe 12 and the temperature probe 10 are connected to the circulating temperature control part; the heating pipe 12, the temperature probe 10 and the circulating temperature control part are used to heat the heat-conducting liquid to a set temperature; the high-temperature circulating pump 11 is used to transport the heated heat-conducting liquid into the heat exchange tank 5.

[0036] The reagent supply and discharge system includes a reagent pool, vacuum generators A - D (14, 16, 17, 18), and a compressed air control part; the reagent pool includes a hydrochloric acid pool 1, a hydrofluoric acid pool 2, a deionized water pool 3, and a waste liquid pool 4; the hydrochloric acid pool 1, the hydrofluoric acid pool 2, the deionized water pool 3, and the waste liquid pool 4 are respectively connected to the suction ports 21 of the vacuum generators A - D (14, 16, 17, 18) through conduits and measuring cups 13; the air inlet ports 22 of the vacuum generators A - D (14, 16, 17, 18) are connected to the compressed air control part through compressed gas pipes 19; the air outlet ports 23 of the vacuum generators A - D (14, 16, 17, 18) are connected into the corresponding lower reagent pools (1 - 4); the measuring cup 13 is a funnel-shaped container installed on the conduit 15, and a small hole is opened at the bottom of the measuring cup 13.

[0037] The compressed air control part is used to generate the compressed gas required by the vacuum generators A - D (14, 16, 17, 18). During operation, the compressed gas generated by the compressed air control part is transported to the vacuum generators A - D (14, 16, 17, 18) through the compressed gas pipe 19. The reagents sucked by the vacuum generators through the conduit 15 sequentially fill the flowing-through measuring cups 13, and the excess reagents in the conduit 15 return to the reagent pool through the exhaust pipes of the vacuum generators; after the compressed air control part stops supplying gas, the reagents filled in the measuring cup 13 flow into the permanent magnet reaction cup 6 through the small hole at the bottom of the measuring cup 13.

[0038] The permanent magnet synchronous rotation stirring system includes a permanent magnet reaction cup 6, a rotating magnetic coil 8, and a rotating magnetic field driving part.

[0039] The rotating magnetic coil 8 is placed in the sealed cavity on the heat exchange box 5; the rotating magnetic coil 8 is composed of a coil winding and a magnetic core, the coil winding is wound around the magnetic core, several rotating magnetic coils 8 are arranged around each sample, and the winding directions of the coil windings of adjacent rotating magnetic coils 8 are opposite; the permanent magnet reaction cup 6 is placed in the sample groove on the heat exchange box 5, and there is a clearance fit between the permanent magnet reaction cup 6 and the sample groove; the permanent magnet reaction cup 6 is made of acid-resistant material, the permanent magnet reaction cup 6 is an annular cup, and several sector permanent magnets 6-1 are arranged at intervals on the inner wall of the permanent magnet reaction cup 6, the N pole or S pole of the sector permanent magnet 6-1 points vertically to the inside of the permanent magnet reaction cup 6, and the polarities of the N / S poles of adjacent sector permanent magnets 6-1 are opposite; the permanent magnet reaction cup 6 can rotate in the rotating magnetic field generated by the rotating magnetic coil 8; the rotating magnetic coil 8 is connected to the rotating magnetic field driving part of the controller 20, the magnetic field polarities generated by adjacent rotating magnetic coils 8 are opposite within the same period of time, and the rotating magnetic field generated by the rotating magnetic coil 8 and the magnetic field of the sector permanent magnet 6-2 in the permanent magnet reaction cup 6 jointly drive the permanent magnet reaction cup 6 to rotate; after the permanent magnet reaction cup 6 placed in the sample groove at a certain inclination angle rotates, the sample in the permanent magnet reaction cup 6 continuously slides to the bottom of the cup under the action of gravity, playing the role of "stirring the sample", thereby accelerating the sample reaction.

[0040] The rotating magnetic field driving part is used to supply power to multiple groups of rotating magnetic coils 8 intermittently and alternately, form a rotating magnetic field in the multiple groups of rotating magnetic coils 8, and drive the permanent magnet reaction cup 6 to rotate.

[0041] The above-mentioned rotating magnetic field driving part, compressed air control part, and circulating temperature control part together constitute the controller; the control part and the hot liquid circulation system (except the heat exchange box) need to be placed separately in a non-corrosive environment to avoid being corroded.

[0042] The working process of this kerogen preparation instrument is as follows:

[0043] When using the kerogen preparation instrument, it is necessary to first replenish the reagents or liquids in the replenishing liquid tank 9, hydrochloric acid tank 1, hydrofluoric acid tank 2, and deionized water tank 3, empty the waste liquid in the waste liquid tank 4, and then put the crushed rock sample into the permanent magnet reaction cup 6, and set the operating parameters such as heating temperature, reagent addition amount, stirring frequency, and stirring speed on the controller 20.

[0044] After the instrument is started, the heating tube 12 is heated by the circulating temperature control unit to heat the heat-conducting liquid to the set temperature, and the heated heat-conducting liquid is transported into the heat exchange tank 5 by the high-temperature circulating pump 11. The heat-conducting liquid in the heat exchange tank 5 returns to the heating tube 12 through the return pipe to be heated up again, and so on. When the heat-conducting liquid in the heat liquid circulation system is lost, the liquid replenishing tank 9 is used to replenish the liquid lost during the operation of the heat liquid circulation system, and the heat-conducting liquid in the liquid replenishing tank 9 can be automatically replenished into the heat liquid circulation system through the return pipe. Each component in the permanent magnet synchronous rotation stirring system, the reagent supply and discharge system, and the heat liquid circulation system is made of corrosion-resistant materials, and the corrosion-resistant materials are polytetrafluoroethylene and Monel alloy.

[0045] Taking the action of adding hydrochloric acid reagent as an example, when the kerogen preparation instrument is working, the compressed air control unit of the controller 20 transports compressed air to the vacuum generator B16, and the vacuum generator B16 extracts the hydrochloric acid reagent in the hydrochloric acid pool 1 through the conduit 15. The hydrochloric acid reagent fills each measuring cup 13 along the conduit 15 in turn, and the excess hydrochloric acid reagent in the conduit 15 flows back to the hydrochloric acid pool 1 through the air outlet 23 of the vacuum generator B16. After the compressed air control unit stops transporting compressed air, the hydrochloric acid in the measuring cup 13 flows through the small hole at the bottom of the measuring cup 13 into the corresponding permanent magnet reaction cup 6 at the lower part of the measuring cup 13. During this process, the capacity of the measuring cup 13 represents the dosage of the reagent added each time. If more reagents need to be added, this process can be cycled multiple times or a measuring cup 13 with a larger capacity can be replaced in advance. The total amount of the reagent added in the permanent magnet reaction cup 6 is equal to the product of the capacity of the measuring cup 13 and the number of cycles.

[0046] The rotating magnetic field driving unit drives the rotating magnetic coil 8 to generate a rotating magnetic field, and the rotating magnetic field and the sector permanent magnet 6-1 in the permanent magnet reaction cup 6 act together to drive the permanent magnet reaction cup 6 to rotate intermittently in a cycle. After the permanent magnet reaction cup 6 with a certain inclination angle (30-60°) rotates, the sample in the permanent magnet reaction cup 6 slides to the bottom of the cup continuously under the action of gravity, playing the role of "stirring the sample".

[0047] After the reaction is completed, the compressed air control unit of the controller 20 transports compressed air to the vacuum generator A14, and the vacuum generator A14 extracts the acid-containing waste liquid after the reaction in the permanent magnet reaction cup 6 into the waste liquid pool 4 through the conduit.

[0048] Similarly, deionized water can be transported into the permanent magnet reaction cup 6 multiple times by the vacuum generator D18 to dilute the acid-containing waste liquid, and the diluted waste liquid is discharged through the vacuum generator A14.

[0049] The addition of hydrofluoric acid reagent is similar to that of hydrochloric acid. The vacuum generator C17 extracts the hydrofluoric acid reagent in the hydrofluoric acid pool 2 through a conduit. The hydrofluoric acid reagent fills each measuring cup in sequence along the conduit, and the excess hydrofluoric acid reagent in the conduit flows back into the hydrofluoric acid pool 2 through the air outlet 23 of the vacuum generator C17. After the compressed air control unit stops delivering compressed air, the hydrofluoric acid in the measuring cup flows through the small holes at the bottom of the measuring cup into the corresponding permanent magnet reaction cup 6 in the lower part of the measuring cup.

[0050] Through the permanent magnet synchronous rotation stirring system, the sample in the permanent magnet reaction cup 6 continuously slides to the bottom of the cup under the action of gravity, playing the role of "stirring the sample".

[0051] After the reaction is completed, the vacuum generator A14 extracts the acid-containing waste liquid after the reaction in the permanent magnet reaction cup 6 into the waste liquid pool 4 through a conduit.

[0052] By circulating in this way, the experimental process of preparing kerogen from rock can be completed.

[0053] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments. It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A kerogen preparation instrument, characterized in that: It includes a permanent magnet synchronous rotating stirring system, a reagent supply and discharge system, and a hot liquid circulation system; the permanent magnet synchronous rotating stirring system is connected to the hot liquid circulation system and the reagent supply and discharge system; the permanent magnet synchronous rotating stirring system transfers heat transfer fluid through the hot liquid circulation system; and provides reagents through the reagent supply and discharge system; The permanent magnet synchronous rotating stirring system comprises a permanent magnet reaction cup (6) and a gyromagnetic coil (8); a plurality of gyromagnetic coils (8) are arranged on the outer circumference of the permanent magnet reaction cup (6); The permanent magnetic reaction cup (6) is an annular cup for containing samples and acid reagents; a plurality of sector-shaped permanent magnets are arranged at intervals on the inner wall of the permanent magnetic reaction cup, the N poles or S poles of the sector-shaped permanent magnets point vertically to the inside of the permanent magnetic reaction cup, and the N poles and S poles of adjacent sector-shaped permanent magnets have opposite polarities; The reagent supply and exhaust system includes 4 reagent pools and 4 vacuum generators AD (14, 16, 17, 18); the 4 reagent pools are a hydrochloric acid pool, a hydrofluoric acid pool, a deionized water pool, and a waste liquid pool; Each reagent pool is connected to the air intake port of the vacuum generator AD (14, 16, 17, 18) through a conduit and a measuring cup (13); the air inlet of the vacuum generator AD (14, 16, 17, 18) is connected to the compressed gas control unit through a compressed gas pipe (19); the air outlet of the vacuum generator AD (14, 16, 17, 18) is connected to the corresponding reagent pool at the bottom; the compressed gas generated by the compressed gas control unit is transported to the vacuum generator AD (14, 16, 17, 18) through the compressed gas pipe (19), and the reagent sucked by the vacuum generator through the conduit (15) fills the measuring cup (13) flowing through in turn, and the excess reagent in the conduit (15) is returned to the reagent pool through the exhaust pipe of the vacuum generator; The hot liquid circulation system comprises a heat exchange box (5); the liquid outlet pipe of the heat exchange box (5) is connected to the heating box via a high-temperature circulation pump (11); the heating box has a built-in heating pipe (12) and a temperature probe (10); the heat exchange box (5) is connected to the heating box via a liquid return pipe; and / or, The heat exchange box is provided with a plurality of sample slots for placing permanent magnetic reaction cups (6), the sample slots are inclined at a certain angle, and a plurality of strip-shaped sealed cavities are arranged around the sample slots, the sealed cavities are distributed in an annular shape, and a gyromagnetic coil (8) is placed in the sealed cavities.

2. The kerogen preparation apparatus according to claim 1, characterized in that: The gyromagnetic coil (8) consists of a coil winding and a magnetic core, the coil winding is wound on the magnetic core, a plurality of gyromagnetic coils are arranged around each permanent magnetic reaction cup, and the coil windings of adjacent gyromagnetic coils are wound in opposite directions.

3. The kerogen preparation apparatus according to claim 2, wherein: The gyromagnetic coil (8) is connected to a rotating magnetic field driving unit; the rotating magnetic field driving unit is used to intermittently and alternately supply power to the multiple groups of gyromagnetic coils, so that a rotating magnetic field is formed in the multiple groups of gyromagnetic coils. The rotating magnetic field generated by the gyromagnetic coils and the magnetic field of the fan-shaped permanent magnet in the permanent magnetic reaction cup jointly drive the permanent magnetic reaction cup to rotate, thereby achieving stirring of the sample.

4. The kerogen preparation apparatus according to claim 1, wherein: The reagent supply and discharge system comprises: The compressed gas control unit is used to generate the compressed gas required by the vacuum generator AD (14, 16, 17, 18); The reagent supply and discharge system uses vacuum generators A - D (14, 16, 17, 18) and measuring cups (13) to jointly achieve reagent supply and discharge through the compressed air control unit.

5. The kerogen preparation apparatus according to claim 4, characterized in that: The measuring cup (13) is installed on the conduit (15). The measuring cup is a funnel-shaped container with a small hole at the bottom. The capacity of the measuring cup determines the amount of reagent added each time.

6. The kerogen preparation apparatus according to claim 1, wherein: The high-temperature circulation pump is used to transport the heated heat-conducting liquid to the heat exchange tank. The heating pipe and temperature probe are connected to the circulating temperature control unit. The heating pipe, temperature probe, and circulating temperature control unit are used to heat the heat-conducting liquid to the set temperature.

7. The kerogen preparation apparatus according to claim 1, wherein: The heat exchange tank (5) is also connected to the liquid replenishing tank (9) through a return pipe. The liquid replenishing tank is used to supplement the liquid lost during the operation of the hot liquid circulation system.

8. The kerogen preparation apparatus according to claim 1, characterized in that: Including: There is a clearance fit between the permanent magnet reaction cup (6) and the sample tank. The inclination angle of the sample tank is 30 - 60°.

9. The kerogen preparation apparatus according to any one of claims 1-7, characterized in that: The rotating magnetic field drive unit, compressed air control unit, and circulating temperature control unit jointly constitute the control unit (20); And / or, The control unit, the liquid replenishing tank of the hot liquid circulation system, the high-temperature circulation pump, the heating pipe, and the temperature probe are placed in the reagent-free area.

10. The kerogen preparation instrument according to any one of claims 1-8, characterized in that: The reagent pool, vacuum generators A - D, measuring cups, conduits, compressed gas pipes, and permanent magnet reaction cups are made of corrosion-resistant materials, and the corrosion-resistant materials are polytetrafluoroethylene and Monel alloy.

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