Device and method for automatically extracting solid insoluble organic matters in sedimentary rock

Abstract

The invention discloses an automatic extraction device for solid insoluble organic matters in sedimentary rocks, which is characterized in that a sample sealing treatment system is arranged, and a sealing box is used for isolating acid gas generated in the extraction process of the solid insoluble organic matters, so that the pollution to the surrounding environment is avoided, and the health of experimenters is not influenced; the sample circulating tray system is arranged, a sample tray is driven by a motor to rotate in a stepping mode so as to be automatically in butt joint with the power liquid changing system, during liquid feeding, a liquid feeding assembly can be in butt joint with different sample cups in sequence, and liquid is injected into the sample cups; the liquid discharging assembly can be in butt joint with different sample cups in sequence and discharge liquid in the sample cups; by arranging the PLC automatic control unit, automation of the solid insoluble organic matter extraction process can be achieved, manual participation is not needed in the whole process or manual participation can be greatly reduced, all the process steps are strictly executed according to the set standard, and efficiency can be improved. The invention further discloses a method for automatically extracting the solid insoluble organic matter in the sedimentary rock.

Description

Technical Field

[0001] The present invention relates to an automatic extraction device and method for solid insoluble organic matter in sedimentary rocks, belonging to the technical fields of sedimentology, petroleum geology, organic geochemistry, etc. Background Art

[0002] Under the guidance of the petroleum organic origin theory, during the degradation process of organic matter, it is first transformed into kerogen, and then into hydrocarbons when buried to a certain depth and under certain temperature and pressure conditions. The characteristics of the hydrocarbon-generating parent material determine the hydrocarbon-generating potential and direction of the source rock, and it is one of the key evaluation indicators. Therefore, identifying the hydrocarbon-generating parent material of the source rock is an important research direction that the petroleum geology community has been working on for a long time. Thus, the most intuitive and convenient research method - the kerogen organic maceral method - has been derived from the comprehensive research methods of organic geochemistry and paleontology. Kerogen refers to the large-particle dispersed organic matter in sedimentary rocks that is insoluble in alkalis, non-oxidizing acids, and non-polar organic solvents. It can best carry the biological attributes of the original biological parent material, so it is one of the most intuitive evidences for identifying the original biological parent material. Due to its macromolecular characteristics, it is difficult to transfer with the movement of geological fluids, so it can best represent the sedimentary information of its original production horizon. At the same time, it also carries important sedimentary information according to its biological characteristics and morphological characteristics, so it is also an important indicator for restoring the sedimentary environment. Different biological parent materials are classified into different kerogen components according to their hydrocarbon-generating potential characteristics, and then the hydrocarbon-generating potential and direction of the source rock are accurately evaluated by quantitatively counting the contents of different kerogen components.

[0003] The working principle of the kerogen analysis platform is to use chemical and physical methods to remove inorganic minerals and chloroform-soluble organic matter in sedimentary rocks, so as to enrich other organic matter. The platform mainly consists of three parts: kerogen separation and extraction, polarized fluorescence integrated microscope, and microscopic coal petrology analysis system. ① Kerogen separation and extraction: The hydrocarbon source rock sample is first treated with hydrochloric acid to remove carbonates, hydrofluoric acid to remove silicates, and then hydrochloric acid to remove the newly formed fluorides; then, heavy liquids or chloroform are used to wash away heavy minerals mainly composed of pyrite; finally, chloroform is used to remove the remaining soluble organic matter, so as to enrich the kerogen in the rock sample. ② Polarized fluorescence integrated microscope: This instrument system is equipped with a polarized rotating stage, and has transmitted light, reflected light, and fluorescence illumination at the same time and can be switched for use. It can observe the organic microscopic composition of kerogen, accurately judge and quantify the hydrocarbon-generating components of low-mature to mature source rocks, so as to understand their biological sources, and provide clear fossil photos of various components of kerogen, sporopollen, and microplanktonic algae. Among them, the transmitted light is mainly used to identify the light-transmitting color, morphology, and structure of kerogen; the reflected light is mainly used to identify the reflected light color, morphology, structure, and protrusion of kerogen; the fluorescence is mainly used to identify the fluorescence emitted by kerogen under the excitation of near-ultraviolet light. Finally, the percentage content of each microscopic component is quantitatively counted, and the type index (TI) is calculated according to the different weighting coefficients of each microscopic component, so as to divide kerogen into three categories and four types (types I, II, III, and IV) to determine the type of organic matter. ③ Microscopic coal petrology analysis system (microphotometer): This instrument system is equipped with special reflectance measurement software, which measures the percentage value of the reflected light intensity to the perpendicular incident light intensity of the vitrinite of kerogen at a wavelength of (546±5) nm (green light), and obtains parameters such as the average reflectance, standard deviation, number of measurement points, and distribution range. The measured reflectance data is statistically analyzed in real time, and the reflectance distribution map is automatically drawn in real time. According to the finally measured reflectance distribution map, data such as the proportion of different vitrinite reflectances, their average values, and standard deviations can be obtained.

[0004] At present, the later testing technical methods of the kerogen analysis research platform are relatively perfect, but there are still many defects and potential safety hazards in the process of separating and extracting organic matter in the early stage, which are mainly reflected in three aspects: (1)At present, the separation and extraction of kerogen still adopt manual and semi-mechanized operation methods. Adding acid, stirring, heating, and discharging acid are all manual operations, with high labor intensity and large workload. At the same time, the instability of manual operation is likely to cause sample loss; and the long experimental period greatly restricts the progress of subsequent experiments. The reaction time basically accounts for two-thirds of the analysis process, increasing the experimental cost.

[0005] (2) During the operation process, there is a large amount of contact with toxic and harmful reagents, which causes certain harm to the health of experimental personnel; volatile hydrochloric acid and hydrofluoric acid are extremely easy to be inhaled into the body by experimental personnel; metal equipment such as centrifuges and water baths in the laboratory is extremely easy to be corroded, causing potential safety hazards; acid liquid pre-condensed and dripped easily occurs in the fume hood; (3) During the experimental operations of adding acid, stirring and discharging acid, volatile hydrochloric acid and hydrofluoric acid often come into direct contact with the air, directly polluting the ambient air and extremely easily causing environmental pollution. Therefore, in view of the above existing problems, it is urgent to optimize and improve the kerogen analysis platform, so as to improve the separation and extraction efficiency of kerogen, save time, labor and capital costs, and reduce potential safety hazards and environmental pollution. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an automatic extraction device and method for solid insoluble organic matter in sedimentary rocks, which can automatically realize various processes in the extraction operation of solid insoluble organic matter, reduce manual operation and improve efficiency.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: The present invention first proposes an automatic extraction device for solid insoluble organic matter in sedimentary rocks, including a sample sealing and treatment system, a sample circulation tray system, a power liquid changing system and a PLC automatic control unit; The sample sealing and treatment system includes a sealing box body made of acid-resistant materials; The sample circulation tray system includes a tray assembly arranged in the sealing box body and a driving assembly arranged outside the sealing box body; the tray assembly includes a tray bracket and a sample tray rotatably and cooperatively installed on the tray bracket, and a plurality of fixing positions for fixing sample cups are annularly and evenly arranged on the sample tray; the driving assembly includes a motor, and the motor is in transmission connection with the rotating shaft of the sample tray; The power liquid changing system includes a liquid inlet assembly and a liquid discharge assembly; the liquid inlet assembly includes a liquid inlet pump and a liquid inlet pipe connected to the liquid outlet of the liquid inlet pump, the liquid inlet pipe passes through the sealing box body and enters the sealing box body, and the liquid outlet of the liquid inlet pipe is located directly above the fixing position; the liquid discharge assembly includes a liquid discharge pump and a liquid discharge pipe connected to the liquid inlet of the liquid discharge pump, the liquid discharge pipe passes through the sealing box body and enters the sealing box body, and the liquid inlet of the liquid discharge pipe is located directly above the fixing position, and a lifting assembly for driving the liquid inlet of the liquid discharge pipe to descend into the corresponding sample cup or ascend to leave the corresponding sample cup is arranged in the sealing box body; The PLC automatic control unit is electrically connected to the motor, the liquid inlet pump, the liquid outlet pump, and the lifting assembly. The PLC automatic control unit controls the rotation of the sample tray through the motor, injects liquid into the corresponding sample cup through the liquid inlet pump, discharges the liquid in the corresponding sample cup through the liquid discharge pump, and drives the liquid discharge pipe to rise or fall through the lifting assembly.

[0008] Furthermore, an exhaust duct and an exhaust fan for discharging volatile acidic gases are provided at the top of the sealed box body. An acidic gas filtering device is provided at the end of the exhaust duct; the PLC automatic control unit is electrically connected to the exhaust fan.

[0009] Furthermore, the liquid inlet pump adopts a metering pump to control the liquid inlet volume.

[0010] Furthermore, the liquid discharge pump adopts a diaphragm metering pump. The diaphragm metering pump is made of corrosion-resistant composite materials. The diaphragm of the liquid discharge pump isolates the drive lubrication mechanism from the strong acid waste liquid.

[0011] Furthermore, the sealed box body is made of transparent acid-resistant PVC plates, and the sample cup is made of acid and alkali-resistant PVC materials.

[0012] Furthermore, the motor is located below the sample tray, and a transmission shaft is used to connect the motor and the sample tray. A sealing rubber pad is provided between the transmission shaft and the sealed box body.

[0013] Furthermore, the motor adopts a pulse motor.

[0014] Furthermore, the PLC automatic control unit further includes an operation interface for setting parameters including the water injection volume, the liquid discharge volume, the standing time, and the number of cycles, and for real-time displaying the working state.

[0015] Furthermore, a filter screen for preventing solid insoluble organic matter from entering is provided at the liquid inlet of the liquid discharge pipe.

[0016] The present invention also proposes an automatic extraction method for solid insoluble organic matter in sedimentary rocks, including the following steps: Step 1: After loading the sedimentary rock sample to be processed into the sample cup, place the sample cup in the fixed position; set the first hydrochloric acid injection volume, the first standing time, the first hydrochloric acid solution discharge volume, the hydrofluoric acid injection volume, the second standing time, the hydrofluoric acid solution discharge volume, the second hydrochloric acid injection volume, the third standing time, the second hydrochloric acid solution discharge volume, the water injection volume, the fourth standing time, and the drainage volume through the PLC automatic control unit; Step 2: Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject hydrochloric acid with a set first hydrochloric acid injection volume into all sample cups, and let it stand for a set first standing time to remove carbonates. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject hydrochloric acid with a set first hydrochloric acid injection volume into the sample cup; Step 3: Using the liquid inlet assembly and the sample circulation tray system, discharge the hydrochloric acid solution in all sample cups according to a set first hydrochloric acid solution discharge volume. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to discharge the hydrochloric acid solution in the sample cup according to a set first hydrochloric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; Step 4: Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject hydrofluoric acid with a set hydrofluoric acid injection volume into all sample cups, and let it stand for a set second standing time to remove silicates. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject hydrofluoric acid with a set hydrofluoric acid injection volume into the sample cup; Step 5: Using the liquid inlet assembly and the sample circulation tray system, discharge the hydrofluoric acid solution in all sample cups according to a set hydrofluoric acid solution discharge volume. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to discharge the hydrofluoric acid solution in the sample cup according to a set hydrofluoric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; Step 6: Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject hydrochloric acid with a set second hydrochloric acid injection volume into all sample cups, and let it stand for a set third standing time to remove the newly formed fluorinated liquid salt. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject hydrochloric acid with a set second hydrochloric acid injection volume into the sample cup; Step 7: Using the liquid inlet assembly and the sample circulation tray system, discharge the hydrochloric acid solution in all sample cups according to a set second hydrochloric acid solution discharge volume. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to discharge the hydrochloric acid solution in the sample cup according to a set second hydrochloric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; Step 8: Specimen cleaning 81) Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject neutral water with a set water injection volume into all sample cups, and let it stand for a set fourth standing time to clean the test sample. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject neutral water with a set water injection volume into the sample cup; 82) Using the liquid inlet assembly and the sample circulation tray system, drain the neutral water in all sample cups according to the set drainage volume. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to drain the neutral water in the sample cup according to the set drainage volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; 83) Repeat steps 81) - 82) in a cycle until the drained neutral water is neutral, and end the cleaning of the test sample.

[0017] The beneficial effects of the present invention are as follows: In the automatic extraction device for solid insoluble organic matter in sedimentary rock of the present invention, by setting up a sample sealing treatment system, using a sealed box to isolate the acidic gas generated during the extraction process of solid insoluble organic matter, so as to avoid polluting the surrounding environment and not affecting the health of experimental personnel; by setting up a sample circulation tray system, using the motor to drive the sample tray to rotate step by step to automatically dock with the power liquid exchange system. When injecting liquid, the liquid inlet assembly can dock with different sample cups in sequence and inject liquid into the sample cup. When draining liquid, the drain assembly can dock with different sample cups in sequence and drain the liquid in the sample cup; by setting up a PLC automatic control unit, the automation of the extraction process of solid insoluble organic matter can be realized. The whole process requires no manual participation or can greatly reduce manual participation. Each process step is strictly executed according to the set standards, which can improve efficiency. Description of the Drawings

[0018] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the following drawings are provided for illustration: Figure 1 It is a schematic structural diagram of an embodiment of the automatic extraction device for solid insoluble organic matter in sedimentary rock of the present invention.

[0019] Description of the reference numerals in the drawings: 1 - Liquid inlet pump: Complete the quantitative water injection for each sample cup; 2 - Liquid outlet pump: Complete the quantitative water discharge for each sample cup; 3 - Motor: Connect the sample tray and drive the sample cup to rotate regularly; 4 - Transmission shaft: Connect the motor and the sample tray; 5 - Sample tray: Carry the sample cup; 6 - Sealing rubber gasket: Seals the drive shaft to prevent the leakage of volatile gases; 7 - Liquid inlet pipe; 8 - Tray support; 9 - Sample cup; 10 - Drain pipe; 11 - Pipe support; 12 - Sealed box; 13 - Exhaust fan: Exhausts strongly volatile acidic gases; 14 - PLC automatic control unit: Connects the motor, liquid inlet pump, liquid outlet pump, exhaust fan, and lifting assembly to achieve automated process control and realizes human - machine interaction through the operation interface. Specific embodiments

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it. However, the embodiments given are not intended to limit the present invention.

[0021] As Figure 1 shown, the automatic extraction device for solid insoluble organic matter in sedimentary rocks in this embodiment includes a sample sealing and treatment system, a sample circulation tray system, a power liquid - changing system, and a PLC automatic control unit 14.

[0022] Specifically, in this embodiment, the sample sealing and treatment system includes a sealed box 12 made of acid - resistant materials to isolate the acidic gases generated during the extraction of solid insoluble organic matter, so as to avoid polluting the surrounding environment and not affecting the health of experimental personnel. In the preferred embodiment of this embodiment, the top of the sealed box 12 is provided with an exhaust pipe (not shown in the figure) and an exhaust fan 13 for exhausting volatile acidic gases, and the end of the exhaust pipe is provided with an acidic gas filtering device (not shown in the figure).

[0023] In this embodiment, the sample circulation tray system includes a tray assembly disposed within the sealed box body 12 and a drive assembly disposed outside the sealed box body. Specifically, the tray assembly includes a tray support 8 and a sample tray 5 rotatably and fittingly mounted on the tray support 8. A plurality of fixing positions for fixing sample cups 9 are evenly distributed in a ring on the sample tray 5. The drive assembly of this embodiment includes a motor 3, and the motor 3 is in transmission connection with the rotating shaft of the sample tray 5. In this embodiment, the motor 3 is located below the sample tray 5, and a transmission shaft 4 is used to connect the motor 3 and the sample tray 5. A sealing rubber pad 6 is provided between the transmission shaft 4 and the sealed box body 12. In a preferred embodiment of this embodiment, the motor 3 is a pulse motor. A pulse motor is a motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement, that is: for each input pulse signal, the rotor rotates an angle or moves forward one step. Its output angular displacement or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency. According to this principle, in this embodiment, the angle of each displacement is set according to the position of the fixing position on the sample tray 5 where the sample cup 9 is loaded, and it automatically stops after rotating to each angle to complete the water injection and waste liquid extraction of the sample.

[0024] In this embodiment, the power liquid exchange system includes a liquid inlet assembly and a liquid discharge assembly. Specifically, the liquid inlet assembly includes a liquid inlet pump 1 and a liquid inlet pipe 7 connected to the liquid outlet of the liquid inlet pump 1. The liquid inlet pipe 7 passes through the sealed box body 12 and enters the sealed box body 12, and the liquid outlet of the liquid inlet pipe 7 is located directly above the fixing position. Thus, during the rotation of the sample tray 5, the liquid outlet of the liquid inlet pipe 7 can be docked with the sample cups 9 at different fixing positions to inject liquid into the corresponding sample cups 9. The liquid discharge assembly includes a liquid discharge pump 2 and a liquid discharge pipe 10 connected to the liquid inlet of the liquid discharge pump 2. The liquid discharge pipe 10 passes through the sealed box body 12 and enters the sealed box body 12, and the liquid inlet of the liquid discharge pipe 10 is located directly above the fixing position. Similarly, during the rotation of the sample tray 5, the liquid inlet of the liquid discharge pipe 10 can be docked with the sample cups 9 at different fixing positions. Specifically, in order to discharge the liquid in the sample cup 9, a lifting assembly (not shown in the figure) for driving the liquid inlet of the liquid discharge pipe 10 to descend into the corresponding sample cup or ascend to leave the corresponding sample cup is provided within the sealed box body of this embodiment. Specifically, the lifting assembly can be implemented in a variety of existing ways. For example, the lifting assembly can include a vertical track and a vertical slider slidably fitted with the vertical track. The liquid discharge pipe 10 is fixed to the vertical slider, and the vertical slider is driven to move along the vertical track by a linear drive mechanism (such as a threaded lead screw mechanism), thereby driving the liquid inlet of the liquid discharge pipe 10 to ascend or descend, which will not be elaborated further.

[0025] In a preferred embodiment of this embodiment, the liquid inlet pump 1 is a metering pump, which can accurately control the liquid inlet volume of the liquid injected into the sample cup 9.

[0026] In the preferred embodiment of the present embodiment, the drain pump 2 is a diaphragm metering pump, which is made of corrosion-resistant composite materials. The diaphragm metering pump uses a specially designed and processed flexible diaphragm to replace the piston, and realizes reciprocating motion under the action of the driving mechanism to complete the suction and discharge processes. Due to the isolation effect of the diaphragm, the diaphragm metering pump realizes the isolation between the strong acid waste liquid and the driving and lubricating mechanism.

[0027] In the preferred embodiment of the present embodiment, a filter screen for preventing solid insoluble organic matter from entering is provided at the liquid inlet of the drain pipe 10.

[0028] A pipe support 11 is provided between the inlet pipe 7 and the drain pipe 10 of the present embodiment to fix the positions of the inlet pipe 7 and the drain pipe 10.

[0029] The PLC automatic control unit 14 of the present embodiment is electrically connected to the motor 3, the inlet pump 1, the outlet pump 2, the lifting assembly and the exhaust fan 13. The PLC automatic control unit 14 controls the rotation of the sample tray 5 through the motor 13, injects liquid into the corresponding sample cup 9 through the inlet pump 1, discharges the liquid in the corresponding sample cup 9 through the drain pump 2, drives the drain pipe 10 to rise or fall through the lifting assembly, and discharges the generated acidic gas from the sealed box 12 through the exhaust fan 13, so as to realize the automation of the extraction process of solid insoluble organic matter, and has the characteristics of strong versatility, convenient use, wide adaptability, high reliability, strong anti-interference ability, simple programming, etc. Finally, through the operation interface, the fully automatic water change process is completed. That is, in the preferred embodiment of the present embodiment, the PLC automatic control unit 14 further includes an operation interface for setting parameters including water injection volume, drainage volume, standing time and number of cycles, and for displaying the working status in real time.

[0030] In the preferred embodiment of the present embodiment, the sealed box 12 is made of transparent acid-resistant PVC board, and the sample cup 9 is made of acid and alkali-resistant PVC material to avoid acid corrosion.

[0031] The automatic extraction device for solid insoluble organic matter in sedimentary rocks of the present embodiment, by setting a sample sealing treatment system, uses a sealed box to isolate the acidic gas generated during the extraction process of solid insoluble organic matter, so as to avoid polluting the surrounding environment and not affecting the health of experimental personnel; by setting a sample circulation tray system, uses a motor to drive the sample tray to rotate step by step to automatically dock with the power liquid change system. When injecting liquid, the liquid inlet assembly can dock with different sample cups in turn and inject liquid into the sample cup. When discharging liquid, the liquid discharge assembly can dock with different sample cups in turn and discharge the liquid in the sample cup; by setting a PLC automatic control unit, the automation of the extraction process of solid insoluble organic matter can be realized. The whole process does not require manual participation or can greatly reduce manual participation. Each process step is strictly executed according to the set standards, which can improve efficiency.

[0032] The following will describe the specific implementation of the automatic extraction method for solid insoluble organic matter in sedimentary rock in combination with the above-mentioned automatic extraction device for solid insoluble organic matter in sedimentary rock.

[0033] The automatic extraction method for solid insoluble organic matter in sedimentary rock in this embodiment includes the following steps.

[0034] Step 1: After loading the sedimentary rock sample to be processed into the sample cup 9, place the sample cup 9 in the fixed position; set parameters such as the first hydrochloric acid injection volume, the first standing time, the first hydrochloric acid solution discharge volume, the hydrofluoric acid injection volume, the second standing time, the hydrofluoric acid solution discharge volume, the second hydrochloric acid injection volume, the third standing time, the second hydrochloric acid solution discharge volume, the water injection volume, the fourth standing time, and the drainage volume through the PLC automatic control unit 14.

[0035] Step 2: Use the liquid inlet assembly and the sample circulation tray system to quantitatively inject hydrochloric acid with the set first hydrochloric acid injection volume into all the sample cups 9, and let it stand for the set first standing time to remove carbonates. The method is: use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid outlet of the liquid inlet pipe 7, and start the liquid inlet pump 1 to quantitatively inject hydrochloric acid with the set first hydrochloric acid injection volume into the sample cup 9.

[0036] Step 3: Use the liquid inlet assembly and the sample circulation tray system to discharge the hydrochloric acid solution in all the sample cups 9 according to the set first hydrochloric acid solution discharge volume. The method is: use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid inlet of the drain pipe 10, use the lifting assembly to drive the drain pipe 10 to descend and enter the sample cup 9, start the drain pump 2 to discharge the hydrochloric acid solution in the sample cup 9 according to the set first hydrochloric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe 10 to rise and leave the sample cup 9.

[0037] Step 4: Use the liquid inlet assembly and the sample circulation tray system to quantitatively inject hydrofluoric acid with the set hydrofluoric acid injection volume into all the sample cups 9, and let it stand for the set second standing time to remove silicates. The method is: use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid outlet of the liquid inlet pipe 7, and start the liquid inlet pump 1 to quantitatively inject hydrofluoric acid with the set hydrofluoric acid injection volume into the sample cup 9.

[0038] Step 5: Use the liquid inlet assembly and the sample circulation tray system to discharge the hydrofluoric acid solution in all the sample cups 9 according to the set hydrofluoric acid solution discharge volume. The method is: use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid inlet of the drain pipe 10, use the lifting assembly to drive the drain pipe 10 to descend and enter the sample cup 9, start the drain pump 2 to discharge the hydrofluoric acid solution in the sample cup 9 according to the set hydrofluoric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe 10 to rise and leave the sample cup 9.

[0039] Step 6: Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject hydrochloric acid with a set second hydrochloric acid injection volume into all the sample cups 9, and let it stand for a set third standing time to remove the newly formed fluorinated liquid salt. The method is as follows: Use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid outlet of the liquid inlet pipe 7, and start the liquid inlet pump 1 to quantitatively inject hydrochloric acid with a set second hydrochloric acid injection volume into the sample cup.

[0040] Step 7: Using the liquid inlet assembly and the sample circulation tray system, discharge the hydrochloric acid solution in all the sample cups 9 according to the set second hydrochloric acid solution discharge volume. The method is as follows: Use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid inlet of the drain pipe 10, use the lifting assembly to drive the drain pipe 10 to descend and enter the sample cup 9, start the drain pump 2 to discharge the hydrochloric acid solution in the sample cup 9 according to the set second hydrochloric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe 10 to rise and leave the sample cup 9.

[0041] Step 8: Specimen cleaning 81) Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject neutral water with a set water injection volume into all the sample cups 9, and let it stand for a set fourth standing time to clean the specimen. The method is as follows: Use the motor 3 to drive the sample tray 5 to rotate, so that the sample cup 9 is directly below the liquid outlet of the liquid inlet pipe 7, and start the liquid inlet pump 1 to quantitatively inject neutral water with a set water injection volume into the sample cup 9.

[0042] 82) Using the liquid inlet assembly and the sample circulation tray system, discharge the neutral water in all the sample cups 9 according to the set drainage volume. The method is as follows: Use the motor 3 to drive the sample tray to rotate, so that the sample cup 9 is directly below the liquid inlet of the drain pipe 10, use the lifting assembly to drive the drain pipe 10 to descend and enter the sample cup 9, start the drain pump 2 to discharge the neutral water in the sample cup 9 according to the set drainage volume, and then use the lifting assembly to drive the drain pipe 10 to rise and leave the sample cup 9.

[0043] 83) Repeat steps 81) - 82) until the discharged neutral water is neutral, and end the specimen cleaning.

[0044] The above - described embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. An automatic extraction device for solid insoluble organic matter in sedimentary rock, characterized in that: It includes a sample sealing and treatment system, a sample circulation tray system, a power liquid changing system, and a PLC automatic control unit; The sample sealing and treatment system includes a sealing box body made of acid-resistant materials; The sample circulation tray system includes a tray assembly disposed inside the sealing box body and a driving assembly disposed outside the sealing box body; the tray assembly includes a tray support and a sample tray rotatably and fittingly mounted on the tray support, and a plurality of fixing positions for fixing sample cups are evenly distributed in a ring on the sample tray; the driving assembly includes a motor, and the motor is in transmission connection with the rotating shaft of the sample tray; The power liquid changing system includes a liquid inlet assembly and a liquid discharge assembly; the liquid inlet assembly includes a liquid inlet pump and a liquid inlet pipe connected to the liquid outlet of the liquid inlet pump, the liquid inlet pipe passes through the sealing box body and enters the sealing box body, and the liquid outlet of the liquid inlet pipe is located directly above the fixing position; the liquid discharge assembly includes a liquid discharge pump and a liquid discharge pipe connected to the liquid inlet of the liquid discharge pump, the liquid discharge pipe passes through the sealing box body and enters the sealing box body, and the liquid inlet of the liquid discharge pipe is located directly above the fixing position, and a lifting assembly for driving the liquid inlet of the liquid discharge pipe to descend into the corresponding sample cup or ascend to leave the corresponding sample cup is provided inside the sealing box body; The PLC automatic control unit is electrically connected to the motor, the liquid inlet pump, the liquid outlet pump, and the lifting assembly, and the PLC automatic control unit controls the rotation of the sample tray through the motor, injects liquid into the corresponding sample cup through the liquid inlet pump, discharges the liquid in the corresponding sample cup through the liquid discharge pump, and drives the liquid discharge pipe to ascend or descend through the lifting assembly.

2. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, characterized in that: An exhaust pipeline and an exhaust fan for discharging volatile acidic gases are provided at the top of the sealing box body; an acidic gas filtering device is provided at the end of the exhaust pipeline; the PLC automatic control unit is electrically connected to the exhaust fan.

3. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, wherein: The liquid inlet pump uses a metering pump to control the liquid inlet volume.

4. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, wherein: The liquid discharge pump uses a diaphragm metering pump, the diaphragm metering pump is made of corrosion-resistant composite materials, and the diaphragm of the liquid discharge pump isolates the driving and lubricating mechanism from strong acid waste liquid.

5. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, characterized in that: The sealing box body is made of transparent acid-resistant PVC plates, and the sample cup is made of acid- and alkali-resistant PVC materials.

6. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, characterized in that: The motor is located below the sample tray, and a transmission shaft is used to connect the motor and the sample tray, and a sealing rubber pad is provided between the transmission shaft and the sealing box body.

7. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, characterized in that: The motor uses a pulse motor.

8. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, characterized in that: The PLC automatic control unit further includes an operation interface for setting parameters including water injection volume, liquid discharge volume, standing time, and cycle times, and for real-time displaying the working state.

9. The automatic extraction device for solid insoluble organic matter in sedimentary rock according to claim 1, wherein: A filter screen for preventing solid insoluble organic matter from entering is provided at the liquid inlet of the liquid discharge pipe.

10. A method for automatically extracting solid insoluble organic matter in sedimentary rock, characterized in that: It includes the following steps: Step 1: After loading the sedimentary rock sample to be processed into the sample cup, place the sample cup in the fixed position; set the first hydrochloric acid injection volume, the first standing time, the first hydrochloric acid solution discharge volume, the hydrofluoric acid injection volume, the second standing time, the hydrofluoric acid solution discharge volume, the second hydrochloric acid injection volume, the third standing time, the second hydrochloric acid solution discharge volume, the water injection volume, the fourth standing time, and the water discharge volume through the PLC automatic control unit; Step 2: Use the liquid inlet assembly and the sample circulation tray system to quantitatively inject hydrochloric acid with the set first hydrochloric acid injection volume into all sample cups, and let it stand for the set first standing time to remove carbonates. The method is: use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject hydrochloric acid with the set first hydrochloric acid injection volume into the sample cup; Step 3: Use the liquid inlet assembly and the sample circulation tray system to discharge the hydrochloric acid solution in all sample cups according to the set first hydrochloric acid solution discharge volume. The method is: use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to discharge the hydrochloric acid solution in the sample cup according to the set first hydrochloric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; Step 4: Use the liquid inlet assembly and the sample circulation tray system to quantitatively inject hydrofluoric acid with the set hydrofluoric acid injection volume into all sample cups, and let it stand for the set second standing time to remove silicates. The method is: use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject hydrofluoric acid with the set hydrofluoric acid injection volume into the sample cup; Step 5: Use the liquid inlet assembly and the sample circulation tray system to discharge the hydrofluoric acid solution in all sample cups according to the set hydrofluoric acid solution discharge volume. The method is: use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to discharge the hydrofluoric acid solution in the sample cup according to the set hydrofluoric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; Step 6: Use the liquid inlet assembly and the sample circulation tray system to quantitatively inject hydrochloric acid with the set second hydrochloric acid injection volume into all sample cups, and let it stand for the set third standing time to remove the newly formed fluorinated liquid salt. The method is: use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject hydrochloric acid with the set second hydrochloric acid injection volume into the sample cup; Step 7: Use the liquid inlet assembly and the sample circulation tray system to discharge the hydrochloric acid solution in all sample cups according to the set second hydrochloric acid solution discharge volume. The method is: use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to discharge the hydrochloric acid solution in the sample cup according to the set second hydrochloric acid solution discharge volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; Step 8: Sample cleaning 81) Using the liquid inlet assembly and the sample circulation tray system, quantitatively inject neutral water with a set injection volume into all sample cups, and let it stand for a set fourth standing time to clean the test specimens. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid outlet of the liquid inlet pipe, and start the liquid inlet pump to quantitatively inject neutral water with a set injection volume into the sample cup; 82) Using the liquid inlet assembly and the sample circulation tray system, drain the neutral water in all sample cups according to the set drainage volume. The method is as follows: Use the motor to drive the sample tray to rotate, so that the sample cup is directly below the liquid inlet of the drain pipe, use the lifting assembly to drive the drain pipe to descend and enter the sample cup, start the drain pump to drain the neutral water in the sample cup according to the set drainage volume, and then use the lifting assembly to drive the drain pipe to rise and leave the sample cup; 83) Repeat steps 81)-82) until the drained neutral water is neutral, and end the cleaning of the test specimens.

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