Process system for graded extraction and conversion of organic matters in coal

Abstract

The utility model discloses a process system for graded extraction and conversion of organic matters in coal. Comprising a crusher, a first screw conveyor, an extraction sedimentation tank, an ultrasonic generator, a first filter tank, a second screw conveyor, a first drying device, a third screw conveyor, a high-pressure reaction kettle, a second centrifugal pump, a second condenser, a second filter tank, a fourth screw conveyor, a second drying device and a fifth screw conveyor. According to the utility model, organic matters in the coal can be effectively extracted, soluble substances and raffinate can be extracted, the raffinate is subjected to series separation, light raffinate can be obtained, the light raffinate is subjected to hydrogenation, hot melting, alcoholysis and other reaction conversion through the high-pressure reaction kettle, a series of high-added-value products can be obtained, graded utilization of the coal is realized, and the utilization rate of raw coal is improved.

Description

Technical Field

[0001] The utility model relates to the field of coal chemical industry, in particular to a process system for graded extraction and conversion of organic matter in coal. Background Art

[0002] In traditional energy utilization, coal is typically used as the primary fuel for thermal power plants or as a direct fuel for winter heating. This simple, direct combustion method not only fails to fully realize the potential value of raw coal but also has significant negative environmental impacts, including air pollution and increased greenhouse gas emissions. Therefore, to more efficiently utilize coal resources while mitigating environmental impacts and achieving a balance between comprehensive utilization of coal resources and environmental protection, it is necessary to provide a process system for the graded extraction and conversion of organic matter from coal that improves raw coal utilization and reduces environmental pollution. Summary of the Invention

[0003] In response to the above-mentioned deficiencies in the prior art, the present invention provides a process system for the graded extraction and conversion of organic matter in coal. On the one hand, soluble organic matter in the coal is extracted to achieve further resource utilization; on the other hand, the light residue is subjected to hydrogenation, thermal melting and alcoholysis reactions to produce products with higher added value, thereby achieving high added value utilization of coal.

[0004] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present utility model is:

[0005] Provided is a process system for graded extraction and conversion of organic matter in coal, comprising a crusher, a first screw conveyor, an extraction sedimentation tank, an ultrasonic generator, a first filter tank, a second screw conveyor, a first drying device, a third screw conveyor, a high-pressure reactor, a second centrifugal pump, a second condenser, a second filter tank, a fourth screw conveyor, a second drying device, and a fifth screw conveyor; the first screw conveyor transports the coal powder generated by the crusher to the extraction sedimentation tank, the ultrasonic generator is arranged in the extraction sedimentation tank, the extraction sedimentation tank is connected to the first filter tank through a first pipeline, and the extraction sedimentation tank generates a first filtrate and a first The filter cake is conveyed by the second screw conveyor to the first drying device. The third screw conveyor conveys the first filter cake dried by the first drying device to the high-pressure reactor. The high-pressure reactor conveys the product to the second condenser through the second centrifugal pump for cooling. The high-pressure reactor is connected to the second centrifugal pump through the seventh pipeline. The second condenser is connected to the second filter tank through the eighth pipeline. The second filter tank generates a second filtrate and a second filter cake through the second filtering device. The fourth screw conveyor conveys the second filter cake to the second drying device. The fifth screw conveyor is used to convey the insoluble residue after drying in the second drying device to the residue temporary storage area.

[0006] Furthermore, the high-pressure reactor is provided with a first feed port cooperating with the third screw conveyor, a discharge port cooperating with the seventh pipeline, and a second feed port.

[0007] Furthermore, a stirring mechanism is provided inside the high-pressure reactor, and the stirring mechanism includes a stirring motor and a stirring paddle fixed to the output end of the stirring motor.

[0008] Furthermore, a first solvent recovery subsystem is arranged between the extraction sedimentation tank and the first filtration tank. The first solvent recovery subsystem is used for solvent recovery of the first filtrate and enrichment of the extraction soluble matter. The first solvent recovery subsystem includes a third centrifugal pump, a first distillation tower and a first centrifugal pump. The third centrifugal pump is connected to the first filtration tank through a second pipeline, the third centrifugal pump is connected to the first distillation tower through a pipeline, the first distillation tower is connected to the first centrifugal pump through a third pipeline, the output end of the first centrifugal pump is connected to the extraction sedimentation tank through a pipeline, and the first distillation tower is connected to the product storage tank through a fourth pipeline.

[0009] Furthermore, a second solvent recovery subsystem is provided between the second filter tank and the high-pressure reactor. The second solvent recovery subsystem is used for solvent recovery of the second filtrate and enrichment of the extracted soluble matter. The second solvent recovery subsystem includes a fourth centrifugal pump and a second distillation tower. The fourth centrifugal pump is connected to the second filter tank through a pipeline. The fourth centrifugal pump and the second distillation tower are connected through a ninth pipeline. The second distillation tower and the high-pressure reactor are connected through a tenth pipeline. The second distillation tower is connected to the product storage tank through an eleventh pipeline.

[0010] Furthermore, a first condensation subsystem is provided between the extraction sedimentation tank and the first drying device. The first condensation subsystem includes a first condenser. The first condenser is connected to the first drying device via a fifth pipe, and the first condenser is connected to the extraction sedimentation tank via a sixth pipe.

[0011] Furthermore, a second condensation subsystem is provided between the second drying device and the high-pressure reactor. The second condensation subsystem includes a third condenser. The third condenser is connected to the second drying device via a twelfth pipeline, and the third condenser is connected to the high-pressure reactor via a thirteenth pipeline.

[0012] Furthermore, the first filtering device and the second filtering device are both plate and frame filter presses, and the plate and frame filter presses are used to generate filter cakes and filtrates.

[0013] Furthermore, the first drying device and the second drying device are both closed ovens, and openings are provided on the tops of the first drying device and the second drying device.

[0014] The beneficial effects of the utility model are:

[0015] The utility model can effectively extract organic matter from coal to obtain soluble matter and residue. The residue is separated in series to obtain light residue. The light residue is then subjected to hydrogenation, thermal melting and alcoholysis in a high-pressure reactor to obtain a series of high-value-added products, thereby realizing the graded utilization of coal and improving the utilization rate of raw coal.

[0016] The utility model adopts a simple and effective extraction and filtration method to separate the light and insoluble components in the coal, and combines it with reactions such as hydrogenation, thermal melting and alcoholysis to achieve graded and quality-enhanced utilization of the coal, which can not only reduce the environmental pollution caused by direct combustion of coal, but also realize the resource utilization of coal and improve the utilization rate of raw coal.

[0017] The utility model adopts a mixed solvent of equal volumes of acetone and carbon disulfide as an extractant, effectively combining the extraction properties of the two solvents on organic matter, and can simultaneously and efficiently extract organic matter such as aromatic hydrocarbons, esters, aldehydes, alcohols and hydrocarbons contained in coal.

[0018] The utility model adopts an ultrasonic generator built into the extraction sedimentation tank to assist solvent extraction, and fully mixes the coal sample and the mixed solvent during the extraction process in a physical way, thereby effectively improving the solvent extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] The main components in the figure are described as follows:

[0021] 1. Crusher; 2. Extraction and sedimentation tank; 3. Ultrasonic generator; 4. First filter tank; 5. First distillation tower; 6. First drying device; 7. First condenser; 8. First feed port; 9. Stirring motor; 10. Second feed port; 11. High-pressure reactor; 12. Stirring paddle; 13. Second condenser; 14. Second filter tank; 15. Second drying device; 16. Third condenser; 17. Second distillation tower; 18. First centrifugal pump; 19. Second centrifugal pump; 20. Third centrifugal pump; 2 1. Fourth centrifugal pump; 22. First screw conveyor; 23. First pipeline; 24. Second pipeline; 25. Third pipeline; 26. Fourth pipeline; 27. Second screw conveyor; 28. Fifth pipeline; 29. ​​Sixth pipeline; 30. Third screw conveyor; 31. Seventh pipeline; 32. Eighth pipeline; 33. Ninth pipeline; 34. Tenth pipeline; 35. Eleventh pipeline; 36. Fourth screw conveyor; 37. Twelfth pipeline; 38. Thirteenth pipeline; 39. Fifth screw conveyor. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation methods. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.

[0023] like Figure 1 As shown, the process system for graded extraction and conversion of organic matter in coal includes a crusher 1, a first screw conveyor 22, an extraction sedimentation tank 2, an ultrasonic generator 3, a first filter tank 4, a second screw conveyor 27, a first drying device 6, a third screw conveyor 30, an autoclave 11, a second centrifugal pump 19, a second condenser 13, a second filter tank 14, a fourth screw conveyor 36, a second drying device 15, and a fifth screw conveyor 39. The first screw conveyor 22 transports the pulverized coal produced by the crusher 1 to the extraction sedimentation tank 2. The crusher 1 is used to crush the raw coal and screen out pulverized coal with a particle size greater than 200 mesh for future use. An ultrasonic generator 3 is located within the extraction sedimentation tank 2 to provide ultrasonic waves of a certain power for the extraction process. The extraction sedimentation tank 2 is connected to the first filter tank 4 via a first pipeline 23. The extraction sedimentation tank 2 generates a first filtrate and a first filter cake through the first filter device. The first filtrate contains the extracted soluble matter, and the first filter cake contains the light raffinate and the heavy raffinate. Second screw conveyor 27 transports the first filter cake to first drying device 6. Third screw conveyor 30 transports the first filter cake dried in first drying device 6 to autoclave 11. Autoclave 11 then transports the product to second condenser 13 via second centrifugal pump 19 for cooling. Autoclave 11 and second centrifugal pump 19 are connected via seventh pipeline 31. Second condenser 13 and second filter tank 14 are connected via eighth pipeline 32. Second filter tank 14 generates a second filtrate and a second filter cake through the second filtration device. Fourth screw conveyor 36 transports the second filter cake to second drying device 15. Fifth screw conveyor 39 transports the dried insoluble residue from second drying device 15 to the temporary residue storage area.

[0024] The autoclave 11 is equipped with a first feed port 8 that cooperates with a third screw conveyor 30, a discharge port that cooperates with a seventh pipe 31, and a second feed port 10. The autoclave 11 is internally provided with a stirring mechanism comprising a stirring motor 9 and a stirring paddle 12 fixed to the output end of the stirring motor 9. The stirring mechanism primarily functions to ensure thorough mixing of the reaction materials during the reaction process.

[0025] A first solvent recovery subsystem is provided between the extraction sedimentation tank 2 and the first filter tank 4. The first solvent recovery subsystem is used for solvent recovery of the first filtrate and enrichment of the extraction soluble matter. The first solvent recovery subsystem includes a third centrifugal pump 20, a first distillation tower 5 and a first centrifugal pump 18. The third centrifugal pump 20 is connected to the first filter tank 4 through a second pipeline 24, the third centrifugal pump 20 is connected to the first distillation tower 5 through a pipeline, the first distillation tower 5 is connected to the first centrifugal pump 18 through a third pipeline 25, the output end of the first centrifugal pump 18 is connected to the extraction sedimentation tank 2 through a pipeline, and the first distillation tower 5 is connected to the product storage tank through a fourth pipeline 26.

[0026] A second solvent recovery subsystem is provided between the second filter tank 14 and the high-pressure reactor 11. The second solvent recovery subsystem is used for recovering the solvent of the second filtrate and enriching the soluble matter in the extraction. The second solvent recovery subsystem includes a fourth centrifugal pump 21 and a second distillation tower 17. The fourth centrifugal pump 21 is connected to the second filter tank 14 through a pipeline. The fourth centrifugal pump 21 is connected to the second distillation tower 17 through a ninth pipeline 33. The second distillation tower 17 is connected to the high-pressure reactor 11 through a tenth pipeline 34. The second distillation tower 17 is connected to the product storage tank through an eleventh pipeline 35.

[0027] A first condensation subsystem is provided between the extraction sedimentation tank 2 and the first drying device 6 , and the first condensation subsystem includes a first condenser 7 . The first condenser 7 is connected to the first drying device 6 via a fifth pipe 28 , and the first condenser 7 is connected to the extraction sedimentation tank 2 via a sixth pipe 29 .

[0028] A second condensation subsystem is provided between the second drying device 15 and the high-pressure reactor 11. The second condensation subsystem includes a third condenser 16. The third condenser 16 is connected to the second drying device 15 via a twelfth pipeline 37, and the third condenser 16 is connected to the high-pressure reactor 11 via a thirteenth pipeline 38.

[0029] In this embodiment, the first filtering device and the second filtering device are both plate and frame filter presses, which are used to generate filter cakes and filtrates.

[0030] In this embodiment, the first drying device 6 and the second drying device 15 are both closed ovens, and the tops of the first drying device 6 and the second drying device 15 are both provided with openings. The actual drying pressure can be set to pressurized, normal pressure and negative pressure.

[0031] A method for the graded extraction and conversion system of organic matter in coal:

[0032] S1: The raw coal is crushed by crusher 1 and sieved to obtain a coal sample with a pulverized particle size greater than 200 mesh; equal volumes of acetone and carbon disulfide solvent are mixed to obtain a mixed solvent;

[0033] S2: Add the mixed solvent and the coal sample into the extraction sedimentation tank 2 in a certain proportion to preliminarily mix the coal sample and the mixed solvent, wherein the volume ratio of acetone to carbon disulfide is 1:1, and the mixing ratio of coal powder to mixed solvent is mass: volume = 1g:10mL, and a special membrane or cover is used as a seal to seal the extraction sedimentation tank 2 to prevent the solvent from volatilizing during the extraction process;

[0034] S3: Start the ultrasonic generator 3 and perform ultrasonic extraction for 30 minutes, using the generated ultrasonic waves to fully contact the coal sample with the mixed solvent during the extraction process;

[0035] S4: After extraction, a certain amount of CCl4 is added to the extraction sedimentation tank 2, and the volume ratio of CCl4 to the extraction product is equal to 1:2. The light and heavy components of the extraction product are separated by utilizing the different densities of the components;

[0036] S5: The lower layer product in the extraction sedimentation tank 2 is transferred to the first filtration tank 4 through the first pipeline 23, and filtered through a plate filter to obtain a certain amount of extraction soluble matter and heavy raffinate. The extraction soluble matter is recovered through the first solvent recovery subsystem; the extraction soluble matter is a mixture of aromatic hydrocarbons, phenols, alcohols and esters;

[0037] S6: The upper layer product in the extraction sedimentation tank 2 is transferred to the first filtration tank 4 through the first pipeline 23, and filtered through a plate filter to obtain a certain amount of extraction soluble matter and light raffinate, and the extraction soluble matter is recovered through the first solvent recovery subsystem;

[0038] S7: The light raffinate is sent to the first drying device 6 for drying via the second screw conveyor 27, and then sent to the autoclave 11 through the first feed port 8 of the third screw conveyor 30 to be mixed with the corresponding solvent and catalyst in a certain proportion, and then the corresponding gas is charged into the autoclave through the second feed port 10 to maintain a certain initial pressure in the autoclave, and the reaction conditions are set to carry out the corresponding conversion reaction; wherein, the light raffinate obtained by extraction and filtration is mixed with the corresponding solvent in a volume ratio of 1:10 and added to the autoclave 11, and the air in the autoclave 11 is replaced with nitrogen three times at room temperature, and then a certain amount of H2 is charged to maintain the initial pressure at 1 MPa, and then the temperature in the autoclave 11 is set to rise to 300°C at 5°C / min and maintained for 4 hours;

[0039] S8: After the reaction is completed, the reaction product is transferred to the second condenser 13 through the seventh pipeline 31 to be cooled to room temperature, and then sent to the second filter tank 14 through the eighth pipeline 32. The plate filter in the second filter tank 14 is used for solid-liquid separation, and the filtrate is recovered through the second solvent recovery subsystem. The filter cake is dried by the second drying device 15 to obtain a liquid product and a solid product.

[0040] As a further explanation of the present utility model, the intermediate storage tanks required between the various devices and pipelines in the utility model "A system for graded extraction and conversion of organic matter in coal" are not shown in the process device diagram, but this does not mean that the present utility model does not include this content. In actual use, intermediate storage tanks are added and used according to the relevant standards of the chemical industry based on actual conditions.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the essential features of the present invention. Therefore, the embodiments should be considered as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that fall within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0042] In addition, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A process system for graded extraction and conversion of organic matter in coal, characterized in that: The invention comprises a crusher (1), a first screw conveyor (22), an extraction sedimentation tank (2), an ultrasonic generator (3), a first filter tank (4), a second screw conveyor (27), a first drying device (6), a third screw conveyor (30), a high-pressure reactor (11), a second centrifugal pump (19), a second condenser (13), a second filter tank (14), a fourth screw conveyor (36), a second drying device (15) and a fifth screw conveyor (39); The first screw conveyor (22) conveys the coal powder generated by the crusher (1) to the extraction sedimentation tank (2). The ultrasonic generator (3) is arranged in the extraction sedimentation tank (2). The extraction sedimentation tank (2) is connected to the first filter tank (4) through a first pipeline (23). The extraction sedimentation tank (2) generates a first filtrate and a first filter cake through the first filter device. The second screw conveyor (27) conveys the first filter cake to the first drying device (6). The third screw conveyor (30) conveys the first filter cake dried by the first drying device (6) to the high-pressure reactor (11). The high-pressure reactor (11) The product is transported to the second condenser (13) through the second centrifugal pump (19) for cooling. The high-pressure reactor (11) and the second centrifugal pump (19) are connected by a seventh pipeline (31). The second condenser (13) and the second filter tank (14) are connected by an eighth pipeline (32). The second filter tank (14) generates a second filtrate and a second filter cake through a second filtering device. The fourth screw conveyor (36) conveys the second filter cake to the second drying device (15). The fifth screw conveyor (39) is used to convey the insoluble residue dried in the second drying device (15) to a temporary residue storage area.

2. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: The high-pressure reactor (11) is provided with a first feed port (8) cooperating with the third screw conveyor (30), a discharge port cooperating with the seventh pipeline (31), and a second feed port (10).

3. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: A stirring mechanism is provided inside the high-pressure reactor (11), and the stirring mechanism comprises a stirring motor (9) and a stirring paddle (12) fixed to the output end of the stirring motor (9).

4. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: A first solvent recovery subsystem is provided between the extraction sedimentation tank (2) and the first filter tank (4). The first solvent recovery subsystem is used for recovering the solvent of the first filtrate and enriching the extraction soluble matter. The first solvent recovery subsystem comprises a third centrifugal pump (20), a first distillation tower (5) and a first centrifugal pump (18). The third centrifugal pump (20) is connected to the first filter tank (4) through a second pipeline (24), the third centrifugal pump (20) is connected to the first distillation tower (5) through a pipeline, the first distillation tower (5) is connected to the first centrifugal pump (18) through a third pipeline (25), the output end of the first centrifugal pump (18) is connected to the extraction sedimentation tank (2) through a pipeline, and the first distillation tower (5) is connected to the product storage tank through a fourth pipeline (26).

5. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: A second solvent recovery subsystem is provided between the second filter tank (14) and the high-pressure reactor (11). The second solvent recovery subsystem is used for recovering the solvent of the second filtrate and enriching the soluble matter in the extraction. The second solvent recovery subsystem comprises a fourth centrifugal pump (21) and a second distillation tower (17). The fourth centrifugal pump (21) is connected to the second filter tank (14) via a pipeline. The fourth centrifugal pump (21) and the second distillation tower (17) are connected via a ninth pipeline (33). The second distillation tower (17) and the high-pressure reactor (11) are connected via a tenth pipeline (34). The second distillation tower (17) is connected to the product storage tank via an eleventh pipeline (35).

6. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: A first condensation subsystem is provided between the extraction sedimentation tank (2) and the first drying device (6), the first condensation subsystem comprising a first condenser (7), the first condenser (7) and the first drying device (6) being connected via a fifth pipe (28), and the first condenser (7) and the extraction sedimentation tank (2) being connected via a sixth pipe (29).

7. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: A second condensation subsystem is provided between the second drying device (15) and the high-pressure reactor (11), and the second condensation subsystem includes a third condenser (16). The third condenser (16) is connected to the second drying device (15) via a twelfth pipeline (37), and the third condenser (16) is connected to the high-pressure reactor (11) via a thirteenth pipeline (38).

8. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: The first filtering device and the second filtering device are both plate and frame filter presses, and the plate and frame filter presses are used to generate filter cakes and filtrates.

9. A process system for graded extraction and conversion of organic matter in coal according to claim 1, characterized in that: The first drying device (6) and the second drying device (15) are both closed ovens, and the tops of the first drying device (6) and the second drying device (15) are both provided with openings.

Images