Hard carbon raw material purification device

Abstract

The hard carbon raw material purification device comprises a feeder, an extraction chamber, a purification channel, an evaporation chamber and a recovery channel, the feeder is arranged above the extraction chamber; one end of the purification channel is arranged below the extraction chamber, the other end of the purification channel is connected with the top of the evaporation chamber, and a filter is arranged at one end, close to the evaporation chamber, of the purification channel; one end of the recovery channel is connected with the upper part of the evaporation chamber, and the other end of the recovery channel is connected with an extraction liquid inlet of the extraction chamber. The utility model provides a hard carbon raw material purification device which can effectively prepare a hard carbon raw material from low-ash coal, the raw material purified by the hard carbon raw material purification device can obtain a high-purity hard carbon material after being washed, evaporated and dried for multiple times and subjected to high-temperature carbonization treatment, and due to the integrated design scheme of the hard carbon raw material purification device, the high-purity hard carbon material can be obtained. The purification process of the hard carbon raw material is simplified, meanwhile, the chemical reagent for extracting the low-ash coal can be recycled, chemical pollution is reduced, and the purification cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of hard carbon materials, and more specifically, particularly to a hard carbon raw material purification device. Background Art

[0002] At present, the main negative electrode material in my country is graphite. Due to production costs and insufficient technology, hard carbon accounts for a small share in the negative electrode market. With the advancement of technology, the market share of hard carbon negative electrode materials is also increasing year by year.

[0003] Hard carbon materials have an ordered structure, high crystallinity, and good physical and chemical properties, such as high specific capacity, good cycle stability, and low cost. The application of hard carbon as anode material for lithium-ion batteries has attracted particular attention because it can improve the energy density and cycle life of batteries.

[0004] Due to the low ash content of low ash coal, it is not easy to produce impurities and waste during the processing, which helps to maintain the purity and performance of hard carbon materials. At the same time, the high calorific value and combustion performance of low ash coal also help to improve the production efficiency and quality of hard carbon materials. Therefore, low ash coal is used as a high-quality raw material for preparing hard carbon materials, and the high quality characteristics of low ash coal are used to prepare high-performance hard carbon materials.

[0005] In order to obtain high-purity hard carbon raw materials, low-ash coal needs to be deeply deashed. Deashing technologies include physical methods, chemical methods, physical-chemical methods, and microbial desulfurization methods. Chemical methods are commonly used in the prior art, using chemical reagents such as acids, alkalis, or solvents to react with minerals in coal, thereby extracting coal and removing ash and minerals. This method can be applied in the early, mid-term, or late-stage processing of coal to obtain ultra-pure coal (UCC) as a raw material for hard carbon.

[0006] However, the process of chemically purifying hard carbon raw materials is relatively cumbersome, and the chemical reagents used to extract low-ash coal during the purification process are difficult to recover and will cause environmental pollution.

[0007] Therefore, the problems existing in the prior art need to be further improved and developed. Summary of the invention

[0008] (I) Purpose of the invention: In order to solve the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a hard carbon raw material purification device.

[0009] (ii) Technical solution: In order to solve the above technical problems, the present technical solution provides a hard carbon raw material purification device, comprising a feeder, an extraction chamber, a purification channel, an evaporation chamber and a recovery channel; the extraction chamber contains the extract, and the feeder is arranged above the extraction chamber; one end of the purification channel is arranged below the extraction chamber, and the other end is connected to the top of the evaporation chamber, and a filter is provided at one end of the purification channel close to the evaporation chamber; one end of the recovery channel is connected to the upper part of the evaporation chamber, and the other end is connected to the extract inlet of the extraction chamber.

[0010] Furthermore, the extraction chamber includes: an extraction chamber shell, a feed port, a stirring motor, a stirring shaft, a stirring rod low-temperature heater, an extraction liquid inlet and a feed door; the feed port is arranged on the upper side of the extraction chamber, the feed door is arranged at the feed port, and a sealing design is adopted between the feed door and the feed port; the extraction liquid inlet is arranged on the top cover of the extraction chamber shell, and the stirring motor is arranged at the center position of the outer side of the top cover of the extraction chamber; one end of the stirring shaft is arranged inside the extraction chamber and connected to the center point of the stirring rod, and the other end passes through the top cover of the extraction chamber and is connected to the stirring motor; the stirring rod is arranged at a position close to the bottom surface of the extraction chamber shell, the stirring rod and the bottom surface of the extraction chamber shell are both arranged horizontally, and there is a gap between the bottom surface of the extraction chamber shell and the stirring rod; the low-temperature heater is arranged below the outer side of the bottom surface of the extraction chamber shell.

[0011] Furthermore, the feeder is arranged at the feed inlet above the extraction chamber.

[0012] Furthermore, the purification channel includes a purification pipeline, a purification pump, a filter and a purification switch valve; the purification pump, the filter and the purification switch valve are all arranged on the purification pipeline, the purification pump is arranged on the side of the purification pipeline close to the extraction chamber, the purification switch valve is arranged on the side of the purification pipeline close to the evaporation chamber, and the filter is arranged between the purification pump and the purification switch valve.

[0013] Furthermore, the filter includes a filter inlet, a filter outlet, a filter element and a filter housing, and the filter housing is arranged between the filter inlet and the filter outlet; the filter inlet and the filter outlet are connected to the openings on both sides of the filter housing, and the filter housing is a barrel-shaped structure that is completely sealed except for the openings on both sides, and the interior of the filter housing is filled with the filter element.

[0014] Furthermore, the filter element is a titanium rod filter element, a ceramic fiber filter element or a stainless steel mesh filter element.

[0015] Furthermore, the evaporation chamber includes an evaporation chamber shell, a feeding port, a feeding door and an evaporation heater; the evaporation chamber shell is a tower-like structure that is completely sealed except for the top surface and the upper side openings, the feeding port is arranged on the side above the bottom of the evaporation chamber shell, the evaporation heater is arranged on the outside of the bottom surface of the evaporation chamber shell, the feeding door is arranged at the feeding port, and a sealing design is adopted between the feeding port and the feeding door.

[0016] Furthermore, a sealing design is adopted between the material taking port and the evaporation chamber shell.

[0017] Furthermore, the recovery channel includes a recovery pipeline, a recovery container, a condenser, and a recovery switch valve; the recovery container and the recovery switch valve are both arranged on the recovery pipeline, the recovery switch valve is arranged on a side of the recovery pipeline close to the extraction liquid inlet, the recovery container is arranged on the recovery pipeline above the recovery switch valve, the condenser is arranged inside the recovery container, and the extraction liquid is contained in the collection container.

[0018] Furthermore, the condenser is a spiral plate condenser, a shell and tube condenser, a plate condenser or a sleeve and tube condenser.

[0019] Beneficial effects: The utility model provides a hard carbon raw material purification device, which can effectively prepare hard carbon raw materials from low-ash coal. The raw materials purified by the utility model can be washed, evaporated and carbonized at high temperature to obtain high-purity hard carbon materials. These hard carbon materials can be used to manufacture high-performance battery negative electrode materials, such as negative electrode materials for sodium ion batteries. The utility model provides an integrated design scheme for a hard carbon raw material purification device, which simplifies the purification process of hard carbon raw materials. At the same time, the chemical reagents used to extract low-ash coal can be recycled, which reduces chemical pollution and reduces purification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a hard carbon raw material purification device of the utility model;

[0021] Figure 2 The utility model is a schematic diagram of the structure of a filter of a hard carbon raw material purification device.

[0022] Reference numerals:

[0023] 1-feeder, 2-extraction chamber, 3-purification channel, 4-evaporation chamber, 5-recovery channel, 6-extraction liquid;

[0024] 21-extraction chamber housing, 22-feeding port, 23-stirring motor, 24-stirring shaft, 25-stirring rod, 26-low temperature heater, 27-extraction liquid inlet, 28-feeding door;

[0025] 31-purification pipeline, 32-purification pump, 33-filter, 34-purification switch valve;

[0026] 41 - evaporation chamber shell, 42 - material taking port, 43 - material taking door, 44 - evaporation heater;

[0027] 51-recovery pipeline, 52-recovery container, 53-condenser, 54-recovery switch valve;

[0028] 331 - filter inlet, 332 - filter outlet, 333 - filter element, 334 - filter housing. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with preferred embodiments. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0030] The accompanying drawings are schematic diagrams of embodiments of the present invention. It should be noted that the drawings are only examples and are not drawn in proportion, and should not be used as a limitation on the actual protection scope of the present invention.

[0031] A hard carbon raw material purification device uses low-ash coal as hard carbon raw material, such as Figure 1 As shown, it includes a feeder 1, an extraction chamber 2, a purification channel 3, an evaporation chamber 4 and a recovery channel 5. The feeder 1 is arranged at a feed port 21 above the extraction chamber 2, one end of the purification channel 3 is arranged below the extraction chamber 2, the other end of the purification channel 3 is connected to the top of the evaporation chamber 4, the upper end of the evaporation chamber 4 is connected to one end of the recovery channel 5, and the other end of the recovery channel 5 is connected to the extract inlet 27 of the extraction chamber 2.

[0032] like Figure 1As shown, the extraction chamber 2 comprises: an extraction chamber shell 21, a feed port 22, a stirring motor 23, a stirring shaft 24, a stirring rod 25, a low-temperature heater 26, an extract inlet 27 and a feed door 28. The extraction chamber shell 21 is a barrel-shaped structure with a top cover. The feed port 22 is arranged on the upper side of the extraction chamber shell 21. The feed door 28 is arranged at the feed port 22. A sealing design is adopted between the feed door 28 and the feed port 22. When the feed door 28 is closed, there is no gap between the feed port 22 and the feed door 28. The extract inlet 27 is arranged on the top cover of the extraction chamber shell 21, and the stirring motor 23 is arranged at the center position outside the top cover of the extraction chamber shell 21. One end of the stirring shaft 24 is arranged inside the extraction chamber shell 21 and connected to the center point of the stirring rod 25, and the other end passes through the top cover of the extraction chamber shell 21 and is connected to the stirring motor 23. The stirring rod 25 is arranged near the bottom of the extraction chamber housing 21. The stirring rod 25 and the bottom of the extraction chamber housing 21 are both arranged horizontally. The bottom of the extraction chamber housing 21 is not in direct contact with the stirring rod 25, and there is a gap between them. The low-temperature heater 26 is arranged below the outer side of the bottom of the extraction chamber housing 21. The heating temperature of the low-temperature heater 21 is 350-550°C.

[0033] The purification channel 3 includes a purification pipeline 31, a purification pump 32, a filter 33 and a purification switch valve 34. One end of the purification pipeline 31 is connected to the lower side of the extraction chamber housing 21 and communicates with the extraction chamber 2, and the other end is arranged at the top of the evaporation chamber 4 and communicates with the evaporation chamber 4. The purification pump 32 is arranged on the purification pipeline 31, close to one end of the lower side of the extraction chamber housing 21, and the purification pump 32 is arranged outside the extraction chamber 2. The purification switch valve 34 is arranged on one end of the purification pipeline 31 close to the top of the evaporation chamber 4, and the filter 33 is arranged on the purification pipeline 31, between the purification pump 32 and the purification switch valve 34.

[0034] like Figure 2As shown, the filter 33 includes a filter inlet 331, a filter outlet 332, a filter element 333 and a filter housing 334. The filter inlet 331 is arranged on a side of the filter 33 close to the purification pump 32, and the filter outlet 332 is arranged on a side of the filter 33 close to the purification switch valve 34. The filter inlet 331 and the filter outlet 332 are both on the purification pipeline 31. A filter housing 334 is arranged between the filter inlet 331 and the filter outlet 332. The filter inlet 331 and the filter outlet 332 are connected to the openings on both sides of the filter housing 334. The filter housing 334 is a barrel-shaped structure that is completely sealed except for the openings on both sides. The interior of the filter housing 334 is filled with a filter element 333. The filter element 333 can be a high-temperature resistant filter element such as a titanium rod filter element, a ceramic fiber filter element or a stainless steel mesh filter element.

[0035] The evaporation chamber 4 includes an evaporation chamber shell 41, a material taking port 42, a material taking door 43 and an evaporation heater 44. Figure 1 As shown, the top opening of the evaporation chamber shell 41 is connected to one end of the purification pipeline 31, and the upper side opening of the evaporation chamber shell 41 is connected to the recovery channel 5. The evaporation chamber shell 41 is a tower-like structure that is completely sealed except for the top and upper side openings. The feed port 42 is arranged on the upper side of the bottom of the evaporation chamber shell 41, and the feed door 43 is arranged at the feed port 42. A sealing design is adopted between the feed port 42 and the feed door 43. When the feed door 43 is closed, there is no gap between the feed port 42 and the feed door 43. The evaporation heater 44 is arranged on the outer side of the bottom surface of the evaporation chamber shell 41, and the heating temperature of the evaporation heater is 80-85°C.

[0036] The recovery channel 5 includes a recovery pipeline 51, a recovery container 52, a condenser 53, and a recovery switch valve 54. One end of the recovery pipeline 51 is connected to the upper side opening of the evaporation chamber shell 41, and the other end is connected to the extract inlet 27 of the extraction chamber 2. The recovery container 52 is arranged on the recovery pipeline 51, close to the side of the feed port 22, and the inlet and outlet of the recovery container 52 are both on the recovery pipeline 51. The inlet of the recovery container 52 can be arranged vertically or horizontally, which is not limited in this scheme. The outlet of the recovery container 52 is arranged vertically. A condenser 53 is arranged inside the recovery container 52. The condenser 53 is arranged at a position near the inlet of the recovery container 52 inside the recovery container 52. The condenser 53 can be a spiral plate condenser, a shell and tube condenser, a plate condenser or a sleeve condenser. A recovery switch valve 54 is arranged below the recovery container 52, above the connection position of the recovery pipeline 51 and the extract inlet 27.

[0037] The recovery container 52 contains the extract 6, which may be tetrahydrofuran solvent, cyclohexanone solvent, pyridine solvent, N-methylpyrrolidone solvent, carbon disulfide solvent, toluene solvent, ethanol solvent, or a mixed solvent of two or more thereof.

[0038] Taking the extract 6 as N-methylpyrrolidone solvent as an example, the purification process of a hard carbon raw material purification device of the utility model is as follows:

[0039] The feed gate 28 is opened, and the ground hard carbon raw material is fed into the extraction chamber 2 through the feeder 1 via the feed port 22, and then the feed gate 28 is closed. The recovery switch valve 54 is opened to release the extract 6 in the recovery container 52 into the extraction chamber 2 to mix with the hard carbon raw material in the extraction chamber 2, and then the recovery switch valve 54 is closed. The stirring motor 23 drives the stirring shaft 24 and the stirring rod 25 to stir the extract 6 of the mixed raw material. After stopping the stirring, the low-temperature heater 26 is turned on to heat the extract 6 to a temperature of 350-550°C for heating reaction so that the coal in the raw material is fully dissolved in the extract 6.

[0040] The low-temperature heater 26 is turned off, the purification switch valve 34 is opened, and the extraction liquid 6 after the heating reaction is extracted by the purification pump 32 and sent to the evaporation chamber 4. During the extraction process, the ash and minerals in the extraction liquid 6 that cannot be dissolved in the extraction liquid are filtered out by the filter 33.

[0041] The purification switch valve 34 is closed, and the evaporation heater 44 is turned on to heat the filtered extract 6 to a temperature of 80-85°C. The extract 6 is evaporated, and what remains is ultra-pure coal (UCC), that is, a purified high-quality hard carbon raw material.

[0042] The extract 6 enters the recovery channel 5 under the action of evaporation, and is re-condensed and gathered in the recovery container 52 under the action of the condenser 53. The recovered extract 6 can be used for the next raw material purification process.

[0043] Afterwards, the evaporated hard carbon raw material is taken out from the evaporation chamber 4 through the material taking port 42, and the taken out hard carbon raw material is washed, evaporated and carbonized for multiple times to obtain a high-purity hard carbon material.

[0044] The hard carbon raw material purification device provided by the utility model can effectively prepare hard carbon raw materials from low-ash coal. The raw materials purified by the utility model can be washed, evaporated and carbonized at high temperature for multiple times to obtain high-purity hard carbon materials. In addition, the integrated design of the hard carbon raw material purification device of the utility model simplifies the purification process of the hard carbon raw materials and simplifies the operation process. At the same time, the chemical reagents used to extract the low-ash coal can be recycled, which reduces chemical pollution and reduces the purification cost.

[0045] The above content is an explanation of the preferred embodiments of the present invention, which can help those skilled in the art to more fully understand the technical solution of the present invention. However, these embodiments are merely illustrative, and it cannot be determined that the specific implementation methods of the present invention are limited to the description of these embodiments. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make some simple deductions and transformations, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A hard carbon raw material purification device, characterized in that: It includes a feeder, an extraction chamber, a purification channel, an evaporation chamber and a recovery channel; the feeder is arranged above the extraction chamber; one end of the purification channel is arranged below the extraction chamber, and the other end is connected to the top of the evaporation chamber, and a filter is provided at one end of the purification channel close to the evaporation chamber; one end of the recovery channel is connected to the upper part of the evaporation chamber, and the other end is connected to the extract inlet of the extraction chamber.

2. A hard carbon raw material purification device according to claim 1, characterized in that: The extraction chamber comprises: an extraction chamber shell, a feed port, a stirring motor, a stirring shaft, a stirring rod low-temperature heater, an extraction liquid inlet and a feed door; the feed port is arranged on the upper side of the extraction chamber, the feed door is arranged at the feed port, and a sealing design is adopted between the feed door and the feed port; the extraction liquid inlet is arranged on the top cover of the extraction chamber shell, and the stirring motor is arranged at the center position of the outer side of the top cover of the extraction chamber; one end of the stirring shaft is arranged inside the extraction chamber and connected with the center point of the stirring rod, and the other end passes through the top cover of the extraction chamber and is connected with the stirring motor; the stirring rod is arranged at a position close to the bottom surface of the extraction chamber shell, the stirring rod and the bottom surface of the extraction chamber shell are both arranged horizontally, and there is a gap between the bottom surface of the extraction chamber shell and the stirring rod; the low-temperature heater is arranged below the outer side of the bottom surface of the extraction chamber shell.

3. A hard carbon raw material purification device according to claim 1 or 2, characterized in that: The feeder is arranged at the feed inlet above the extraction chamber.

4. A hard carbon raw material purification device according to claim 1, characterized in that: The purification channel includes a purification pipeline, a purification pump, a filter and a purification switch valve; the purification pump, the filter and the purification switch valve are all arranged on the purification pipeline, the purification pump is arranged on the side of the purification pipeline close to the extraction chamber, the purification switch valve is arranged on the side of the purification pipeline close to the evaporation chamber, and the filter is arranged between the purification pump and the purification switch valve.

5. A hard carbon raw material purification device according to claim 4, characterized in that: The filter comprises a filter inlet, a filter outlet, a filter element and a filter housing, wherein the filter housing is arranged between the filter inlet and the filter outlet; the filter inlet and the filter outlet are connected with openings on both sides of the filter housing, the filter housing is a barrel-shaped structure which is completely sealed except for the openings on both sides, and the interior of the filter housing is filled with the filter element.

6. A hard carbon raw material purification device according to claim 5, characterized in that: The filter element is a titanium rod filter element, a ceramic fiber filter element or a stainless steel mesh filter element.

7. A hard carbon raw material purification device according to claim 1, characterized in that: The evaporation chamber includes an evaporation chamber shell, a material collection port, a material collection door and an evaporation heater; the evaporation chamber shell is a tower-shaped structure that is completely sealed except for the top surface and the upper side openings, the material collection port is arranged on the upper side of the bottom of the evaporation chamber shell, the evaporation heater is arranged on the outer side of the bottom surface of the evaporation chamber shell, the material collection door is arranged at the material collection port, and a sealing design is adopted between the material collection port and the material collection door.

8. A hard carbon raw material purification device according to claim 7, characterized in that: A sealing design is adopted between the material taking port and the evaporation chamber shell.

9. A hard carbon raw material purification device according to claim 1, characterized in that: The recovery channel includes a recovery pipeline, a recovery container, a condenser, and a recovery switch valve; the recovery container and the recovery switch valve are both arranged on the recovery pipeline, the recovery switch valve is arranged on a side of the recovery pipeline close to the extraction liquid inlet, the recovery container is arranged on the recovery pipeline above the recovery switch valve, the condenser is arranged inside the recovery container, and the extraction liquid is contained in the collection container.

10. A hard carbon raw material purification device according to claim 9, characterized in that: The condenser is a spiral plate condenser, a shell and tube condenser, a plate condenser or a sleeve and tube condenser.

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