CN117732412A

CN117732412A - Hard carbon negative electrode material purification equipment and preparation method

Info

Publication number: CN117732412A
Application number: CN202311535378.7A
Authority: CN
Inventors: 潘新华
Original assignee: Shengdi New Materials Changxing Co ltd
Current assignee: Shengdi New Materials Changxing Co ltd
Priority date: 2023-11-17
Filing date: 2023-11-17
Publication date: 2024-03-22

Abstract

The invention discloses a hard carbon negative electrode material purifying device and a preparation method, and aims to provide the hard carbon negative electrode material purifying device and the preparation method which are suitable for continuous processing, improve the production efficiency and effect, and are convenient to maintain so as to prolong the service life. The device comprises a cooling box, wherein both sides of the cooling box are connected with a heating reaction box, the upper end of the heating reaction box is connected with a quantitative mechanism, the lower end of the heating reaction box is connected with an auxiliary reaction mechanism, the upper end of the cooling box is connected with a circulating cooling mechanism, the lower end of the cooling box is connected with a filtering box, a material box is disassembled and connected in the filtering box, and a vacuumizing mechanism and an exhaust mechanism are connected on the filtering box. The beneficial effects of the invention are as follows: the continuous and batch processing is convenient; the production efficiency and the effect are improved; the structure is compact; the disassembly and maintenance are convenient, and the service life is prolonged; automatic quantitative feeding is realized, and control is convenient; the operation convenience and the connection stability between structures are improved; is convenient for batch material storage and taking.

Description

Hard carbon negative electrode material purification equipment and preparation method

Technical Field

The invention relates to the technical field of carbon powder preparation and production, in particular to a hard carbon negative electrode material purification device and a preparation method.

Background

Amorphous carbon materials, i.e., carbon materials without fixed crystalline shapes, mainly include soft carbon and hard carbon, and hard carbon negative electrode materials currently mainly include resin carbons (e.g., phenolic resins, epoxy resins, etc.), organic polymer pyrolytic carbons (e.g., PFA, PVC, PVDF, etc.), carbon blacks, biomass carbons, etc. Compared with graphite negative electrode materials, the hard carbon negative electrode material has the advantages of high reversible specific capacity, excellent multiplying power characteristics, good low-temperature performance, high charge and discharge speed, high safety, long service life and obvious performance advantage. In order to improve the product performance, carbon powder is one of the main materials for producing hard carbon at present, and when a hard carbon negative electrode material is used as a negative electrode material of a lithium battery, the cost is high and the pollution is large when the carbon powder for producing the hard carbon negative electrode material is produced at present, so how to reduce the production cost and the environmental pollution is one of the important research directions of the industry.

Chinese patent grant bulletin number: the invention discloses a preparation method and a device of carbon powder for a hard carbon negative electrode material, CN 115709982B and 2023/06/27/grant bulletin date, wherein the preparation method comprises the following steps: s1: vacuumizing the reaction chamber to absolute pressure below 500 Pa; s2: the reaction chamber is quickly heated to 1000-1150 ℃ and the absolute pressure is controlled below 1000 Pa; s3: maintaining the temperature of the reaction chamber at 1000-1150 ℃, introducing natural gas, and controlling the absolute pressure at 2000-10000Pa to obtain carbon-containing powder mixed gas; s4: cooling the mixed gas containing carbon powder; s5: filtering the cooled carbon-containing powder mixed gas to perform solid-gas separation, and purifying the collected solid to obtain carbon powder for the hard carbon negative electrode material. The technical scheme has the following defects: 1. in the structure, the carbon powder deposition chamber is difficult to continuously and quantitatively operate during charging operation, and the processing efficiency and the purification precision are affected; 2. the structure is complicated, the dispersion is carried out, the production flow is single, and the continuous processing is difficult to be suitable for; 3. the structure is damaged and is difficult to maintain in the processing, and the service life of the device is influenced, so that the construction period is prolonged, and the efficiency is reduced.

In summary, the structure in the device is not suitable for continuous processing, affects the production efficiency and the effect, and affects the service life due to difficult maintenance and disassembly.

Disclosure of Invention

The invention provides a device for purifying a hard carbon negative electrode material and a preparation method thereof, which are suitable for continuous processing, improve the production efficiency and effect, facilitate maintenance and prolong the service life, and overcome the defects that the structure in the device in the prior art is not suitable for continuous processing, affects the production efficiency and effect, and is difficult to maintain and disassemble and affects the service life.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a hard carbon negative pole material purification equipment, includes the cooling tank, and the both sides of cooling tank all are connected with the heating reaction case, and the heating reaction case upper end is connected with quantitative mechanism, and the heating reaction case lower extreme is connected with auxiliary reaction mechanism, and the upper end of cooling tank is connected with circulation cooling mechanism, and the lower extreme of cooling tank is connected with the rose box, and the dismantlement is connected with the material box in the rose box, is connected with evacuation mechanism and exhaust mechanism on the rose box.

The heating reaction box, the cooling box and the filter box are all communicated with the vacuumizing mechanism switch, so that the space in each box body can be pumped to absolute pressure below 500Pa through the vacuumizing mechanism, the heating reaction box is arranged on two sides of the pressure cooling box, the heating reaction box is further vacuumized, the heating reaction box is internally required to be vacuumized, heated and externally connected with a procedure for continuously pressurizing natural gas pipeline for air entrainment, at least double-station work can be performed, the production efficiency is improved, and in addition, the heating reaction box is connected with the quantifying mechanism for quantitatively feeding materials for the heating reaction box through the quantifying mechanism, so that the purification operation can be continuously performed. The heating reaction box is connected with a circulating cooling mechanism, and is used for cooling heated gas-mixed carbon powder, the mechanism can be continuously cooled in a circulating cooling mode to operate in cooperation with double-station operation, so that production efficiency is guaranteed, cooled gas-mixed carbon powder is subjected to solid-gas separation through a material box and an exhaust mechanism by entering the filtering box, timely exhaust of the exhaust mechanism is smooth in production, the connected material box is convenient to continuously store and take materials in batches, and meanwhile, later maintenance can be detached to prevent the influence on continuous work caused by filtration efficiency reduction. The device has the advantages of being convenient for continuous and batch processing, improving production efficiency and effect, having compact structure, being convenient for disassembly and maintenance and prolonging service life.

Preferably, the quantitative mechanism comprises a storage box and a flow channel, wherein a discharge hole is formed in the lower end of the storage box, a feed hole is formed in the upper end of the heating reaction box, the upper end of the flow channel is connected with the discharge hole, the lower end of the flow channel is connected with the feed hole, a control block is arranged in the flow channel, a moving mechanism is connected to the storage box, a moving rod is arranged on the control block, the lower end of the moving rod is connected with the control block, the upper end of the moving rod is in sealing connection with the storage box, the moving rod is connected with the moving mechanism, and the control block is in sliding connection with the flow channel through the moving mechanism. The quantitative mechanism comprises a storage box and a fluent channel, wherein the storage box is arranged above the heating reaction box and utilizes gravity for discharging, the upper end of the flow channel is communicated with the storage box through a feeding hole, the lower end of the flow channel is communicated with the heating reaction box through a feeding hole, meanwhile, a control block attached to the inner wall is arranged in the flow channel, the control block is attached to the inner wall of the flow channel, the movable rod is connected with the control block through one end, the other end of the movable rod is connected with the movable mechanism, the control block can be arranged in the flow channel and enter the heating reaction box, and then quantitative feeding is carried out on the heating reaction box by switching on and off the time of the flow channel and the switch. The effects of automatic quantitative feeding, convenient control and operation and production efficiency improvement are achieved.

As the preference, dismantle on the heating reaction box and be connected with the upper cover, flow channel and upper cover sealing connection, heating reaction box external connection has the heat preservation, is equipped with heating pipe assembly on the heating reaction box, is equipped with in the heating reaction box and keeps off the material baffle, keeps off and is equipped with between material baffle and the heating reaction box inner wall and places the chamber, and heating pipe assembly includes a plurality of heating pipes and mount pad, and the mount pad is connected with the upper cover, and the heating pipe is connected with the mount pad and is placed in and place the intracavity, and the heating pipe is evenly bad around arranging in placing the intracavity. The heat insulation layer is wrapped outside the heating reaction box, the temperature in the heating reaction box is more constant through the heat insulation layer, and meanwhile, the heat insulation is carried out at multiple stations, so that the processing rhythm is convenient to control. The heating reaction box is provided with a heating pipe component composed of a mounting seat and a heating pipe, the heating pipe is arranged between the baffle plate in the box and the inner wall of the box, so that the heating pipe is protected from carbon powder interference through the baffle plate, the service life is prolonged, and meanwhile, the mounting seat of the heating pipe is connected with the detachable upper cover, so that the heating pipe which is easy to damage relatively is convenient to replace so as to maintain the heating temperature and efficiency. The effects of convenient disassembly and maintenance, prolonged service life and production efficiency are achieved.

Preferably, the lower extreme that heats reverse case is equipped with the mixed gas hole, be connected with the guide ring in the heating reaction case, the lower terminal surface and the heating reaction case of guide ring are connected, the up end of guide ring is the inclined plane form of inwards slope from circumference to hole, the hole and the mixed gas hole of guide ring coincide mutually and arrange, auxiliary reaction mechanism includes a fixed section of thick bamboo, rotary drum and control assembly, fixed section of thick bamboo is pegged graft mutually with the mixed gas hole, control assembly is connected with a fixed section of thick bamboo, the rotary drum is arranged in a fixed section of thick bamboo and is cup jointed with a fixed section of thick bamboo, the upper end of a fixed section of thick bamboo is equipped with inlet first, the upper end of rotary drum is equipped with inlet second, inlet first and inlet second's position looks adaptation, the rotary drum cup joints with a fixed section of thick bamboo through control assembly. The lower extreme of heating reaction case is equipped with the mixed gas hole, and the structural shape of guide ring is that up end is inside hole slope, lower terminal surface and the interior bottom surface of heating reaction case are connected, and guide ring hole and mixed venthole coaxial footpath are arranged simultaneously, thereby prevent that the material from piling up in the heating reaction case and be convenient for the guide, make whole material get into the cooling tank fast. The auxiliary reaction mechanism is used for enabling materials to be produced in the reaction, wherein the fixed cylinder is connected to the mixed gas outlet hole, a part of end is exposed up and down, the upper end part is provided with a first inlet hole, the rotatable rotary cylinder in the fixed cylinder is provided with a second inlet hole, and when the first inlet hole and the second inlet hole are communicated with the cooling box and the heating reaction box and are staggered, the materials are cut off, and further the materials entering the mixed gas outlet hole before full reaction are prevented from not participating in the reaction, so that the quality and the use effect of the product are influenced by the non-uniformity of reacted carbon powder. The effect of guaranteeing production efficiency and production quality is achieved.

Preferably, a first pipeline is arranged between the heating reaction box and the cooling box, a first switch valve is connected to the first pipeline, one side of the first pipeline is in sealing connection with the lower end of the fixed cylinder, the other side of the first pipeline is in sealing connection with the cooling box, a limiting ring is sleeved on the rotary cylinder, a limiting groove is formed in the fixed cylinder, the limiting ring is in scarf joint with the limiting groove, the lower end of the rotary cylinder is arranged in a cavity of the first pipeline, the control assembly comprises a push block, a push rod and a reset spring, one end of the push rod is arranged outside the first pipeline and in sealing connection with the first pipeline, the other end of the push rod is connected with the push block, the reset spring is sleeved with the push rod, a gear ring is sleeved on the rotary cylinder, a rack is connected to the push block, and the rack is meshed with the gear ring. The heating reaction box is communicated with the cooling box through the first pipeline, the first pipeline of the switching valve is opened and closed, the rotary drum is arranged on the lower end part of the first pipeline, the gear ring is fixedly sleeved on the outer side of the rotary drum, the rotary drum is controlled to rotate in the fixed drum through the rotating gear ring, the rack is meshed with the gear ring, the rotary drum is controlled to rotate through pushing the push rod and the push block, the rotary drum is reset by the cooperation of the reset spring, the rotary drum is reset to realize reciprocating rotation of the rotary drum, the switch between the cooling box and the heating reaction box is further operated conveniently, the rotary drum is limited in the limiting groove through the limiting ring, vertical relative displacement between the rotary drum and the fixed drum is prevented, and stability between structures is improved. The effects of improving the operation convenience and the connection stability between structures are achieved.

Preferably, the circulating cooling mechanism comprises a water inlet tank, a water outlet tank and a distributing pipe, the distributing pipe is in a U-shaped structure, a water inlet hole and a water outlet hole are formed in the cooling tank, the water inlet hole at one end of the distributing pipe is in sealing connection with the water inlet tank, and the other end of the distributing pipe is in sealing connection with the water outlet hole and is connected with the water outlet tank. In the circulation cooling mechanism, continuous water inflow is provided for the distributing pipe through the water inlet tank for cooling, and the water outlet tank discharges flowing water after cooling circulation, so that the cooling efficiency and the efficiency are continuous, and the U-shaped pipe structure is compact in structure and high in cooling efficiency. The effect of further improving the structural compactness and the cooling efficiency and facilitating continuous production is achieved.

Preferably, a second pipeline is arranged between the filter tank and the cooling tank, a second switching valve is connected to the second pipeline, one end of the second pipeline is connected with the cooling tank in a sealing mode, the other end of the second pipeline is connected with the filter tank in a sealing mode, a lower cover is connected in the filter tank in a detachable mode, a third pipeline and a fourth pipeline are connected to the filter tank, the third pipeline is connected with the vacuumizing mechanism in a sealing mode, the fourth pipeline is connected with the exhausting mechanism in a sealing mode, and the vacuumizing mechanism and the exhausting mechanism are all arranged on one side, close to the lower cover, of the material box. The filter box is connected with the cooling box through a second pipeline, the second switch valve controls the connection and closing of the second pipeline, the second pipeline is at least provided with a pair of pipelines so as to improve the efficiency of outputting the carbon powder gas mixture into the filter box, the lower cover is detached and connected in the filter box, the material box is conveniently taken out through the lower cover, the vacuumizing mechanism and the exhaust mechanism are arranged on one side close to the lower cover, and carbon powder is prevented from finally entering the vacuumizing mechanism and the exhaust mechanism through the third pipeline and the fourth pipeline. The effects of improving production efficiency, guaranteeing structure continuous work and convenient disassembly and maintenance are achieved.

Preferably, the material box comprises a fixed plate, a connecting frame and a filter screen, wherein the filter screen is connected with the inner side of the connecting frame, a positioning groove is formed in the filter box, the lower end of the fixed plate is connected with the upper end of the connecting frame, the upper end of the fixed plate is connected with the positioning groove in an inserting mode, the lower cover is connected with the filter box in a disassembling mode, and the upper end of the lower cover is connected with a push rod which abuts against the lower end of the connecting frame. The material box is enclosed to be the frame dress structure through the fixed plate in, and the filter screen is connected through the one end of connecting frame with the fixed plate, carries out the separation of gas and carbon dust through the filter screen, and the other end and the constant head tank of fixed plate peg graft mutually, make the material box can fix a position the installation fast, and the lower cover is fixed the material box through the ejector pin when the installation is fixed, prevents that the material box from removing, can dismantle simultaneously when dismantling to get material maintenance fast. The effects of convenient batch material storage, material taking, disassembly and maintenance are achieved.

Preferably, the lower cover is in threaded connection with the filter box, the filter box is sleeved with a fixing ring, the fixing ring is provided with a yielding groove, a sealing ring is arranged in the yielding groove, the sealing ring is sleeved with the filter box, and the lower cover is in pressure connection with the sealing ring. The structure shape of the filter box is a cylindrical structure, the filter box is sleeved with a fixed ring, and the lower cover is in compression joint with the sealing ring in a yielding groove on the fixed ring when in threaded connection with the filter box, so that the tightness is increased. The effect of improving the assembly and disassembly convenience and improving the air tightness is achieved.

The invention also provides a method for purifying and preparing the hard carbon anode material, which comprises the following steps:

step one: quantitatively feeding materials to the heating reaction box through the quantitative mechanism, opening a pipeline, pressurizing through the vacuumizing mechanism, and closing the pipeline;

step two: heating the heating reaction box by a heating pipe, keeping the temperature of the heat preservation layer, adding natural gas for pressurizing and reacting to obtain carbon powder mixed gas;

step three: opening a circulating cooling mechanism, opening a pipeline, enabling carbon powder mixed gas to enter a cooling box through an auxiliary reaction mechanism for cooling, and simultaneously starting another group of quantitative feeding and pressurizing and heating reaction;

step four: and opening a pipeline of the filter box after cooling, enabling carbon powder to enter the material box, enabling gas to enter the exhaust mechanism to finish carbon powder and gas separation, and taking out the material box to obtain purified carbon powder.

Starting the moving mechanism to move the moving rod downwards, enabling the control block to enter the heating reaction box, enabling the flow channel to vacate the material and flow into the heating reaction box, and moving the moving mechanism reversely to reset the control block and stop the feeding amount, so as to finish quantitative feeding. And opening the third pipeline, the second pipeline and the first pipeline, and pressurizing the filter box, the cooling box and the heating reaction box through the vacuumizing mechanism. And starting the heating pipe to heat and continuously pressurize the material. The heat preservation layer is used for preserving heat of the heating reaction box, and natural gas is introduced into the heating reaction box through the natural gas pipeline channel to continuously pressurize the heating reaction box so as to obtain carbon powder mixed gas.

Opening a first switching valve of a pipeline I, pressing a push rod, enabling a rack to rotate in engagement with a gear ring, enabling a rotary drum to rotate, enabling a first inlet hole to be opposite to a second inlet hole, enabling carbon powder mixed gas to enter a cooling box through the first pipeline, loosening the push rod after entering, enabling the first inlet hole to be staggered with the second inlet hole, closing the first switching valve, opening the switching valves on the water inlet box and the water outlet box to enable water flow to flow on a distributing pipe, and enabling the carbon powder mixed gas to enter to be cooled.

Opening a second switch valve to enable the second pipeline to be communicated with the filter tank, opening an exhaust mechanism, enabling cooled carbon powder mixed gas to enter the filter tank, wherein carbon powder is blocked by a filter screen, enabling gas to be discharged outside through the exhaust mechanism, continuously feeding, vacuumizing, pressurizing and continuously working in a heating process by opening a quantifying mechanism on other heating reaction tanks, enabling carbon powder to be continuously accumulated in a material box, opening a lower cover, and taking out the material box to obtain a purified cathode material. So as to realize continuous quantitative batch processing production.

The beneficial effects of the invention are as follows: the continuous and batch processing is convenient; the production efficiency and the effect are improved; the structure is compact; the disassembly and maintenance are convenient, and the service life is prolonged; automatic quantitative feeding is realized, and control is convenient; the operation convenience and the connection stability between structures are improved; is convenient for batch material storage and taking.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a cross-sectional view of the heating reaction chamber connected to the dosing mechanism;

fig. 4 is an enlarged view at a in fig. 2;

FIG. 5 is a cross-sectional view of the inlet tank connected to the cooling tank;

FIG. 6 is a cross-sectional view of the connection of the outlet tank to the cooling tank;

FIG. 7 is a schematic diagram of the connection of the recirculating cooling mechanism to the cooling tank;

fig. 8 is a cross-sectional view of the filter box.

In the figure: 1. a cooling tank, 2, heating reaction tank, 3, dosing mechanism, 4, auxiliary reaction mechanism, 5, circulating cooling mechanism, 6, filter tank, 7, cartridge, 8, vacuum pumping mechanism, 9, exhaust mechanism, 10, storage tank, 11, flow channel, 12, discharge orifice, 13, feed orifice, 14, feed orifice, 15, control block, 16, moving mechanism, 17, moving rod, 18, upper cover, 19, heat insulating layer, 20, baffle, 21, placement cavity, 22, heating pipe, 23, mounting seat, 24, mixed gas outlet, 25, guide ring, 26, fixed cylinder, 27, rotary drum, 28, control assembly, 29, first inlet orifice, 30, second inlet orifice, 31, first conduit, 32, switch valve, 33, stop ring, 34, limit groove, 35, push block, 36, push rod, 37, return spring, 38, gear ring, 39, 40, water inlet tank, 41, 42, 43, water inlet orifice, 44, water outlet orifice, 45, second conduit, 46, switch gear, 48, third conduit, 48, guide ring, 53, fixed conduit, 48, and sealing ring, 53, and fixed channel, 53, and sealing ring.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "on" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise fixed (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, processes and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

Example 1:

as shown in fig. 1 and 2, the hard carbon negative electrode material purifying device comprises a cooling box 1, wherein both sides of the cooling box 1 are respectively connected with a heating reaction box 2, the upper end of the heating reaction box 2 is connected with a quantifying mechanism 3, the lower end of the heating reaction box 2 is connected with an auxiliary reaction mechanism 4, the upper end of the cooling box 1 is connected with a circulating cooling mechanism 5, the lower end of the cooling box 1 is connected with a filtering box 6, a material box 7 is detachably connected in the filtering box 6, and a vacuumizing mechanism 8 and an exhaust mechanism 9 are connected on the filtering box 6.

As shown in fig. 2-4, the dosing mechanism 3 comprises a storage box 10 and a flow channel 11, a discharge hole 12 is arranged at the lower end of the storage box 10, a feed hole 13 is arranged at the upper end of the storage box 10, a feed hole 14 is arranged at the upper end of the heating reaction box 2, the upper end of the flow channel 11 is connected with the discharge hole 12, the lower end of the flow channel 11 is connected with the feed hole 14, a control block 15 is arranged in the flow channel 11, a moving mechanism 16 is connected to the storage box 10, a moving rod 17 is arranged on the control block 15, the lower end of the moving rod 17 is connected with the control block 15, the upper end of the moving rod 17 is in sealing connection with the storage box 10, the moving rod 17 is connected with the moving mechanism 16, and the control block 15 is in sliding connection with the flow channel 11 through the moving mechanism 16.

As shown in fig. 1-3, the heating reaction box 2 is detachably connected with an upper cover 18, the flow channel 11 is in sealing connection with the upper cover 18, the heating reaction box 2 is externally connected with a heat insulation layer 19, a heating pipe assembly is arranged on the heating reaction box 2, a material blocking partition plate 20 is arranged in the heating reaction box 2, a placing cavity 21 is arranged between the material blocking partition plate 20 and the inner wall of the heating reaction box 2, the heating pipe assembly comprises a plurality of heating pipes 22 and mounting seats 23, the mounting seats 23 are connected with the upper cover 18, the heating pipes 22 are connected with the mounting seats 23 and are placed in the placing cavity 21, and the heating pipes 22 are uniformly arranged in a broken winding way in the placing cavity 21.

As shown in fig. 2 and 3, the lower end of the heating reaction box 2 is provided with a mixed gas outlet 24, the heating reaction box 2 is internally connected with a guide ring 25, the lower end surface of the guide ring 25 is connected with the heating reaction box 2, the upper end surface of the guide ring 25 is in an inward inclined slope shape from the circumference to the inner hole, the inner hole of the guide ring 25 is overlapped with the mixed gas outlet 24, the auxiliary reaction mechanism 4 comprises a fixed cylinder 26, a rotary cylinder 27 and a control assembly 28, the fixed cylinder 26 is spliced with the mixed gas outlet 24, the control assembly 28 is connected with the fixed cylinder 26, the rotary cylinder 27 is arranged in the fixed cylinder 26 and sleeved with the fixed cylinder 26, the upper end of the fixed cylinder 26 is provided with a first inlet hole 29, the upper end of the rotary cylinder 27 is provided with a second inlet hole 30, the positions of the first inlet hole 29 and the second inlet hole 30 are matched, and the rotary cylinder 27 is sleeved with the fixed cylinder 26 through the control assembly 28.

As shown in fig. 2 and 3, a first pipeline 31 is arranged between the heating reaction box 2 and the cooling box 1, a first switch valve 32 is connected to the first pipeline 31, one side of the first pipeline 31 is in sealing connection with the lower end of the fixed cylinder 26, the other side of the first pipeline 31 is in sealing connection with the cooling box 1, a limiting ring 33 is sleeved on the rotary cylinder 27, a limiting groove 34 is arranged on the fixed cylinder 26, the limiting ring 33 is in scarf joint with the limiting groove 34, the lower end of the rotary cylinder 27 is arranged in a cavity of the first pipeline 31, the control assembly 28 comprises a push block 35, a push rod 36 and a return spring 37, one end of the push rod 36 is arranged outside the first pipeline 31 and in sealing connection with the first pipeline 31, the other end of the push rod 36 is connected with the push block 35, the return spring 37 is sleeved with the push rod 36, a gear ring 38 is sleeved on the rotary cylinder 27, a rack 39 is connected to the push block 35, and the rack 39 is in meshing connection with the gear ring 38.

As shown in fig. 2, 5, 6 and 7, the circulation cooling mechanism 5 comprises a water inlet tank 40, a water outlet tank 41 and a distribution pipe 42, the distribution pipe 42 is in a U-shaped pipe, a water inlet hole 43 and a water outlet hole 44 are arranged on the cooling tank 1, the water inlet hole 43 at one end of the distribution pipe 42 is in sealing connection with the water inlet tank 40, and the other end of the distribution pipe 42 is in sealing connection with the water outlet hole 44 and is connected with the water outlet tank 41.

As shown in fig. 2 and 8, a second pipeline 45 is arranged between the filter box 6 and the cooling box 1, a second switch valve 46 is connected to the second pipeline 45, one end of the second pipeline 45 is connected with the cooling box 1 in a sealing manner, the other end of the second pipeline 45 is connected with the filter box 6 in a sealing manner, a lower cover 47 is connected in the filter box 6 in a disassembling manner, a third pipeline 48 and a fourth pipeline 49 are connected to the filter box 6 in a sealing manner, the third pipeline 48 is connected with the vacuumizing mechanism 8 in a sealing manner, the fourth pipeline 49 is connected with the exhausting mechanism 9 in a sealing manner, and the vacuumizing mechanism 8 and the exhausting mechanism 9 are both arranged on one side, close to the lower cover 47, of the material box 7.

As shown in fig. 8, the material box 7 comprises a fixing plate 53, a connecting frame 50 and a filter screen 51, the filter screen 51 is connected with the inner side of the connecting frame 50, a positioning groove 52 is arranged on the filter box 6, the lower end of the fixing plate 53 is connected with the upper end of the connecting frame 50, the upper end of the fixing plate 53 is inserted into the positioning groove 52, the lower cover 47 is detachably connected with the filter box 6, the upper end of the lower cover 47 is connected with a push rod 54, and the push rod 54 abuts against the lower end of the connecting frame 50.

As shown in fig. 8, the lower cover 47 is in threaded connection with the filter box 6, a fixing ring 55 is sleeved on the filter box 6, a yielding groove 56 is arranged on the fixing ring 55, a sealing ring 57 is arranged in the yielding groove 56, the sealing ring 57 is sleeved with the filter box 6, and the lower cover 47 is in pressure connection with the sealing ring 57.

As shown in fig. 1-8: the movable rod 17 is connected with a cross rod, so that the movable rod 17 and the cross rod are connected in a T-shaped structure, the movable mechanism 16 is of a telescopic rod structure, and a telescopic part of the movable mechanism 16 is connected to the cross rod to control the movable rod 16 to reciprocate up and down.

The heating reaction boxes 2 are arranged on the opposite side surfaces of the cooling box 1, one heating reaction box 2 is communicated with the vacuumizing mechanism 8 on the filtering box 6, and other vacuumizing mechanisms 8 are independently arranged on other heating reaction boxes 2 so as to facilitate independent pressurization in continuous operation. The sealing connection is tightly connected with the sealing ring by welding, so that the air pressure control is convenient.

The storage tank 10 is internally connected with a guide ring 58, the upper end surface of the guide ring is inclined inwards from the circumference to the inner hole, and the discharge hole 12 and the inner circle of the guide ring 58 are the same diameter and the same axis, so that the material feeding is convenient and accumulation is prevented. The charging hole 13 is used for periodically charging the storage box 10, so as to ensure long-term production requirements.

The upper end face and the lower end face of the control block 15 are both in conical structures, wherein the upper end face prevents the material from staying and the upper end face and the lower end face facilitate the material to flow out. The charging hole 13 is connected with a hole cover plate.

The heating reaction box 2 is connected with the natural gas pipeline channel 59 for externally leading in natural gas, the heat preservation layer 19 is made of heat preservation materials and is in wrapping connection with the box body of the surrounding heating reaction box 2, and the heat preservation layer 19 is provided with the positions and the sizes of the mounting seat 23, the fixing cylinder 26 and the natural gas pipeline channel 59 which are correspondingly adapted, so that the heat preservation layer can be subjected to heat preservation to the maximum extent and is added into the reaction box 2, and rapid temperature rise during continuous working at the later period is facilitated, so that the production efficiency is improved.

The heating pipe 22 passes through the mounting seat 23 and is externally connected with heating equipment, the other end of the heating pipe is placed in the placing cavity 21 for heating, the mounting seat 23 is inserted and mounted with the upper cover 18, the material blocking partition plate 20 is connected to the inner wall of the heating reaction box 2 in a ring shape, and the material blocking partition plate 20 is of a net-shaped structure made of high-temperature resistant materials, so that carbon powder is prevented from entering the placing cavity 21.

Switch valves (not shown) are connected to the third 48, fourth 49, water inlet 40 and water outlet 41 to control the opening and closing of the pipes. A swirl gas port (not shown) is installed at one end of the natural gas pipeline channel 59, which is located in the heating reaction box 2, and natural gas flows in the heating reaction box 2 in a swirling manner under the action of the swirl gas port, so that the utilization rate of the natural gas is improved.

step one: quantitatively feeding materials to the heating reaction box 2 through the quantitative mechanism 3, opening a pipeline, pressurizing through the vacuumizing mechanism 8, and closing the pipeline;

step two: heating the heating reaction box 2 through a heating pipe 22, keeping the temperature of the heat preservation layer 19, adding natural gas for pressurizing and reacting to obtain carbon powder mixed gas;

step three: opening a circulating cooling mechanism 5, opening a pipeline, enabling carbon powder mixed gas to enter the cooling box 1 through the auxiliary reaction mechanism 4 for cooling, and simultaneously starting another group of quantitative feeding and pressurizing heating reaction;

step four: after cooling, the pipeline of the filter box 6 is opened, carbon powder enters the material box 7, gas enters the exhaust mechanism 9 to finish carbon powder and gas separation, and the purified carbon powder is obtained after the material box 7 is taken out.

The specific operation is as follows:

the moving mechanism 16 is started to move the moving rod 17 downwards, the control block 15 enters the heating reaction box 2, the flow channel 11 vacates the material and flows into the heating reaction box 2, the moving mechanism 16 is moved reversely, the control block 15 is reset, the dosing is stopped, and the quantitative dosing is completed. The third pipe 48, the second pipe 45 and the first pipe 31 are opened, and the filtration tank 6, the cooling tank 1 and the heating reaction tank 2 are pressurized by the evacuation mechanism 8. The heating tube 22 is activated to heat and continue to pressurize the material. The heat preservation layer 19 is used for preserving heat of the heating reaction box 2, and natural gas is introduced into the natural gas pipeline channel 59 to continuously pressurize the natural gas so as to obtain carbon powder mixed gas.

Opening a switch valve I32 of a pipeline I31, pressing a push rod 36, enabling a rack 39 to rotate in engagement with a gear ring 38, enabling a rotary drum 27 to rotate, enabling a first inlet 29 and a second inlet 30 to be opposite, enabling carbon powder mixed gas to enter the cooling box 1 through the pipeline I31, loosening the push rod 36 after entering, enabling the first inlet 29 and the second inlet 30 to be staggered, closing the switch valve I32, opening switch valves on a water inlet box 40 and a water outlet box 41 to enable water flow to flow on a distributing pipe 42, and enabling the entering carbon powder mixed gas to be cooled.

Opening the switch valve II 46 to enable the pipeline II 45 to be communicated with the filter box 6, opening the exhaust mechanism 9, enabling cooled carbon powder mixed gas to enter the filter box 6, wherein the carbon powder is blocked by the filter screen 51, enabling the gas to be discharged outside through the exhaust mechanism 9, continuously feeding, vacuumizing, pressurizing and continuously working in a heating process by opening the quantifying mechanism 3 on the other heating reaction box 2, enabling the carbon powder to be continuously accumulated in the material box, opening the lower cover 47, and taking out the material box 7 to obtain purified cathode materials.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a hard carbon negative pole material purification equipment, its characterized in that, including cooling tank (1), the both sides of cooling tank (1) all are connected with heating reaction case (2), heating reaction case (2) upper end is connected with ration mechanism (3), heating reaction case (2) lower extreme is connected with auxiliary reaction mechanism (4), the upper end of cooling tank (1) is connected with circulation cooling mechanism (5), the lower extreme of cooling tank (1) is connected with rose box (6), dismantle in rose box (6) and be connected with material box (7), be connected with evacuation mechanism (8) and exhaust mechanism (9) on rose box (6).

2. The hard carbon negative electrode material purifying device according to claim 1, wherein the quantitative mechanism (3) comprises a storage tank (10) and a flow channel (11), a discharging hole (12) is formed in the lower end of the storage tank (10), a feeding hole (13) is formed in the upper end of the storage tank (10), a feeding hole (14) is formed in the upper end of the heating reaction tank (2), the upper end of the flow channel (11) is connected with the discharging hole (12), the lower end of the flow channel (11) is connected with the feeding hole (14), a control block (15) is arranged in the flow channel (11), a moving mechanism (16) is connected to the storage tank (10), a moving rod (17) is arranged on the control block (15), the lower end of the moving rod (17) is connected with the control block (15), the upper end of the moving rod (17) is connected with the storage tank (10) in a sealing mode, the moving rod (17) is connected with the moving mechanism (16), and the control block (15) is connected with the flow channel (11) in a sliding mode through the moving mechanism (16).

3. The hard carbon negative electrode material purifying device according to claim 2, wherein the heating reaction box (2) is detachably connected with an upper cover (18), the flow channel (11) is in sealing connection with the upper cover (18), the heating reaction box (2) is externally connected with an insulating layer (19), a heating pipe assembly is arranged on the heating reaction box (2), a material blocking partition plate (20) is arranged in the heating reaction box (2), a placing cavity (21) is arranged between the material blocking partition plate (20) and the inner wall of the heating reaction box (2), the heating pipe assembly comprises a plurality of heating pipes (22) and a mounting seat (23), the mounting seat (23) is connected with the upper cover (18), the heating pipes (22) are connected with the mounting seat (23) and are placed in the placing cavity (21), and the heating pipes (22) are uniformly arranged in a bad winding mode in the placing cavity (21).

4. A hard carbon negative electrode material purification device according to claim 3, characterized in that the lower end of the heating reaction box (2) is provided with a mixed gas outlet (24), a guide ring (25) is connected in the heating reaction box (2), the lower end face of the guide ring (25) is connected with the heating reaction box (2), the upper end face of the guide ring (25) is inclined from circumference to inner hole, the inner hole of the guide ring (25) is overlapped with the mixed gas outlet (24), the auxiliary reaction mechanism (4) comprises a fixed barrel (26), a rotary barrel (27) and a control assembly (28), the fixed barrel (26) is spliced with the mixed gas outlet (24), the control assembly (28) is connected with the fixed barrel (26), the rotary barrel (27) is arranged in the fixed barrel (26) and is sleeved with the fixed barrel (26), the upper end of the fixed barrel (26) is provided with a first inlet (29), the upper end of the rotary barrel (27) is provided with a second inlet (30), and the first inlet (29) is matched with the second inlet (28) through the control assembly (30).

5. The hard carbon negative electrode material purifying device according to claim 4, wherein a first pipeline (31) is arranged between the heating reaction box (2) and the cooling box (1), a first switch valve (32) is connected to the first pipeline (31), one side of the first pipeline (31) is in sealing connection with the lower end of the first pipeline (26), the other side of the first pipeline (31) is in sealing connection with the cooling box (1), a limiting ring (33) is sleeved on the rotary drum (27), a limiting groove (34) is formed in the fixed drum (26), the limiting ring (33) is in scarf joint with the limiting groove (34), the lower end of the rotary drum (27) is arranged in a cavity of the first pipeline (31), the control assembly (28) comprises a push block (35), a push rod (36) and a reset spring (37), one end of the push rod (36) is arranged outside the first pipeline (31) and is in sealing connection with the lower end of the first pipeline (31), the other end of the push rod (36) is connected with the push block (35), the reset spring (37) is in contact with the rotary drum (27), and the push rod (36) is in contact with the toothed ring (39), and the toothed ring (39) is sleeved on the rotary drum (38).

6. The hard carbon negative electrode material purifying device according to claim 1 or 5, wherein the circulating cooling mechanism (5) comprises a water inlet tank (40), a water outlet tank (41) and a distribution pipe (42), the distribution pipe (42) is in a U-shaped pipe in structural shape, a water inlet hole (43) and a water outlet hole (44) are arranged on the cooling tank (1), the water inlet hole (43) at one end of the distribution pipe (42) is in sealing connection and is connected with the water inlet tank (40), and the other end of the distribution pipe (42) is in sealing connection with the water outlet hole (44) and is connected with the water outlet tank (41).

7. The hard carbon negative electrode material purifying device according to claim 6, wherein a second pipeline (45) is arranged between the filter tank (6) and the cooling tank (1), a second switch valve (46) is connected to the second pipeline (45), one end of the second pipeline (45) is connected with the cooling tank (1) in a sealing manner, the other end of the second pipeline (45) is connected with the filter tank (6) in a sealing manner, a lower cover (47) is connected in the filter tank (6) in a disassembling manner, a third pipeline (48) and a fourth pipeline (49) are connected to the filter tank (6), the third pipeline (48) is connected with the vacuumizing mechanism (8) in a sealing manner, the fourth pipeline (49) is connected with the exhausting mechanism (9) in a sealing manner, and the vacuumizing mechanism (8) and the exhausting mechanism (9) are both arranged on one side, close to the lower cover (47), of the material box (7).

8. The hard carbon negative electrode material purifying device according to claim 7, wherein the material box (7) comprises a fixed plate (53), a connecting frame (50) and a filter screen (51), the filter screen (51) is connected with the inner side of the connecting frame (50), a positioning groove (52) is formed in the filter box (6), the lower end of the fixed plate (53) is connected with the upper end of the connecting frame (50), the upper end of the fixed plate (53) is spliced with the positioning groove (52), the lower cover (47) is detachably connected with the filter box (6), an ejector rod (54) is connected with the upper end of the lower cover (47), and the ejector rod (54) abuts against the lower end of the connecting frame (50).

9. The hard carbon negative electrode material purification device according to claim 8, wherein the lower cover (47) is in threaded connection with the filter box (6), a fixing ring (55) is sleeved on the filter box (6), a yielding groove (56) is formed in the fixing ring (55), a sealing ring (57) is arranged in the yielding groove (56), the sealing ring (57) is sleeved with the filter box (6), and the lower cover (47) is in pressure connection with the sealing ring (57).

10. The invention also provides a method for purifying and preparing the hard carbon anode material, which is characterized by comprising the following steps:

step one: quantitatively feeding materials to the heating reaction box (2) through the quantitative mechanism (3), opening a pipeline, pressurizing through the vacuumizing mechanism (8), and closing the pipeline;

step two: heating the heating reaction box (2) through a heating pipe (22), keeping the temperature of the heat preservation layer (19), adding natural gas for pressurizing and reacting to obtain carbon powder mixed gas;

step three: opening a circulating cooling mechanism (5), opening a pipeline, enabling carbon powder mixed gas to enter a cooling box (1) through an auxiliary reaction mechanism (4) for cooling, and simultaneously starting another group of quantitative feeding and pressurizing and heating reaction;

step four: and opening a pipeline of the filter box (6) after cooling, enabling carbon powder to enter the material box (7), enabling gas to enter the exhaust mechanism (9) to finish separation of the carbon powder and the gas, and taking out the material box (7) to obtain purified carbon powder.