Granulation system for preparing negative electrode material

Abstract

The utility model relates to the technical field of negative electrode material production, and discloses a granulation system for preparing a negative electrode material. The first container is communicated with the stirring device; a cooling device; the second container is communicated with the cooling device; the inner air entraining pipeline is provided with a first manifold, and the first manifold is communicated with a part of the first containers and the second containers; the outer gas introducing pipeline is provided with a second manifold, and the second manifold is correspondingly communicated with the first manifold and is communicated with the rest of the first container and the second container; an air extractor; the medicine injection opening is formed in the pipeline; an air pump; according to the granulation system for preparing the negative electrode material, provided by the utility model, a set of pipeline system which is communicated with each other is obtained by arranging the inner air guide pipeline and the outer air guide pipeline which are communicated with the first container and the second container, and the medicine injection port, the air exhauster and the air pump are additionally arranged on the pipeline system, so that the granulation system with a self-cleaning mechanism is obtained; the purpose of quickly and simply treating attachments is achieved, and blockage of the tar flue gas pipeline is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technology field of negative material, specifically relates to a granulation system for negative material preparation. BACKGROUND

[0002] In the preparation process of graphite negative material, granulation is one of the key procedures, and the granulation process refers to heating the material according to the set parameters in the case of oxygen isolation after the raw material passes through the powder making procedure and modification procedure, so that the pitch is softened, bonded, coked or the volatile substances in the raw material itself are precipitated, and the process of single particle to secondary particle transformation is completed.

[0003] In the related art, tar fumes are generated in the granulation process, the tar fumes are volatile substances, have strong adhesion, have poor flowability in the pipeline, are prone to stickiness, the liquid tar after cooling is also prone to adhere to the inner wall of the pipeline, after being used for a period of time, the pipeline is prone to be blocked, due to production restrictions, the material of the tar fume pipeline is often carbon steel or stainless steel, so that the overall cost of the tar fume pipeline is high, the pipeline is difficult to replace frequently, and the pipeline is difficult to clean, which greatly affects the production process. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a granulation system for negative material preparation to solve the problem that the tar generated in the granulation process is prone to adhere to the inner wall of the pipeline, and then causes the tar pipeline to be blocked, is difficult to handle and affects production.

[0005] The utility model provides a kind of for negative electrode material preparation's granulating system, comprising: at least two stirring devices;First container, at least two the first container is respectively with the stirring device is communicated by pipeline, it is suitable for respectively receiving from the tar flue gas generated by the stirring device;Cooling device, at least two the cooling device is respectively with the stirring device is communicated by pipeline;Second container, at least two the second container is respectively with the cooling device is communicated by pipeline, it is suitable for respectively receiving from the tar flue gas generated by the cooling device;Sedimentation tank, the first container and the second container are respectively communicated with the sedimentation tank by pipeline;Internal bleed air pipeline, with the sedimentation tank is communicated, the internal bleed air pipeline has at least two first manifold, at least two first manifold is respectively communicated with part the first container and second container;External bleed air pipeline, with the sedimentation tank is communicated, the external bleed air pipeline has at least two second manifold, at least two second manifold is respectively communicated with first manifold correspondence, and at least two second manifold is respectively communicated with the first container and second container remaining;Air extraction device, be located at the internal bleed air pipeline place, it is suitable that the flue gas in the first container and second container is extracted;Injection port, multiple injection ports are respectively located at the internal bleed air pipeline and the external bleed air pipeline place, it is suitable that from the injection port injection washing agent;Air pump, be located at the internal bleed air pipeline place, it is suitable that dry gas is pumped into pipeline.

[0006] Beneficial effect: by setting up and the first container and the second container that stirring device and cooling device are communicated respectively, i. e. setting up and the tar flue gas buffer container corresponding to reaction equipment, and the internal bleed air pipeline and the external bleed air pipeline that the first container and the second container are communicated as a whole, obtain a kind of intercommunication pipeline system, and additionally set air extraction device, air pump and injection port on pipeline system, so that granulating system obtains a kind of fast and efficient tar flue gas pipeline self-cleaning mechanism, to realize the tar material attached on pipeline is quickly and simply handled, prevent tar flue gas pipeline from being blocked, compared with the processing mode in the related art, greatly simplify cleaning process, save time and effort, and cleaning efficiency and effect are high;Nitrogen drying treatment also effectively prevents the influence of residual on production, and the completeness of cleaning engineering is high;Multiple valves and injection ports are arranged in pipeline system, so that operation is more flexible, and solvent oil flowing into sedimentation tank after use can also be layered and reused after standing, greatly reduce cost, conducive to long-term maintenance and use of equipment, and practicality is strong.

[0007] In an alternative embodiment, further comprising, first liquid introduction pipe, with the sedimentation tank is communicated, the first liquid introduction pipe has at least two third manifold, at least two third manifold is respectively communicated with part the first container and second container;Second liquid introduction pipe, with the sedimentation tank is communicated, the second liquid introduction pipe has at least two fourth manifold, at least two fourth manifold is respectively communicated with the first container and second container remaining.

[0008] In an alternative embodiment, the air extraction device is further in communication with the combustion device, and is adapted to supply the extracted flue gas into the combustion device for combustion to generate heat energy.

[0009] In an alternative embodiment, the inner bleed air pipeline and the outer bleed air pipeline are partially arranged along the height direction, and the partial pipelines are arranged in a bent manner to form a horizontal pipeline segment, and the horizontal pipeline segment is arranged at an angle θ with the horizontal direction, wherein 3 degrees ≤ θ ≤ 5 degrees.

[0010] Beneficial effects: the horizontal pipeline segment is arranged at an angle of 3 degrees to 5 degrees with the horizontal direction and is arranged in a downward inclined manner along the flow direction, and such a pipeline arrangement can effectively promote the flow of gas and liquid in the pipeline, and the inclined angle can ensure that the fluid maintains a certain speed in the pipeline, thereby improving the overall flow efficiency, and the partial pipelines arranged along the height direction can cooperate with the horizontal pipeline segment to effectively distribute and guide the flow path of the fluid in the pipeline system, avoid the accumulation or formation of dead angles of the fluid in the pipeline, and ensure that the fluid can flow uniformly and smoothly in the pipeline system, and has strong practicability.

[0011] In an alternative embodiment, the first liquid extraction pipeline and the second liquid extraction pipeline are partially arranged along the height direction.

[0012] In an alternative embodiment, further comprising: a first valve, a plurality of first valves are respectively arranged at the connection positions of the first container and different pipelines;

[0013] a second valve, a plurality of second valves are respectively arranged at the connection positions of the second container and different pipelines.

[0014] In an alternative embodiment, further comprising: a fourth valve arranged at the joint position of the second manifold and the first manifold; a fifth valve, at least two fifth valves are respectively arranged at at least two first manifolds and are respectively located on the downstream side of the joint position of the first container or the second container and the first manifold.

[0015] In an alternative embodiment, further comprising: a pressure relief valve arranged at the outer bleed air pipeline.

[0016] In an alternative embodiment, further comprising: a sixth valve arranged at the joint position of the air extraction device and the inner bleed air pipeline.

[0017] In an alternative embodiment, further comprising: a seventh valve arranged at the joint position of the air pump and the inner bleed air pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is a schematic view of the granulation system for preparing negative electrode material of the present application.

[0020] Figure 2 It is an enlarged schematic view of A in the present application. Figure 1

[0021] Figure 3 It is an enlarged schematic view of B in the present application. Figure 1

[0022] Explanation of reference signs:

[0023] 1, stirring device; 2, first container; 21, first valve; 3, cooling device; 4, second container; 42, second valve; 5, sedimentation tank; 51, first liquid inlet pipe; 52, third manifold; 53, second liquid inlet pipe; 54, fourth manifold; 6, internal air inlet pipe; 61, first manifold; 62, air extraction device; 63, air pump; 64, combustion device; 66, fifth valve; 67, sixth valve; 68, seventh valve; 7, external air inlet pipe; 71, second manifold; 72, fourth valve; 73, pressure relief valve; 8, medicine injection port; 9, horizontal pipe section. Specific embodiments

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] ​​In the description of the utility model, it is necessary to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicating or implying that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it is necessary to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0028] The embodiments of the utility model are described below in combination with Figures 1 to 3 .

[0029] According to the embodiment of the utility model, provide a kind of for negative electrode material preparation granulating system, comprising: at least two stirring devices 1;First container 2, at least two first container 2 respectively with the stirring device 1 by pipeline communication, suitable for respectively receiving from the tar flue gas generated by stirring device 1;Cooling device 3, at least two cooling device 3 respectively with the stirring device 1 by pipeline communication;Second container 4, at least two second container 4 respectively with the cooling device 3 by pipeline communication, suitable for respectively receiving from the tar flue gas generated by cooling device 3;Sedimentation tank 5, the first container 2 and the second container 4 respectively by pipeline with the sedimentation tank 5 are communicated;Internal bleed air pipeline 6, with the sedimentation tank 5 are communicated, the internal bleed air pipeline 6 has at least two first manifold 61, at least two first manifold 61 respectively with part of the first container 2 and second container 4 are communicated;External bleed air pipeline 7, with the sedimentation tank 5 are communicated, the external bleed air pipeline 7 has at least two second manifold 71, at least two second manifold 71 respectively with first manifold 61 corresponding communication, and at least two second manifold 71 respectively with the remaining first container 2 and second container 4 are communicated;Air extraction device 62, be located at the internal bleed air pipeline 6, suitable for the flue gas in the first container 2 and second container 4 is extracted;Injection port 8, multiple injection ports 8 are respectively located at the internal bleed air pipeline 6 and the external bleed air pipeline 7, suitable for injecting from the injection port 8 washing agent;Air pump 63, be located at the internal bleed air pipeline 6, suitable for pumping dry gas into pipeline.

[0030] It should be noted that the negative electrode material is graphite;The stirring device 1 is a high-temperature stirred tank, which is a reactor operating at high temperature;The cooling device 3 is a low-temperature cooling kettle;The first container 2 and the second container 4 are both tar buffer tanks, which are used to temporarily store the tar flue gas generated by the stirring device 1 and the cooling device 3, and allow the tar to deposit in the container. The deposited tar is discharged into the sedimentation tank 5 through the pipeline. The internal bleed air pipeline 6 and the external bleed air pipeline 7 are connected to each other and communicate with a portion of the first containers 2 and the second containers 4, so as to converge and extract the flue gas. After a period of use, the pipeline and the buffer container through which the tar flue gas passes will have certain attachments. The washing agent, which is dissolved oil, can be injected into the system through the injection port 8. Since the tar flue gas pipeline and the buffer container are connected to each other, the dissolved oil can be distributed along the system pipeline to quickly dissolve and remove the attachments. The dissolved attachments and the dissolved oil flow into the sedimentation tank 5, achieving quick and efficient cleaning of the tar flue gas pipeline and cleaning of the buffer container. The dissolved oil and the tar flowing into the sedimentation tank 5 will separate after a period of standing, and the dissolved oil and the tar can be reused respectively.

[0031] It should be noted that the bottom end of the inner air induction pipe 6 is communicated with the sedimentation tank 5, the top end is communicated with the air extraction device 62, at least two first branch pipes are arranged in the pipe, the at least two first branch pipes are diverged at a first node and are combined at a second node, the first node is arranged close to the air extraction device 62, and the second node is arranged close to the sedimentation tank 5; at least two second branch pipes are bent and extended to form a frame type and are respectively communicated with the left first container 2 and the second container 4; at least one medicine injection port 8 is arranged at a position close to the first node of the inner air induction pipe 6; the bottom end of the outer air induction pipe 7 is communicated with the sedimentation tank 5, and the bottom end is diverged to form at least two second branch pipes, the ends of the at least two second branch pipes are respectively communicated with the at least two first branch pipes one by one, and the middle positions of the at least two second branch pipes are communicated with the right first container 2 and the second container 4; and at least two medicine injection ports 8 are respectively arranged at the ends of the at least two second branch pipes.

[0032] The granulation system further comprises a first liquid induction pipe 51 communicated with the sedimentation tank 5, the first liquid induction pipe 51 has at least two third branch pipes 52, and the at least two third branch pipes 52 are respectively communicated with part of the first containers 2 and the second containers 4; a second liquid induction pipe 53 communicated with the sedimentation tank 5, the second liquid induction pipe 53 has at least two fourth branch pipes 54, and the at least two fourth branch pipes 54 are respectively communicated with the remaining first containers 2 and the second containers 4; the air extraction device 62 is further communicated with a combustion device 64, and is suitable for supplying the extracted flue gas into the combustion device 64 to burn to generate heat energy; a plurality of first valves 21 are respectively arranged at the connection positions of the first containers 2 and different pipes; a plurality of second valves 42 are respectively arranged at the connection positions of the second containers 4 and different pipes; a fourth valve 72 is arranged at the joint position of the second branch pipe 71 and the first branch pipe 61; at least two fifth valves 66 are respectively arranged at the at least two first branch pipes 61 and are respectively located on the downstream side of the joint positions of the first containers 2 or the second containers 4 and the first branch pipes 61; further comprising a pressure relief valve 73 arranged at the outer air induction pipe 7; further comprising a sixth valve 67 arranged at the joint position of the air extraction device 62 and the inner air induction pipe 6; further comprising a seventh valve 68 arranged at the joint position of the air pump 63 and the inner air induction pipe 6.

[0033] It is to be noted that the bottom end of the first liquid leading pipe 51 is communicated with the sedimentation tank 5, and then bifurcates to form at least two third manifolds 52, which are respectively communicated with the first container 2 and the second container 4 located at the left side; the bifurcated fourth liquid leading pipes of the second liquid leading pipe 53 are respectively communicated with the first container 2 and the second container 4 located at the right side; the air extraction device 62 is an air extraction fan, which is used to form negative pressure in the pipeline; the combustion device 64 is a flue gas combustion energy conversion station, and the flue gas is converted into heat energy after being fully combusted in the combustion device 64, which can be used for factory hot water supply; a plurality of first valves 21 are arranged at the inlet and outlet of the first container 2, that is, at the connection positions of each different pipeline, which are used to control the opening and closing of the inlet and outlet of the first container 2; the pressure relief valve 73 is used to prevent potential damage and maintain the system pressure at a safe level; the valve is arranged at the medicine injection port 8, and the valve is opened and closed to control the medicine injection.

[0034] The specific use mode is that the material is put into the stirring device 1, heated and stirred uniformly at high temperature, and then enters the cooling device 3 along the pipeline, and the material is cooled to a suitable temperature in the cooling device 3, and then discharged through the cooling device 3; in the above production process, the tar smoke generated during the operation of the stirring device 1 and the cooling device 3 enters the first container 2 or the second container 4 connected thereto respectively, the tar deposits in the container, and flows into the sedimentation tank 5 along the first liquid inlet pipe 51 or the second liquid inlet pipe 53, the smoke is pumped away through the inner air inlet pipeline 6 or the outer air inlet pipeline 7, and enters the combustion device 64, and the smoke is fully burned in the combustion device 64 to convert into heat energy, which can be used for hot water supply in the factory, achieving the effect of full utilization of energy; after a period of use, the tar smoke pipeline and the container can be cleaned, when cleaning the pipeline, first close the valve at the inlet of the fan, that is, the sixth valve 67, the valve at the inlet of the air pump 63, that is, the seventh valve 68, the valve at the first container 2, that is, the first valve 21, the valve at the second container 4, that is, the second valve 42, the valve at the intersection of the first branch and the second branch, that is, the fourth valve 72, and the pressure relief valve 73, open the valve at the medicine injection port 8, solvent oil is injected into the inner air inlet pipeline 6 and the outer air inlet pipeline 7 through the medicine injection port 8, and reacts with the tar adhered to the inner wall of the pipeline, and the reacted tar and solvent oil flow into the sedimentation tank 5 under the action of gravity; when cleaning the container, first close the pressure relief valve 73, the valve at the inlet of the air pump 63, that is, the seventh valve 68, the valve at the inlet of the fan, that is, the sixth valve 67, the valve at the intersection of the first branch and the second branch, that is, the fourth valve 72, the valve at the connection node of the first manifold 61 and the container, that is, the fifth valve 66, the outlet side valve of the first container 2, the outlet side valve of the second container 4, open the valve at the medicine injection port 8, solvent oil is injected into the inner air inlet pipeline 6 and the outer air inlet pipeline 7 through the medicine injection port 8, and most of the solvent oil enters the first container 2 and the second container 4 due to the blocking effect of the fifth valve 66, after the solvent oil fills the container, open the outlet side valves of the first container 2 and the second container 4, the reacted tar and solvent oil flow into the sedimentation tank 5 along the pipeline under the action of gravity, and then the other valves can be opened; after the tar smoke pipeline and the container are cleaned by the solvent oil, nitrogen is pumped into the pipeline and the container by the air pump 63 for drying treatment to prevent residual materials from affecting production; the solvent oil in the sedimentation tank 5 will separate from the tar after a period of standing, and the tar and the solvent oil can be recycled twice, which is economical.

[0035] In this embodiment, by setting the first container 2 and the second container 4 which are in communication with the stirring device 1 and the cooling device 3 respectively, that is, setting the tar flue gas buffer container corresponding to the reaction equipment, and setting the inner air lead pipeline 6 and the outer air lead pipeline 7 which are in overall communication with the first container 2 and the second container 4, a pipeline system in communication with each other is obtained, and the air extraction device 62, the air pump 63 and the medicine injection port 8 are additionally arranged on the pipeline system, so that the granulation system obtains a fast and efficient tar flue gas pipeline self-cleaning mechanism, thereby realizing the rapid and simple treatment of the tar substances attached to the pipeline, preventing the pipeline from being blocked, compared with the treatment mode in the related art, the cleaning process is greatly simplified, time and labor are saved, the cleaning efficiency and effect are high; the nitrogen drying treatment also effectively prevents the influence of the residual substances on the production, the completeness of the cleaning project is high; the plurality of valves and the medicine injection port 8 arranged in the pipeline system make the operation more flexible, and the solvent oil flowing into the sedimentation tank 5 after use can also be separated after standing and reused, which greatly reduces the cost and is beneficial to the long-term maintenance and use of the equipment, and the practicability is high.

[0036] In some embodiments, in combination with Figure 1 As shown, at least one medicine injection port 8 is arranged at the inner air lead pipeline 6 and close to the air extraction device 62; and at least two medicine injection ports 8 are respectively arranged at the second manifold 71 and located at the end of the second manifold 71.

[0037] In some embodiments, in combination with Figure 1 As shown, part of the pipeline of the inner air lead pipeline 6 and the outer air lead pipeline 7 is arranged to extend along the height direction, and the part of the pipeline is bent to form a horizontal pipe section 9, the horizontal pipe section 9 is arranged at an angle θ with the horizontal direction, wherein 3 degrees ≤ θ ≤ 5 degrees; and part of the pipeline of the first liquid lead pipe 51 and the second liquid lead pipe 53 is arranged to extend along the height direction.

[0038] Specifically, the tar flue gas pipeline includes a horizontal pipe section 9 and a vertical pipe section, the horizontal pipe section 9 is also a horizontal pipe section, the angle between the horizontal pipe section 9 and the horizontal direction is in the range of 3 degrees to 5 degrees, and the horizontal pipe section 9 is arranged to tilt downward along the flow direction, which can effectively improve the flow rate of the gas and the liquid therein; and the vertical pipe section is arranged to extend along the height direction, which also helps the flow of the gas and the liquid.

[0039] In this embodiment, the horizontal pipe section 9 is arranged at an angle of 3 degrees to 5 degrees with the horizontal direction and tilts downward along the flow direction, this pipeline arrangement can effectively promote the flow of the gas and the liquid in the pipeline, the inclination angle can ensure that the fluid maintains a certain speed in the pipeline, thereby improving the overall flow efficiency, and part of the pipeline is arranged to extend along the height direction, which cooperates with the horizontal pipe section 9 to effectively distribute and guide the flow path of the fluid in the pipeline system, avoid the accumulation or formation of dead angles of the fluid in the pipeline, and ensure that the fluid can flow uniformly and smoothly in the pipeline system, and the practicability is high.

[0040] Obviously, the above embodiments are only examples for clearly illustrating, but not limit the embodiments. Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the present application.

Claims

1. A granulation system for negative material preparation, characterized by, The system comprises: at least two stirring devices (1); first containers (2) respectively communicating with the stirring devices (1) through pipelines, and adapted to receive the tar gas generated by the stirring devices (1); cooling devices (3) respectively communicating with the stirring devices (1) through pipelines; second containers (4) respectively communicating with the cooling devices (3) through pipelines, and adapted to receive the tar gas generated by the cooling devices (3); a sedimentation tank (5) communicating with the first containers (2) and the second containers (4) through pipelines; an inner air injection pipeline (6) communicating with the sedimentation tank (5), and having at least two first manifolds (61) respectively communicating with a part of the first containers (2) and the second containers (4); an outer air injection pipeline (7) communicating with the sedimentation tank (5), and having at least two second manifolds (71) respectively communicating with the first manifolds (61) and respectively communicating with the remaining first containers (2) and the second containers (4); an air extraction device (62) arranged at the inner air injection pipeline (6) and adapted to extract the tar gas in the first containers (2) and the second containers (4); a plurality of injection ports (8) arranged at the inner air injection pipeline (6) and the outer air injection pipeline (7) and adapted to inject a washing agent through the injection ports (8); an air pump (63) arranged at the inner air injection pipeline (6) and adapted to pump dry gas into the pipeline.

2. The granulating system for negative material preparation according to claim 1, characterized in that, Further, a first liquid injection pipeline (51) communicates with the sedimentation tank (5), and has at least two third manifolds (52) respectively communicating with a part of the first containers (2) and the second containers (4); a second liquid injection pipeline (53) communicating with the sedimentation tank (5), and having at least two fourth manifolds (54) respectively communicating with the remaining first containers (2) and the second containers (4).

3. The granulating system for negative material preparation according to claim 2, wherein, The air extraction device (62) further communicates with a combustion device (64) and is adapted to supply the extracted tar gas into the combustion device (64) to generate heat energy.

4. The granulating system for negative material preparation according to claim 1, wherein, Part of the inner air injection pipeline (6) and the outer air injection pipeline (7) extends in the height direction, and part of the pipelines is bent to form a horizontal pipeline segment (9) arranged at an angle θ with the horizontal direction, where 3°≤θ≤5°.

5. The granulating system for negative material preparation according to claim 2, wherein, Part of the first liquid injection pipeline (51) and the second liquid injection pipeline (53) extends in the height direction.

6. The granulation system for negative material preparation according to claim 1, wherein, Further, a plurality of first valves (21) are arranged at the connection positions between the first containers (2) and different pipelines; a plurality of second valves (42) are arranged at the connection positions between the second containers (4) and different pipelines.

7. The granulation system for negative material preparation according to claim 6, wherein Further comprising a fourth valve (72) arranged at a position where the second manifold (71) and the first manifold (61) meet; Further comprising a fifth valve (66), and at least two fifth valves (66) are arranged at the at least two first manifolds (61) respectively.

8. The granulation system for negative material preparation according to claim 7, wherein, Further comprising a pressure relief valve (73) arranged at the outer bleed air pipeline (7).

9. The granulation system for negative material preparation according to claim 8, wherein, Further comprising a sixth valve (67) arranged at a position where the air extraction device (62) and the inner bleed air pipeline (6) meet.

10. The granulation system for preparing negative electrode materials according to claim 7, characterized in that: Further comprising a seventh valve (68) arranged at a position where the air pump (63) and the inner bleed air pipeline (6) meet.

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