High-temperature material conveying system

Abstract

The utility model discloses a high-temperature material conveying system, and belongs to the technical field of negative electrode material production equipment. The device comprises a storage bin, wherein the storage bin is connected with a pipeline acceleration chamber through a discharge pipeline; an air inlet of the pipeline accelerating chamber is connected with a positive pressure conveying fan through a pipeline, a discharging port of the pipeline accelerating chamber is connected with a vacuum feeder through a pipeline, and communicating pipelines among the positive pressure conveying fan, the pipeline accelerating chamber and the vacuum feeder form a positive pressure conveying line. According to the utility model, through the arrangement of the positive pressure conveying fan, a positive pressure conveying environment can be formed in the material conveying pipeline, so that the material conveying efficiency can be improved; and meanwhile, through the arrangement of the pipeline acceleration chamber, airflow disturbance in the pipeline acceleration chamber can be increased by utilizing positive pressure provided by the positive pressure conveying fan, and excessive accumulation of materials in the acceleration chamber is prevented, so that the pipe blockage phenomenon is avoided, and the conveying efficiency can be further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of negative electrode material production equipment, and more specifically relates to a high-temperature material conveying system. Background Art

[0002] With growing global awareness of environmental protection, electric vehicles are becoming increasingly mainstream. Lithium-ion batteries, with their high energy density and lightweight design, have become the preferred battery for electric vehicles. Lithium battery anode materials play a crucial role in this process. Continuous innovation in anode materials has significantly improved the range and charging speed of electric vehicles.

[0003] In the actual production of negative electrode materials, different customer requirements often require a material heating process, after which the heated material is transported to the next process via a conveying pipeline. Currently, two common conveying methods are mechanical and pneumatic. Mechanical conveying cannot achieve a fully sealed material transport, which can easily lead to material leakage. Pneumatic conveying, on the other hand, offers excellent sealing properties and is particularly suitable for long-distance transportation of powder materials.

[0004] For example, the patent CN205771988U discloses a pneumatic conveying device for powders and small particles. The application includes a feed pipe, a sealing device is provided at the upper end of the feed pipe, a pneumatic conveying chute is provided obliquely below the feed pipe, an expansion joint is provided on the pneumatic conveying chute, a discharge port is provided at the lower part of the downwardly inclined end of the pneumatic conveying chute, an exhaust pipe is provided at the upper part, an air distribution plate is provided inside, and an air inlet pipe is provided at the lower end of the pneumatic conveying chute to blow fluidizing air into the pneumatic conveying chute, and the exhaust pipe is connected to one end of the heat exchanger through a first pipe. It has the advantages of fully sealed conveying and no dust. The fluidizing air can assist in feeding and reduce the temperature of the material. The device has low heat energy loss. The high-temperature section of the entire device can achieve non-mechanical operation, so there is no limit on the mechanical failure rate, achieving safe, environmentally friendly and stable operation of the system. The inside of the pneumatic conveying chute is filled with thermal insulation and refractory materials, which can adapt to the conveying needs of materials of various temperatures and has a wider range of applications.

[0005] For example, patent CN118306790A discloses a material conveying device. The filter scraper unit, discharge unit, and feed unit employed in this application work in conjunction with the conveying unit to uniformly discharge materials, preventing high-temperature materials from adhering to the inner wall of the feed tank and the potential deformation of propeller blades caused by sustained high temperatures. Furthermore, cooling during the conveying process prevents problems such as filter cloth stretching and enlargement of filter holes, as well as filter cloth clogging that hinders the discharge of hot air, potentially preventing injuries to workers during discharge.

[0006] While all of the aforementioned applications involve technical improvements to pneumatic conveying, there is still room for improvement. For example, in patent CN205771988U, fluidizing air enters from the lower air chamber of the pneumatic conveying chute to lift and convey the material. However, this results in low conveying efficiency and even a risk of blockage, requiring further improvement. Utility Model Content

[0007] 1. Problems to be solved

[0008] In response to at least some of the problems existing in the above-mentioned prior art, the present invention proposes a high-temperature material conveying system, the purpose of which is to solve the problem that the existing pneumatic conveying equipment has poor conveying efficiency and is even prone to the risk of material blockage.

[0009] 2. Technical solution

[0010] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0011] The utility model provides a high-temperature material conveying system, comprising a storage bin, wherein the storage bin is connected to a pipeline acceleration chamber via a discharge pipe;

[0012] The air inlet of the pipeline acceleration chamber is connected to a positive pressure conveying fan through a pipeline, and the discharge port is connected to a vacuum loader through a pipeline. The connecting pipelines between the positive pressure conveying fan, the pipeline acceleration chamber and the vacuum loader form a positive pressure conveying line.

[0013] Furthermore, a spiral accelerator is provided on the positive pressure conveying line, and the spiral accelerator is located between the pipeline acceleration chamber and the vacuum loader.

[0014] Furthermore, a gate valve and a rotary valve are provided on the discharge pipe of the storage bin; wherein the gate valve is located above the rotary valve and is in a normally open state.

[0015] Furthermore, the air inlet of the positive pressure conveying blower is connected to a protective gas storage tank for conveying protective gas into the positive pressure conveying line, and the protective gas storage tank is provided with an air supply pipe.

[0016] Furthermore, the gas outlet of the vacuum loader is connected to the protective gas storage tank through a pipeline, and the connected pipeline forms a protective gas recovery line.

[0017] Furthermore, a rotary valve is provided at the discharge port of the vacuum loader.

[0018] Furthermore, the pipeline acceleration chamber is arranged on the horizontal section of the positive pressure conveying line, and the spiral accelerator is arranged on the ascending section of the positive pressure conveying line.

[0019] Furthermore, the positive pressure conveying blower is a variable frequency Roots blower, and the protective gas storage tank contains inert gas.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) The utility model provides a high-temperature material conveying system, which can form a positive pressure conveying environment in the material conveying pipeline by setting a positive pressure conveying fan, which is beneficial to improving the material conveying efficiency; at the same time, by setting a pipeline acceleration chamber, the positive pressure provided by the positive pressure conveying fan can increase the air flow disturbance inside the pipeline acceleration chamber, prevent excessive accumulation of materials in the acceleration chamber, thereby avoiding the occurrence of pipe blockage, and further improving the conveying efficiency.

[0023] (2) The utility model provides a high-temperature material conveying system, which adopts a spiral pipe structure inside through the setting of a spiral accelerator, and converts the original linear conveying of materials into a spiral structure, thereby reducing the conveying resistance. It can meet the needs of conveying materials in long-distance vertical pipelines or high-slope pipelines, achieving the purpose of saving effort in climbing and efficient conveying, so as to meet actual production needs.

[0024] (3) In the present invention, a high-temperature material conveying system is provided with a rotary valve on the discharge pipe of the storage silo. The rotary valve can be frequency-controlled to control the uniform feeding of the silo. At the same time, the provision of a plug-in valve facilitates the use of the rotary valve during maintenance.

[0025] (4) The utility model provides a high-temperature material conveying system, in which the gas source of the entire line is inert gas, which effectively solves the problem of combustion caused by direct contact between high-temperature materials and air, thereby reducing the safety risks in the production process. At the same time, the inert gas in the protective gas storage tank is transported by the positive pressure conveying fan, and after the material is transported through the positive pressure conveying line, it is returned to the protective gas storage tank by the protective gas recovery line, effectively realizing the sustainable circulation of the protective gas, reducing energy consumption, and thus reducing production costs. In addition, by setting up the air supply pipe, the loss of protective gas caused by the discharge of high-temperature materials can be compensated, thereby ensuring the continuous operation of the material production line, thereby achieving the purpose of stable production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a simplified structural diagram of a high-temperature material conveying system of the present utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the pipeline acceleration chamber in the present utility model;

[0028] Figure 3 This is a schematic structural diagram of the spiral accelerator in the present utility model.

[0029] In the figure: 1. Storage silo; 2. Pipeline acceleration chamber; 3. Positive pressure conveying fan; 4. Vacuum loader; 5. Screw accelerator; 6. Gate valve; 7. Rotary valve; 8. Shielding gas storage tank; 9. Air supply pipe; 10. Positive pressure conveying line; 11. Shielding gas recovery line. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] The present invention will be further described below in conjunction with specific embodiments.

[0033] like Figure 1 As shown, a high-temperature material conveying system of this embodiment includes a storage bin 1, a pipeline acceleration chamber 2, a positive pressure conveying fan 3, and a vacuum loader 4. The air outlet of the positive pressure conveying fan 3 is connected to the air inlet of the pipeline acceleration chamber 2 via a pipeline, and the material outlet of the pipeline acceleration chamber 2 is connected to the material inlet of the vacuum loader 4 via a pipeline. Thus, the connecting pipelines between the positive pressure conveying fan 3, the pipeline acceleration chamber 2, and the vacuum loader 4 form a positive pressure conveying line 10. At the same time, the material inlet of the pipeline acceleration chamber 2 is connected to the material outlet of the storage bin 1 via a discharge pipeline to complete the feeding operation.

[0034] Specifically, a rotary valve 7 is installed on the discharge pipe of the storage silo 1. This rotary valve 7 can be frequency-controlled to control the uniform feeding of the silo. At the same time, a gate valve 6 is also installed on the discharge pipe. This gate valve 6 is located above the rotary valve 7 and can be kept in a normally open state for use during maintenance of the rotary valve 7.

[0035] Of course, in order to facilitate the discharge operation of the material collected in the vacuum loader 4, a rotary valve 7 can also be provided at the discharge port of the vacuum loader 4 to facilitate the control and adjustment of its discharge state.

[0036] Preferably, the positive pressure conveying fan 3 is a variable frequency Roots blower. The pipeline acceleration chamber 2 is a chute type acceleration chamber (refer to Figure 2As shown in the figure, a chute baffle is provided inside the pneumatic conveying pipe, so that the material enters the pneumatic conveying pipe obliquely along the chute baffle, avoiding the pipe blockage and bridging phenomenon caused by the vertical contact between the material and the air source, which is also conducive to ensuring the efficient transportation of materials.

[0037] In this embodiment, the provision of the positive-pressure conveying fan 3 creates a positive-pressure conveying environment within the material conveying pipeline, thereby improving material conveying efficiency. Furthermore, the provision of the pipeline acceleration chamber 2 utilizes the positive pressure provided by the positive-pressure conveying fan 3 to increase airflow disturbance within the pipeline acceleration chamber 2, preventing excessive accumulation of material within the acceleration chamber and thus avoiding pipe blockage, further improving conveying efficiency.

[0038] In addition, to prevent the high-temperature materials from burning in direct contact with air during transportation, which could pose a safety risk, in this embodiment, the air inlet of the positive-pressure conveying blower 3 is connected to a shielding gas storage tank 8, which is used to deliver shielding gas to the positive-pressure conveying line 10. This prevents the high-temperature materials from burning in direct contact with air, thereby reducing safety risks during the production process. The shielding gas is an inert gas, preferably nitrogen.

[0039] At the same time, the air outlet of the vacuum loader 4 is connected to the shielding gas storage tank 8 through a pipeline, and the connected pipeline forms a shielding gas recovery line 11. This design allows the inert gas in the shielding gas storage tank 8 to be transported by the positive pressure conveying fan 3 through the positive pressure conveying line 10 after completing the material shielding conveying; and then returned to the shielding gas storage tank 8 through the shielding gas recovery line 11, effectively achieving the sustainable circulation of shielding gas, reducing energy consumption, and thus reducing production costs.

[0040] Furthermore, the protective gas storage tank 8 is provided with an air supply pipe 9, which can compensate for the loss of protective gas caused by the high-temperature material when discharging, thereby ensuring the continuous operation of the material production line and achieving the purpose of stable production.

[0041] In actual production, materials are transported over long distances, often using sloped or even straight pipelines. To further ensure the efficiency of long-distance transport using straight or steep pipelines, a spiral accelerator 5 is provided on the positive pressure conveyor line 10 in this embodiment. The spiral accelerator 5 is located between the pipeline acceleration chamber 2 and the vacuum loader 4. Preferably, the spiral accelerator 5 is provided on the straight or sloped pipeline of the positive pressure conveyor line 10, while the pipeline acceleration chamber 2 is located on the horizontal pipeline.

[0042] In this embodiment, the spiral accelerator 5 is provided with a spiral pipe structure (see Figure 3As shown in the figure, the original linear conveying of materials is transformed into a spiral type, thereby reducing the conveying resistance. This can meet the needs of conveying materials in long vertical pipelines or high-slope pipelines, achieving the purpose of saving effort in climbing and efficient conveying, so as to meet actual production needs.

[0043] The above schematically describes the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structural method and embodiment similar to the technical solution without creativeness, they should all fall within the scope of protection of the present invention. At the same time, it should be noted that in this embodiment, the pipeline acceleration chamber, vacuum loader, spiral accelerator, and rotary valve all adopt existing technologies, and their respective working principles and specific structures are also existing technologies.

Claims

1. A high-temperature material conveying system, comprising a storage bin (1), characterized in that: The storage bin (1) is connected to a pipeline acceleration chamber (2) via a discharge pipeline; The air inlet of the pipeline acceleration chamber (2) is connected to a positive pressure conveying fan (3) through a pipeline, and the discharge port is connected to a vacuum loader (4) through a pipeline. The communicating pipelines between the positive pressure conveying fan (3), the pipeline acceleration chamber (2) and the vacuum loader (4) form a positive pressure conveying line (10).

2. A high temperature material conveying system according to claim 1, characterized in that: The positive pressure conveying line (10) is provided with a spiral accelerator (5), and the spiral accelerator (5) is located between the pipeline acceleration chamber (2) and the vacuum loader (4).

3. A high temperature material conveying system according to claim 2, characterized in that: A gate valve (6) and a rotary valve (7) are provided on the discharge pipe of the storage bin (1); wherein the gate valve (6) is located above the rotary valve (7) and is in a normally open state.

4. A high temperature material conveying system according to any one of claims 1 to 3, characterized in that: The air inlet of the positive pressure delivery blower (3) is connected to a protective gas storage tank (8) for delivering protective gas to the positive pressure delivery line (10), and an air supply pipe (9) is provided on the protective gas storage tank (8).

5. A high temperature material conveying system according to claim 4, characterized in that: The gas outlet of the vacuum loader (4) is connected to the protective gas storage tank (8) through a pipeline, and the connected pipeline forms a protective gas recovery line (11).

6. A high temperature material conveying system according to claim 5, characterized in that: A rotary valve (7) is provided at the discharge port of the vacuum feeder (4).

7. A high temperature material conveying system according to claim 2, characterized in that: The pipeline acceleration chamber (2) is arranged on the horizontal section of the positive pressure conveying line (10), and the spiral accelerator (5) is arranged on the ascending section of the positive pressure conveying line (10).

8. The high-temperature material conveying system according to claim 4, characterized in that: The positive pressure conveying blower (3) is a variable frequency Roots blower, and the protective gas storage tank (8) contains inert gas.

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