Novel high-temperature powder or liquid material cooling device

Abstract

The utility model discloses a novel high-temperature powder or liquid material cooling device which is arranged in multiple groups at intervals in the X direction and extends in the Y direction, the cooling device comprises a heat dissipation shell and a heat conduction pipe, the heat dissipation end of the heat conduction pipe is inserted into the heat dissipation shell in the Z direction, and the heat dissipation end of the heat conduction pipe is inserted into the heat dissipation shell in the Y direction. The heat absorption end of the heat conduction pipe downwards penetrates through the heat dissipation shell and is inserted into a to-be-cooled material at the top opening of the graphitization furnace, and the interior of the heat conduction pipe is vacuumized and is filled with an overspeed fluid heat conduction medium in a hot melting and sealing manner; the Y-direction end of the heat dissipation shell is an air inlet end and supplies air to the interior of the heat dissipation shell on the XZ vertical plane, and the other Y-direction end of the heat dissipation shell is an air exhaust end and exhausts air to the upper portion of the heat dissipation shell on the XY transverse plane. According to the device, the whole tank in the core high-temperature area of the graphitization furnace can be cooled according to different sizes of furnace tanks and adjustable configuration quantity, the cooling time is shortened to be within 20 days, the productivity is greatly improved, and the device is simple in structure and easy to implement.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange devices, in particular to a novel high-temperature powder or liquid material cooling device. Background Art

[0002] In the production of graphitization, the cooling time and workload account for more than 90% of the entire graphitization production cycle. Therefore, optimizing the cooling efficiency can significantly shorten the production cycle, and reducing the workload is particularly important. Currently, the cooling of the graphitization furnace mainly uses the following two methods to dissipate material heat:

[0003] 1. Natural cooling (cooling time is about 45 days) In the normal battery negative electrode material graphitization furnace pool, the powder material of the insulation layer inside needs to be electrically heated to about 3000℃, and then the power is turned off to stop heating and start natural cooling. This cooling process takes about 45 days, and the temperature must drop to about 100-300℃ before the material can be discharged. The obvious disadvantage is that the number of days of natural cooling process accounts for too long of the entire production cycle, which is also one of the pain points that urgently need to be solved in the industry. The graphitization furnace pools of various companies vary in size, but the natural cooling time is similar, and there is no good cooling solution. Once the demand for shipments increases, the only way is to increase investment and build more furnace pools, which is very cost-effective for the cost of materials.

[0004] 2. Water cooling (cooling time is about 35 days) Now some factories are considering other cooling methods, such as local cooling of the graphitization furnace pool wall, or water cooling, which have great disadvantages. The working principle is to insert steel pipes into the high-temperature powder inside the insulation layer of the graphitization furnace pool. The water circulation heat exchange in the steel pipe brings the heat of the high-temperature powder to the water pool outside the powder pool for cooling. Because the temperature of the high-temperature powder material is close to 3000℃, it is very easy to generate high-temperature water vapor, dust explosion and other production safety hazards. At the same time, a heat exchange pool needs to be built outside for heat exchange and cooling, which occupies a lot of space and investment. At the same time, because there are many water circulation pipelines, once a pipeline leaks, the factory will have to stop work to troubleshoot, delaying production. It is not a mature solution, and the hidden dangers of safe production are very large. Only a few manufacturers are doing it. Most manufacturers still use natural cooling as the mainstream cooling method.

[0005] In summary, how to design an efficient and safe heat dissipation device for use in a graphitization furnace to shorten the heat dissipation cooling time and reduce the risk of steam explosion has become a technical problem that needs to be urgently solved by people in this field. Utility Model Content

[0006] The object of the present utility model is to solve the deficiencies of the prior art and propose a new type of cooling device for high-temperature powder or liquid materials. This device can be configured with an adjustable number according to the size of the furnace pool to cool the entire pool inside the core high-temperature area of the graphitization furnace. The cooling time is shortened to within 20 days, the production capacity is greatly improved, and the structure is simple and easy to implement.

[0007] A new type of cooling device for high-temperature powder or liquid materials. Define the extension direction of the open top of the graphitization furnace as the X direction and the gravity direction as the Z direction. Multiple groups of the cooling devices are arranged at intervals in the X direction and extend in the Y direction. The cooling device includes: a heat dissipation housing and heat conduction tubes. The heat dissipation ends of the heat conduction tubes are inserted into the heat dissipation housing in the Z direction. The heat absorption ends of the heat conduction tubes penetrate downward through the heat dissipation housing and are inserted into the material to be cooled at the open top of the graphitization furnace. The inside of the heat conduction tubes is evacuated and filled with a super-speed fluid heat conduction medium by hot melting and sealing. One end of the heat dissipation housing in the Y direction is the air inlet end and sends air into the heat dissipation housing in the XZ vertical plane. The other end of the heat dissipation housing in the Y direction is the air outlet end and discharges air to the upper part of the heat dissipation housing in the XY horizontal plane.

[0008] Preferably, heat dissipation fins are coated on the outer parts of the heat dissipation ends of the heat conduction tubes, and the heat conduction tubes include thick tube heat absorption columns and thin tube heat absorption columns. The heat release ends of the thick tube heat absorption columns and the thin tube heat absorption columns are arranged in an alternating and inserted manner inside the heat dissipation housing, and the downward penetration depth of the heat absorption end of the thick tube heat absorption column is greater than that of the heat absorption end of the thin tube heat absorption column.

[0009] Preferably, multiple auxiliary heat dissipation tubes are fixedly and connected in parallel to the heat dissipation end of the thick tube heat absorption column, and a vacuum sleeve is coaxially sleeved and fixed at the bottom end of the thick tube heat absorption column.

[0010] Preferably, a plurality of connecting rings with an inner diameter smaller than the middle section of the vacuum sleeve are press-fitted at both axial ends of the vacuum sleeve, and a hollow cone head is coaxially welded and fixed at the bottom end of the vacuum sleeve. An annular vacuum insulation cavity is provided between the middle section of the vacuum sleeve and the circumferential outer wall of the bottom end of the thick tube heat absorption column.

[0011] Preferably, fans are fixedly provided at both the air inlet end and the air outlet end of the heat dissipation housing.

[0012] The advantages and technical effects of the present utility model are as follows:

[0013] A novel high-temperature powder or liquid material cooling device of the present utility model can be flexibly configured with the number of cooling groups according to the size of the graphitization furnace. The heat dissipation housing provides support and fixation for the heat conduction pipes, and the air inlet and exhaust fans at both ends of the heat dissipation housing provide air circulation and heat dissipation inside the heat dissipation housing. During the heat dissipation operation, the vacuum sleeve at the low end of the thick pipe heat absorption column first contacts and inserts into the material for preliminary heat dissipation (at this time, the temperature difference is relatively high. To improve the service life of the heat conduction pipes and avoid leakage, the thick pipe heat absorption column with a deeper downward penetration depth is used for high-temperature difference cooling and heat exchange first); then, according to the gradually decreasing surface temperature of the material pile in the graphitization furnace, the cooling device is lowered, so that the bottom end of the thin pipe heat absorption column inserts into the material for further sufficient heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a partial cross-sectional view of the present utility model;

[0016] Figure 3 is Figure 2 a partial enlarged view at A in

[0017] Figure 4 a schematic diagram of the working principle of the present utility model;

[0018] In the figure: 1 - fan; 2 - thick pipe heat absorption column; 3 - heat dissipation housing; 4 - thin pipe heat absorption column; 5 - heat dissipation fins; 6 - auxiliary heat conduction pipe; 7 - connecting ring; 8 - super-speed fluid heat conduction medium; 9 - vacuum sleeve; 10 - vacuum insulation cavity; 11 - cone head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following details the embodiments of the utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model and should not be construed as a limitation of the utility model.

[0020] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0021] A novel cooling device for high-temperature powder or liquid materials of the utility model defines the extending direction of the open top of the graphitization furnace as the X direction, the gravity direction as the Z direction. Multiple groups of the cooling devices are arranged at intervals in the X direction and extend in the Y direction. The cooling device includes: a heat dissipation housing 3 and heat conduction tubes. The heat dissipation ends of the heat conduction tubes are inserted into the heat dissipation housing in the Z direction. The heat absorption ends of the heat conduction tubes penetrate downward through the heat dissipation housing and are inserted into the material to be cooled at the open top of the graphitization furnace. The inside of the heat conduction tubes is evacuated and filled with an ultra-high-speed fluid heat conduction medium 8 by heat fusion sealing; one end of the heat dissipation housing in the Y direction is the air inlet end and sends air into the heat dissipation housing in the XZ vertical plane, and the other end of the heat dissipation housing in the Y direction is the air exhaust end and exhausts air to the upper part of the heat dissipation housing in the XY horizontal plane.

[0022] Preferably, heat dissipation fins 5 are coated on the outside of the heat dissipation ends of the heat conduction tubes, and the heat conduction tubes include thick tube heat absorption columns 2 and thin tube heat absorption columns 4; the heat release ends of the thick tube heat absorption columns and the thin tube heat absorption columns are arranged in an alternating manner and inserted into the heat dissipation housing, and the downward penetration depth of the heat absorption end of the thick tube heat absorption column is greater than that of the heat absorption end of the thin tube heat absorption column.

[0023] Preferably, multiple auxiliary heat dissipation tubes 6 are fixedly connected in parallel to the heat dissipation end of the thick tube heat absorption column, and a vacuum sleeve 9 is coaxially sleeved and fixed at the bottom end of the thick tube heat absorption column.

[0024] Preferably, a plurality of connecting rings 7 with an inner diameter smaller than the middle section of the vacuum sleeve are press-fitted at both axial ends of the vacuum sleeve, and a hollow cone head 11 is coaxially welded and fixed at the bottom end of the vacuum sleeve; an annular vacuum heat insulation cavity 10 is left between the middle section of the vacuum sleeve and the circumferential outer wall of the bottom end of the thick tube heat absorption column.

[0025] Preferably, fans 1 are fixedly installed at both the air inlet end and the air exhaust end of the heat dissipation housing.

[0026] In addition, preferably, a plurality of lifting lugs are fixedly installed on the top of the heat dissipation housing, and a placing counterweight block is provided on the top surface of the heat dissipation housing to press down the top plane of the overall cooling device on the top surface of the material pile in the graphitization furnace.

[0027] In order to more clearly illustrate the specific implementation manners of the utility model, an embodiment is provided below:

[0028] The working principle and the cooling operation steps of a novel cooling device for high-temperature powder or liquid materials of the utility model are as follows:

[0029] S1. Lift the whole temperature reduction and cooling device onto the material pile of the graphitization furnace, and then lower the whole temperature reduction and cooling device until the cone head at the bottom end of the thick tube heat absorption column and the vacuum sleeve are first inserted into the material pile. At this time, the thin tube heat absorption column is suspended. Since the temperature of the material pile is relatively high at this time, about 1000 - 2000 °C, heat insulation is carried out through the vacuum heat insulation cavity between the inner wall of the vacuum sleeve and the outer wall of the thick tube heat absorption column. Contact heat transfer is carried out from the cone head and the connecting ring to the thick tube heat absorption column, so as to avoid the problem of cracking and leakage caused by the sudden increase in the internal pressure of the thick tube heat absorption column due to the large temperature difference;

[0030] S2. After the surface temperature of the material pile drops to a certain extent (less than 900 °C), continue to add counterweights to the heat dissipation housing to make the whole temperature reduction and cooling device continue to sink until the thin tube heat absorption column is inserted into the material pile for sufficient heat transfer;

[0031] S3. Repeat step S2 to dissipate heat layer by layer from top to bottom for the material pile. During the heat transfer process, the fans at both ends of the heat dissipation housing always provide air circulation cooling for the heat dissipation fins at the heat dissipation end of the heat conduction tube in the heat dissipation housing.

[0032] In addition, preferably in the present utility model, the thick tube heat absorption column and the thin tube heat absorption column are composed of seamless steel pipes with different thicknesses and heights. The inside of the thick tube heat absorption column and the thin tube heat absorption column is evacuated and filled with an ultra - speed fluid heat conduction medium and then heat - melted and sealed. The ultra - speed fluid heat conduction medium uses the working principle of phase change to absorb heat and vaporize from the liquid state, and then condenses after heat dissipation and returns to the liquid state to complete the whole temperature reduction process. The heat absorption ends of the thick tube heat absorption column and the thin tube heat absorption column are inserted into the material pile (powder pool) layer by layer. The ultra - speed fluid heat conduction medium inside the thick tube heat absorption column and the thin tube heat absorption column quickly absorbs heat, transfers the heat to the heat dissipation fins at the heat dissipation ends of the thick tube heat absorption column and the thin tube heat absorption column to dissipate the heat, and accelerates the air heat transfer and circulation through the air cooling of the fan to take away the heat, thereby achieving safe and rapid temperature reduction.

[0033] Compared with the prior art, the advantages of the present utility model are also as follows:

[0034] 1. The device adopts the structural form of self - developed heat absorption steel columns for heat absorption + air cooling heat dissipation, and cooperates with the phase change cycle heat dissipation of the ultra - speed fluid heat conduction medium, which can rapidly cool the high - temperature powder in the whole pool of the insulation layer inside the graphitization furnace pool layer by layer, rather than local cooling, breaking through the bottleneck of the long natural cooling time cycle of the traditional graphitization furnace pool, so that the temperature reduction and cooling time is greatly shortened to within 20 days, and the production capacity is significantly improved.

[0035] 2. After temperature reduction, the powder material in the insulation layer can be transferred to the converter as a whole pool, improving the production efficiency. Therefore, there is no need for transfer and re - warehousing, reducing the occupation of personnel, site and equipment. At the same time, the oxidation rate of the powder material in the insulation layer is reduced and the service life is increased.

[0036] 3. The "ultra-speed fluid heat-conducting medium" has stable properties. It is colorless, odorless, non-toxic, non-flammable, and non-explosive, ensuring the long-term stable operation of the cooling device, avoiding the situation of high-temperature discharging, and eliminating potential safety hazards such as high-temperature steam and high-temperature powder explosions, thus guaranteeing the safe production of the factory.

[0037] 4. The cooling device is shipped as a whole. After arriving at the factory, install the fan and power it on to use. There is no need to suspend the original production plan arrangement of the factory, no need to transform the existing structure of the graphitization furnace pool box body, and at the same time, customized batch production of the cooling device can be carried out according to the size structure of the graphitization furnace pools of different manufacturers.

[0038] 5. One set of cooling device can meet the cooling requirements of 4 - 5 graphitization furnace pools in production, with high cost performance. It can be operated by 1 - 2 people, is easy to get started, does not require complex operation procedures, and can be adjusted at any time according to different cooling requirements, realizing large-scale application.

[0039] 6. In the context of the highly competitive negative electrode material industry today, the cooling device can break through the industry's technical bottlenecks, reduce costs and increase efficiency for enterprises, and improve the capital utilization rate and turnover rate of enterprises. At the same time, the production capacity is greatly increased, creating considerable economic benefits for enterprises. The cooling device has high cost performance and high investment return, effectively enhancing the industry competitiveness of enterprises while ensuring the safe production of enterprises.

[0040] Finally, the unmentioned parts of the utility model all adopt mature products and mature technical means in the prior art.

[0041] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in the embodiments or examples of the utility model.

[0042] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of the utility model. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. A novel high-temperature powder or liquid material cooling device, wherein the extension direction of the top opening of the graphitization furnace is defined as the X direction and the gravity direction is the Z direction, and is characterized in that: The cooling device is arranged in multiple groups in the X direction and extends in the Y direction. The cooling device includes: a heat dissipation shell and a heat conducting pipe, wherein the heat dissipation end of the heat conducting pipe is plugged into the heat dissipation shell in the Z direction, the heat absorption end of the heat conducting pipe penetrates the heat dissipation shell downward and is inserted into the material to be cooled at the top of the graphitization furnace, and the interior of the heat conducting pipe is evacuated and hot-melt sealed and filled with ultra-speed fluid heat conducting medium; one end of the heat dissipation shell in the Y direction is the air inlet end and supplies air to the inside of the heat dissipation shell in the XZ vertical plane, and the other end of the heat dissipation shell in the Y direction is the air exhaust end and exhausts air to the upper part of the heat dissipation shell in the XY horizontal plane.

2. A novel high-temperature powder or liquid material cooling device according to claim 1, characterized in that: The heat dissipation ends of the heat pipes are coated with heat dissipation fins on the outside, and the heat absorption ends of the heat pipes are coaxially welded with hollow cone heads, and the heat pipes include thick tube heat absorption columns and thin tube heat absorption columns; the heat release ends of the thick tube heat absorption columns and the thin tube heat absorption columns are alternately arranged and plugged into the heat dissipation shell, and the downward exploration depth of the heat absorption end of the thick tube heat absorption column is greater than the downward exploration depth of the heat absorption end of the thin tube heat absorption column.

3. A novel high-temperature powder or liquid material cooling device according to claim 2, characterized in that: The heat dissipation end of the thick tube heat absorbing column is fixed and connected in parallel with a plurality of auxiliary heat dissipation pipes, and a vacuum sleeve is coaxially sleeved and fixed on the bottom end of the thick tube heat absorbing column.

4. A novel high-temperature powder or liquid material cooling device according to claim 3, characterized in that: The two axial ends of the vacuum sleeve are pressed together with a plurality of connecting rings whose inner diameter is smaller than the middle section of the vacuum sleeve, and an annular vacuum insulation cavity is left between the middle section of the vacuum sleeve and the circumferential outer wall of the bottom end of the thick tube heat absorbing column.

5. The novel high-temperature powder or liquid material cooling device according to claim 1 is characterized in that: The air inlet end and the air outlet end of the heat dissipation housing are both fixedly provided with fans.

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