A lithium battery roller kiln heat exchanger

Abstract

The utility model discloses a lithium battery roller kiln heat exchanger, its characterized in that, it includes frame and the tubular heat exchange module, water tank type heat exchange module of setting on it, the tubular heat exchange module includes the cold water pipe of fixing on the frame one and hot water pipe one, heat exchange pipe, and heat exchange pipe sets up in lithium battery roller kiln, and the both ends of heat exchange pipe are connected with cold water pipe one and hot water pipe one respectively, and water tank type heat exchange module includes water tank main part, and water tank main part is provided with a plurality of heat exchange water chamber, and heat exchange water chamber is provided with sealed top cover, and sealed top cover is provided with water inlet hole and water outlet hole. The utility model discloses heat exchange efficiency is high, and maintenance is convenient, and installation is flexible, can effectively realize the heat exchange and recovery in roller kiln, promotes production efficiency and reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery material production equipment, and more specifically to a heat exchanger applied to a lithium battery roller kiln. Background Technology

[0002] In the production of lithium battery materials (such as ternary cathode materials, lithium iron phosphate, and graphite anodes), the roller furnace is the core equipment for achieving high-temperature sintering of materials, with its operating temperature typically ranging from 500 to 1200℃. To ensure the stability of the sintering quality, precise temperature control within the roller furnace is necessary, along with efficient heat recovery from the furnace body to reduce energy consumption. Currently, commonly used heat exchange devices for roller furnaces include single-tube heat exchangers and coil heat exchangers. These traditional devices have the following drawbacks: limited heat exchange area, low heat exchange efficiency, and difficulty in meeting the rapid heating, cooling, and heat recovery requirements of the roller furnace; fixed structural design, leading to scale buildup after long-term use, narrow cleaning channels, and difficult regular maintenance; and some large heat exchangers are too heavy, requiring additional reinforcement for connection to the top or side of the roller furnace, making installation and disassembly time-consuming and labor-intensive. Therefore, developing a heat exchange device and system with high heat exchange efficiency, convenient maintenance, and flexible installation is crucial for improving the production efficiency of lithium battery materials and reducing equipment operation and maintenance costs. Summary of the Invention

[0003] The purpose of this utility model is to provide a stable, reliable, efficient, easy-to-maintain, flexible-installation, energy-saving and environmentally friendly lithium battery roller kiln heat exchanger to overcome the shortcomings of existing technologies.

[0004] The present invention achieves the above objectives by adopting the following technical solution: a lithium battery roller kiln heat exchanger, characterized in that it includes a frame and a tubular heat exchange module and a water tank heat exchange module installed on it.

[0005] The tubular heat exchange module includes multiple cold water pipes and hot water pipes fixed on the frame, as well as heat exchange tubes. The heat exchange tubes are installed inside the lithium battery roller kiln, and their two ends are connected to the cold water pipes and hot water pipes, respectively.

[0006] The water tank type heat exchange module includes a water tank body, which is provided with several water exchange chambers. Each water exchange chamber is provided with a sealed top cover, and the sealed top cover is provided with a water inlet and a water outlet.

[0007] As a further explanation of the above scheme, the heat exchange tubes are either single-tube or coiled. Multiple single-tube heat exchange tubes are arranged in parallel and connected to the cold water pipe and the hot water pipe in parallel. One end of the coiled heat exchange tube is connected to the cold water pipe, and after being bent and extended, its other end is connected to the hot water pipe. By increasing the length of the heat exchange tube in the kiln, the heat exchange effect is enhanced.

[0008] Furthermore, several heat exchange chambers form several heat exchange units. Each heat exchange chamber is connected in series via pipes and is externally connected to a cold water pipe and a hot water pipe. The series design allows the water flow to fully exchange heat in the heat exchange chambers, improving the overall heat exchange efficiency.

[0009] Furthermore, the hot water exchange chamber is equipped with two or more heat exchange plates, which divide the hot water exchange chamber into three or more water flow channels. The heat exchange plates are provided with channel openings so that the three or more water flow channels can be connected in sequence. The water inlet and water outlet of the sealed top cover are respectively located at the water inlet end and water outlet end of the hot water exchange chamber. This structural design extends the flow path of water in the hot water exchange chamber, increases the heat exchange time and area, and improves the heat exchange efficiency.

[0010] Furthermore, the heat exchange plate is a corrugated plate, and the bottom of the sealing cover is grooved to correspond to and fit with the heat exchange plate, ensuring the airtightness of the hot water chamber and preventing water leakage.

[0011] Furthermore, the side wall of the lithium battery roller kiln is equipped with a jacketed water tank heat exchanger, which contains a jacket with heat transfer oil flowing through it (operating temperature 300-400℃). In conjunction with the water tank heat exchange module, the temperature uniformity inside the furnace is controlled within ±5℃, ensuring the sintering quality of the lithium battery materials.

[0012] Furthermore, it also includes an air-cooled heat exchanger, which includes a fan and an air guide shroud. The air guide shroud is aligned with the top of the roller kiln and can quickly cool the roller kiln when needed, supplementing the functions of other heat exchange modules and making the heat exchanger more versatile.

[0013] The beneficial effects that this utility model can achieve by adopting the above-mentioned technical solution are:

[0014] This utility model adopts a plate-structured water tank heat exchange module. The large contact area, combined with multiple types of heat exchangers, improves heat exchange efficiency by more than 50% compared to traditional devices. Maintenance is convenient; both the water tank heat exchange module and the tubular components are detachable, allowing for periodic disassembly and cleaning of scale. In particular, the water tank heat exchange module uses a combination of multiple water exchange chambers, which can be individually flipped for maintenance, making operation easy. The smooth flow channels within the water tank heat exchange module reduce scale buildup and allow for direct flushing with high-pressure water, adapting to diverse production needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the water tank type heat exchange component of this utility model.

[0017] Figure 3 This is a schematic diagram of the box cover structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the box cover structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the box cover structure of this utility model.

[0020] Figure 6 for Figure 4 AA sectional view.

[0021] Figure 7 for Figure 5 BB cross-sectional view.

[0022] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Tubular heat exchange module; 2-1. Cold water pipe 1; 2-2. Hot water pipe 1; 2-3. Heat exchange pipe; 3. Water tank heat exchange module; 3-1. Water tank body; 3-2. Hot water chamber; 3-3. Sealed top cover; 3-31. Groove; 3-32. Water inlet; 3-33. Water outlet; 3-4. Cold water pipe 2; 3-5. Hot water pipe 2; 3-6. Heat exchange plate; 3-61. Channel opening; 3-7. Water flow channel; 3-8. Pipe; 4. Lithium battery roller kiln; 5. Jacketed water tank heat exchanger. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in this description of the utility model, "at least" means one or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Above," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings, making the technical solution and beneficial effects of this utility model clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] like Figures 1-7 As shown, this utility model is a heat exchanger for a lithium battery roller kiln, including a frame 1 and a tubular heat exchange module 2 and a water tank heat exchange module 3 mounted on it. The tubular heat exchange module 2 includes multiple cold water pipes 2-1 and hot water pipes 2-2, and heat exchange tubes 2-3 fixed on the frame 1. The cold water pipes 2-1 and hot water pipes 2-2 are connected to the frame 1 by detachable fasteners, which are bolt and nut assemblies for easy installation and disassembly. In this embodiment, the heat exchange tubes 2-3 are single-tube structures. Multiple single-tube heat exchange tubes 2-3 are arranged parallel to each other in the lithium battery roller kiln 4 and are evenly distributed in the kiln. The heat exchange tubes 2-3 are made of 316 stainless steel, which is corrosion-resistant and high-temperature resistant. The two ends of the heat exchange tubes 2-3 are connected to the cold water pipes 2-1 and hot water pipes 2-2, respectively. This design increases the distribution range of the heat exchange tubes in the kiln and improves the heat exchange efficiency. It is worth noting that heat exchange tubes 2-3 can also be configured as coiled tubes, with one end of the heat exchange tube connected to cold water pipe 1, and the other end connected to hot water pipe 1 after bending and extension. By increasing the length of the heat exchange tube in the kiln, the heat exchange effect is enhanced.

[0029] The water tank type heat exchange module 3 includes a water tank body 3-1, which has 18 water exchange chambers 3-2. Each water exchange chamber 3-2 is equipped with a sealing top cover 3-3, which has an inlet and an outlet. These 18 water exchange chambers 3-2 form 3 sets of heat exchange units, with 6 water exchange chambers in each set connected in series via pipes 3-8. Each heat exchange unit is externally connected to a cold water pipe 3-4 and a hot water pipe 3-5. The series design allows for sufficient heat exchange in the water exchange chambers 3-2, improving the overall heat exchange efficiency. Each heat exchange chamber 3-2 is equipped with two corrugated heat exchange plates 3-6, dividing the chamber into three water flow channels 3-7. The heat exchange plates 3-6 have channel openings 3-61, allowing the three water flow channels 3-7 to connect sequentially. The inlet hole 3-32 and outlet hole 3-33 of the sealing cover 3-3 are located at the inlet and outlet ends of the heat exchange chamber, respectively. This structural design extends the flow path of water within the heat exchange chamber, increasing the heat exchange time and area, and improving heat exchange efficiency. The bottom groove 3-31 of the sealing cover 3-3 corresponds to and fits into the heat exchange plates 3-6, ensuring the airtightness of the heat exchange chamber and preventing water leakage. The corrugated shape of the heat exchange plates 3-6 increases the contact area between the heat exchange plates and the water flow, enhancing the heat exchange effect.

[0030] The side wall of the lithium battery roller kiln 4 is equipped with a jacketed water tank heat exchanger 5. The jacketed water tank heat exchanger 5 contains a jacket through which heat transfer oil (operating temperature 300-400℃) flows. In conjunction with the water tank heat exchange module, it controls the temperature uniformity within the furnace to within ±5℃, ensuring the sintering quality of the lithium battery materials. In addition, the lithium battery roller kiln is also equipped with an air-cooled heat exchanger, which includes a fan and an air guide shroud. The air guide shroud is aligned with the top of the roller kiln, enabling rapid cooling of the roller kiln when needed. This complements the functions of other heat exchange modules, making the heat exchanger more versatile. Since air-cooled heat exchangers are widely used in this technical field, they will not be described in detail here.

[0031] During operation, cold water enters the heat exchange tubes of the tubular heat exchange module through cold water pipe one, exchanges heat inside the roller kiln, and then flows out through hot water pipe one. Alternatively, cold water can enter the hot water chamber of the water tank heat exchange module through cold water pipe two, exchange heat with the kiln, and then flow out through hot water pipe two. The heat transfer oil in the jacketed water tank heat exchanger works in conjunction with the water tank heat exchange module to ensure that the temperature uniformity inside the furnace is within ±5℃. When rapid cooling is required, the air-cooled heat exchanger is activated, blowing air towards the top of the roller kiln through the air guide hood for cooling. For regular maintenance, the heat exchange tubes of the tubular heat exchange module can be disassembled for scale removal. For the water tank heat exchange module, the sealed top cover of each hot water chamber can be opened individually for cleaning, or the internal flow channels can be flushed with high-pressure water.

[0032] Compared with existing technologies, this technical solution offers the following advantages: 1. High heat exchange efficiency: This utility model adopts a plate-structured water tank heat exchange module. The large contact area combined with multiple types of heat exchangers improves heat exchange efficiency by more than 50% compared to traditional devices, enabling rapid heating, cooling, and heat recovery of the roller kiln to meet production needs. 2. Convenient maintenance: Both the water tank heat exchange module and the tubular components are detachable, allowing for periodic disassembly and scale removal. The water tank heat exchange module, in particular, utilizes a multi-chamber combination application mode, allowing for individual flip-top maintenance, simplifying operation and reducing equipment maintenance time and costs. 3. Energy saving and environmental protection: The smooth flow channels within the water tank heat exchange module reduce scale adhesion and allow for direct flushing with high-pressure water, ensuring stable heat exchange efficiency. Highly efficient heat recovery reduces energy waste, adapting to diverse production needs and meeting energy-saving and environmental protection requirements. 4. Flexible installation: The overall structural design is reasonable, with uniform weight distribution. No additional reinforcement is required for connection to the roller kiln, simplifying installation and disassembly, and facilitating equipment maintenance and replacement. 5. Precise temperature control: Through the combination of jacketed water tank heat exchanger and water tank heat exchange module, the temperature uniformity inside the furnace can be controlled within ±5℃, ensuring the stability of the sintering quality of lithium battery materials.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A lithium battery roller hearth kiln heat exchanger characterized by, It includes a frame and tubular heat exchange modules and water tank heat exchange modules mounted on it. The tubular heat exchange module includes multiple cold water pipes and hot water pipes fixed on the frame, and heat exchange tubes. The heat exchange tubes are installed inside the lithium battery roller kiln, and the two ends of the heat exchange tubes are connected to the cold water pipes and hot water pipes, respectively. The water tank type heat exchange module includes a water tank body, which is provided with several water exchange chambers. Each water exchange chamber is provided with a sealed top cover, and the sealed top cover is provided with a water inlet and a water outlet.

2. The lithium battery roller kiln heat exchanger according to claim 1, characterized in that, The heat exchange tubes are either single-tube or coiled. Multiple single-tube heat exchange tubes are arranged in parallel and connected to the cold water pipe and the hot water pipe in parallel. One end of the coiled heat exchange tube is connected to the cold water pipe, and after bending and extending, the other end is connected to the hot water pipe.

3. A lithium battery roller kiln heat exchanger according to claim 1, characterized in that, Several heat exchange chambers form several heat exchange units. Each heat exchange chamber is connected in series through pipes and is externally connected to a cold water pipe and a hot water pipe.

4. A lithium battery roller kiln heat exchanger according to claim 1, characterized in that, The hot water exchange chamber is equipped with two or more heat exchange plates, which divide the hot water exchange chamber into three or more water flow channels. The heat exchange plates are provided with channel openings, and the water inlet and outlet of the sealed top cover are respectively located at the water inlet and water outlet of the hot water exchange chamber.

5. A lithium battery roller kiln heat exchanger according to claim 4, characterized in that, The heat exchange plate is a corrugated plate, and the bottom of the sealing cover plate is grooved to fit into the heat exchange plate.

6. A lithium battery roller kiln heat exchanger according to claim 1, characterized in that, The side wall of the lithium battery roller kiln is equipped with a jacketed water tank heat exchanger. The jacketed water tank heat exchanger has a jacket inside, and heat transfer oil flows through the jacket, which works in conjunction with the water tank heat exchange module.

7. A lithium battery roller kiln heat exchanger according to claim 1, characterized in that, It also includes an air-cooled heat exchanger, which includes a fan and an air guide shroud aligned with the top of the lithium battery roller kiln.

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