Integrated circulating heat exchange cooling kiln

Abstract

The utility model provides a kind of integrated circulating heat exchange cooling kiln, including kiln body and box, the top surface of kiln body is connected with the bottom surface of box, the bottom surface of box is opened with the inside space intercommunication of kiln body's air inlet hole and air outlet hole, the inside of box is equipped with first heat exchanger, the position of air outlet hole is equipped with fan, airflow in box is driven along first direction and flows through the inside of box, and airflow in kiln body is driven along the direction opposite to first direction and flows through the inside of kiln body, wherein, first direction is the conveying direction of kiln body, thus, the inside of kiln body and box can be realized after airflow cooling in the present application, for kiln with very high sealing requirement, leakage risk can be reduced, gas recycling is realized simultaneously, gas consumption is reduced, and internal atmosphere pressure field is more stable.

Description

Technical Field

[0001] This utility model relates to the field of kiln technology, and in particular to an integrated circulating heat exchange and cooling kiln. Background Technology

[0002] Lithium-ion battery materials need to be fired in a kiln at high temperatures to achieve the required physical and chemical properties, ensuring their performance in the battery. Cold air is blown into the kiln tail to cool the fired lithium-ion battery materials. Lithium-ion battery materials, especially lithium and some electrode materials, are prone to reacting with oxygen in the air, leading to oxidation. Oxidation not only degrades material performance but can also affect battery safety. A protective atmosphere (such as nitrogen, argon, or other inert gases) effectively prevents oxidation, ensuring the purity and performance of the materials.

[0003] Chinese patent document CN202223029614.1 discloses an atmosphere-protected circulating cooling device for a continuous kiln. The pipes connecting the nitrogen station to the continuous kiln, the pipes connecting to the input end of the quenching fan, and the pipes connecting to the input end of the slow cooling fan are all equipped with regulating valves. The output end of the exhaust fan is also equipped with a pressure sensor and an exhaust pipe; the exhaust pipe is equipped with an electronic control valve. This cooling device is connected to the kiln tail via pipes, resulting in a complex structure and a risk of leakage at the pipe connections. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an integrated circulating heat exchange cooling kiln, which aims to solve the problem that the existing cooling device is connected to the kiln tail of the kiln through a pipe, which has a complex structure and is prone to leakage at the pipe connection.

[0005] This utility model provides an integrated circulating heat exchange cooling kiln, including a kiln body and a box. The top surface of the kiln body is connected to the bottom surface of the box. An air inlet and an air outlet are provided on the bottom surface of the box. Both the air inlet and the air outlet are connected to the internal space of the kiln body. The air inlet and the air outlet are arranged sequentially along a first direction. A first heat exchanger is provided inside the box. A fan is provided at the location of the air outlet. The fan is used to drive the airflow in the box to flow through the interior of the box along the first direction, and to drive the airflow in the kiln body to flow through the interior of the kiln body in a direction opposite to the first direction. The first direction is the conveying direction of the kiln body.

[0006] In some embodiments of this utility model, the plurality of air inlets are divided into a plurality of air inlet groups, the air inlets in the same air inlet group have the same diameter, the plurality of air inlet groups are arranged sequentially along the first direction, and a distance is maintained between two adjacent air inlet groups.

[0007] In some embodiments of this utility model, the diameter of the air inlets in the plurality of air inlet groups decreases sequentially along the first direction.

[0008] In some embodiments of this utility model, the interior of the housing is provided with a first baffle plate corresponding to the number of air inlet groups. The first baffle plate extends along a second direction and is disposed adjacent to the air inlet groups. The air inlet groups and the first baffle plate are arranged sequentially along the first direction, wherein the second direction is perpendicular to the first direction.

[0009] In some embodiments of this utility model, two second wind deflectors are symmetrically arranged between two adjacent first wind deflectors, and both second wind deflectors extend along the second direction and are staggered from the first wind deflectors.

[0010] In some embodiments of this utility model, a third wind deflector is provided between adjacent first and second wind deflectors, and the air inlet group is provided between the third wind deflector and the first wind deflector. The third wind deflector extends along the second direction and is offset from the second wind deflector.

[0011] In some embodiments of this utility model, the first heat exchanger includes a plurality of first heat exchange tubes, the first heat exchange tubes extending along the second direction, and the first baffle and the second baffle are both located between two adjacent first heat exchange tubes.

[0012] In some embodiments of this utility model, the air outlet is located at the end of the kiln body.

[0013] In some embodiments of this utility model, the fan includes a motor and fan blades. The motor is mounted on the housing, and the power output end of the motor extends into the housing and connects to the fan blades. A coil is wound around the periphery of the motor, and the coil is used to dissipate heat from the motor.

[0014] In some embodiments of this utility model, a second heat exchanger is provided inside the kiln body, and the second heat exchanger is adjacent to the top of the kiln.

[0015] Beneficial Effects: This utility model provides an integrated circulating heat exchange cooling kiln, including a kiln body and a box. The top surface of the kiln body is connected to the bottom surface of the box. The bottom surface of the box has an air inlet and an air outlet communicating with the internal space of the kiln body. A first heat exchanger is installed inside the box, and a fan is installed at the air outlet. The fan drives the airflow inside the box to flow through the interior of the box in a first direction and drives the airflow inside the kiln body to flow through the interior of the kiln body in the opposite direction to the first direction. The first direction is the conveying direction of the kiln body. Therefore, this application can achieve internal circulation of airflow after cooling inside the kiln body and the box. For kilns with high sealing requirements, this can reduce the risk of leakage, while realizing gas recycling, reducing gas consumption, and making the internal atmosphere pressure field more stable. In addition, since the air inlet of the box is directly connected to the internal space of the kiln, hot airflow can be directly drawn away. Due to the large difference in calorific value between the box and the kiln, the heat exchange efficiency is high. Finally, it greatly improves the flow of air inside the kiln, thereby improving the heat exchange efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the integrated circulating heat exchange cooling kiln of this utility model;

[0018] Figure 2 for Figure 1 Cross-sectional view along the BB direction;

[0019] Figure 3 This is a schematic diagram of the internal structure of the box.

[0020] In the diagram: 1. Kiln body; 2. Box body; 21. Air inlet; 22. Air outlet; 23. First heat exchanger; 24. First baffle plate; 25. Second baffle plate; 26. Third baffle plate; 3. Fan; 31. Motor; 32. Fan blade; 33. Coil; 4. Second heat exchanger. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figures 1 to 3This utility model provides an integrated circulating heat exchange cooling kiln, including a kiln body 1 and a box 2. The top surface of the kiln body 1 is connected to the bottom surface of the box 2. An air inlet 21 and an air outlet 22 are provided on the bottom surface of the box 2. Both the air inlet 21 and the air outlet 22 are connected to the internal space of the kiln body 1. The air inlet 21 and the air outlet 22 are arranged sequentially along a first direction. A first heat exchanger 23 is provided inside the box 2. A fan 3 is provided at the position of the air outlet 22. The fan 3 is used to drive the airflow in the box 2 to flow through the interior of the box 2 along the first direction, and to drive the airflow in the kiln body 1 to flow through the interior of the kiln body 1 in a direction opposite to the first direction. The first direction is the conveying direction of the kiln body 1.

[0023] This application enables internal airflow cooling and recirculation within the kiln body 1 and the housing 2. For kilns with high sealing requirements, this reduces the risk of leakage, while simultaneously achieving gas recycling, reducing gas consumption, and creating a more stable internal atmosphere pressure field. It is understood that when the motor 31 starts, it drives the flow of the protective atmosphere inside the kiln body 1 and the housing 2. The airflow within the housing 2 flows in the first direction. The high-temperature gas cools down after passing through the first heat exchanger 23 and enters the kiln body 1 through the outlet 22. The lower-temperature airflow exiting the outlet 22 flows in the opposite direction to the first direction, passing through the components to be cooled within the kiln body 1 (e.g., the sagger used to load lithium battery materials) and then enters the housing 2 through the inlet 21. This cycle continues, using the first heat exchanger 23 to cool the components. Figure 1 In the diagram, direction A is the first direction.

[0024] Furthermore, when this application is applied to the firing process of lithium battery materials, because the saggers containing the lithium battery materials are placed in multiple layers and rows, the heat stored in the central sagger cannot be discharged, resulting in an excessively high exit temperature of the central sagger. However, in this application, because the low-temperature airflow flows through the sagger in a direction opposite to the first direction, it can pass horizontally through the gap between the upper and lower saggers, carrying away the heat from the central sagger and effectively preventing the central sagger from becoming too hot when exiting the kiln.

[0025] In some embodiments of this utility model, the plurality of air inlets 21 are divided into a plurality of air inlet groups. The air inlets 21 within the same air inlet group have the same diameter. The plurality of air inlet groups are arranged sequentially along the first direction, and a distance is maintained between adjacent air inlet groups. Specifically, eight air inlets 21 are described as a group. The eight air inlets 21 are divided into two adjacent columns, with four air inlets 21 in each column, and the four air inlets 21 are arranged adjacent to each other. A large distance is maintained between adjacent groups of air inlets, saving the number of holes that need to be opened.

[0026] In some embodiments of this invention, the diameters of the air inlets 21 within the plurality of air inlet groups decrease sequentially along the first direction. Since the airflow temperature is lower closer to the air outlet 22 within the kiln body 1, it carries less heat, and therefore requires fewer first heat exchange tubes to pass through after entering the chamber 2. Therefore, by controlling the size of the air inlet 21, the airflow rate entering the chamber 2 at different locations is controlled to ensure that the airflow in each part can be fully heat-exchanged.

[0027] In some embodiments of this utility model, the interior of the housing 2 is provided with a first baffle plate 24 corresponding to the number of air inlet groups. The first baffle plate 24 extends along a second direction and is disposed adjacent to the air inlet groups. The air inlet groups and the first baffle plate 24 are arranged sequentially along the first direction, wherein the second direction is perpendicular to the first direction. This embodiment is applicable to the case where the first heat exchange tube is arranged along the second direction. After the airflow enters the housing 2 from the air inlet 21, it is blocked by the first baffle plate 24, and the airflow is forced to flow to both sides along the second direction through the first heat exchange tube, thereby enabling the airflow to obtain sufficient heat exchange.

[0028] In some embodiments of this utility model, two symmetrically arranged second baffles 25 are provided between two adjacent first baffles 24. Both second baffles 25 extend along the second direction and are staggered from the first baffles 24. In this embodiment, after the airflow blocked by the first baffles 24 flows along the second direction, it continues to flow along the first direction under the action of the fan 3. To prevent the first heat exchange tube in front of the first baffles 24 from having no airflow, the second baffles 25 block the airflow in the first direction, forcing the airflow to flow along the second direction towards the middle through the first heat exchange tube, thereby enabling the airflow to receive sufficient heat exchange.

[0029] In some embodiments of this utility model, the first heat exchanger 23 includes a plurality of first heat exchange tubes extending along the second direction. The first baffle plate 24 and the second baffle plate 25 are both located between two adjacent first heat exchange tubes. In this embodiment, after the airflow blocked by the second baffle plate 25 flows along the second direction, it continues to flow along the first direction under the action of the fan 3. In order to avoid the airflow blocked by the second baffle plate 25 from affecting the airflow that has just entered the housing 2, the third baffle plate 26 blocks the airflow in the first direction. The airflow is forced to flow along the second direction to both sides through the first heat exchange tubes, so that the airflow can get sufficient heat exchange.

[0030] The aforementioned first baffle plate 24, second baffle plate 25 and third baffle plate 26 greatly improve the heat exchange efficiency of the airflow in the box 2.

[0031] In some embodiments of this utility model, the first heat exchanger 23 includes a plurality of first heat exchange tubes, the first heat exchange tubes extending along the second direction, and the first baffle plate 24 and the second baffle plate 25 are both located between two adjacent first heat exchange tubes.

[0032] In some embodiments of this utility model, the air outlet 22 is located at the end of the kiln body 1. The blower 3 can generate negative pressure at the end of the kiln body 1 to ensure that the gas flow inside the kiln remains orderly, effectively preventing airflow stagnation or backflow in certain areas of the box 2 or the kiln body 1.

[0033] In some embodiments of this utility model, the fan 3 includes a motor 31 and fan blades 32. The motor 31 is mounted on the housing 2, and the power output end of the motor 31 extends into the housing 2 and connects to the fan blades 32. A coil 33 is wound around the periphery of the motor 31 for heat dissipation. Specifically, the fan 3 is built-in. Since there are no external pipes, the risk of leakage is greatly reduced, heat exchange efficiency is significantly improved, and costs are reduced.

[0034] In some embodiments of this utility model, a second heat exchanger 4 is provided inside the kiln body 1, and the second heat exchanger 4 is adjacent to the top of the kiln body 1. In this embodiment, the second heat exchanger 4 also consists of several heat exchange tubes arranged at intervals, which can further improve the heat exchange efficiency of the system.

[0035] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An integrated circulating heat exchange cooling kiln, characterized in that: The kiln includes a kiln body (1) and a box (2). The top surface of the kiln body (1) is connected to the bottom surface of the box (2). An air inlet (21) and an air outlet (22) are provided on the bottom surface of the box (2). The air inlet (21) and the air outlet (22) are both connected to the internal space of the kiln body (1). The air inlet (21) and the air outlet (22) are arranged sequentially along a first direction. A first heat exchanger (23) is provided inside the box (2). A fan (3) is provided at the position of the air outlet (22). The fan (3) is used to drive the airflow in the box (2) to flow through the interior of the box (2) along the first direction, and to drive the airflow in the kiln body (1) to flow through the interior of the kiln body (1) in a direction opposite to the first direction. The first direction is the conveying direction of the kiln body (1).

2. The integrated circulating heat exchange cooling kiln according to claim 1, characterized in that: The plurality of air inlets (21) are divided into a plurality of air inlet groups. The air inlets (21) in the same air inlet group have the same diameter. The plurality of air inlet groups are arranged sequentially along the first direction, and a distance is maintained between two adjacent air inlet groups.

3. The integrated circulating heat exchange cooling kiln according to claim 2, characterized in that: The diameter of the air inlets (21) in the plurality of air inlet groups decreases sequentially along the first direction.

4. The integrated circulating heat exchange cooling kiln according to claim 3, characterized in that: The housing (2) is provided with a first baffle plate (24) corresponding to the number of air inlet groups. The first baffle plate (24) extends along the second direction and is disposed adjacent to the air inlet groups. The air inlet groups and the first baffle plate (24) are arranged sequentially along the first direction, wherein the second direction is perpendicular to the first direction.

5. The integrated circulating heat exchange cooling kiln according to claim 4, characterized in that: Two second wind deflectors (25) are symmetrically arranged between two adjacent first wind deflectors (24). Both second wind deflectors (25) extend along the second direction and are offset from the first wind deflectors (24).

6. The integrated circulating heat exchange cooling kiln according to claim 5, characterized in that: A third wind deflector (26) is provided between the adjacent first wind deflector (24) and second wind deflector (25). The air inlet group is located between the third wind deflector (26) and the first wind deflector (24). The third wind deflector (26) extends along the second direction and is offset from the second wind deflector (25).

7. The integrated circulating heat exchange cooling kiln according to claim 6, characterized in that: The first heat exchanger (23) includes a plurality of first heat exchange tubes, which extend along the second direction. The first baffle (24) and the second baffle (25) are both located between two adjacent first heat exchange tubes.

8. The integrated circulating heat exchange cooling kiln according to claim 1, characterized in that: The air outlet (22) is located at the end of the kiln body (1).

9. The integrated circulating heat exchange cooling kiln according to claim 8, characterized in that: The fan (3) includes a motor (31) and a fan blade (32). The motor (31) is mounted on the housing (2). The power output end of the motor (31) extends into the housing (2) and is connected to the fan blade (32). A coil (33) is wound around the periphery of the motor (31) for heat dissipation.

10. The integrated circulating heat exchange cooling kiln according to claim 1, characterized in that: The kiln body (1) is provided with a second heat exchanger (4), which is located adjacent to the top of the kiln body (1).

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