Waste heat recycling system of sodium battery positive electrode material production line

Abstract

The utility model discloses a waste heat recycling system of a sodium battery positive electrode material production line, which comprises a roller kiln, a waste heat recycling system and a waste heat recycling system, an air inlet of the first fan is communicated with an exhaust port of the roller kiln; an air inlet of the cyclone is communicated with an air outlet of the first fan; an air inlet of the first dust collector is communicated with an air outlet of the cyclone; the tube fin heat exchanger comprises a heat dissipation pipeline and a heat absorption box body wrapping the heat dissipation pipeline; a blanking dryer; and a second dust collector. According to the utility model, the surface property of the positive electrode material is effectively prevented from being influenced by the environment to further absorb water in the pipeline conveying process, and the sodium battery positive electrode material can be prevented from absorbing moisture after being contacted with air in the packaging process; the humidity influence of pipelines, equipment and packaging environment which are in contact with materials is reduced, the product percent of pass is effectively improved, the energy utilization efficiency is improved, and meanwhile the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of battery material production equipment, and particularly relates to a waste heat recovery and utilization system for a sodium battery cathode material production line. Background Technique

[0002] The roller hearth kiln is a light-weight continuous industrial kiln and is widely used as a heating device in fields such as ceramics, metallurgy, and machinery. In actual sintering processes, a large amount of high-temperature flue gas is discharged every time. The exhaust gas generates a large amount of heat, and the flue gas flow rate is also relatively high. This not only causes serious environmental pollution but also wastes a large amount of precious energy, which cannot be ignored. Reasonably and fully utilizing industrial waste heat can reduce the energy consumption per unit product and can achieve considerable economic benefits.

[0003] From the perspective of the processing production line of sodium battery cathode materials, it mainly includes processes such as mixing, sintering, crushing, screening, and packaging. Among them, since the cathode material is very sensitive to environmental humidity, in many processes, the workshops of many enterprises have high requirements for the industrial environment, and some even reach a dew point of -10 to -40, and tend to develop towards a lower dew point. Generally speaking, the lower the dew point, the greater the power consumption and the higher the electricity cost. The screening and packaging processes have also become one of the processes with the highest requirements for the industrial environment and the highest energy consumption in the production process of cathode materials. Therefore, in order to cope with continuous cost reduction and zero-carbon transformation, cathode material enterprises need to continuously make efforts on the basis of reducing production costs while taking into account material performance. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a waste heat recovery and utilization system for a sodium battery cathode material production line. This system can effectively collect and utilize the excess heat generated by the roller hearth kiln, improve the energy utilization rate of industrial production, and make it applicable not only to restaurants, bathrooms, etc. in daily life but also to the dehumidification needs of places where humidity needs to be controlled in industrial production.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A waste heat recovery and utilization system for a sodium battery cathode material production line, which includes:

[0006] A roller hearth kiln, which has an exhaust pipe;

[0007] A first fan, whose air inlet is connected to the exhaust port of the roller hearth kiln;

[0008] A cyclone, whose air inlet is connected to the air outlet of the first fan;

[0009] A first dust collector, whose air inlet is connected to the air outlet of the cyclone;

[0010] Tube-fin heat exchanger, which includes a heat dissipation pipeline and a heat absorption box body covering the outside of the heat dissipation pipeline. Both the heat dissipation pipeline and the heat absorption box body have their respective air inlets and outlets. The air inlet of the heat dissipation pipeline is connected to the air outlet of the first dust collector, and the air inlet of the heat absorption box body is connected to the atmosphere or a gas source;

[0011] Feeding dryer, whose air inlet is connected to the air outlet of the heat absorption box body;

[0012] Second dust collector, whose air inlet is connected to the air outlet of the feeding dryer;

[0013] The discharge port of the roller hearth kiln is connected to the feed port of the second dust collector.

[0014] Another embodiment, the system includes a second fan connected to the air outlet of the heat dissipation pipeline.

[0015] Another embodiment, a secondary air pipe is provided at the air outlet of the heat absorption box body, and the secondary air pipe introduces part of the hot air into the workshop where the roller hearth kiln is located.

[0016] Another embodiment, a first pressure reducing valve is provided on the pipeline between the first fan and the cyclone.

[0017] Another embodiment, the system includes a first receiving bucket below the cyclone.

[0018] Another embodiment, the system includes a second receiving bucket below the first dust collector.

[0019] Another embodiment, the lower part of the first dust collector is in an inverted frustum shape, an air hammer is provided on its side wall, and a butterfly valve is provided between the second receiving bucket and the first dust collector.

[0020] Another embodiment, a compensator is provided on the periphery of the heat absorption box body.

[0021] Another embodiment, a heat tracing tape is wound on the pipeline between the heat absorption box body and the feeding dryer.

[0022] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: The present utility model effectively avoids the surface properties of the cathode material from being further affected by water absorption in the process of pipeline transportation, and can also avoid the hygroscopicity of the sodium-ion cathode material after contacting with air during the packaging process; it ensures the chemical properties and storage performance of the ternary material. Especially through effective heat exchange, it ensures that the waste heat can be reasonably utilized, reduces the heat loss in the intermediate process, and at the same time further reduces the humidity influence of the pipelines, equipment, and packaging environment in contact with the material, effectively improving the product qualification rate, enhancing the energy utilization efficiency, and reducing the production cost. Description of the Drawings

[0023] Figure 1 This is a schematic structural diagram of the present utility model. Specific embodiments

[0024] The present utility model will be further described below with reference to the accompanying drawings.

[0025] As Figure 1 shown, the waste heat recovery and utilization system of the sodium battery cathode material production line includes: a roller hearth furnace 1, a first fan 2, a cyclone 3, a first dust collector 4, a tube-fin heat exchanger 5, a blanking dryer 6, a second dust collector 7, a second fan 8, a first receiving bucket 9, a second receiving bucket 10, a compensator 11, and a third fan 18.

[0026] The roller hearth furnace 1 has an exhaust pipe A; the air inlet of the first fan 2 is connected to the exhaust port of the roller hearth furnace 1; the air inlet of the cyclone 3 is connected to the air outlet of the first fan 2; the air inlet of the first dust collector 4 is connected to the air outlet of the cyclone 3;

[0027] The tube-fin heat exchanger 5 includes a heat dissipation pipeline 51 and a heat absorption box body 52 covering the outside of the heat dissipation pipeline 51. Both the heat dissipation pipeline 51 and the heat absorption box body 52 have their respective air inlets and outlets. The air inlet of the heat dissipation pipeline 51 is connected to the air outlet of the first dust collector 4, and the air inlet of the heat absorption box body 52 is connected to the atmosphere or a gas source 0. In this embodiment, the air inlet of the heat absorption box body 52 is connected to a high-pressure gas source 0, and a second pressure reducing valve 20 is provided on its pipeline; the air inlet of the blanking dryer 6 is connected to the air outlet of the heat absorption box body 52, and a temperature and humidity detector 19 is provided at the air inlet of the blanking dryer 6, and a weighing scale 17 is provided at the discharge port of the blanking dryer 6; the air inlet of the second dust collector 7 is connected to the air outlet of the blanking dryer 6, and the air outlet of the second dust collector 7 is connected to the air inlet of the third fan 18; the discharge port of the roller hearth furnace 1 is connected to the feed port B of the second dust collector 7; the second fan 8 is connected to the air outlet of the heat dissipation pipeline 51; a secondary air pipe 12 is provided at the air outlet of the heat absorption box body 52, and the secondary air pipe introduces part of the hot air into the workshop where the roller hearth furnace 1 is located; a first pressure reducing valve 13 is provided on the pipeline between the first fan 2 and the cyclone 3; the first receiving bucket 9 is arranged below the cyclone 3; the second receiving bucket 10 is arranged below the first dust collector 4; the lower part of the first dust collector 4 is in an inverted frustum shape, and an air hammer 14 is provided on its side wall, and a butterfly valve 15 is provided between the second receiving bucket 10 and the first dust collector 4; the compensator 11 is arranged on the outer periphery of the heat absorption box body 52; a heating tape 16 is wound on the pipeline between the heat absorption box body 52 and the blanking dryer 6.

[0028] The utility model utilizes the waste heat of the hot air discharged from the exhaust port of the positive electrode material. After heat exchange, it is led to the blanking dryer 6 before packaging and the material packaging room, so that the moisture or carbon dioxide in the blanking dryer 6 can be effectively discharged before the material enters, effectively avoiding the further water absorption of the surface properties of the positive electrode material affected by the environment during the pipeline transportation process, and also avoiding the moisture absorption of the sodium-based positive electrode material after contacting with air during the packaging process; ensuring the chemical properties and storage properties of the ternary material, reducing the humidity influence of the pipelines, equipment and packaging environment in contact with the material, effectively improving the product qualification rate, enhancing the energy utilization efficiency, and reducing the production cost at the same time.

[0029] The above embodiments are only used to illustrate the technical concept and characteristics of the present utility model, and the purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly. It cannot be used to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A waste heat recovery and utilization system for a sodium battery cathode material production line, characterized in that, It includes: A roller hearth furnace having an exhaust pipe; A first fan, the air inlet of which is communicated with the exhaust port of the roller hearth furnace; A cyclone, the air inlet of which is communicated with the air outlet of the first fan; A first dust collector, the air inlet of which is communicated with the air outlet of the cyclone; A tube-fin heat exchanger, which includes a heat dissipation pipeline and a heat absorption box body covering the outside of the heat dissipation pipeline. Both the heat dissipation pipeline and the heat absorption box body have their respective air inlets and air outlets. The air inlet of the heat dissipation pipeline is communicated with the air outlet of the first dust collector, and the air inlet of the heat absorption box body is connected to the atmosphere or a gas source; A blanking dryer, the air inlet of which is communicated with the air outlet of the heat absorption box body; A second dust collector, the air inlet of which is communicated with the air outlet of the blanking dryer; The discharge port of the roller hearth furnace is communicated with the feed port of the second dust collector.

2. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, characterized in that: The system includes a second fan communicated with the air outlet of the heat dissipation pipeline.

3. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, characterized in that: A secondary air pipe is provided at the air outlet of the heat absorption box body (the secondary air pipe introduces part of the hot air into the workshop where the roller hearth furnace is located).

4. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, wherein: A first pressure reducing valve is provided on the pipeline between the first fan and the cyclone.

5. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, characterized in that: The system includes a first material receiving bucket below the cyclone.

6. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, characterized in that: The system includes a second material receiving bucket below the first dust collector.

7. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 6, characterized in that: The lower part of the first dust collector is in an inverted frustum shape, and an air hammer is provided on its side wall. A butterfly valve is provided between the second material receiving bucket and the first dust collector.

8. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, wherein: A compensator is provided on the periphery of the heat absorption box body.

9. The waste heat recovery and utilization system of the sodium battery cathode material production line according to claim 1, wherein: A heat tracing tape is wound on the pipeline between the heat absorption box body and the blanking dryer.

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