Novel drying system for lithium iron phosphate material

Abstract

The utility model discloses a novel drying system for lithium iron phosphate materials, which comprises a conveying system, a drying system, a control system, a pipeline temperature control system and an automatic valve system, the conveying system comprises a first conveyor and a second conveyor, the conveying system is used for conveying dry and wet lithium iron phosphate materials, and the first conveyor is used for conveying the dry and wet lithium iron phosphate materials. The drying system comprises a drying machine and belongs to the technical field of lithium iron phosphate production. According to the novel drying system for the lithium iron phosphate material, the material and tail gas are dried through the drying system, the influence of the external environment on the material is effectively isolated through the totally-closed environment, the risk that the material is polluted in the processing process is greatly reduced, and therefore the purity of the material is remarkably improved; the drying system ensures the production efficiency and the product quality, realizes maximum utilization of resources and sustainable development of the environment, is high in automatic control operation efficiency, and realizes full-automatic control in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium iron phosphate production, in particular to a novel drying system for lithium iron phosphate materials. Background Art

[0002] With the development of society and the increasing attention to environmental protection, the utilization of green new energy has increased significantly, and the energy storage industry has emerged accordingly. Due to its characteristics such as ultra-long life, safe use, large capacity, and environmental friendliness, lithium iron phosphate batteries have become the mainstream choice in the energy storage market. Therefore, a drying system for processing lithium iron phosphate materials has emerged. For the drying conditions of lithium iron phosphate materials, conventional drying systems are not very applicable to such materials, so a drying system specifically for processing such materials has been developed. In the operation process of traditional drying systems, there are problems such as large raw material losses and low production efficiency. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a novel drying system for lithium iron phosphate materials, which solves the above problems.

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions: A novel drying system for lithium iron phosphate materials includes a conveying system, a drying system, a control system, a pipeline temperature control system, and an automatic valve system;

[0005] The conveying system includes a first conveyor and a second conveyor, and the conveying system is used for conveying wet and dry lithium iron phosphate materials;

[0006] The drying system includes a dryer. The tail gas end of the dryer is connected to a sintered plate dust collector. The end of the sintered plate dust collector is connected to a tail gas condenser. The end of the tail gas condenser is connected to an induced draft fan. The end of the induced draft fan is connected to an air preheater. The air preheater is connected to the dryer. The drying system is used for filtering, drying, and recycling the tail gas;

[0007] The control system includes a programmable PLC, and the control system is used for overall control;

[0008] The pipeline temperature control system includes a temperature sensor and a flow sensor, and the pipeline temperature control system is used for real-time monitoring of the internal temperature of the equipment to maintain the stability of the material processing temperature and moisture;

[0009] The automatic valve system includes a plurality of automatic valves;

[0010] All the connections are pipeline connections.

[0011] Preferably, the first conveyor is installed at the feed inlet of the dryer, and the second conveyor is installed at the discharge outlet of the dryer. Both the first conveyor and the second conveyor are screw conveyors, which facilitates the transportation of wet and dry lithium iron phosphate materials.

[0012] Preferably, the drying system uses low-temperature and low-pressure steam as the drying gas source, and the drying gas source is connected to the dryer, enabling the indirect drying of the lithium iron phosphate materials inside the dryer using low-temperature and low-pressure steam, effectively preventing the oxidation of lithium iron phosphate materials at high temperatures and avoiding contact between the materials and moisture.

[0013] Preferably, the temperature sensor is installed on the pipeline, the dryer, the sintered plate dust collector, and the tail gas condenser, enabling real-time monitoring of the temperature of the tail gas, thus facilitating temperature control.

[0014] Preferably, a drain cooler is connected to the end of the air preheater, and the drain cooler can recover the condensate water.

[0015] Preferably, a serpentine coil is provided inside the tail gas condenser, and both ends of the serpentine coil are connected to circulating water, which can increase the contact area with the tail gas by using the serpentine coil, thereby condensing the moisture in the tail gas.

[0016] Preferably, a backwashing device is provided on the sintered plate dust collector, and the backwashing device is used for backwashing and dust cleaning operations of the sintered plate dust collector, which can clean the dust and prevent blockage of the sintered plate dust collector.

[0017] Preferably, a flushing water pump is connected to the tail gas condenser, and the end of the flushing water pump is connected to the intermediate water in the factory area, which can flush the inside of the tail gas condenser and improve the heat exchange effect.

[0018] The present utility model provides a novel drying system for lithium iron phosphate materials. Compared with the prior art, it has the following beneficial effects:

[0019] 1. The novel drying system for lithium iron phosphate materials indirectly dries the materials by introducing low-temperature and low-pressure steam into the dryer for heat exchange with the materials. The tail gas is filtered by a sintered plate dust collector, and the moisture in the filtered tail gas is condensed by a tail gas condenser. A part of the condensed tail gas is sent to a carrier gas preheater, where it is heated and used as the supplementary carrier gas for the dryer to achieve carrier gas circulation. The heated tail gas can greatly improve the heat exchange efficiency of the dryer compared with normal-temperature air. The fully enclosed environment effectively isolates the influence of the external environment on the materials, greatly reducing the risk of material contamination during the processing, thus significantly improving the purity of the materials. While ensuring the production efficiency and product quality, the drying system realizes the maximization of resource utilization and the sustainable development of the environment. At the same time, the system has high automation control operation efficiency and realizes full automation control during the operation process.

[0020] 2. The novel drying system for lithium iron phosphate materials can be monitored in real time through the control system and the pipeline temperature control system, and the data is remotely transmitted and fed back. The entire drying system can be controlled in the main control room to adjust the operation parameters. This kind of automatic control not only optimizes the processing quality of the materials, but also improves the production efficiency of the materials. It enables remote operation of the system or equipment without being on-site. This remote operation method not only improves the work efficiency, but also reduces the labor cost and on-site safety risks. In addition, the data recording function of the system's automatic control helps analyze the data fluctuations during the material processing, providing valuable basis for process optimization and equipment maintenance, thus further improving the production efficiency and product quality. Brief Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present utility model;

[0022] Figure 2 is the partial structural schematic diagram of the present utility model.

[0023] In the figure: 1. First conveyor; 2. Second conveyor; 3. Dryer; 4. Sintered plate dust collector; 5. Tail gas condenser; 6. Flushing water pump; 7. Air preheater; 8. Induced draft fan; 9. Flow sensor; 10. Temperature sensor; 11. Control system; 12. Drain cooler. Detailed Description of the Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figure 1-2, the present utility model provides a technical solution: a novel drying system for lithium iron phosphate materials, including a conveying system, a drying system, a control system 11, pipelines, a pipeline temperature control system, and an automatic valve system. The material can be conveyed through the conveying system, and the drying system is used to dry the material. At the same time, the tail gas is dried, heated, and recycled. Moreover, the fully enclosed environment effectively isolates the influence of the external environment on the material, greatly reducing the risk of material contamination during the processing process, thereby significantly improving the purity of the material. While ensuring the production efficiency and product quality, the drying system realizes the maximum utilization of resources and the sustainable development of the environment. At the same time, the system has a high automation control operation efficiency and realizes the full automation control of the operation process.

[0026] The conveying system includes a first conveyor 1 and a second conveyor 2. The conveying system is used to convey wet and dry lithium iron phosphate materials. The first conveyor 1 is installed at the feeding port of the dryer 3, and the second conveyor 2 is installed at the discharging port of the dryer 3. Both the first conveyor 1 and the second conveyor 2 are set as screw conveyors, enabling convenient conveyance of wet and dry lithium iron phosphate materials.

[0027] The drying system includes a dryer 3. The tail gas end of the dryer 3 is connected to a sintered plate dust collector 4. The sintered plate dust collector 4 has excellent filtering effect, can effectively capture and separate the fine particles in the tail gas and recycle them, ensuring the cleanliness of the tail gas at the air outlet. The end of the sintered plate dust collector 4 is connected to a tail gas condenser 5. The filtered tail gas exchanges heat with the sintered plate dust collector 4, enabling the condensation of the moisture in the tail gas. The tail gas condenser 5 is internally provided with a serpentine coil. The two ends of the serpentine coil are connected with circulating water, which can increase the contact area with the tail gas by using the serpentine coil, thereby condensing the moisture in the tail gas. The end of the tail gas condenser 5 is connected to an induced draft fan 8. The end of the induced draft fan 8 is connected to an air preheater 7. The induced draft fan 8, in cooperation with the air valve, can send a part of the condensed tail gas into the carrier gas preheater, where it is heated and used as the supplementary carrier gas of the dryer 3 to realize the carrier gas circulation. The heated tail gas can greatly improve the heat exchange efficiency of the dryer 3 compared with normal temperature air. The other part of the condensed tail gas can be directly discharged up to the standard through the exhaust pipe. The air preheater 7 is connected to the dryer 3. The drying system is used to filter, dry, and recycle the tail gas. The drying system uses low-temperature and low-pressure steam at 160 °C as the drying gas source, and the drying gas source is connected to the dryer 3, enabling the indirect drying of the lithium iron phosphate materials inside the dryer 3 by using the low-temperature and low-pressure steam, effectively preventing the oxidation of the lithium iron phosphate materials at high temperature and avoiding the contact of the materials with moisture.

[0028] The control system 11 includes a programmable PLC. The control system 11 is used to control the whole system, and the programmable PLC can perform remote data feedback on the data detected by the temperature sensor 10 and the flow sensor 9. In the main control room, the entire drying system can be controlled to adjust the operating parameters. This automated control not only optimizes the processing quality of the materials but also improves the production efficiency of the materials. It enables remote operation of the system or equipment without the need to be on-site. This remote operation method not only improves work efficiency but also reduces labor costs and on-site safety risks. In addition, the data recording function of the system's automated control helps analyze data fluctuations during the material processing process, providing valuable basis for process optimization and equipment maintenance, thereby further improving production efficiency and product quality.

[0029] The pipeline temperature control system includes a temperature sensor 10 and a flow sensor 9. The pipeline temperature control system is used to monitor the internal temperature of the equipment in real time to maintain the stability of the material processing temperature and moisture, ensuring that the material processing process is in the best state. The temperature sensor 10 is installed on the pipeline, the dryer 3, the sintered plate dust collector 4, and the tail gas condenser 5, enabling real-time monitoring of the temperature of the tail gas, thus facilitating temperature control.

[0030] The automatic valve system includes multiple automatic valves.

[0031] The end of the air preheater 7 is connected to a drain cooler 12, and the drain cooler 12 can recover the condensate water.

[0032] The sintered plate dust collector 4 is equipped with a backwashing device. The backwashing device is used to perform backwashing and dust cleaning operations on the sintered plate dust collector 4, which can clean the dust and prevent blockage of the sintered plate dust collector 4.

[0033] A flushing water pump 6 is connected to the tail gas condenser 5. The end of the flushing water pump 6 is connected to the intermediate water in the factory area, which can flush the inside of the tail gas condenser 5 to improve the heat exchange effect.

[0034] During operation, the first conveyor 1 feeds the wet lithium iron phosphate material into the dryer 3, and low-temperature and low-pressure steam is introduced into the dryer 3 to indirectly dry the material through heat exchange. Then, the tail gas is filtered by the sintered plate dust collector 4, and then the moisture in the filtered tail gas is condensed by the tail gas condenser 5. A part of the condensed tail gas is sent to the carrier gas preheater, where it is heated and used as the supplementary carrier gas for the dryer 3 to achieve carrier gas circulation. The heated tail gas can greatly improve the heat exchange efficiency of the dryer 3 compared with normal-temperature air. Another part of the condensed tail gas can be directly discharged up to the standard through the exhaust stack. The fully enclosed environment effectively isolates the influence of the external environment on the material, greatly reducing the risk of material contamination during the processing, thus significantly improving the purity of the material. While ensuring the production efficiency and product quality, the drying system realizes the maximum utilization of resources and the sustainable development of the environment. At the same time, the system has high automation control operation efficiency and realizes full automation control during the operation process.

[0035] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A novel drying system for lithium iron phosphate materials, characterized in that: It includes a conveying system, a drying system, a control system (11), a pipeline temperature control system and an automatic valve system; The conveying system comprises a first conveyor (1) and a second conveyor (2), and the conveying system is used to convey dry and wet lithium iron phosphate materials; The drying system comprises a drying machine (3), the tail gas end of the drying machine (3) is connected to a sintering plate dust collector (4), the end of the sintering plate dust collector (4) is connected to a tail gas condenser (5), the end of the tail gas condenser (5) is connected to an induced draft fan (8), the end of the induced draft fan (8) is connected to an air preheater (7), the air preheater (7) is connected to the drying machine (3), and the drying system is used to filter, dry and recycle the tail gas; The control system (11) comprises a programmable PLC, and the control system (11) is used to control the whole; The pipeline temperature control system comprises a temperature sensor (10) and a flow sensor (9), and the pipeline temperature control system is used to monitor the internal temperature of the equipment in real time; The automatic valve system includes a plurality of automatic valves; The connections are all pipeline connections.

2. A novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The first conveyor (1) is installed at the feed port of the dryer (3), and the second conveyor (2) is installed at the discharge port of the dryer (3), and both the first conveyor (1) and the second conveyor (2) are configured as screw conveyors.

3. A novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The drying system uses low-temperature and low-pressure steam as a drying gas source, and the drying gas source is connected to the drying machine (3).

4. A novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The temperature sensor (10) is installed on the pipeline, the drying machine (3), the sintering plate dust collector (4) and the tail gas condenser (5).

5. The novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The end of the air preheater (7) is connected to a drain cooler (12).

6. A novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The tail gas condenser (5) is provided with a serpentine coil inside, and circulating water is connected to both ends of the serpentine coil.

7. A novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The sintered plate dust collector (4) is provided with a recoil device, and the recoil device is used to perform recoil cleaning operations on the sintered plate dust collector (4).

8. The novel drying system for lithium iron phosphate materials according to claim 1, characterized in that: The tail gas condenser (5) is connected to a flushing water pump (6), and the end of the flushing water pump (6) is connected to the recycled water in the plant area.

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