Stirring, dissolving and filtering device

Abstract

The utility model discloses a stirring, dissolving and filtering device, which relates to the field of lithium iron phosphate production equipment and comprises a carbon source dissolving tank, the top of the carbon source dissolving tank is provided with a feed port, the feed port is connected with a feed pipe, one end of the feed pipe is connected with a raw material measuring bin, and the other end of the feed pipe is connected with a stirring device. The two raw material measuring bins are respectively used for storing a carbon source and polyethylene glycol, a stirring rod is arranged in the carbon source dissolving tank, a stirring paddle is arranged outside the stirring rod, a driving motor is arranged at the top of the carbon source dissolving tank, the rotating end of the driving motor is connected with the stirring rod, and the carbon source and the polyethylene glycol are fully dissolved at a relatively high rotating speed; the two key components are ensured to reach an optimal dissolution state before entering a large dispersion tank, and are pre-filtered by matching with a high-mesh filter after being dissolved in a small tank, so that part of impurities in the solution are effectively removed, the reaction time is shortened, rework and rejection rate caused by incomplete dissolution are reduced, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium iron phosphate production equipment, specifically a stirring, dissolving, and filtering device. Background Technology

[0002] Lithium iron phosphate is a lithium-ion battery electrode material, mainly used in various lithium-ion batteries. Due to its high safety, long life, low cost and environmentally friendly characteristics, it is widely used in the field of energy storage.

[0003] In the production of lithium iron phosphate, the existing raw material dissolution equipment does not have a pretreatment device. Lithium iron phosphate, lithium carbonate, carbon source and polyethylene glycol (PEG) are directly put into a large dispersion tank for stirring. Due to the low rotation speed of the large tank, the carbon source and PEG are not fully dissolved during the mixing process. At the same time, due to the lack of high-mesh filtration equipment in the large tank, some impurities in the raw materials cannot be effectively removed, which affects the purity and performance of the final product. Utility Model Content

[0004] The purpose of this invention is to provide a stirring, dissolving, and filtering device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A stirring, dissolving, and filtering device includes a carbon source dissolving tank. The top of the carbon source dissolving tank has an inlet, and two inlets are connected to feed pipes. One end of each feed pipe is connected to a raw material metering chamber, which stores a carbon source and polyethylene glycol, respectively. A stirring rod is installed inside the carbon source dissolving tank, and a stirring paddle is installed outside the stirring rod. A drive motor is installed at the top of the carbon source dissolving tank, and the rotating end of the drive motor is connected to the stirring rod. An outlet is installed at the bottom of the carbon source dissolving tank, and an outlet pipe is connected to the outlet. One end of the outlet pipe is connected to a pneumatic diaphragm pump, and the pneumatic diaphragm pump is connected to a filter pipe. Two sets of bag filters are connected in series on the filter pipe. A connecting pipe is installed at the end of the filter pipe furthest from the pneumatic diaphragm pump, and one end of the connecting pipe is connected to a dispersion tank.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0008] In one alternative: the pneumatic diaphragm pump is connected to an air inlet pipe for introducing compressed air, and an air source unit is provided on the air inlet pipe.

[0009] In one alternative: the top of the carbon source dissolving tank is provided with a water inlet pipe, one end of which is inserted into the interior of the carbon source dissolving tank and has a cleaning port, and the other end of which is connected to a water inlet for introducing pure water.

[0010] In one alternative: a circulating water pipe is provided on the outer wall of the carbon source dissolving tank, the circulating water pipe is connected to a mold temperature controller, and the mold temperature controller is connected to a circulating water inlet.

[0011] In one alternative: the discharge pipe is connected to a drain outlet.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The stirring, dissolving, and filtering device consists of a carbon source dissolving tank, a raw material metering chamber, and a bag filter. At a high rotation speed, the carbon source and polyethylene glycol are fully dissolved first, ensuring that these two key components reach their optimal dissolution state before entering the large dispersion tank. After dissolution in the small tank, a high-mesh filter is used to pre-filter the solution, effectively removing some impurities. This reduces the filtration difficulty caused by the inability to use high-mesh filtration equipment in the large tank, improves the raw material dissolution efficiency and uniformity, shortens reaction time, reduces rework and scrap rates due to incomplete dissolution, lowers production costs, and improves overall economic efficiency.

[0014] 2. By reducing impurity content through pretreatment, not only is product quality improved, but the amount of waste and subsequent processing difficulties caused by impurities is also reduced. This aligns with the requirements of green manufacturing and energy conservation and emission reduction. It can be quickly integrated into existing production lines and is expected to be widely applied to more lithium iron phosphate production enterprises, driving the improvement of the entire industry's technological level and product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a stirring, dissolving, and filtering device.

[0016] Figure 2 This is a schematic diagram of the carbon source dissolution tank in a stirring, dissolving, and filtering device.

[0017] Figure label annotations: 1-Carbon source dissolving tank, 2-Infeed pipe, 3-Raw material metering bin, 4-Water inlet, 5-Circulating water pipe, 6-Drain outlet, 7-Discharge pipe, 8-Pneumatic diaphragm pump, 9-Filter pipe, 10-Bag filter, 11-Dispersion tank, 12-Connecting pipe, 13-Stirring rod, 14-Stirring paddle, 15-Drive motor, 16-Infeed, 17-Discharge outlet, 18-Mold temperature controller, 19-Circulating water inlet, 20-Water inlet pipe, 21-Cleanup port, 22-Air inlet pipe, 23-Air source unit. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. In the drawings and description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are merely illustrative and not intended to limit the scope of this utility model. Any obvious modifications or changes made to this utility model do not depart from its spirit and scope.

[0019] In one embodiment, such as Figure 1-2 As shown, a stirring, dissolving, and filtering device includes a carbon source dissolving tank 1. The top of the carbon source dissolving tank 1 has two sets of feed inlets 16, each connected to a feed pipe 2. One end of the feed pipe 2 is connected to a raw material metering chamber 3, which is used to store a carbon source and polyethylene glycol, respectively. A stirring rod 13 is installed inside the carbon source dissolving tank 1, and a stirring paddle 14 is installed outside the stirring rod 13. A drive motor 15 is installed on the top of the carbon source dissolving tank 1, and the rotating end of the drive motor 15 is connected to the stirring paddle 14. The rod 13 is connected to accelerate the dissolution rate of the carbon source. The bottom of the carbon source dissolution tank 1 is provided with a discharge port 17, which is connected to a discharge pipe 7. One end of the discharge pipe 7 is connected to a pneumatic diaphragm pump 8, which is connected to a filter pipe 9. Two sets of bag filters 10 are connected in series on the filter pipe 9. A connecting pipe 12 is provided at the end of the filter pipe 9 away from the pneumatic diaphragm pump 8. One end of the connecting pipe 12 is connected to a dispersion tank 11. The filtered solution enters the dispersion tank 11 from the connecting pipe 12.

[0020] The stirring, dissolving, and filtering device consists of a carbon source dissolving tank 1, a raw material metering chamber 3, and a bag filter 10. The device is used in the pretreatment section of the lithium iron phosphate production process. Through a small-capacity reaction tank (i.e., carbon source dissolving tank 1), the carbon source and polyethylene glycol (PEG) are fully dissolved at a high rotation speed, ensuring that these two key components reach their optimal dissolution state before entering the large dispersion tank (i.e., dispersion tank 11). The dissolved raw material is discharged from the carbon source dissolving tank 1 and pre-filtered through a high-mesh filter, effectively removing some impurities in the solution and reducing the filtration difficulty caused by the inability to use high-mesh filtration equipment in the large tank. As an example, the left, right, up, and down positions of the various components shown in the attached figure are only one arrangement method, and the specific positions are set according to specific needs.

[0021] In one embodiment, such as Figure 1 As shown, the pneumatic diaphragm pump 8 is connected to an air inlet pipe 22 for introducing compressed air, and an air source unit 23 is provided on the air inlet pipe 22.

[0022] In one embodiment, such as Figure 1As shown, the top of the carbon source dissolving tank 1 is provided with a water inlet pipe 20. One end of the water inlet pipe 20 is inserted into the interior of the carbon source dissolving tank 1 and is provided with a cleaning port 21. The other end of the water inlet pipe 20 is connected to a water inlet 4 for introducing pure water.

[0023] In one embodiment, such as Figure 1 As shown, a circulating water pipe 5 is provided on the outer wall of the carbon source dissolving tank 1, the circulating water pipe 5 is connected to a mold temperature controller 18, and the mold temperature controller 18 is connected to a circulating water inlet 19.

[0024] In one embodiment, such as Figure 1 As shown, the discharge pipe 7 is connected to the drain port 6, and the sewage discharge of each pipe is connected to the drain port 6. Each pipe is equipped with an airbag-type pulse damper.

[0025] In traditional processes, the large dispersion tank operates at a low speed, resulting in incomplete dissolution of the carbon source and PEG, affecting mixing uniformity. Without significantly modifying the existing large dispersion tank process, a pretreatment section has been added. The carbon source and polyethylene glycol (PEG) used for lithium iron phosphate production are stored separately in raw material metering bin 3. The carbon source and PEG are fully dissolved in a small-capacity reaction tank at a higher speed. The dissolved raw materials are then pre-filtered through a high-mesh filter to effectively remove some impurities from the solution, ensuring that the key components reach their optimal state before entering the main reaction stage. This improvement helps to achieve a continuous, stable, and efficient production process, improves the raw material dissolution efficiency and uniformity, shortens reaction time, reduces rework and scrap rates caused by incomplete dissolution, lowers production costs, and improves overall economic efficiency.

[0026] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A stirring, dissolving, and filtering device, comprising a carbon source dissolving tank, characterized in that, The carbon source dissolving tank is equipped with a feed inlet at the top, and two feed inlets are connected to feed pipes. One end of each feed pipe is connected to a raw material metering bin, which is used to store the carbon source and polyethylene glycol, respectively. A stirring rod is installed inside the carbon source dissolving tank, and a stirring paddle is installed outside the stirring rod. A drive motor is installed at the top of the carbon source dissolving tank, and the rotating end of the drive motor is connected to the stirring rod. A discharge port is installed at the bottom of the carbon source dissolving tank, and a discharge pipe is connected to the discharge port. One end of the discharge pipe is connected to a pneumatic diaphragm pump, and the pneumatic diaphragm pump is connected to a filter pipe. Two sets of bag filters are connected in series on the filter pipe. A connecting pipe is installed at the end of the filter pipe away from the pneumatic diaphragm pump, and one end of the connecting pipe is connected to a dispersion tank.

2. The stirring, dissolving, and filtering device according to claim 1, characterized in that, The pneumatic diaphragm pump is connected to an air inlet pipe for introducing compressed air, and an air source unit is installed on the air inlet pipe.

3. The stirring, dissolving, and filtering device according to claim 1, characterized in that, The top of the carbon source dissolving tank is equipped with a water inlet pipe. One end of the water inlet pipe is inserted into the interior of the carbon source dissolving tank and is equipped with a cleaning port. The other end of the water inlet pipe is connected to a water inlet for introducing pure water.

4. The stirring, dissolving, and filtering device according to claim 1, characterized in that, The outer wall of the carbon source dissolving tank is provided with a circulating water pipe, which is connected to a mold temperature controller, and the mold temperature controller is connected to a circulating water inlet.

5. The stirring, dissolving, and filtering device according to claim 3, characterized in that, The discharge pipe is connected to a sewage outlet.

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