Discharging device for regenerated iron phosphate

Abstract

The invention discloses a discharging device for regenerated iron phosphate. The discharging device comprises a first stock bin, a smashing device, a cooling device and a second stock bin. The crushing device is arranged in the first stock bin and is used for crushing regenerated iron phosphate; the cooling device is arranged on the side wall of the first stock bin and is used for cooling regenerated iron phosphate in the first stock bin; the second stock bin is communicated with a discharge port of the first stock bin, a valve is arranged at the joint of the first stock bin and the second stock bin, and the second stock bin is used for storing regenerated iron phosphate. The crushing device and the cooling device are arranged, so that iron phosphate can be crushed and cooled, the problems that iron phosphate produced by the rotary kiln has a caking phenomenon and the temperature is high are solved, the subsequent packaging procedure is facilitated, and the burden of rear-end packaging procedure equipment is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of ferric phosphate production equipment, and in particular to a feeding device for regenerating ferric phosphate. Background Art

[0002] FePO4 is widely used in industry as a precursor of LiFePO4. At present, the production process routes of LiFePO4 on the market include ferrous oxalate process route and ferrous phosphate process route. The ferrous oxalate process route is favored by manufacturers due to its low cost and simple process, but it is gradually eliminated by the market due to its low yield rate and waste of resources. As an emerging production process route, the ferrous phosphate process has the characteristics of good processing type, strong stability and excellent electrochemical properties compared with other process routes. Based on this, LFP battery black powder can generate battery-grade iron phosphate after full immersion, impurity removal, solid-liquid separation, synthesis, washing and rotary kiln.

[0003] Patent CN111232945A discloses a method for preparing battery-grade iron phosphate, comprising adding phosphorous acid powder into pure water to dissolve into a phosphorous acid solution with a mass fraction of 20-30%, then mixing iron powder or scrap iron with the phosphorous acid solution to react until the iron-phosphorus molar ratio in the solution reaches 0.985-0.995, and then filtering to obtain a first filtrate and a first filter residue; spray drying the first filtrate, wherein the inlet air temperature of the spray drying process is 200-300°C and the discharge temperature is ≤100°C to obtain a dried material; placing the dried material into a rotary kiln, blowing air into it, and calcining it at 600-650°C for 2-4h to obtain a battery-grade iron phosphate.

[0004] However, the iron phosphate produced by the rotary kiln in the above-mentioned prior art has agglomeration phenomenon, and its high temperature is not conducive to subsequent packaging. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a feeding device for regenerated iron phosphate to solve the technical problems in the prior art that the iron phosphate produced by the rotary kiln has agglomeration phenomenon and its high temperature is not conducive to subsequent packaging.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a feeding device for regenerating ferric phosphate, comprising: First silo; A crushing device, the crushing device is arranged in the first silo and is used for crushing the regenerated iron phosphate; a cooling device, the cooling device being disposed on a side wall of the first silo, the cooling device being used to cool the regenerated iron phosphate in the first silo; and The second silo is communicated with the discharge port of the first silo, a valve is provided at the connection between the first silo and the second silo, and the second silo is used to store regenerated iron phosphate.

[0007] In some embodiments, the first silo is elongated in the first direction, and a feed port and a discharge port are respectively provided at the upper and lower ends of the first silo, the feed port and the discharge port are located at the two ends of the first silo along the first direction, the lower end of the first silo is tapered, and the discharge port is connected to the second silo.

[0008] In some embodiments, the crushing device includes a first crushing component and a second crushing component. The first crushing component is arranged in the first silo and is used to break up the regenerated iron phosphate. The second crushing component is arranged at the discharge port and is used to crush the regenerated iron phosphate.

[0009] In some embodiments, the first crushing assembly includes a rotating shaft, a plurality of crushing knives and a driving assembly. The rotating shaft is rotatably installed in the first silo along an axis in a first direction. The plurality of crushing knives are arranged on the rotating shaft at intervals along the first direction. The driving assembly is connected to one end of the rotating shaft.

[0010] In some embodiments, the lengths of the plurality of crushing knives gradually increase in a direction toward the discharge port.

[0011] In some embodiments, a cooling cavity is provided on the side wall of the first silo; The cooling device comprises a water pump assembly, a water tank and a radiator, and the water tank, the water pump assembly, the cooling chamber and the radiator are cyclically connected.

[0012] In some embodiments, the side wall of the first silo is provided with a pump cavity and a water inlet and a water outlet connected to the pump cavity, the water outlet is connected to the cooling cavity, and the water inlet is connected to the water tank; The water pump assembly includes a mounting plate, an internal gear and a crescent plate. The mounting plate is rotatably mounted in the pump cavity. A gear ring is formed on one side of the mounting plate. The internal gear is rotatably mounted in the pump cavity and is located in the gear ring. The internal gear is meshed with the gear ring, and the crescent plate is arranged in the gear ring.

[0013] In some embodiments, the pump chamber is coaxially arranged with the rotating shaft, one end of the rotating shaft extends into the pump chamber, and the mounting plate is mounted on one end of the rotating shaft.

[0014] In some embodiments, a first filter screen is provided in the first silo, and the first filter screen is arranged close to the upper end of the first silo. A second filter screen is provided in the second silo, and the filter hole size of the second filter screen is smaller than the filter hole size of the first filter screen.

[0015] In some embodiments, a fan is provided at the outlet of the second silo.

[0016] Compared with the prior art, the present invention provides a feeding device for regenerated iron phosphate, wherein the first silo and the second silo are connected in sequence in the vertical direction, the first silo is used to be connected to the rotary kiln, the crushing device is arranged in the first silo, and is used to crush the agglomerated iron phosphate, the cooling device is arranged in the first silo, and is used to exchange heat with the iron phosphate in the first silo, thereby reducing the temperature of the iron phosphate, and finally the cooled and crushed iron phosphate is transported to the second silo, and the second silo serves to temporarily store the iron phosphate. By arranging the crushing device and the cooling device, the iron phosphate can be crushed and cooled, thereby solving the problem of agglomeration of the iron phosphate produced by the rotary kiln and its high temperature, which is beneficial to the subsequent packaging process and reduces the burden on the equipment of the back-end packaging process.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a feeding device for regenerating ferric phosphate provided by the present invention; Figure 2 yes Figure 1 A front cross-sectional view of the first silo; Figure 3 yes Figure 1 A left sectional view of the first silo; Figure 4 yes Figure 1 A top sectional view of the first silo; Figure 5 yes Figure 1 Left side cutaway view of the water pump assembly.

[0019] Description of reference numerals: 1-first silo, 11-feed port, 12-discharge port, 13-cooling chamber, 14-first filter screen, 15-water inlet, 16-water outlet, 2-first crushing assembly, 21-rotating shaft, 22-crushing knife, 221-blade, 23-driving assembly, 3-second crushing assembly, 4-water pump assembly, 41-mounting plate, 411-gear ring, 42-internal gear, 43-crescent plate, 5-second silo, 51-second filter element, 6-blower off, 7-valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In order to solve the technical problems in the prior art that the iron phosphate produced through the rotary kiln has agglomeration phenomenon and its high temperature is not conducive to subsequent packaging, the present invention provides a feeding device for regenerated iron phosphate, which can crush and cool the iron phosphate, solve the problem that the iron phosphate produced through the rotary kiln has agglomeration phenomenon and its high temperature, is conducive to the subsequent packaging process, and reduces the burden on the back-end packaging process equipment.

[0022] See also Figure 1 , Figure 1 It is a schematic structural diagram of a feeding device for regenerating iron phosphate in one embodiment of the present invention.

[0023] The present invention provides a feeding device for regenerated iron phosphate, comprising a first silo 1, a crushing device, a cooling device and a second silo 5; the crushing device is arranged in the first silo 1, and is used to crush the regenerated iron phosphate; the cooling device is arranged on the side wall of the first silo 1, and is used to cool the regenerated iron phosphate in the first silo 1; the first silo 1 and the second silo 5 are connected to the discharge port 12 of the first silo 1, and a valve 7 is provided at the connection between the first silo 1 and the second silo 5, and the second silo 5 is used to store the regenerated iron phosphate.

[0024] In this embodiment, the first silo 1 and the second silo 5 are connected in sequence along the vertical direction. The first silo 1 is used to be connected to the rotary kiln. The crushing device is arranged in the first silo 1 to crush the agglomerated iron phosphate. The cooling device is arranged in the first silo 1 to exchange heat with the iron phosphate in the first silo 1, thereby reducing the temperature of the iron phosphate. Finally, the cooled and crushed iron phosphate is transported to the second silo 5. The second silo 5 serves to temporarily store the iron phosphate. By arranging the crushing device and the cooling device, the iron phosphate can be crushed and cooled, thereby solving the problem of agglomeration of the iron phosphate produced by the rotary kiln and its high temperature, which is beneficial to the subsequent packaging process and reduces the burden on the equipment of the back-end packaging process.

[0025] In one embodiment, see Figures 2 to 4 The first silo 1 is elongated in the first direction, and a feed port 11 and a discharge port 12 are respectively provided at the upper and lower ends of the first silo 1. The feed port 11 and the discharge port 12 are located at the two ends of the first silo 1 along the first direction. The lower end of the first silo 1 is tapered, and the discharge port 12 is connected to the second silo 5.

[0026] In this embodiment, the first silo 1 is generally arranged in a rectangular shape, with its length in the first direction and its width in the second direction, the first direction and the second direction being perpendicular to each other, the first silo 1 having a first end and a second end arranged relatively along the first direction, the feed port 11 being arranged close to the first end, and the discharge port 12 being arranged close to the second end, such an arrangement can prolong the residence time of the material in the first silo 1, which is beneficial for the crushing device to fully crush the material, and at the same time, since the first silo 1 and the second silo 5 are connected in sequence in a downward direction, the material transportation between the first silo 1 and the second silo 5 depends on the gravity of the material itself, and in order to facilitate the gathering of materials at the discharge port 12, the lower end of the first silo 1 is tapered, that is, the lower end part of the first silo 1 is generally arranged in a prism shape, such an arrangement allows the material in the first silo 1 to be gathered at the discharge port 12.

[0027] In one embodiment, see Figures 2 to 4 The crushing device includes a first crushing component 2 and a second crushing component 3. The first crushing component 2 is arranged in the first silo 1, and the first crushing component 2 is used to break up the regenerated iron phosphate. The second crushing component 3 is arranged at the discharge port 12, and the second crushing component 3 is used to crush the regenerated iron phosphate.

[0028] In this embodiment, in order to improve the crushing effect, a first crushing component 2 is arranged between the feed port 11 and the discharge port 12, and a second crushing component 3 is arranged near the discharge port 12. The first crushing component 2 is used to preliminarily break up the agglomerated iron phosphate, and at the same time can transport the material from the feed port 11 to the discharge port 12, and the second crushing component 3 can further crush the iron phosphate to ensure the quality of the iron phosphate.

[0029] In one embodiment, see Figures 2 to 4 The first crushing assembly 2 includes a rotating shaft 21, a plurality of crushing knives 22 and a driving assembly 23. The rotating shaft 21 is rotatably installed in the first silo 1 along an axis in a first direction. The plurality of crushing knives 22 are arranged on the rotating shaft 21 at intervals along the first direction. The driving assembly 23 is connected to one end of the rotating shaft 21.

[0030] In this embodiment, both ends of the rotating shaft 21 are rotatably mounted on the side walls of the first end and the second end, and one end of the rotating shaft 21 extends out of the first silo 1 to drive the driving assembly 23 for connection, and a plurality of crushing knives are mounted on the rotating shaft 21 at a certain interval, so that the plurality of crushing knives 22 are distributed throughout the first silo 1 along the first direction, which improves the crushing effect on the one hand and serves the purpose of conveying materials on the other.

[0031] In this embodiment, the crushing knife 22 includes a plurality of blades 221, and the plurality of blades 221 are arranged at intervals along the circumference of the rotating shaft 21, and each of the blades 221 is inclined in the first direction, so that the blades 221 in the plurality of crushing knives 22 are distributed on a plurality of staggered spiral lines, thereby crushing the material and transporting the material from the feed port 11 to the discharge port 12 at the same time.

[0032] In another embodiment, two first crushing assemblies 2 are provided, the two crushing assemblies are spaced apart along the second direction, and the blades 221 in the two crushing assemblies are staggered, such an arrangement can improve the crushing effect.

[0033] Furthermore, the driving assembly 23 includes a driving motor, which is installed on the outside of the first silo 1 , and the main shaft of the driving motor is connected to one end of the rotating shaft 21 , so that the rotating shaft 21 is driven to rotate by the driving motor.

[0034] In one embodiment, see Figures 2 to 4 The lengths of the plurality of crushing knives 22 gradually increase in a direction toward the discharge port 12 .

[0035] In this embodiment, since the lower end of the first silo 1 is tapered, in order to make the blade 221 closer to the bottom of the first silo 1, the length of the blades 221 of the multiple crushing knives 22 gradually increases in the direction toward the discharge port 12, thereby ensuring that each blade 221 is at the same distance from the bottom of the first silo 1, thereby improving the crushing effect.

[0036] In this embodiment, the second pulverizing component 3 is a pulverizer, which is a prior art and will not be described in detail herein.

[0037] In one embodiment, see Figures 2 to 4 The side wall of the first silo 1 is provided with a cooling chamber 13; the cooling device comprises a water pump assembly 4, a water tank and a radiator, and the water tank, the water pump assembly 4, the cooling chamber 13 and the radiator are cyclically connected.

[0038] In the present embodiment, the first silo 1 comprises an outer shell, an inner shell and a cover plate, the upper ends of the outer shell and the inner shell are both open, the inner shell is arranged in the outer shell and spaced from the outer shell, the upper ends of the outer shell and the inner shell are flush, the cover plate is installed on the upper ends of the outer shell and the inner shell, the space between the outer shell and the inner shell constitutes the cooling chamber 13, the internal space of the inner shell is used to accommodate the crushing device and the material, the bottom of the cooling chamber 13 is provided with an inlet, the top of the cooling chamber is provided with an outlet, the inlet is communicated with the water pump assembly 4, and the outlet is communicated with the radiator. When in use, the coolant in the water tank is pumped into the cooling chamber 13 by the water pump assembly 4, so as to exchange heat with the material in the inner shell to achieve the purpose of lowering the temperature of the material, and then the coolant is cooled by the radiator and finally returns to the water tank. The first silo 1 is circulated and cooled by the above-mentioned cooling device, so that the material in the first silo 1 can be quickly reduced, which is more conducive to subsequent packaging.

[0039] In this embodiment, the heat sink is prior art and will not be described in detail herein.

[0040] In one embodiment, see Figure 5 The side wall of the first silo 1 is provided with a pump cavity and a water inlet 15 and a water outlet 16 connected to the pump cavity, the water outlet 16 is connected to the cooling cavity 13, and the water inlet 15 is connected to the water tank; the water pump assembly 4 includes a mounting disk 41, an internal gear 42 and a crescent plate 43, the mounting disk 41 is rotatably mounted in the pump cavity, a gear ring 411 is formed on one side of the mounting disk 41, the internal gear 42 is rotatably mounted in the pump cavity and is located in the gear ring 411, the internal gear 42 is meshed with the gear ring 411, and the crescent plate 43 is arranged in the gear ring 411.

[0041] In this embodiment, the water pump assembly 4 is an internal gear pump, the mounting plate 41 is located at one end of the pump chamber, the ring gear 411, the internal gear 42 and the crescent plate 43 are all located in the space between the mounting plate 41 and the other end of the pump chamber, and the ring gear 411 is adapted to the pump chamber, the mounting plate 41 can drive the ring gear 411 to rotate, the internal gear 42 is located in the ring gear 411, and the internal gear 42 is rotatably installed on the end surface of the pump chamber along the axis in the first direction, the internal gear 42 is meshed with the ring gear 411, the crescent plate 43 is located in the ring gear 411 and installed on the end surface of the pump chamber, a water suction chamber and a water pressure chamber are formed on both sides of the crescent plate 43 in the pump chamber, the water suction chamber is connected to the water inlet 15, and the water pressure chamber is connected to the water outlet 16, the ring gear 411 is driven to rotate by the mounting plate 41, thereby achieving the effect of pumping water.

[0042] In one embodiment, the pump chamber is coaxially arranged with the rotating shaft 21 , one end of the rotating shaft 21 extends into the pump chamber, and the mounting plate 41 is mounted on one end of the rotating shaft 21 .

[0043] In this embodiment, both ends of the rotating shaft 21 extend out of the first silo 1, one end is located outside and connected to the driving motor, and the other end extends into the pump chamber and connected to the mounting disk 41, so that the rotating shaft 21 and the mounting disk 41 are driven to rotate synchronously by the driving motor.

[0044] In one embodiment, see Figure 1 A first filter screen 14 is provided in the first silo 1 , and the first filter screen 14 is arranged close to the upper end of the first silo 1 . A second filter screen is provided in the second silo 5 , and the filter hole size of the second filter screen is smaller than the filter hole size of the first filter screen 14 .

[0045] In this embodiment, in order to filter out impurities and improve the purity of the material, a first filter screen 14 is provided in the first silo 1, and the filter hole diameter of the first filter screen 14 is 10 cm. The first filter screen 14 is located above the crushing device and is arranged close to the feed port 11, so that the material can be preliminarily filtered to prevent large particles of impurities from entering the crushing device. A second filter screen is provided in the second silo 5, and the filter hole diameter of the second filter screen is 5 cm. The second filter screen is used to filter small particles of impurities to prevent impurities from entering the subsequent packaging process.

[0046] In one embodiment, a fan 6 is provided at the discharge port 12 of the second silo 5 .

[0047] It is understandable that the fan 6 is a prior art and will not be described in detail here.

[0048] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the present invention is described in detail: During specific use, the material is transported from the feed port 11 to the first silo 1, and the drive motor is started. The drive motor drives the rotating shaft 21 and the mounting disk 41 to rotate, and the rotating shaft 21 drives the crushing knife 22 to rotate, so that the material can be preliminarily broken up and transported to the discharge port 12. At the same time, the mounting disk 41 drives the internal gear 42 to rotate through the ring gear 411, and then the cooling oil in the water tank is transported to the cooling chamber 13, so as to cool the material in the first silo 1. Subsequently, the valve 7 between the first silo 1 and the second silo 5 is opened, and the second crushing component 3 is started. The material is further crushed by the second crushing component 3 and finally transported to the second silo 5 for storage. When packaging is required, only the fan 6 needs to be started.

[0049] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A feeding device for regenerating ferric phosphate, characterized in that: It includes: First silo; A crushing device, the crushing device is arranged in the first silo and is used for crushing the regenerated iron phosphate; A cooling device, the cooling device is arranged on the side wall of the first silo, and the cooling device is used to cool the regenerated iron phosphate in the first silo; as well as The second silo is communicated with the discharge port of the first silo, a valve is provided at the connection between the first silo and the second silo, and the second silo is used to store regenerated iron phosphate.

2. The feeding device for regenerated ferric phosphate according to claim 1, characterized in that: The first silo is elongated in the first direction, and a feed port and a discharge port are respectively provided at the upper and lower ends of the first silo. The feed port and the discharge port are located at the two ends of the first silo along the first direction. The lower end of the first silo is tapered, and the discharge port is connected to the second silo.

3. The feeding device for regenerated ferric phosphate according to claim 2, characterized in that: The pulverizing device includes a first pulverizing component and a second pulverizing component. The first pulverizing component is arranged in the first silo and is used to break up the regenerated iron phosphate. The second pulverizing component is arranged at the discharge port and is used to crush the regenerated iron phosphate.

4. The feeding device for regenerating ferric phosphate according to claim 3, characterized in that: The first crushing assembly includes a rotating shaft, a plurality of crushing knives and a driving assembly. The rotating shaft is rotatably installed in the first silo along an axis in a first direction. The plurality of crushing knives are arranged on the rotating shaft at intervals along the first direction. The driving assembly is connected to one end of the rotating shaft.

5. The feeding device for regenerated ferric phosphate according to claim 4, characterized in that: The lengths of the plurality of crushing knives gradually increase in a direction toward the discharge port.

6. The feeding device for regenerated ferric phosphate according to claim 4, characterized in that: The side wall of the first silo is provided with a cooling cavity; The cooling device comprises a water pump assembly, a water tank and a radiator, and the water tank, the water pump assembly, the cooling chamber and the radiator are cyclically connected.

7. The feeding device for regenerated ferric phosphate according to claim 6, characterized in that: The side wall of the first silo is provided with a pump cavity and a water inlet and a water outlet connected to the pump cavity, the water outlet is connected to the cooling cavity, and the water inlet is connected to the water tank; The water pump assembly includes a mounting plate, an internal gear and a crescent plate. The mounting plate is rotatably mounted in the pump cavity. A gear ring is formed on one side of the mounting plate. The internal gear is rotatably mounted in the pump cavity and is located in the gear ring. The internal gear is meshed with the gear ring, and the crescent plate is arranged in the gear ring.

8. The feeding device for regenerated ferric phosphate according to claim 7, characterized in that: The pump chamber is coaxially arranged with the rotating shaft, one end of the rotating shaft extends into the pump chamber, and the mounting plate is mounted on one end of the rotating shaft.

9. The feeding device for regenerated ferric phosphate according to claim 1, characterized in that: A first filter screen is provided in the first silo, and the first filter screen is arranged close to the upper end of the first silo. A second filter screen is provided in the second silo, and the filter hole size of the second filter screen is smaller than the filter hole size of the first filter screen.

10. The feeding device for regenerated ferric phosphate according to claim 1, characterized in that: A fan is provided at the discharge port of the second silo.

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