A spray dryer for processing lithium iron phosphate

Abstract

The utility model provides a kind of spray drier for lithium iron phosphate processing, it is related to lithium iron phosphate processing technical field, and it includes: dryer, the bottom of dryer is provided with support table, support table inside is provided with storage box, dryer side is provided with heat pipe, dryer top is connected with atomizer, atomizer one end is connected with material pipe, and the other end extends to dryer inside, support table side is equipped with controller, preheating component is set to one side of dryer, for the heat of discharge is guided to hot air port area, reduce energy loss, sieve component is set to the inside of storage box, for screening out the granulosity larger lithium iron phosphate particle.This kind of device can preheat the air that is about to enter the dryer in air inlet pipe by preheating component, realize the recycling of discharged heat, and sieve lithium iron phosphate particles that fall after drying by sieve component, guarantee product quality.

Description

Technical Field

[0001] This utility model relates to the field of lithium iron phosphate processing technology, specifically a spray dryer for lithium iron phosphate processing. Background Technology

[0002] Spray dryers are key equipment in the production of lithium iron phosphate. They are mainly used to process lithium iron phosphate precursor slurry, atomizing the slurry into tiny droplets, which then come into rapid contact with hot air to dry instantly, transforming it into uniform lithium iron phosphate powder. This process avoids powder agglomeration, ensures that the purity meets the standards, and satisfies the performance requirements of battery cathode materials. It also improves the efficiency of subsequent processing and the quality of the final product.

[0003] Traditional equipment has low thermal efficiency, and a large amount of waste heat is directly discharged without being utilized, resulting in high energy consumption. On the other hand, existing equipment lacks an efficient screening system, which makes it easy for some large particles to be mixed in, affecting the final quality of the battery. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a spray dryer for lithium iron phosphate processing. The preheating component can preheat the air that is about to enter the dryer in the air inlet pipe, realize the recovery and utilization of the discharged heat, reduce energy loss, and improve the heat utilization efficiency of the drying process. The screening component can screen the lithium iron phosphate particles that fall after drying, screen out large particles that are difficult to use in battery manufacturing, and ensure product quality.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: A spray dryer for processing lithium iron phosphate includes: a dryer with a support platform at its bottom and a storage box inside the support platform; a heat-conducting pipe on one side of the dryer; an atomizer connected to the top of the dryer, with one end of the atomizer connected to a material pipe and the other end extending into the dryer; a controller installed on one side of the support platform; a preheating component located on one side of the dryer for guiding the discharged heat to the hot air outlet area to reduce energy loss; the preheating component includes: an air outlet pipe, a heat-conducting coil, and a heat-conducting pipe; and a screening component located inside the storage box for screening out lithium iron phosphate particles with larger particle sizes; the screening component includes: a screening plate, a rubber block, and a cam.

[0006] Preferably, the dryer is connected to an air inlet pipe and an air outlet pipe on one side. Both the air inlet pipe and the air outlet pipe contain heat-conducting coils. Two arc-shaped connecting plates are connected to one side of each heat-conducting coil. One side of each arc-shaped connecting plate is connected to both ends of the heat-conducting pipe. The heat-conducting pipe is wrapped with insulation cotton. A fan and an electric heating element are installed inside the air inlet pipe. A temperature sensor is also installed inside the air inlet pipe. Multiple ventilation holes are provided on one side of both the air inlet pipe and the air outlet pipe. Both the air inlet pipe and the air outlet pipe communicate with the dryer through these ventilation holes. A motor a is installed on the top of the dryer. A rotating rod is driven and connected to the bottom of motor a. Connecting rods are connected to both sides of the rotating rod. An arc-shaped scraper is connected to one end of each connecting rod. One side of the arc-shaped scraper is in contact with one of the ventilation holes. Multiple stirring rods are connected to both sides of the rotating rod.

[0007] Preferably, the dryer is connected to a discharge pipe at the bottom, a solenoid valve is installed inside the discharge pipe, a corrugated pipe is connected to one end of the discharge pipe, one end of the corrugated pipe is connected to the top of the storage box, the corrugated pipe communicates with the storage box, a screening plate is installed inside the storage box, a rubber block is installed at the bottom of the storage box, a motor b is installed on one side of the support platform, a rotating rod is driven by one side of the motor b, a cam is connected to the outside of the rotating rod, one end of the cam is in contact with the position of the rubber block, four storage cylinders are connected to the bottom of the storage box, each of the four storage cylinders is provided with a spring, an extension rod is provided at the top of the spring, and one end of the extension rod is connected to the bottom of the storage box.

[0008] The beneficial effects of this utility model are: The advantage of this utility model is that by using the air outlet pipe, heat conduction coil and heat conduction pipe in the preheating component, the heat discharged from the air outlet pipe can be transferred to the air inlet pipe through the heat conduction coil and heat conduction pipe, preheating the air in the air inlet pipe that is about to enter the dryer, realizing the recovery and utilization of discharged heat, reducing energy loss and improving the heat utilization efficiency of the drying process. Secondly, by setting up a screening plate, rubber block, and cam in the screening assembly, the rotating rod drives the cam to rotate under the drive of motor b, continuously impacting the rubber block to vibrate the storage box, which in turn causes the screening plate to vibrate, screening out the lithium iron phosphate particles that fall after drying, thus filtering out large particles that are difficult to use in battery manufacturing and ensuring product quality. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0010] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0011] Figure 3This is a half-sectional view of the overall structure of this utility model.

[0012] Figure 4 This is a cross-sectional view of the storage tube structure of this utility model.

[0013] Figure 5 For the present utility model Figure 2 Enlarged view of point A.

[0014] Figures 1-5 Components: 1. Dryer; 101. Support platform; 102. Storage box; 103. Heat pipe; 104. Atomizer; 105. Controller; 2. Air inlet pipe; 201. Air outlet pipe; 202. Heat-conducting coil; 203. Arc-shaped connecting plate; 3. Fan; 301. Heating element; 302. Temperature sensor; 303. Vent; 4. Motor a; 401. Rotating rod; 402. Connecting rod; 403. Arc-shaped scraper; 404. Stirring rod; 5. Discharge pipe; 501. Corrugated pipe; 6. Screening plate; 601. Rubber block; 602. Motor b; 603. Rotating rod; 604. Cam; 7. Storage cylinder; 701. Spring; 702. Extension rod. Detailed Implementation

[0015] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0016] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 1-5 As shown, a spray dryer for processing lithium iron phosphate includes: a dryer 1, a support platform 101 at the bottom of the dryer 1, a storage box 102 inside the support platform 101, a heat-conducting pipe 103 on one side of the dryer 1, an atomizer 104 connected to the top of the dryer 1, one end of the atomizer 104 connected to a material pipe, and the other end extending into the dryer 1, a controller 105 installed on one side of the support platform 101, a preheating component on one side of the dryer 1 for guiding the discharged heat to the hot air outlet area to reduce energy loss, the preheating component includes: an air outlet pipe 201, a heat-conducting coil 202 and a heat-conducting pipe 103, and a screening component inside the storage box 102 for screening out lithium iron phosphate particles with larger particle sizes, the screening component includes: a screening plate 6, a rubber block 601 and a cam 604.

[0018] The preheating assembly utilizes the air outlet duct 201, heat conduction coil 202, and heat conduction pipe 103 to transfer the heat discharged from the air outlet duct 201 to the air inlet duct 2 via the heat conduction coil 202 and heat conduction pipe 103. This preheats the air in the air inlet duct 2 that is about to enter the dryer 1, achieving heat recovery and utilization, reducing energy loss, and improving the heat utilization efficiency of the drying process. Secondly, the sieving assembly includes the sieving plate 6, rubber block 601, and cam. Driven by the motor b602, the rotating rod drives the cam to rotate, continuously impacting the rubber block 601 to vibrate the storage box 102, which in turn vibrates the sieving plate 6. This sieving process separates the lithium iron phosphate particles that fall after drying, removing large particles that are difficult to use in battery manufacturing and ensuring product quality.

[0019] The dryer 1 has an air inlet pipe 2 and an air outlet pipe 201 connected to one side. Both the air inlet pipe 2 and the air outlet pipe 201 contain heat-conducting coils 202. Each heat-conducting coil 202 has an arc-shaped connecting plate 203 connected to one side. One side of each arc-shaped connecting plate 203 is connected to both ends of a heat-conducting pipe 103. The heat-conducting pipe 103 is wrapped with insulation cotton. The air inlet pipe 2 contains a fan 3 and an electric heating element 301. A temperature sensor 302 is also installed inside the air inlet pipe 2. The air inlet pipe 2 and the air outlet pipe... Multiple ventilation holes 303 are provided on one side of the pipe 201. The air inlet pipe 2 and the air outlet pipe 201 are connected to the dryer 1 through the ventilation holes 303. A motor a4 is installed on the top of the dryer 1. A rotating rod 401 is driven and connected to the bottom of the motor a4. Connecting rods 402 are connected to both sides of the rotating rod 401. An arc-shaped scraper 403 is connected to one end of each connecting rod. One side of the arc-shaped scraper 403 is in contact with multiple ventilation holes 303. Multiple stirring rods 404 are connected to both sides of the rotating rod 401.

[0020] High-temperature gas inside the dryer 1 is discharged from the outlet pipe 201 and flows through the heat-conducting coil 202 inside it. The heat-conducting coil 202 absorbs the heat in the discharged gas and conducts the heat to the heat-conducting pipe 103 through the arc-shaped connecting plate 203. The heat-conducting pipe 103 transfers the heat to the heat-conducting coil 202 inside the inlet pipe 2. At this time, the fan 3 draws in external air into the inlet pipe 2. The air is preheated when it flows through the heated heat-conducting coil 202, and then heated by the electric heating tube 301 before being sent into the dryer 1 through the vent 303. This realizes the recovery and utilization of waste gas heat and significantly reduces energy loss. The temperature sensor 302 monitors the temperature of the hot air after heating. When the temperature is too low, it sends an electrical signal to the controller 105. Then, the controller 105 adjusts the temperature of the electric heating tube 301 to ensure that the temperature meets the equipment operation requirements.

[0021] The dryer 1 is connected to a discharge pipe 5 at the bottom. A solenoid valve is installed inside the discharge pipe 5. One end of the discharge pipe 5 is connected to a corrugated pipe 501. One end of the corrugated pipe 501 is connected to the top of the storage box 102. The corrugated pipe 501 communicates with the storage box 102. A sieve plate 6 is installed inside the storage box 102. A rubber block 601 is installed at the bottom of the storage box 102. A motor b602 is installed on one side of the support platform 101. A rotating rod 603 is connected to one side of the motor b602. A cam 604 is connected to the outside of the rotating rod 603. One end of the cam 604 is in contact with the position of the rubber block 601. Four storage cylinders 7 are connected to the bottom of the storage box 102. A spring 701 is installed inside each of the four storage cylinders 7. An extension rod 702 is installed on the top of the spring 701. One end of the extension rod 702 is connected to the bottom of the storage box 102.

[0022] Furthermore, the dried lithium iron phosphate particles fall onto the screening plate 6 of the collection box 102 through the discharge pipe 5 and the corrugated pipe 501. At the same time, the motor b602 is started, and the motor b602 drives the rotating rod 603 and its cam 604 to rotate continuously. The rotating cam 604 periodically pushes upward and releases the rubber block 601 at the bottom of the collection box 102, causing the entire collection box 102 to generate high-frequency micro-vibrations. This vibration is transmitted to the screening plate 6, which effectively screens the lithium iron phosphate particles on it. Qualified fine particles fall through the mesh of the screening plate 6, while unqualified particles with excessively large particle sizes are intercepted and guided along the surface of the screening plate 6 to the collection point. The four springs 701 and the extension rod 702 at the bottom of the collection box 102 play an auxiliary support and buffering role during the vibration, maintaining the smooth progress of the screening process.

[0023] Working principle: When the equipment starts running, the atomizer 104 first sends the atomized material into the dryer 1. The hot air blown out by the air inlet pipe 2 dries the atomized material and it falls into the dryer 1. Then, the motor a4 drives the rotating rod 401 to stir the material particles. After stirring, the solenoid valve is opened, allowing the material to enter the storage box 102 through the bellows 501.

[0024] Furthermore, the high-temperature gas inside the dryer 1 is discharged from the air outlet duct 201 and flows through the heat-conducting coil 202 inside it. The heat-conducting coil 202 absorbs the heat in the discharged gas and conducts the heat to the heat-conducting pipe 103 through the arc-shaped connecting plate 203. The heat-conducting pipe 103 transfers the heat to the heat-conducting coil 202 inside the air inlet duct 2. At this time, the fan 3 draws in external air into the air inlet duct 2. The air is preheated when it flows through the heated heat-conducting coil 202, and then heated by the electric heating tube 301 before being sent into the dryer 1 through the vent 303. This realizes the recovery and utilization of waste gas heat and significantly reduces energy loss.

[0025] Furthermore, the temperature sensor 302 monitors the temperature of the hot air after heating. When the temperature is too low, it sends an electrical signal to the controller 105. Then, the controller 105 adjusts the temperature of the heating element 301 to ensure that the temperature meets the equipment's operating requirements. The motor a4 drives the rotating rod 401 to rotate, thereby driving the arc-shaped scraper 403 to rotate, preventing the ventilation hole 303 at the air outlet 201 from becoming blocked.

[0026] Furthermore, the dried lithium iron phosphate particles fall onto the screening plate 6 of the collection box 102 through the discharge pipe 5 and the corrugated pipe 501. At the same time, the motor b602 is started, and the motor b602 drives the rotating rod 603 and its cam 604 to rotate continuously. The rotating cam 604 periodically pushes upward and releases the rubber block 601 at the bottom of the collection box 102, causing the entire collection box 102 to generate high-frequency micro-vibrations. This vibration is transmitted to the screening plate 6, which effectively screens the lithium iron phosphate particles on it. Qualified fine particles fall through the mesh of the screening plate 6, while unqualified particles with excessively large particle sizes are intercepted and guided along the surface of the screening plate 6 to the collection point. The four springs 701 and the extension rod 702 at the bottom of the collection box 102 play an auxiliary support and buffering role during the vibration, maintaining the smooth progress of the screening process.

[0027] In addition, all electrical components mentioned in the article are electrically connected to the main controller and power supply. The main controller can be a conventional known device such as a computer that performs control, and the existing publicly available power connection technology will not be described in detail in the article.

[0028] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0029] The above provides a detailed description of a spray dryer for processing lithium iron phosphate provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. 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. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A spray dryer for processing lithium iron phosphate, characterized in that, include: A dryer (1) is provided with a support platform (101) at the bottom of the dryer (1), a storage box (102) is provided inside the support platform (101), a heat conduction pipe (103) is provided on one side of the dryer (1), an atomizer (104) is connected to the top of the dryer (1), one end of the atomizer (104) is connected to a material pipe, and the other end extends into the dryer (1), and a controller (105) is installed on one side of the support platform (101). The preheating component is set on one side of the dryer (1) to guide the discharged heat to the hot air outlet area and reduce energy loss. The preheating component includes: an air outlet pipe (201), a heat-conducting coil (202) and a heat-conducting pipe (103). The screening component located inside the storage box (102) is used to screen out lithium iron phosphate particles with larger particle size. The screening component includes a screening plate (6), a rubber block (601), and a cam (604).

2. The spray dryer for lithium iron phosphate processing according to claim 1, characterized in that, The dryer (1) is connected to an air inlet pipe (2) and an air outlet pipe (201) on one side. Both the air inlet pipe (2) and the air outlet pipe (201) are equipped with heat-conducting coils (202). Both heat-conducting coils (202) are connected to an arc-shaped connecting plate (203) on one side. Both arc-shaped connecting plates (203) are connected to the two ends of the heat-conducting pipe (103) on one side. The heat-conducting pipe (103) is wrapped with heat-insulating cotton.

3. The spray dryer for lithium iron phosphate processing according to claim 2, characterized in that, The air inlet pipe (2) is equipped with a fan (3) and an electric heating tube (301). The air inlet pipe (2) is equipped with a temperature sensor (302). Both the air inlet pipe (2) and the air outlet pipe (201) have multiple ventilation holes (303) on one side. Both the air inlet pipe (2) and the air outlet pipe (201) are connected to the dryer (1) through the ventilation holes (303).

4. The spray dryer for lithium iron phosphate processing according to claim 3, characterized in that, The dryer (1) is equipped with a motor a (4) at the top. The motor a (4) is connected to a rotating rod (401) at the bottom. Both sides of the rotating rod (401) are connected to connecting rods (402). One end of each connecting rod is connected to an arc-shaped scraper (403). One side of the arc-shaped scraper (403) is in contact with multiple ventilation holes (303). Both sides of the rotating rod (401) are connected to multiple stirring rods (404).

5. The spray dryer for lithium iron phosphate processing according to claim 1, characterized in that, The dryer (1) is connected to a discharge pipe (5) at the bottom. A solenoid valve is installed inside the discharge pipe (5). One end of the discharge pipe (5) is connected to a corrugated pipe (501). One end of the corrugated pipe (501) is connected to the top of the storage box (102). The corrugated pipe (501) communicates with the storage box (102).

6. The spray dryer for lithium iron phosphate processing according to claim 5, characterized in that, The storage box (102) is equipped with a sieve plate (6) inside. A rubber block (601) is installed at the bottom of the storage box (102). A motor b (602) is installed on one side of the support platform (101). A rotating rod (603) is driven and connected to one side of the motor b (602). A cam (604) is connected to the outside of the rotating rod (603). One end of the cam (604) is in contact with the position of the rubber block (601).

7. The spray dryer for lithium iron phosphate processing according to claim 6, characterized in that, The storage box (102) has four storage tubes (7) connected to its bottom. Each of the four storage tubes (7) is equipped with a spring (701). An extension rod (702) is provided on the top of the spring (701). One end of the extension rod (702) is connected to the bottom of the storage box (102).

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