Precursor preparation system

Abstract

The utility model provides a precursor preparation system, and belongs to the technical field of ternary precursor production equipment. The precursor preparation system comprises a disc dryer, a feeding bin, a filter, a vacuum pump, a stock bin, a mixer and a drying compressed air device, the disc dryer, the feeding bin, the filter and the vacuum pump are sequentially connected through a negative pressure pipe. The stock bin is used for receiving the materials output from the feeding bin, and the mixer is used for receiving the materials output from the stock bin; at least one of the negative pressure pipe between the disc dryer and the feeding bin, the stock bin and the mixer is provided with a breather valve; and the dry compressed air equipment is used for covering the breather valve and inputting dry compressed air to the breather valve. Therefore, by covering the breather valve and supplying the dry compressed air, the moisture content of the material finally entering the mixer can be reduced, and the influence on the subsequent production process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ternary precursor production equipment, and specifically, to a precursor preparation system. Background Art

[0002] In the preparation process of cathode materials, the preparation process of the precursor accounts for 60%. The quality of the precursor directly affects the performance of the cathode material. Generally, the ternary cathode material is obtained by calcining the mixture of secondary spherical particles formed by agglomeration of fine grains of nickel cobalt manganese hydroxide and lithium hydroxide. At present, the main method for producing ternary precursors is the co-precipitation method (divided into continuous and batch types), that is, nickel salt, cobalt salt, manganese salt or aluminum salt are prepared into a salt solution according to a certain ratio, and nickel cobalt manganese\aluminum hydroxide precipitation (reaction) is formed in the presence of an alkali solution and a complexing agent, and then a qualified product is obtained through steps such as centrifugal washing, drying, mixing, and demagnetization.

[0003] Currently, in the post-system production, a negative pressure conveying system is adopted. Through the vacuum pump to suck negative pressure, the material is sucked back from the outlet of the tray dryer to the silo through the negative pressure pipeline. An air supplement valve is installed on the negative pressure pipeline, and a filter element is installed on the air supplement valve. When the negative pressure is insufficient, the air supplement valve is automatically opened, and the filtered compressed air is inhaled to increase the negative pressure, ensuring that the material can enter the feeding silo through negative pressure. A filter element is installed inside the feeding silo, and the material is intercepted by the filter element, so that the intercepted material enters the silo. The negative pressure after being intercepted by the filter element enters the secondary filter to intercept the material passing through the filter element and then enters the vacuum pump, and the negative pressure circulates in this way. There are breathing valves on the top of the silo and the mixer, and filter elements are installed on the breathing valves. The main function is to introduce filtered compressed air into the silo and the mixer, so that the silo is in a slightly positive pressure state, and the material in the silo can better enter the mixer.

[0004] In the traditional precursor preparation system, the material is generally transferred by negative pressure conveying. After the material is dried by the tray dryer, the moisture content can reach about 0.3%. However, after passing through the negative pressure pipeline, the silo and the mixer, the moisture content in the material often exceeds the standard.

[0005] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a precursor preparation system, which can solve or improve the above technical problems.

[0007] The present utility model can be implemented as follows:

[0008] The present utility model provides a precursor preparation system, which includes a tray dryer, a feeding silo, a filter, a vacuum pump, a silo, a mixer, and a drying compressed air device;

[0009] The pan dryer, the feeding bin, the filter, and the vacuum pump are sequentially connected through a negative pressure pipe; the bin is used to receive the material output from the feeding bin, and the mixer is used to receive the material output from the bin; wherein, at least one of the negative pressure pipe between the pan dryer and the feeding bin, the bin, and the mixer is provided with a breathing valve;

[0010] The dry compressed air device is used to cover the breathing valve and input dry compressed air into the breathing valve.

[0011] In an optional embodiment, the dry compressed air device includes a dry compressed air generator and a sealing cover assembly;

[0012] The dry compressed air generator is connected to the sealing cover assembly. The dry compressed air generator is used to input dry compressed air into the sealing cover assembly, and the sealing cover assembly is covered on the breathing valve.

[0013] In an optional embodiment, the dry compressed air generator includes a first compressed air storage tank, an adsorption dryer, and a second compressed air storage tank;

[0014] The first compressed air storage tank, the adsorption dryer, the second compressed air storage tank, and the sealing cover assembly are sequentially connected;

[0015] The adsorption dryer is used to dry the air output from the first compressed air storage tank and input the dried air into the second compressed air storage tank;

[0016] The second compressed air storage tank is used to input dry compressed air into the sealing cover assembly.

[0017] In an optional embodiment, the adsorption dryer is internally provided with a heating module, and the heating module is used to heat the air entering the adsorption dryer.

[0018] In an optional embodiment, the sealing cover assembly includes a valve and a sealing cover; the dry compressed air generator, the valve, and the sealing cover are sequentially connected. The valve is used to control the dry compressed air generator to output dry compressed air into the sealing cover; the sealing cover is sealed on the breathing valve.

[0019] In an optional embodiment, the valve is a manual ball valve.

[0020] In an optional embodiment, the sealing cover is a homopolypropylene sealing cover.

[0021] In an optional embodiment, two breathing valves are provided on the negative pressure pipe between the pan dryer and the feeding bin, and two sealing cover assemblies are correspondingly provided for the two breathing valves. The two sealing cover assemblies are simultaneously connected to the dry compressed air generator.

[0022] In an optional embodiment, the bin is provided with one breathing valve, and one sealing cover assembly is correspondingly provided for the breathing valve.

[0023] In an alternative embodiment, the mixer is provided with a breathing valve, and a sealing cover assembly is correspondingly arranged for the breathing valve.

[0024] The beneficial effects of the present utility model include:

[0025] The precursor preparation system provided by the present utility model includes a disk dryer, a feeding bin, a filter, a vacuum pump, a material bin, a mixer, and a drying compressed air device; the disk dryer, the feeding bin, the filter, and the vacuum pump are sequentially connected through a negative pressure pipe; the material bin is used to receive the materials output from the feeding bin, and the mixer is used to receive the materials output from the material bin; wherein, at least one of the negative pressure pipe between the disk dryer and the feeding bin, the material bin, and the mixer is provided with a breathing valve; the drying compressed air device is used to cover the breathing valve and input drying compressed air to the breathing valve. By covering the breathing valve and supplying drying compressed air, the moisture content of the materials finally entering the mixer can be reduced. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of the precursor preparation system provided for this embodiment.

[0028] Reference numerals: 1 - disk dryer; 2 - feeding bin; 3 - filter; 4 - vacuum pump; 5 - material bin; 6 - mixer; 7 - breathing valve; 8 - first compressed air storage tank; 9 - adsorption dryer; 10 - second compressed air storage tank; 11 - valve; 12 - sealing cover. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0031] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is habitually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, if terms such as "first", "second", "third", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0033] In addition, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Embodiment

[0036] Please refer to Figure 1 , this embodiment provides a precursor preparation system, which includes a disk dryer 1, a feeding bin 2, a filter 3, a vacuum pump 4, a material bin 5, a mixer 6, and a drying compressed air device.

[0037] The disk dryer 1, the feeding bin 2, the filter 3, and the vacuum pump 4 are sequentially connected through a negative pressure pipe.

[0038] The silo 5 is used to receive the materials output from the feeding silo 2, and the mixer 6 is used to receive the materials output from the silo 5.

[0039] At least one of the negative pressure pipe between the tray dryer 1 and the feeding silo 2, the silo 5, and the mixer 6 is provided with a breather valve 7.

[0040] The dry compressed air equipment is used to cover the breather valve 7 and input dry compressed air into the breather valve 7.

[0041] By covering the breather valve 7 and supplying dry compressed air, the moisture content of the materials finally entering the mixer 6 can be reduced.

[0042] In some alternative embodiments, the filter 3 can be a secondary filter.

[0043] Specifically, the dry compressed air equipment includes a dry compressed air generator and a sealing cover assembly.

[0044] The dry compressed air generator is connected to the sealing cover assembly. The dry compressed air generator is used to input dry compressed air into the sealing cover assembly, and the sealing cover assembly is covered on the breather valve 7.

[0045] The above dry compressed air generator can adopt the mature technology in the prior art to dry and compress the ambient air, and supply dry compressed air to the breather valve 7. The use of the sealing cover assembly can improve the sealing effect and prevent ambient air from entering the system.

[0046] Exemplarily, the dry compressed air generator includes a first compressed air storage tank 8, an adsorption dryer 9, and a second compressed air storage tank 10. The first compressed air storage tank 8, the adsorption dryer 9, the second compressed air storage tank 10, and the sealing cover assembly are connected in sequence.

[0047] The adsorption dryer 9 is used to dry the air output from the first compressed air storage tank 8 and input the dried air into the second compressed air storage tank 10.

[0048] The second compressed air storage tank 10 is used to input dry compressed air into the sealing cover assembly.

[0049] By drying the air through the adsorption dryer 9 and using secondary compression, it can be ensured that the air entering the system remains dry and meets the relevant pressure standards.

[0050] In addition, in order to improve the drying effect, in this embodiment, the adsorption dryer 9 is internally provided with a heating module, and the heating module is used to heat the air entering the adsorption dryer 9. The drying effect is further improved by heating + adsorption.

[0051] In some embodiments, the first compressed air storage tank 8 can be placed outside the workshop, and the second compressed air storage tank 10 can be placed inside the workshop.

[0052] In some alternative embodiments, the seal cover assembly includes a valve 11 and a seal cover 12.

[0053] The dry compressed air generator, the valve 11, and the seal cover 12 are connected in sequence. The valve 11 is used to control the dry compressed air generator to output dry compressed air into the seal cover 12; the seal cover 12 is arranged on the breathing valve 7.

[0054] In some alternative embodiments, the valve 11 can be a manual ball valve. In addition, the valve 11 can also be an electromagnetic valve or an electric valve.

[0055] In some alternative embodiments, the material of the seal cover 12 is polypropylene homopolymer (PPH), that is, the seal cover 12 is a PPH cover. In addition, in other embodiments, the seal cover 12 can also be a metal cover. For reference, a hole (such as a DN25 hole) can be opened at the top of the seal cover 12 to install the valve 11 and the pipeline.

[0056] In some alternative embodiments, two breathing valves 7 are provided on the negative pressure pipe between the tray dryer 1 and the feeding bin 2. Two seal cover assemblies are correspondingly provided for the two breathing valves 7. The two seal cover assemblies are simultaneously connected to the dry compressed air generator. This setting can provide more dry compressed air.

[0057] The bin 5 can be provided with a breathing valve 7, and a seal cover assembly is correspondingly provided for the breathing valve 7.

[0058] The mixer 6 can be provided with a breathing valve 7, and a seal cover assembly is correspondingly provided for the breathing valve 7.

[0059] In addition, in other embodiments, according to different requirements, more than two breathing valves 7 can also be provided on the bin 5 and the mixer 6.

[0060] Optionally, a seal cover assembly is correspondingly provided for each breathing valve 7. In addition, it can also be that the breathing valves 7 share a seal cover assembly.

[0061] Continuing from the above, the working process of the precursor preparation system provided in this embodiment includes:

[0062] The compressed air in the first compressed air storage tank 8 outside the workshop enters the adsorption dryer 9, and then enters the second compressed air storage tank 10 for pressure stabilization. After opening the valve 11 on the sealing cover 12, the vacuum pump 4 is operated to make the pipeline of the subsequent system filled with negative pressure. The material in the tray dryer 1 is sucked into the feeding bin 2 through the negative pressure. When the negative pressure is insufficient, the filtered dry compressed air is inhaled through the breathing valve 7 midway to increase the negative pressure, ensuring that the material can enter the feeding bin 2 through the negative pressure. A filter element is installed in the feeding bin 2 to intercept the material through the filter element, so that the intercepted material enters the material bin 5. The negative pressure after being intercepted by the filter element enters the vacuum pump 4 again after passing through the secondary filter to intercept the material passing through the filter element, and the negative pressure circulates in this way.

[0063] The main function of the breathing valve 7 provided on the negative pressure pipe between the tray dryer 1 and the feeding bin 2 is to improve the material conveying capacity.

[0064] The breathing valves 7 provided at the top of both the material bin 5 and the mixer 6 mainly function to introduce the filtered dry compressed air to make the material bin 5 in a slightly positive pressure state, so that the material in the material bin 5 can better enter the mixer 6.

[0065] Generally, a filter element is installed on the breathing valve 7 for air filtration.

[0066] Since the breathing valve 7 inhales the dry + compressed air output from the first compressed air storage tank 8, the adsorption dryer 9, the second compressed air storage tank 10, the valve 11, and the sealing cover 12, the moisture index can be greatly improved.

[0067] In summary, the precursor preparation system provided by the present invention includes a tray dryer 1, a feeding bin 2, a filter 3, a vacuum pump 4, a material bin 5, a mixer 6, and a dry compressed air device; the tray dryer 1, the feeding bin 2, the filter 3, and the vacuum pump 4 are sequentially connected through a negative pressure pipe; the material bin 5 is used to receive the material output from the feeding bin 2, and the mixer 6 is used to receive the material output from the material bin 5; wherein, at least one of the negative pressure pipe between the tray dryer 1 and the feeding bin 2, the material bin 5, and the mixer 6 is provided with a breathing valve 7; the dry compressed air device is used to cover the breathing valve 7 and input dry compressed air to the breathing valve 7. In this way, by covering the breathing valve 7 and supplying dry compressed air, the moisture content of the material finally entering the mixer 6 can be reduced.

[0068] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A precursor preparation system, characterized in that: It includes a disk dryer, a feeding bin, a filter, a vacuum pump, a material bin, a mixer, and a drying compressed air device; The disk dryer, the feeding bin, the filter, and the vacuum pump are sequentially connected through a negative pressure pipe; the material bin is used to receive the material output from the feeding bin, and the mixer is used to receive the material output from the material bin; wherein, at least one of the negative pressure pipe between the disk dryer and the feeding bin, the material bin, and the mixer is provided with a breathing valve; The drying compressed air device is used to cover the breathing valve and input drying compressed air into the breathing valve.

2. The precursor preparation system according to claim 1, wherein The drying compressed air device includes a drying compressed air generator and a sealing cover assembly; The drying compressed air generator is connected to the sealing cover assembly. The drying compressed air generator is used to input drying compressed air into the sealing cover assembly, and the sealing cover assembly is covered on the breathing valve.

3. The precursor preparation system according to claim 2, characterized in that, The drying compressed air generator includes a first compressed air storage tank, an adsorption dryer, and a second compressed air storage tank; The first compressed air storage tank, the adsorption dryer, the second compressed air storage tank, and the sealing cover assembly are sequentially connected; The adsorption dryer is used to dry the air output from the first compressed air storage tank and input the dried air into the second compressed air storage tank; The second compressed air storage tank is used to input drying compressed air into the sealing cover assembly.

4. The precursor preparation system according to claim 3, characterized in that: The adsorption dryer is internally provided with a heating module, and the heating module is used to heat the air entering the adsorption dryer.

5. The precursor preparation system according to any one of claims 2 to 4, characterized in that, The sealing cover assembly includes a valve and a sealing cover; the drying compressed air generator, the valve, and the sealing cover are sequentially connected. The valve is used to control the drying compressed air generator to output drying compressed air into the sealing cover; the sealing cover is hermetically covered on the breathing valve.

6. The precursor preparation system according to claim 5, characterized in that, The valve is a manual ball valve.

7. The precursor preparation system according to claim 5, characterized in that: The sealing cover is a homopolypropylene sealing cover.

8. The precursor preparation system according to any one of claims 2 to 4, characterized in that, There are two breathing valves provided on the negative pressure pipe between the disk dryer and the feeding bin, and two sealing cover assemblies are correspondingly provided for the two breathing valves. The two sealing cover assemblies are simultaneously connected to the drying compressed air generator.

9. The precursor preparation system according to any one of claims 2 to 4, characterized in that: The material bin is provided with one breathing valve, and one sealing cover assembly is correspondingly provided for the breathing valve.

10. The precursor preparation system according to any one of claims 2 to 4, characterized in that: The mixer is provided with one breathing valve, and one sealing cover assembly is correspondingly provided for the breathing valve.

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