Precision atomization dosing system for cobalt sulfate

Abstract

The utility model discloses a kind of precision atomization feeding systems for cobalt sulfate, system includes solution storage tank and is connected in proper order by solution output pipe front filter, precision metering pump, rear filter, pulsation damper, back pressure regulating valve and atomizing nozzle.The solution storage tank outer wall is equipped with jacket, inside is equipped with magnetic stirrer.System is also equipped with the monitoring unit including first pressure sensor and second pressure sensor, flowmeter, and the controller of connecting precision metering pump and back pressure regulating valve, constitute closed loop control.In addition, system integrates the filter backflush unit consisting of backflush inlet pipe, backflush outlet pipe and bypass, and cleaning agent storage tank connected with cleaning agent output pipe.The utility model uses above-mentioned structure, effectively solved the problem of uneven atomization and pipeline blockage, realized the stable, accurate delivery and atomization of coating agent solution.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium-ion battery material preparation equipment, specifically a precision atomization feeding system for cobalt sulfate. Background Technology

[0002] In the preparation of cathode materials for lithium-ion batteries (such as ternary materials and lithium cobalt oxide), a wet coating process is often used to form a uniform nano-coating layer on the surface of the particles to improve the electrochemical performance and structural stability of the materials. One of the core steps of this process is to precisely and uniformly attach a precursor solution of coating agents such as cobalt sulfate to the base material powder.

[0003] In existing technologies, equipment for conveying and atomizing coating agent solutions typically consists of basic components such as storage tanks, pumps, and nozzles. However, such equipment has significant shortcomings in practical applications: First, the presence of tiny particles in the coating agent solution can easily clog the nozzles, leading to production interruptions; second, flow rate and pressure fluctuations during conveying affect the stability of the atomization effect, resulting in uneven droplet size and consequently, inconsistent coating thickness, severely impacting product consistency. Furthermore, the cleaning process is cumbersome when changing to different types of solutions, affecting production efficiency. Therefore, there is an urgent need for a technical solution that can achieve stable and precise atomized feeding, and possesses excellent anti-clogging and cleaning functions. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a precision atomization feeding system for cobalt sulfate. By optimizing the pipeline structure and control logic, it effectively filters impurities, stabilizes the conveying pressure, and facilitates online cleaning, thereby ensuring the uniformity and stability of the coating agent solution atomization and the reliability of the entire system operation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a precision atomization feeding system for cobalt sulfate, including a solution storage tank, a solution output pipe on the solution storage tank, an atomization nozzle on the output end of the solution output pipe, and a pre-filter, a precision metering pump, a post-filter, a pulsation damper and a back pressure regulating valve arranged sequentially along the conveying direction on the solution output pipe.

[0006] In a preferred embodiment, the outer wall of the solution storage tank is provided with a jacket, and the jacket is provided with an inlet pipe and an outlet pipe.

[0007] In a preferred embodiment, the solution storage tank is equipped with a magnetic stirrer.

[0008] In a preferred embodiment, a first pressure sensor is provided on the solution output pipe between the back pressure regulating valve and the atomizing nozzle; A second pressure sensor and a flow meter are installed on the solution output pipe between the post-filter and the pulsation damper.

[0009] In a preferred embodiment, the first pressure sensor, the second pressure sensor, and the flow meter are all connected to the controller; The precision metering pump and back pressure regulating valve are also connected to the controller.

[0010] In a preferred embodiment, the post-filter is provided with a backwash inlet pipe and a backwash outlet pipe at its inlet and outlet ends, respectively. The backwash inlet and outlet pipes are respectively provided with a first tee and a second tee at their connection points with the inlet and outlet ends of the post-filter.

[0011] In a preferred embodiment, a bypass is connected in parallel to the inlet and outlet ends of the post-filter, and a third tee and a fourth tee are respectively provided at the connection points between the two ends of the bypass and the inlet and outlet ends of the post-filter.

[0012] In a preferred embodiment, a cleaning agent storage tank is also included, which is equipped with a cleaning agent output pipe that is connected to the solution output pipe between the solution storage tank and the pre-filter.

[0013] In a preferred embodiment, the cleaning agent output pipe is provided with a cleaning agent output branch pipe, which is connected to the backwash inlet pipe.

[0014] The precision atomization feeding system for cobalt sulfate provided by this utility model has the following advantages by adopting the above structure: (1) By setting up a dual filtration guarantee of pre-filter and post-filter, and using a combination of precision metering pump, pulsation damper and back pressure regulating valve, pipeline pulsation is effectively eliminated, and the solution pressure and flow rate delivered to the atomizing nozzle are stabilized, thereby ensuring the uniformity of atomized droplet size. (2) By setting up backwashing pipelines and bypasses, the post-filter can be backwashed online or quickly switched without affecting the main operation of the system, which effectively solves the problem of easy filter clogging. (3) A first pressure sensor, a second pressure sensor and a flow meter are set up and linked with the controller to build a real-time monitoring system for key parameters. The controller can accurately adjust the precision metering pump and the back pressure regulating valve through the received feedback signal, forming a closed-loop control system, which significantly improves the automation level and process control accuracy of the entire feeding process. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a block diagram of the control part of this utility model.

[0017] In the diagram: Solution storage tank 1, pre-filter 2, precision metering pump 3, post-filter 4, pulsation damper 5, back pressure regulating valve 6, atomizing nozzle 7, jacket 8, inlet pipe 801, outlet pipe 802, magnetic stirrer 9, first pressure sensor 10, backwash inlet pipe 11, backwash outlet pipe 12, first tee 13, second tee 14, bypass 15, third tee 16, fourth tee 17, second pressure sensor 18, flow meter 19, controller 20, cleaning agent storage tank 21, cleaning agent output pipe 22, cleaning agent output branch pipe 221. Detailed Implementation

[0018] like Figure 1-2 In the present invention, a precision atomizing feeding system for cobalt sulfate includes a solution storage tank 1, a solution output pipe is provided on the solution storage tank 1, an atomizing nozzle 7 is provided on the output end of the solution output pipe, and a pre-filter 2, a precision metering pump 3, a post-filter 4, a pulsation damper 5 and a back pressure regulating valve 6 are sequentially provided on the solution output pipe along the conveying direction.

[0019] The solution storage tank 1 is provided with a jacket 8 on its outer wall, and the jacket 8 is provided with an inlet pipe 801 and an outlet pipe 802.

[0020] In a preferred embodiment, the solution storage tank 1 is equipped with a magnetic stirrer 9.

[0021] In a preferred embodiment, a first pressure sensor 10 is provided on the solution output pipe between the back pressure regulating valve 6 and the atomizing nozzle 7; A second pressure sensor 18 and a flow meter 19 are provided on the solution output pipe between the post-filter 4 and the pulsation damper 5.

[0022] In a preferred embodiment, the first pressure sensor 10, the second pressure sensor 18, and the flow meter 19 are all connected to the controller 20; The precision metering pump 3 and the back pressure regulating valve 6 are also connected to the controller 20.

[0023] In a preferred embodiment, the post-filter 4 is provided with a backwash inlet pipe 11 and a backwash outlet pipe 12 at its inlet and outlet ends, respectively. The backwash inlet pipe 11 and backwash outlet pipe 12 are respectively provided with a first tee 13 and a second tee 14 at the connection points of the inlet and outlet ends of the post-filter 4.

[0024] In a preferred embodiment, a bypass 15 is connected in parallel to the inlet and outlet ends of the post-filter 4, and a third tee 16 and a fourth tee 17 are respectively provided at the connection points between the two ends of the bypass 15 and the inlet and outlet ends of the post-filter 4.

[0025] In a preferred embodiment, the cleaning agent storage tank 21 is further included, and the cleaning agent storage tank 21 is provided with a cleaning agent output pipe 22, which is connected to the solution output pipe between the solution storage tank 1 and the pre-filter 2.

[0026] In a preferred embodiment, the cleaning agent output pipe 22 is provided with a cleaning agent output branch pipe 221, which is connected to the backwash inlet pipe 11.

[0027] The precision atomization feeding system for cobalt sulfate disclosed in this utility model has the following working process: After the system is started, the solution first passes through the pre-filter 2 (a basket filter) to initially filter out any larger particulate impurities, protecting the downstream precision metering pump 3. The precision metering pump 3 (in this embodiment, a servo motor-driven dual-plunger parallel metering pump) serves as the system's power source, pumping the solution out with extremely high precision and repeatability. The pumped solution then passes through the post-filter 4 (a sintered metal filter) for further filtration, ensuring the purity of the solution entering the atomization stage and fundamentally preventing clogging of the atomizing nozzle 7.

[0028] Subsequently, the solution flows through the pulsation damper 5 (a bellows damper is used in this embodiment), absorbing the periodic pulsations generated by the precision metering pump 3, thus stabilizing the liquid flow. Next, the solution passes through the back pressure regulating valve 6 (an electric needle valve is used in this embodiment), which further stabilizes the flow rate by maintaining the system back pressure and provides a stable inlet pressure to the atomizing nozzle 7. Finally, the stable and clean solution is atomized into uniform and fine droplets at the atomizing nozzle 7.

[0029] In addition, this system integrates efficient online cleaning and backwashing functions, as detailed below: The inlet and outlet ends of the post-filter 4 are connected to the backwash inlet pipe 11 and the backwash outlet pipe 12 respectively through the first tee 13 and the second tee 14. When the controller 20 determines that the pressure difference before and after the post-filter 4 is too large, the backwashing program can be started: the normal liquid circuit is closed, and high-pressure cleaning agent or gas is introduced into the backwash inlet pipe 11. After flowing through the interior of the post-filter 4, it is discharged from the backwash outlet pipe 12, which washes away the impurities trapped on the filter element.

[0030] In addition, the inlet and outlet of the post-filter 4 are connected in parallel to a bypass 15 via a third tee 16 and a fourth tee 17. During backwashing or when the post-filter 4 needs to be removed for maintenance, the valve can be switched to allow the solution to pass through the bypass 15, ensuring uninterrupted production.

[0031] The system is also equipped with a separate cleaning agent storage tank 21, with a cleaning agent output pipe 22 connected via a valve to the solution output pipe between the solution storage tank 1 and the pre-filter 2. When solution replacement or system shutdown is required, the CIP (Clean In-Place) program can be initiated: cleaning agent is pumped from the cleaning agent storage tank 21, replacing the original solution and flowing through the entire piping system (including the pre-filter 2, precision metering pump 3, post-filter 4, etc.), achieving a thorough cleaning of the system's interior. The cleaning agent output branch pipe 221 is directly connected to the backwash inlet pipe 11, providing cleaning agent for the backwashing process.

Claims

1. A precision atomizing feeding system for cobalt sulfate, comprising a solution storage tank (1), characterized in that: The solution storage tank (1) is provided with a solution output pipe, and the output end of the solution output pipe is provided with an atomizing nozzle (7). Along the conveying direction, the solution output pipe is provided with a pre-filter (2), a precision metering pump (3), a post-filter (4), a pulsation damper (5), and a back pressure regulating valve (6).

2. The precision atomizing feed system for cobalt sulfate according to claim 1, characterized in that: The solution storage tank (1) is provided with a jacket (8) on its outer wall, and the jacket (8) is provided with an inlet pipe (801) and an outlet pipe (802).

3. A precision atomizing feed system for cobalt sulfate according to claim 1 or 2, characterized in that: The solution storage tank (1) is equipped with a magnetic stirrer (9).

4. The precision atomizing feed system for cobalt sulfate according to claim 1, characterized in that: A first pressure sensor (10) is provided on the solution output pipe between the back pressure regulating valve (6) and the atomizing nozzle (7). A second pressure sensor (18) and a flow meter (19) are provided on the solution output pipe between the post-filter (4) and the pulsation damper (5).

5. A precision atomizing feed system for cobalt sulfate according to claim 4, characterized in that: The first pressure sensor (10), the second pressure sensor (18), and the flow meter (19) are all connected to the controller (20); The precision metering pump (3) and the back pressure regulating valve (6) are also connected to the controller (20).

6. The precision atomizing feeding system for cobalt sulfate according to claim 1, characterized in that: The backwash inlet pipe (11) and backwash outlet pipe (12) are respectively provided at the inlet and outlet ends of the post-filter (4). The backwash inlet pipe (11) and backwash outlet pipe (12) are respectively provided with a first tee (13) and a second tee (14) at the connection points of the inlet and outlet ends of the post-filter (4).

7. A precision atomizing feed system for cobalt sulfate according to claim 6, characterized in that: A bypass (15) is connected in parallel to the inlet and outlet ends of the post-filter (4). A third tee (16) and a fourth tee (17) are respectively provided at the connection points between the two ends of the bypass (15) and the inlet and outlet ends of the post-filter (4).

8. A precision atomizing feed system for cobalt sulfate according to claim 1, characterized in that: It also includes a cleaning agent storage tank (21), which is equipped with a cleaning agent output pipe (22) that is connected to the solution output pipe between the solution storage tank (1) and the pre-filter (2).

9. A precision atomizing feed system for cobalt sulfate according to claim 8, characterized in that: The cleaning agent output pipe (22) is provided with a cleaning agent output branch pipe (221), which is connected to the backwash inlet pipe (11).

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