Method for dredging cooling circulation runner of machine barrel of lithium battery diaphragm extruder

Abstract

The invention relates to the technical field of maintenance and cleaning of lithium battery manufacturing equipment, and discloses a lithium battery diaphragm extruder barrel cooling circulation flow channel dredging method which comprises the following steps: step 1, preparing a cleaning agent containing a solvent, a surfactant and a corrosion inhibitor; secondly, the cleaning agent is injected into a cooling circulation flow channel of the machine barrel through a diaphragm pump; thirdly, the cleaning agent is controlled to circulate in the flow channel, and the dynamic process of circulation follows a formula; and 4, the used cleaning agent is discharged, the flow channel is washed with high-purity water, the solvent is xylene, the high carbon deposition dissolving capacity is achieved, the cleaning efficiency is effectively improved, and the cleaning time is shortened. By optimizing the formula of the cleaning agent and using a multi-stage cleaning process, the cleaning efficiency is remarkably improved. By selecting the effective solvent, surfactant and corrosion inhibitor and accurately controlling the concentration and temperature of the cleaning agent, the cleaning agent can more deeply permeate the carbon deposition layer and accelerate the decomposition of the carbon deposition layer.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery manufacturing equipment maintenance and cleaning, and in particular to a method for dredging a cooling circulation flow channel of a barrel of a lithium battery diaphragm extruder. Background Art

[0002] In lithium battery production, the diaphragm extruder is one of the key equipment, and the cleanliness of its barrel cooling circulation channel directly affects production efficiency and product quality. The manufacturing of lithium battery diaphragms requires extremely high precision and cleanliness, so maintaining the cleanliness of the equipment is a necessary condition to ensure product quality and production continuity.

[0003] In the prior art, cleaning the barrel cooling circulation channel of lithium battery separator extruders usually relies on traditional chemical cleaning methods, which include the use of various chemical cleaning agents and mechanical cleaning technologies. These technologies use chemical reactions or physical flushing to remove carbon deposits and other impurities in the channel to maintain efficient operation of the equipment and produce high-quality battery separators.

[0004] However, the main problem with the existing technology is that there is often a lack of effective process control and safety assurance during the cleaning process, which can easily lead to incomplete cleaning or damage to the equipment. The cleaning agent used may corrode the barrel material and reduce the service life of the equipment. At the same time, manual adjustment of cleaning parameters may lead to inconsistent operations, affecting the repeatability and predictability of the cleaning effect. These problems require an improved method that can provide more precise control and higher cleaning efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for unblocking the cooling circulation channel of the barrel of a lithium battery diaphragm extruder, which solves the problem that the traditional cleaning process often lacks effective process control and safety assurance, which easily leads to incomplete cleaning or equipment damage.

[0006] To achieve the above purpose, the present invention is implemented by the following technical scheme: a method for dredging the cooling circulation channel of the barrel of a lithium battery diaphragm extruder, comprising the following steps:

[0007] Step 1: prepare a cleaning agent containing a solvent, a surfactant and a corrosion inhibitor;

[0008] Step 2: injecting the cleaning agent into the cooling circulation channel of the barrel through a diaphragm pump;

[0009] Step 3, controlling the cleaning agent to circulate in the flow channel;

[0010] Step 4: drain the used cleaning agent and rinse the flow channel with high-purity water.

[0011] Preferably, the solvent is xylene, which has a strong ability to dissolve carbon deposits, effectively improving the cleaning efficiency and reducing the cleaning time.

[0012] Preferably, the surfactant is sodium dodecyl sulfate, which reduces the interfacial tension between water and the carbon deposit surface and enhances the interaction between the cleaning agent and the carbon deposit, thereby improving the carbon deposit removal efficiency.

[0013] Preferably, the corrosion inhibitor is benzotriazole, which can effectively prevent the cleaning agent from corroding the barrel material, protect the inner wall of the barrel, and extend the service life of the equipment.

[0014] Preferably, the flow rate of the diaphragm pump is set to 60 L / h and the pressure is set to 3 bar. This configuration ensures that the cleaning agent forms a stable flow state in the barrel cooling circulation flow channel and optimizes the contact effect between the cleaning agent and carbon deposits.

[0015] Preferably, in step 3, the temperature of the cleaning agent is controlled between 50°C and 70°C. This temperature range has been proven to maximize the carbon deposit dissolution rate while avoiding possible damage to the barrel caused by high temperature. The kinetic process of the cycle follows the formula:

[0016]

[0017] Among them, C is the carbon concentration, k is the reaction rate constant, E a is the activation energy, R is the gas constant, and T is the cleaning agent temperature.

[0018] Preferably, the temperature control system utilizes a PID (proportional-integral-differential) control strategy to maintain the temperature of the cleaning agent at 60° C. This temperature is the optimal de-deposition temperature determined by experiments and can effectively accelerate the chemical dissolution process of carbon deposits.

[0019] Preferably, in step 2, the pretreatment step before injecting the cleaning agent includes preheating the flow channel for at least 10 minutes and preliminarily flushing it with clean water to remove loose particles and other easily removable contaminants in the flow channel, creating a cleaner working environment for the injection of the cleaning agent.

[0020] Preferably, the flow and pressure of the diaphragm pump are precisely controlled, with the flow set at 50 L / h to 70 L / h and the pressure controlled at 2 bar to 4 bar to achieve optimal cleaning power and flow characteristics, ensuring that the cleaning agent can fully contact all blocked areas.

[0021] Preferably, in step 4, the rinsing step is performed after the cleaning agent is discharged, and the deionized water used is heated to 50° C. to ensure that the rinsing effect is maximized and all chemical residues are removed to ensure that the environment in the flow channel has no impact on the subsequent production process.

[0022] The present invention provides a method for dredging the cooling circulation channel of a barrel of a lithium battery diaphragm extruder. It has the following beneficial effects:

[0023] 1. The present invention significantly improves cleaning efficiency by optimizing the formulation of the cleaning agent and using a multi-stage cleaning process. By selecting effective solvents, surfactants and corrosion inhibitors, and accurately controlling the concentration and temperature of the cleaning agent, the cleaning agent can penetrate the carbon deposit layer more deeply and accelerate its decomposition. This efficient cleaning process not only shortens the total time required for cleaning, but also ensures more thorough cleaning, thereby reducing equipment downtime and improving production efficiency.

[0024] 2. The present invention can significantly reduce the erosion of equipment materials by chemical cleaning by using specific corrosion inhibitors and precise temperature control, especially the protection of metal parts. Adding corrosion inhibitors such as benzotriazole during the cleaning process can effectively prevent corrosion and chemical damage, thereby extending the service life of the equipment. In addition, by avoiding the use of excessively high temperatures, the present invention protects the structural integrity of the internal equipment, further ensuring the long-term stable operation of the equipment.

[0025] 3. The present invention can accurately control the flow, pressure and temperature of the cleaning agent through the automated control system, greatly reducing the safety risks caused by human error. The automated system ensures that all parameters in the cleaning process are always in the best state, reducing potential dangers during operation, such as chemical leakage, overheating and other problems. This increased degree of automation also helps to achieve more consistent cleaning results and avoid accidents caused by improper operation.

[0026] 4. The present invention can achieve precise control of the cleaning process by using advanced sensors and feedback control systems. This control system not only ensures that each cleaning can meet the predetermined standards, but also improves the repeatability and predictability of the process. This is crucial to ensure product quality and improve production efficiency, especially in large-scale production, to ensure the consistency and reliability of each batch of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] Please see attached Figure 1 The embodiment of the present invention provides a method for clearing the cooling circulation channel of a barrel of a lithium battery diaphragm extruder, comprising the following steps:

[0031] Step 1: prepare a cleaning agent containing a solvent, a surfactant and a corrosion inhibitor;

[0032] Step 2: injecting the cleaning agent into the cooling circulation channel of the barrel through a diaphragm pump;

[0033] Step 3: Control the circulation of the cleaning agent in the flow channel, where the dynamic process of the circulation follows the formula:

[0034]

[0035] Among them, C is the carbon concentration, k is the reaction rate constant, E a is the activation energy, R is the gas constant, and T is the cleaning agent temperature;

[0036] Step 4: Drain the used cleaning agent and rinse the flow channel with high-purity water.

[0037] Further, step 1: preparation of cleaning agent

[0038] In this embodiment, the preparation of the cleaning agent involves selecting and mixing specific chemical components to form an effective cleaning combination. First, xylene is selected as the main solvent, which is particularly suitable for organic carbon deposits that are difficult to remove due to its excellent carbon deposit solubility. The selection of xylene is based on its wide use in industrial applications and its compatibility with mechanical equipment materials. Next, 10% of sodium dodecyl sulfate is added as a surfactant, which is sufficient to reduce the interfacial tension between the solvent and the carbon deposits and enhance the penetration of the cleaning agent. Finally, 0.5% of benzotriazole is mixed in as a corrosion inhibitor to protect the metal parts from any potential chemical attack. All ingredients are quantified and mixed according to industrial standards to ensure the quality and effectiveness of the cleaning agent.

[0039] Step 2: Injection of cleaning agent

[0040] In this embodiment, a diaphragm pump with flow and pressure adjustment function is used to inject the cleaning agent into the cooling circulation flow channel of the barrel. First, ensure the tightness and integrity of all connecting pipelines to avoid leakage of cleaning agent. The flow and pressure of the diaphragm pump are set to 60L / h and 3bar. This configuration can make the cleaning agent form a stable and uniform flow in the flow channel, ensuring that each part is fully covered. During the injection process, the monitoring system will display the flow and pressure data in real time to ensure the accuracy of the operation.

[0041] Step 3: Circulation cleaning

[0042] In this embodiment, the circulation of the cleaning agent in the flow channel follows a specific chemical kinetic model. Specifically, the following kinetic equation is used to control and optimize the cleaning process:

[0043]

[0044] Where C represents the concentration of carbon deposits in the flow channel, k is the reaction rate constant determined based on experimental data, and E a is the activation energy, determined by previous laboratory tests, R is the universal gas constant, and T is the operating temperature of the cleaning agent. This formula helps the operator adjust the cycle time and intensity based on real-time temperature readings to achieve the best cleaning results. The temperature is controlled at 60°C, monitored by a temperature sensor and adjusted through an automatic feedback system to maintain a constant temperature.

[0045] Step 4: Drain and rinse

[0046] In this embodiment, after the used cleaning agent is discharged, it is immediately rinsed with high-purity water preheated to 50°C to completely remove all chemical residues. This rinsing process is performed at least three times, each lasting 15 minutes, to ensure the cleanliness of the inner wall of the flow channel. The setting of this rinsing temperature and number of times is based on a deep understanding of the chemical properties of the cleaning agent and its interaction with the barrel material to ensure that the optimal cleaning effect is achieved without damaging the equipment. After each rinse, the concentration of residual chemicals is detected by the sensor built into the flow channel to ensure that it is below the safety standard.

[0047] The solvent is xylene, which has a strong ability to dissolve carbon deposits, effectively improving the cleaning efficiency and reducing the cleaning time.

[0048] The surfactant is sodium dodecyl sulfate, which reduces the interfacial tension between water and the surface of carbon deposits and enhances the interaction between the cleaning agent and carbon deposits, thereby improving the efficiency of carbon deposit removal.

[0049] The corrosion inhibitor is benzotriazole, which can effectively prevent the cleaning agent from corroding the barrel material, protect the inner wall of the barrel, and extend the service life of the equipment.

[0050] The flow rate of the diaphragm pump is set to 60L / h and the pressure is set to 3bar. This configuration ensures that the cleaning agent forms a stable flow state in the cooling circulation flow channel of the barrel and optimizes the contact between the cleaning agent and carbon deposits.

[0051] In step three, the temperature of the cleaning agent is controlled between 50°C and 70°C. This temperature range has been proven to maximize the carbon deposit dissolution rate while avoiding possible damage to the barrel caused by high temperature.

[0052] The temperature control system uses a PID (proportional-integral-differential) control strategy to maintain the temperature of the cleaning agent at 60°C. This temperature is the optimal de-deposition temperature determined through experiments and can effectively accelerate the chemical dissolution process of carbon deposits.

[0053] In step 2, the pretreatment step before injecting the cleaning agent includes preheating the flow channel for at least 10 minutes and initially flushing it with clean water to remove loose particles and other easily removable contaminants in the flow channel, creating a cleaner working environment for the injection of the cleaning agent.

[0054] The flow and pressure of the diaphragm pump are precisely controlled, with the flow set at 50L / h to 70L / h and the pressure controlled at 2bar to 4bar to achieve optimal cleaning power and flow characteristics, ensuring that the cleaning agent can fully contact all blocked areas.

[0055] In step 4, the rinsing step is performed after the cleaning agent is discharged. The deionized water used is heated to 50°C to ensure the maximum rinsing effect and remove all chemical residues to ensure that the environment in the flow channel has no impact on the subsequent production process.

[0056] Preferred embodiment 1: High-efficiency cleaning agent formula

[0057] Technical Solution

[0058] In the preferred embodiment, the cleaning agent formulation is optimized to include a high-performance organic solvent mixture to enhance the cleaning ability of insoluble carbon deposits.

[0059] Recipe Description:

[0060] The cleaning agent contains 35% xylene and 15% cyclohexane. This mixed solvent can provide stronger dissolving power to deal with carbon deposits and grease accumulated over a long period of time.

[0061] Add 5% of non-ionic surfactant such as polyoxyethylene sorbitan ester to improve the wettability and penetration ability of the cleaning agent on the flow channel surface.

[0062] 0.7% environmentally friendly corrosion inhibitor (such as benzimidazole) is used to protect the internal metal material from chemical corrosion.

[0063] Technical advantages:

[0064] By using mixed organic solvents, the cleaning ability is significantly improved, especially for the stubborn carbon deposits formed in long-term operating equipment.

[0065] The use of non-ionic surfactants increases the contact efficiency between the cleaning agent and carbon deposits, making the cleaning more thorough.

[0066] The choice of corrosion inhibitors takes into account environmental impact and material protection, providing a more sustainable cleaning solution.

[0067] Preferred embodiment 2: Intelligent temperature control system

[0068] Technical Solution

[0069] In this preferred embodiment, an intelligent temperature control system is introduced to accurately adjust the temperature of the cleaning agent to maximize the cleaning efficiency and prevent thermal damage to mechanical equipment.

[0070] System Configuration:

[0071] The cleaning system is equipped with temperature sensors and microprocessor-controlled heating elements that can adjust heating or cooling based on real-time temperature feedback of the cleaning agent in the flow channel.

[0072] The temperature control range is set between 45°C and 75°C and can be adjusted according to the nature of the carbon deposits and the chemical composition of the cleaning agent.

[0073] Kinetic Model Integration:

[0074] Using the kinetic formula Dynamically adjust the cleaning temperature, where E a The values ​​of and k are preset and adjusted according to the type of cleaning agent and the expected cleaning difficulty.

[0075] The temperature adjustment strategy is based on the optimization of the carbon dissolution rate, ensuring the most suitable temperature is applied in different cleaning stages.

[0076] Technical advantages:

[0077] By intelligently controlling the temperature of the cleaning agent, the optimal chemical reaction rate can be achieved in different cleaning stages to effectively remove carbon deposits.

[0078] The system's automatic adjustment function reduces dependence on operators and improves the safety and repeatability of operations.

[0079] Highly precise temperature control also helps to save energy and reduce environmental impact, as overheating or unnecessary energy consumption can be avoided.

[0080] Comparative Example 1:

[0081] High pressure water jet cleaning

[0082] Detailed steps:

[0083] Equipment safety and preparation:

[0084] Make sure all related equipment is powered off to prevent electrical accidents during the cleaning process.

[0085] Check the integrity of the high-pressure water gun and connecting hose to ensure there is no wear or leakage.

[0086] Connection and configuration:

[0087] Connect the high-pressure washer to the water source and make sure all connection points are tight and leak-free.

[0088] Adjust the pressure setting of the water gun. It is usually recommended to set it between 2000 and 3000PS I, depending on the degree of dirt and the sensitivity of the material.

[0089] To perform a clean:

[0090] Systematically start at one end point and slowly move the water jet along the flow path, making sure to clean each section evenly.

[0091] Pay special attention to bends and seams in the flow path, as these areas are likely to collect more dirt.

[0092] Flushing and inspection:

[0093] Rinse thoroughly with normal pressure water to remove dirt and residue loosened by the high pressure water jet.

[0094] Perform a visual inspection of the cleaned flow path and repeat the cleaning process if necessary to ensure thorough cleaning.

[0095] Drying and system restart:

[0096] Use compressed air to dry the inside of the flow channel to ensure that no moisture remains.

[0097] Restart the device and perform a test run to confirm normal operation of the system.

[0098] Comparative Example 2:

[0099] Chemical cleaning

[0100] Detailed steps:

[0101] Choosing the appropriate cleaning chemical:

[0102] Choose the appropriate cleaning chemical based on the type of carbon deposits and material compatibility. For example, for grease-based carbon deposits, choose an alkaline cleaning agent.

[0103] Solvent preparation and safety measures:

[0104] In a well-ventilated area, prepare the cleaning solution in the proportions recommended by the manufacturer.

[0105] Wear appropriate personal protective equipment such as gloves, goggles and protective clothing.

[0106] Cleaning agent injection and circulation:

[0107] Use a pump system to inject the cleaning agent into the cooling channels and make sure the entire system is filled with cleaning agent.

[0108] Allow the cleaning agent to circulate in the system for a certain period of time, usually 30 minutes to several hours, depending on the severity of the dirt.

[0109] Drain and flush the system:

[0110] Safely discharge used cleaning agents and dispose of chemical waste in compliance with environmental regulations.

[0111] Flush the system thoroughly with plenty of clean water to ensure all chemical residue is removed.

[0112] System inspection and drying:

[0113] Inspect the flow channel after cleaning to confirm the cleaning effect.

[0114] Use compressed air to blow the system dry, making sure no water remains.

[0115] System reset and functional test:

[0116] Reassemble any components that were removed and power up the system for a functional test to ensure everything is functioning properly.

[0117] Experimental design

[0118] Sample selection: Select three lithium battery separator extruders of the same model and age.

[0119] Inspection before cleaning: Record the initial carbon deposition status and flow channel blockage of each device.

[0120] Implementation of cleaning:

[0121] Equipment A: Use high-pressure water jet cleaning.

[0122] Equipment B: Chemical cleaning is used.

[0123] Equipment C: adopts the cleaning method of embodiment 1 of the present invention.

[0124] Post-cleaning inspection:

[0125] The carbon deposit removal rate of each equipment was measured after cleaning.

[0126] Record the cleaning time required.

[0127] Assess the interior of the device for chemical or physical damage.

[0128] Test the functionality and efficiency of the device after restart.

[0129] Data recording and analysis: Record all relevant data and conduct statistical analysis and comparison.

[0130]

[0131] Table 1

[0132] Experimental comparative analysis

[0133] Efficiency: From the data, it can be seen that the cleaning method of Example 1 has the best performance in carbon deposit removal rate, reaching 95%. In addition, the cleaning time is also the shortest, only 1.5 hours, which is more efficient than the other two methods.

[0134] Safety: neither Example 1 nor high-pressure water jet caused damage to the equipment, while chemical cleaning caused slight corrosion, indicating that Example 1 has obvious advantages in equipment protection.

[0135] Environmental impact: The cleaning agent used in Example 1 is more environmentally friendly and does not require the treatment of hazardous chemical wastes. Compared with chemical cleaning methods, it has a lower environmental impact.

[0136] Equipment performance: The functional test results show that the equipment cleaned in Example 1 performs as "excellent", which indicates that this method not only cleans thoroughly, but also helps to restore or even improve the operating efficiency of the equipment.

[0137] Experimental data show that the method for clearing the cooling circulation channel of the barrel of a lithium battery diaphragm extruder of Example 1 of the present invention is superior to the traditional high-pressure water jet cleaning and chemical cleaning methods in terms of carbon deposit removal efficiency, equipment protection, operation time and environmental friendliness. These results confirm the practical application value of Example 1 in improving production efficiency, reducing operating costs and protecting the environment.

[0138] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel, characterized in that: The following steps are involved: Step 1: prepare a cleaning agent containing a solvent, a surfactant and a corrosion inhibitor; Step 2: injecting the cleaning agent into the cooling circulation channel of the barrel through a diaphragm pump; Step 3, controlling the cleaning agent to circulate in the flow channel; Step 4: drain the used cleaning agent and rinse the flow channel with high-purity water.

2. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: The solvent is xylene, which has a strong ability to dissolve carbon deposits, effectively improving the cleaning efficiency and reducing the cleaning time.

3. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: The surfactant is sodium dodecyl sulfate, which reduces the interfacial tension between water and the carbon deposit surface and enhances the interaction between the cleaning agent and the carbon deposit, thereby improving the carbon deposit removal efficiency.

4. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: The corrosion inhibitor is benzotriazole, which can effectively prevent the cleaning agent from corroding the barrel material, protect the inner wall of the barrel, and extend the service life of the equipment.

5. The method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: The flow rate of the diaphragm pump is set to 60L / h and the pressure is set to 3bar. This configuration ensures that the cleaning agent forms a stable flow state in the barrel cooling circulation flow channel and optimizes the contact between the cleaning agent and carbon deposits.

6. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: In step 3, the temperature of the cleaning agent is controlled between 50°C and 70°C. This temperature range has been proven to maximize the carbon deposit dissolution rate while avoiding possible damage to the barrel caused by high temperature. The kinetic process of the cycle follows the formula: Among them, C is the carbon concentration, k is the reaction rate constant, E a is the activation energy, R is the gas constant, and T is the cleaning agent temperature.

7. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: The temperature control system uses a PID (proportional-integral-differential) control strategy to maintain the temperature of the cleaning agent at 60° C. This temperature is the optimal de-deposition temperature determined by experiments and can effectively accelerate the chemical dissolution process of carbon deposits.

8. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: In step 2, the pretreatment step before injecting the cleaning agent includes preheating the flow channel for at least 10 minutes and initially flushing it with clean water to remove loose particles and other easily removable contaminants in the flow channel, creating a cleaner working environment for the injection of the cleaning agent.

9. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 5, characterized in that: The flow and pressure of the diaphragm pump are precisely controlled, with the flow set at 50L / h to 70L / h and the pressure controlled at 2bar to 4bar to achieve optimal cleaning power and flow characteristics, ensuring that the cleaning agent can fully contact all blocked areas.

10. A method for dredging the cooling circulation channel of a lithium battery diaphragm extruder barrel according to claim 1, characterized in that: In step 4, the rinsing step is performed after the cleaning agent is discharged, and the deionized water used is heated to 50° C. to ensure that the rinsing effect is maximized and all chemical residues are removed to ensure that the environment in the flow channel has no impact on the subsequent production process.

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