Method for cleaning impregnated graphite

Abstract

The invention relates to the technical field of cleaning after graphite impregnation, and discloses a cleaning method after graphite impregnation, and the scheme comprises the following steps: step 1, high-pressure water washing; step 2, steam cleaning; step 3, ultrasonic cleaning; step 4, cleaning with a solvent; 5, chemical reagent cleaning is carried out, and second-step decomposition cleaning can be carried out on residual sticky stains after pure water flushing during steam cleaning, so that the cleaning effect is enhanced; by arranging ultrasonic cleaning, the area which cannot be covered in the steam cleaning process can be cleaned, so that the comprehensiveness in the cleaning process can be effectively improved, and residues are avoided; after ultrasonic cleaning is finished, stains on the surface area of graphite can be effectively cleaned, but some dead angle areas are prone to occurring due to different shapes of different graphite products, and although ultrasonic waves can clean and fall off the stains, the stains cannot be discharged, so that the cleaning effect is good. The cleaning effect can be achieved in a decomposition mode through solvent soaking at the moment.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning graphite after impregnation, and in particular to a method for cleaning graphite after impregnation. Background Art

[0002] Graphite, also known as black lead, is an allotrope of carbon with a relative density of 2.256g / cm3. Graphite is opaque and greasy to the touch, with colors ranging from iron black to steel gray, and can be crystalline, flake, scaly, striped, or layered. Graphite has low hardness, stable chemical properties, and is not easy to react with acids, alkalis, and other agents. It is resistant to high temperatures, corrosion, thermal shock, and radiation, has high strength, good toughness, and has physical and chemical properties such as self-lubrication, electrical conductivity, and thermal conductivity. It is widely used in metallurgy, machinery, electronics, military industry, national defense, aerospace, and other fields.

[0003] However, in actual applications, after the impregnation operation is completed, the impregnating agent remaining on the surface of most existing hand-held graphite pallets will affect the subsequent graphite processing operations. Although it is usually cleaned by flushing, a single flushing cleaning method cannot effectively and comprehensively achieve the purpose of thorough cleaning, which will in turn affect the subsequent processing operations and is not conducive to promotion and use.

[0004] Therefore, those skilled in the art provide a method for cleaning graphite after impregnation to solve the problems raised in the above background technology. Summary of the invention

[0005] In order to solve the problem that the single flushing cleaning method proposed in the above background technology cannot effectively and comprehensively achieve the purpose of thorough cleaning, which will affect subsequent processing operations and is not conducive to promotion and use, the present application provides a cleaning method after graphite impregnation.

[0006] The present application provides a method for cleaning graphite after impregnation, which adopts the following technical solution: comprising the following steps:

[0007] Step 1: High-pressure water washing;

[0008] Step 2: Steam cleaning;

[0009] Step 3: Ultrasonic cleaning;

[0010] Step 4: Solvent cleaning;

[0011] Step 5: Chemical cleaning.

[0012] Preferably, the high-pressure water washing includes pure water washing and auxiliary agent washing:

[0013] S1: Pure water flushing: Use a high-pressure water gun or high-pressure water cleaning equipment to flush the impregnated graphite products at a certain pressure and flow rate. When flushing, pay attention to adjusting the water pressure and the angle of the nozzle to ensure that all parts of the graphite surface can be flushed and the impregnating agent and impurities on the surface are washed away;

[0014] S2: Add additives for flushing: Adding a small amount of surfactants or corrosion inhibitors to high-pressure water can improve the cleaning effect and prevent the graphite surface from being corroded or damaged during the cleaning process;

[0015] High-pressure water washing can effectively carry out preliminary cleaning of large particles and impregnants that are easy to wash off the graphite surface.

[0016] Preferably, the steam cleaning includes saturated steam cleaning and superheated steam cleaning:

[0017] S1: Saturated steam cleaning: Put the impregnated graphite products into the steam cleaning equipment and pass saturated steam for cleaning. The high temperature and impact force of the steam can quickly melt or soften the impregnant and fall off from the graphite surface. The cleaning time is generally 10-20 minutes. After cleaning, let the graphite products cool naturally or blow dry with cold air;

[0018] S2: Superheated steam cleaning: Superheated steam has higher temperature and energy, and has better cleaning effect; but when using superheated steam for cleaning, pay attention to controlling the temperature and pressure of the steam to avoid thermal shock or damage to the graphite products;

[0019] During steam cleaning, sticky stains remaining after pure water rinsing can be decomposed and cleaned in a second step to enhance the cleaning effect.

[0020] Preferably, the ultrasonic cleaning includes direct ultrasonic cleaning and ultrasonic cleaning combined with solvent:

[0021] S1: Direct ultrasonic cleaning: put the impregnated graphite product into an ultrasonic cleaning machine, add an appropriate amount of cleaning solvent, turn on the ultrasonic cleaning equipment, and the cleaning time is usually 15-30 minutes. The high-frequency vibration of the ultrasonic wave can quickly separate the impregnant and impurities from the graphite surface;

[0022] S2: Combined with solvent ultrasonic cleaning: first soak the graphite product with solvent for a period of time to dissolve or soften the impregnant, and then perform ultrasonic cleaning, which can improve the cleaning efficiency and effect;

[0023] Ultrasonic cleaning can clean areas that cannot be covered during steam cleaning, thereby effectively improving the comprehensiveness of the cleaning process and avoiding residue.

[0024] Preferably, the solvent cleaning includes organic solvent cleaning and water-based cleaning agent cleaning:

[0025] S1: Organic solvent cleaning: According to the type of impregnating agent, select a suitable organic solvent, such as alcohol, acetone, toluene, etc., and immerse the impregnated graphite products in the organic solvent. The immersion time depends on the actual situation, generally ranging from a few hours to a day. During this period, it can be properly stirred or shaken, and then taken out and rinsed with clean water;

[0026] S2: Cleaning with water-based cleaning agent: For some water-soluble impregnating agents, water-based cleaning agents can be used for cleaning. Put the graphite products into a cleaning tank containing an appropriate amount of water-based cleaning agent, heat it to a certain temperature, generally between 40℃-60℃, soak for a period of time, and then rinse it with clean water;

[0027] After ultrasonic cleaning, the stains on the graphite surface can be effectively cleaned. However, due to the different shapes of different graphite products, some dead corners are prone to appear. Although ultrasonic waves can remove the stains, they cannot remove them. At this time, solvent immersion can achieve the cleaning effect by decomposition.

[0028] Preferably, the chemical reagent cleaning includes acid-base solution cleaning and redox reagent cleaning:

[0029] S1: Acid and alkali solution cleaning: According to the properties of the impregnating agent, select the appropriate acid and alkali solution for cleaning. For example, for some metal salt impregnating agents, dilute hydrochloric acid or dilute sulfuric acid solution can be used for cleaning; for some alkaline impregnating agents, dilute sodium hydroxide solution can be used for cleaning;

[0030] S2: Redox reagent cleaning: For some impregnants that are difficult to clean with acid and alkali solutions, redox reagents can be used for cleaning. For example, for some organic polymer impregnants, oxidants such as hydrogen peroxide and sodium hypochlorite can be used for cleaning;

[0031] Chemical cleaning can be used to destructively clean stubborn residual stains in local areas of graphite products, but this type of cleaning requires the use of special protective equipment to avoid danger.

[0032] Preferably, the drying process is to place the cleaned graphite product in a cool and ventilated place and dry it naturally. During the drying process, the graphite product needs to be turned over regularly to improve the uniformity of drying and avoid stacking.

[0033] In summary, this application includes the following beneficial technical effects:

[0034] 1. By setting up high-pressure water washing, the large particles and impregnants on the graphite surface that are easy to wash away can be effectively cleaned initially.

[0035] 2. By setting the steam cleaning function, the sticky stains remaining after the pure water rinse can be decomposed and cleaned in the second step, thereby enhancing the cleaning effect.

[0036] 3. By setting up ultrasonic cleaning, areas that cannot be covered during steam cleaning can be cleaned, thereby effectively improving the comprehensiveness of the cleaning process and avoiding residue.

[0037] 4. After the ultrasonic cleaning is completed, the stains on the surface of the graphite can be effectively cleaned. However, due to the different shapes of different graphite products, some dead corners are prone to appear. Although the ultrasonic wave can clean and remove the stains, it cannot remove the stains. At this time, the use of solvent immersion can achieve the cleaning effect by decomposition.

[0038] 5. By setting up chemical reagents for cleaning, stubborn residual stains in local areas of graphite products can be destructively cleaned, but this type of cleaning method requires the use of special protective equipment to avoid danger. DETAILED DESCRIPTION

[0039] The present application embodiment discloses a method for cleaning graphite after impregnation, comprising the following steps:

[0040] Step 1: High-pressure water washing;

[0041] Step 2: Steam cleaning;

[0042] Step 3: Ultrasonic cleaning;

[0043] Step 4: Solvent cleaning;

[0044] Step 5: Chemical cleaning.

[0045] In this application, high-pressure water washing includes pure water washing and washing with additives:

[0046] S1: Pure water flushing: Use a high-pressure water gun or high-pressure water cleaning equipment to flush the impregnated graphite products at a certain pressure and flow rate. When flushing, pay attention to adjusting the water pressure and the angle of the nozzle to ensure that all parts of the graphite surface can be flushed and the impregnating agent and impurities on the surface are washed away;

[0047] S2: Add additives for flushing: Adding a small amount of surfactants or corrosion inhibitors to high-pressure water can improve the cleaning effect and prevent the graphite surface from being corroded or damaged during the cleaning process;

[0048] High-pressure water washing can effectively carry out preliminary cleaning of large particles and impregnants that are easy to wash off the graphite surface.

[0049] In this application, steam cleaning includes saturated steam cleaning and superheated steam cleaning:

[0050] S1: Saturated steam cleaning: Put the impregnated graphite products into the steam cleaning equipment and pass saturated steam for cleaning. The high temperature and impact force of the steam can quickly melt or soften the impregnant and fall off from the graphite surface. The cleaning time is generally 10-20 minutes. After cleaning, let the graphite products cool naturally or blow dry with cold air;

[0051] S2: Superheated steam cleaning: Superheated steam has higher temperature and energy, and has better cleaning effect; but when using superheated steam for cleaning, pay attention to controlling the temperature and pressure of the steam to avoid thermal shock or damage to the graphite products;

[0052] During steam cleaning, sticky stains remaining after pure water rinsing can be decomposed and cleaned in a second step to enhance the cleaning effect.

[0053] In this application, ultrasonic cleaning includes direct ultrasonic cleaning and ultrasonic cleaning combined with solvent:

[0054] S1: Direct ultrasonic cleaning: put the impregnated graphite product into an ultrasonic cleaning machine, add an appropriate amount of cleaning solvent, turn on the ultrasonic cleaning equipment, and the cleaning time is usually 15-30 minutes. The high-frequency vibration of the ultrasonic wave can quickly separate the impregnant and impurities from the graphite surface;

[0055] S2: Combined with solvent ultrasonic cleaning: first soak the graphite product with solvent for a period of time to dissolve or soften the impregnant, and then perform ultrasonic cleaning, which can improve the cleaning efficiency and effect;

[0056] Ultrasonic cleaning can clean areas that cannot be covered during steam cleaning, thereby effectively improving the comprehensiveness of the cleaning process and avoiding residue.

[0057] In this application, solvent cleaning includes organic solvent cleaning and water-based cleaning agent cleaning:

[0058] S1: Organic solvent cleaning: According to the type of impregnating agent, select a suitable organic solvent, such as alcohol, acetone, toluene, etc., and immerse the impregnated graphite products in the organic solvent. The immersion time depends on the actual situation, generally ranging from a few hours to a day. During this period, it can be properly stirred or shaken, and then taken out and rinsed with clean water;

[0059] S2: Cleaning with water-based cleaning agent: For some water-soluble impregnating agents, water-based cleaning agents can be used for cleaning. Put the graphite products into a cleaning tank containing an appropriate amount of water-based cleaning agent, heat it to a certain temperature, generally between 40℃-60℃, soak for a period of time, and then rinse it with clean water;

[0060] After ultrasonic cleaning, the stains on the graphite surface can be effectively cleaned. However, due to the different shapes of different graphite products, some dead corners are prone to appear. Although ultrasonic waves can remove the stains, they cannot remove them. At this time, solvent immersion can achieve the cleaning effect by decomposition.

[0061] In this application, chemical reagent cleaning includes acid and alkali solution cleaning and redox reagent cleaning:

[0062] S1: Acid and alkali solution cleaning: According to the properties of the impregnating agent, select the appropriate acid and alkali solution for cleaning. For example, for some metal salt impregnating agents, dilute hydrochloric acid or dilute sulfuric acid solution can be used for cleaning; for some alkaline impregnating agents, dilute sodium hydroxide solution can be used for cleaning;

[0063] S2: Redox reagent cleaning: For some impregnants that are difficult to clean with acid and alkali solutions, redox reagents can be used for cleaning. For example, for some organic polymer impregnants, oxidants such as hydrogen peroxide and sodium hypochlorite can be used for cleaning;

[0064] Chemical cleaning can be used to destructively clean stubborn residual stains in local areas of graphite products, but this type of cleaning requires the use of special protective equipment to avoid danger.

[0065] In the present application, the drying process is to place the cleaned graphite product in a cool and ventilated place and dry it naturally. During the drying process, the graphite product needs to be turned over regularly to improve the uniformity of drying and avoid stacking.

[0066] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0067] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A method for cleaning graphite after impregnation, characterized in that: The following steps are involved: Step 1: High-pressure water washing; Step 2: Steam cleaning; Step 3: Ultrasonic cleaning; Step 4: Solvent cleaning; Step 5: Chemical reagent cleaning; Step six: Drying.

2. The cleaning method after graphite impregnation according to claim 1, characterized in that: The high-pressure water washing includes pure water washing and auxiliary agent washing: S1: Pure water flushing: Use a high-pressure water gun or high-pressure water cleaning equipment to flush the impregnated graphite products at a certain pressure and flow rate. Pay attention to adjusting the water pressure and the angle of the nozzle when flushing; S2: Add additives for flushing: Add a small amount of additives such as surfactants or corrosion inhibitors to high-pressure water.

3. The cleaning method after graphite impregnation according to claim 1, characterized in that: The steam cleaning includes saturated steam cleaning and superheated steam cleaning: S1: Saturated steam cleaning: Put the impregnated graphite products into the steam cleaning equipment and pass saturated steam for cleaning. The high temperature and impact force of the steam can quickly melt or soften the impregnant and fall off from the graphite surface. The cleaning time is generally 10-20 minutes. After cleaning, let the graphite products cool naturally or blow dry with cold air; S2: Superheated steam cleaning: Superheated steam has higher temperature and energy, and has better cleaning effect; but when using superheated steam for cleaning, pay attention to controlling the temperature and pressure of the steam to avoid thermal shock or damage to the graphite products.

4. The cleaning method after graphite impregnation according to claim 1, characterized in that: The ultrasonic cleaning includes direct ultrasonic cleaning and ultrasonic cleaning combined with solvent: S1: Direct ultrasonic cleaning: Place the impregnated graphite product into an ultrasonic cleaning machine, add an appropriate amount of cleaning solvent, and turn on the ultrasonic cleaning equipment. The cleaning time is usually 15-30 minutes; S2: Combined with solvent ultrasonic cleaning: first soak the graphite products in solvent for a period of time to make the impregnating agent initially dissolved or softened, and then perform ultrasonic cleaning, which can improve the cleaning efficiency and effect.

5. The cleaning method after graphite impregnation according to claim 1, characterized in that: The solvent cleaning includes organic solvent cleaning and water-based cleaning agent cleaning: S1: Organic solvent cleaning: Soak the impregnated graphite products in organic solvents. The soaking time depends on the actual situation, usually a few hours to a day. During this period, it can be properly stirred or shaken, and then taken out and rinsed with clean water; S2: Cleaning with water-based cleaning agent: For some water-soluble impregnating agents, water-based cleaning agents can be used for cleaning. Put the graphite products into a cleaning tank containing an appropriate amount of water-based cleaning agent, heat it to a certain temperature, generally between 40℃-60℃, soak it for a period of time, and then rinse it with clean water.

6. The cleaning method after graphite impregnation according to claim 1, characterized in that: The chemical reagent cleaning includes acid and alkali solution cleaning and redox reagent cleaning: S1: Acid and alkali solution cleaning: According to the properties of the impregnating agent, select the appropriate acid and alkali solution for cleaning. For example, for some metal salt impregnating agents, dilute hydrochloric acid or dilute sulfuric acid solution can be used for cleaning; for some alkaline impregnating agents, dilute sodium hydroxide solution can be used for cleaning; S2: Redox reagent cleaning: For some impregnants that are difficult to clean with acid and alkali solutions, redox reagents can be used for cleaning. For example, for some organic polymer impregnants, oxidants such as hydrogen peroxide and sodium hypochlorite can be used for cleaning.

7. The cleaning method after graphite impregnation according to claim 1, characterized in that: The drying process is to place the cleaned graphite product in a cool and ventilated place and dry it naturally.