WO2016147995A1 - 洗浄装置 - Google Patents
洗浄装置 Download PDFInfo
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- WO2016147995A1 WO2016147995A1 PCT/JP2016/057505 JP2016057505W WO2016147995A1 WO 2016147995 A1 WO2016147995 A1 WO 2016147995A1 JP 2016057505 W JP2016057505 W JP 2016057505W WO 2016147995 A1 WO2016147995 A1 WO 2016147995A1
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- cleaning
- tank
- cleaning liquid
- liquid
- cleaned
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
- B08B3/123—Cleaning travelling work, e.g. webs, articles on a conveyor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/048—Overflow-type cleaning, e.g. tanks in which the liquid flows over the tank in which the articles are placed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/007—Heating the liquid
Definitions
- the present invention relates to a cleaning device, and more particularly, to a cleaning device used for degreasing cleaning that removes oil such as processing oil and lubricant adhering to the surface of a part when processing an industrial part.
- solvents such as chlorofluorocarbon solvents, organic solvents, and oil-making solvents have been mainly used for degreasing by dissolving oil in these solvents.
- the cleaning apparatus disclosed in Patent Document 1 removes the paste adhering to the die, and an organic solvent such as ketones or alcohols is used as a cleaning liquid in two cleaning tanks for rough cleaning and finishing cleaning. Used.
- Patent Document 1 air bubbles having a diameter of about 1 mm to 10 mm are injected into the first cleaning tank for the purpose of stirring and shaking the cleaning liquid, and both the first cleaning tank and the second cleaning tank are cleaned.
- Ultrasonic waves are applied to the cleaning liquid by ultrasonic radiation means installed at the bottom of the tank.
- solvents such as chlorofluorocarbon solvents, organic solvents, and oil processing solvents must contain substances that cause environmental destruction such as ozone layer destruction and water pollution in rivers, oceans, and groundwater.
- environmental load is large, such as the need to treat the waste as industrial waste. For this reason, development of the washing
- Patent Document 2 proposes a nonionic surfactant having a specific structure as a surfactant having a high effect of stabilizing desired fine bubbles for a long time.
- microbubble cleaning which uses cleaning water mainly composed of water and allows microbubbles to act on the object to be cleaned
- contaminants such as oil adsorbed on the fine bubbles accumulate on the liquid surface.
- contaminants reattached when pulled up.
- a mechanism that does not re-adhere contaminants accumulated on the liquid surface to the object to be cleaned is necessary. Development was desired.
- the present invention has been made to solve the above-described problems, and is a cleaning apparatus that has a low environmental burden, is excellent in maintainability, and can stably ensure high cleaning power for a long period of time.
- the purpose is to obtain.
- a cleaning apparatus is configured to circulate a first cleaning liquid, a first cleaning tank that holds a first cleaning liquid, a first microbubble generator that generates microbubbles in the first cleaning liquid, and a first cleaning liquid.
- a first circulation pump that supplies the first cleaning liquid containing fine bubbles to the first cleaning tank, a second cleaning tank that holds the second cleaning liquid, and an ultrasonic irradiation device that irradiates ultrasonic waves inside the second cleaning tank; After holding the object to be cleaned and transporting it to the first cleaning tank, it is equipped with a transport device that subsequently transports it to the second cleaning tank, using water added with an additive that prevents coalescence of bubbles as the first cleaning liquid
- water, an aqueous cleaning agent, an alkaline cleaning liquid, or a hydrophilic organic solvent is used as the second cleaning liquid, and the first cleaning tank injects the first cleaning liquid above the liquid level of the first cleaning liquid therein. It has a nozzle and the transport device transports the object to be cleaned into
- a cleaning apparatus comprising: a first cleaning tank that holds the first cleaning liquid; a first microbubble generator that generates microbubbles in the first cleaning liquid; and the first cleaning liquid.
- a first circulation pump that circulates and supplies a first cleaning liquid containing fine bubbles to the first cleaning tank, a second cleaning tank that holds the second cleaning liquid, and an ultrasonic irradiation that irradiates ultrasonic waves inside the second cleaning tank Water having an apparatus and a transport device for holding the object to be cleaned and transporting it to the first cleaning tank, and subsequently transporting it to the second cleaning tank, to which an additive for preventing bubble coalescence is added as the first cleaning liquid
- the first cleaning tank uses one of water, an aqueous cleaning agent, an alkaline cleaning liquid, and a hydrophilic organic solvent as the second cleaning liquid, and the liquid level of the first cleaning liquid held therein is cleaned.
- the partition plate is divided into two regions, and the partition plate is installed with an interval through which the object to be cleaned can pass between the partition plate and the bottom of the first cleaning tank.
- the first cleaning liquid containing bubbles is supplied to the first cleaning tank, and the transfer device inputs the object to be cleaned from the object to be cleaned input area of the first cleaning tank and passes the area below the partition plate to extract the object to be cleaned. It is taken out from.
- the cleaning apparatus in the first cleaning tank having the largest amount of oil content from the object to be cleaned, water to which an additive is added as the first cleaning liquid is used.
- the hydrophobic oil removed from the object to be cleaned can be accumulated on the liquid surface without being dissolved in the first cleaning liquid.
- the maintenance frequency of the first cleaning tank can be greatly reduced.
- the first cleaning liquid itself is hardly deteriorated, it is possible to ensure a stable cleaning quality for a long period of time without decreasing the cleaning power as the number of cleanings increases.
- it becomes possible to treat only the recovered oil as industrial waste and even if the first cleaning liquid is processed as industrial waste, the amount of waste liquid is small due to the low frequency of replacement of the first cleaning liquid, which is an environmental burden. Is small.
- the first cleaning liquid is sprayed from the nozzle in the first cleaning tank, and the object to be cleaned is not immersed in the liquid of the first cleaning liquid. It is possible to prevent the hydrophobic oil accumulated on the surface of the cleaning liquid from reattaching to the object to be cleaned.
- the cleaning apparatus of the fourth aspect of the present invention since the fine bubbles act on the object to be cleaned in the liquid in the object input region of the first cleaning tank, the hydrophobicity separated by the fine bubbles is Since the characteristic oil is mainly accumulated on the liquid level in the area to be cleaned, and the liquid level in the area to be cleaned can be kept in a purified state, the hydrophobic oil is removed when the object to be cleaned is taken out from the first cleaning liquid. Reattachment can be prevented.
- FIG. 1 shows the overall configuration of the cleaning apparatus according to the first embodiment.
- the cleaning apparatus according to the first embodiment is used for degreasing and cleaning to remove oil such as processing oil and lubricant attached to the surface of industrial parts.
- the first cleaning tank 10, the second cleaning tank 20, The first microbubble generator 11, the first circulation pump 12, the ultrasonic irradiation device 21, the transport device 4, and the temperature raising means (not shown) for the cleaning liquid are provided.
- the first cleaning tank 10 holds a first cleaning liquid 1 mainly for removing hydrophobic oil
- the second cleaning tank 20 mainly contains a second cleaning liquid for removing hydrophilic (water-soluble) oil.
- the cleaning liquid 2 is retained.
- the first cleaning liquid 1 water to which an additive for preventing the coalescence of bubbles is added is used.
- the second cleaning liquid 2 any one of water, an aqueous cleaning agent, an alkaline cleaning liquid, and a hydrophilic (polar) organic solvent can be used. In the first embodiment, water is used.
- the first microbubble generator 11 generates microbubbles having a diameter of 10 ⁇ m to several tens of ⁇ m in the liquid of the first cleaning liquid 1.
- cleaned material 3 is removed by the effect
- the first circulation pump 12 circulates the first cleaning liquid 1 and supplies the first cleaning liquid 1 containing fine bubbles to the first cleaning tank 10.
- the first cleaning tank 10 has a plurality of nozzles 13 for injecting the first cleaning liquid 1 therein.
- the first circulation pump 12 supplies the first cleaning liquid 1 containing fine bubbles heated by the temperature raising means to the nozzle 13.
- the nozzle 13 is above the liquid surface 1a of the first cleaning liquid 1, and the first cleaning liquid 1 ejected from the nozzle 13 hits the inner wall 10a of the first cleaning tank 10 without being scattered around and is collected. Thus, the installation position and the injection area are determined.
- the pipe connected near the bottom of the first cleaning tank 10 is connected to the first circulation pump 12 and further connected to the nozzle 13 via the first microbubble generator 11. That is, the first microbubble generator 11 is provided between the first circulation pump 12 and the nozzle 13 and is configured to generate microbubbles in the first cleaning liquid 1 in the middle of the piping path.
- the ultrasonic irradiation device 21 installed at the bottom of the second cleaning tank 20 irradiates the inside of the second cleaning tank 20 with ultrasonic waves, and irradiates the object 3 to be cleaned with the second cleaning liquid 2.
- the frequency of the ultrasonic wave irradiated by the ultrasonic irradiation device 21 is in the range of 10 Hz to 1 MHz capable of causing the cavitation phenomenon, and when the cleaning device according to the first embodiment is applied to the industrial field. From the viewpoint of the cleaning treatment speed, a range of 100 Hz to 1 MHz is preferable, and a range of 1 kHz to 1 MHz is more preferable.
- the transport device 4 holds the article to be cleaned 3 and transports it to the first cleaning tank 10 and then transports it to the second cleaning tank 20.
- an arrow X indicates the transport direction of the transport device 4.
- the transport device 4 transports the object to be cleaned 3 into the first cleaning tank 10 and allows the nozzle 13 to pass through the ejection region 1b where the first cleaning liquid 1 is ejected. Subsequently, it is moved to the second cleaning tank 20, immersed in the second cleaning liquid 2 irradiated with ultrasonic waves, and then taken out from the second cleaning liquid 2.
- the additive is a substance having a function of preventing the fine bubbles generated by the first fine bubble generating device 11 from being united and causing the fine bubbles to stably exist in water for a long time.
- a substance such as a (poly) oxyalkylene adduct of an active hydrogen atom-containing compound represented by the following formula 1 disclosed in Patent Document 2 described above can be used.
- Z-[(AO) n -H] p (Formula 1)
- Z is a residue obtained by removing active hydrogen from a p-valent active hydrogen-containing compound
- A is an alkylene group having 1 to 8 carbon atoms
- n is an integer of 1 to 400
- p is an integer of 1 to 100.
- the concentration of the additive is preferably in the range of 10 ppm to 10000 ppm. Furthermore, when the cleaning apparatus according to Embodiment 1 is applied to the industrial field, the concentration of the additive is more preferably in the range of 100 ppm to 1000 ppm from the viewpoint of operating cost and cleaning quality. If the concentration of the additive is too high, the loss of the additive due to evaporation of the cleaning liquid, take-out by the article 3 to be cleaned, etc. increases, and the cost for the cleaning liquid increases.
- the cleaning processing speed depends on the surface area of the bubbles. Therefore, as the bubble size increases, the surface area of the bubbles decreases and the cleaning processing speed decreases.
- a cleaning speed synchronized with the cycle time of the processes before and after the cleaning process is required, and thus a decrease in the cleaning processing speed is not preferable. From these points of view, it is preferable to set the concentration of the additive within the above range from the viewpoint of cleaning cost and cleaning processing speed.
- the second cleaning liquid 2 held in the second cleaning tank 20 it is necessary to select the second cleaning liquid 2 held in the second cleaning tank 20 so that the first cleaning liquid 1 brought into the object to be cleaned 3 does not cause a problem.
- water is used. is doing. Since the oil to be degreased in the second cleaning tank 20 is mainly hydrophilic (water-soluble) oil, a sufficient degreasing effect can be obtained by using water for the second cleaning liquid 2.
- the addition amount of a rust preventive agent is determined according to the kind of rust preventive agent. For example, when using Magnus (registered trademark) manufactured by Parker Corporation, rust prevention can be imparted by adding about 0.1 w%.
- the flow of the cleaning process using the cleaning device according to the first embodiment will be described in detail with reference to FIG.
- the object to be cleaned 3 is held by the transfer device 4 so as not to drop off, and is put into the first cleaning tank 10.
- the nozzle 13 is installed inside the first cleaning tank 10 so as not to interfere with the conveyance direction of the article 3 to be cleaned.
- the object to be cleaned 3 is exposed to the first cleaning liquid 1 including fine bubbles ejected from the nozzles 13 while being transported and moved in the horizontal direction above the liquid surface 1 a of the first cleaning liquid 1.
- the 1st cleaning liquid 1 is heated up by the temperature rising means.
- hydrophobic oil Since hydrophobic oil has low polarity, it exists in a highly polar water in an unstable state without being solvated from the solvent water. For this reason, when hydrophobic bubbles are allowed to act in water, the hydrophobic oil is adsorbed on the more stable bubble surface. Bubbles having hydrophobic oil adsorbed on the surface are collected in the first cleaning tank 10 together with the first cleaning liquid 1. The bubbles recovered in the first cleaning tank 10 float in the first cleaning liquid 1 by their buoyancy and break up when they reach the liquid level 1a. As a result, hydrophobic oil accumulates on the liquid level 1a of the first cleaning tank 10. When the hydrophobic oil and the water-soluble oil are adhered to the object 3 to be cleaned, the removal of the hydrophobic oil becomes dominant in the first cleaning tank 10.
- the object 3 to be cleaned which has been degreased and cleaned by the fine bubbles in the first cleaning tank 10, is moved to the upper part of the second cleaning tank 20 by the transport device 4, and in the second cleaning liquid 2 held in the second cleaning tank 20. Lowered to a fully immersed position.
- An ultrasonic wave is applied to the second cleaning liquid 2 held in the second cleaning tank 20 by an ultrasonic irradiation device 21.
- the object to be cleaned 3 is taken out from the second cleaning liquid 2 after being transported and moved in the horizontal direction in the second cleaning tank 20 while being completely immersed in the second cleaning liquid 2.
- the effect of the cleaning apparatus according to the first embodiment will be described in comparison with a conventional degreasing cleaning apparatus.
- the conventional apparatus that dissolves the oil adhering to the object to be cleaned in a solvent such as an organic solvent, the removed oil accumulates in the cleaning liquid.
- a solvent such as an organic solvent
- multiple cleaning tanks are usually used, but the cleaning liquid in the first cleaning tank, which has the largest amount of oil from the object to be cleaned, is greatly deteriorated.
- the maintenance frequency is determined by the first cleaning tank.
- the conventional apparatus uses an organic solvent or the like as the cleaning liquid, it is necessary to treat the used cleaning liquid as industrial waste when replacing the cleaning liquid.
- a cleaning solution such as an aqueous cleaning agent that has a low environmental burden
- a large amount of oil is dissolved in the used cleaning solution, so that it also has to be discarded as industrial waste.
- the cleaning apparatus uses the water to which the additive is added as the first cleaning liquid 1 in the first cleaning tank 10 in which the amount of oil brought in from the object to be cleaned 3 is the largest.
- the hydrophobic oil removed from the object to be cleaned 3 can be accumulated in the liquid surface 1a without being dissolved in the first cleaning liquid 1, and separated and recovered from the first cleaning liquid 1. Is possible.
- the maintenance frequency of the first cleaning tank 10 can be greatly reduced, and maintenance-free for a long period of time can be realized as a cleaning process.
- the first cleaning tank 10 employs a spray method in which the first cleaning liquid 1 is sprayed from the nozzle 13, and the object 3 to be cleaned is not immersed in the first cleaning liquid 1.
- the hydrophobic oil floating on the surface 1a does not reattach to the object to be cleaned 3.
- the first cleaning liquid 1 itself held in the first cleaning tank 10 is hardly deteriorated, stable cleaning quality can be ensured without decreasing the cleaning power as the number of times of cleaning increases.
- the oil accumulated on the liquid surface 1a of the first cleaning liquid 1 can be separated and recovered, only the recovered oil may be treated as industrial waste during maintenance.
- the operation frequency of processing the first cleaning liquid 1 as industrial waste is very low compared to the conventional apparatus.
- the occurrence frequency of the used first cleaning liquid 1 is low. From the above, according to the first embodiment, it is possible to obtain a cleaning apparatus that has a low environmental load, is excellent in maintainability, and can stably ensure a high cleaning power for a long period of time.
- FIG. FIG. 2 shows a configuration around the first cleaning tank in the cleaning apparatus according to Embodiment 2 of the present invention. 2, the same reference numerals are given to the same or corresponding parts as in FIG. 1, and the description is omitted. Moreover, since the structure of the 2nd washing tank 20 in the washing
- the spray method in which the first cleaning liquid 1 is sprayed from the nozzle 13 in the first cleaning tank 10 is adopted.
- the object to be cleaned 3 is placed in the first cleaning tank 10A.
- a cleaning configuration is employed in which fine bubbles are jetted in a state of being immersed in the first cleaning liquid 1.
- the detergency in degreasing depends on the temperature of the oil to be degreased, and the higher the temperature, the higher the detergency. For this reason, also in the cleaning apparatus according to the first embodiment, the first cleaning liquid 1 whose temperature has been raised is supplied to the nozzle 13.
- the temperature of the oil adhering to the surface of the object to be cleaned 3 during the cleaning process rises to the set temperature of the first cleaning liquid 1. It may not be warm and a sufficient cleaning effect may not be obtained.
- the temperature of the first cleaning liquid 1 since the area where the first cleaning liquid 1 comes into contact with air is large and easily radiates heat, the temperature of the first cleaning liquid 1 must be set higher than in the immersion method.
- the object to be cleaned 3 is immersed in the first cleaning liquid 1 in the first cleaning tank 10A, and the time for the object 3 to be cleaned to be in contact with the first cleaning liquid 1 is ensured for a long time.
- the temperature increasing effect of the object 3 can be enhanced, and heat radiation from the first cleaning liquid 1 can be suppressed as compared with the spray type. Therefore, the set temperature of the first cleaning liquid 1 can be set lower than that in the first embodiment.
- the first cleaning tank 10 ⁇ / b> A has a liquid surface of the first cleaning liquid 1 held in the first cleaning tank 10 ⁇ / b> A and a cleaning object input region 1 c into which the cleaning object 3 is input.
- a partition plate 14 is provided to divide into two areas, an object extraction area 1d from which the object 3 is extracted.
- the partition plate 14 is provided with an interval through which the article to be cleaned 3 can pass between the partition plate 14 and the bottom 10b of the first cleaning tank 10A.
- the first cleaning liquid 1 containing fine bubbles is supplied from the discharge port 18 in the vicinity of the bottom 10b of the cleaning object charging area 1c of the first cleaning tank 10A.
- the transfer device 4 holds the article to be cleaned 3 and transfers it to the first cleaning tank 10 ⁇ / b> A, and then transfers it to the second cleaning tank 20.
- an arrow X indicates the transport direction of the transport device 4.
- the transfer device 4 inputs the object to be cleaned 3 from the object input area 1c of the first cleaning tank 10A, and passes it below the partition plate 14 to extract it from the object to be cleaned extraction area 1d. .
- the cleaning device according to the second embodiment is recovered by the first recovery groove 10c and the first recovery groove 10c for recovering the first cleaning liquid 1 overflowed from at least a part of the wall surface of the first cleaning tank 10A.
- a first recovery tank 15 that holds the first cleaning liquid 1 is provided.
- the arrow Y indicates the direction of overflow.
- FIG. 3 is a top view showing the first cleaning tank 10 ⁇ / b> A shown in FIG. 2, and the first cleaning liquid 1 is overflowed from two wall surfaces facing each other through the partition plate 14.
- FIG. 4 is a top view showing another example of the first cleaning tank 10A in the cleaning apparatus according to the second embodiment. As shown in FIG. 4, you may make it overflow the 1st washing
- the first recovery groove 10c preferably has a structure provided in each of the article input region 1c and the object extraction region 1d. From the viewpoint of reducing the installation space of the first cleaning tank 10A, overflow from the two opposing wall surfaces is advantageous, and from the viewpoint of the recovery efficiency of the hydrophobic oil that has floated on the liquid surface, full overflow is advantageous. .
- the first cleaning liquid 1 overflowed from the first cleaning tank 10A is recovered in the first recovery tank 15 via the first recovery groove 10c, but is not necessarily limited to the first recovery groove 10c. It is not necessary to go through.
- the pipe connected to the bottom 10b of the first cleaning tank 10A and the pipe connected to the vicinity of the bottom of the first recovery tank 15 are connected via the manifold 17a.
- the discharge side of the first circulation pump 12 is connected via a manifold 17b to a discharge port 18 installed near the bottom 10b of the cleaning object input area 1c of the first cleaning tank 10A.
- a first fine bubble generator 11 is connected between the first circulation pump 12 and the discharge port 18, and the first cleaning liquid 1 containing fine bubbles is supplied to the discharge port 18.
- the supply amount of the first cleaning liquid 1 from the first cleaning tank 10A to the first fine bubble generating device 11 is adjusted by a flow rate regulator 16a which is a first supply amount adjusting unit.
- the supply amount of the first cleaning liquid 1 from the first recovery tank 15 to the first fine bubble generating device 11 is adjusted by a flow rate regulator 16b which is a second supply amount adjustment unit.
- the first circulation pump 12 passes the first cleaning liquid 1 held in the first cleaning tank 10 ⁇ / b> A and the first cleaning liquid 1 held in the first recovery tank 15 through the first microbubble generator 11. Can be supplied to the first cleaning tank 10A.
- the overflow amount from 10 A of 1st washing tanks can be adjusted with the flow regulators 16a and 16b, and when foaming at the time of overflow is excessive, foaming can be suppressed by reducing overflow amount.
- the flow of the cleaning process in the first cleaning tank 10A of the cleaning device according to the second embodiment will be described.
- the object to be cleaned 3 is input from the object input region 1c of the first cleaning tank 10A by the transfer device 4 and is immersed in the first cleaning liquid 1.
- the object to be cleaned 3 is exposed to the first cleaning liquid 1 containing fine bubbles while being transported and moved in the horizontal direction in the region of the first cleaning liquid 1 where the plurality of discharge ports 18 are arranged.
- the oil adhering to is removed. After that, it is transported and moved in the horizontal direction, passes through the lower part of the partition plate 14, enters the object to be cleaned extraction region 1 d, and is extracted from the first cleaning liquid 1 at a predetermined position.
- the behavior of the oil component separated from the object to be cleaned 3 by the fine bubbles in the first cleaning tank 10A will be described.
- the fine bubbles having the hydrophobic oil adsorbed on the surface leave the object to be cleaned 3 due to their own buoyancy and float in the first cleaning liquid 1.
- the fine bubbles that have moved vertically upward in the first cleaning liquid 1 are broken when they reach the liquid level, and only the hydrophobic oil remains on the liquid level.
- the liquid level is divided into two by the partition plate 14, and the hydrophobic oil separated by the fine bubbles floats mainly in the washing object input region 1c.
- the hydrophobic oil that has floated to the liquid surface is provided in the cleaning object input area 1c and the cleaning object extraction area 1d, respectively. It is recovered in the first recovery tank 15 via the first recovery groove 10c.
- the liquid level of the first cleaning liquid 1, in particular, the object extraction region 1 d to be cleaned can always be kept in a purified state, and the hydrophobic oil is regenerated when the object 3 to be cleaned is extracted from the first cleaning liquid 1. Adhesion can be prevented.
- the object to be cleaned 3 is immersed in the first cleaning liquid 1 in the first cleaning tank 10A.
- the temperature raising effect of the object 3 is increased, and a higher cleaning effect is obtained.
- the set temperature of the first cleaning liquid 1 can be lowered, the cost can be reduced.
- FIG. 5 shows a configuration around the second cleaning tank in the cleaning apparatus according to Embodiment 3 of the present invention.
- the same reference numerals are given to the same or corresponding parts as in FIG.
- the structure of the 1st washing tank in this Embodiment 3 is the 1st washing tank 10 (refer FIG. 1) in the said Embodiment 1, or 10A (refer FIG. 2) in the said 2nd Embodiment. Either of these may be adopted.
- the first cleaning liquid 1 and the second cleaning liquid 2 similar to those in the first embodiment are used.
- the second cleaning tank 20A in the cleaning device according to the third embodiment includes a mechanism for purifying the second cleaning liquid 2 by precipitating water-soluble oil dissolved in the second cleaning liquid 2.
- the second cleaning tank 20A includes a second recovery groove 20c for recovering the second cleaning liquid 2 overflowed from at least a part of the wall surface, and a second cleaning liquid 2 recovered by the second recovery groove 20c.
- a circulation pump 24 is provided.
- the arrow Z indicates the direction of overflow.
- the second circulation pump 24 supplies the second cleaning liquid 2 held in the second recovery tank 22 to the second cleaning tank 20A, and supplies the second cleaning liquid 2 held in the second recovery tank 22 to the second fine bubbles. It returns to the 2nd collection tank 22 via the generator 23.
- the second recovery tank 22 and the second circulation pump 24 are connected via a flow rate regulator 25a and a manifold 26a, and the supply amount of the second cleaning liquid 2 to the second circulation pump 24 is adjusted by the flow rate regulator 25a.
- the discharge side of the second circulation pump 24 is branched by a manifold 26b, one through the flow rate regulator 25b and the second fine bubble generator 23 to the second recovery tank 22 and the other through the flow rate regulator 25c. It is supplied to the second cleaning tank 20A.
- the main oil to be degreased in the second cleaning tank 20A is a water-soluble oil that is difficult to remove in the first cleaning tank 10 (or 10A).
- the water-soluble oil adhering to the object to be cleaned 3 is dissolved in the water that is the second cleaning liquid 2 for cleaning, so that the water-soluble oil accumulates in the second cleaning liquid 2 as the number of cleanings increases.
- the water-soluble oil accumulated in the second cleaning liquid 2 is precipitated by fine bubbles to purify the second cleaning liquid 2.
- the second cleaning liquid 2 is purified by the fine bubbles.
- Many water-soluble oils contain a surfactant component, and the inherently hydrophobic oil is dispersed in a stable state in the second washing liquid 2 by being covered with the surfactant. Yes.
- the surfactant component changes into an insoluble metal soap and precipitates, so that the oil component is stably present in the liquid due to the lack of the surfactant component.
- the oil component precipitates in the liquid and floats on the liquid surface of the second cleaning liquid 2.
- the second cleaning liquid 2 in which the water-soluble oil is dissolved is purified using this phenomenon.
- the surfactant component of the water-soluble oil is converted into a metal soap, and the oil component is precipitated.
- cleaning liquid 2 is purified by collect
- FIG. 6 shows a change in the concentration of the water-soluble oil when fine bubbles are allowed to act on the water-soluble oil dissolved in water.
- the vertical axis represents the concentration (ppm) of the water-soluble oil
- the horizontal axis represents the injection time (minutes) of the fine bubbles.
- region which supplies fine bubbles to water-soluble oil must be an area
- the second recovery tank 22 in order to prevent the influence of the fine bubbles on the ultrasonic cleaning, in the second recovery tank 22 that holds the second cleaning liquid 2 overflowed from the second cleaning tank 20A, the second cleaning liquid 2 due to the fine bubbles.
- the discharge port 27 for injecting the second cleaning liquid 2 containing fine bubbles is necessarily installed at the bottom of the second recovery tank 22. However, it may be installed at an intermediate position from the liquid level to the bottom.
- FIG. 7 is a top view showing the second cleaning tank 20A shown in FIG. 5, in which the second cleaning liquid 2 is overflowed from two opposing wall surfaces.
- FIG. 8 is a top view showing another example of the second cleaning tank 20A in the cleaning apparatus according to the third embodiment. As shown in FIG. 8, you may make it overflow the 2nd washing
- A indicates a position where the object to be cleaned 3 is put into the second cleaning liquid 2
- B indicates a position where the object to be cleaned 3 is taken out from the second cleaning liquid 2.
- the liquid level 2a of the 2nd cleaning liquid 2 in the 2nd washing tank 20A is to be cleaned. It is preferable to flow in the direction from the object take-out position B to the object to be cleaned input position A. Therefore, as shown in FIG. 8, it overflows from the wall surface near the washing object input position A.
- the second cleaning liquid 2 overflowed from the second cleaning tank 20A is recovered in the second recovery tank 22 via the second recovery groove 20c. It is not necessary to go through.
- the overflow is employ
- the third embodiment in addition to the same effects as those of the first and second embodiments, by providing a purification mechanism in the second cleaning tank 20A, the maintainability is further improved and high cleaning power is achieved. It can be ensured stably for a long time. It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.
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Abstract
Description
この発明の上記以外の目的、特徴、観点及び効果は、図面を参照する以下のこの発明の詳細な説明から、さらに明らかになるであろう。
以下に、本発明の実施の形態1に係る洗浄装置について、図面に基づいて説明する。図1は、本実施の形態1に係る洗浄装置の全体構成を示している。本実施の形態1に係る洗浄装置は、工業部品の表面に付着した加工油や潤滑剤等の油分を除去する脱脂洗浄に用いられるものであり、第一洗浄槽10、第二洗浄槽20、第一微細気泡発生装置11、第一循環ポンプ12、超音波照射装置21、搬送装置4、及び洗浄液の昇温手段(図示省略)を備えている。
式1中、Zはp価の活性水素含有化合物から活性水素を除いた残基、Aは炭素数1~8のアルキレン基、nは1~400の整数、pは1~100の整数。
図2は、本発明の実施の形態2に係る洗浄装置における第一洗浄槽周辺の構成を示している。図2において、図1と同一、相当部分には同一符号を付し、説明を省略する。また、本実施の形態2に係る洗浄装置における第二洗浄槽20の構成は、上記実施の形態1と同じであるので、図示及び説明を省略する。本実施の形態2においても、上記実施の形態1と同様の第一洗浄液1及び第二洗浄液2が用いられる。
図5は、本発明の実施の形態3に係る洗浄装置における第二洗浄槽周辺の構成を示している。図5において、図1と同一、相当部分には同一符号を付し、説明を省略する。また、本実施の形態3における第一洗浄槽の構成は、上記実施の形態1における第一洗浄槽10(図1参照)、または上記実施の形態2における第一洗浄槽10A(図2参照)のどちらを採用しても良い。本実施の形態2においても、上記実施の形態1と同様の第一洗浄液1及び第二洗浄液2が用いられる。
Claims (12)
- 第一洗浄液を保持する第一洗浄槽と、前記第一洗浄液の液中に微細気泡を生成する第一微細気泡発生装置と、前記第一洗浄液を循環させ微細気泡を含む前記第一洗浄液を前記第一洗浄槽に供給する第一循環ポンプと、第二洗浄液を保持する第二洗浄槽と、前記第二洗浄槽の内部に超音波を照射する超音波照射装置と、被洗浄物を保持し前記第一洗浄槽に搬送した後、続いて前記第二洗浄槽に搬送する搬送装置を備え、前記第一洗浄液として気泡の合一を防止する添加剤が添加された水を用い、前記第二洗浄液として水、水系の洗浄剤、アルカリ洗浄液、及び親水性有機溶剤のいずれかを用い、
前記第一洗浄槽は、その内部の前記第一洗浄液の液面より上部に前記第一洗浄液を噴射するノズルを有しており、前記搬送装置は、被洗浄物を前記第一洗浄槽の内部に搬送し、前記ノズルから前記第一洗浄液が噴射されている領域を通過させることを特徴とする洗浄装置。 - 前記ノズルは、前記ノズルから噴射された前記第一洗浄液が前記第一洗浄槽の内壁に当たって回収されるように、その設置位置及び噴射領域が決定されることを特徴とする請求項1記載の洗浄装置。
- 前記第一微細気泡発生装置は、前記第一循環ポンプと前記ノズルの間に設けられ、前記第一循環ポンプは、微細気泡を含む前記第一洗浄液を前記ノズルに供給することを特徴とする請求項1または請求項2に記載の洗浄装置。
- 第一洗浄液を保持する第一洗浄槽と、前記第一洗浄液の液中に微細気泡を生成する第一微細気泡発生装置と、前記第一洗浄液を循環させ微細気泡を含む前記第一洗浄液を前記第一洗浄槽に供給する第一循環ポンプと、第二洗浄液を保持する第二洗浄槽と、前記第二洗浄槽の内部に超音波を照射する超音波照射装置と、被洗浄物を保持し前記第一洗浄槽に搬送した後、続いて前記第二洗浄槽に搬送する搬送装置を備え、前記第一洗浄液として気泡の合一を防止する添加剤が添加された水を用い、前記第二洗浄液として水、水系の洗浄剤、アルカリ洗浄液、及び親水性有機溶剤のいずれかを用い、
前記第一洗浄槽は、その内部に保持された前記第一洗浄液の液面を、被洗浄物が投入される被洗浄物投入領域と被洗浄物が取り出される被洗浄物取り出し領域の二つの領域に分ける仕切り板を有し、前記仕切り板は、前記第一洗浄槽の底部との間に被洗浄物が通過することができる間隔をあけて設置され、
前記第一循環ポンプは、微細気泡を含む前記第一洗浄液を前記第一洗浄槽に供給し、前記搬送装置は、被洗浄物を前記第一洗浄槽の前記被洗浄物投入領域から投入し、前記仕切り板の下方を通過させて前記被洗浄物取り出し領域から取り出すことを特徴とする洗浄装置。 - 前記第一循環ポンプは、微細気泡を含む前記第一洗浄液を前記被洗浄物投入領域の底部から前記第一洗浄槽に供給することを特徴とする請求項4記載の洗浄装置。
- 前記第一洗浄槽の少なくとも一部の壁面からオーバーフローさせた前記第一洗浄液を保持する第一回収槽と、前記第一洗浄槽から前記第一微細気泡発生装置への前記第一洗浄液の供給量を調整する第一供給量調整部と、前記第一回収槽から前記第一微細気泡発生装置への前記第一洗浄液の供給量を調整する第二供給量調整部を備えたことを特徴とする請求項4または請求項5に記載の洗浄装置。
- 前記第一洗浄槽の少なくとも一部の壁面からオーバーフローさせた前記第一洗浄液を回収する第一回収溝を備えたことを特徴とする請求項6記載の洗浄装置。
- 前記第一循環ポンプは、前記第一洗浄槽に保持された前記第一洗浄液及び前記第一回収槽に保持された前記第一洗浄液を、前記第一微細気泡発生装置を介して前記第一洗浄槽に供給することを特徴とする請求項6または請求項7に記載の洗浄装置。
- 前記第二洗浄槽の少なくとも一部の壁面からオーバーフローさせた前記第二洗浄液を保持する第二回収槽と、前記第二洗浄液の液中に微細気泡を生成する第二微細気泡発生装置と、前記第二洗浄液を循環させる第二循環ポンプを備えたことを特徴とする請求項1から請求項8のいずれか一項に記載の洗浄装置。
- 前記第二洗浄槽の少なくとも一部の壁面からオーバーフローさせた前記第二洗浄液を回収する第二回収溝を備えたことを特徴とする請求項9記載の洗浄装置。
- 前記第二循環ポンプは、前記第二回収槽に保持された前記第二洗浄液を前記第二洗浄槽に供給すると共に、前記第二回収槽に保持された前記第二洗浄液を、前記第二微細気泡発生装置を介して前記第二回収槽に戻すことを特徴とする請求項9または請求項10に記載の洗浄装置。
- 前記第一洗浄液及び前記第二洗浄液のいずれか一方または両方に、防錆剤を添加したことを特徴とする請求項1から請求項11のいずれか一項に記載の洗浄装置。
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