EP2394750B1 - Method for cleaning containers and cleaning machine - Google Patents

Method for cleaning containers and cleaning machine Download PDF

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Publication number
EP2394750B1
EP2394750B1 EP11180055.3A EP11180055A EP2394750B1 EP 2394750 B1 EP2394750 B1 EP 2394750B1 EP 11180055 A EP11180055 A EP 11180055A EP 2394750 B1 EP2394750 B1 EP 2394750B1
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Prior art keywords
cleaning
containers
intensive
station
ice
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EP11180055.3A
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German (de)
French (fr)
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EP2394750A1 (en
Inventor
Cornelia FOLZ
Jan Momsen
Heinz Humele
Timm Kirchhoff
Klaus Karl Wasmuht
Bernd Hansen
Thomas Islinger
Christoph Weinholzer
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Krones AG
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Krones AG
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Priority to DE102009039762A priority Critical patent/DE102009039762A1/en
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Priority to EP10166144.5A priority patent/EP2292340B1/en
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Publication of EP2394750A1 publication Critical patent/EP2394750A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08Cleaning containers, e.g. tanks
    • B08B9/20Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
    • B08B9/38Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by using scrapers, chains, grains of shot, sand or other abrasive means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08Cleaning containers, e.g. tanks
    • B08B9/46Inspecting cleaned containers for cleanliness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/005Details of cleaning machines or methods involving the use or presence of liquid or steam the liquid being ozonated

Description

  • The invention relates to a method according to the preamble of patent claim 1 and a cleaning machine according to the preamble of patent claim 10.
  • For example, in the beverage industry, it is known to use for cleaning containers, especially bottles of plastic or glass, in cleaning machines with at least one intensive cleaning station in conjunction with water chemicals such as alkalis or acids, to a considerable extent directly on or in the containers and optionally also to work with heat. These known methods require a considerable amount of water and chemicals for each container to be cleaned, as well as considerable expenditure of energy for generating heat. The high water requirement is u.a. due to the fact that the chemicals must not only be brought to the cleaning operation with a certain dilution, but must also be removed without residue. This results in a tremendous cost of cleaning the containers, and may therefore also result in indirect additional costs if, due to chemicals that have not been completely removed without residue, recalls of contaminated by chemical residues in the container bottled drinks are required. In bottling and packaging technology, for example, refillable bottles made of glass or plastic, the cleaning machine used is the largest consumer of thermal energy and chemicals, for example in the form of alkalis. For example, about 30 kJ of thermal energy and about 20 ml of a 2.5% alkaline solution are required per bottle to be cleaned. The particular intensive cleaning step is usually tuned to the highest level of contamination of the containers, i.e., it is assumed that all containers are extremely and equally soiled, so that containers with less or no level of contamination, e.g. new containers need to be cleaned more than required, and this would waste energy, time and cleaning medium.
  • From DE 196 26 137 A known cleaning machine includes an intensive cleaning station and outside of the intensive cleaning station a separate and external cleaning station. In the embodiment of the Fig. 4 Be isolated because of excessive contamination degree objects outside the intensive cleaning station separately and upstream of one of the intensive cleaning station downstream inspector re-introduced. The cleaning machine is operated without pre-cleaning station and with chemicals, in particular in the case of external cleaning, discarded containers with highly reactive cleaning agents and / or temperature action. In the intensive cleaning station for the non-segregated objects, all containers are cleaned with the same intensity and not individually depending on the degree of contamination detected. Even with the special cleaning outside the intensive cleaning station all rejected containers are treated the same way, possibly several times.
  • At the DE 10 2004 039 084 A known cleaning machine is carried out in a pre-cleaning a disinfection with a chemical-containing rinsing medium either the cleaning medium or a rinsing station, or the entire interior of the washing machine. The intensive cleaning takes place in a single bath of the cleaning machine with a suitable cleaning medium, which is for example an alkali. In the bath, all containers are cleaned similarly intense. If necessary, an environment-scanning detector controls the ionization for disinfection. The detector has no influence on the intensive cleaning.
  • In the out DE 197 09 621 A known bottle washing machine only the outer surfaces of the bottles, ie the decorated surfaces are treated with dry ice granules in a pre-cleaning step, before an intensive cleaning is also carried out inside. The intensive cleaning is the same for all bottles and with chemicals.
  • Out GB 722 399 A It is known to clean metal castings with metal shot, sand or nutshell granules and the like. By blasting and deburring.
  • In the out FR 644 426 A known bottles cleaning machine, the bottles are cleaned with metal grains or glass beads or sand or other granular material using water, all bottles are cleaned the same length and the same intensity without first detect their degree of contamination.
  • The invention has for its object to provide a method of the type mentioned above and a cleaning machine for performing the method, which allow reliable cleaning with reduced energy consumption. Part of the task is the creation of a cleaning machine for bottles, which can be operated very inexpensively.
  • The stated object is achieved with the features of claim 1 and the features of claim 10.
  • Since according to the method, the intensive cleaning of the container without chemicals and in a priority for the achievable cleaning effect intensive cleaning step or in at least one intensive cleaning station of the cleaning machine correspondingly long depending on automatically detected pollution level, time, energy and cleaning medium are saved and the cost of container cleaning is significantly reduced. Expediently, after the prepurification station, containers which have been detected as excessively dirty are discarded before the intensive cleaning step, preferably also containers which are no longer usable and / or damaged. The respectively detected level of contamination determines the length of the respective, for the final cleaning effect priority intensive cleaning step for the non-segregated container.
  • In the cleaning machine, the intensive cleaning is carried out in adaptation to detected levels of contamination so that each container is cleaned free of chemicals at least substantially as intense as it is just necessary due to its detected after the pre-cleaning station in the inspection device pollution levels. This avoids the intensive cleaning of some containers. At least one switch controlled by the inspection device directs the containers, depending on the detected contamination level, to different lengths of intensive cleaning lines parallel to one another. It will achieve a sufficient final cleaning effect without having to use significant thermal energy and / or chemicals. The pre-cleaning station also uses chemical-free pre-mixing and high-pressure water jets. In the intensive cleaning station, cleaning medium containing chemical-free granular material is irradiated under pressure, wherein the granular material either develops an intensive cleaning action when it comes to direct impact and / or removes and rinses off impurities by subsequent relative movement and friction influences.
  • The level of soiling of the non-segregated containers is limited to the cleanability of the cleaning medium in the intensive cleaning station by segregating heavily soiled containers after detection in the inspection device.
  • Suitably containers with differently detected pollution levels are dependent on the respective level of pollution in one of several different lengths of intensive cleaning introduced and thoroughly cleaned according to their degree of contamination at least inside. In order to carry out the intensive cleaning as efficiently as possible, it is expedient if the containers are intensively cleaned over a first or at least a second and a longer period of time, depending on the contamination level that can be better detected after the pre-cleaning. The longer the intensive cleaning is carried out, the more reliably even stubborn impurities are removed. However, this means that each container is only intensively cleaned just as long as necessary.
  • At least in the intensive cleaning station, e.g. blast cleaned with pressurized water or air as the carrier medium and granular ice, salt, nut shell granules or plastic material conveyed by the carrier medium. The granular material can be reusable or residue-free degradable or reprocessable, and developed for impurities first intensive cleaning abrasive action, even without the use of heat.
  • The abrasive cleaning action of grainy ice causes a particularly efficient cold shock to the contaminants, causing embrittled and contracted contaminants to be easily removed and removed. For this purpose, either dry ice from carbon dioxide or water ice (slurry ice) is sprayed or injected as a granular ice from chemical-free water. During the intensive cleaning, the dry ice is converted completely without leaving any residue into carbon dioxide, which is optionally filtered off with suction. The water ice, which melts during the intensive cleaning, rinses off any dissolved impurities. At about the same energy demand, the need for grainy ice and the amount of waste water are 90% to 95% lower than for conventional water-based processes with chemicals. Furthermore, there is no damage even on sensitive surfaces, as the grains of ice act gently, and no dust that would have to be removed separately. Compared to a water jet high-pressure cleaner with a water consumption of up to 500 liters per hour, when cleaning with water ice, eg slurry ice, only 55 liters of water per hour are consumed. The intensive cleaning success with, for example, formed as pellets ice grains is based on the cooling and embrittlement effect and the mechanical abrasive effect. Especially with dry ice, there are no liquid residues after intensive cleaning. In this case, for example, in the intensive cleaning 1.0 mm to 5.0 mm, preferably about 2.0 mm large ice grains, preferably pellets, with a pressure of about 3.0 bar to 15.0 bar, preferably about 5.0 bar and / or a speed of about 150 m / s to 500 m / s, preferably about 300 m / s, irradiated. This leads within a relatively short time to an intensive cleaning effect, preferably, in the interior of the container and in the mouth area.
  • Nut shell granules can also be brought into contact with the container surface by means of a carrier medium such that the nut shell granules make a relative movement on the container surface. Nut shell granulate is not only a cost-effective, "renewable" cleaning medium, but also provides a surprisingly efficient cleaning effect. Nutshell granules are available in large quantities and specifications almost anywhere in the world, and are universally suitable both for cleaning glass-made containers and plastic containers, such as PET bottles, since they have a moderately abrasive effect. Furthermore, nut shell granulate may be reusable and, in any case, readily biodegradable. With nut shell granules not only labels, label residues and glue from the outer surface but also e.g. Remove stubborn dirt from the inner surface of the containers quickly and efficiently. Nut shell granules having a particle size of about 0.1 mm to about 1.0 mm, preferably up to about 0.8 mm, are brought to act on the outer and / or inner container surface, optionally either dry or with water as the carrier medium.
  • The granular material, in particular the ice, is injected with the carrier material into the container under pressure to radiate the inner surface and is preferably, then or simultaneously generated relative rotation between the container and the pressure jets, and the radiated inner surface with the grained material and the substrate again processed, rinsed and finally cleaned.
  • In an expedient embodiment, the granular material is disinfected prior to the intensive cleaning process step in order to record any germs from the outside. In order to keep the costs for the use of materials as low as possible, it is expedient to collect excess and / or used cleaning media and at least to recycle as much as possible. This is especially true for water as the carrier medium or meltwater from the ice, which gets rid of the removed contaminants and cleaned and reused in the cycle.
  • In an expedient variant of the method, the container is at least partially filled with a mixture of water and nut shell granules or only nut shell granules for cleaning the container inner surface, and the container is shaken and / or rotated in order to exert the abrasive action on the inner surface. Standard soiling of the inner surface is thus removed particularly efficiently and quickly.
  • Each container is wetted with non-chemical water in at least one pre-cleaning step and pre-soaked for a predetermined period of time. Mainly External contaminants are then removed by high pressure water jets from chemical free water. This is done above all on the outside of the container, eg the label or a label sleeve. Subsequently, the container is intensively cleaned by pressure blasting with the granular material at least one further, also pollution-dependent predetermined period of time, and then rinsed with chemical-free water.
  • Final chemical-free disinfection can be carried out by applying and burning gas or a residue-free combustible substance, i. by a flame disinfection which uses a small amount of energy to ignite. Alternatively, it is possible to efficiently disinfect with ozone, which can be subjected to energy pulses, also to be eaten reliably into innocuous components.
  • To be on the safe side, incompletely cleaned containers can finally be detected by inspection even before the disinfection, and either removed, returned again for pre-cleaning or for intensive cleaning. As a result, the error rate of not sufficiently cleaned containers can be reduced almost to zero.
  • In an expedient embodiment of the cleaning machine, the intensive cleaning station is assigned a storage container for granular ice, salt, nut shell granules or plastic material, in particular for ice pellets, and a metering device for the granular material, a blasting machine with at least one blasting gun and at least one blasting nozzle, wherein the blasting nozzle and / or the blasting gun, preferably and can be arranged to increase or adapt the cleaning effect, controlled movable and / or rotatable or can. It may be optimally appropriate to provide for the granular material, a disinfecting device to enter in the intensive cleaning no germs from the outside. The storage container, the metering device and the pressure blasting machine are specially designed for storing and processing the respective granular material. This material-specific design contributes the processing behavior of the granular material, eg Nutschalengranulats, specially account.
  • In a further embodiment, at least the pre-cleaning station and the intensive cleaning station have liquid collecting means which may be connected to cleaning and reprocessing devices which are contained directly in the cleaning machine or placed outside thereof. In this way, at least water is used in the circulation with only negligible losses of wastewater actually discharged. Dissolved impurities are discarded and eliminated.
  • In an expedient embodiment, at least two intensive cleaning sections of different lengths are provided in parallel in the intensive cleaning station, and linked via points. The switches are controlled by a container inspection station depending on the detected level of contamination of the containers being conveyed to the intensive cleaning station. The different lengths of intensive cleaning sections allow the intensive cleaning of the containers, for example, in parallel and at the same time in groups with different degrees of contamination, to which the respective intensive cleaning step is adjusted, so that each container is individually cleaned only as intensively as just needed. Incidentally, the conveying path in the cleaning machine can run continuously or comprise sections of different movement speeds, for example with buffer sections, and auxiliary conveyor sections for hanging transport of the containers if the main conveyor section should be designed for vertical transport. When injecting or blasting with the granular material, components of the blasting system may optionally move with it, or the containers may be temporarily stopped locally for a short time.
  • The cleaning machine can be designed as a rotary or linear runners, for example, depending on the available space.
  • The subject invention will be explained with reference to the drawings. Show it.
  • Fig. 1
    a schematic representation of a cleaning machine for containers, here bottles of plastic or glass,
    Fig. 2
    an enlarged section of the cleaning machine of Fig. 1 , and
    Fig. 3 to 5
    Schematic diagrams to illustrate a process step in the intensive cleaning of the container.
  • One in the Fig. 1 and 2 shown cleaning machine W is used, for example, for cleaning containers B, which are returned at least mainly by the reusable principle of consumers and filled again. Specifically, these can be plastic or glass bottles for the beverage industry, for which a very high standard of cleaning and hygiene standards must be observed for refilling.
  • The in the Fig. 1 and 2 shown cleaning machine W is designed as a linear rotor, but could alternatively be designed as a rotary.
  • In the cleaning machine W several stations 1 to 10 are connected in series in the conveying direction of the container B. Through all stations, a conveyor line 11 extends to the vertical transport, the auxiliary conveyor sections 29 are associated in parallel, for example, for hanging transport or overhead transport.
  • Station 1 is an unpacking and pre-softening station. The containers B are lifted by means of a gripper 13, 16, for example, from transport containers 12 and placed on the conveyor line 11, for example a conveyor belt, in such a way that the container openings point upwards. From a pre-softening device 15 with water spray nozzles 22 ', the containers are both on the outer surface as well as being internally wetted with water that may be at room temperature and free of chemicals to pre-penetrate inside and / or outside debris and any labels or label sleeves.
  • In the inlet of the station 2, which is a pre-cleaning station, a pre-softening section 3 is provided, which is associated with a turning device 18, which places the containers standing on the auxiliary conveyor section 29 upside down, so that the water introduced for pre-soaking can optionally proceed with dissolved dirt , In the station 2, high-pressure jet nozzles 22, possibly movable, are arranged at least on the upper side and on the lower side, which remove dirt, glue and labels with high-pressure water jets ("carpers"). The effluent water is collected with the detached impurities from collecting devices 17, fed to a pre-cleaning device 23 and then cleaned in a main cleaning device 20 and recycled via a line 14 in the circuit. In the precleaner 23, solids and solid contaminants may be secreted at 19. In the main cleaning device 20, "real" wastewater can be removed at 21.
  • In the outlet of the pre-cleaning station 2, a further turning device 18 is provided, which turns the container B by 180 ° and turns off on the conveyor line 11 before the pre-cleaned container B run into the next station 4, which by means of an inspection device 24 u.a. serves for differentiation of contamination.
  • The next station 5 is an intensive cleaning station, in which the containers B are thoroughly cleaned with at least one at least largely chemical-free cleaning medium. In the course of the conveying section 11 in the station 5, three points 25, 26 and 27 may be provided. The switch 25 is controlled, for example, by the inspection device 24 in order to separate a predetermined detected contamination level, no longer to be cleaned, faulty or no longer usable container and, for example, to promote a collector 33. The switch 26 located further downstream is, like the switch 27 further downstream, associated with a second intensive cleaning section 11b which is parallel to the here straight intensive cleaning section 11a in station 5 but longer. At least the switch 26 may be controlled by the inspection device 24 to selectively deliver containers via the longer intensive cleaning section 11b or the shorter intensive cleaning section 11a, depending on the detected contamination level, which is lower than the contamination level previously detected for purging. Between the switches 26, 27, the successively conveyed containers can be spaced, so that from the second intensive cleaning section 11 b again returning containers are easily einschleusbar in the first intensive cleaning section 11a.
  • In the station 5, a blasting machine A is arranged, which processes, for example, granular material R, for example, directly or by a carrier medium such as air or water at high pressure and high speed at least abrasive to the container B is brought into action, preferably in the interior and Mouth area of the container. The high-pressure blasting system A is closer to the Fig. 2 explained. Downstream of the blasting machine A, means 28 may be provided for causing the containers to rotate while being conveyed. The relative movement thus generated between the filling of the cleaning medium and the container serves for further purification.
  • The means 28 provided downstream of the blasting machine A, for example, may be additively combined with means 28 'which set the containers in a shaking motion, or alternatively may be replaced by the means 28' which provide either only dry granular material R or at least a partial filling in a mixture with a carrier medium such as water for internal cleaning in a shaking move. The shaking of the containers for internal cleaning is particularly useful when using Nutschalengranulat as the granular material R.
  • The station 6 includes a further turning device 18, in which the container B conveyed upright are brought into an overhead position in order to empty it. The following station 7 is a rinsing station, in which the overhead containers are flushed with water or high pressure water inside and outside. The stations 6, 7 as the station 2, a pre-cleaning device 23 and a main cleaning device 20 for trapped water and optionally granular material R or molten ice downstream, the purified water, here the blasting machine A, feeds and separates water collected in collecting devices 17 from impurities.
  • The station 8 includes a further inspection device 24 for automatically detecting any residual contamination, wherein a reject station and / or return device, not shown, is controllable by the inspection device 24 in order to eliminate insufficiently cleaned containers or to return them to the station 2 or the station 5.
  • The disinfection station 9, for example, for flame disinfection of the above-funded container B, contains nozzles 30 which are fed from a reservoir 31 with a gas such as ozone or a residue-free combustible substance to fill the containers before an ignition device 32 initiates combustion In order to carry out the disinfection of the containers with the resulting flames, especially on the inside and in the mouth area also outside. It is expedient to work in the disinfection station 9 with ozone which, preferably, can be acted upon by at least one energy impulse, eg piezoelectrically, in order to disinfect sustainably, thereby consuming residues (eg decomposing into oxygen and free radicals).
  • At the disinfection station 9 is followed in the station 10, a further turning device 18, which transfers the container B from the overhead position again to the vertical transport on the conveyor section 11.
  • Fig. 2 schematically illustrates the stations 4 and 5 of the cleaning machine W of Fig. 1 , In this embodiment of the cleaning machine W, the station 5 is designed with the here two (or more) different length intensive cleaning sections 11a, 11b for intensive cleaning using a granular material R. This granular material R should have a certain grain size, can be added residue-free, or even in the intensive cleaning use up residue, eg as slurry ice completely melt to water, do not generate dust, and the surface, especially in the mouth area or inside the container do not injure, but pre-soaked, for example, completely remove impurities, at least with impact energy and / or abrasive action.
  • The granular material R may be made of metal, plastic, sand, salt or the like, with salt providing the advantage of dissolving gradually, at least in contact with some water. Alternatively, the granular material R is in Fig. 2 Ice, either dry ice from carbon dioxide or water ice (slurry ice) from chemical-free water, for example in pellet form with a certain grain size.
  • The ice grains are conveniently conveyed and applied under pressure directly or with a carrier medium. The carrier medium M is either compressed air or pressurized water. The ice blasting technique combines several advantages. The approximately 2.0 mm large ice grains or particles are, for example, with compressed air, applied at a pressure of about 5 bar to the surface to be cleaned or injected into the container. The ice grains clean by their impact energy and abrasion by mechanical means. They gradually melt and rinse off contaminants from the surface. Dry ice from carbon dioxide evaporates without residue. The ice blasting technique can be used with water ice (slurry ice) even in confined spaces. For dry ice, the extraction of the resulting carbon dioxide is recommended. Even sensitive surfaces are not damaged by the relatively soft ice grains during intensive cleaning. Therefore, there is no dust that would have to be removed separately. As already mentioned, 5 rotating devices 28 are provided in the station in order to rotate the containers, which are at least partially filled with the cleaning medium (granular material R and carrier medium M, such as air or water), either in one direction of rotation or in alternate directions of rotation, while being conveyed on, so that between the cleaning medium filling in each container and the inner wall of the container, a relative rotational movement occurs in the loosened or largely dissolved contaminants are finally rinsed and kept in motion, and in particular the granular material R, the inner wall continues to be subjected to abrasive and together with the carrier material is rinsed, wherein the granular material is brought by centrifugal force to the outside and in contact with the inner wall. Thus, the granular material comes into effect twice, first when pressure blasting from the blasting gun 40, and then during the rotational movement.
  • In the case of ice as granular material R (dry ice or water ice), the granular material also has at least two cleaning effects. In addition to the abrasive effect, i. due to the impact energy when blasting the inner wall of the container B or when injecting into the container, struck impurities, if they have not been immediately broken up and peeled, by the strong supercooling (in the case of dry ice from carbon dioxide, for example -79 ° C) together and become brittle. By resulting thermal stresses and under the influence of the impact or kinetic energy of the ice grains then solve this contamination easily from the surface. At least the subsequently encountered ice grains completely remove these already partially dissolved impurities. In the case of dry ice, this dissolves completely in gas after impact, which goes back to the atmosphere from which it was originally recovered. In the case of dry ice, there are practically no liquid residues, so that the abrasive cleaning effect during blasting, possibly with several cycles of movement of the blasting nozzles 41 or blasting gun 40 up to the bottom of the container, is very efficient. If necessary, additional water could also be used. In the case of grains of water ice, irradiated directly or with compressed air or pressurized water, this gradually melts, whereby washed-off impurities are efficiently washed away and kept in a circulating movement in the container, and do not settle again.
  • The station 5 in Fig. 2 that the intensive cleaning station of the cleaning machine W, for example, from Fig. 1 represents, has a reservoir 34 for granular material R, in particular ice pellets such as slurry ice cream, or is connected to such. The reservoir 34 may be insulated and / or cooled. From the reservoir 34, a supply via a metering device 35 to a mixing device 37, to which also a supply 38 for the carrier medium M, here water, for example, from the station 6, 7 or chemical-free pure water is connected. In this feeder 38, a pressure and / or flow control device 39 or the like may be included. In the case of dry ice from carbon dioxide or slurry ice, the mixing device 37 can be supplied with compressed air, for example from a compressor, via a pressure regulating and quantity setting device.
  • In order to ensure that no additional germs are introduced during the intensive cleaning, a disinfection device 36 may be provided at least for the granular material R.
  • From the mixing device 37, at least one jet gun 40 is fed, which, preferably, special high-performance nozzles 41 has, and, optionally, in the direction of the arrows in Fig. 2 relative to the conveyor line 11, 11a linear and / or rotationally adjustable.
  • In the event that at least two different lengths of intensive cleaning sections 11a, 11b and the switches 27 are provided downstream of the blasting gun 40 (suitably a group of blasting guns) a separating device 42 is provided to space the successively transported along the conveyor section 11 container B.
  • For example, fall in Fig. 2 the ice grains from the reservoir 34 via the metering device 35 in a Ausgangskrümmer the blasting gun 40, which is fed with compressed air and generates a relatively gentle suction pressure for the ice grains. The compressed air accelerates the ice grains to about 300 m / s. The precisely calculated high-performance jet nozzles 41 now blast the cleaning medium from the ice grains (pellets) and the compressed air onto the surface to be cleaned, for example the inner surface and the mouth region, of the container. It can be worked with a pressure of about 5 bar. Of course, the aforementioned grain sizes, the pressure range and the speed can be varied in a wide range.
  • If the granular material is metal, plastic, sand, salt or the like, either compressed air or pressurized water can also be used as the carrier medium. The use of ice, especially slurry ice, as the granular material is preferred because it is less aggressive for the containers and either evaporates or melts into water. For other granular materials used granular material that is surplus or used accumulates eg collected on the collection devices 17 (troughs or the like.) And previously separated in the reprocessing of the water and separately reprocessed. Salt, on the other hand, can be dissolved in dissolved form during the treatment of the water by desalting and either disposed of or reused.
  • As the granular material R, it is expedient to use a nut shell granulate, for example having a particle size of about 0.1 mm to 1.0 mm, preferably up to about 0.8 mm, for cleaning the containers inside and / or outside in the intensive cleaning station. Nutshell granules are a cost-effective cleaning material that is biodegradable and possibly easily recyclable, and is available almost indefinitely in virtually unlimited quantities worldwide as a renewable resource, and is, for example, a waste product of production processes that process nut kernels. The nutshell granules can be sprayed dry and / or filled in the intensive cleaning dry or, for example, with water as a carrier medium. For interior cleaning with nut shell granules, the container can be shaken and / or rotated, whereby e.g. Standard contaminants quickly peeled off and easily removed. When cleaning the exterior, nut shell granulate has proven to be particularly efficient for removing labels, label residues and glue or glue residue.
  • In the station 5, several substations each with blasting guns 40 and jet nozzles 41 could be used, where, appropriately, the containers could be turned between these substations, to be discharged in each case its content of cleaning medium and dirt. Appropriately, there is a certain residence time in the station 5, within which the cleaning medium acts agitated at least in the interior of the container. After the containers leave station 5, they ( Fig. 1 ) is turned by the turning device 18 in the station 6, so that its contents flow away (which is collected and optionally recycled with separation of no longer usable sub-substances) before the containers are rinsed in the station 7 with chemical-free water.
  • The Fig. 3 to 5 illustrate schematically the process in the intensive cleaning of a container B, for example, in the station 5 in the Fig. 2 and 1 ,
  • The empty, with the mouth area facing up on the intensive cleaning section 11a standing container B is in Fig. 3 from the jet nozzles 41 with pressure jets 43 applied, which are generated from the granular material R and optionally the carrier medium M, for example, from compressed air fed with dry ice or water ice pellets. The blasting gun 40 is inserted with the underlying blasting nozzles 41, for example, in the container B to gradually radiate upward from the container inner bottom, the inner wall. In this case, the jet nozzles 41 can be moved up and down in the direction of the arrows shown, and / or rotated. Optionally, jet nozzles 41 are also provided on the blasting gun 40 for cleaning the outer mouth region. Furthermore, a plurality of jet nozzles 41 can be provided over the length of the blasting gun 40.
  • In an alternative embodiment, the blasting gun 40 / blasting nozzle 41 is placed substantially stationary so as to inject the cleaning medium only into the container B, e.g. the container can either be stopped for a short time, or the blasting gun can move with the container for a short time, or the injection takes place only over the period of time during which the container B passes through the blasting nozzle 41.
  • In both cases is according to Fig. 4 then a filling or partial filling of the granular material R and the carrier medium M contained in the container when the container B moves from the area of the blasting gun 40. Now, the container B is rotated by the rotors 28 in a rotation, for example, about its vertical axis, so that for further cleaning between the filling with liquid friction to the container and the inner wall, a relative movement is formed in the loosened or dissolved impurities finally removed and taken and in motion held, and for example, by centrifugal forces or the flow dynamics, the granular material R is still pressed against the inner surface, and also with mechanical friction detaches any contaminant residues, which are then held in the filling of the granular material R and the carrier medium M in motion, and do not settle anymore. In this case, a predetermined residence time is maintained for this intensive cleaning in the intensive cleaning section 11a, which can be directed, for example, individually according to the detected by the inspection device 24 pollution level. With a higher degree of contamination, the affected containers in the longer intensive cleaning section 11 b are treated longer. Subsequently, the in Fig. 5 Turned container shown by the turning device 18 so that the filling of the granular material R, the carrier medium M and the detached contaminants can flow, with a certain amount of time is allowed, so that the containers drip well before they are in the station 7 with water be rinsed intensively.
  • In Fig. 4 As an alternative or in addition to the means 28 for rotating the containers, at least one means 28 'for shaking the containers may be provided to expose them to the inner surface during the internal cleaning of the abrasive action of the granular material R. Shaking, with or without simultaneous rotation, is particularly useful when using nut shell granules as the granular material R.
  • In the disinfection station 9, gas or another residue-free combustible substance is injected into the container B and ignited, for example, and the flame produced after the ignition is also aimed at the outside of the mouth region of the container to disinfect this area. Preferably, working with ozone, and optionally piezoelectrically generated energy pulses of a generator.
  • The largely chemical-free and without significant use of thermal energy carried out process with Sluny ice, rejection to heavily polluted or no longer usable container B even before the intensive cleaning, at least one penalty of heavily contaminated containers, and the disinfection with ozone is particularly useful for several reasons and cost-effective. The automatic inspection and separation prior to the intensive cleaning will limit a pre-determined permissible level of soiling that is deliberately sensitive to the cleanability of the granular material R, e.g. Slurry ice cream, can be tuned. Hardly or few soiled containers B are then cleaned quickly. Heavily soiled containers B, optionally up to the predetermined level of soiling, are cleaned longer or even several times, optionally with renewed application of the granular material, it being possible to apply multiple granular material along the intensive cleaning section. In the case of slurry ice or water ice, this melts into water, which is removed by turning the container with the contaminants only by gravity and / or rinsed residue free with pure water. Due to the drainage-related residence time until disinfection, the intensively cleaned surfaces are only slightly wetted, if at all, so that the ozone can play its disinfecting effect very efficiently, if necessary supported by energy impulses which act simply on the piezoelectric way (or in another way) in the ozone. which is consumed without residues in oxygen and free radicals. Overall, an immense cost savings is achieved, compared with conventional methods, especially since no chemicals, hardly any externally or in cleaning media introduced thermal energy, and much less water are used.
  • The containers, which are particularly discarded at the inspection station 24, do not necessarily have to be discarded, but can be collected for further cost savings and transferred to other, e.g. be cleaned more aggressively separately or specially pre-cleaned and then reintroduced into the process for a new attempt. Because this may well be a significant proportion of all containers to be cleaned, which is deliberately discarded initially to limit the predetermined and on the process and / or the cleaning ability of the granular material R, in particular slurry ice, coordinated pollution level.
  • An important aspect is to produce in the intensive cleaning, for example, on the process efficiency or the cleaning effect of the granular material deliberately limited pollution level by discarded as unsuitable detected containers. This is conveniently done after the pre-cleaning to achieve higher detection accuracy. It may also be expedient to arrange a rinsing station between the intensive cleaning station and the disinfection station, in which the containers are rinsed or rinsed with chemicals-free water, if appropriate for reasons of safety.

Claims (14)

  1. Method for cleaning containers (B), in particular bottles of glass or plastics, in a cleaning machine (W) in which in several stations (1 - 9) comprising at least one pre-cleaning station (2) and at least one downstream intensive cleaning station (5) by process steps executed therein at least one cleaning medium is allowed to act with a cleaning effect under pressure on and/or in the containers (B) conveyed through the cleaning machine (W) characterised in that the contamination level of the containers (B) is automatically detected downstream of the pre-cleaning station ((2) and prior to at least one intensive cleaning step by inspection for differentiating between contaminations, and that containers (B) having a predetermined detected contamination level are sorted out and non-sorted out containers (B) are individually and free of chemicals intensively cleaned in at least one intensive cleaning step depending on the detected contamination level of those non-sorted out containers as long as just necessary for the detected contamination level with a cleaning medium (RM) containing a granular material (R), which detected contamination level is lower than the contamination level predetermined for sorting out containers.
  2. Method according to claim 1, characterised in that relative rotational and/or shaking movements of the containers are controlled and/or that already intensively cleaned containers repeatedly are cleaned intensively.
  3. Method according to claim 1, characterised in that the contamination level of the containers (B) which are to be cleaned intensively in the intensive cleaning station (5) are limited by sorting out of containers (B) prior to the intensive cleaning step with a view to the cleaning capability of the cleaning medium (RM) in the intensive cleaning step.
  4. Method according to claim 1, characterised in that each non-sorted out container (B) is introduced depending on the respective detected contamination level into one of several differently long intensive cleaning section (11 a, 11b) and is individually at least at the inner side intensively cleaned just as long as necessary for the detected contamination level.
  5. Method according to claim 1, characterised in that at least the inner surface of each non-sorted out container (B) at least is blasted with granular ice, salt, nutshell granulate or plastic material conveyed under pressure in water or air as carrier medium (M),wherein ice, salt, nutshell granulate or plastic material preferably being recyclable and/or degradable without residuals.
  6. Method according to claim 5, characterised in that dry ice made from carbon dioxide or water ice like slurry ice is blasted on or is injected.
  7. Method according to claim 5, characterised in that containers (B) at least partially filled with the mixture of water and nutshell granulate or with nutshell granulate only are shaken and/or rotated during the intensive cleaning step.
  8. Method according to claim 1, characterised in that the containers during at least one pre-cleaning step in the pre-cleaning station (2) are wetted substantially on all sides with water which is free of chemicals, that internal contaminations are pre-soaked for a predetermined time duration and that the containers are pre-cleaned at the outer sides by high pressure jets with pressurised water which is free of chemicals.
  9. Method according to claim 8, characterised in that prior to a disinfection step following an intensive cleaning step still incompletely cleaned containers (B) are detected by automatic inspection and are sorted out or re-introduced into the pre-cleaning station (2) or into the intensive cleaning station (5).
  10. Cleaning machine (W) for containers (B), in particular bottles of glass or plastic, with several stations (1 - 9) arranged along at least one container handling and conveying line (11, 29) and comprising at least one pre-cleaning station (2) including a high pressure water jet and pre-soaking, pre-cleaning section (V) and at least one downstream intensive cleaning station (5), within which containers (B) conveyed through the cleaning machine (W) are cleaned with a cleaning medium (RM) at least applied inside under pressure, characterised in that an inspection station (4) having an inspection device (24) for detecting container contamination levels, for differentiating between contamination levels and for sorting out containers (B) having a detected predetermined contamination level which is limited with a view to the cleaning capability of the cleaning medium (RM) during the intensive cleaning step, and for conveying non-sorted out containers having a detected contamination level which is lower compared to the predetermined contamination level into the intensive cleaning station (5), and that in the intensive cleaning station (5) assemblies (25, 26, 27, 28, 28', 35, 37, 38, 39) influencing the cleaning capability of the cleaning medium (RM) are provided, among which at least one assembly (25, 26, 27) is formed as a switch can be controlled via the inspection device (24) in order to direct non-sorted out containers (B) into differently long parallelly arranged intensive cleaning section (11 a, 11b) and to clean them depending on the detected contamination level free of chemicals and with the cleaning medium (RM) containing the granular material (R) individually and intensively as long as just necessary for the respective detected contamination level.
  11. Cleaning machine according to claim 10, characterised in that the assemblies (28, 28', 35, 37, 38, 39, 25, 26, 27) include at least one assembly out of the following groups: assemblies for moving a blasting system (A) and/or of blasting pistols (40) and/or of blasting nozzles (41) for rotating and/or shaking the containers (B).
  12. Cleaning machine according to claim 11, characterised in that a storage container (34) for granular ice, in particular ice pellets and/or salt and/or nutshell granulate and/or plastic material and as assemblies (35, 37, A) a dosing device for the granular material (R) as well as a mixing device for the cleaning medium (RM) and a pressure blasting system having at least one blasting pistol (40) with at least one blasting nozzle (41) are associated to the intensive cleaning station (5), which blasting pistol (40), preferably, is moveable in controlled fashion.
  13. Cleaning machine according to claim 10, characterised in that at least the pre-cleaning station (2) and the intensive cleaning station (5) comprise cleaning medium (RM) collecting assemblies (17) to which cleaning and recycling assemblies (20, 23) are directly associated or which collecting assemblies (17) are connected with cleaning and recycling assemblies.
  14. Cleaning machine according to claim 10, characterised in that at least two differently long, parallel intensive cleaning sections (11 a, 11 b) are provided in the intensive cleaning station (5).
EP11180055.3A 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine Active EP2394750B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102009039762A DE102009039762A1 (en) 2009-09-02 2009-09-02 Method of cleaning containers and cleaning machine
EP10166144.5A EP2292340B1 (en) 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP10166144.5 Division 2010-06-16
EP10166144.5A Division EP2292340B1 (en) 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine
EP10166144.5A Division-Into EP2292340B1 (en) 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine

Publications (2)

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EP2394750A1 EP2394750A1 (en) 2011-12-14
EP2394750B1 true EP2394750B1 (en) 2014-07-23

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EP10166144.5A Active EP2292340B1 (en) 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine
EP11180056A Pending EP2394751A1 (en) 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine

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EP11180056A Pending EP2394751A1 (en) 2009-09-02 2010-06-16 Method for cleaning containers and cleaning machine

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US (1) US8574371B2 (en)
EP (3) EP2394750B1 (en)
CN (1) CN102000684B (en)
BR (1) BRPI1003464A2 (en)
DE (1) DE102009039762A1 (en)

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DE102009039762A1 (en) 2011-03-03
US20110067730A1 (en) 2011-03-24
CN102000684B (en) 2014-10-01
BRPI1003464A2 (en) 2012-05-29
US8574371B2 (en) 2013-11-05
EP2394750A1 (en) 2011-12-14
EP2394751A1 (en) 2011-12-14
EP2292340B1 (en) 2014-07-23
EP2292340A1 (en) 2011-03-09
CN102000684A (en) 2011-04-06

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