KR20060072524A - A lowest temperature bottle dry cleaning method and system therefor - Google Patents

Abstract

The present invention relates to a glass bottle cryogenic dry cleaning method and a system for cleaning a glass bottle made for various liquor, food and beverage or by removing a label attached to a distributed glass bottle and contaminant foreign substances.

The invention simultaneously or selectively produced in the soft dry ice for the pellet and the CO ₂ snow production is that using a CO ₂ dry ice properties of cryogenic temperatures, to produce at least one or more of CO ₂ dry ice to the solid dry ice, thus producing Buffer the prepared CO ₂ pellets and compress the CO ₂ snow dry ice to atmospheric state, and then mix with cryogenic compressed air from the outside to form cryogenic CO ₂ aerosol therefrom, and at the same time through a separate heat exchanger Mixing with nitrogen or argon to produce CO ₂ snow aerosol, supplied vials to be cleaned to pass the first and second cleaning processes in order to perform the first and second cleaning processes sequentially. , The filling valve is installed in the glass bottle via the 4th government, and the cryogenic hard dry ice cleaning process and / Is a cryogenic soft dry ice can be applied to a cleaning process, a glass bottle for cleaning a glass bottle by introducing a hybrid cleaning process as required cryogenic dry cleaning method and system.

Hard dry ice, soft dry ice, pellets, cryogenic dry cleaning, cryogenic CO2 aerosol cleaning, hybrid cleaning

Description

A Lowest Temperature Bottle Dry Cleaning Method and System therefor}             

Figures 1a, 1b, 1c and 1d are simplified views of the description of the technical principles applied to the present invention,

Figure 2 is a flow chart showing the step of performing a cryogenic hard dry ice cleaning in accordance with the present invention,

Figure 3 is a block diagram showing a cryogenic dry cleaning system according to performing the cryogenic hard dry ice cleaning step by step in accordance with the present invention,

4 is a cross-sectional view of the cryogenic dry cleaning device according to the present invention from above;

5A, 5B and 5C are schematic views showing a state in which the dry ice cleaning area of the outer surface of the glass bottle is cleaned;

6A and 6B are views showing dry ice cleaning of an inner surface of a glass bottle that is upright or inverted.

※ Brief description of main drawing codes ※

1: CO ₂ dry ice storage tank, 2: CO ₂ hard dry ice maker

3: CO ₂ Hard Dry Ice Buffer 4: Drum

10: glass bottle cleaning device 20: supply conveyor device

20: cleaning conveyor apparatus 42, 43, 43 ', 44, 44', 45: nozzle

50, 51, 52: box 60: recovery conveyor apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment for washing or washing to recover and recycle the glass product such as glass bottles containing the contents of various alcoholic beverages and food and beverages, so as not to be discarded after use. A glass bottle cryogenic dry cleaning method and system for removing contaminants such as labels, etc., and quickly and reliably removing contaminants contained in the interior of glassware and internal surfaces. It is about providing.

Glass products are the most frequently recovered and recycled, which is a returnable glass bottle, and the outer surface of the glass bottle is labeled for market distribution. The label is made of paper and used as a main ingredient, glue glue, Casein, which is known to facilitate the dropping of labels for the recycling of glass bottles.

Conventionally, a chemical wet cleaning method is adopted as a cleaning method for removing the label, and a bottle washer is currently used as the most efficient and economical method worldwide.

This device varies depending on the type, but it basically goes through prerinsing → soaking → rinsing → final rinsing process, especially caustic soda (NaOH), which is the most effective and cheapest solution. And several supplements are used to clean and sterilize.

Occasionally, the contamination is very severe, resulting in poor cleaning due to incomplete cleaning due to the limitations of chemical wet cleaning. This sometimes affects the quality of the product, which not only becomes a social problem but also affects the existence of a company.

In addition, a one-way bottle, which is used for single use and is disposed of immediately, may not be intended for recovery, so that a poorly soluble synthetic resin having a strong adhesive force in order to reduce dropout during distribution or storage to a predetermined portion of its outer surface. Labels may be attached using adhesives. For this reason, it is impossible to wash | clean by the above described three weapons. Correspondingly, such label removal takes a long time and is cumbersome because the method of removing the label by dipping the cured adhesive by dipping the glass bottle to a specific drug for a predetermined time in the deposition step and then peeling off the label by manual labor etc. After the label is removed, the outside and inside of the container is cleaned.

In addition, in order to recycle the glass bottle by another method, a method of incineration of the label of the glass bottle in a high temperature atmosphere of about 300 ° C to 700 ° C is used. As a representative example, Korean Patent No. 444129 is disclosed.

This patent applies a shock-proof solution to the glass bottle to prevent thermal shock, passes it through an incinerator at about 600 ° C to 800 ° C, and forces it to cool immediately after incineration of the label. However, this method also requires a lot of manual labor through several steps, and after the label is removed, the outside and inside of the container is cleaned.

Meanwhile, a conventional bottle washing machine or a glass bottle cleaning device may include a label removing device, and the representative prior arts are US Patent Nos. 3,946,750 (March 30, 1976) and 4,667,690, which are chemical solutions or water. Wet method is used.

U. S. Patent No. 3,946, 750 relates to a label remover for a bottle cleaning apparatus, wherein glass bottles are placed upright in the pockets of the conveyor on the bottom of the guides, and at the center of the bend of the large volume of nozzles supplied by the supply manifolds. Pass through the bottom. Upon label removal, the vials will be under a certain level of corrosion bath in the cleaning apparatus, and if an open slot is placed in the suction channel on the bottom of the bend guide, the vials will be cleaned and the label will be removed from the aqueous solution of corrosion. At the same time, the vial in the pocket is cleaned while passing through the jet nozzle.

U. S. Patent No. 4,667, 690 relates to a glass bottle cleaning apparatus, wherein the glass bottles are supplied and cleaned by a conveyor facility. The incoming glass bottles are loaded by a receiving device consisting of a conveyor with vertically extending channels and carried by the conveying device to the washing station and the draining station. The cleaned glass bottles are loaded from the conveying device to the recovery device, transported to another conveyor device, and shipped. The glass bottles are rotated about 180 degrees during transport, so the product is ready to be filled.

In this patent, the cleaning station is installed on a rotating plate in which the spray nozzle is rotatably installed on the circular plate. The spray nozzle has a nozzle duct inclined with respect to the center of rotation thereof so that the cleaning liquid is sprayed along the inclined axis. To this end, the rotating plate is rotated by a belt and the circular plate and the vial are rotated accordingly, the vial is held by a holder supported by the support plate, and the inside thereof is washed. Such a configuration discloses a washing apparatus applied to wet cleaning, and is currently applied in various forms as a general technique, and may be particularly effective in the present invention as described in detail below.

Considering these points, in the processing of the glass bottles, the label on the outer surface of the glass bottle is removed, and the inside of the product is contaminants due to the residue of the product, the inflow of foreign substances due to the neglect of the glass bottle, or the adhesion of organic substances that are not sanitary. The use of water or chemical corrosion solutions or chemicals by wet cleaning or washing the contaminant layer or the like on the inner surface due to the formation of has a limit. The reason for this is that it is necessary to consider various conditions such as the selection of chemicals and treatment place in the environmental aspect as described above, and also has the disadvantage that the cleaning process becomes complicated.

It may be very desirable to overcome these shortcomings, and may be very desirable if dry cleaning or cleaning methods are possible, as part of it. Accordingly, the present invention will be devised, and will be considered as follows.

The most common use of dry cleaning is the semiconductor industry. For example, carbon dioxide (CO ₂ ) and argon gas are used to remove fine contaminants from the surface of wafers, flat panel panels (FPDs), LCDs, and glass substrates. (Ar) was used.

In particular, carbon dioxide (hereinafter referred to as CO ₂ ) used for dry cleaning is a colorless, odorless gaseous substance at room temperature in which one carbon atom and two oxygen atoms are combined, and the mass ratio of carbon and oxygen is about 3: 8 and 0.03 in the atmosphere. % Is included.

Upon cooling under high pressure to -87.8-69.9 ℉ liquefied CO ₂ (Liquid CO ₂₎ can be made to, the critical point of CO ₂ will appear at 31 ℃, 72.8ATM, 1071psi, especially solid CO ₂ to be formed is below -69.9 ℉ It is a sublimable solid called dry ice.

This CO ₂ is applied in terms of cleaning, so it is easier to remove foreign substances due to thermodynamic and physical interactions with foreign objects on the surface of an object, ie, a glass bottle, and sublimate in the air, resulting in new pollutants. Does not cause In addition, it has the advantage of not damaging the surface of the glass bottle to be cleaned.

In this respect, as the well-known cryogenic dry carbon dioxide cleaning, the cryokinetie source for cryogenic cleaning is CO ₂ . There are _two types of cleaning methods: hard dry ice cleaning by CO ₂ pellet blasting and soft dry ice cleaning using CO ₂ snow blasting. There is a way to parallel this form. Hard-dry ice cleaning is a high pressure spray of CO ₂ pellets with a media size of 2 ~ 10㎜. It is suitable for “Heavy cleaning”, coating, cement, adhesive, grease, oil, marine gross. (Marin growth), Effective for removing rust.

Soft dry ice cleaning is a medium size that accelerates submicron CO _₂ snow emissions. It is suitable for precision cleaning and removes contaminants, thin films, layers, fluxes and fingerprints. ) Efficient for removal but not suitable for removal of rust, paint, grease or heavy oil species. As representative of this technique, Korean Patent No. 419199 (2004.02.05) discloses a sublimable solid particle spray nozzle for surface cleaning, which has a structure of increasing cleaning power while reducing consumption of cleaning medium.

In general, the characteristics of the cleaning are slightly different depending on the CO ₂ state, but the mechanism of the cryogenic CO ₂ cleaning has the following four characteristics. Referring to the drawings, FIG. 1A shows kinetic energy generation by physical ejection or physical blasting using particle kinetic energy, and FIG. 1B shows thermal differential on between contaminants and cleaning surfaces. FIG. 1C shows a sublimation expansion (× 800), which is a volume expansion by sublimation of solid and liquid CO ₂ , and FIG. 1d illustrates a cleaning method using an aqueous solution of CO ₂ capable of separating organic contaminants of liquid CO ₂ .

Hard dry ice cleaning, on the other hand, uses solid hard dry ice where liquid CO ₂ is produced under cryogenic cooling in a high pressure atmosphere, and pellets are produced below the critical point of CO ₂ , for example, below -69.9 ° F.

In addition, the soft dry ice cleaning is subjected to a process for producing an aerosol of the soft dry ice to use the cryogenic CO _₂. For this, the gaseous CO ₂ in order, and supplied to the CO ₂ in the gas phase heat exchanger, the heat exchanger was liquefied point close to cool the CO ₂ in the gas phase using a cryogenic nitrogen to form a nucleus of a drop of fluid passes through the heat exchange A CO ₂ adiabatic expansion at low pressure results in swelling and swelling, allowing solids to be produced and stored in the carrier source.

In the case of the liquid CO _2, the supply heat exchanger the CO ₂ in the liquid phase, and a heat exchanger to close to the heating point vaporize the CO ₂ in the liquid phase to form the nucleus of a bubble of vapor, the CO ₂ passed through a heat exchanger Compression again to high pressure results in freezing and condensation to produce solids and store in the carrier source. The solids from the carrier source to the cleaning medium are adiabaticly expanded at low pressure at the nozzle or sprayed or ejected at high pressure to become aerosols that can be cleaned. As a well-known technique, an aerosol generating system for surface cleaning is disclosed in Korean Patent No. 385432 (2003.05.14).

This cryogenic aerosol is a cleaning method that cleans contaminants that form particles or thin films on the surface by spraying. Korea Patent Publication No. 2003-0036217 (2003.05.09) uses “carbon dioxide cleaning” which uses this technique. To remove the edge beads from the spin-on material. In other words, the technology expands the fluid through the nozzle while rotating the coating substrate to be cleaned to form a stream of cryogenic aerosol and guide it to clean the contaminants.

The present invention is an environmentally friendly clean production technology that can quickly and reliably remove foreign substances such as labels on the outer surface of glass bottles recovered for recycling as well as newly manufactured glass bottles, and residues and contaminants on the surface. It relates to a glass bottle cryogenic dry cleaning method and a system applying the.

Still another object of the present invention relates to a glass bottle cryogenic dry cleaning method and a system for applying an environmentally friendly clean production technology which enables the glass bottle dry cleaning which combines the incineration and wet cleaning of the glass bottle to complement each other.

According to the present invention, a glass bottle cryogenic dry cleaning method using cryogenic carbon dioxide includes cryogenic hard dry ice cleaning by CO ₂ pellet injection, cryogenic soft dry ice cleaning by CO ₂ aerosol streaming, cryogenic hard dry ice cleaning and soft dry ice cleaning. In parallel, hybrid cleaning may be a wet cleaning, or atmospheric burning and CO ₂ dry ice cleaning may be performed simultaneously.

This glass bottle cryogenic dry cleaning method is applied to a device where the dry ice dry cleaning device is simply changed in structure to suit one or more hard dry ice cleaning methods and hybrid cleaning as needed. Constructed by

In other words, the glass bottle cryogenic dry cleaning method first generates CO ₂ dry ice and is produced as a pellet or solid CO ₂ snow, respectively or simultaneously, CO ₂ pellets are buffered and CO ₂ snow is compressed to clean the cleaning article. It is kept in the waiting state for cleaning. It can then be mixed with cryogenic compressed air from the outside in a dry ice drum to form a cryogenic CO ₂ aerosol and, if necessary, via a separate heat exchanger and mixed with a predetermined cryogenic nitrogen or argon to form a CO ₂ snow aerosol. Then, the glass bottle to be cleaned is subjected to the first cleaning process and the second cleaning process. In this cleaning process, only the cryogenic hard dry ice cleaning process may be applied, or only the cryogenic soft dry ice cleaning process by CO ₂ aerosol trimming may be applied, or the cryogenic hard dry ice cleaning and soft dry ice cleaning may be performed in parallel. If necessary, hybrid cleaning process can be introduced to pretreatment by chemical wet cleaning or incineration to atmospheric pressure, and CO ₂ dry ice cleaning can be optionally performed by post treatment.

After this cleaning process, cryogenic hard dry ice cleaning, cryogenic soft dry ice cleaning by CO ₂ aerosol streaming, cryogenic hard dry ice cleaning and soft dry ice cleaning can be performed at the same time. After cleaning and use, residual CO ₂ dry ice is recovered and dust or debris is collected at the same time. Of course, all of this happens automatically.

The glass bottle cryogenic dry cleaning system includes a pellet maker for producing at least one CO ₂ dry ice and a pellet for solid dry ice, and a soft dry ice maker for producing soft dry ice for CO ₂ snow production; And at least one compressor comprising: a compressor for compressing the CO ₂ snow dry ice and a buffer for buffering the CO ₂ pellets; A dry ice drum which can be mixed with cryogenic compressed air from the outside to form a cryogenic CO ₂ aerosol, and is mixed with a predetermined cryogenic nitrogen or argon via a separate heat exchanger as needed to supply CO ₂ snow aerosol; It consists of dry cleaning devices that supply the glass bottle to be cleaned and perform the first cleaning process and the second cleaning process in sequence. This dry cleaning device uses only the cryogenic hard dry ice cleaning process to perform the cleaning process. Only cryogenic soft dry ice cleaning process by CO ₂ aerosol streaming can be applied, or cryogenic hard dry ice cleaning and soft dry ice cleaning can be performed simultaneously. Afterwards, CO ₂ dry ice cleaning may be optionally performed. Afterwards, the CO ₂ dry ice and dust or foreign substances remaining during the cleaning process are collected by the recovery unit.

The present invention will be described in detail with reference to the accompanying drawings. Figure 2 is a flow chart showing the step of performing the cryogenic hard dry ice cleaning in accordance with the present invention, Figure 3 is a block diagram showing a system for performing the cryogenic hard dry ice cleaning in accordance with the present invention step by step, Figure 4 5 is a cross-sectional view showing a cryogenic dry cleaning apparatus according to the present invention, and FIG. 5 is a schematic view showing a state of cleaning by each dry ice cleaning region of FIG. 4.

Example 1 Cryogenic Hard-Dry Ice Cleaning by CO ₂ Pellet Injection

2 and 3, the liquid CO ₂ is stored in the storage tank 1 in step S1 for dry cleaning the glass bottle using cryogenic hard drive ice. The CO ₂ fluid is supplied from the storage tank 1, and the pellets, which are solid dry ice, are formed by the CO ₂ hard dry ice maker ₂ while the step S2 is performed to form the CO ₂ dry ice. . This CO ₂ pellet is supplied to the buffer 3 and buffered in step S3 to be in an effective transport state. Subsequently, in step S4, dry ice buffered to form a cryogenic CO ₂ aerosol is supplied to the drum 4, and the drum 4 is generated by an external compressed air generator 5 in step S5. It is mixed with cryogenic compressed air to form cryogenic CO ₂ hard dry ice aerosol. Then, the glass bottle to be cleaned is subjected to the first washing process and the second washing process. In these cleaning processes, cryogenic hard dry ice cleaning is performed. This cleaning is performed by the following glass bottle cleaning apparatus 10.

That is, as shown in FIG. 4, the recycled glass bottles 11 are transported by the supply conveyor device 20 to be supported and moved in a general manner and transferred to the cleaning conveyor device 30 in the cleaning area.

This cleaning conveyor apparatus 30 is divided into four zones according to the cleaning part of the glass bottle 11, for example, the 1st cleaning part 31 which wash | cleans the bottom of the outside of a glass bottle, and the fuselage of the outside of a glass bottle. The second cleaning part 32 for removing foreign matters such as a label and an adhesive used to adhere the label, the third cleaning part 33 for intensively cleaning the neck area, and the inside of the glass bottle 11. Fourth washing unit 34 for cleaning. Here, the glass bottle 11 is CO ₂ dry ice cleaning through the first cleaning step (S6) and the second cleaning step (S6), the first cleaning step (S6) is the first, second and first Mean washing performed in the third washing unit (31), (32) and (33), the second washing step (S7) means the washing performed in the fourth washing unit (34).

In this embodiment, while performing the first cleaning step (S6) and the second cleaning step (S7), the cleaning is performed only by the hard dry ice mixed with the compressed air in step (S4), to the drum (4) Compressed and stored hard drive ice is supplied to cleaning nozzles properly installed in each cleaning unit.

As shown in FIG. 5A, the dry cleaning device 10 is shown to have a rotary type applied thereto, but a straight type may be applied as necessary.

In the first cleaning unit 31, the glass bottle 11 is transported by the conveyor 41 in an open state, and at the same time, the lower part is exposed to the nozzle 42, and the bottom thereof is cleaned. 11) is located in a tunnel-type box 50 that forms an enclosed space to recover hard drive ice, allowing the floor to be cleaned during movement. Similarly, the glass bottles in which the nozzles 43, 44, 43 ', and 44' are also properly installed and fixed to the conveyor 41 in the second and third cleaning parts 31 and 32, respectively. The neck and the body of (11) are cleaned to remove foreign substances such as the label (12). As with the second and third cleaning parts 32 and 33, as in the first cleaning part 31, the glass bottle 11 is located in the tunnel-type boxes 51 and 52, if necessary. While the body and the neck is cleaned during the removal of foreign matter on the outside to complete the first cleaning step (S6).

The cleaning performed at this time uses energy by physical injection, and the pellet type hard dry ice (Solid CO ₂ ) injected at high speed by high pressure (low pressure) air collides with the outer surface of the glass bottle 11. The hard dry ice rapidly freezes foreign matter on the surface of the glass bottle at very low temperatures (-78.7 ° C), which causes many cracks as the foreign material shrinks due to temperature differences. Dry ice, which penetrates between the foreign substances through these cracks, dissolves organic contaminants and expands more than 800 times in volume while being sublimated to lift only the foreign substances.

Subsequently, the second cleaning step S7 is fixed to the support 53 by the pick-up device (not shown) with the glass bottle 11 in the fourth cleaning part 34 as shown in FIG. 6A. Otherwise, the vial 11 is fixed to the support 53 in an inverted state by a pickup device (not shown).

The glass bottle 11 fixed in this way is fixed to the filling valve 47 through which the dry ice supply pipe 46 having the nozzle 45 at its inlet is fixed. The filling valve 47 is sealedly coupled to the inlet of the glass bottle 11, and has dry ice introduced into the glass bottle 11 having a through hole 48 that is larger than the diameter of the supply pipe 46 and is the same as the inlet. And a cavity 49 is formed to recover the foreign matter.

Therefore, the pellet-type hard dry ice placed in the fourth cleaning part 34 is introduced into the glass bottle 11 at high pressure, sprayed, and expanded while sublimated to discharge dry ice and foreign matter through the recovery pipe 46 '. At the same time, the automatic suction is made from the outside. Since the second cleaning is completed, the glass bottle 11 is further moved and transferred to the recovery conveyor device 60, so that all cleaning processes are completed and inspected and recovered in step S8.

On the other hand, dry ice, foreign matter and dust generated during the first and second cleaning steps (S6) and (S7) are collected in step S9 and only sublimated gaseous CO ₂ in step S10. Allow for separate recovery and storage.

In this way, if the cleaning process is applied only to the pellet-type hard dry ice, it is possible to remove not only the label and contaminants attached to the bottle surface but also organic contamination such as oil and stains.

Pellet-type hard dry ice is separated together with the removed foreign material and then vaporized with CO ₂ to enable dry cleaning and eco-friendly clean production technology without the need for post-treatment.

In addition, it may be replaced by a solid (Solid H ₂ O) (Ice), solid argon (Solid Argon), solid nitrogen (Solid N ₂ ) as a substitute depending on the cleaning vessel.

In addition, by applying the system of the present invention it is possible to wash even in the on-line state of the flow process and improve the productivity and there is no side effect such as abrasion, scratches, corrosion, etc. of the glass bottle surface to be cleaned object on the container quality There is no problem at all, and especially when cleaning the inner surface of the container, it produces synergy effect of thermal shock, so that △ T makes -100 ℃ ~ -120 ℃ instant cryogenic state, which makes it possible to remove microorganisms completely. It provides good hygiene conditions for the quality control of alcoholic beverages and food and beverages where control is important.

Example 2 Soft Dry Ice Cleaning by Cryogenic Dry Ice Aerosol Streaming

Soft dry ice cleaning uses a kind of aerosol dry ice, also known as snow cleaning.

This method can also be applied to the hard dry ice cleaning system described above and cleans the glass bottles by the principles and features of snow cleaning, ie soft dry ice cleaning.

As shown in FIG. 2, dry ice snow is generated in step S11. The method utilizes a commercially available CO ₂ cylinder stored at room temperature, which is filled with liquid CO ₂ and has a gas pressure of about 800 psi (54 atm) above the liquid. The enthalpy of CO _{2 in} the cylinder has _two liquid-gas phases at about 800 psi (54 atm) pressure.

When gas is used as the source, droplets nucleate and the percentage of liquid increases as the pressure decreases in the orifice.

Near 80 psi (5.4 atm), the interface between the liquid-gas region and the gas-solid region, all liquids are converted to solids. Here about 6% of the initial gas volume is converted to dry ice.

When a liquid is used as the source, as the pressure decreases in the orifice, bubbles form and the percentage of gas increases until it meets the gas-solid boundary. The remaining liquid is converted to solids, and about 45% of the high pressure CO ₂ is converted to dry ice.

As such, the production of snow is thermodynamically dependent on the movement of CO ₂ through the orifice, and the percentage of production of snow depends on the selected feed phase and is influenced by the pressure and temperature of the source. Each supply type has advantages and disadvantages.

In general, the gas supply system is of higher purity because gas is easier to filter than liquid. In addition, the consumption of pollutants such as bicarbonate and CO ₂ consumption is low. The liquid supply system produces more snow, which has the advantage of quicker cleaning while high consumption rate. As such, snow cleaning may be performed using liquid or gaseous CO ₂ as a source.

In the next step S12, the CO ₂ snow dry ice maker 7 receives and compresses the snow dry ice from the snow maker 6 as shown in FIG. 3 to maintain the optimum pressure for snow cleaning. This compressed dry ice is supplied to the dry ice drum 4 shown in FIG. 3 to produce cryogenic aerosols (step S4). To this end, in step S4, the compressed dry ice is replaced with compressed air for cleaning hard dry ice from the outside instead of carbon oxide, nitric oxide, ammonia, krypton, argon, methane, ethane, propane, butane, pentane and nucleic acid. From ethylene, propylene, Tetrafluosomethane, Chlodifluouimethane, Sulfurhaxafluoride, Perfluoropropane, and one or more substances, including but not limited to mixtures thereof It is mixed with any one or more of the substances that occur but are not food hygienic and economical.

Therefore, the glass bottles 11 are transported by the supply conveyor device 20 and transferred to the cleaning conveyor device 30 in the cleaning area.

The cleaning conveyor apparatus 30 is configured to clean the first cleaning part 31, the second cleaning part 32, the third cleaning part 33 and the fourth cleaning part 34 according to the cleaning part of the glass bottle 11. Pass in turn. That is, the glass bottle 11 is cleaned of snow dry ice through the first cleaning step S6 and the second cleaning step S6.

In this embodiment, while performing the first cleaning step (S6) and the second cleaning step (S7), the cleaning is performed only by the snow dry ice mixed with a predetermined material in step S4, the drum (4) The compressed and stored soft dry ice is supplied to cleaning nozzles properly installed in each cleaning unit. The nozzles are of a suitable configuration for soft dry ice with conical outlets, and the soft dry ice expands as it passes through the nozzle and rapidly moves to cryogenic temperatures formed of solid carbon dioxide particles (hereinafter referred to as carbon dioxide snow) and gaseous carbon dioxide. Form an aerosol stream.

Therefore, the vial 11 passes through the first cleaning step S6 and the second cleaning step S7 which are cleaned by this cryogenic aerosol stream. That is, as shown in Fig. 5A, the bottom of the glass bottle 11 is cleaned in the first cleaning part 31, and the glass bottle 11 forms a tunnel in which a closed space is formed to recover hard dry ice, if necessary. It is located in a box 50 of the type to allow the floor to be cleaned during movement. Similarly, as shown in Figs. 5B and 5C, the nozzles 43, 44, 43 ', and 44' are also properly installed in the second and third washing parts 31 and 32, so that the conveyor The neck and the body of the glass bottle 11 fixedly transported to the 41 are cleaned to remove foreign substances such as the label 12. As with the second and third cleaning parts 32 and 33, as in the first cleaning part 31, the glass bottle 11 is located in the tunnel-type boxes 51 and 52, if necessary. While the body and the neck is cleaned during the removal of foreign matter on the outside to complete the first cleaning step (S6).

In this cleaning, since the snow aerosol stream passing through the nozzles is sprayed onto the surface of the vial 11, foreign matters and contaminants on the surface of the container are removed by dry ice snow particle collision in the stream.

Subsequently, in the second cleaning step S7, as shown in FIG. 6A, in the fourth cleaning unit 34, the glass bottle 11 is attached to the support 53 in a normal state or inverted state by a pickup device (not shown). It is fixed.

The glass bottle 11 fixed in this way has a fill valve 47 having a soft dry ice supply pipe 46 at its inlet and a nozzle 46 fixed at its end. The filling valve 47 has the same through hole 48 and the cavity 49 as the inlet of the glass bottle 11 so that the nozzle 46 is positioned inside the glass bottle 11, and the nozzle 46 is opened. When the injected snow aerosol stream is injected through to collect the foreign matter through the recovery pipe 46 '.

Therefore, when the snow aerosol stream is injected at a high pressure through the nozzle 46 into the glass bottle 11 positioned in the fourth cleaning unit 34, it expands to discharge foreign substances and at the same time, the automatic suction is performed from the outside. That is, in this case, the cryogenic snow aerosol stream is injected into the contaminant in the vial 11 to cause a complex vortex with the contaminant that is reflected and removed to exit the vial 11. After the second cleaning is completed, the glass bottle 11 is further moved and delivered to the recovery conveyor device 60, so that all cleaning processes are completed and visually inspected and recovered in step S8.

On the other hand, sublimable CO ₂ gas, dry ice, foreign matter and dust generated during the first and second cleaning steps S6 and S7 are sublimed in step S9 and in step S10. Only recovered gaseous CO _{2 should} be recovered and stored.

On the other hand, when using this process, during the decontamination treatment by cryogenic aerosols, the cryogenic aerosol stream can cool part of the glass bottle due to the heat loss due to interaction with the vial surface.

Such cooling can condense moisture, and sufficient temperature must be provided to prevent substantially condensation of the moisture. The localized heat source for this may be a radiant heat source, for example a lamp or a heated filament, or may be a stream of hot air, such as dry air or nitrogen. The use of localized heat sources does not interfere with the removal of contaminants and can be prevented by substantially condensing moisture, such as by adjusting the ambient humidity with an environmental control system.

By using this arrangement, snow dry cleaning can effectively remove both contaminants and organics.

The removal of residues, such as organics and contaminants, from the surface during snow dry ice cleaning can be explained by two different mechanisms.

That is, the removal of contaminant particles and the removal of organic contaminants.

Removal of contaminant particles involves the combination of forces associated with moving high velocity gas and the transfer of momentum between surface contaminants and snow dry ice particles.

In general, removal of organic contaminants requires the presence of liquid CO ₂ during the collision.

Cryogenic aerosols, that is, snow dry ice, are used to remove organic contaminant membranes and contaminant particles in the separation phase.

Furthermore, the removal of the thin film or the harder contaminant film is considered to be a matter of how much snow dry ice particles are grown, and thus the cleaning power difference with the pellet type hard dry ice cleaning may be overcome.

The advantage of this cryogenic aerosol dry ice CO ₂ is that it does not use harmful chemicals like other dry ice CO ₂ dry cleaning methods, thus reducing the cost of the cleaning agent and generating no waste other than the removed pollutants. There are no hazards or safety problems for users, and the cleaning speed is faster than chemical cleaning.

Example 3 Simultaneous Cryogenic Hard and Soft Dry Ice Cleaning

The outer surface and inner cleaning of the glass bottle to be cleaned can be performed by using the pellet type cryogenic dry ice spray and the cryogenic snow dry ice aerosol stream (or snow blasting) in parallel. These methods can be cross-linked depending on product characteristics and shape, and also on labeling or bonding of contaminants on internal and external surfaces.

For example, the glass bottle 11 may be replaced with the first, second and third cleaning parts 31, 32, and 33 of the cleaning device 10 for cleaning the pellet-type hard dry ice that can be sprayed at a high pressure. Since the first cleaning step (S6) is performed by passing through, the label is firmly attached to the outer surface of the glass bottle 11 and is used to remove the contaminants and the glass bottle 11 via the fourth cleaning unit 34. The internal surface of the can be cleaned by using the Snow Dry Ice Aerosol Streaming injection system which is technically easy to control. Of course, these two methods could be used interchangeably.

It is noted here that the pellet-type hard dry ice produced through steps S2 and S3 and the compressed snow dry ice or soft dry ice produced through steps S11 and S12 are identical drums 4. ) Is not supplied. In addition, in step S4, instead of sharing the drum, the pellet-type hard drive ice may be mixed with a separate compressed air in a separate drum, and the compressed snow dry ice or soft dry ice may also use other drums such as nitrogen. It is mixed with certain materials to produce cryogenic snow dry aerosols.

Example 4 Hybrid Cleaning: Chemowet Cleaning and CO ₂ Dry Ice Cleaning

In the cleaning of liquor and food glass bottles, most of the returnable bottles recovered using rinsers or glass bottle washers are wet-washed with chemicals.

Glass bottle washers vary according to type and type, but in the first stage of preliminary washing, the glass bottles are cleaned externally with contaminants and foreign substances, and the second stage is the deposition step, which is suitable for chemical bottles such as sodium hydroxide (NaOH). Deposition and contaminants are decomposed by time immersion, the inside and the outside of the glass bottle are cleaned in the three stages of washing, and the final stage of the stage is washed with clean water.

`` Recently, glass bottle cleaners have excellent cleaning ability, but in the case of some malignant diseases (recovered bottles with severe contamination status), incomplete cleaning due to chemical wet cleaning ability limits and chemical compositional balance of operation may be broken. When a large amount of bad cleaning occurs, it has a big impact on the quality.

Hybrid cleaning of the present embodiment to solve this drawback is to clean the label and the inside and the outer surface of the container in the case of recovered glass bottles by the above-described chemical wet cleaning as a pre-treatment, hygienic cleaning to overcome the incomplete cleaning of malignant disease This can be done by CO ₂ dry ice cleaning. In this case, any one of the first, second and third embodiments of the present invention can be selected and used.

In other words, such cleaning is first, after the normal cleaning by the conventional glass bottle washer after the CO ₂ dry ice cleaning according to the present invention as a post-treatment, and second, to perform the final four stages of the conventional glass bottle washing Instead, the method for installing the CO ₂ dry ice cleaning system according to the present invention in the cleaning area and the third step of the glass bottle to perform the cleaning step of the CO ₂ dry ice cleaning system using only the steps 1 and 4 of the glass bottle washer. CO ₂ cleaning is achieved.

Example 5 Another Example of Hybrid Cleaning: Atmospheric Pressure Incineration and CO ₂ Dry Ice Cleaning

Dry cleaning, such as known atmospheric pressure incineration, is not currently employed as a method for cleaning alcoholic beverages and glass containers, but may be a cleaning method that can be used in the future recycling of bottles.

Atmospheric pressure incineration may be more useful for disposable glass bottles than for recovered glass bottles, and is applied to cleaning glass bottles that cannot be wet-wet cleaned by labeling use of poorly soluble adhesives. It is a cleaning method that incinerates labels and burns organic contaminants by electric heating method within a range not provided.

This hybrid cleaning is applied to not only glass bottles that are recovered but also disposable glass bottles that are disposed of, so that all contaminants and foreign substances are first incinerated by dry cleaning with electric heat, and the foreign substances that could not be completely removed by incomplete combustion, etc. in this cleaning are removed. The first, second and third embodiments according to the present invention can be introduced into the post-treatment process. Therefore, dry cleaning is pretreated by thermal incineration and CO ₂ dry ice cleaning is post-treated to achieve complete cleaning.

At this time, the CO ₂ dry ice cleaning is achieved by the cleaning system according to the present invention, and the pellet type hard dry ice cleaning and / or cryogenic snow aerosol spraying method of soft dry ice may be applied.

The present invention constituted as described above has achieved the environmentally friendly technology, the structure to re-collect the cleaning medium to recycle the glass bottle in the inside, the foreign matter such as the label on the outer surface of the glass bottle and the residue and surface inside This allows for quick and reliable removal of contaminants from the bed.

Claims (8)

In the glass bottle cryogenic dry cleaning method, CO ₂ dry ice is produced to produce pellets, which are solid dry ice, and CO ₂ snow dry ice individually or simultaneously, Buffer the CO ₂ pellets, compress the CO ₂ snow to an atmospheric cleaning state, Compressed mixture, which is mixed with cryogenic compressed air from the outside in a dry ice drum to form a cryogenic CO ₂ aerosol, and mixed with a predetermined cryogenic nitrogen or argon to produce either of the CO ₂ snow aerosols , The glass bottle to be cleaned is first washed and secondly cleaned by spraying cryogenic hard dry ice, A glass bottle cryogenic dry cleaning method comprising the steps of recovering CO ₂ dry ice and collecting dust or debris at the same time. The method of claim 1, Glass bottle cryogenic dry cleaning method in which primary and secondary cleaning are performed only by cryogenic soft dry ice spraying by CO ₂ aerosol streaming The method of claim 1, A glass bottle cryogenic dry cleaning method in which the first and second cleaning is performed by selectively performing cryogenic hard dry ice cleaning and soft dry ice spray. According to claim 1, A glass bottle cryogenic dry cleaning method in which glass bottle cleaning is performed by chemical wet method in pretreatment and CO ₂ dry ice spraying in post treatment. The method of claim 1, A glass bottle cryogenic dry cleaning method in which glass bottle cleaning is carried out by atmospheric incineration as a pretreatment, and CO ₂ dry ice spraying is performed in a post treatment. In the glass bottle cryogenic dry cleaning system, A pellet maker producing at least one CO ₂ dry ice to produce pellets as solid dry ice; A buffer for buffering the CO ₂ pellets following this pellet maker; A drum capable of mixing with cryogenic compressed air from the outside to form a cryogenic CO ₂ aerosol; A dry cleaning apparatus supplied with a glass bottle to be cleaned to sequentially perform the first cleaning process and the second cleaning process: CO ₂ dry ice, and dirt or foreign objects that are composed of glass bottles recovery / collection device for recovering by collecting the cryogenic dry cleaning system. The method of claim 6, Soft dry ice maker that produces soft dry ice for CO ₂ snow production, and a compressor that compresses CO ₂ snow dry ice and a mixture of special cryogenic nitrogen or argon to produce CO ₂ snow aerosol through a separate heat exchanger. A glass bottle cryogenic dry cleaning system that further includes other dry ice drums. The method of claim 6, The dry cleaning apparatus has first, second and third tax governments carrying out the first cleaning stage and the fourth tax government carrying out the second washing stage, and each of the first, second and third tax governments has the advantage. A glass bottle cryogenic dry cleaning system with nozzles for spraying CO ₂ dry ice on the bottom, neck and body of the bottle and a sealed box to recover dry ice, contaminants and labels.

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