GB2261364A - Method of cleaning containers - Google Patents
Method of cleaning containers Download PDFInfo
- Publication number
- GB2261364A GB2261364A GB9124186A GB9124186A GB2261364A GB 2261364 A GB2261364 A GB 2261364A GB 9124186 A GB9124186 A GB 9124186A GB 9124186 A GB9124186 A GB 9124186A GB 2261364 A GB2261364 A GB 2261364A
- Authority
- GB
- United Kingdom
- Prior art keywords
- container
- carbon dioxide
- liquid carbon
- interior
- cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0021—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by liquid gases or supercritical fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Nozzles (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The interior of a compressed gas cylinder 5 is cleaned by passing clean liquid carbon dioxide under pressure from a source tank 1 through nozzles 4' in a spray nozzle lance 4 located within the interior of the cylinder. The gas cylinder 5 is initially pressurised by liquid nitrogen via line 13. The contaminated liquid carbon dioxide is collected at tank 7. <IMAGE>
Description
METHODS OF CLEANING CONTAINERS
The present invention relates to methods of cleaning the interior surface(s) of containers, for example, the interior surface(s) of cylinders which in use contain industrial, medical or other gases under pressure.
Currently, gas cylinders are cleaned by flushing them with hot deionised water and a solvent such as FREON (Registered Trade Mark). This known method of cleaning gas cylinders suffers from the following disadvantages: a) The method is relatively expensive; FREON is an expensive solvent; b) the solvent should it escape is claimed to be damaging to the
environment; and c) introducing hot de-ionised water into the cylinder necessitates a
drying step.
It is an aim of the present invention to provide a method of cleaning the interior surface(s) of a container using clean liquid carbon dioxide under pressure.
According to the present invention, a method of cleaning the interior surface(s) of a container comprises passing clean liquid carbon dioxide under pressure through at least one nozzle located within the container.
An embodiment of the invention will now be described by way of example, reference being made to the Figure of the accompanying diagrammatic drawing which is a schematic diagram of an apparatus for use in cleaning the interior of a container.
As shown, a line 10 extends initially from a source tank 1 of liquid carbon dioxide to a pump 2 and a filter 3. From the filter 3 the line 10 joins a line 12 which is connected at its upper (as shown) end with the lower (as shown) end of a spray nozzle lance 4. The spray nozzle lance 4 is located within the interior of a container in the form of a compressed gas cylinder 5 and has a plurality of space nozzles 4' which extend along substantially the full length of the interior of the cylinder 5.
At its lower (as shown) end line 12 is connected to a line 13 in which is located a control valve 14.
Extending from the lower (as shown) end of the cylinder 5 is a further line 16 which communicates with a receiving tank 7. A pressure control device 6 is located within the line 16.
In use, initially the pressure within the cylinder is brought to about 40 bar by the slow introduction of nitrogen via line 13, valve 14, line 12 and the spray nozzle lance 4. The pressurisation of the cylinder 5 is intended to inhibit coating effects and the formation of dry ice.
Next, clean liquid carbon dioxide from tank 1 is pressurised by pump 2 and then passes through the filter 3 which removes any particulate material.
The filtered liquid carbon dioxide under pressure then passes into the spray nozzle lance 4 via the line 12 and is sprayed through the nozzles 4' to achieve a uniform liquid spray. The liquid spray velocity and the solvent properties of the liquid carbon dioxide remove impurities from the internal surface(s) of the cylinder 5.
Contaminated liquid carbon dioxide leaves the interior of the cylinder 5 via line 16 and is received within the tank 7 for recycling.
Although reference has been made throughout the above described embodiment to a compressed gas cylinder clearly the method described would be suitable for cleaning the interior of any container which may be contaminated by oil or particulate materials.
A particular advantage of the above described method is that any leakage of carbon dioxide will have minimal effect on the environment when compared to the solvents and other cleaning materials currently used for cleaning compressed gas cylinders.
Claims (6)
1. A method of cleaning the interior surface(s) of a container
comprising passing clean liquid carbon dioxide under pressure through
at least one nozzle located within the container.
2. A method as claimed in Claim 1, in which the clean liquid carbon
dioxide from a source is first pressurised and then passed through a
filter to remove particulate material therefrom prior to its passage
through the or each nozzle.
3. A method as claimed in Claim 1 or 2, in which a plurality of nozzles
are located within the container, said nozzles being spaced apart and
extending substantially along the full length of the container.
4. A method as claimed in any one of Claims 1 to 3, in which the
interior of the container is slowly pressurised to approximately 40
bar to inhibit coating effects and the formation of dry ice prior to
the introduction of the clean liquid carbon dioxide.
5. A method as claimed in any one of Claims 1 to 4, in which after
passage through the or each nozzle liquid carbon dioxide is withdrawn
from the container and collected for reprocessing.
6. A method of cleaning the interior of a container substantially as
hereinbefore described.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9124186A GB2261364B (en) | 1991-11-14 | 1991-11-14 | Methods of cleaning containers |
| AU27333/92A AU2733392A (en) | 1991-11-14 | 1992-10-26 | Methods of cleaning containers |
| JP4295729A JPH05293456A (en) | 1991-11-14 | 1992-11-05 | Method for cleaning container |
| ZA928737A ZA928737B (en) | 1991-11-14 | 1992-11-12 | Methods of cleaning containers |
| CA002082837A CA2082837A1 (en) | 1991-11-14 | 1992-11-13 | Methods of cleaning containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9124186A GB2261364B (en) | 1991-11-14 | 1991-11-14 | Methods of cleaning containers |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9124186D0 GB9124186D0 (en) | 1992-01-08 |
| GB2261364A true GB2261364A (en) | 1993-05-19 |
| GB2261364B GB2261364B (en) | 1995-04-19 |
Family
ID=10704616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9124186A Expired - Fee Related GB2261364B (en) | 1991-11-14 | 1991-11-14 | Methods of cleaning containers |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH05293456A (en) |
| AU (1) | AU2733392A (en) |
| CA (1) | CA2082837A1 (en) |
| GB (1) | GB2261364B (en) |
| ZA (1) | ZA928737B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2358791A (en) * | 2000-02-04 | 2001-08-08 | Versar Inc | Method composition and apparatus for cleaning internal surfaces of oxygen converters and cylinders |
| US6450182B2 (en) | 2000-04-12 | 2002-09-17 | Versar, Inc. | Methods, compositions and apparatus for cleaning pipes |
| DE10160902A1 (en) * | 2001-12-12 | 2003-07-03 | Messer Griesheim Gmbh | Highpressure cleaning by deepcooled gas has gas source and highpressure pump and iced particles admixer and cleaning and directing nozzle to spray jet effectively onto metal glass plastics or ceramics objects. |
| GB2393385A (en) * | 2002-08-08 | 2004-03-31 | Messer Uk Ltd | Flushing and filling gas cylinders |
| GB2408925A (en) * | 2003-12-13 | 2005-06-15 | Covelec Ltd | Cleaning and drying apparatus for flavouring drums |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5303837A (en) * | 1991-03-05 | 1994-04-19 | Portola Packaging, Inc. | One-piece fitment and plug with tamper-evident band |
-
1991
- 1991-11-14 GB GB9124186A patent/GB2261364B/en not_active Expired - Fee Related
-
1992
- 1992-10-26 AU AU27333/92A patent/AU2733392A/en not_active Abandoned
- 1992-11-05 JP JP4295729A patent/JPH05293456A/en active Pending
- 1992-11-12 ZA ZA928737A patent/ZA928737B/en unknown
- 1992-11-13 CA CA002082837A patent/CA2082837A1/en not_active Abandoned
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2358791A (en) * | 2000-02-04 | 2001-08-08 | Versar Inc | Method composition and apparatus for cleaning internal surfaces of oxygen converters and cylinders |
| US6676768B2 (en) | 2000-02-04 | 2004-01-13 | Versar, Inc. | Methods, compositions and apparatus for cleaning surfaces |
| US6450182B2 (en) | 2000-04-12 | 2002-09-17 | Versar, Inc. | Methods, compositions and apparatus for cleaning pipes |
| US6823879B2 (en) | 2000-04-12 | 2004-11-30 | Versar, Inc. | Apparatus for cleaning pipes |
| DE10160902A1 (en) * | 2001-12-12 | 2003-07-03 | Messer Griesheim Gmbh | Highpressure cleaning by deepcooled gas has gas source and highpressure pump and iced particles admixer and cleaning and directing nozzle to spray jet effectively onto metal glass plastics or ceramics objects. |
| GB2393385A (en) * | 2002-08-08 | 2004-03-31 | Messer Uk Ltd | Flushing and filling gas cylinders |
| GB2408925A (en) * | 2003-12-13 | 2005-06-15 | Covelec Ltd | Cleaning and drying apparatus for flavouring drums |
| GB2408925B (en) * | 2003-12-13 | 2006-02-22 | Covelec Ltd | Cleaning and drying apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05293456A (en) | 1993-11-09 |
| ZA928737B (en) | 1993-07-28 |
| GB9124186D0 (en) | 1992-01-08 |
| AU2733392A (en) | 1993-05-20 |
| GB2261364B (en) | 1995-04-19 |
| CA2082837A1 (en) | 1993-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19991114 |