Automatic success.
CO2 blast cleaning with CRYOCLEAN®snow. ® ® 02 CO2 blast cleaning with CRYOCLEAN snow CO2 blast cleaning with CRYOCLEAN snow 03
Compressed air Snow magic with CRYOCLEAN®snow. Fully automated surface cleaning. Liquid CO2 (LIC) Nozzle movement
CRYOCLEAN®snow is based on a funda- mentally new functional principle. By
feeding liquid CO2 (LIC) into a specially designed device, particularly solid snow particles are produced and “shot” imme- CO2 snow particles diately onto the surface with compressed Compressed air air. The system is designed for medium- Low velocity power cleaning processes and a layer thickness up to approximately 1 mm. Low velocity Object with soiled surface
Over the years, CO2 blast cleaning has been The proven benefits of CRYOCLEAN® Recommended applications
established as a standard method in various CRYOCLEAN®snow is similar to conventional CO2 blast cleaning CRYOCLEAN®snow can be integrated into the production process and offers areas of industrial cleaning. In addition to when it comes to efficiency and eco-friendliness: the perfect solution for the full automation of cleaning processes, such as →→ The cleaned surfaces have a particularly high quality. for example: blast cleaning with dry ice pellets, BOC offers →→ As the CO2 snow sublimates directly after use, there are →→ Surface pretreatment for lacquering, coating, gluing, etc. no cleaning agent residues left. →→ Surface cleaning before and after welding an attractive fully automated alternative →→ The safety of the workplace is enhanced as no harmful →→ Mould cleaning in various production processes with dry ice snow: CRYOCLEAN®snow. This solvents are used. →→ Surface cleaning in the electronic and semiconductor industry →→ Several square metres can be cleaned per minute. blasting system produces CO2 snow particles
directly on demand from a liquid CO2 supply. Benefits of CRYOCLEAN®snow Even though it is less aggressive than In contrast to conventional CO2 blast cleaning, CRYOCLEAN®snow does conventional processes, it is advantageous not require dry ice pellets, which has the following benefits: for many applications as it requires no →→ Clumped pellets will no longer cause malfunctions of the blasting unit. →→ No personnel are needed for the refilling of pellets or other tasks. handling of dry ice pellets and little →→ Purchase, storage and handling of pellets is not required. →→ As liquid CO2 (LIC) can be easily stored for long periods, the cleaning maintenance. power is immediately available.
CRYOCLEAN®, ICEBITZZZ®, ECO-SNOW®, SECCURA® and ACCURA® are registered trademarks of The Linde Group. ® ® 04 CO2 blast cleaning with CRYOCLEAN snow CO2 blast cleaning with CRYOCLEAN snow 05
CO2 state diagram 10,000
1,000
Solid CO2 Liquid CO2 (dry ice) (LIC)
100 Supercritical Critical point Triple point of
Pressure (bar) Pressure 10 carbon dioxide Operating parameters of LIC tanks Gaseous CO2 1 Sublimation point of dry ice 0.1 –100 –80 –60 –40 –20 0 20 40
Temperature (̊C)
A valuable product with unique abilities. Interesting facts about CO2.
CO2 is important for life Further examples of use of CO2 From CO2 snow to gas in no time flat
Life on earth would not be possible without carbon dioxide (CO2). In the guishers and freons (CFCs) in the production of polystyrene and polyure- →→ In carbonated drinks (longer shelf life) Liquid CO2 is stored either in cylinders at ambient temperature under continuous atmospheric cycle, it is released and absorbed over and over thane foams. These substances destroy the ozone layer in the stratosphere →→ For cooling or freezing of foodstuffs 60 bar pressure or in vacuum-insulated tanks at –20 °C under 20 bar pres- again – e. g. by processes such as photosynthesis. This keeps the green- and are therefore forbidden from use. In swimming pools, carbon dioxide →→ In greenhouses (increased growth rates) sure. When liquid CO2 expands, finely powdered snow is formed. When house effect at a constant level. The combustion of fossil fuels, however, instead of hydrochloric acid is used to neutralise the water. The risk of →→ For cleaning of drinking water energy is applied (e. g. heat or energy released by impact), the CO2 snow increases the amount of carbon dioxide, which disrupts the atmosphe- harmful chlorine gas being formed is thus reduced, enhancing the safety →→ For neutralisation of waste water is directly converted into its gaseous state without liquefying first. This ric cycle. This is the reason why many people associate carbon dioxide of swimmers and employees. →→ In industrial cooling processes process is called sublimation. with global warming and consider it negative overlooking its general →→ As shielding gas for MAG welding of steel importance. Hence, carbon dioxide opens up a wide variety of possibile applications →→ As blasting medium in CRYOCLEAN® dry ice blasting processes Further characteristics:
without harming the atmospheric cycle. →→ CO2 snow particles contain no water. Furthermore, carbon dioxide in the form of ICEBITZZZ® dry ice pellets and →→ Their temperature is –78 °C.
CO2 and the environment At BOC, we have extensive know-how when it comes to working with dry ice blocks is a highly efficient and flexible chilling agent, which keeps →→ Carbon dioxide is considered non-toxic. However, exposure limits must carbon dioxide. Handling this gas requires caution and a risk assessment goods cool and fresh without additional energy. be observed. Please consult your local BOC subsidiary for support.
Contrary to popular belief, the use of industrially produced CO2 does not should be conducted before using it. Please refer to the safety data sheet →→ It usually behaves like an inert substance. This means that there is no contribute to global warming as carbon dioxide can be recovered from pro- and safety instructions. BOC can support you with training in safe handling chemical reaction with its environment. duction residues and by-products of combustion and chemical processes and storage of this and other industrial gases. For further information, →→ It is also non-flammable. in the production of ammonia, alcohols and fertilisers. This carbon dioxide please call your local BOC office. would be released directly into the atmosphere if BOC did not “capture” it and turned it into a valuable product. The information contained in this document is provided as a general out- line and is not intended to be a definitive statement on any subject matter. In many applications, carbon dioxide replaces substances which have a Professional advice should be sought before any action is taken in relation negative impact on the environment – for example, halons in fire extin to safety in the workplace. ® ® 06 CO2 blast cleaning with CRYOCLEAN snow CO2 blast cleaning with CRYOCLEAN snow 07
Thanks to varying blasting geometries, it is possible to clean large and also Perfect preparation with CRYOCLEAN®snow. very small surfaces, either completely or partially, and coat them afterwards. Surface cleaning as lacquering pretreatment.
In order to meet ever increasing quality afterwards. In multiple-step pretreatment Among the many benefits of surface cleaning demands on laquered surfaces, manufactur- processes, mostly of plastics, the surface is with CRYOCLEAN®snow, the possibility of dry
ers rely more and more on an optimal surface initially cleaned with CRYOCLEAN®snow, then cleaning is the most notable. As the CO2 is dry pretreatment. With CRYOCLEAN®snow, they can treated with deionised air and subsequent- and does not leave any cleaning agent residues, now profit from an extremely reliable and effec- ly, before lacquering, the surface energy is time and energy-consuming drying processes tive process. increased. are not necessary after cleaning. This allows a very compact design of the lacquering system There are one-step and multiple-step pre- For lacquering with UV lacquers, it is advisable and results in reduced operating costs. Further- treatment processes. In one-step pretreat- to treat the surface with CRYOCLEAN®snow and more, complete units can be pretreated and lac- ment processes, the surface is cleaned with dry the lacquers under an inert atmosphere of quered in the assembled state.
CRYOCLEAN®snow and is lacquered directly CO2 with our inert gas technology.
® ® 08 CO2 blast cleaning with CRYOCLEAN snow CO2 blast cleaning with CRYOCLEAN snow 09
Pretreatment in joining processes Mould cleaning
Joining processes, such as welding, brazing and The cleaning of moulds in foundries with CO2 gluing, require that the surface is only pretreat blasting is considered standard by now. In recent
ed in the areas of the joint. years, CO2 snow blasting has been increasingly established in the automated cleaning process.
With CO2 snow blasting, we have succeeded in In polyurethane foaming, the CO2 needed developing a process that exactly meets this for the automated mould cleaning with requirement and limits the cleaning power to CRYOCLEAN®snow can also be utilised as a the surfaces to be joined. CRYOCLEAN®snow is foaming agent and as a carrier medium for equally successful in the removal of smoke and the application of the mould release agent. welding residues.
Successful utilisation. Further possible applications of CRYOCLEAN®snow. ® ® 10 CO2 blast cleaning with CRYOCLEAN snow CO2 blast cleaning with CRYOCLEAN snow 11
You can rely on our experience. Supply and delivery.
One needs experience to find optimal supply solutions for a variety of applications. Our application engineers provide this experience when they analyse the requirements of the customer and develop solutions which are exactly adapted to the respective manufacturing process and thus ensure process safety. With our services SECCURA® automatic gas supply and ACCURA® gas management, the gas supply can be monitored and controlled without any troubles. For this reason, supply shortage has become a problem of the past.
Pressure increase system CRYOCLEAN®snow CRYOCLEAN®snow
for liquid CO2 control unit blasting head SECCURA® automatic gas supply ACCURA® gas management
SECCURA® is the automatic gas supply on the ACCURA® is a service for the monitoring and basis of remote tank monitoring. By means of controlling of the liquid gas demand on the electronic sensors and a computer on the tank, basis of internet technology. Particularly in pressure and fill level are continuously deter- combination with SECCURA® automatic gas sup- mined, recorded and transferred electronically to ply, customers can easily track their latest tank the BOC Distribution Center. The dispatchers at levels, as well as user and delivery order data CRYOCLEAN®snow CRYOCLEAN®snow BOC immediately arrange the supply of the tank per tank and site, online at any time. Compre- control unit blasting head as soon as the fill level falls below a specified hensive statistics, comparisons between con- limit. sumption periods, and regular reports via e-mail support the analysis and planning of the gas System assembly CRYOCLEAN®snow demand.
www.boconline.co.uk [email protected] 111Fax 0800 555 111Tel 0800 333 Manchester M28 2UT Worsley, Road, Priestley Centre, Service Customer BOC For enquiries please contact: requirements. to local adapted resources and knowledge –world-leading BOC you. to benefits consistent and comprehensive way, deliver we this In suppliers. key with and authorities regulatory relevant with customers, –with partnerships through forged been has reputation BOC’s success. your to build helping you, with and you for We there are support. ofcustomer part integral an are optimisation productivity and process service, quality, whom for apartner need you market, today’s in competition ofthe To ahead keep clients. ofour requirements individual the meet to customised be can which support technical and services, and ofproducts range acomprehensive have we this To achieve profitability. greater hence and advantage competitive discernible clearly value, to added create customers our help we At BOC solutions. innovative and products quality high with customers our to provide ways new for looking constantly are we oftechnology, application the in aleader As services. and products related as well as gases, medical and specialist industrial, of provider UK’s largest the is BOC company. engineering and gases global leading the Group, Linde ofThe amember is BOC BOC –turning ideas into solutions members of The Linde Group, the parent company of which is Linde AG. Reproduction without permission is strictly prohibited. © BOC Limited 2015 Limited ©BOC prohibited. strictly is permission without Reproduction are AG. Linde Limited is Group which of BOC The company and parent Limited the BOC Group, Both Linde The of Limited. Group members BOC The of marks trade registered are BOC letters the Group. and Linde symbol The of stripe The trademarks registered are VIVANTOS® and ECOVAR® LASERLINE®, GENIE®, CRYOSPEED®, Tel 1483 +44 579 857, Fax 1483 +44 211, 505 www.BOConline.co.uk Kingdom United 7XY, GU2 Surrey Guildford, Park, Research Surrey The Road, 10 Centre, Priestley Priestley The BOC
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