As the constructor and manufacturer of cleaning and disinfection devices, we offer you foam-generating units of various capacity. Foam generated by our devices is intended to be used for cleaning and disinfection of machines and appliances in food industry as well as for maintaining hygiene of manufacture areas in meat plants, diaries, breweries, etc.

A foam generator comprises of pressure vessel made from acid-proof steel, placed on mobile trolley. Pouring hole is placed centrally on the top bottom from where two stubs are derived. They are connected with armature which supplies the vessel with condensed air from outer sources (for instance from compressor or condensed air network) and then brings out cleaning agent. Cleaning agent and condensed air generate foam.

Equipment:

• vessel on trolley of 20, 40 or 80l capacity
• standard lance with foam-generating nozzle
• cleaning dilution pipe of 10 m length
• condensed air pipe of 10 m length

Caution: longer pipes available optionally

Foam generator
of 80l capacity

Foam generator
of 40l capacity

Foam generator
of 20l capacity

FOAM CLEANING TECHNIQUE

Remaining residues in food plants can be nourishing for germs or other microorganisms and therefore the cause of biological infections. Manufacture areas can also be contaminated with toxic or harmful substances that are by-products of oxidation, hydrolysis or pyrolysis of food residues. This is what makes maintaining high hygiene standards so vital, whether it comes to devices or manufacture areas. The solution is to combine the machine and manual cleaning process with simultaneous disinfection.

In food industry plants foam cleaning technique is getting more and more significant nowadays. It combines cleaning process with simultaneous disinfection. To perform foam cleaning you necessarily need to use the following:

• cleaning agent intended for foam cleaning (cleaning-disinfectant or disinfectant only)
• foam generator
• access to condensed air and drinking water

FOAM CLEANING TECHNIQUE STEPS:

Step I
Rinsing the surfaces with drinking water under 30 atm pressure in order to remove thick or easy to clean dirt.
In case of heavy greasy dirt water of higher temperature is needed in order to melt grease (about 60^oC).
When rinsing versatile or slanted surfaces water jet should be directed downwards – pic. 1.

Step II
Foam should be applied evenly on the surface. The distance from lance's nozzle to cleaned surface should not be shorter than 0,5 m.
In case of versatile or slanted surfaces foam should be applied from bottom to the top – pic. 2.

Step III
Foam should be left on cleaned surfaces for 10 to 20 min.

Step IV
Rinsing the surfaces with drinking water under 5 to 30 atm pressure.
When rinsing versatile or slanted surfaces water jet should be directed downwards.

Pic.2 Motion of foam jet while applying on versatile or slanted surfaces (scheme)

Pic.1 Motion of water jet while rinsing (scheme)

HOW WATER TEMPERATURE AFFECTS EFFICIENCY OF FOAM CLEANING

Water temperature is one of the most significant factors affecting cleaning quality. The higher water temperature, the easier dirt removal process is.

Water temperature during foam cleaning process can be increased by:

• heating of the cleaned surfaces (for instance inner surfaces of smoking chambers, deep fryers, cauldrons, etc.)
• using heated water for initial rinsing and foam rinsing. In case of greasy dirt water temperature is recommended to be higher than necessary for melting grease (for instance in meat-processing plants it should be at least 60^oC)
• using heated and diluted cleaning agents (made from concentrate and heated water)

ADVANTAGES OF FOAM CLEANING TECHNIQUE:

Economy
By using 2 kg of concentrated cleaning agent, 48 dm³ of water and 450 dm³ of air, 500 dm³ of foam can be generated. Such quantity is sufficient to cover about 100 m² surface with foam layer that is 0,5 cm thick.

Ecology
Foam cleaning provides low consumption of cleaning agents and therefore low surfactants content in waste water.

Effectiveness and efficiency
Due to prolonged contact of cleaning agent (cleaning-disinfectant or disinfectant only) with dirt, foam cleaning is particularly efficient. It is clearly noticeable when cleaning versatile or slanted surfaces. Whilst liquids flow off fast, stable foam 'sticks' to the surface, gradually releasing cleaning dilution. Therefore cleaned surfaces are repeatedly being covered with cleaning dilution layer.

Precision
While foam cleaning process you can easily observe cleaned or rinsed surfaces so that you can make sure it is performed with the best possible care and precision.

No harmful mechanical action
Due to low pressure (4-6 atm) foam jet does not affect cleaned surfaces harmfully as it takes place during high pressure cleaning process.

Comfort of use
The recoil force of the lance is weaker in comparison with high-pressure cleaning technique therefore it is more comfortable in use. In addition, the level of noise generated while working is low.

Aerosols are hardly produced during foam cleaning process
of both cleaning agent and removed dirt. Aerosols are particularly produced during high pressure cleaning, then they spread uncontrollably and can be harmful to employees as well as manufacture installations. They can also lead to repeated infections and contamination. Foam cleaning technique is absolutely free from such hazard.

EXAMPLES OF USE:

• cleaning (combined with disinfection or disinfection only) of walls and ceilings in manufacture areas, stockrooms or livestock areas
• cleaning (combined with disinfection or disinfection only) of manufacture installations and devices, smoking chambers, deep fryers, belt or chain conveyors, etc.
• cleaning of buildings' elevation
• cleaning of means of transport (wagons, locomotives, cars, cisterns, etc.)
• degreasing of huge metal constructions before painting (containers, pipelines, openwork constructions, etc.)