Handbook of Solvents - George Wypych - ChemTech - Ventech!

21.4 Alternative cleaning technologies 1501
Figure 21.4.1. Miele System Kreussler washing machine
and dryer.
21.4.2 WET CLEANING
The new technique results from intensive research
work of Kreussler. The processing
methods and in particular their translation
into production-ready machine technology
was developed in co-operation of Kreussler
with Miele of Gütersloh.
What does this new textile cleaning
system look like, what prospects does it offer,
what are its limitations and how it can be
integrated into the practical operations of a
textile cleaning company?
21.4.2.1 Kreussler textile cleaning
system
For achieving drycleaning with water it is essential to use a washing machine with at least
80 cm drum diameter, centrifugal acceleration of 0.9 g-force in the wash cycle and 450
g-force during spinning (at least 1000 rpm), appropriate drum and lifter rib design, and accurate
regulation of temperature and liquor flow, as well as precise control of mechanical
action and dosing.
Also necessary is a large-capacity tumble dryer, with drum at least 100 cm in diameter,
having precisely controlled centrifugal acceleration; horizontally directed air flow, parallel
to the drum axle; and precision electronics to regulate temperature and residual moisture
level.
These requirements, comprising washer-extractor and tumble dryer together with
other important know-how, are provided by the “Miele System Kreussler”.
Miele System Kreussler
The washer-extractor (Miele WS 5220 TR), with a drum volume of 220 litres, has a loading
capacity of 8-10 kg for delicate outerwear, 12-15 kg of ordinary outerwear and 20-22 kg of
normal textiles designated washable by the care label. The special outerwear cleaning is
carried out using the LANADOL process, for which approx. 140 litres of water are used per
load. Cycle time is about 25 minutes.
The dryer (Miele 6559 TR) has a drum diameter of 110 cm, with a 550 litre volume.
The drying air flows through the load horizontally - parallel to the drum axle - from the rear
towards the door, thus achieving optimum evaporation level with a short drying time. The
necessary temperature progression and precise residual moisture is ensured with precision
electronics.
A significant aspect is that not only the LANADOL process but all other wash programs
can be carried out in the Miele System Kreussler machines, providing comprehensive
textile cleaning facilities.
LANADOL processing technique
Most textiles offered to drycleaners for processing can be handled with three basic processes:
• Extra: Garments without wash symbol
• Normal: Garments with 30/40°C wash symbol
• Proofing: Poplin and sportswear