Working of Can Washers

Though manufacturers may use special arrangement of treatment for getting effective can washing but certain operational activities as discussed below will result good cleaning:

•  Draining out milk or cream residue before feeding cans in the washing machine preferably over drip saver.
•  Rinse thoroughly with clean, cool water for removing the loosely adhered milk/milk solids layer (Fig. Tank-A).
•  Use warm and high velocity/turbulent detergent water/solution to loose and dislodge materials adhered to the can (Fig. Tank-B). Drain the solution after an effective period.
•  Rinse with clean warm/cool water by circulation for.desired period (Fig. Tank-C), and/or
•  Follow by a clean, hot rinse by circulating hot water to remove all traces of washing solution (Fig. Tank-D). Drain at the end.
•  Follow by steaming with dry saturated steam to sterilize the surface (Fig. section-E).
•  Follow by treatment with a hot air blast to remove the remaining moisture(section-F of Fig.).

Progressive Cleaning & Sanitization Operations in Can Washer
Straight Through Can washer

The above procedure is usually followed in straight-through can washer and similar process is used in rotary type can washers. However, some changes in the above cycle could be made to suit the specific requirement depending upon the design of container, availability of steam or design features of can washer.

In the simple can washing machine popularly known as can scrubbers, the emptied milk can after draining of milk, is scrubbed with the brushes submerged in detergent solution maintained at 45 to 50OC temperature. Later on the can is rinsed with clean water followed by sterilization in the steaming block.