Regardless of whether it is a single or double-end, a small or large system, all bottle-rinsing machines have similarly arranged cleaning zones.
- Presoak
- Preinjection
- Main caustic solution
- Subsequent caustic solution
- Warm water 1
- Warm water 2
- Cold water
- Fresh water
The cleaning chemicals must be dosed into the respective cleaning zones. Therefore reliable, exact measurements, control and dosing are needed.
In the caustic solution areas, conductive measuring and control systems of types DMT or D1C are used in combination with dosing pumps from the ProMinent Beta, gamma or Sigma product ranges for dosing caustic solutions, additives and defoaming agents. The pH value is checked and scale prevention agents dosed in the water areas while disinfecting components are added in the cold-water areas. Devices from the DMT and D1C family are also used for these tasks, however with probes for pH, Redox, peracetic acid or chlorine dioxide.
 A particularly elegant and hygienic solution is the dosing cabinet with fitted pumps and daytime chemical tanks. The daytime chemical tanks are supplied from the cleaning agent tank stock and their levels monitored. In this way no open chemical or chemical handling takes place in the production area. The dosing lines can be made very short, benefiting dosage precision.
Cost-effective chlorine dioxide is used in the cold-water zone instead of peracetic acid, which is much more expensive. Depending on measured values, chlorine dioxide is dosed into the cold-water zone at around 2.0 ppm and dosed proportional to volume into the fresh water injection line (sterilizing only in permitted concentrations for drinking water). For disinfecting the headspace a valve is provided in the cold-water zone circulation. Because of a certain amount of aerosols containing chlorine dioxide, a better biological picture evolves in the head area.
The ProMinent distribution concept makes it possible to use the ClO2 produced by a central chlorine dioxide plant on one or several washing machines or other applications. |