Cleaning in place (CIP), also known as cleaning positioning or positioning cleaning. CIP cleaning system is widely used in food and beverage production enterprises with high degree of mechanization such as beverage, dairy, juice, pulp, jam and alcohol.
CIP cleaning process
1. Pre-flush → detergent rinse → final rinse
Advantages and disadvantages of CIP cleaning
CIP cleaning system can ensure a certain cleaning effect, improve product safety; save operating time, improve efficiency; save labor, ensure operation safety; save water, steam and other energy, reduce detergent usage; production equipment can achieve large-scale, automation High level; prolong the service life of production equipment. Mechanism of action of CIP cleaning Chemical energy is mainly produced by chemical agents added to it, and it is the most important factor determining the washing effect.
The advantages of acid and alkali detergents are: pickling can remove residues such as calcium salts and mineral oil by chemical reaction; alkali washing can remove residues such as fat and protein by saponification reaction.
Disadvantages of acid and alkali detergents: poor water washability.
The advantages of the sterilizing agent are: rapid bactericidal effect, effective for all microorganisms; generally non-toxic after dilution; not affected by water hardness; forming a film on the surface of the device; easy to measure concentration; easy to measure;
Disadvantages of sterilizing agent: have special taste; need certain storage conditions; different concentrations of bactericidal effect are different; when the temperature is low, it is easy to freeze; improper use will produce side effects; the bactericidal effect of mixing with dirt will be significantly reduced; Leave traces.
In general, the longer the cleaning time, the better the effect. However, in industrial production, the rate of production must be guaranteed, and the cleaning time is usually 2 to 3 times the full coverage time. At each step of the entire in-place cleaning process, the cleaning time is taken as the running time.
If a proteinaceous material is present, the proteinaceous material is removed as much as possible without altering its properties, and the pre-flushing needs to be carried out at a suitable temperature. Subsequent scouring and washing should be carried out at higher temperatures, typically 60-80 °C, to increase the ability of the wash to dissolve other contaminants.
Under normal circumstances, low pressure (less than 0.5 MPa) spray can meet the cleaning requirements. Because cleaning is mainly achieved by wetting, advection, and soaking of the cleaning agent, rather than by mechanical impact.