Advantages and disadvantages of common detergents in CIP cleaning system

CIP cleaning system can ensure certain cleaning effect, improve product safety; save operation time and rate; save labor force and ensure operation safety; save water, steam and other energy, reduce detergent consumption; production equipment can achieve large-scale, high automation level; extend the service life of production equipment The mechanism of CIP cleaning chemical energy is mainly produced by adding chemical reagents, which is the main factor to determine the washing effect Zui At present, there are many kinds of cleaning agents used in food industry, mainly including acid and alkali, among which sodium hydroxide and nitric acid are widely used Alkali detergents can remove the dirt with high protein content, but can corrode the rubber washer of food Acid detergents have a good effect on the scale which can not be removed by alkaline detergent, but they are corrosive to metals Some anti-corrosive agents should be added or washed with water There are also surfactants and chelating agents, but they can only be used in special needs, such as when the hardness of cleaning water is high, chelating agent can be used to remove metal ions When the cleaning agent concentration is increased, the cleaning time can be shortened properly or the deficiency of cleaning temperature can be made up The increase of detergent concentration will cause the increase of cleaning cost, and the increase of detergent concentration does not necessarily improve the cleaning effect effectively, so it is necessary for manufacturers to determine the appropriate concentration according to the actual situation Generally speaking, the chemical reaction speed will be increased by 1.5-2.0 times when the temperature is increased by 10 ℃, the cleaning speed will also be increased correspondingly, and the cleaning effect is good The cleaning temperature is generally not lower than 60 ℃ Cleaning time is affected by many factors, such as type, concentration, cleaning temperature, product characteristics, production pipeline layout and equipment design The cleaning time must be appropriate, too short to remove the dirt effectively, too long to waste resources General manufacturers can choose detergents according to the nature and degree of pollution of cleaning objects, material composition, water quality, selected cleaning methods, cost and safety The common detergents used in CIP cleaning system are acid, alkali detergent and sterilization detergent The advantages of acid and alkali detergents are: acid washing can remove the residues of calcium salt and mineral oil through chemical reaction; alkali washing can remove the residues of fat and protein through saponification reaction Disadvantages: strong irritation to skin; poor washability The advantages of bactericide are: fast bactericidal effect, effective for all microorganisms; generally non-toxic after dilution; not affected by water hardness; forming film on the surface of equipment; easy to measure the concentration; easy to measure; can remove odor The disadvantages are: special taste; certain storage conditions are required; the sterilization effect of different concentrations is different greatly; it is easy to freeze when the temperature is low; side effects will occur if it is not used properly; the sterilization effect of mixed dirt is significantly reduced; it is easy to contaminate the environment and leave traces when it is scattered Acid in acid-base detergent refers to 1% - 2% nitric acid solution, and alkali refers to 1% - 3% sodium hydroxide used at 65 ℃ - 80 ℃ The bactericide is chlorine series bactericide, such as sodium hypochlorite At a certain flow rate, the higher the temperature, the smaller the viscosity coefficient and the larger the Reynolds number (RE) The rise of temperature can change the physical state of the dirt, accelerate the chemical reaction speed, and increase the solubility of the dirt, so that the impurity solution will fall off during cleaning, so as to improve the cleaning effect and shorten the cleaning time The magnitude of motion energy is measured by re