In the dairy industry, there are a number of heat exchangers used. The first type of heat exchanger is milk pasteurizer. They are used in manufacturing both the cream and the milk. They are usually based on the parameters of the dairy industry involved. These parameters are but not limited to; necessary conditions for homogenizer and milk separator which suit the milk pasteurizer, feed temperature for either milk or cream, availability of cooling media, availability of heating media, automated temperature control, and automated diversion of underheated milk. The advantage that most of the operations of the equipment are automated hence reduces the wastage of resources such as time, and heat generated by electric power.
The second heat exchanger is the batch pasteurizer. The vessels have SS inner shell coated with dimple jacketed layer which helps in smooth circulation of air. An option of having this equipment fitted with scrappers, mixers or agitators is provided. The tanks are manufactured with tubular legs for support. The advantage of these heat exchangers is that they are economically friendly and they make easier hence facilitating the production process.
They are also designed to suit the preference of the customer (Beyer, 1985). The third type of heat exchanger is the ghee boiler. These are heat exchangers present in ghee processing industries. They are used in the manufacturing of ghee. They are fitted with motorized scrappers and are hemispherical in shape. They contain a tubular continuous melting system which has a pump and a mixing system of hot water steam. Their advantage is that they are provided with a jacket which acts as insulator hence preventing the loss of heat.
The abbreviation stands for cleaning in place. Different manufacturer manufactures different C. I.P systems. These types include; PLC controlled system which is skid mounted, single or double CIP circuit PHE for heating and fitted with a PLC panel, single or double CIP circuit that is semi-automated with an electric timer, a single pump with small rectangular tank which is double partitioned fitted with a manual CIP system suitable for small plants among other types.
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