Fouling of heat exchangers in the dairy industry
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, May 1997, Pages 407-424
Heat Exchange Fouling
Fouling of heat exchangers in the dairy industry
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NIZO, 6710 BA Ede, Netherlands
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A general overview is given of the main factors in the fouling of processing equipment used for heating dairy fluids. The data collected indicate that the primary step in fouling is the adsorption of a monolayer of proteins onto the wall of the heating equipment at room temperature. Real fouling (i.e., the formation of macroscopic layers of foulants), however, is caused by particle formation in the bulk of the liquid being processed. These particles include both whey protein aggregates and calcium phosphate particles. Their formation is heat induced, and the deposition takes place through diffusion toward the heating surface. Only very high flow rates are able to prevent their deposition and subsequent sticking. To better control the process of fouling, special attention is given to the parameters affecting the formation of both types of particles and how their formation can be retarded or prohibited, including the role of calcium sequestrants, pH, preheating, and flow rate herewith.
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Model WLWC***C3A
Cooling condition
Cooling capacity
Freezing water flow
Freezing water pressure drop
cooing water flow
cooing water
pressure drop
Refrigerant
Net Weight
Shipping weight
operation weight
Remark：1、Design, manufacturing and inspection based on GB/T7 2、Cooling capacity based on the outlet temperature of chilled water in 7 ℃, chilled water flow rate 0.172m3/ (h.kW); cooling water inlet temperature 30 ℃, the cooling water flow rate of 0.215 m3/ (h.kW). 3、Shell and tube heat exchanger water side design pressure is 1.0MPa4、evaporator fouling factor is 0.018m2 ℃ /W, condenser fouling factor is 0.044m2 ℃ /W.
Model WLWC***C3A
Cooling condition
Cooling capacity
Freezing water flow
Freezing water pressure drop
cooing water flow
cooing water
pressure drop
Refrigerant
Net Weight
Shipping weight
operation weight
Remark：1、Design, manufacturing and inspection based on GB/T7 2、Cooling capacity based on the outlet temperature of chilled water in 7 ℃, chilled water flow rate 0.172m3/ (h.kW); cooling water inlet temperature 30 ℃, the cooling water flow rate of 0.215 m3/ (h.kW). 3、Shell and tube heat exchanger water side design pressure is 1.0MPa4、evaporator fouling factor is 0.018m2℃ /W, condenser fouling factor is 0.044m2℃ /W.
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