Heat Exchanger - 3

Fouling in Heat Exchanger 

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General :

• Deposition of extraneous material on Heat transfer (HT) area.
• Resistance to flow
• increases Pressure drop in order to maintain the flow rate.
• Must be considered during designing & ease of cleaning must be permitted.
• More fouling fluid allocated to tube side & allow access for cleaning
• keep fluid velocity constant
• 5 ft/s for tube side & 3 ft/s for shell side for fouling fluid

Fouling Types:

Fig. 1. Types of Fouling

fig. 2. Corrosion Fouling

fig. 3. Chemical Fouling

                    

fig. 4. Crystallization Fouling

fig. 5. Biological Fouling