Fouling

Question 1

What is Fouling?

Answer 1

• build up of sediment on heat exchanger surfaces
• affects rate of heat transfer

Question 2

Corrosion Fouling: Explain & Prevent.

Answer 2

• fouling caused by chemical reaction within HE
• can cause pits
• can cause thick layers or rust or oxide

Prevention:
- coat HE pipes in glass
- change pipe material
- regular cleaning

Question 3

Biological Fouling: Explain & Prevent

Answer 3

• algae fouling
• fouling caused by a build up of microorganisms (bacteria, algae, fungi)
• accumilation creates a layer of biofilm on HE surfaces

Prevention:
- biofouling resistant materials
- high velocity
- chemically treat pipes / fluid
- regular cleaning

Question 4

Precipitation Fouling: Explain & Prevent

Answer 4

• build up of sediment on HE surfaces

Prevention:
- process water - remove solids
- chemically treat water - break solids down
- regular cleaning