Application Heater Zinc Phosphate Solution
Industry Steel Coating Industry
Fouling Issue / Frequency

The heat exchanger is installed in a new plant. Based on experiences in the industry, with plate heat exchangers, fouling was expected. There is no data for this plant on fouling and the fouling frequency

Solution / Approach

A shell & tube heat exchanger with the self-cleaning configuration to heat up and keep a zinc phosphate bath at a constant temperature. In the zinc phosphate bath steel components are treated with zinc phosphate. The cleaning particles are separated in a gravity separator.

Process Conditions Tube Shell
Medium Zinc Phosphate Solution Hot Water
Pressure 2.0 bara 2.0 bara
Temperature In: 70oC
Out: 71oC
In: 80oC
Out: 78oC
Flow 60 m3/h 30 m3/h
Number of Tubes 43
Length of Tubes 2.5 m
Diameter Tubes 33.4 mm
Particle Type Ceramic Al2O3
Particle Size 3.0 mm

Since the installation, the self-cleaning configuration has kept the heat exchanger tubes clean

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