Circulation cleaning of a plate heat exchanger fouled by tomato juice |
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| Authors: | A T JACKSON WAI MING LOW |
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| Affiliation: | Authors' address: * Department of Chemical Engineering and Procter Department of Food Science, University of Leeds, Leeds, LS2 9JT. |
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| Abstract: | The effect of a change in flow rate of a 2% w/w caustic soda solution on the circulation cleaning of a plate heat exchanger fouled with diluted tomato paste has been investigated at a temperature of 90°C and fixed circulation cleaning times of 5 and 10 min.
For both circulation cleaning times a transition point was noted in the range 2.75–2.86 1/min (Reynolds number range 6600–6300, shear stress range 0.77–0.82 N/m2). Below the transition point the effect of flow rate on cleaning efficiency was minimal, but at flow rates above the transition point there was a marked increase in cleaning efficiency as the flow rate (and hence shear stress at the surface) increased. |
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