Article Contents

1. Introduction
2. Example 1
3. Examples 2 and 3
4. Lessons Learned
5. Other Improvements
6. Dragout Tank
7. Sprays
8. Counterflowing Sprays
9. The Bottom Line

Ten Minutes to Better Rinsing
(p. 6)

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The Dragout Tank (Dead Rinse)

Much has been said, and still more is believed, about dragout tanks. Two things are true about dragout tanks. First, if there is no water inlet or outlet, the tank is truly dead and useless. The concentration will increase to where it is the same as the process tank. Second, if some water does leave the dragout tank (to the process tank or drain), and then makeup water must be piped in, this defines a rinse tank. You will use less water and get better rinsing if the dragout tank is used as a rinse and included in the chain of counterflowing rinses.

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