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. 4)

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Notice the dramatic change in the water flow required when changing from one rinse to two or more counterflowing rinses. The greatest change takes place when adding the second rinse tank.

Looking across the 100:1 ratio line, there is a 10-time change in flow requirement from one rinse to two rinses. For a higher ratio, for example 10,000:1, the change is even greater. The flow required is one percent (100 gallons) when using two rinses.

Another interesting aspect of this table is the small change in flow requirements in the five-countflow column. When using five rinses, you need to increase from 2.3 gallons to seven gallons to change the rinse ratio from 100:1 to 20,000:1. With four or five rinses, a very small change in water flow leverages a large change in the rinse ratio.

Most existing process lines suffer from a lack of rinsing. Whenever use of adding counterflow rinse tanks is suggested, the most common complaint is that there is no room thus rinsing suffers and water flow remains high.

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