Читать книгу Introduction to Linear Regression Analysis - Douglas C. Montgomery - Страница 14

Consider the acetone–butyl alcohol distillation column shown in Figure 1.6. The operating personnel are interested in the concentration of acetone in the distillate (product) stream. Factors that may influence this are the reboil temperature, the condensate temperature, and the reflux rate. For this column, operating personnel maintain and archive the following records:

 The concentration of acetone in a test sample taken every hour from the product stream

 The reboil temperature controller log, which is a plot of the reboil temperature

 The condenser temperature controller log

 The nominal reflux rate each hour

The nominal reflux rate is supposed to be constant for this process. Only infrequently does production change this rate. We now discuss how the three different data collection strategies listed above could be applied to this process.

Figure 1.6 Acetone–butyl alcohol distillation column.