TABLE OF CONTENTS In this chapter the equations and models previously described in detail (Wakeman and Tarleton, 2005a) are used to provide process engineering models for continuous filter cycles. The models facilitate detailed calculations and provide a platform for the development of computer simulations. While there is scope to predict the performance of many of the continuous filters described in Chapter 1, those shown in Table 7.1 are discussed in sufficient detail to model and simulate their filter cycles.
| Filter type | Washing | Gas deliquoring | |
|---|---|---|---|
| Horizontal belt | Y | Y | |
| Rotary drum: | |||
| Bottom fed, all variants | Y | Y | |
| Top fed | Y | ||
| Internal fed | Y | ||
| Rotary table | Y | Y | |
| Rotary tilting pan | Y | Y | |
| Rotary disc | Y | ||
| All feature an initial cake formation (filtration) phase. |
In Section 7.1 the principal features of common continuous filter cycles are described, while Section 7.2 presents the equations required to model these cycles. Section 7.3 provides detailed example calculations for the horizontal belt filter and the rotary drum filter as these are representative of typical continuous cycles. Section 7.4 shows how computer simulations can be used to examine in detail the effects of process variables on continuous filter performance. Appendix A provides additional information on the acceptable ranges for operational parameters in continuous filters, while Appendix D outlines the principles involved in...
