ABSTRACT
This is one of the most important chapters in the entire book. All the equipment in the solvent extraction plant are covered here. Construction features, together with alternative designs, are discussed in detail, with their suitability for specific applications; this may be of help to project engineers and planners. Sizing and design aspects of all the equipment are outlined, which may be of direct help to plant designers and manufacturers, especially in developing countries.
All the main types of extractors are discussed, while the linear type is described in much detail. The desolventisers, the more popular Schumacher type, the classical type and hybrid designs, are discussed, with their utility for specific applications. The equipment in distillation line and in vent absorption unit are detailed, and their operation principles are explained.
Ancillary equipment such as safety overhead water tank, hexane tanks and cooling tower, which are located within the SEP area, are also discussed in this chapter. Quality of utilities, namely, steam, electricity, water and compressed air, has been discussed in Part 1 of this book.
Process control systems are discussed, along with different levels of plant automation. The control systems are simple and inexpensive; if implemented properly, they can help boost plant productivity and efficiency. Safety precautions during plant operation are laid out.
Finally, recent innovations in equipment deign, as well as in process design, are touched upon, along with a glimpse into a novel extractor design especially suitable for low-protein oil-bearing materials.
