The coil type dryer is an indirect heating system for continuous moisture removal. Steam or thermal oil circulates inside coils; BSFL presscake or other protein meal absorbs heat by conduction without combustion gas contact.
Preferred when plants need stable drying temperature, reduced odor vs direct dryers, and compact integration into insect meal or fishmeal lines.
- Indirect heating prevents scorching of insect meal
- Stable temperature for heat-sensitive proteins
- Lower odor emission than direct drying
- Continuous duty with straightforward maintenance