A unique high volume processing method, the BSP multiple hearth furnace
offers size flexibility, precise temperature and atmosphere control,
maximum heat exposure, and considerable process versatility at low
operating and maintenance costs.
HOW IT WORKS
A cylindrical, refractory lined steel shell supports a series of refractory hearths, one above the other. A revolving central shaft rotates radial arms that sweep the material across the hearth. Teeth attached to the arms push the material either inward or outward where it drops through holes to the next hearth. The hearths create a multi-chamber effect which allows for different temperature zones within the furnace.
Heat transfer occurs through direct flame radiation and material/gas
contact. Hot gases from combustion rise counter-current to the flow of
material. Contact between the gas and feed occurs across every hearth
and during drops from hearth to hearth. Fuel efficiency typically
improves with the number of hearths used. Recycling of shaft air and
heat recovery exchanges also improves fuel efficiency.
Incredibly versatile, a BSP multiple hearth furnace can handle a wide variety of materials with varying physical and chemical characteristics:
THERMAL DISTILLATION
Carbon Activation, Carbon Regeneration, Charcoal Production
Whatever the process application, the BSP multiple hearth furnace system offers significant advantages. It provides intimate gas to solid contact, maintains close temperature control, handles a wide range of feed materials and yields uniform operating conditions and consistent results.
