Heating apparatus

Details Heating apparatus Heating apparatus

B - Operations, Transporting

01

F

259/8

B01F 15/06 (2006.01) F26B 23/10 (2006.01) F27D 3/00 (2006.01) F27D 13/00 (2006.01)

Patent

CA 1284490

HEATING AND/OR DRYING APPARATUS Abstract of the Disclosure This application discloses several components relating to a heating apparatus which preferably are used in conjuction with each other in an apparatus for heating solid granular or particulate material, such as aggregate used to make asphalt concrete. One component of the present invention includes a heater-condenser unit (32) which indirectly heats the material by circulating heat transfer fluid within hollow plates (240) contained in a housing (232) holding the material. The material is heated, the heat transfer fluid is condensed and a condensate removal means (258, 259, 260) associated with the hollow plates (240) removes the condensate from the housing (232). The heat transfer fluid used in the heater-condenser (32) preferably is supplied in the form of a vapor or gas evolved from liquid contained in material heated by another type of heater (38). In this other type of heater (38), the material to be dried enters a chamber (106) containing hollow heat exchange plates (180) through which a primary heat transfer fluid is circulating. The material is heated to a temperature at which the liquid is evaporated and the evolved vapor is collected within the heater (38), routed through an accumulating apparatus (190, 194, 199, 200) and transferred out of the heater (38) to the heater-condenser (32).

546166

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