METHOD FOR RECUPERATION OF HEAT OF SPENT DRYING AGENT OF CONVECTION DRIERS WITH REPLACEMENT OF INTERMEDIATE HEAT-TRANSFER AGENT DEPENDING ON MOISTURE CONTENT Russian patent published in 2006 - IPC F26B21/04 

FIELD: control of temperature of air or gas for drying of hard materials or subjects.

SUBSTANCE: the method consists in cooling of the spent drying agent with a transfer of heat from it to the primary heat-transfer agent with the use of a contact heat transfer, heating of incoming air with a transfer of heat to it from the secondary heat-transfer agent with the use of a contact heat transfer and heating of the secondary heat-transfer agent by the primary heat-transfer agent with the use of a surface heat transfer, water or oil is used as the primary heat-transfer agent, depending on the relative humidity of the spent drying agent, secondary-oil, at cooling of the spent drying agent its cleaning of dust by the primary heat-transfer agent is provided.

EFFECT: reduced dimensions and specific consumption of materials of heat recovery devices, prevented their freezing and clogging with dust.

1 dwg