Heat and water recovery from aqueous waste streams

Details Heat and water recovery from aqueous waste streams Heat and water recovery from aqueous waste streams

C - Chemistry, Metallurgy

10

G

196/24

C10G 1/04 (2006.01)

Patent

CA 1143311

L-31 01 HEAT AND WATER RECOVERY FROM AQUEOUS WASTE STREAMS Abstract of the Disclosure A hot aqueous waste, containing solids, such as tailings from the hot water extraction of bitumen from tar sands, is contacted with air to increase the heat and moisture content of the air, followed by contacting the heated and moisturized air with water to condense moisture from the air and increase the heat content of the water, with the heated water containing condensed moisture being employed as make- up hot water in the extraction. Water recovery can be further increased by subjecting at least a portion of the tailings, prior to contact with air, to an evaporation procedure wherein heat requirements are provided by indirect heat transfer with steam. Evaporate and condensed steam are employed in the extraction.

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