FILTERING HEAT-EXCHANGE APPARATUS Russian patent published in 2001 - IPC

FIELD: heat-power engineering; heating plants, hot-water supply systems working on low-potential natural heat sources. SUBSTANCE: proposed filtering heat-exchange apparatus includes cylindrical housing filled with heat-transfer agent, coil for medium to be heated with inlet and outlet branch pipes which are connected to lower portion of housing; besides that housing contains layer of loose filter material in which at least four tubular coils are immersed; coils are located concentrically one inside another; inlet branch pipes of two outer and two inner coils are connected in pairs to lower portion of housing; outlet branch pipes are similarly located at upper level of loose filter material. EFFECT: possibility of recovering heat of sewage cleaning sewage and heat-transfer surfaces of apparatus. 3 dwg