GAS HEAT RECOVERY METHOD Russian patent published in 2007 - IPC F02C7/10 F01K9/00 

FIELD: heat power engineering.

SUBSTANCE: invention relates to alternative technologies, particularly, to recovery of heat of gases. Methods is proposed of recovery of heat of gases whose velocity can be lower than 50 m/s including removal of gas flow and directing it inside heat exchanger device along supply branch pipe with cross section in zone of connection different from that of heat exchange device, passing of said flow between heat transfer devices arranged inside heat exchanger device, transmission of heat from gas to working liquid circulating inside heat transfer devices which are divided into separate sections with increasing number of heat transfer devices from one section to adjacent one as gas flows. Flow of working liquid is transmitted in succession from section to section of heat transfer devices in direction opposite to flow of exhaust gases, summary hydrodynamic resistance of heat transfer devices of each section being similar. Velocity of gas flow passing through sections of heat exchange device is maintained optimum owing to reduction of live section of heat exchange device in each section and/or increase in number of heat transfer devices in each section. Condensate accumulating in heat exchange device is periodically drained.

EFFECT: considerable decrease of overall dimensions of used heat exchange device, reduced cost of said device and enlarged sphere of its application.