CONTACT HEAT RECOVERY UNIT Russian patent published in 1996 - IPC

FIELD: heat power engineering. SUBSTANCE: hot gas gets into manifold 13 and is directed through holes in wall under nozzle 6 arranged in housing 4. Summary section of holes increasing in height contributes to uniform distribution of gas low over section of housing 4. Cold water from sprinkler 8 passes to perforated plate 9 with central gas bypass branch pipe whose outlet end face is provided with saw-type teeth. Further on water passes through plate perforations and between teeth to nozzle 6 where it gets heated by gas. EFFECT: heating of water by exhaust gases. 2 cl, 4 dwg