HEAT RECOVERING UNIT Russian patent published in 2003 - IPC

FIELD: heat engineering, possibly recovering exhaust gases of boiler aggregates. SUBSTANCE: unit includes two honeycomb heat exchangers, one being main heat exchanger, both mounted in parallel relative to by-passing gas duct; contact type water heater connected to gas duct in front of exhaust fan and heat exchange tube. Cleaning chamber is arranged between vertical part of gas duct and contact type water heater and it is coupled through hose with cyclone that is mounted on gas duct in front of honeycomb heat exchanger. Cleaning chamber is provided with vertical partitions secured alternatively to its bottom and ceiling and with row of funnels secured to its bottom and arranged in dust collector. Outlet of water heater is pneumatically connected with reel for passing gases that is connected with main honeycomb heat exchanger and with descended portion of gas duct. Change-over damper is mounted in upper butt of gas duct and cleaning chamber. Heat exchange tube having pins arranged according to fan shape is placed in gas duct in front of cleaning chamber and it is pneumatically connected through air conduit with water heater. EFFECT: enhanced quality of heated water, gas turbulization, increased time period between repairing operations of heat exchangers. 2 cl, 1 dwg