FIELD: power engineering. SUBSTANCE: combustion products enter gas flue 7 where they pass in succession through surface heat exchanger 5, contact chamber 10 with water spraying device 16 and filtering checker 9 and condensing surface 6. Arranged inside checker 9 is sprinkler 15. Water receiver 4 is located under above-mentioned members. Side walls of water receiver and heat-exchange elements of condensing surface 6 are inclined to horizontal plane. Ash separated from gas flow settles in water receiver 4 and is carried to ash discharge branch pipe by means of screw conveyer 2. Water receiver 4 is connected to sprinkler 15 of checker 9 and to water spraying device 16. EFFECT: enhanced efficiency. 1 dwg
