BOILER PLANT WITH NATURAL CIRCULATION OF HEAT-TRANSFER AGENT Russian patent published in 1998 - IPC

FIELD: water heating systems; hot water supply systems. SUBSTANCE: boiler plant includes boiler 1 with smoke stack 2 which is provided with water jacket 3, expansion tank 4 with overflow tube 5, supply tube 6 which may deliver hot water to any story of building. Cooled water enters return line 7 of boiler 1. Smoke stack 2 with water jacket 3 is provided with insulation 8 and is coated with casing 9; condensate formed due to contact of flue gases with smoke stack 2 flows down smoke stacks 2 is removed through steam trap 10. EFFECT: saving of fuel due to use of latent heat. 1 dwg