HOT-WATER BOILER Russian patent published in 1998 - IPC

FIELD: heating and hot-water supply systems. SUBSTANCE: hot-water boiler includes side and ceiling screens. Side screens are composed of radiation 1 and convective heat-exchange 2 tubes united in panel via inlet 3, 4 and outlet 5, 6 collectors. Heat-exchange tube is made up of external 7 and additional internal 8 tubes. Intertube space where heat exchange agent circulates houses spiral swirlers 9 made fast to internal tube 8. End face caps 10 are positioned on butts of heat-exchange tube between tubes 7 and 8. External tube 7 has holes 11 for inlet of heat exchange agent into intertube space out of collector 3 and for its outlet into collector. Ceiling screen incorporates vertically positioned heat-exchange tubes 12 of same design integrated in panel via inlet 13 and outlet 14 collectors. Directed flow of flue gases is provided by installation of partitions 15-17. Gases escape through gas conduit. EFFECT: enhanced operational efficiency. 1 cl, 2 dwg