WATER-TUBE WATER BOILER Russian patent published in 2000 - IPC

FIELD: boiler houses. SUBSTANCE: boiler has burner, cylindrical casing with inlet and outlet pipe connections for medium being heated, furnace, and convective heating surfaces made of straight horizontal tubes whose ends enter vertical annular transfer headers. Internal transverse partitions are mounted between holes for welding-in heat-transfer tubes either side of water inlet pipe connection located at bottom of one of annular headers; other annular header coupled with the former through heat-transfer tubes accommodates opposing internal transverse partitions arranged in staggered manner for multiple-pass reciprocating and upward-horizontal flow of water at speed preventing surface water boiling up to water outlet pipe connection located on top of outlet annular header. Downward water flow is also made impossible. EFFECT: improved reliability and extended service life of boiler. 2 cl, 3 dwg