HORIZONTAL FLUE BOILER Russian patent published in 2000 - IPC

FIELD: heat power engineering; steam and hot-water boilers. SUBSTANCE: proposed boiler has cylindrical housing with tube plate fitted at front and bottom at rear, thus forming water-filled space. Cylindrical flame tube is arranged inside housing water space eccentrically, with axis displaced downwards. Flame tube is provided with front and rear elliptical bottoms and first-pass tire tubes equally spaced over circumference coaxially with flame tube. Second- pass fire tubes surround flame tube on part of its circumference. Front end of flame tube provided with elliptical bottom has sharply bent elbows and t-pieces connecting flame tube space with first-pass fire tubes. Outlet ends of first-pass fire tubes are secured in holes of inner wall of rotary chamber adjoining boiler bottom, and inlet ends, in conical holes of t- pieces, thus forming diffusers together with t-pieces. Opposite holes of T-pieces are sealed by stoppers shaped to radius. Inlet ends of second- pass fire tubes are secured in holes of rotary chamber inner wall, and outlet ends, in tube plate holes. EFFECT: increased heating surface area at constant overall dimensions, intensified heat transfer, improved aerodynamic characteristics and reduced amount of harmful matter in combustion products. 3 dwg