HOT WATER BOILER Russian patent published in 2008 - IPC F24H1/00 

FIELD: heating.

SUBSTANCE: invention relates to heat-power engineering and can be used in hot water boilers. Boiler comprises a vertically placed shell with furnace and external convection chamber enveloping the furnace and connected to it; a burner, installed at the boiler cover at the area of furnace; an outlet made in the boiler shell; supply and discharge headers, placed respectively at the boiler bottom and at the boiler cover; and heating surfaces connected to supply and discharge headers and comprising the water-cooled part and convective part, located respectively in the furnace and in the external convection chamber. Besides, the boiler is equipped with a cylindrical baffle, placed between the furnace and external convection chamber, connected to it via the annular gap, formed by the cylindrical baffle and boiler bottom. Outlet is made in the boiler shell near the boiler cover. Water-cooled part is formed by sections; every section is made as a spiral tube, inlet of which is connected to the first intermediate pipe, outlet of which is connected to the second intermediate pipe; the internal surface of spiral tube adjoins the cylindrical baffle. Convective part is formed by the internal and external sections; every section is made as a spiral tube, inlet of which is connected to the third intermediate pipe, outlet of which is connected to the fourth intermediate pipe; the internal section tube is located inside the spiral of the external section tube. The first and the second intermediate pipes are connected to the supply header, while the third and the fourth intermediate pipes - to the discharge header. This design of boiler allows to enhance boiler efficiency, reliability, compactness, and to simplify its manufacture.

EFFECT: enhancement of reliability and efficiency of hot water boiler with reduction of manufacture costs of boiler.

6 cl, 3 dwg