BOILER FURNACE OF POWER PLANT (VERSIONS) Russian patent published in 2012 - IPC F22B21/06 

FIELD: heating.

SUBSTANCE: invention refers to power industry and can be used in boiler furnaces. In order to enlarge the flame contact area, furnace space formed with external water-supply tubular section and internal water-supply tubular section has the shape corresponding to natural flame shape. Boiler furnace includes external and internal water-supply tubular sections receiving the water with further heating of received water (including heating up to vaporous state). Diameter of external section either gradually increases, or remains constant in the section from its lower part to middle part. Then, in the section from middle part to upper part, first it is reduced, then, enlarged, and after that, again reduced. First, diameter of internal section in the section from its lower part to middle part (M) is gradually reduced, and then enlarged. Then, in the section from middle part (M) to upper part, first it is reduced, then, enlarged, and after that, again reduced. Furnace space formed between external water-supply tubular section and internal water-supply tubular section is first gradually enlarged, and then reduced in the section from its lower part to middle part (M); at that, in the section from its middle part to upper part the above furnace space has bent shape.

EFFECT: invention allows increasing temperature of water heated in sections and improving thermal efficiency.

16 cl, 8 dwg