Water-tube boilers of vertical or steeply-inclined type

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F22Steam generation F22BMETHODS OF STEAM GENERATION STEAM BOILERS

F22B21/00Water-tube boilers of vertical or steeply-inclined type

F22B21/002involving a single upper drum F22B21/005involving a central vertical drum, header or downcomer F22B21/007specially adapted for locomotives F22B21/02built-up from substantially straight water tubes F22B21/04involving a single upper drum and a single lower drum F22B21/06the water tubes being arranged annularly in sets F22B21/065involving an upper and lower drum of annular shape F22B21/08the water tubes being arranged sectionally in groups or in banks F22B21/081involving a combustion chamber, placed at the side and built-up from water tubes F22B21/083involving an upper drum and a lower drum and a fire-place between the two drums F22B21/085the tubes being placed in layers F22B21/086Frames built-up from water tubes F22B21/088involving an upper drum and a lower drum and two lateral drums F22B21/10the water tubes being arranged in staggered rows F22B21/12involving two or more upper drums and two or more lower drums F22B21/123involving crossed water tubes F22B21/126involving more than two lower or upper drums F22B21/14involving a single upper drum and two or more lower drums F22B21/16the lower drums being interconnected by further water tubes F22B21/18involving two or more upper drums and a single lower drum F22B21/185involving more than two upper drums and a single lower drum F22B21/20involving sectional or subdivided headers in separate arrangement for each water-tube set F22B21/22built-up from water tubes of form other than straight or substantially straight F22B21/24bent in serpentine or sinuous form F22B21/26bent helically F22B21/28bent spirally F22B21/30bent in U-loop form F22B21/32disposed horizontally in abutting connection with upright headers or rising water mains F22B21/34built-up from water tubes grouped in panel form surrounding the combustion chamber F22B21/341Vertical radiation boilers with combustion in the lower part F22B21/343the vertical radiation combustion chamber being connected at its upper part to a sidewards convection chamber F22B21/345with a tube bundle between an upper and a lower drum in the convection pass F22B21/346Horizontal radiation boilers F22B21/348Radiation boilers with a burner at the top F22B21/36involving an upper drum or headers mounted at the top of the combustion chamber F22B21/363involving a horizontal drum mounted in an upper corner of the boiler F22B21/366involving a horizontal drum mounted in the middle of the boiler F22B21/38Component parts thereof F22B21/40built-up from water tubes arranged in a comparatively long vertical shaft