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US 7,137,360 B1Granted
Tube assembly for a boiler
AssigneePrime Boilers Inc.
InventorVittorio Zorzit
Life of this patent
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Abstract
A boiler is described comprising a housing with a flue gas inlet for receiving a hot gas flame and an outlet for venting a hot gas produced by the hot gas flame, and a tube assembly mounted within the housing. The tube assembly comprises a lower manifold for receiving a liquid, an upper manifold for receiving a heated version of the liquid; and, a plurality of tubes disposed between the lower and upper manifolds. Each tube is shaped to provide a hot gas pathway that travels in a parallel fashion along at least a lower portion of the longitudinal extent of each tube in the tube assembly to the outlet, whereby the liquid introduced into the lower manifold travels in the plurality of tubes and receives heat from the hot gas along the extent of the hot gas pathway.
Claims20
A boiler comprising:
- a) a housing with a flue gas inlet for allowing a flue gas flame to enter the boiler and an outlet for venting a flue gas produced by the flue gas flame;
- b) a tube assembly mounted within the housing, the tube assembly comprising:
- i) a lower manifold for receiving a liquid,
- ii) an upper manifold for receiving a heated version of the liquid;
- iii) a downcomer pipe connecting the lower and upper manifolds for providing natural convective circulation of the liquid when a burner fires into the boiler;
- iv) a plurality of tubes disposed between the lower and upper manifolds, wherein a majority of the plurality of tubes include lateral tube runs having a longitudinal extent oriented substantially perpendicular to the plane of the flue gas inlet and, the plurality of tubes being shaped to provide, in combination with adjacent tubes, a flue gas pathway oriented in a parallel fashion with respect to at least a portion of the length of the tube runs along the longitudinal extent of the majority of the plurality of tubes in the tube assembly to the outlet;
- and
- v) a plurality of blocking members generally oriented horizontally with respect to the longitudinal axis of the lateral tube runs and located on a portion of some of the lateral tube runs to restrict the vertical extent of the flue gas thereat,
- wherein, during use, the liquid introduced into the lower manifold travels in the plurality of tubes and receives heat from the flue gas flow along the extent of the flue gas pathway.
6 more elements
A tube assembly for use in a boiler having a flue gas inlet, the tube assembly comprising:
- a) a lower manifold for receiving a liquid,
- b) an upper manifold for receiving a heated version of the liquid;
- c) a downcomer pipe connecting the lower and upper manifolds for providing natural convective circulation of the liquid when the boiler fires;
- d) a plurality of tubes disposed between the lower and upper manifolds, a majority of the plurality of tubes including lateral tube runs having a longitudinal extent oriented substantially perpendicular to the plane of the flue gas inlet when the tube assembly is installed in the boiler, the plurality of tubes being shaped to provide a flue gas pathway that is substantially parallel with linear portions of the tube runs of the majority of the plurality of tubes, the flue gas pathway including a sinuous pathway comprising a plurality of lateral flue gas pathways that are vertically superposed with respect to one another;
- and,
- e) a plurality of blocking members generally oriented horizontally with respect to the longitudinal axis of the lateral tube runs and being located on a portion of some of the lateral tube runs to restrict the vertical extent of the flue gas thereat, wherein, during use, when a burner fires a flue gas flame into the boiler, a flue gas flow follows the flue gas pathway and transfers heat to the liquid as the liquid travels in the plurality of tubes from the lower manifold to the upper manifold.
3 more elements
A tube assembly for use in a boiler, the tube assembly comprising:
- a) a lower manifold for receiving a liquid,
- b) an upper manifold for receiving a heated version of the liquid;
- c) a downcomer pipe connecting the lower and upper manifolds for providing natural convective circulation of the liquid when the boiler fires;
- d) a plurality of tubes disposed between the lower and upper manifolds, a majority of the plurality of tubes having a lower section and an upper section shaped to provide, in combination with adjacent tubes, a lower flue gas pathway and an upper flue gas pathway, the lower section of the majority of the plurality of tubes having a shape for guiding the lower flue gas pathway in a parallel fashion with respect to substantially linear portions of the lower section of the majority of the plurality of tubes for transferring heat to the liquid as the liquid travels in the tube assembly from the lower manifold to the upper manifold when a burner associated with the boiler fires a flue gas flame and wherein the exterior of the lower section of the majority of the plurality of tubes provide a closed end wall disposed with respect to the burner such that, in use, the flue gas flame is generally directed towards the closed end wall when the burner fires;
- and
- e) a plurality of blocking members generally oriented horizontally with respect to the longitudinal axis of lateral portions of the upper section of the plurality of tubes and located on a portion of the upper section of some of the plurality of tubes to restrict the vertical extent of the flue gas thereat.
3 more elements
Dependencies are inferred from the claim text.