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1. WO1991016572 - ECHANGEUR THERMIQUE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. A heat exchanger assembly comprising:
a fire box;
a first combustion chamber riser chamber having a
vertically oriented longitudinal axis and located above the fire box and communicating with the fire box for delivering combustion products upward out of the fire box;
a first plurality of exhaust gas passageways in a
radially extending circular array around the riser chamber, each passageway having an entrance at the top of the riser chamber and extending from the entrance upward and then radially outward relative to the axis and then downward and then outward relative to the axis and then upward and then inward toward the axis and then upward generally parallel to the axis to exhaust.

2. The assembly of claim 1 and wherein:
the portions of the passageways extending downward extend generally alongside the riser chamber.

3. The assembly of claim 2 wherein:
the portions of the passageways extending generally alongside the riser chamber extend generally parallel to the longitudinal axis of the riser chamber.

4. The assembly of claim 3 wherein:
the riser chamber has a top and a bottom; and
the portions of the passageways extending downward generally alongside the riser chamber extend downward to a level generally corresponding with the level of the bottom of the riser chamber, and the first mentioned portions of the passageways extending upward extend upward to a level generally corresponding with the level of the top of the riser chamber.

5. The assembly of claim 1 and further comprising:
a second plurality of exhaust passageways in an array around the riser chamber, each passageway of the second plurality having an entrance at the top of the riser chamber and extending from the entrance upward and outward relative to the axis and then downward and then outward and then upward and then inward toward the axis and then upward generally parallel to the axis and to a exhaust.

6. The assembly of claim 5 and wherein:
the passageways are provided by tubes; and
the tubes of the first plurality are 1 1/2 inch diameter; and
the tubes of the second plurality are 2 inch diameter.

7. The assembly of claim 5 and further comprising:
a plurality of water tubes in the riser chamber and extending generally parallel to the axis and circularly spaced from each other around the axis, the water tubes being arranged in pairs at diametrically opposite points in a circle; and
connector tubing means at the bottom of each pair for providing communication between the two tubes of a pair for a water flow path down one of the tubes of the pair and through the connector tubing means and up through the other tube of the pair.

8. The assembly of claim 1 and wherein the passageways are provided by tubes, the assembly further comprising:
a plenum around the plurality of tubes to direct air flow around them.

9. The assembly of claim 8 and further comprising:
first and second vertically-spaced tube plates, the first tube plate being fastened to the top of the riser chamber, and the second tube plate being fastened to the bottom of the riser chamber and sealed to the riser chamber,
the tubes being secured to and positioned by the tube plates, and the passageway entrances being located in the first tube plate,
the plenum being sealed to the tube plates.

10. The assembly of claim 9 and further comprising:
an exhaust stack above the first tube plate,
the tubes passing upward into and opening inside the stack.

11. The assembly of claim 10 and further comprising:
a plurality of water tubes extending downward through the first tube plate and into the riser chamber and extending downward in the riser chamber to a location near the bottom of the riser chamber for exposure to hot gases flowing from the combustion chamber upward through the riser chamber,
and the water tubes then turning upward and up through the riser chamber and top plate to the exterior for delivery of hot water therefrom.

12. The assembly of claim 11 and further comprising:
a burner coupled to the fire box; and
a water supply coupled to the water tubes.

13. The assembly of claim 12 and further comprising:
air mover means coupled to the plenum for driving air through the plenum to collect heat from the combustion products flowing through the passageway tubes.

14. The assembly of claim 13 and further comprising:
a source of combustible material coupled to the burner for burning in the fire box.

15. The assembly of claim 9 and wherein:
the plates have pluralities of holes in them to receive the tubes through them, the holes being arranged on radial lines at 15 degree angles between them.