Combustion – Pot type burner – Having means for continuously feeding fuel
Patent
1981-06-10
1984-08-21
Jones, Larry
Combustion
Pot type burner
Having means for continuously feeding fuel
431333, 431342, 431341, F23D 504
Patent
active
044667906
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a pot burner for liquid fuel, comprising a single pot having at the top a flame orifice, the passage area of which is smaller than the passage area for fuel vapours in the pot, a jacket surrounding the pot, means for the supply of liquid fuel and means for the supply of primary and secondary air.
A pot burner of this type is used in general for heating small rooms. During operation liquid fuel is conveyed from a level-control through a supply duct to the pot bottom. The liquid fuel supplied is uniformly spread across the substantially horizontal pot bottom and gasified by the high temperature of the surface of the pot bottom. However, if such a pot burner is employed as a heating device for spaces in a vehicle or a vessel, the horizontal position of the pot bottom is not at all ensured due to rocking movements or to an inclined position of the vehicle or the vessel. In this case the distribution of the supplied liquid fuel across the pot bottom will not be uniform in different, desired control-positions of the level-control, which is inconvenient in that the gasification process is not satisfactorily performed, the flame becomes unsteady and the efficiency of the combustion is not at the optimum as a result of which soot is produced and the CO-contents of the combustion gases is high.
The invention has for its object to provide a pot burner of the kind set forth above, which due to certain provisions, is particularly suitable for use as a space heating device in vehicles, vessels or other objects subjected to rocking movements. A further object of the invention is to provide a very simple construction of the pot burner so that its manufacture can take place at low cost.
The pot burner according to the invention is characterized by a ring arranged concentrically with the pot wall and connected with the pot bottom for limiting the surface of the pot bottom to be wetted by liquid fuel, by an orifice arranged centrally in the pot bottom for the supply of liquid fuel, by a first inverted cage snugly embracing the outer surface of said ring and having a closed top wall and an apertured sidewall, by a second inverted cage arranged concentrically inside the first cage and having a closed top wall and an apertured sidewall, the lower side of which extends inside the space confined by the ring and the pot bottom without contacting the surface of the ring and the pot bottom, the distance between the lower edge of the sidewall of the second cage and the pot bottom being such as to ensure that under all operational conditions of the pot burner the gasification is maintained irrespective of deviations of the central axis of the pot burner from the vertical position occurring within given limits.
The invention will now be described more fully with reference to the following figures:
FIG. 1 is a diagrammatic, vertical sectional view of one embodiment of a pot burner constructed in accordance with the invention,
FIG. 2 is an exploded view of part of the sidewall of the first inverted cage,
FIG. 3 is an exploded view of part of the sidewall of the second, inverted cage, and
FIG. 4 is a variant of a pot burner shown in FIG. 1.
As shown in FIG. 1, the pot of the burner comprises a cylindrical sidewall 1, a bottom 2, and a top wall 3 having a recess giving access to a flame orifice 4. The flame orifice 4 is bounded by an axially extending wall 5, which is at right angles to the top wall 3 of the pot.
The pot is surrounded by a jacket 6, which joins the top edge of the wall 5 of the flame orifice extending as far as beyond the pot bottom 2 and has, on the bottom side, an orifice 7 for the inlet of air forced in by means of a fan (not shown). The air sucked in is driven upwards in the space between the pot wall and the jacket and subsequently conducted away through apertures 8 dispersed along the height of the pot wall into the pot as primary air and respectively conducted away through apertures 9 in the wall 5 of the flame orifice 4 as secondary air.
In a conventional manner a duct 10 connected with a l
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Jones Larry
Price Carl
Research Instituut "Sesto" B.V.
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