Furnaces – With safety means
Patent
1981-11-20
1984-02-14
Favors, Edward G.
Furnaces
With safety means
110102, 110110, 110224, F23N 524
Patent
active
044309490
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a burner unit for shavings or chips, hereinafter referred to as chips, for firing in a heating boiler provided with a stoker apparatus for feeding the chips to the boiler.
What is novel and characteristic for the unit in accordance with the invention is primarily that the stoker plant is connected to a charging stub in an upper portion of the boiler, that a predesiccating chamber is built up in the combustion chamber of the boiler, and adapted at its upper end to receive the chips fed in through the charging stub, that a control apparatus is formed for regulating the quantity of chips fed by the stoker plant to the chip chamber and that the predesiccating chamber contains a chip chamber and is built up inside the combustion room of the boiler above the fire bars of the boiler and at its lower part is formed with a combustion part for the chips, and that a sloping plane is arranged in the chip chamber for feeding the chips to an adjustable firing grid in the combustion part, where the chips are ignited, said firing grid being arranged at an outlet under the chips chamber, said outlet being the outlet from the chip chamber for the chips which have been predried.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the burner unit in accordance with the invention will be described in the following while referring to the appended drawings whereon:
FIG. 1 illustrates the firing installation seen from the side connected to a boiler,
FIG. 2 is a cross section of the boiler adjacent its hearth openings with the inventive chip chamber installed above the fire bars of the boiler,
FIG. 3 is a cross section of the boiler at right angles to the one shown in FIG. 2 and taken between the chip chamber and the inner separating wall, discernible in FIG. 2, in the boiler,
FIG. 4 illustrates the parts of the chip chamber from FIG. 2 in detail,
FIG. 5 illustrates the chip chamber according to FIG. 4 seen from the side with the combustion part for the chips in its lower portion,
FIG. 6 illustrates the parts of the chip chamber according to FIG. 4 in an exploded view,
FIG. 7 illustrates a connecting iron,
FIG. 8 illustrates a regulating means associated with the control apparatus,
FIG. 9 illustrates the sloping plane and firing grid in the chip chamber seen from above,
FIG. 10 illustrates the sloping plane seen from one side,
FIG. 11 illustrates a supplementation to the sloping plane,
FIG. 12 illustrates a bar for a hinge means for the firing grid,
FIG. 13 illustrates a device for adjusting the firing grid and
FIG. 14 illustrates hooks for the burner unit.
DETAILED DESCRIPTION OF THE INVENTION
The inventive burner unit is formed for firing with shavings or chips in a boiler 1. The unit is provided with a stoker apparatus 2 for feeding the shavings or the chips to the boiler 1 from a storage container.
The stoker apparatus 2 is provided with two conveyor screws, a horizontal one 3 and an upper one 4, which are driven by a common motor but with different speeds by selection of different large gears on the respective conveyor screw 3 and 4.
The conveyor screws 3 and 4 coact for feeding the shavings or the chips to the boiler 1 by the horizontal screw 3 being mounted in a horizontal first pipe 5, which opens out in a quenching chamber 6, in which the charging end 8 of the upper conveyor screw 4 is mounted at a lower level in said chamber 6 than the discharge end 9 of the horizontal conveyor screw 3. There is thus obtained a uniform feed of the shavings or the chips used as fuel, so that packing of the fuel is avoided in the stoker apparatus 2.
The upper feed screw 4 goes from the quenching chamber 6 in a second pipe 7 sloping upwards towards an input 10 on the boiler 1 of a chip chamber 11, which is placed inside the boiler 1 in the combustion room 12 (see FIG. 2).
For this purpose the upper conveyor screw 4 is parted at its upper end and provided with a universal joint and is enclosed by a curved pipe portion 13.
The upper conveyor screw 4 runs through a seal out from the quenching chamber 6 an
REFERENCES:
patent: 2291790 (1942-08-01), Burton
patent: 3046915 (1962-07-01), Ludin
patent: 3485408 (1969-12-01), Benesch
patent: 4167909 (1979-09-01), Dauvergne
patent: 4257338 (1981-03-01), Chasek
patent: 4280415 (1981-07-01), Wirguin et al.
Favors Edward G.
Warner Steven E.
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