Combustion – Pot type burner – Having means for continuously feeding fuel
Patent
1983-11-17
1987-02-17
Focarino, Margaret A.
Combustion
Pot type burner
Having means for continuously feeding fuel
431338, 126 93, F23D 502
Patent
active
046436731
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a burner system of evaporation type for liquid fuels, for example Diesel oil, where fuel is intended to be supplied via an inlet into a combustion space, preferably at one end thereof, and where an ignition member, for example a glowing filament, is provided to initiate evaporation and ignite the fuel, and where means for the supply of air to the combustion space are provided.
The burner according to the invention is intended to be used, for example, at heating units for heating boats, caravans etc. Burners of this type and for this purpose are known previously. One problem with known burners is that a substantial fan capacity is required for achieving an intimate mixing between the gasified fuel and the combustion air supplied. This is, of course, a serious problem, for example at leisure boats, in view of their relatively low battery capacity for fan operation.
A further problem with known burners is coking at the fuel inlet as it can disturb the fuel supply. Coking is caused by the combustion taking place in substantially direct contact with the inlet. Known burners, moreover, have very poor control properties, and in most cases on-off control with constant air and fuel supply is used, which implies a permanent high consumption of electric energy at operation.
The burner according to the present invention is designed so that are aforesaid problems are eliminated or substantially reduced. With the burner, for example, an extremely intimate mixing of gasified fuel with air is obtained without high fan capacity, whereby the electric energy demand is reduced substantially. The combustion, further, takes place at full capacity separated from said inlet. The control capacity, besides, compared with known burners is good. The special design of the burner also prevents "growling" combustion noise, which usually occurs at known burners.
The present invention, thus, relates to a burner system, for example at heating units, comprising a burner of evaporation type for liquid fuel, for example Diesel oil, where fuel is intended to be supplied via an inlet into a combustion space, preferably at the bottom thereof, which combustion space preferably is substantially cylindric and open at the end opposite to said bottom, and where preferably an ignition member, for example a glowing filament, is provided to initiate the ignition of gasified fuel, and where means for the supply of air to the combustion space are provided.
The burner system according to the invention is particularly characterized in that at least one turbulence generating member, a turbulator, for example in the form of a central piece or the like, with blades, wings or the like projecting substantially radially therefrom, is located substantially perpendicularly to the longitudinal axis, vertical axis of the combustion space and substantially in parallel with said bottom, thereby dividing the combustion space into a lower and an upper space and effecting an intimate mixing of air and fuel vapour at the passage past the turbulator, that a first ring of apertures or the like extending substantially in the circumferential direction of the combustion space is provided for supplying air to said lower space, and that in a corresponding manner at least one additional, second, ring of apertures or the like is provided for supplying air to said upper space.
The invention is described in greater detail in the following, with reference to one embodiment thereof and to the accompanying drawing, in which
FIG. 1 is a schematic vertical central section through an embodiment of a burner according to the invention,
FIG. 2 shows a quarter of an embodiment of a turbulator according to the invention,
FIG. 3 is a partially sectional vertical view of a heat exchanger for a burner according to the invention, and
FIG. 4 is a view from the left in FIG. 3 of a heat exchanger according to FIG. 3.
In FIG. 1 the shell surface or wall of a combustion space comprised in the burner according to the invention is designated by 1. Said combustion space preferably
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Focarino Margaret A.
Odar H. A.
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