Combustion – Fuel disperser installed in furnace – With discrete flame directing baffle
Patent
1985-12-10
1987-10-06
Scott, Samuel
Combustion
Fuel disperser installed in furnace
With discrete flame directing baffle
138 38, 138 42, 431354, 239463, 239472, F23M 906
Patent
active
046980164
DESCRIPTION:
BRIEF SUMMARY
Old experience shows that combustion will be more complete if the gases are rotated to mix different parts of the gas flow. This mixing preferably takes place near a high temperature part of the route of the combustion gases.
The aim of the present invention is to propose a gas turbulator for different kinds of combustion devices, and which has a considerable effect in promoting an efficient final combustion of the gases, thereby increasing the thermal efficiency. The invention can be used on combustion devices in boilers for direct heat exchange, but can also be used in plants for destruction of pollution gases, e.g. exhausts from combustion engines or certain industrial processes.
The turbulator can be designed so the entire gas flow is compelled to pass through it, and it is characterized by a double-walled unit completely filling the outlet from said chamber and wherein a first membrane wall meeting the stream of gas has radial slits, each having an oblique wing along at least one edge, a second membrane wall having a central opening but otherwise having no disruptures, and an expansion outlet connected to said opening. The expression passageway includes any suitable part of a passage or a conduit.
The expansion nozzle preferably is formed as an expansion outlet and its outlet edge is preferably rounded.
At a turbulator adapted to a combustion device including a final combustion chamber with water cooled walls, the nozzle reaches substantially towards a cooled end wall in the final combustion chamber.
The first membrane wall can have a centrally located inspection opening.
The invention will now be described by way of example with reference to the accompanying drawings, in which
FIG. 1 is a vertical section through a hot water boiler,
FIG. 2 on a larger scale shows a section along line II--II in FIG. 1,
FIG. 3 shows part of the exhaust manifold of an internal combusion engine having turbulators fitted in the outlets from the individual cylinders,
FIG. 4 shows an exhaust manifold having a single turbulator in the common exhaust connection, and
FIG. 5 shows a section along line V--V in FIG. 4.
The hot water boiler in FIG. 1 is of a basically well known type and includes a vertical combustion chamber 10 and a final combustion chamber 11 connected thereto. A number of smoke tubes 12 reaches up from this later chamber 11 to an upper collector 13, which is connected to an exhaust conduit 14.
The smoke tubes 12 pass through a water filled drum 15, which is connected to a water cooled wall 16 and bottom 17, respectively, defining the final combustion chamber 11.
The boiler supposedly is connected to a circulation system, from which water returns via a conduit 18, and to which water is fed via another conduit 19.
In the upper part of the combustion chamber there is provided a conventional oil or gas burner 20. The burner can be arranged to give the combustion gases some rotation already within the combustion chamber 10.
In the lower end of the combustion chamber a turbulator 21 made of heat resistant steel is provided, and is so formed, that it completely fills the cross sectional area of the combustion chamber.
The turbulator comprises a double-walled upper part having an upper membrane wall 22, and a lower membrane wall 23. The upper membrane wall has several radial slits 24. Each of these have an oblique downwardly projecting wing 25, along one of its edges, shown on a larger scale in FIG. 2.
The lower membrane wall 23 is mainly undisrupted, but has a central gas exhaust opening 26. An expansion nozzle 27 is connected to this opening and has a rounded outlet edge 28.
The nozzle preferably is formed as an expansion nozzle, wherein some of the velocity increase in the opening 26 is converted into pressure.
In the example shown in the drawings the nozzle 27 reaches down towards the cooled bottom 17. The gases are rapidly cooled there, which decreases the Nitrogen-Oxide contents in the exhaust gases.
The bottom has an inspection opening 29 and there is a central opening 29a in the upper membrane wall 22, through
REFERENCES:
patent: 2287361 (1942-06-01), Suchland
patent: 3664804 (1972-05-01), Flournoy et al.
patent: 4110064 (1978-08-01), Vorona et al.
Flanigan Allen J.
Scott Samuel
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