Combustion – Porous – capillary – particulate or sievelike flame holder,... – Means supplying fuel for passage through the flame holding...
Patent
1991-09-30
1992-11-10
Dority, Carroll B.
Combustion
Porous, capillary, particulate or sievelike flame holder,...
Means supplying fuel for passage through the flame holding...
F23D 1412
Patent
active
051619652
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a surface combustion burner and more particularly to a surface combustion burner having a two-layer structure made by superposing and joining a layer of burning resisting material such as a ceramic material for forming a gas combustion zone and a supporting layer composed for example of a metal fiber mat.
2. Background Art
Among infrared heating apparatus whose application is expected in a wide range of fields such as cooking and heating of foods, drying of coated products and so on, a surface combustion burner is known as one of techniques which employ as a heat source thereof a gas fuel that is low in cost and high in calory.
The surface combustion burner is such that the heat energy of a combustion gas, which is largely taken out by convection in the case of the ordinary combustion, is efficiently converted into a radiant heat and it is designed so that a premix of air and a gas fuel is supplied from one side of a permeable sheet member (hereinafter referred to as a burner diaphragm) and the mixture is burned in the surface layer portion on the other side of the burner diaphragm, thus heating the surface layer portion itself of the burner diaphrgm and thereby causing it to discharge the radiant heat. Thus, in the surface combustion burner the combustion of the gas is maintained in a condition where a flame is brought into close contact with the surface of the burner diaphragm or entered into the surface layer portion and the radiant heat is radiated from the flame and the burner diaphragm surface layer portion heated to a red-hot condition.
With the conventional surface combustion burners, those of the type in which a porous sintered metal sheet or sintered ceramic sheet is used as the raw material for its burner diaphragm have already been put in practical use in some fields such as cooking utensils and others using a fiber mat composed of metal or ceramic fibers sintered in layer form have been studied vigorously. These surface combustion burners are advantageous in that in addition to the fact that a radiant heat can be obtained with high efficiency, a stable combustion is possible which is not dependent on the external emvironments such as wind and temperature. Particularly, since the burner diaphragm composed of a mat made by sintering stainless steel fibers can be formed to have a complicated surface shape and its strength is excellent and since the realization of a high-porosity structure makes it possible to easily manufacture a burner which is large in area, low in pressure loss, high in combustion degree and high in power output density and which is relatively inexpensive, its application to such uses as a heating apparatus at an outdoor job site and the baking and drying of automobile painting is expected.
FIG. 3 is a schematic diagram showing the construction of an infrared heater used at an outdoor job site as an example of a surface combustion burner apparatus using a burner diaphragm made of stainless steel fiber mat, and its principal part including the burner diaphragm is shown in section.
In FIG. 3, the burner diaphragm m is composed of a stainless steel fiber mat of 5 mm thick made by forming stainless steel (JIS-SUS 316) long fibers of 20 .mu.m in diameter and about 50 mm in length into a mat shape and sintering the long fibers together. With this burner diaphragm m, its surface layer portion ml forms a gas combustion zone during the operation of the apparatus and this gas combustion zone is a radiant heat radiation portion.
Here, a fuel gas supply system including a gas nozzle N, a solenoid valve SV and a fuel gas bomb T and an air supply system including an air blower F are connected to a burner proper K to which the burner diaphragm m is attached. In addition, a spark electrode S for ignition purposes is arranged in opposition to the lower end of the burner diaphrgm m so that when its switch is operated, a controller C not only brings the solenoid valve SV and the blower F into operation but also applies a spike-like
REFERENCES:
patent: 689327 (1901-12-01), Sarafian
patent: 3269449 (1966-08-01), Witten
patent: 3485230 (1969-12-01), Harrington et al.
patent: 3722866 (1973-03-01), Herzberg
patent: 3857669 (1974-12-01), Smith et al.
patent: 4735568 (1988-04-01), Izumisawa et al.
patent: 4766877 (1988-08-01), Jensen
patent: 4977111 (1990-12-01), Tong et al.
Dority Carroll B.
Nippon Kokan Kabushiki Kaisha
LandOfFree
Surface combustion burner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface combustion burner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface combustion burner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2290058