JP3702059B2 - Original mixed surface flame burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an original mixing type planar flame burner used also as a heating means of a high-temperature regenerator in an absorption refrigerator.
[0002]
[Prior art]
As an original mixed type planar flame type burner, for example, an original mixed type planar flame type burner 100X having a structure shown in FIG. 3 is known.
[0003]
That is, in the original mixed surface flame type burner 100X, the fuel gas and the air containing the amount of oxygen necessary for combustion of the fuel gas are stirred and mixed by the venturi mixer 8 and supplied to the mixed gas chamber 2. Then, the mixed gas that has passed through innumerable combustion holes (not shown) of the combustion plate 1 installed facing the mixed gas chamber is configured to burn by forming a strip-shaped flame 15 on the surface of the combustion plate 1. .
[0004]
The combustion plate 1 is formed by opening a large number of minute combustion holes (not shown) having a diameter of about 1 to 2 mm after sintering an appropriate fire-resistant material, for example, metal fiber, in a state where it can be vented. There is usually a plate thickness of about 2 to 4 mm.
[0005]
The original mixing type planar flame type burner having the above-described configuration is faster in completion of combustion than the pre-mixing type single nozzle type burner, so the generation amount of NO _x can be reduced, and the flame does not become longer, so the heated side device There are various advantages such as being able to reduce the size of the apparatus, and it has come to be used as a heating device for a high-temperature regenerator in an absorption refrigerator.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional original mixed planar flame type burner, when excessive air combustion is promoted in order to increase heating efficiency and further reduce NO _x , for example, 0. The flame, which was stably formed about 5 to 2 mm apart, was further separated from the combustion plate, and the flame could blow off at once.
[0007]
Therefore, it is necessary to make it possible to perform more excessive air combustion so that the flame lift phenomenon is less likely to occur, the heating efficiency is increased, and NO _X can be further reduced. It was.
[0008]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems of the prior art, and a mixed gas chamber to which a fuel gas and air containing an amount of oxygen necessary for combustion of the fuel gas are supplied, and the mixed gas chamber are provided. An original mixed surface formed with a combustion plate provided with a number of combustion holes that are arranged to face and through which the mixed gas in the mixed gas chamber passes and forms a flame on the surface opposite to the mixed gas chamber In a flame flame burner,
[0009]
The mixed gas chamber is divided into two inner and outer chambers at positions corresponding to the outer peripheral portion and the inner peripheral portion of the combustion plate, and each of the inner mixed gas chamber and the outer peripheral mixed gas chamber divided into the inner and outer two chambers. the first and the original mixed type planar-flame burner configuration to so that provided a rectifying plate,
[0010]
In the first original-mix planar-flame burner configuration, mixing of straightening vanes mixed gas passage resistance of the current plate provided inside the inner-side gas mixture chamber, provided inside the outer peripheral side gas mixture chamber a second source-mixed planar-flame burner configuration you so that be less than the gas passing resistance,
[0011]
Air containing in the first or the original mixed type planar-flame burner of the second configuration, the inner-side gas mixture chamber, each outer peripheral side gas mixture chamber, the amount of oxygen required for combustion of the fuel gas and the fuel gas An original mixed surface flame type burner having a third configuration in which a supply port is provided for supplying
[0012]
In the first to three yuan-mix planar-flame burner of any configuration, the width facing the outer peripheral side gas mixture chamber of the combustion plate on 10mm or more, of the fourth configuration as is 50mm or less Original mixed surface flame type burner,
By providing the above, the problems of the prior art are solved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. In order to facilitate understanding, in these drawings, the same reference numerals are given to portions having the same functions as those described in FIG.
[0014]
The original mixed planar flame type burner 100 according to the present invention has a mixed gas chamber 2 in which a combustion plate 1 is disposed on the front surface inside and outside by a partition wall 3, that is, an inner mixed gas chamber 4 and an outer peripheral mixed gas chamber 5. It is divided into
[0015]
Further, in each of the inner mixed gas chamber 4 and the outer peripheral mixed gas chamber 5, the rectifying plates 6 and 7 are installed on the upstream side of the combustion plate 1 and separated from the combustion plate 1 by about 10 to 20 mm, for example. 5 is divided into an upstream side 4A and a downstream side 4B, and an upstream side 5A and a downstream side 5B.
[0016]
The rectifying plate 6 installed in the inner mixed gas chamber 4 is a punching metal in which small holes 6a having a diameter of, for example, about 1 to 2 mm are uniformly distributed on a stainless steel plate having a thickness of, for example, 1 mm. On the other hand, the rectifying plate 7 installed in the outer peripheral side mixed gas chamber 5 has a small hole 7a smaller in diameter than the small hole 6a, for example, in a stainless steel plate having a thickness of 1 mm so that the passage resistance of the mixed gas is larger than that of the rectifying plate 6. The small holes having the same diameter as the small holes 6a are provided with a smaller distribution density than the small holes 6a.
[0017]
Then, on the back surfaces of the upstream side 4A of the inner mixed gas chamber 4 and the upstream side 5A of the outer peripheral side mixed gas chamber 5, a mixed gas supply pipe 9 provided with a large venturi mixer 8 and a small venturi mixer 10 were provided. A mixed gas supply pipe 11 is connected.
[0018]
Further, 12 is a blower, and 13 and 14 are an on-off valve and a flow rate adjusting valve, respectively, and the ratio of fuel gas is higher in the upstream side 5A of the outer peripheral side mixed gas chamber 5 than in the upstream side 4A of the inner mixed gas chamber 4. A mixed gas is supplied.
[0019]
Accordingly, in the original mixed planar flame burner 100 having the above-described configuration, the mixed gas supplied to the upstream side 5A of the outer peripheral side mixed gas chamber 5 and flowing into the downstream side 5B is upstream of the inner mixed gas chamber 4. Since the amount of fuel gas is smaller than that of the mixed gas supplied to the side 4A and flows into the downstream side 4B, and the ratio of the fuel gas is high, the lift amount of the flame 15 formed on the surface of the combustion plate 1 is kept small at the periphery. the improvement of heating efficiency, be carried out in the central portion of the NO _X combustion plate 1 effective excess air combustion to reduce, the flame 15 is difficult to lift, thus hardly blowout.
[0020]
The width of the outer peripheral side mixed gas chamber 5 is at least 10 mm in order to suppress the lift phenomenon in the peripheral portion of the flame 15 formed on the surface of the combustion plate 1, but if it is too wide, the overall thermal power is reduced. Since it decreases, the maximum is 50 mm or less.
[0021]
By the way, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit described in the claims.
[0022]
For example, the rectifying plates 6 and 7 may be formed of a single rectifying plate, and the inner mixed gas chamber 4 and the outer peripheral mixed gas chamber 5 may be formed by disposing the partition walls 3 on both sides of the single rectifying plate. good.
[0023]
Further, the supply amount of the mixed gas to the outer peripheral side mixed gas chamber 5 may be made smaller than that to the inner mixed gas chamber 4 to suppress the lift phenomenon around the flame 15.
[0024]
【The invention's effect】
As described above, in the former mixing formula planar flame burner according to the present invention, since hardly occurs lift phenomenon of flame, and improvement of heating efficiency by performing the further excess air combustion, further reduction of the NO _X Can be achieved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.
FIG. 2 is an explanatory view of an embodiment as viewed from the front.
FIG. 3 is an explanatory diagram showing a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combustion plate 2 Mixed gas chamber 3 Partition 4 Inner mixed gas chamber 4A Upstream side 4B Downstream side 5 Outer peripheral side mixed gas chamber 5A Upstream side 5B Downstream side 6 Rectifier plate 6a Small hole 7 Rectifier plate 7a Small hole 8 9 Mixed Gas Supply Pipe 10 (Small) Venturi Mixer 11 Mixed Gas Supply Pipe 12 Blower 13 On-off Valve 14 Flow Control Valve 15 Flame 100 Original Mixed Surface Flame Burner

Claims (4)

A mixed gas chamber to which fuel gas and air containing oxygen necessary for combustion of the fuel gas are supplied, and a mixed gas chamber disposed so as to face the mixed gas chamber through which the mixed gas passes. An original mixed surface flame type burner formed with a combustion plate having a number of combustion holes formed on the opposite surface to which a flame is formed,
The mixed gas chamber is divided into an inner and outer two chambers at positions corresponding to the outer peripheral portion and the inner portion of the combustion plate, and each of the inner mixed gas chamber and the outer peripheral mixed gas chamber divided into the inner and outer two chambers. An original mixed surface flame type burner characterized in that a current plate is provided . The mixed gas passage resistance of the current plate provided inside the inner-side gas mixture chamber, according to claim 1, characterized in that less than a mixed gas passage resistance of the current plate provided inside the outer peripheral side gas mixture chamber Original mixed surface flame type burner. Inner side gas mixture chamber, each outer peripheral side gas mixture chamber, according to claim 1 or, characterized in that a supply port for supplying the air containing oxygen of the fuel gas and the amount required for combustion of the fuel gas 2. The original mixed surface flame type burner according to 2. Outer circumferential side mixing width facing the gas chamber 10mm than the original mixed type planar-flame burner according to any one of claims 1 to 3, characterized in that a 50mm below the combustion plate.

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