JP3685554B2 - Original mixed surface flame type burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an original mixed type planar flame type burner.
[0002]
[Prior art]
As an original mixed type planar flame type burner, for example, an original mixed type planar flame type burner 100B having a structure shown in FIG. 2 is known. In FIG. 2, a portion indicated by a thick line is a thick portion of the constituent member, which is generally a portion made of a heat-resistant metal material, such as a stainless steel plate, and the hatched portion allows the mixed gas to pass therethrough. It is the cross-sectional part of the combustion plate 1 which has many guide holes 1A for this purpose.
[0003]
In other words, in this burner, a mixed gas G1 of fuel gas and air containing oxygen in an amount necessary for combustion of the fuel gas is supplied to the mixed gas chamber 2 on the back side of the combustion plate 1 to provide a large number of guides. It is structured to pass through the hole 1A and burn by forming a flat flame G2 on the outer combustion surface 1B.
[0004]
The combustion plate 1 in this case is mainly formed of a thick plate-like refractory material, for example, a ceramic fiber or the like provided with a large number of fine guide holes 1A as shown in the figure.
[0005]
Planar-flame burner having the above structure, since faster completion of combustion in comparison with the single nozzle type burner previously mixing type, can be reduced generation amount of NO _X, the size of the apparatus because the flame G2 does not increase can be achieved , Etc., and 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-mentioned original mixed type planar flame type burner, when the guide hole 1A becomes too large due to the aging of the combustion plate 1, the flame enters the mixed gas chamber 2 and the entire mixed gas chamber is mixed. Since the so-called explosion, in which the gas burns at once, is dangerous, it is necessary to prevent backfire, and the solution to this point has been a problem.
[0007]
[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. An original mixed type planar flame type provided with a multi-hole combustion plate which is disposed facing the chamber and through which the mixed gas supplied from the mixed gas chamber passes and forms a flame on the surface opposite to the mixed gas chamber In the burner
[0008]
A multi-hole plate-like member formed so that the mixed gas can pass is installed close to the combustion plate from the side of the mixed gas chamber, and a pressure sensor is installed between the combustion plate and the plate-like multi-hole member . An original mixed planar flame burner of the first configuration;
[0009]
In the original mixed planar flame burner of the first configuration, the original mixed planar flame burner of the second configuration in which the gap between the combustion plate and the plate-like multi-hole member is 2 to 50 mm; ,
[0011]
In the first or original-mix planar-flame burner of the second configuration, upon detection of a pressure by the pressure sensor Ru beyond the pressure Jo Tokoro, fuel stops supplying the fuel gas to the mixed gas chamber An original mixed planar flame burner of a third configuration in which a shut-off device is installed;
[0012]
In the original mixed planar flame burner of the third configuration, the safety device operates to display the operation of the fuel shut-off device when the fuel shut-off device stops supplying the fuel gas based on the information output from the pressure sensor. An original mixed surface flame type burner having a fourth configuration in which an indicator is installed;
By providing the above, the problems of the prior art are solved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. In order to facilitate understanding, in FIG. 1 as well, parts having the same functions as those described with reference to FIG.
[0014]
In the original mixed surface flame type burner 100 having the configuration shown in FIG. 1, a punching metal 3 having a large number of vent holes 3 </ b> A is attached to the inner surface side of the combustion plate 1, and further, the combustion plate 1 and the punching metal 3 are provided. is interposed a sensor 4 capable of detecting pressure between.
[0015]
Then, the sensor 4 and the controller 5 also connects the on-off valve 6 and the safety device operation display 7 as a control unit 5 and the fuel cutoff device can communicate sensor 4 Jo Tokoro pressure (for example, When a pressure increase exceeding 50 kPa) is detected, the on-off valve 6 is closed to urgently stop the supply of the mixed gas G1 to the mixed gas chamber 2, and the safety device operation indicator 7 is operated to operate the on-off valve 6 Configure to let you know.
[0016]
The punching metal 3 has a heat capacity of, for example, a heat-resistant stainless steel plate having a vent hole 3A having a diameter of about 3 to 10 mm and a density of about 40 to 400/100 cm ² while slightly shifting the position of the vent holes 3A. For example, 2 to 5 sheets are stacked so as to be large.
[0017]
By installing this punching metal 3, even if the flame G2 enters the back side of the combustion plate 1 due to an increase in the guide hole 1A of the combustion plate 1, the mixed gas G1 in the mixed gas chamber 2 is ignited. Before the explosion, the punching metal 3 having a large heat capacity and good thermal conductivity can quickly extinguish the heat of the flame and extinguish the fire.
[0018]
When a small amount of mixed gas G1 between the combustion plate 1 and the punching metal 3 is explosively burned by the flame G2 entering the back side of the combustion plate 1, this phenomenon is detected by the sensor 4.
[0019]
That is, when a small amount of the mixed gas G1 between the combustion plate 1 and the punching metal 3 burns explosively, the temperature and pressure rapidly increase and are detected by the sensor 4. The on / off valve 6 is operated based on the information output from the sensor 4, the supply of the mixed gas G 1 to the mixed gas chamber 2 is stopped, and the fact that the on / off valve 6 has been operated is a safety device operation indicator 7. Is displayed.
[0020]
Therefore, not only ignition / explosion of the mixed gas G1 in the wide mixed gas chamber 2 can be prevented, but also the damaged combustion plate 1 can be repaired.
[0021]
In place of the punching metal 3, the fire extinguishing action similar to that of the punching metal 3 can be obtained by arranging about 4 to 5 metal meshes of about 100 mesh.
[0022]
Further, instead of the punching metal 3, a multi-hole ceramic plate may be arranged. Ceramics has a lower thermal conductivity than metal, so it does not have a strong fire extinguishing action like a metal plate, but the fire extinguishing action is strengthened when the plate thickness is increased.
[0023]
In addition, since the ceramic plate having many vent holes 3A having a diameter of about 1 to 2 mm has a flame holding action, the flame G2 does not enter the mixed gas chamber 2 even when the fire cannot be extinguished, and the flame is maintained on the surface of the ceramic plate. Is done.
[0024]
Even when the flame is held by the ceramic plate attached to the inside of the combustion plate 1 in this way, the combustion of a small amount of the mixed gas G1 between the combustion plate 1 and the ceramic plate is detected by the sensor 4, The on-off valve 6 is operated based on the information output from the sensor 4, the supply of the mixed gas G1 to the mixed gas chamber 2 is stopped, the fire is extinguished, and the on-off valve 6 is operated to display the safety device operation indication. Displayed by the device 7.
[0025]
The plate-like multi-hole member such as the punching metal 3 is preferably installed 2 to 50 mm away from the combustion plate 1. That is, the separation distance is not less than a dimension that can secure a space for mounting the sensor 4. On the other hand, when the separation distance is increased, not only the apparatus is enlarged, but also the amount of the mixed gas G1 between the plate-like multi-hole member and the combustion plate 1 is increased, and the mixed gas G1 in this portion is ignited. Since the destructive force becomes excessively large and each part is damaged, the plate-like multi-hole member such as the punching metal 3 and the combustion plate 1 are usually set apart by about 2 to 50 mm.
[0026]
Further, as a ceramic plate for forming a plate-like multi-hole member attached to the inside of the combustion plate 1, powders of Al ₂ O ₃ , SiO ₂ , TiO ₂ , ZrO ₂ , MgO or the like may be used alone or appropriately mixed. Can be formed.
[0027]
In addition, since this invention is not limited to the said embodiment, various deformation | transformation implementation is possible in the range which does not deviate from the meaning as described in a claim.
[0028]
For example, the on-off valve 6 for urgently stopping combustion when an abnormality occurs may be installed in a passage of only fuel gas (not shown).
[0029]
【The invention's effect】
As explained above, according to the original mixed surface flame type burner according to the present invention, there is no danger of explosion due to flashback. In addition , it is possible to detect when a small amount of mixed gas between the combustion plate and the plate-like multi-hole member burns by flashback, and further, the supply of fuel gas is urgently stopped to ensure safety, and the fuel Since it can be seen that the emergency supply has been urgently stopped, measures such as repairs can be taken promptly.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an embodiment.
FIG. 2 is an explanatory diagram of a prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combustion plate 1A Lead hole 1B Combustion surface 2 Mixed gas chamber 3 Punching metal 3A Vent hole 4 Sensor 5 Control device 6 On-off valve 7 Safety device operation indicator 11 Fuel gas 12 Air 100 Original mixed surface flame type burner

Claims (4)

A mixed gas chamber to which a fuel gas and air containing an amount of oxygen necessary for the combustion of the fuel gas are supplied, and a mixed gas supplied from the mixed gas chamber is disposed to face the mixed gas chamber An original mixed surface flame type burner equipped with a multi-hole combustion plate that forms a flame on the surface opposite to the mixed gas chamber,
A multi-hole plate-like member formed so that the mixed gas can pass is installed close to the combustion plate from the side of the mixed gas chamber, and a pressure sensor is installed between the combustion plate and the plate-like multi-hole member. Original mixed surface flame type burner.   2. The original mixed planar flame burner according to claim 1, wherein a gap between the combustion plate and the plate-like multi-hole member is 2 to 50 mm. When the pressure sensor detects a pressure which Ru beyond the pressure Jo Tokoro, according to claim 1 or 2, wherein the original fuel shut-off device for stopping the supply of fuel gas to the gas mixture chamber, characterized in that the installed Mixed surface flame burner. When the fuel cut-off device based on the information that the pressure sensor output to stop the supply of the fuel gas, the safety device actuation indicator for indicating the operation of the fuel shut-off device according to claim 3, characterized in that it is installed Original mixed surface flame type burner.

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