JPH0590115U - Combustion burner of forced vaporization combustion device - Google Patents

Abstract

(57) [Summary] [Purpose] To suppress the generation of offensive odors by burning unburned gas in the combustion burner that causes offensive odors when extinguishing a fire. [Composition] A combustion burner of a forced vaporization type combustion device for combusting vaporized gas injected from a vaporizer, comprising a flame hole network 120
And the back net 130 are formed of a metal net supporting a catalyst for oxidizing unburned gas, and the back net 130
A corrugated portion 131 is formed on the surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a combustion burner used in a forced vaporization combustion device that vaporizes and burns kerosene.

[0002]

[Prior Art]

 A combustion burner of a conventional forced vaporization type combustion device will be described with reference to FIGS. 8 and 9. This type of combustion burner 100 includes a burner top 110, a bottom 150 that is combined with the burner top 110, a partition plate 140 that is sandwiched between the burner top 110 and the bottom 150, and a rectifier that is attached to the partition plate 140. It has a plate 160. The burner top 110 is provided with a flame net 120 having excellent heat resistance and oxidation resistance, and a back net 130 for backfire prevention and static pressure of mixed gas.

[0003]

[Problems to be solved by the device]

 The conventional combustion burner 100 described above has the following problems. That is, when the fire is extinguished, the electromagnetic pump 300 that has pressure-fed kerosene T to the carburetor 200 is stopped, and the convection blower (not shown) is also braked and stopped. Further, the vaporized gas remaining in the combustion burner 100 continues to burn in the combustion burner 100. Moreover, high-pressure residual vaporized gas remains in the vaporizer 200. As the vaporized gas remaining in the combustion burner 100 burns, the pressure of the residual vaporized gas in the vaporizer 200 also decreases, so the injection pressure from the vaporizer 200 also decreases. Along with this, the amount of suction of the primary air also decreases, so the momentum of the combustion flame F in the combustion burner 100 gradually weakens, and the flame resistance between the frame rod 410 and the combustion burner 100 via the combustion flame F. The value will also be higher. When this flame resistance value reaches a preset value, the solenoid needle valve 210 of the carburetor 200 is activated to close the nozzle hole 220 of the carburetor 200 and prevent the release of residual vaporized gas in the carburetor 200. ing. The arrow in FIG. 9 indicates the flow direction of vaporized gas and the like.

On the other hand, in the combustion burner 100, the combustion is stopped by closing the nozzle hole 220 of the carburetor 200, but a very small amount of unburned gas remains in the combustion burner 100, and the unburned gas is 500 The intermediate product of aldehydes is produced by contact with the flame hole network 120 at about 600 ° C, and an offensive odor accompanied by irritation is generated. This is the cause of the offensive odor generated when extinguishing a fire.

The present invention has been made in view of the above circumstances, and combusts unburned gas in the combustion burner that causes an offensive odor generated when extinguishing a fire, thereby suppressing the generation of an offensive odor. An object of the present invention is to provide a combustion burner of a vaporization type combustion device.

[0006]

[Means for Solving the Problems]

 A combustion burner of a forced vaporization type combustion device according to the present invention is a combustion burner of a forced vaporization type combustion device that burns vaporized gas injected from a vaporizer, and at least one of a flame hole network and a back net is not used. It was formed of a metal mesh carrying a catalyst for oxidizing the combustion gas.

A corrugated portion is formed on the back net. Further, a foam metal body may be used instead of the back net.

[0008]

【Example】

 FIG. 1 is a schematic exploded perspective view of a combustion burner of a forced vaporization type combustion apparatus according to a first embodiment of the present invention, FIG. 2 is a plan view of this combustion burner, and FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a sectional view taken along line BB, FIG. 4 is a drawing of the combustion burner according to the second embodiment, and is a sectional view in the same position as FIG. 3, and FIG. FIG. 6 is a cross-sectional view at the same position as in FIG. 3, and FIGS. 6 and 7 are graphs comparing the hydrocarbon concentrations of the combustion burner according to the present invention and the conventional burner. It should be noted that parts that are substantially the same as the conventional ones are given the same reference numerals and will be described.

The combustion burner of the forced vaporization type combustion apparatus according to the first embodiment is a combustion burner of the forced vaporization type combustion apparatus that burns the vaporized gas injected from the vaporizer 200, and includes a flame hole network 120 and a back net. The net 130 is formed of a metal net supporting a catalyst for oxidizing the unburned gas, and the back net 130 has a corrugated portion 131.

Into the long flame hole 111 of the burner top 110, a flame hole net 120 of a Fe—Cr system formed in a convex shape and excellent in heat resistance and oxidation resistance is fitted. This flame hole network 120 carries a catalyst for oxidizing the unburned gas, such as platinum palladium.

A back net 130 may be attached to the inside of the flame hole network 120. The back net 130 is formed with a corrugated portion 131 along the longitudinal direction, and the corrugated portion 131 is adapted to enter the flame hole network 120. The back net 130 also carries the same catalyst as the flame hole network 120. The corrugated portion 131 is used because the contact area is increased and the contact resistance is increased, so that the contact time is lengthened.

Further, a bottom 150 is attached to the burner top 110 via a partition plate 140. The periphery of the partition plate 140, the edge portion 112 of the outer peripheral portion of the burner top 110, and the bottom 150 are curling-joined to form a combustion burner. Incidentally, reference numeral 160 in the drawing is a flow regulating plate, which is installed between the partition plate 140 and the back net 130.

The operation of the combustion burner of the forced vaporization type combustion device configured as described above will be described. The operation of each part at the time of burning and extinguishing the fire is the same as that of the conventional one, and the detailed description thereof is omitted. The unburned gas generated immediately after extinguishing the fire contacts the catalyst whose temperature has been raised to the active temperature by the combustion flame F and is oxidized. That is, this does not generate an intermediate product of aldehydes, which causes an offensive odor accompanied by irritation. As shown in FIGS. 6 and 7, the combustion burner 100 according to the present invention is compared with the conventional burner. Assuming that the total hydrocarbon concentration immediately after extinguishing in the conventional one is 100%, it can be seen that the hydrocarbon concentration in the combustion burner according to the present invention is reduced by about 60%. It was also confirmed by sensory test evaluation that almost no offensive odor was felt. This does not change whether the combustion is strong or weak.

In the above-described embodiment, the catalyst is supported on both the flame net 120 and the back net 130, but the catalyst may be supported on only one of them. Further, although the corrugated portion 131 is formed on the back net 130, the corrugated portion 131 need not be formed as long as a necessary contact area is secured.

Further, in the second embodiment, a foam metal body 170 is used instead of the back net 130 in the first embodiment. A catalyst is also supported on the metal foam body 170. The other parts are the same as those of the combustion burner according to the first embodiment.

[0016]

[Effect of the device]

 Since the combustion burner of the forced vaporization type combustion device according to the present invention is formed of at least one of the flame hole net and the back net by the metal net supporting the catalyst for oxidizing the unburned gas, the cause of the foul odor during extinguishing It is possible to reduce the generation of aldehydes that become Further, when the corrugated portion is formed on the back net, the generation of aldehydes can be suppressed more effectively by increasing the contact area or the like. Further, the same effect can be obtained by using a foam metal body instead of the back net.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a combustion burner of a forced vaporization combustion device according to a first embodiment of the present invention.

FIG. 2 is a plan view of this combustion burner.

3 is a sectional view taken along the line AA and a sectional view taken along the line BB of FIG.

4 is a drawing of a combustion burner according to a second embodiment and is a cross-sectional view at the same position as in FIG.

5 is a drawing of a combustion burner according to a third embodiment and is a cross-sectional view at the same position as in FIG.

FIG. 6 is a graph comparing the hydrocarbon concentration of the combustion burner according to the present invention and the conventional one when the strong combustion is extinguished.

FIG. 7 is a graph comparing the hydrocarbon concentration of the combustion burner according to the present invention and the conventional one when the weak combustion is extinguished.

FIG. 8 is a schematic exploded perspective view of a combustion burner of a conventional forced vaporization combustion device.

FIG. 9 is a schematic configuration diagram of a forced vaporization combustion device of this type.

[Explanation of symbols]

 100 Combustion burner 110 Burner top 120 Flame hole network 130 Back net 131 Corrugated part 170 Foam metal body 200 Vaporizer

Claims (3)

[Scope of utility model registration request] 1. A combustion burner of a forced vaporization type combustion apparatus for burning vaporized gas injected from a vaporizer, a metal carrying a catalyst for oxidizing an unburned gas in at least one of a flame hole network and a back net. A combustion burner for a forced vaporization type combustion device characterized by being formed of a mesh. 2. The combustion burner for a forced vaporization combustion device according to claim 1, wherein the back net is formed with a corrugated portion. 3. A combustion burner for a forced vaporization combustion device, wherein a foam metal body is used instead of the back net according to claim 1.