JPH08170813A - Surface combustion burner device - Google Patents

Abstract

PURPOSE: To prevent a blue flame from being blown off by providing a glowing combustion forming body inside a wind box on the upstream side of a permeable mat so as to form a glowing combustion part in a part of a combusting face on the downstream side of the permeable mat whereon blue flame combustion is made. CONSTITUTION: When a premix of gas and air is introduced from inside of a wind box 4, it flows out from a permeable mat 1 and a blue flame 5 is produced on the surface of the mat 1. On the downstream side of a part inside the wind box 4 wherein a glowing combustion forming body 3 exists, on the other hand, innumerable whirling flows are produced, since outflow of the premix is interrupted by the glowing combustion forming body 3. They form a high-temperature part and make the glowing combustion forming body 3 glow, combusting like glowing combustion flames 2 and forming flames of low load for stabilizing the flame. According to this constitution, the glowing combustion flames of small flow velocity and low load become sources of ignition of the blue flame 5 of high load surrounding them and thereby the blue flame can be prevented from being blown off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface combustion burner device.

[0002]

2. Description of the Related Art As shown in FIG. 1, it is an apparatus for performing surface combustion by causing a premixed gas-air mixture to evenly flow out to the surface of a metal fiber sintered mat or the like.

[0003]

[Problems to be Solved] The above-mentioned conventional combustion device has either a red-heat combustion surface or a blue flame combustion surface formed on the entire downstream combustion surface of the breathable mat. In order to have red-hot combustion on the combustion surface of the blue flame, it was necessary to divide the downstream side of the combustion surface and supply the premixed gas separately.

[0004]

In order to solve the above-mentioned problems, the present invention provides a breathable mat for forming a red hot combustion component on a part of a downstream combustion surface of a breathable mat for performing blue flame combustion. A surface-combustion burner device characterized in that a red-hot combustion forming body is installed in the wind box on the upstream side of.

Further, in order to solve the above-mentioned problems, the present invention provides a surface combustion burner device characterized in that the red heat combustion forming body comprises one or a plurality of heat-resistant flat plates.

In order to solve the above problems, the present invention also provides a surface combustion burner device characterized in that the red-hot combustion forming body is made of punching metal.

[0007]

[Function] When a premixed gas and air mixture is introduced from inside the wind box, the premixed mixture flows out from the breathable mat and generates a blue flame on its surface, but there is a red heat combustion forming body. Since the outflow of the premixed air is blocked by the red-hot combustion forming body on the downstream side of the portion to be heated, innumerable eddy currents are generated on the downstream side of the red-hot combustion forming body, and the high temperature portion is generated. Formed, to make the red-hot combustion forming body red hot,
It burns like a red-hot combustion flame to form a low-load flame holding flame. That is, the low-load red-hot combustion flame having a low flow velocity serves as an ignition source of the surrounding high-load blue flame, and the blow-off of the blue flame can be prevented. When the red-hot combustion forming body is made of punching metal, the pre-mixture is
It flows out by that amount, synergizes with the innumerable eddy currents, forms a good high temperature portion, and maintains flame holding of the blue flame.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 is a breathable mat made of sintered metal fibers or the like. In order to form the red-hot combustion portion 2 on the downstream side of the breathable mat 1, the red-hot combustion forming body 3 is installed in the wind box 4 on the upstream side of the breathable mat 1. The red-hot combustion forming body 3 has a single or plural heat-resistant flat plate shape. The red-hot combustion forming body 3 may also be punching metal.

When a premixed gas and air mixture is introduced from inside the wind box 4, the premixed mixture flows out from the breathable mat 1 and generates a blue flame 5 on its surface, but a red heat combustion formation occurs. On the downstream side of the portion where the body 3 exists, the outflow of the premixed gas is blocked by the red-hot combustion forming body 3,
Innumerable eddies are generated on the downstream side of the red-hot combustion forming body 3 to form a high temperature portion 6, which makes the red-hot combustion forming body 3 red-heat, and even burns like the red-hot combustion flame 2. Form a low-load flame holding flame. That is, the low-load red-hot combustion flame 2 having a small flow velocity serves as an ignition source for the surrounding high-load blue flame 5, and the blue flame 5 can be prevented from being blown off. When the red-hot combustion forming body 3 is formed of punching metal, the premixed gas flows out by that amount, synergizes with the innumerable swirl flow, forms a favorable high temperature portion 6, and sustains flame holding of the blue flame 5. To do.

[0010]

As described above, the present invention has the following effects. Since the red-hot combustion portion having a low flow velocity prevents the surrounding blue flame from being blown off, the amount of combustion per unit area can be increased. Since the burning surface is reinforced by a flat plate or the like, the mechanical strength of the burner increases. By dividing the blue flame by the red hot part, the generation of resonance noise in the furnace caused by uniform surface combustion is avoided.

[Brief description of drawings]

FIG. 1 is an explanatory view of a conventional burner.

FIG. 2 is a perspective explanatory view of a burner of the present invention.

FIG. 3 is a cross-sectional explanatory view showing a combustion state of the present invention.

[Explanation of symbols]

 1 Breathable mat 2 Red-hot combustion flame 3 Red-heat combustion forming body 4 Wind box 5 Blue frame 6 High temperature part

Claims (3)

[Claims] 1. A red-hot combustion forming device is provided in a wind box on the upstream side of the breathable mat to form a red-hot burning portion on a part of the downstream burning surface of the breathable mat that performs blue flame burning. A surface combustion burner device characterized by the above. 2. The surface combustion burner device according to claim 1, wherein the red-hot combustion forming body is a heat-resistant single or plural flat plate-like material. 3. The surface combustion burner apparatus according to claim 1, wherein the red-hot combustion forming body is made of punching metal.