JP2002022145A - Burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner which generates little NOX in high temperature combustion and also little CO in red flame combustion by employing no burner tiles for a chamber wall. SOLUTION: The burner comprises a chamber wall made of a heat-resistant metal material and air is preheated in an air channel on the outer periphery thereof, so that the air is sufficiently raised in temperature to generate little NOX in high temperature combustion and little CO in red flame combustion. In addition, the chamber wall is cooled by the air channel formed on the outer periphery thereof, so that it is possible to employ the heat-resistant metal material instead of the burner tiles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner which does not use a burner tile on a wall of a combustion chamber.

[0002]

2. Description of the Related Art In a conventional burner, a burner tile is used for a chamber wall of a combustion chamber, so that a large amount of NOX is generated by high-temperature combustion, while a large amount of CO is generated by red-fire combustion.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and eliminates the use of burner tiles for the chamber walls, thereby reducing the generation of NOX in high-temperature combustion and reducing the generation of CO in red-fire combustion. For the purpose of providing.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a chamber wall made of a refractory metal material of a combustion chamber, an air passage formed on an outer periphery of the chamber wall, and a preheated air passage in the air passage. The present invention proposes a burner including air supplied to a combustion chamber and gas burned in the combustion chamber by the air.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A burner according to the present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 shows a burner according to the invention, which has a combustion chamber (4) provided with a gas nozzle (3) and an air outlet (9). The chamber wall (5) of the combustion chamber (4) is formed of a heat-resistant metal material such as stainless steel. Next, double air passages (8a) and (8b) are provided on the outer periphery of the chamber wall (5).
Is provided as an air passage from the air supply source A to the air outlet (9). Next, the gas nozzle (3) is connected to the gas supply source G via the gas path (2), so that the high temperature combustion nozzle and the red fire combustion nozzle can be easily replaced. The operation of the burner of the present invention shown in the above embodiment is as follows. That is, the gas from the gas nozzle (3) and the air from the air outlet (9) burn in the combustion chamber (4). The heat of the combustion chamber (4) passes through the air passages (8a) (8) through the chamber wall (5) made of a refractory metal material.
b), so that the air rises in temperature. Conversely, since the chamber wall (5) is cooled by air, a heat-resistant metal material that is not a burner tile can sufficiently withstand it. As described above, since the air whose temperature has risen is used for combustion, generation of NOX is small even in high-temperature combustion. That is, the measured values in the examples were 150 ppm at 1350 ° C and 1000 ° C.
And the NOx value was 80 ppm or less, which was 1/3 to 1/2 that of a normal burner using a burner tile.
Next, in the case of burning with red fire, the air whose temperature has risen is used for combustion, so that the mixture becomes almost completely mixed and the generation of CO is small. That is, as a measured value of the example, CO was zero ppm in the combustion in which the remaining O ₂ was 2 to 3%.

[0006]

The embodiments of the burner according to the present invention are as described above, and the effects are listed below. (1) In the burner of the present invention, in particular, the chamber wall is made of a heat-resistant metal material, and the air is preheated in an air passage around the chamber wall. (2) In the burner of the present invention, in particular, the room wall is made of a heat-resistant metal material, and the air is preheated in the air passage on the outer periphery thereof. (3) In the burner of the present invention, since the air path is particularly formed on the outer periphery of the chamber wall, the chamber wall is cooled, and a heat-resistant metal material can be used instead of the burner tile. (4) Since the burner of the present invention uses a heat-resistant metal material instead of the burner tile especially for the room wall, it can be easily replaced in the case of breakage or the like.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a burner of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Gas path 3 Gas nozzle 4 Combustion chamber 5 Room wall 8a Air path 8b Air path 9 Air outlet G Gas supply source A Air supply source

Claims (1)

[Claims] 1. A chamber wall made of a refractory metal material of a combustion chamber, an air passage formed on an outer periphery of the chamber wall, air preheated in the air passage and supplied to the combustion chamber, and the combustion chamber is provided by the air. Burner composed of gas burned in