JPS6026210A - Gas burner - Google Patents

Abstract

PURPOSE:To decrease the size of a device and to decrease a combustion amountwithout lowering combustion performance, by a method wherein a surface combustion device consists of a plurality of burners having a structure like a single burner. CONSTITUTION:When gas is injected toward divided passages 2a and 2b of a mixture pipe 1 through nozzles 7, 7, a primary air is sucked from the opening end of the mixture pipe 1 by means of an injection pressure to mix gas and the air, and the mixture flows in combustion parts 4a and 4b through the divided pipes 2a and 2b and is exhausted through a wire net 4, serving as a combustion surface, for combustion. Burnt combustion gas is raised within an exhaust passage 5 and flows through a catalyst 6, and a most thereof is exhausted to the outside. In which case, when gas is exhausted before burning on the wire net surface of the gas is completed, it is activated when it flows through a catalyst 6 which is increased in temperature by the heat generated during combustion, resulting in complete combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is suitable for use in places where exhaust gas pollution is a problem or where installation space is small, and where there are severe cost constraints or where it is difficult to adjust the amount of combustion. This relates to a burner for gas equipment used as a surface combustion burner required for large widths.

Conventional structure and its problems In conventional surface combustion burners using wire mesh, for example, if the gas supply amount is reduced below a certain limit, the amount of carbon monoxide in the combustion exhaust increases and surface combustion occurs. There is a tendency for the combustion surface temperature to drop too much, making it impossible to obtain the desired performance of the combustion detection sensor.

Therefore, the amount of gas must be adjusted by using a plurality of independent burners to combust and stop each burner, or by increasing or decreasing the number of burners.

As a result, many problems arise, such as an increase in the number of parts used, flame transfer to multiple burners, detection methods and costs for various sensors such as an incomplete combustion sensor, and space occupied by the equipment.

Purpose of the Invention The present invention solves the above-mentioned drawbacks by reducing the number of parts used, configuring a plurality of burner bodies that have a structure similar to a single burner, and reducing the amount of carbon monoxide, nitrogen oxides, etc. in the exhaust gas. The present invention provides a gas burner whose purpose is to reduce

Structure of the Invention In order to achieve the above-mentioned object, the gas burner of the present invention is provided with a partition wall over the entire length of the mixing tube connected to and communicating with the combustion section so as to bisect the cross section of the mixing tube. A divided combustion section is formed between the partition wall and the cylindrical wire mesh by forming a divided passage and extending the partition wall toward the combustion section and surrounding the extended partition wall with a cylindrical wire mesh, and further A gas ejection nozzle is arranged at the inlet of the mixing tube corresponding to each divided passage, and a plate-shaped catalyst body having heat resistance and air permeability is arranged in the exhaust passage of the combustion section. It is composed of

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be explained based on the drawings.
(1) is a mixing tube formed into a vertically elongated elliptical or elliptical cross section, and inside the mixing tube (1) there are 2 parts above and below.
By providing a partition wall (2) over the entire length so as to separate the passages (2a) and (2b), the divided passages (2a) and (2b) are formed.(3)
is a combustion chamber made of a heat-resistant box-shaped frame, and the outlet of the mixing pipe (11) is connected and communicated with the negative side of the combustion chamber, and the partition wall (2) is connected to other parts of the combustion chamber (3). It extends horizontally tC to the side wall surface.

(4) is a cylindrical wire mesh that constitutes the combustion surface, and the combustion chamber (3)
) is arranged so as to surround the partition wall (21), and therefore the inside of this cylindrical wire mesh (4) is surrounded by the partition wall (21).
It is divided into two parts and formed into combustion parts (4a) and (4b) which communicate with the divided passages (2a) and (2b), respectively.

The combustion chamber (3) is formed in a box shape with only the upper part open to reduce the influence of excess air from the outside on the surface of the wire mesh during combustion. A plate-shaped catalyst body (6) made of a porous heat-resistant material is attached, and the open end of the exhaust passage (5) is closed by this catalyst body (6).

(71, (7) is at the inlet end of the mixing tube (1),
This is a gas ejection nozzle facing the open end of each divided passage (2al (2b)).

The effects of the above configuration will be explained below.

Now, when gas is ejected from the nozzles (7) and (71) into the divided passages (2a) and (2+3) of the mixing tube (1), respectively, the ejection pressure causes the primary air to flow from the open end of the mixing tube (1). When the gas and air are mixed, the divided passage (2a)
, (2b) into the combustion sections (4a), (4b), and is discharged from the wire mesh (4) on the combustion surface and burned.

At this time, since the cylindrical wire mesh (4) is divided into two by the partition wall (2), combustion occurs on the wire mesh surfaces corresponding to the respective combustion parts (4a) and (4b).

The combusted exhaust gas rises up the exhaust passage (5), passes through the catalyst body (6), and most of it is discharged to the outside. In this case, if the gas is exhausted without being completely combusted on the surface of the wire mesh, it will be activated when it passes through the catalyst body (6) whose temperature has increased due to the heat generated during combustion, and combustion will be completed.

Note that the divided passages (22) and (2b) in the mixing tube (11) and the divided combustion parts (4a) and (4b) in the cylindrical wire mesh (4) are not necessarily divided into two equal cross-sectional areas by the partition wall (2). There is no need to

Effects of the Invention As described above, according to the gas burner of the present invention, the mixing tube is formed into a divided passage by the partition, and the partition extending from the outlet of the mixing tube is surrounded by a cylindrical wire mesh, so that the partition is formed within the wire mesh. Since the divided combustion sections are formed which communicate with the divided passages through the burners, it is possible to form a plurality of burners with a simple structure using a small number of parts, and the mixing tube is divided into low combustion quantities. Not only is the size of the burner smaller, the overall size is smaller, and it can be provided at a lower cost, but it is also possible to reduce the number of combustion parts in the surface combustion burner without degrading combustion performance, making it easier to install various combustion sensors. Furthermore, even if the amount of gas (it) is extremely reduced, the amount of carbon monoxide contained in the exhaust gas can be almost eliminated.

Further, by disposing a plate-shaped catalyst body having heat resistance and air permeability in the exhaust passage of the combustion section, it is possible to reduce the emission of harmful gases.

Note that the partition wall and the cylindrical wire mesh do not necessarily have to be in close contact with each other, and even if they are separated from each other with a small gap, there is no problem with combustion.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 14 is a simplified longitudinal sectional side view, and FIGS. 2 and 3 are! 2 (A cross-sectional view taken along lines A-A, B-, and B in Figure 1. (1) is the mixing tube, (2) is the partition wall, (' 2
2b) is a divided passage, (3) is a combustion chamber, (4) is a wire mesh,
(4a), (4b) are divided combustion parts, (5) are exhaust passages,
(6) is a catalyst body, and (7) is a gas ejection nozzle.

Claims (1)

[Scope of Claims] ■ A partition wall is disposed along the entire length of the mixing tube connected and communicated with the combustion section side so as to divide the cross section into two, thereby forming a dividing passage within the mixing tube, and the partition wall is connected to the combustion section side. By extending the extended partition wall to the side and surrounding the extended partition wall with a cylindrical wire mesh, a split combustion section that communicates with the divided passage is formed between the partition wall and the cylindrical wire mesh, and furthermore, the inlet portion of the mixing pipe corresponds to each divided passage. A gas burner equipped with a gas jet nozzle. (2) The gas burner according to claim 1, wherein a plate-shaped catalyst body having heat resistance and air permeability is disposed in the exhaust passage of the combustion section.