WO2013055160A1

WO2013055160A1 - Flame hole unit structure of pre-mixed gas burner

Info

Publication number: WO2013055160A1
Application number: PCT/KR2012/008335
Authority: WO
Inventors: 민태식
Original assignee: 주식회사 경동나비엔
Priority date: 2011-10-14
Filing date: 2012-10-12
Publication date: 2013-04-18
Also published as: KR20130040447A; KR101291627B1

Abstract

The object of the present invention is to provide a flame hole unit structure of a pre-mixed gas burner, wherein a plurality of punching plates can be manufactured relatively easily and are stacked such that various shapes of flame holes are implemented in a three-dimensional manner whereby a pre-mixed gas burner can stably maintain flames in the wide range of operation and prevent combustion noise, and further, the pre-mixed gas burner is easily manufactured. To achieve this objective, the present invention provides a flame hole unit structure of a pre-mixed gas burner having a plurality of flame holes through which mixed gas of gas and air is sprayed to form flames, wherein: a plurality of flame hole plates are punched such that holes of a certain shape are arranged in predetermined patterns; and said plurality of the flame hole plates are stacked to form flame holes of different sizes and shapes.

Description

Flame study structure of premixed gas burner

The present invention relates to a salt spray structure used in a premixed gas burner, and more particularly, has a plurality of salt hole plates arranged in a predetermined pattern of holes of various sizes and shapes, and by stacking the salt hole plates, It relates to a salt structure of the pre-mixed gas burner to form a salt hole of the shape.

In general, a gas burner used in a combustion device such as a boiler or a water heater may be classified into a Bunsen burner and a pre-mixed burner according to a method of mixing combustion gas and air.

The Bunsen burner is a burner that supplies the minimum primary air necessary for combustion from the nozzle injecting the gas and supplies the excess secondary air to the part where the flame is formed to realize complete combustion. On the other hand, since the flame is formed by secondary air, the flame length is long, the flame temperature is high, and the amount of air required for combustion requires much more air than the theoretical air volume. Therefore, the heat loss amount and the emissions of pollutants due to the discharge of the high temperature exhaust gas has a disadvantage in that there is a certain limit to maximize the efficiency of gas combustion equipment and reduce the pollutants.

On the other hand, the premix burner burns the premixed gas premixed with the combustion gas and air in the mixing chamber, reducing the overall flame length and lowering the flame temperature, thereby reducing the load on the same area. And it has the advantage of reducing the generation of pollutants such as nitrogen oxide to a minimum.

Conventionally, Bunsen burners are mainly used, but recently, premixed burners are mainly used to reduce the generation of pollutants and to downsize the combustion chamber.

1 is a perspective view showing an example of the salt structure of the conventional premixed gas burner, Figure 2 is a plan view showing a stainless perforated plate used in the conventional premixed gas burner.

In the conventional premixed gas burner 1, when the blower 40 is operated, the air introduced through the air inlet 21 and the gas introduced through the gas inlet 22 are mixed in the intake pipe 30. Pre-mixed in the pre-mixer chamber 50 via the blower 40 is composed of a structure that is supplied to the burner flame hole 10 provided on the upper side of the burner.

The burner flame hole 10 is provided with a salt hole plate. As the salt hole plate, stainless perforated plates, metal fibers, ceramics, and the like are used.

2 shows an example of a salt hole plate made of a stainless perforated plate. The salt plate (11) was used as a structure in which the salt hole (11a) perforated in one plate, but vulnerable to noise, or burner combustion surface is deformed due to thermal stress or, in severe cases, the salt hole is damaged, causing incomplete combustion and backfire. Therefore, there is a problem that the combustion load range is narrowed. In addition, the stainless perforated plate is to make a salt hole shape by the press mold has a problem that the salt hole shape is difficult to create a simple and three-dimensional shape.

To compensate for these drawbacks, a burner flame-retardant structure using metal fibers woven from metal fibers or ceramic plates manufactured by sintering ceramics was used, but the manufacturing cost was increased due to high material costs and inconvenient manufacturing methods. There is this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and by stacking a plurality of perforated plates, which are relatively easy to manufacture, three-dimensional salt hole shapes can be realized in three dimensions, and thus the premixed gas burner can be used in a wide operating range. The purpose of the present invention is to provide a flame-retardant structure of the premixed gas burner that can stably maintain flames, prevent combustion noise, and can be easily manufactured.

The salt-coated structure of the present invention for achieving the above object, in the salt-coated structure of the pre-mixed gas burner is provided with a plurality of salt holes in which a mixture of gas and air is injected to form a flame, holes of a certain shape A plurality of salt hole plates perforated to be arranged in a pattern is provided; The plurality of salt holes plate is laminated, characterized in that the salt holes having different sizes and shapes are formed.

In this case, the holes may consist of circular or elliptical shapes.

In addition, the holes formed in each of the salt hole plate, it can be configured to form a hexagonal shape surrounded by six holes around one hole formed in the center.

In addition, the plurality of salt plate may be stacked to overlap at different angles.

In addition, when the plurality of salt hole plates overlap each other, it may be configured to be formed so that the salt holes of different sizes and shapes are arranged in a predetermined pattern.

In addition, the salt hole plate may be composed of any one of a flat plate, a curved plate, a hemispherical plate, and a cylindrical plate.

According to the salt structure of the premixed gas burner of the present invention, it is easy to manufacture by using a perforated plate plate manufactured by a press method, and by stacking a plurality of such plates at different angles, the salt holes having various sizes and shapes are uniform. The pattern can be implemented to maintain the flame stably in a wide operating range, and has the advantage of reducing the noise generated during combustion compared to using a single perforated plate.

1 is a perspective view showing an example of the salt structure of the conventional premixed gas burner

Figure 2 is a plan view showing a stainless perforated plate used in a conventional premixed gas burner

Figure 3 is a plan view showing a salt hole plate is arranged in a uniform form of circular perforated holes according to an embodiment of the present invention

Figure 4 is a plan view showing a state in which two sheets of salt flat plate of Figure 3 stacked at right angles to each other

FIG. 5 is a plan view illustrating a state in which the angle between two sheets of the salt flat plate of FIG.

FIG. 6 is a plan view illustrating a state in which the angles between the three salt plates of FIG. 3 are inclined so that the angle is 30 degrees and 90 degrees.

FIG. 7 is a plan view showing a state in which two oval hole plates are arranged at right angles to each other in an elliptical perforated hole according to another embodiment of the present invention.

8 is a view showing various burner shapes to which the salt hole plate of the present invention is applied;

** Explanation of Codes **

1: burner 10: flame

21: air inlet 22: gas inlet

30: intake pipe 40: blower

50: premixed chamber 100,200,300: round flame plate

400,500: Oval salted plate

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the premixed gas burner of the present invention, the air is sucked through the air inlet 21 by the blower 40, and the gas is sucked through the gas inlet 22 by the blower 40 and the gas pressure. Air and gas are mixed while passing through the intake pipe 30 and the blower 40 to reach the premixer chamber 50, and then completely mixed, and then the mixer is ejected through the salt holes of the salting plate to form a flame. Same as the structure shown in 1.

The present invention is characterized in that the salt holes formed in the salt hole plate and the salt holes of various shapes can be easily formed by stacking a plurality of salt hole plates. Thus, the salt of the present invention with reference to FIGS. Describe the study structure.

FIG. 3 is a plan view showing a salt hole plate in which circular perforated holes are arranged in a constant shape according to an embodiment of the present invention.

The salt hole plate 100 of the present invention may be formed by punching circular holes 101 to 107 in a flat plate by press working.

The holes 101 to 107 are preferably arranged in a constant direction. As shown in FIG. 3, six

holes

102, 103, 104, 105, 106, and 107 surround a single hole 101 formed at the center thereof to form a hexagon. The six

holes

102, 103, 104, 105, 106, and 107 form a vertex of a hexagon.

As the holes forming the vertices of the hexagon are repeatedly arranged as described above, the hole 101 disposed in the center also forms one vertex of the neighboring hexagon.

Preferably, the holes 101 to 107 have a diameter of about 0.5 to 3 mm.

In FIG. 3, the holes 101 to 107 are formed in a circular shape, but may also be configured as an ellipse or another shape.

Figure 4 is a plan view showing a state in which two sheets of salt flat plate of Figure 3 stacked at right angles to each other.

Referring to FIG. 4, two

salt plates

100 and 200 are arranged to overlap each other in a stacked state to form salt holes, one salt plate 100 in a horizontal direction, and another salt plate 200 in a vertical direction. Each of them is arranged in a direction perpendicular to each other, it is possible to form salt holes of various sizes and shapes by forming a salt hole in the overlapping portion of them.

The heating system is operated under various load conditions, in which the mixing ratio of air and gas and the flow rate of the mixer have to be changed. In this case, when the mixing ratio and the flow rate of the mixer are changed, the flame of the premixed gas burner becomes unstable, and combustion performance may be reduced or combustion noise may be generated. Therefore, as the present invention, when the salt holes having different sizes and shapes are formed by overlapping a plurality of salt plates, the flame shape can be made into the main flame and the auxiliary flame, so that the flame can be stably maintained even if the mixing ratio and the flow rate of the mixer are changed. This enables stable operation under various operating conditions.

In FIG. 4, the salt holes of different sizes and shapes are repeatedly formed while having a predetermined pattern by adjusting the hole sizes and the gaps between the holes of the

salt plates

100 and 200, but an irregular pattern is formed even though the pattern is not necessarily a regular pattern. It can also be configured as.

FIG. 5 is a plan view illustrating a state in which the angles between two sheets of the salt flat plates of FIG. 3 are inclined so as to be 30 degrees and stacked.

FIG. 5 illustrates a state in which a salt hole array having a different shape from that of FIG. 4 is implemented by stacking the angle plates between two

sheets

100 and 200 of FIG. 3 such that the angle is 30 degrees.

In the case of FIG. 5, only two overlapping portions of the salt

flat plates

100 and 200 overlap each other to form a salt hole, and the salt holes having different sizes and shapes are repeatedly formed while having a predetermined pattern. Even if it is not a pattern, an irregular pattern may be formed.

FIG. 6 is a plan view illustrating a state in which the angles between the three salt plate plates of FIG. 3 are inclined so as to be 30 degrees and 90 degrees, and are stacked.

FIG. 6 illustrates a state in which another arrangement of the salt holes is implemented by stacking the

salt plates

3, 100, 200, and 300 at right angles and 30 degrees in FIG. 3.

In the case of FIG. 6, only the portions (dotted regions) in which the three

salt plates

100, 200 and 300 overlap each other and overlap each other form a salt hole, and the salt holes having different sizes and shapes are repeatedly formed while having a predetermined pattern. In addition, it may be configured that an irregular pattern is formed even though it is not necessarily a constant pattern.

When the plurality of salt hole plates (100, 200, 300) is configured as described above, the positions of the holes formed in each of the stacked salt hole plates (100, 200, 300) are formed to be slightly shifted from each other. When viewed in a cross-sectional view from the side direction, the flow path through which the gas and air mixers pass is positioned so that the holes of the upper and lower plates are shifted from each other, thereby forming a salt hole in a three-dimensional shape. Therefore, it is possible to reduce the generation of noise, and to prevent the combustion surface from being deformed or damaged by the thermal stress, thereby preventing the occurrence of incomplete combustion and backfire.

FIG. 7 is a plan view showing a state in which two salt plates having elliptical perforated holes arranged in a predetermined shape are stacked at right angles to each other according to another embodiment of the present invention.

4 to 6 illustrates the case where the holes formed in each plate are circular, but in the case of FIG. 7, the two

salt holes

400 and 500 have elliptical holes formed at a constant size and spacing. When the

plates

400 and 500 are stacked in a direction perpendicular to each other, salt holes having different sizes and shapes are formed in a predetermined pattern or an irregular pattern.

In addition, in the above it is configured to stack each plate at a different angle, but if the position of the hole to be perforated in each plate is formed in a different position it is possible to implement salt holes of different sizes and shapes even if stacked at the same angle .

8 is a view showing various burner shapes to which the salt hole plate of the present invention is applied.

As shown in FIG. 8, the salt hole structure of the present invention in which a plurality of salt hole plates are stacked may be molded and used in a flat plate shape, a curved shape, a hemispherical shape, and a cylindrical shape.

The salt hole plate of the present invention as described above can be easily manufactured by press working, and since the salt holes of various sizes and shapes are realized by stacking a plurality of such plates, the salt hole is suitable for a variety of operating conditions while the manufacturing cost is low. The structure is simple to implement.

Claims

In the salt hole structure of the pre-mixed gas burner provided with a plurality of salt holes in which the gas and air mixed gas is injected to form a flame,

A plurality of salt hole plates are provided so that holes of a predetermined shape are arranged in a predetermined pattern;

The salt hole structure of the pre-mixed gas burner, characterized in that the plurality of salt hole plate is stacked to form salt holes having different sizes and shapes.
The method of claim 1,

Salt hole structure of the pre-mixed gas burner, characterized in that the hole is made of a circular or oval.
The method of claim 1,

Holes formed in each of the salt flat plate, the salt hole structure of the pre-mixed gas burner, characterized in that the hexagonal shape is surrounded by six holes around a hole formed in the center.
The method according to any one of claims 1 to 3,

The salt hole structure of the pre-mixed gas burner, characterized in that the plurality of salt plate is stacked so as to overlap at different angles.
The method according to any one of claims 1 to 3,

Salt structure of the pre-mixed gas burner, characterized in that when the plurality of salt plates are overlapped with each other, the salt holes of different sizes and shapes are formed in a predetermined pattern.
The method according to any one of claims 1 to 3,

The salt hole plate is salt structure of the pre-mix gas burner, characterized in that consisting of any one of a flat plate, curved plate, hemispherical plate, and a cylindrical plate.