KR19990000646A - Premixed Burner for Gas Boiler - Google Patents

Abstract

The present invention is an economical premix burner (Premix Burner) of the domestic gas boiler without space constraints, by optimizing the flow path to completely mix the gas and air in the pre-combustion mixing ratio and then supply it to the salt hole surface for complete combustion The present invention relates to a premixed burner capable of realizing complete combustion with a low air cost as well as a much higher combustion efficiency than a conventional semi-bunsen burner. The blower (1) and gas nozzle for supplying combustion air are provided. The burner 5, which is a premixed burner of (4), has an inclined assembly portion and has a compact space, and the burner 5 has air flow generated from the blower 1 and gas from the gas nozzle 4. The burner mixing pipe 8 which is completely mixed while hitting the wall surface and the gas mixed in the burner mixing pipe 8 are mixed again, and the flow of the mixed gas is equally divided in front of the burner 5. Premix burner for a gas boiler to the burner inclined surface (7) is installed, which as its features.

Description

Premixed Burner for Gas Boiler

The present invention relates to a premix burner of an economical domestic gas boiler without being constrained by space. More specifically, the gas and air are optimized by optimizing a flow path so that combustion air and gas are completely mixed at an optimal mixing ratio. Since it is completely mixed in the mixing ratio of the combustion optimum state in advance and then supplied to the flame process surface to completely burn it, the combustion efficiency is much higher than that of the conventional semi-bunsen burner and the combustion can be realized even with a small air cost. It relates to a mixing burner.

In a gas boiler, a gas fuel is combusted. The semi-bunsen burner mixes 30-40% of primary air in the venturi structure burner front, that is, in the venturi part 20, as shown in FIG. Combustion is carried out, and the insufficient combustion air is injected into the vicinity of the flame formed by the secondary air, so that a large amount of air ratio is required, combustion efficiency is low, and the structure is complicated.

Gas burners that burn gaseous fuel are classified into a method of supplying combustion air in primary, primary, or secondary mode according to a method of mixing gas fuel and combustion air, and in a manner of completely mixing with fuel in the first stage. In the latter burner, the pre-mixed burner may be burned by mixing the gas and air in the mixing ratio of the combustion optimum state in advance and then supplying it to the salt hole surface.

In the premixed gas burner for premixed combustion in a gas boiler, the premixed combustion is a gaseous fuel combustion method, which mixes gaseous fuel and primary air in advance and supplies the combustion to the burner to produce air and gas under optimum combustion conditions. Consider mixing methods. However, in domestic gas boilers, there are space limitations and technical difficulties, such as installing various structures therein for mixing in optimum conditions of combustion.

Under these circumstances, the conventional premixed burner has a complicated structure or a larger burner size, such as a vortex structure or a flow path inside the burner body in order to improve the mixing performance. It was supposed to be secured.

However, they have the disadvantage that the structure is complicated, not only the workability and manufacturability is low, but also the manufacturing cost is high.

Accordingly, the present invention is a compact and economical pre-mixing burner without space limitation, and has a perfect mixing performance to satisfy the combustion conditions, compact and in order to solve the drawbacks of the conventional pre-mixing burner as described above, air proportional Applicable to the control system, the flow path is optimized to be suitable not only for the conventional semi-bunsen boiler but also for the vertical down combustion method or the condensing boiler. The purpose of the present invention is to provide a premixed burner capable of realizing complete combustion even with a low air cost as well as a much higher combustion efficiency than the conventional semi-bunsen burner.

1 is a perspective view showing a pre-mixed burner for a gas boiler according to an embodiment of the present invention,

Figure 2 is an internal cross-sectional view showing a pre-mixed burner for a gas boiler of the present invention,

3 is a cross-sectional view showing in detail the portion of the burner and heat exchanger shown in FIG.

4 is a fluid flow diagram for explaining the gas mixture pre-burner of the present invention,

5 is a combustion cross-sectional view of the semi-bunsen burner.

Explanation of symbols on the main parts of the drawings

1: blower 4: gas nozzle

5: burner 6: heat exchanger

In order to achieve the above object, the premixed burner for the gas boiler of the present invention is a blower (1) for supplying combustion air and a burner (5), which is a premixed burner of the gas nozzle (4), whose assembly is inclined and spaced. This compact, the burner (5) has a burner mixing pipe (8) which allows the air volume generated by the blower (1) and the gas from the gas nozzle (4) to be completely mixed while hitting the wall surface, and the burner mixing pipe ( It is characterized in that the burner inclined surface 7 for mixing the gas mixed in 8) once again and equalizing the flow of the mixed gas to the burner 5 front.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a gas boiler premixed burner according to an embodiment of the present invention, wherein the blower 1 for supplying combustion air and the burner 5 which is the premixed burner of the present invention are inclined at an assembled position. The blower 1 is provided with a motor 2 and a blower wind pressure port 3, and the burner 5 is provided with a gas nozzle 4 for supplying gas.

Therefore, since the assembly part of the said burner 5 and blower 1 which are integrated is inclined, the space can be made compact.

The burner 5 is mixed with the burner mixing pipe 8 and the burner mixing pipe 8 to completely mix the air flow generated from the blower 1 and the gas from the gas nozzle 4 by hitting the wall surface. The burner inclined surface 7 which mixes gas once again and equalizes the flow of mixed gas on the burner 5 whole surface is provided.

The pre-mixed burner of the present invention is economical without being constrained by space, thereby optimizing the flow path to completely mix the gas and air at the mixing ratio of the combustion optimum state, and then supplying it to the salt hole to completely burn the conventional semi-bunsen type. Combustion efficiency is much higher than that of burners, and complete combustion can be realized with a low air cost.

FIG. 2 is an internal sectional view showing the pre-mixed burner for the gas boiler of the present invention, in which the blower 1 shown in FIG. 1 is removed from the burner 5 and the heat exchanger 6 of the internal combustion chamber is installed at the bottom. do.

An orifice 9 is installed at the assembly portion of the blower 1 to control the blowing amount of the blower 1 and generate a differential pressure at the front / rear end of the blower 1 to be applicable to an air proportional control system. Since the negative pressure is generated at the surface where the nozzle 4 is provided, gas and air are mixed using this negative pressure.

In addition, the burner 5 is provided with a burner mixing pipe 8 and a burner inclined surface 7 to maximize the mixing performance in the mixing chamber and to uniformly distribute the distribution of the mixed gas.

Distribution plate 10, primary and secondary rectifying plates 11 and 12, metal structure 13 having meshes and salt hole surface 14 sequentially under the mixing chamber in burner inclined surface 7 Will be placed.

The distribution plate 10 may uniformly distribute and distribute the mixed gas, and the first and second rectifying plates 11 and 12 may finally rectify the mixed gas and determine the capacity of the burner 5. The salt hole 14 may optionally be used as MFB (Metal Fiber Burner) salt holes, ceramic salt holes, stainless steel stacked salt holes, etc. to burn the finally reached mixed gas and prevent backfire.

Therefore, the burner 5 distributes the mixed gas in the inner distribution plate 10 and completely mixes and distributes uniformly in the first and second rectifying plates 11 and 12 thereunder, and burner capacity. MFB salt holes, ceramic salt holes, and stainless steel stacked salt holes in the salt hole surface 14 under the metal structure 13 having a mesh can be selectively determined without obstacles.

3 is a cross-sectional view showing in detail the portion of the burner and heat exchanger shown in FIG. 2, the salt hole surface 14 in the state in which the burner 5 and the heat exchanger 6 shown in FIG. The metal structure 13 having the mesh, the secondary rectifying plate 12 and the secondary rectifying plate 11 are stacked, and these are guided on both sides of the burner 5 using bolts 15 on both sides of the burner 5. The salt hole surface 14 has a salt hole supporting guide 16 placed on both sides of the salt hole surface 14, and a metal structure 13 having a mesh therebetween is joined to the salt hole surface 14, The secondary rectifying plate 12 and the primary rectifying plate 11 are fastened to the guide 16 through the overheating prevention packing 18.

That is, through the bolt 15 to the salt hole support guide 16 on the salt hole guide 17 for supporting the corresponding salt hole forming the salt hole surface 14 in the burner 5 and defining the combustion zone limit surface. By overheating the packing 18, the second rectifying plate 12 and the first rectifying plate 11 is fastened and integrated, the overheating packing 18 to block the heat transmitted by the combustion chamber burner ( 5) can prevent overheating and maintain airtightness against leakage.

Accordingly, an overheating prevention packing 18 is installed between the first and second rectifying plates 11 and 12 and the salt hole support guide 16 to block heat transfer to the burner 5 by the combustion chamber.

4 is a fluid flow diagram illustrating the gas boiler pre-mixing burner according to the present invention, wherein an orifice 9 is provided between the assembly of the blower 1 and the burner 5 shown in FIG. Gas nozzles 4 are provided on the surface orthogonal to each other, and the surface of the gas nozzle 4 orthogonal to the orifice 9 while the air volume generated in the blower 1 passes through the orifice 9 Since negative pressure is generated, the gas supplied through the gas nozzle 4 is primarily mixed with air.

The mixed gas primarily mixed in the burner 5 hits the wall surface of the burner mixing tube 8 to perform secondary mixing, and the secondary mixed gas flows through the wall surface of the burner mixing tube 8 and tertiary mixing. Done. This mixed gas reaches the burner inclined surface 7 through the mixing chamber and is completely mixed to form an even distribution of an even distribution.

Subsequently, the mixed gas is distributed evenly by the distribution plate 10, and is completely evenly distributed and rectified in the first and second rectifying plates 11 and 12, and the capacity of the burner 5 is determined. .

Therefore, the mixed gas passing through the second rectifying plate 12 is burned in the combustion chamber in the heat exchanger 6 by burning the flame hole 14 under the metal structure 13 having the mesh. In addition, since the capacity of the burner 5 is determined in the first and second rectifying plates 11 and 12, any type of MFB salt hole, ceramic salt hole, stainless steel laminated salt hole, etc. forming the salt hole surface 14 may be used. Optionally available.

On the other hand, as described above, the heat transmitted to the salt hole guide 17 and the salt hole support guide 16 of the burner 5 shown in FIG. In order to prevent the overheating packing 18 is installed between the first and second rectifying plates (11, 12) and the salt hole support guide (16), the assembly portion with the blower (1) as described above By tilting, the installation space of the blower 1 is maximized.

As described above, according to the present invention, it is an economical premixed burner that is compact and has a perfect mixing performance that satisfies an optimum combustion condition and is not restricted by space, and is applicable to an air proportional control system and is a conventional semi-bunsen boiler. In addition, since the flow path is optimized to be suitable for the vertical down combustion method or the condensing boiler, the gas and air are completely mixed with the mixing ratio of the combustion optimum state, and then the flame is supplied to the flame contact surface so that the combustion is completed. It is possible to provide a premixed burner that not only makes the efficiency much higher but also achieves complete combustion with a low air cost.

Claims (5)

The burner 5, which is a premixed burner of the blower 1 and the gas nozzle 4, which supplies combustion air, is inclined at an assembling part, thereby making the space compact. The burner (5) has a burner mixing tube (8) for mixing the air volume generated by the blower (1) and the gas from the gas nozzle (4) against the wall surface and completely mixed with the burner (8). A premixed burner for a gas boiler, characterized in that a burner inclined surface (7) for mixing the gas once again and equalizing the flow of the mixed gas on the front of the burner (5). The burner mixing pipe 8 is installed in the burner 5 of the premixed burner, and the burner inclined surface 7 is formed to maximize the mixing performance in the mixing chamber and to evenly distribute the distribution of the mixed gas. Distribution plate 10, primary and secondary rectifying plates 11 and 12, metal structure 13 having meshes and salt hole surface 14 sequentially under the mixing chamber in burner inclined surface 7 Premixed burners for gas boilers, characterized in that the laid. 3. The premix burner according to claim 2, wherein the first and second rectifying plates (11, 12) finally rectify the mixed gas and determine the capacity of the burner (5). 3. The premix burner for gas boilers according to claim 2, wherein the salt hole surface (14) is selectively used in MFB (Metal Fiber Burner) salt holes, ceramic salt holes, stainless steel stacked salt holes, and the like. The salt hole surface 14 is placed on both salt hole guides 17 on both sides of the burner 5 using bolts 15, and the salt hole support guides 16 are placed on both sides of the salt hole surface 14, respectively. A metal structure 13 having a mesh is coupled therebetween, and the second rectifying plate 12 and the first rectifying plate 11, etc., are mounted on the salt support guide 16 through an overheating prevention packing 18. Pre-mixed burner for gas boiler, characterized in that the fastening.