KR200200487Y1 - Structure of burner in a boiler - Google Patents

Abstract

The burner structure of the boiler according to the present invention is provided with a combustion chamber at one side, and a burner body installed at the boiler body having a blowing means for blowing air to the combustion chamber at the other side; A swirler installed at a central portion of the nozzle mounting portion through which the fuel injection nozzle is inserted and installed, and a plurality of air passage holes through which air passes through the nozzle mounting portion are installed on the inner wall of the combustion chamber; It characterized in that it comprises a fuel injection nozzle which is installed on the nozzle installation portion of the swirler to mix the fuel and air after passing through the swirler,

According to the configuration as described above, by configuring the fuel to be mixed with the air rotated through the swirler in the state in which the fuel is injected without passing through the swirler, to induce complete combustion of the mixed gas fuel and air mixed to reduce fuel consumption and There is an effect that can reduce the emission of soot gas.

Description

Burner Structure of Boiler {STRUCTURE OF BURNER IN A BOILER}

The present invention relates to a burner structure of a boiler, and more particularly, by mixing the fuel and air mixed with the air rotated through the swirler in a state in which the fuel is injected without passing through the swirler, the mixture of the fuel and air mixed gas It relates to a burner structure of a boiler to induce combustion to reduce fuel consumption and to reduce emission of soot gas.

1 is a view showing the structure of a typical furnace associated boiler.

As shown, in the furnace associated boiler, a plurality of plumbing 3 and a plurality of flues 4,5 arranged side by side with the corrugated barrel 2 are arranged inside the boiler body 1, and the boiler The front of the body 1 has a structure in which the burner 6 is provided.

Reference numerals 7,8, and 9 are safety valves, steam valves, and water supply valves respectively installed on the upper portion of the boiler body 1.

Referring to the operation of the conventional furnace-associated boiler configured as described above are as follows.

First, in the combustion chamber (not shown) of the burner 6, a mixture gas of air and fuel ignited by an igniter (not shown) is ignited to become a flame, and the flame is a corrugated furnace 2 with its own radiant heat. Let this be high temperature.

As the corrugated furnace 2 becomes hot, the water filled in the boiler body 1 gradually becomes hot.

Thereafter, the combustion gas formed by the flame combusted in the combustion chamber passes heat through the corrugated furnace 2 and passes through the pipe 3 so that the temperature of the water filled in the boiler body 1 increases so that a plurality of flues 4 After passing through the plumbing arranged vertically through 5), it is discharged to the chimney along the direction of the arrow P.

On the other hand, in the conventional furnace-linked boiler having the above functions and configurations, a burner 6 is used to generate a flame by igniting a mixed gas of air and fuel as a means of warming the water contained in the boiler body 1 to a high temperature. The burner 6 minimizes the generation of smoke generated by the combustion of the mixed gas of air and fuel, and reduces the fuel consumption. As a result, burners are being developed steadily to induce complete combustion.

2 and 3 illustrate a burner according to the prior art developed according to the above trend.

As shown, the burner according to the prior art is provided with a combustion chamber (11) on one side and a blowing means (not shown) for blowing air to the combustion chamber (11) on the other side is installed in the boiler body (not shown) A burner body 10, an air injection nozzle 12 installed in the combustion chamber 11 to inject air, and fixed to an inner wall of the combustion chamber 11 so as to be spaced apart from an end of the air injection nozzle 12 by a predetermined interval; It consists of a swirler 13.

The swirler 13 is formed with a through hole 13a having a predetermined diameter in the center portion, and a plurality of vanes 13b are formed radially around the through hole 13a.

Reference numeral 14 is an igniter.

Referring to the conventional operation configured as described above are as follows.

First, the blowing means is driven to supply air to the combustion chamber 11 through the burner body 10 and fuel is injected from the fuel injection nozzle 14.

The fuel injected as described above and the air supplied are mixed in the space between the fuel injection nozzle 12 and the swirler 13, and the mixed gas is finally filled with the through hole 13a formed in the swirler 13. It moves through the vane 13b.

Here, the mixed gas is ignited by the flame generated from the igniter 14 at the time when the fuel is injected from the fuel injection nozzle 12, and then the flame propagates in the combustion chamber 11 do.

However, according to the prior art as described above, fuel and air injected from the fuel injection nozzle 12 are mixed between the fuel injection nozzle 12 and the swirler 13 and ignited, and the injected fuel is the swirler 13 It is resisted by), and because air is mixed with the fuel in the absence of rotation at all, causing incomplete combustion to increase fuel economy and increase the emission of soot gas.

The present invention is devised to solve the above problems, and is configured to be mixed with the air rotated through the swirler in the state in which the fuel is injected without passing through the swirler, the fuel and air mixed gas mixture completely It is an object of the present invention to provide a burner structure of a boiler which can induce combustion to reduce fuel consumption and reduce emission of soot gas.

1 is a cross-sectional view showing the configuration of a typical furnace-associated boiler.

2 is a cross-sectional view showing a burner structure of a boiler according to the prior art.

Figure 3 is an external perspective view of the swirler shown in FIG.

Figure 4 is a perspective view showing the appearance of the burner of the boiler applied to the present invention.

5 is a cross-sectional view showing a burner structure according to the present invention.

Figure 6 is a plan view according to one embodiment of a swirler applied to the burner of Figure 5;

7 is a plan view of the outer body according to another embodiment of the swirler according to the present invention.

8 is a side view of FIG. 7;

9 is a plan view of the inner body according to another embodiment of the swirler according to the present invention.

10 is a side view of FIG. 9;

FIG. 11 is a plan view of the swirler in which the outer body and the inner body shown in FIGS. 7 and 9 are combined;

12 is a plan view of a swirler according to another embodiment of the present invention.

13 is a view showing a comparison of the conventional and the present invention the U-vector velocity distribution in the cross section from 5mm to 15mm in the fuel injection nozzle.

14 is a cross section from 5 mm to 15 mm in the fuel injection nozzle; Figure showing the mean diameter distribution (SMD) and the U-vector velocity distribution comparing the conventional and the present invention.

FIG. 15 is a diagram illustrating a U-vector velocity distribution and a velocity vector distribution in the V and W directions in a cross section of a flow field 5 mm away from a fuel injection nozzle in comparison with the present invention. FIG.

<Explanation of symbols for main parts of the drawings>

20: burner body

21: combustion chamber

22: fuel injection nozzle

30,70: Swallower

31,41: nozzle installation

32a, 32b, 32c, ..., 42,52: Air through hole

The burner structure of the boiler according to the present invention for achieving the above object is provided with a combustion chamber on one side, the burner body is provided on the boiler body having a blowing means for blowing air to the combustion chamber on the other side; A swirler installed at a central portion of the nozzle mounting portion through which the fuel injection nozzle is inserted and installed, and a plurality of air passage holes through which air passes through the nozzle mounting portion are installed on the inner wall of the combustion chamber; After passing through the swirler is characterized in that it comprises a fuel injection nozzle which is installed on the nozzle installation portion of the swirler so that fuel and air are mixed.

Hereinafter, a preferred embodiment of the burner structure of the boiler according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view showing the appearance of the burner of the boiler applied to the present invention, Figure 5 is a cross-sectional view showing the burner structure according to the present invention, Figure 6 is an embodiment of a swirler applied to the burner of Figure 5 7 is a plan view of the outer body according to another embodiment of the swirler according to the present invention, Figure 8 is a side view of Figure 7, Figure 9 according to another embodiment of the swirler according to the present invention Figure 10 is a plan view of the inner body, Figure 10 is a side view of Figure 9, Figure 11 is a plan view of a swirler showing a combination of the outer body and the inner body shown in Figures 7 and 9, Figure 12 is another aspect of the present invention A top view of a swirler according to another embodiment.

As shown, the burner body 20 is provided on the boiler body (not shown) provided with a combustion chamber () on one side and a blowing means (not shown) for blowing air to the combustion chamber 21 on the other side, and the central portion The nozzle mounting portion 31 is formed to be penetrated in the air, and a plurality of air passage holes 32 through which air passes around the nozzle mounting portion 31 are formed on the inner wall of the combustion chamber 20. And a fuel injection nozzle 22 installed on the nozzle mounting portion 31 of the swirler 30 so that fuel and air are mixed after passing through the swirler 30.

The burner body 20 is formed in a cylindrical shape with an empty inside, as shown in FIGS. 4 and 5.

The swirler 30 has the single air, as shown in FIG. An air through hole arrangement group 32 in which through holes 32a, 32b, 32c, ... are radially arranged around the nozzle mounting portion 31 is formed, and the air through hole arrangement group 32 is formed. A plurality of these are formed around the nozzle mounting portion 31.

Reference numeral 23 is an igniter.

Referring to the operation of the present invention configured as described above are as follows.

First, the blowing means is driven to supply air to the combustion chamber 21 through the burner body 20 and fuel is injected from the fuel injection nozzle 22.

As described above, the air moved into the combustion chamber 21 passes through the swirler 30 through the air passing holes 32a, 32b, 32c, ... formed in the swirler 30.

More specifically, it is rotated after passing through the swirler 30 by the formation structure of the air passage holes 32a, 32b, 32c, ....

On the other hand, since the fuel injection nozzle 33 is inserted into the nozzle mounting portion 31 of the swirler 30, the fuel starts to be injected from the portion outside the swirler 30.

As described above, the fuel is mixed with the air being rotated because it is injected in the region outside the swirler 30, and the mixed gas in which the fuel and air are mixed is ignited by a flame generated from the igniter 23, Thereafter, the flame is broken into the combustion chamber 21.

Here, the flame generated in the combustion chamber 21 is completely burned by the mixed gas formed by mixing the air rotated while passing through the swirler 30 and the fuel injected without the resistance of the swirler 30. As a result, it is possible to obtain fuel economy reduction and emission of soot gas.

The description so far describes the operation of the burner to which the swirler formed integrally is applied.

However, as shown in FIGS. 7 to 11, the swirler 70 may be formed as a separate type.

The structure has a nozzle mounting portion 41 in which the fuel injection nozzle 22 is inserted through and installed in the center thereof, and the air passage hole 42 through which air passes around the nozzle mounting portion 41. The inner body 40 is formed, and the coupling hole 51 and the air passage hole 52 through which air passes around the coupling hole 51 at the center thereof are formed on the inner wall of the combustion chamber 21. It is composed of a fixed outer body (50).

8 and 10, the air passage holes 42 and 52 formed in the inner body 40 and the outer body 50, respectively, are formed to be inclined at a predetermined angle. The reason is that the air passing through becomes a vortex.

On the other hand, as shown in Figure 12 is interposed between the outer surface of the inner body 40 and the coupling hole 51 of the outer body 50, a plurality of intermediate body formed with an air passing hole 61 through which air passes It consists of 60.

Here, the air passage holes 42, 52, 61 formed in the inner body 40, the outer body 50 and the intermediate body 60 are formed in a radial arrangement around the nozzle installation portion 41 do.

FIG. 13 is a view showing the distribution of U-vector velocity in the cross section of 5mm to 15mm in the fuel injection nozzle in comparison with the conventional invention. FIG. As it is not mounted, the speed is fast while it is not concentrated in the center, and the hollow part is widely distributed inside.

On the other hand, the figure on the right is smaller than the figure on the left, and the hollow part becomes smaller and the flow chart becomes circular.

This shows that the flow of the flow in the burner is constant and gathers to the center, resulting in complete and uniform combustion during combustion.

FIG. 14 is a view showing the mean diameter distribution (SMD) and the U-vector velocity distribution in a cross section of 5 mm to 15 mm in the fuel injection nozzles compared with the conventional and the present invention. The left figure is a conventional technique, which shows that the average diameter distribution is larger than the right figure with swirl, and the flow distribution is out of the center and the flame is uniform during combustion due to the effect that the right side with swirl is centered. Distributed.

In other words, when the average diameter distribution decreases, the evidence of good atomization indicates that the combustion is complete.

In addition, the arrow means speed, and the hollow part in the center is smaller in the right picture than the left picture.

This indicates that similar droplets are evenly distributed.

FIG. 15 is a diagram illustrating a comparison of the U-vector velocity distribution and the velocity vector distribution in the V and W directions in the cross section of a flow field 5 mm away from the fuel injection nozzle in comparison with the prior art. Velocity distribution is uniform in I can know others.

As described above, according to the present invention, according to the above configuration, by mixing the fuel and air mixed with the air rotated through the swirler in the state in which the fuel is injected without passing through the swirler, the mixed gas and fuel By inducing the complete combustion of the fuel economy has the effect of reducing emissions and emissions of soot gas.

Claims (4)

A burner body 20 provided at one side of the combustion chamber 21 and having a blowing means for blowing air to the combustion chamber 21 at the other side; Nozzle mounting portions (31, 41) are formed through the central portion, and the air passage holes (32a, 32b, 32c, ..) through which the air passes around the nozzle mounting portions (31, 41). A swirler (30, 70) formed on the inner wall of the combustion chamber (21) with a plurality of .42, 52; And a fuel injection nozzle 22 installed on the nozzle installation parts 31 and 41 of the swirler 30 and 70 after passing through the swirler 30 and 70 to mix fuel and air. Burner structure of boiler. The method of claim 1, The swirler 30 is formed with an air passing hole array group 32 in which the single air passing holes 32a, 32b, 32c, ... are arranged radially around the nozzle mounting portion 31. The burner structure of the boiler, characterized in that the plurality of air passage hole array group 32 is formed around the nozzle installation portion (31). The method of claim 1, The swirler 70 is inserted through the fuel injection nozzle 22 in the center portion An inner body 40 having a nozzle mounting portion 41 formed therein and having an air passage hole 42 through which air passes around the nozzle mounting portion 41; A coupling hole 51 and an air passage hole 52 through which air passes around the coupling hole 51 are formed at a central portion thereof, and the outer body 50 is fixed to the inner wall of the combustion chamber 21. Wow; Is interposed between the outer surface of the inner body 40 and the coupling hole 51 of the outer body 50, consisting of a plurality of intermediate body 60 is formed with an air passage hole 61 through which air passes Burner structure of the boiler characterized by the above-mentioned. The method of claim 3, wherein Burner structure of the boiler, characterized in that the air passage hole (42, 52) (61) is arranged radially around the nozzle installation portion (41).