KR0129732Y1 - Gas burner having coaxial two swirler - Google Patents

Abstract

The present invention relates to a high load submerged gas burner used in a submerged combustion apparatus, which provides a rapid and uniform mixing of gas and air at the tip of a burner nozzle and a wide range of recirculation zones at the center of the combustion chamber for high load combustion of single salt required for submerged combustion apparatus. Since the formation is essential, the gas supply pipe (1) and the spark plug (4) are installed in the direction of the burner nozzle in the upper burner head by using the swing characteristic of air and gas. Install the gas nozzle 2 within 30 ° to 60 ° and install the air swirler 3 outside the gas nozzle 2 so that the turning direction of the air is the same as the gas turn within the turning angle β of 60 ° to 75 °. In the middle of the middle wall of the combustion chamber (7), an air inlet space is provided to prevent overheating of the combustion chamber, and the inclination angle (γ) is set to 30 ° to 45 ° to accelerate the gas / air mixing and stabilize the flame. Coaxial double turning characterized in that the combustion chamber inner wall (6) is provided to reduce and expand the area, and a plurality of air holes are installed in the combustion chamber inner wall (6) in the circumferential direction so that air is injected into the center of the combustion chamber having a high fuel concentration ratio. Heavy-duty submerged gas burners.

Description

Coaxial Dual Slewing High Load Submerged Gas Burners

1 is a schematic view of the overall structure of the burner of the present invention.

2 is an enlarged cross-sectional view of the gas nozzle in FIG.

3 is an enlarged cross-sectional view of the air swirler in FIG.

(b) is sectional drawing of the 3a part in (a) figure.

(c) is sectional drawing of the 3b part in (a) figure.

(d) is also an illustration of an air swirler according to the present invention.

4 (a) is an enlarged cross-sectional view of the inner wall of the combustion chamber in FIG.

(b) is an enlarged sectional view of the combustion chamber middle wall in FIG.

(c) is an enlarged cross-sectional view of the outer wall of the combustion chamber in FIG.

* Explanation of symbols for main parts of the drawings

1: gas supply pipe 2: gas nozzle

3: air turner 4: spark plug

5: air supply pipe 6: combustion chamber inner wall

7 combustion chamber middle wall 8 combustion chamber outer wall

9: flame sight 10: flame detector

11 combustion chamber 61 secondary air injection hole

71: air inlet space

The present invention relates to a coaxial double swing high load liquid gas burner, which uses air and gas swing characteristics at the tip of the burner nozzle to quickly and uniformly mix air and gas, and forms a wide recirculation zone at the center of the combustion chamber to increase the flame length. It relates to a coaxial double turning high load submerged gas burner capable of performing combustion at short and high loads.

In general, the burner used in the submerged combustion apparatus is located in the liquid, so that incomplete combustion and flame instability due to the liquid surface flow and the contact between the flame and the liquid are likely to occur. In order to minimize this, the burner should be designed and manufactured with a structure of short flame length and high combustion load.

In order to carry out the high load combustion of the single salt, gas and air should be mixed quickly and uniformly at the burner nozzle tip, and an extensive recirculation zone should be formed at the center of the combustion chamber.

The present invention is configured to satisfy the above conditions by using the swing characteristics of air and gas, and will be described in detail with reference to FIGS. 1 to 4 of the accompanying drawings.

1 is a schematic view showing the overall structure of the burner of the present invention, and the present invention includes a gas burner combustion chamber 11 including an outer wall, an intermediate wall, and an inner wall, and an air turner 3 installed on one side of the inner wall 6 of the combustion chamber. And a gas supply pipe (1), a spark plug (4), a flame seeker (9), and a flame detector (10) connected to and installed in the air turner (3), and having the same center line as the gas supply pipe. It consists of the gas nozzle 2 provided in the lower part of the turning machine 3.

The combustion chamber 11 is a place where the gas mixed with air is combusted, as shown in FIG. 4, an outer wall 8 having an air supply pipe 5 for supplying primary combustion air into the combustion chamber at one side thereof; In order to accelerate the mixing of gas and air and stabilize the flame, the inner wall 6 having a reduced and expanded cross-sectional area at an inclination angle γ of 30 ° to 45 °, and between the combustion chamber outer wall 8 and the inner wall 6 The intermediate wall 7 is provided. One side portion of the inner wall 6 is provided with a plurality of secondary air injection holes 61 in the circumferential direction so that air is injected into the center of the combustion chamber having a high fuel concentration ratio, and the inner wall of the combustion chamber ( An air inflow space 71 is formed therein to prevent the overheating of 6).

The air turner 3 is installed at one side of the combustion chamber inner wall 6 in the shape of a helical gear as shown in FIG. 3, and is introduced by the air supply pipe 5 to pass air through the air inlet space 71. Feed into the combustion chamber. In this case, since the air swirler 3 has a helical gear shape having a twist angle formed therein (hereinafter referred to as an air swing angle β) of 60 ° to 75 °, it is introduced into the combustion chamber inner wall 6. The air to be turned turns at an angle of 60 ° to 75 ° by the air swing angle β of the air turner 3 and flows therein.

One side of the gas supply pipe 1 is inserted into and installed in a hole formed in the center portion of the air turner 3 to supply combustion gas into the gas burner combustion chamber.

The spark plug explodes the gas introduced into the combustion chamber 11 by the gas supply pipe 1 by inserting and installing one side into another hole formed in the air swirler 3.

The flame seeker 9 and the flame detector 10 are installed to observe or detect the flame in the combustion chamber 11 from the outside, and one side is inserted and installed into another hole formed in the air turner 3. And the other side is connected to the combustion chamber outer wall 8.

As shown in FIG. 2, the gas nozzle 2 has a helical gear shape having a tooth twisted around the same, and has the same center line as the gas supply pipe 1 below the air turner 3 in which the gas supply pipe 1 is installed. It is provided with a, and supplies the gas introduced by the gas supply pipe (1) into the combustion chamber. At this time, since the gas nozzle 2 has a helical gear shape having an angle of twisting teeth (hereinafter referred to as gas swing angle α) formed around the air swirler 3, the angle is 30 ° to 60 °. The gas flowing into the combustion chamber inner wall 6 through the gas nozzle 2 is rotated at an angle of 30 ° to 60 ° by the gas swing angle α and flows in.

That is, according to the present invention, the gas supply pipe 1 and the spark plug 4 are installed in the burner head upper nozzle direction, and the helical gear-shaped gas nozzle having a gas turning angle α of 30 ° to 60 ° is turned into an air turning angle ( It is inserted and installed in the center of the air swirler 3 whose (beta) is 60 degrees-75 degrees. At this time, the gas turning direction of the helical gear-shaped gas nozzle 2 and the air turning direction of the air swirler 3 are installed in the same direction.

The reason why the gas and air are turned in the same direction is to increase the recirculation area in the center of the combustion chamber in the same direction, and in the opposite direction, the recirculation area in the center is destroyed, which leads to unburnt and flame instability. This is because the geometry in the combustion chamber suitable for high load combustion is suitable in the same direction in terms of the expansion of the internal recirculation zone formed in the combustion chamber center and the flame stabilization.

In order to accelerate gas and air mixing and stabilize the flame, the inclined angle γ was reduced and expanded in the combustion chamber inner wall 6 to 30 ° to 45 °, and air was injected to the center of the combustion chamber with a high fuel concentration ratio. At the position, a plurality of secondary air injection holes 61 were provided in the circumferential direction. In addition, an air inflow space 71 is provided at an intermediate position of the intermediate wall 7 to prevent overheating of the combustion chamber inner wall 6, and the combustion chamber outer wall 8 is disposed between the combustion chamber intermediate wall 7 and the combustion chamber outer wall 8. An air supply line is installed so that the secondary combustion air can be supplied radially.

Compared to the conventional submerged combustion gas burner system, the present invention configured as described above uses a method of injecting gas in the burner nozzle direction or the orthogonal direction, whereas the present invention has a proper turning angle in the same direction as the air turn. By spraying, it is possible to mix the gas and air quickly and uniformly to enable a single salt high load combustion.

In addition, the secondary air injection hole is installed at an appropriate position of the combustion chamber inner wall to directly inject air into the recirculation zone having a high fuel concentration ratio in the center of the combustion chamber to accelerate the combustion speed, and to install an intermediate wall between the inner wall and the outer wall, The outer wall was protected while maintaining the combustion atmosphere temperature.

The present invention as described above greatly improves the performance of the existing submerged combustion burner, it is not only possible to replace the submerged combustion burner that is currently using all imported products, but also widely used as a burner for miniaturizing and reducing the boiler in various industrial fields. It is a very practical design that can be supplied.

Claims (1)

In submerged combustion burners; The submerged combustion burner is provided with an outer wall (8) provided at one side with an air supply pipe (5) for supplying primary combustion air into the combustion chamber, and a plurality of secondary air injection holes (61) in the circumferential direction. In order to accelerate the mixing and stabilize the flame, an inner wall 6 having a reduced and expanded cross section at an inclination angle γ of 30 ° to 45 ° is provided between the combustion chamber outer wall 8 and the inner wall 6, A gas burner combustion chamber 11 including an intermediate wall 7 having an air inflow space 71 formed at an intermediate position thereof; It is installed on one side of the combustion chamber inner wall (6), the gas supply pipe (1), spark plug (4), flame sight hole (9) and flame detector (10) is connected and installed, the air into the combustion chamber 60 ° ~ 75 A helical gear-shaped air swirler (3) having an air swing angle (beta) of 60 ° to 75 ° so as to be pivoted therein; A gas turning angle α of 30 ° to 60 ° is provided so that the gas flowing into the combustion chamber through the gas supply pipe 1 is turned into 30 ° to 60 °, and the air turning of the air swing 3 is performed. Helical gear-shaped gas inserted and installed with the same center line as the gas supply pipe 1 below the air swirler 3 so that the air turning direction by the angle β and the turning direction by the gas turning angle α are the same. A coaxial double turning high load submerged gas burner, comprising a nozzle (2), to perform single salt high load combustion.