Tubular flame burner

A flame burning, tubular technology, applied in the direction of burners, gas fuel burners, combustion chambers, etc., can solve problems such as flameout

Active Publication Date: 2014-06-11
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, as will be described in detail in the section of [Detailed Embodiment] described later, in the technology described in Patent Document 2, flameout (combustion stop) may sometimes occur.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0062] image 3 shows the tubular flame burner 10B according to Embodiment 1 of the present invention, Figure 4 It is a transverse cross-sectional view showing the installation state of the temperature adjustment gas injection nozzle 16 of the tubular flame burner 10B.

[0063] In the tubular flame burner 10B of this Embodiment 1, preventing such as figure 2 As shown, a part 18 of the temperature adjustment gas 17 flows back to the upstream side.

[0064] That is, if image 3 As shown, the temperature adjustment gas injection nozzle 16 is installed at an angle θ so that the temperature adjustment gas 17 is blown in a direction inclined at a predetermined angle θ toward the downstream side from a direction perpendicular to the tube axis of the tubular combustion chamber 11 . Specifically, the angle θ is set to 10° to 60° (10°≦θ≦60°). The angle θ is preferably 25° to 60°.

[0065] In addition, it was confirmed by numerical simulation that when the angle θ is 10° or more, ...

Embodiment approach 2

[0075] Figure 11 , Figure 12 , Figure 13 The tubular flame burners 10C, 10D, and 10E according to Embodiment 2 of the present invention are shown, respectively.

[0076] In the tubular flame burners 10C, 10D, and 10E of Embodiment 2, the position where the combustion of the tubular flame 14 is actively accelerated to complete the combustion is moved upstream from the position where the combustion is naturally completed, and is provided on the downstream side. Gas for temperature adjustment is blown into the nozzle 16 .

[0077] That is, a turbulent flow generating mechanism 20 is provided on the downstream side of the tubular flame 14 and upstream of the temperature-adjusting gas injection nozzle 16, so that the temperature of the tubular flame 14 will not decrease due to the backflow of the temperature-adjusting gas 17, and accelerate to a high temperature. The oxygen and fuel gas are mixed and burned, so that the combustion is forcibly completed.

[0078] Specifically...

Embodiment 1

[0092] As Example 1 of the present invention, using Figure 17 The shown combustion test apparatus 30 is for confirming the performance of the tubular flame burner 10B according to Embodiment 1 of the present invention described above.

[0093] At this time, as the fuel gas of the tubular flame burner 10 installed in the furnace body 31, dilute LPG (diluted propane gas, calorific value of 2400 kcal / Nm) obtained by diluting LPG (propane gas) to 10 times with nitrogen was used 3 ), air was used as the oxygen-containing gas. The sizes of the fuel gas injection nozzle 12 and the oxygen-containing gas injection nozzle 13 are respectively adjusted so that the velocity of the fuel gas injected toward the tangential direction of the inner wall surface of the combustion chamber 11 and the velocity of the air become within the combustion chamber 11. Approximately 9 times the gas velocity after mixing.

[0094] In addition, as the gas 17 for temperature adjustment, three kinds of dilut...

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Abstract

This tubular flame burner has a tubular combustion chamber having one open end, and is provided at the closed end side of the combustion chamber with a nozzle that blows in a fuel gas and a nozzle that blows in an oxygen-containing gas facing in the direction of the tangent line of the inner wall surface thereof. The open end side of the combustion chamber is provided with a nozzle that blows in a gas for adjusting the temperature of the combustion exhaust gas, and is provided with a backflow prevention means for preventing the gas for adjusting temperature blown in from the nozzle for blowing in the gas for adjusting temperature from backflowing towards the nozzle for blowing in the fuel gas.

Description

technical field [0001] The invention relates to a tubular flame burner. Background technique [0002] Such as figure 1 As shown, the tubular flame burner 10 has a tubular combustion chamber 11 with an open end. On the closed end side of the combustion chamber 11, a nozzle 12 for blowing fuel gas and a nozzle 12 for blowing oxygen-containing gas are provided towards the tangential direction of its inner wall surface. nozzle 13, thereby forming a tubular flame 14 in the combustion chamber 11, and the tubular flame burner 10 is able to realize the miniaturization of combustion equipment and reduce the increase of NO due to combustion conditions x It is an epoch-making burner for harmful substances such as hydrocarbons, unburned components such as hydrocarbons, and environmental pollution sources such as soot (for example, refer to Patent Documents 1 and 2). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: (Japanese) Unexamined Patent Publi...

Claims

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Application Information

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IPC IPC(8): F23C3/00F23D14/24
CPCF23D14/82F23C3/002F23D14/24F23C3/006F23C2900/03004F23D1/02F23L9/04
Inventor 野内泰平石井纯浅沼稔冈田邦明
Owner JFE STEEL CORP
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