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Combustion method of the burner

一种燃烧方法、燃烧器的技术，应用在燃烧器的燃烧领域，能够解决未提供有有效合适的方法等问题，达到降低NOx的效果

Inactive Publication Date: 2015-10-21
NIPPON SANSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, the inventors of the present application carried out the results of additional tests on the reduction effect, and confirmed that although NO x The reduction effect, but the reduction effect with practical value has not been obtained, and further innovative technology development is required
[0023] Based on this background, it is expected that NO x reduce method, but the current situation is that there is no effective and suitable method

Method used

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no. 1 Embodiment approach

[0054] Hereinafter, the combustion method using the burner according to the first embodiment of the present invention will be described in detail using the drawings. In the drawings used in the following description, in order to facilitate the understanding of features, the characteristic parts may be shown enlarged for convenience, and the dimensional ratio of each component is not necessarily the same as the actual one.

[0055] Such as figure 1 and figure 2As shown, the burner 1 used in this embodiment is roughly composed of a fuel nozzle 2 that injects a fuel flow (fuel fluid), a primary oxidant nozzle 3 that injects a primary oxidant flow (primary oxidant fluid), and a secondary oxidant flow that injects (secondary oxidant fluid) of a plurality of secondary oxidant nozzles 4 constitute.

[0056] Such as figure 1 As shown, the fuel nozzle 2, the primary oxidant nozzle 3, and the secondary oxidizer nozzle 4 are all formed in a cylindrical shape, and their longitudinal d...

no. 2 Embodiment approach

[0113] Next, a combustion method using the burner according to the second embodiment of the present invention will be described.

[0114] This embodiment is a modified example of the first embodiment, and description of the same parts will be omitted.

[0115] The present embodiment is different from the first embodiment in that the flow rate of the fuel flow is controlled to be changed periodically, and other burner structures are the same.

[0116] In the present embodiment, the flow rate of the fuel flow changes periodically, and the periodic change in the flow rate of the fuel flow and the periodic change in the oxygen ratio are controlled to have the same frequency.

[0117] In addition, the phase difference between the flow rate of the fuel flow and the periodic change of the oxygen ratio is controlled to be above π / 2 and below 3π / 2 (that is, the absolute value of the phase difference between the flow rate of the fuel flow and the periodic change of the oxygen ratio is π...

Embodiment 1

[0131] In embodiment 1, use burner 1 to carry out experiment, described burner 1 is in the side of the test furnace of cuboid, as figure 1 and figure 2 As shown, the primary oxidant nozzle 3 is arranged to surround the outer periphery of the fuel nozzle 2, and the two secondary oxidant nozzles 4 are arranged on the same plane at positions symmetrical to each other with the fuel nozzle 2 as the axis center. The distance l between the two secondary oxidant nozzles 4 was set to 50 cm, and the flow velocity of the secondary oxidant flow ejected from the secondary oxidant nozzles 4 was set to 100 m / s. At the bottom of the test furnace, a plurality of water-cooled tubes are arranged in a direction perpendicular to the ejection direction of the nozzle, and temperature-measuring resistance elements are inserted into the inlet and outlet of each water-cooled tube.

[0132] LNG is used as the fuel, the flow rate of the fuel flow is set constant, the time-averaged oxygen ratio is set t...

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Abstract

The present invention provides a combustion method of a burner, which is a combustion method of a burner that supplies an oxidant flow and a fuel flow for combustion, and the oxidant flow is injected from the surroundings of the combustion flow or the vicinity of the fuel flow. The primary oxidant flow, and a plurality of secondary oxidant flows, while at least one of the flow rates of the primary oxidant flow and the plurality of secondary oxidant flows is periodically changed, the oxygen in the oxidant flow Giving a periodic change in the concentration, giving a periodic change to the oxygen ratio of dividing the oxygen supply amount supplied by the oxidant flow by the theoretical oxygen demand, by setting a difference between the periodic change of the oxygen concentration and the oxygen ratio, combustion state becomes a periodic oscillatory state.

Description

technical field [0001] The invention relates to a combustion method of a burner. [0002] this application claims priority based on Japanese Patent Application No. 2011-014080 for which it applied to Japan on January 26, 2011, and uses the content here. Background technique [0003] In recent years, global environmental issues have attracted attention, among which nitrogen oxides (NO x ) reduction is one of the important issues and is an urgent problem to be solved. as the NO x As for reduction methods, techniques related to suppression of production are important, and exhaust gas recirculation, lean combustion, rich-lean combustion, multi-stage combustion, etc. are known, and are widely used from industrial use to civilian use. By applying these technologies the low NO x Combustion devices, to some extent NO x Countermeasures have progressed, but more effective NO x lowering method. [0004] As a method to solve these problems, as NO x As one of the reduction method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C99/00F23C6/04F23C15/00F23L7/00
CPCF23C6/045F23C7/02F23C99/00F23C2205/10F23C2205/20F23D14/22F23D14/32F23L9/00F23N1/02F23N3/002F23N2237/26F23C6/04F23C15/00F23L7/00Y02E20/34
Inventor 羽路智之饭野公夫山本康之萩原义之
Owner NIPPON SANSO CORP
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