KR20000024473A - Combustion Method Using Flow-Dispersion Multi Swirler and Combustor Using The Same - Google Patents

Abstract

PURPOSE: A combustion method and a device are provided to burn without pollution and to improve the efficiency of combustion. CONSTITUTION: A fuel supplied from a fuel supply device(2) and the air supplied from an air supply part(3) and passing through a lower swirler(4) are mixed together and ignited by an ignition device(6), then flames are formed and kept. The flames are not concentrated by passing through upper swirlers(5) according to the procedure of combustion. The upper swirlers are heated and kept in high temperature state. Herein, the incompletely burned elements are burned while colliding to the lower and upper swirlers. Therefore, the amount of smoke and carbon monoxide is reduced.

Description

Combustion Method Using Flow-Dispersion Multi Swirler and Combustor Using The Same}

The present invention provides a combustion flow by applying a plurality of swirlers to reduce pollution emissions such as carbon monoxide, nitrogen oxides and soot generated during combustion in gas and oil combustors, to improve combustion efficiency, and to easily maintain and convert flame forms. It relates to a method of operating a combustor by dispersing and a combustor using the method.

In the combustion apparatus using gas or oil as fuel, a smooth mixing of fuel components and air as an oxidant is required for stable combustion, and the flame needs to be combusted while being kept at a stable position. In the existing combustion equipment, a swirler is installed to rotate the air before fuel and air are mixed to form a flame.

The purpose of the swirler is to firstly provide a rotational component to the air flow supplied to the combustor so that the air flow rotates. This may promote the mixing of air and fuel components. Second, the shape of the air flow varies according to the shape of the swirler, and thus the shape of the flame may also be changed. If long flames are required, use of a swirler that is weak in rotational flow components and can produce a large amount of straight direction components is required. Apply Waller. The problems of swirler used so far are as follows.

First, in case of using a single swirler, there is no problem in playing the role of the swirler described above, but since the flame is concentrated at the point where combustion is actively progressed, there is a high possibility of nitrogen oxide emission that is likely to occur at high temperatures . Also, in areas where combustion is concentrated, due to the volume expansion caused by high temperature, the air supplied from the surrounding area does not reach the center of the flame, and the central portion of the flame is burned with excess fuel, and the combustion is caused with excessive air around the flame. Proceed. This increases the possibility of generating pollutants such as carbon monoxide, soot and nitrogen oxides.

Second, when a single swirler is used in the combustion apparatus, since it is impossible to actively change the fuel and air amount, combustion may proceed undesirably when the supply air amount or the fuel amount is changed. When the fuel supply amount is reduced or the supply air amount is large, the flame is extinguished as the flame is blown. When the fuel supply amount is high or the air amount is low, the flame size is reduced or the smoke is more severe.

The present invention has been made to solve the above problems, and an object of the present invention is to reduce pollution emissions such as carbon monoxide, nitrogen oxides and soot generated during combustion in gas and oil combustor, to improve combustion efficiency and to maintain flame form and In order to facilitate the conversion, a method of operating a combustor by dispersing combustion flow by applying a plurality of swirlers and providing a combustion apparatus using the method.

Another object of the present invention is to provide a clean low-polluting combustion as compared to the existing combustion equipment, and furthermore, to provide a method of improving combustion efficiency and a combustion apparatus using the method.

1 is a cross-sectional view schematically showing a first embodiment of a combustion device according to the present invention,

2 is a cross-sectional view showing a second embodiment of a combustion apparatus according to the present invention.

* Explanation of symbols on the main parts of the drawing

1: combustion body 2: fuel supply

3: air supply part 4: lower swirler

5: upper swirler 6: ignition

In order to achieve the above object, the present invention is a combustion apparatus body; A fuel supply device positioned at a predetermined position of the body; An air supply unit positioned at a predetermined position of the body; A lower swirler positioned at a predetermined position of the body; Upper swirlers positioned at a predetermined position above the lower swirler; Provided is a combustion device comprising an ignition device positioned at a predetermined position of the body.

In addition, the present invention, in order to achieve the above object, the fuel component supplied from the fuel supply device and the air supplied from the air supply unit and passed through the lower swirler is mixed and ignited by the ignition device to form a flame Maintained; Flame is formed to provide a combustion method comprising the step of passing through the upper swirler as the combustion proceeds.

The present invention also provides a method for selecting the shape and position of the upper swirlers and the lower swirler to achieve the above object.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

1 is a cross-sectional view showing an embodiment to which the present invention is applied, reducing pollution emissions such as carbon monoxide, nitrogen oxides and soot generated during combustion in gas and oil combustors, improving combustion efficiency, and easily maintaining and converting flame forms. To this end, a method of operating a combustor by dispersing combustion flow by applying a plurality of swirlers and a combustion apparatus to which the method is applied are as follows.

The combustion device includes a combustion device body 1 in which combustion proceeds; A fuel supply device 2 positioned at a predetermined position of the body; An air supply part 3 positioned at a predetermined position of the body; A lower swirler 4 positioned at a predetermined position of the body; Upper swirlers (5) positioned at a predetermined position above the lower swirler; It consists of an ignition device 6 located at a predetermined position of the body.

2 shows another embodiment of the combustion device according to the present invention, characterized in that the air supply unit 3 is located between the upper swirlers 5 and the lower swirler 4.

Referring to Figure 1 describes the operation of the combustion apparatus according to the present invention.

The fuel component supplied from the fuel supply device 2 and the air supplied from the air supply unit 3 and passed through the lower swirler 4 are mixed and ignited by the ignition device 6 to form a flame. Is maintained. As the flame is formed and the combustion progresses, the flame is not concentrated while passing through the upper swirlers 5, and the combustion proceeds as the flame is dispersed in a small size of extinguishing flame. The upper swirlers 5 are thus heated and kept at a high temperature.

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

First, the generation of nitrogen oxides is reduced because the flame is not concentrated in the combustion center but is dispersed and combusted into small extinguishing salts while passing through the upper swirlers.

Secondly, as the combustion proceeds, the upper swirlers are heated to maintain a high temperature. Thus, components that are not sufficiently burned between the lower and upper swirlers are burned while impinging on the upper swirlers, thereby reducing the generation of soot and carbon monoxide.

Third, a rapid volume expansion occurs after the partial combustion in the lower swirler and between the upper swirlers, resulting in a high velocity of the flow, thereby facilitating the mixing of the flow in the combustion apparatus, and uniformizing the temperature distribution. It becomes possible.

Fourth, by adjusting the distance between the lower swirler and the upper swirler it is possible to control the size of the small digestive salt and the generation of pollution emissions.

Claims (5)

A combustion device body; A fuel supply device positioned at a predetermined position of the body; An air supply unit positioned at a predetermined position of the body; A lower swirler positioned at a predetermined position of the body; Upper swirlers positioned at a predetermined position above the lower swirler; Combustor comprising an ignition device located at a predetermined position of the body. The combustor of claim 1, comprising a device capable of adjusting the position of the upper swirlers. The combustion apparatus according to claim 1 or 2, further comprising a device located between the upper swirlers and the lower swirler to supply air for promoting combustion and reducing pollutants. A fuel is supplied from the fuel supply device and air supplied from the air supply part and passed through the lower swirler are mixed, ignited by the ignition device, and a flame is formed and maintained; And a flame is formed and the combustion proceeds and is dispersed into a small fire extinguishing flame while passing through the upper swirlers. 5. The method of claim 4, further comprising the steps of controlling the position of the upper swirlers to control flame form and emissions; Supplying air between the upper swirlers and the lower swirler to control the shape and emissions of the flame.