JPH09133345A - Burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to intentionally regulate the flowing distribution of the air passed through a burner damper by movably constituting the front edge of a guide vane so disposed in an air supply passage to turn and straighten the air as to alter the angle to the flow of the air. SOLUTION: A guide vane 3 is disposed at the position where an air supply passage is changed from a horizontal route to a vertical route, the flow of the air flowing from a wind box 1 through a burner damper 2 in the passage is turned according to the alternation of the route, and straightened. Further, when the front edge 3a of the vane 3 is so made as to make it possible to be vertically rotated to alter the angle with respect to the flow of the air at the shaft 3b as a pivotal point, the edge 3a of the vane 3 is made movable, the position is made adjustable, and the air amounts flowing to the right and left of the vane 3 is made variable. Thus, the optimum air distribution can be obtained according to the burning state.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a burner for a boiler.

[0002]

2. Description of the Related Art FIG. 2 shows a structure of an air duct from a wind box to a burner in a conventional device.

The air that has passed through the burner damper 02 from the wind box 01 is rectified and rectified by the guide vanes 03, flows around the fuel pipe 04, reaches the burner nozzle 05, and is introduced into the furnace. The arrows in the figure indicate the flow of this air.

Generally, there are burners in which fuel and air are ejected from one nozzle and those in which only air is ejected. In the latter, the air is deflected and rectified by a guide vane to a burner nozzle. It is normal to reach.

[0005]

In the above-mentioned conventional apparatus, the air passing through the burner damper 02 is divided into upper and lower parts, and further left and right parts in the figure by the partition of the guide vanes 03, flows into the burner nozzle 05, and joins again. However, there may be a difference in the left and right flow rates.

On the other hand, when looking at the entire furnace, the combustion status of each burner is affected by other flames in the furnace and the temperature distribution and oxygen concentration distribution in the furnace. On the other hand, the individual air burners may not always have the optimum air distribution.

[0007] Such a situation is unfavorable, and the present invention aims to overcome such a situation and obtain an air flow distribution that can be intentionally adjusted.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, in which the front edge portion of a guide vane disposed in an air supply passage for diverting and rectifying air is angled with respect to the flow of air. By providing a burner configured to be movable, the movable structure of the leading edge of this guide vane makes it possible to change the air distribution in the left and right direction of each burner and adjust it to the optimum air distribution according to the combustion situation. It is possible to do.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 of the present invention based on FIG.
The form will be described.

Reference numeral 1 is a wind box, 2 is a burner damper, and the air exits the wind box 1 and passes through the burner damper 2 and flows through an air supply passage as indicated by an arrow in the figure.

Reference numeral 3 denotes a guide vane which is arranged at a position where the air supply path changes vertically from the horizontal path, and which changes and rectifies the air flow in accordance with the path change.

Reference numeral 3a is a front edge portion of the guide vane 3, which can be rotated up and down so as to change an angle with respect to an air flow as shown by a solid line and a broken line in the figure with the shaft 3b as a pivot point. Is configured. The rotation of the front edge portion 3a can be performed by an appropriate driving means from outside the route, although not particularly shown.

Reference numeral 4 is a fuel pipe, 5 is a burner nozzle, 6 is an air flow introduced into the furnace from the left side of the burner nozzle, and 7 is an air flow similarly introduced from the right side.

In the present embodiment thus constructed, for example, when it is desired to increase the air flow 6 on the left side of the nozzle 5, the front edge portion 3a is rotated in the direction shown by the broken line in the figure to guide the air flow. The amount of air flowing into the inner peripheral side of the vane 3 increases.

As a result, although there is a tendency that the flow rate difference between the left and right sides of the guide vane 3 is moderated to some extent due to the fuel pipe 4, the amount of air flow 6 blown from the left side of the burner nozzle 5 can be increased.

As described above, according to the present embodiment, the amount of air flowing into the left and right of the guide vane 3 can be changed, so that the optimum air distribution in the horizontal direction can be achieved according to the combustion state, and the low O ₂ Combustion, low NO _x and low unburned content combustion are possible.

Although the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to such an embodiment.
It goes without saying that various modifications may be made to the specific structure within the scope of the present invention.

[0018]

As described above, according to the present invention, by making the front edge of the guide vane movable and adjusting its position, it is possible to obtain the optimum air distribution depending on the combustion condition.

Therefore, according to the present invention, low O ₂ combustion and low N
O _x, it enables low unburned combustion, is extremely beneficial in industry.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a burner portion according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a conventional burner section.

[Explanation of symbols]

 3 Guide vanes 3a Front edge 5 Burner nozzle

Claims (1)

[Claims] 1. A burner characterized in that a front edge portion of a guide vane arranged in an air supply passage for diverting and rectifying air is movably configured so as to change an angle with respect to a flow of air.