JPH06313513A - Gun type burner - Google Patents

Abstract

PURPOSE:To provide a gun type burner whose flame stabilizing property is good and which can realize a stable combustion even during a small capacity operation without disturbing a smooth gasstream in a combustion cylinder. CONSTITUTION:In gun type burner, a base end of a combustion cylinder 10 is formed of a flame stabilizer 20 which is provided with an introduction hole 21 of liquid spray fuel in a central part and a swirling vane part 22 around the introduction hole 21, so that the liquid spray fuel from a spraying nozzle 30 is introduced into the combustion cylinder 10 through the introduction hole 21. On the other hand, air sent from a fan 70 is divided into at least two airstreams. A first airstream is introduced into the combustion cylinder 10 together with the liquid spray fuel through the introduction hole 21 and a second airstream is introduced into the combustion cylinder 10 while it is swirled through the swirling vane part 22. At this time, the airstream introduced into the combustion cylinder 10 through the introduction hole 21 is formed in a swirling airstream which swirls in the same direction as the swirling air-stream which is introduced into the combustion cylinder 10 through the swirling vane part 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gun type burner for spraying liquid fuel into a combustion cylinder by a spray nozzle to burn the liquid fuel in the combustion cylinder.

[0002]

2. Description of the Related Art FIG. 4 shows a sectional view of a conventional gun type burner, and FIG. 5 shows the gun type burner shown in FIG. The flame end is the base end face of the combustion tube 10.
The flame stabilizer 20 is provided with a liquid spray fuel introduction hole 21 in the center and a swirl vane portion 22 around the hole 21. On the front side of the flame stabilizer 20, a spray nozzle 30 is provided in front of the introduction hole 21 of the flame stabilizer 20 in such a manner that the ejection direction thereof is aligned with the central axis of the combustion tube 10. The outer peripheral space of the spray nozzle 30 is partitioned by a first partition cylinder 40,
The first air flow entering the partition tube 40 from the air inflow hole 41 of the first partition tube 40 is introduced into the combustion tube 10 together with the atomized fuel from the introduction hole 21 of the flame stabilizer 20. ing.
A second partition cylinder 50 is provided outside the first partition cylinder 40, and the air flow entering the partition cylinder 50 from the air inflow hole 51 of the second partition cylinder 50 is the first partition cylinder 50. Partition tube 40
Except for the one that further flows into the combustion cylinder 10, a second air flow passes through the swirl vane portion 22 of the flame stabilizer 20 to become a swirl air flow A and is introduced into the combustion cylinder 10. Further, a case for receiving the air sent from the blower 70 to the outside of the second partition tube 50.
60 is provided, and a part of the air entering the case 60 is the third
As the air flow of the combustion cylinder from the hole 11 in the wall surface of the combustion cylinder 10.
It is designed to be flown into within 10. 80 is an igniter.

[0003]

However, in the above-mentioned conventional gun type burner, the swirl vane portion 22 is introduced into the combustion cylinder 10 as the swirling air flow A, and the recirculation flow B is further generated in the combustion cylinder 10. As a result, the air flow returning near the center of the combustion tube 10 and the air flow C flowing in through the introduction hole 21 at the center of the flame stabilizer 20 face each other, whereby the recirculation flow B However, there is a drawback in that the flame holding property in the combustion cylinder 10 is deteriorated and the combustion cannot be stably performed especially in a small capacity operation.

In view of the above, the present invention solves the above-mentioned drawbacks of the prior art, does not impede the smooth flow of gas in the combustion cylinder, and therefore has good flame holding properties and stable combustion even in small capacity operation. The purpose is to provide a gun type burner that can

[0005]

The gun-type burner of the present invention which achieves the above-mentioned object is a flame stabilizer which has an inlet for introducing liquid atomized fuel in the center and a swirl vane around the inlet. A liquid atomized fuel from the atomizing nozzle is introduced into the combustion cylinder through the introduction hole in the central part of the flame stabilizer, and at least 2 air blown from the blower is formed.
The air stream is divided into two air streams, and the first air stream is introduced into the combustion cylinder together with the liquid atomized fuel through the introduction hole in the central portion of the flame stabilizer, and the second air stream is swirl vanes of the flame stabilizer. It is a gun type burner that is introduced into the combustion cylinder while swirling through the portion, and is burned in the combustion cylinder, and is introduced into the combustion cylinder together with the liquid atomized fuel from the introduction hole of the flame stabilizer center portion. It is characterized in that the introduced air flow is a swirling air flow swirling in the same direction as the swirling air flow introduced into the combustion cylinder through the swirl vane portion of the flame stabilizer.

[0006]

The air flow introduced into the combustion cylinder together with the liquid atomized fuel through the introduction hole in the central portion of the flame stabilizer is in the same direction as the swirling air flow introduced into the combustion cylinder through the swirl vane portion of the flame stabilizer. By making the swirling air flow swirl into the swirling air flow, the swirling air flow that flows in from the introduction hole and the swirling air flow that flows in from the swirling vane part become a swirling air flow that is a single flow as a whole, and the air is a frontal collision-like confusion. As a result, stable combustion with good flame retention is secured even in small capacity operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vertical cross sectional view of a gun type burner showing an embodiment of the present invention, FIG. 2 is a cross sectional view of an essential part of a first partition cylinder, and FIG. 3 is a view of FIG. 2 from above. is there.

The base end surface of the combustion cylinder 10 is composed of a flame stabilizer 20,
The flame stabilizer 20 is provided with a liquid spray fuel introduction hole 21 at the center and a swirl vane portion 22 at the periphery.
In front of the spray nozzle 30, a spray nozzle 30 is provided in front of the introduction hole 21 of the flame stabilizer 20 with its jet direction aligned with the central axis of the combustion cylinder 10, and the outer peripheral space of the spray nozzle 30 is the first partition cylinder. The first air flow that is partitioned by 40 and enters the partition tube 40 from the air inflow hole 43 of the first partition tube 40 is introduced into the combustion tube 10 through the introduction hole 21 of the flame stabilizer 20 together with the atomized fuel. Point to be
A second partition cylinder 50 is provided outside the first partition cylinder 40, and the air flow entering the partition cylinder 50 from the air inflow hole 51 of the second partition cylinder 50 is the first partition cylinder 50. Partition tube 40
The second partition cylinder except the one that further flows into the combustion chamber 10 as a second air flow through the swirl vane portion 22 of the flame stabilizer 20 to become the swirling air flow A. A case 60 for receiving the air sent from the blower 70 is provided outside the air blower 50, and a part of the air that has entered the case 60 is a third air flow from the hole 11 on the wall surface of the combustion tube 10. The configuration in which the gas is introduced into the combustion cylinder 10 is the same as the configuration described above.

In this embodiment, the first partition cylinder
A ring body 90 having a constant width is attached to one location in the longitudinal direction of 40 so as to be fitted onto the ring body 90, and a plurality of air inflow holes 91 are provided in the ring body 90 in the circumferential direction, and the first partition cylinder is provided.
In a portion where 40 of the air inflow hole 91 overlaps, a cut-and-raised piece 42 for guiding air in the circumferential direction in the same cut-and-raised direction as the swirl vane portion 22 of the flame stabilizer 20, and the cut-and-raised piece 42 is opened. The air inlet hole 43 is provided. The cut and raised piece
By 42, the air flow entering the first partition cylinder 40 swirls in the same direction as the swirling air flow A flowing into the combustion cylinder 10 through the swirl vane portion 22 of the flame stabilizer 20. Becomes Further, the amount of air flowing into the first partition cylinder 40 is adjusted by the air inlet hole 91 of the ring body 90. The air flow thus entering the first partition tube 40 flows into the combustion tube 10 as the swirling air flow D as the first air flow consisting of the swirling flow from the introduction hole 21 of the flame stabilizer 20. . Of course, the second air flow flowing in the second partition cylinder 50 becomes the swirling air flow A through the swirl vane portion 22 of the flame stabilizer 20, and the introduction hole 21
And the swirling air flow D from the above, and flows into the combustion cylinder 10 to become a recirculation flow B. The recirculation flow B and the swirling air flow D do not directly collide with each other and do not interfere with each other. Therefore, the recirculation flow B is stabilized, the flame holding state in the combustion cylinder is improved, and good combustion can be performed up to low capacity operation.

[0010]

According to the gun type burner according to the first aspect of the present invention, the present invention is introduced into the combustion cylinder together with the liquid atomized fuel from the introduction hole in the center of the flame stabilizer. Since the generated air flow is a swirling air flow that swirls in the same direction as the swirling air flow introduced into the combustion cylinder through the swirling blade part of the flame stabilizer, the air flow that flows in from the introduction hole and the swirling blade part that flows in The swirling air flow that forms a swirling air flow can be a single swirling air flow as a whole, and it is possible to eliminate mutual obstruction of the recirculating flow and the air flow entering from the introduction hole from the frontally colliding air flows. it can. Therefore, the recirculation flow is stable,
It is possible to perform good combustion up to low capacity operation with good flame retention.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional configuration diagram of a gun type burner showing an embodiment of the present invention.

FIG. 2 is a transverse cross-sectional view of a main part of a first partition cylinder.

FIG. 3 is a view of FIG. 2 seen from above.

FIG. 4 is a cross-sectional configuration diagram of a conventional gun type burner.

5 is a view of the gun-type burner shown in FIG. 4 as seen from the front of a combustion cylinder.

[Explanation of symbols]

 10 Combustion tube 20 Flame stabilizer 21 Introductory hole 22 Swirl vane section 30 Spray nozzle 40 First partition tube 42 Cut-and-raised piece 43 Air inlet hole 50 Second partition tube 60 Case 70 Blower 80 Igniter 90 Ring body 91 Air Inflow hole

Claims (1)

[Claims] 1. A base end face of a combustion cylinder is constituted by a flame stabilizer having an introduction hole for a liquid spray fuel in the center and a swirl vane portion provided around the introduction hole, and the liquid spray fuel from a spray nozzle is held by the flame stabilizer. While introducing into the combustion cylinder from the introduction hole in the center of the vessel,
The air sent from the blower is divided into at least two air streams, and the first air stream is introduced into the combustion cylinder together with the liquid atomized fuel from the introduction hole in the central part of the flame stabilizer, Is a gun-type burner adapted to be introduced into the combustion cylinder while being swirled through the swirl vane portion of the flame stabilizer, and to be burned in the combustion cylinder. The air flow introduced into the combustion cylinder together with the liquid atomized fuel from the air is a swirling air flow that swirls in the same direction as the swirling air flow introduced into the combustion cylinder through the swirl vanes of the flame stabilizer. Gun type burner.