JPH06193816A - Combustion chamber equipment - Google Patents

Abstract

PURPOSE:To enable completion of combustion by facilitation of mixing even in the case of low air ratio combustion and thereby to improve thermal efficiency, by providing a burner on one side of a combustion chamber and by disposing also a facilitating means of mixing of a combustion gas on the other side of the chamber at a prescribed distance from the burner. CONSTITUTION:A burner 2 is provided on one side of a combustion chamber 1, while a facilitating means 3 of mixing is disposed on the other side of the chamber at a prescribed distance from the burner 2. The mixing means 3 is constructed, for instance, of rod-shaped bodies 4 having arbitrarily-shaped sections and so provided as to pierce the combustion chamber 1 through. While a flame 8 is generated by the burner 2, air for combustion is introduced into the combustion chamber 1 and the combustion is started. At this time, a combustion reaction is facilitated by generating a turbulent flow in a combustion gas by the mixing facilitating means 3. For instance, a bluff-body effect is made to act for each of the rod-shaped bodies 4 and thereby a vortex flow is generated on the downstream side of each rod-shaped body 4. Thereby the combustion can be completed even in the case of low air ratio combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion chamber device for various heating devices.

[0002]

2. Description of the Related Art For example, in the case of a fire tube smoke tube boiler, a burner is installed at one end of a combustion chamber, fuel and air are introduced into the burner, and combustion is performed in the combustion chamber. After the combustion is completed in the combustion chamber, the combustion gas passes through the smoke pipe, absorbs heat, and is then discharged from the flue.

[0003]

In the above-mentioned conventional example, the combustion state of fuel and air, or the mixing state is determined by the performance and structure of the installed burner, and the flow velocity becomes slow especially at low load, so mixing is performed. The condition becomes worse, and the combustion cannot be completed unless the air is burned at a higher air ratio at a lower load. Therefore, it is necessary to control the air ratio according to the load or the burner performance. If high air combustion is performed, exhaust loss increases and thermal efficiency decreases.

[0004]

In order to solve the above-mentioned problems, the present invention provides a burner on one side of the combustion chamber, which is located on the side opposite to the burner and spaced from the burner. A mixing gas mixing promoting means is installed in the combustion chamber. Further, the present invention is characterized in that the mixing promoting means is a rod-shaped body having a combustion chamber penetratingly installed therein. Further, the present invention is characterized in that the mixing promoting means is a tubular body having a combustion chamber penetratingly installed therein, and a secondary air ejection hole for ejecting secondary air is formed in the tubular body. Further, the present invention is characterized in that the mixing promoting means is a plate-shaped body that penetrates through a combustion chamber, and that a plurality of the plate-shaped bodies are installed at intervals in the same cross section.

[0005]

When the flame is generated in the burner flame holding portion, the combustion air is introduced into the combustion chamber from the periphery of the burner and the combustion is started in the combustion chamber. The combustion gas reaches the front while burning, but at this time, in the combustion chamber, since the mixing promoting means is installed at a position opposite to the burner,
By this mixing promoting means, the combustion gas is brought into a turbulent state and the combustion reaction is promoted. For example, in the case of the mixing promoting means shown in FIG. 1, the bluff body effect is exerted on the downstream side of each rod-shaped body, and the mixing is markedly promoted to complete the combustion. In the case of FIG. 2, in addition to the mixing promotion, secondary air is ejected from the air holes of the tubular body, so the combustion in the burner can be a low air ratio combustion and a two-stage combustion. In the case of FIG. 3, effective mixed combustion can be achieved while colliding with the plate-shaped body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 is a combustion chamber, and 2 is a burner installed on one side of the combustion chamber 1. A mixing promoting means 3 is installed in the combustion chamber 1 on the opposite side of the burner 2 with a distance. As shown in FIG. 1, the mixing promoting means 3 is installed by penetrating the combustion chamber 1 with a rod-shaped body 4 having an arbitrary cross-sectional shape.
The rod-shaped body 4 can be combined and arranged in different sectional shapes freely. In the case of FIG. 2, a tubular body 5 is used as the mixing promoting means 3, and a secondary air hole 6 is formed in the tubular body 5. The ejection direction of the secondary air holes 6 can be freely determined. In the case of FIG. 3, the mixing promoting means 3 may be formed in the plate-like body 7, the plate-like bodies 7 may be arranged at intervals in the same cross section, and these may be formed in a plurality of rows in different cross sections. When the above-mentioned mixing promoting means 3 is installed at a place where the flame temperature is 1000 K or more, the oxidation temperature and the mixing promoting means 3
Synergistically act to achieve the completion of combustion effectively, and the effect is remarkable especially at low load.

Thus, at the same time when the flame 8 is generated in the burner 2, combustion air is introduced into the combustion chamber 1 from around the burner 2 and combustion is started in the combustion chamber 1. Combustion gas reaches the front while burning, but at this time, the burner 2
On the other hand, since the mixing promoting means 3 is installed at the front position on the opposite side, the mixing promoting means 3 causes the combustion gas to be in a turbulent state and promotes the combustion reaction. For example, in the case of the mixing promoting means 3 shown in FIG. 1, the bluff body effect works for each rod-shaped body 4, that is, a vortex is generated on the downstream side of the rod-shaped body 4, and the mixing is remarkably accelerated to complete the combustion. ..
In the case of FIG. 2, in addition to the mixing promoting means 3, secondary air is ejected from the air holes 6 of the tubular body 5, so that the combustion in the burner 2 is a low air ratio combustion and is a two-stage combustion. In addition to that, the effect of further disturbing the flow of the combustion gas by the jet of the secondary air can be obtained as compared with the case where the rod-shaped body 4 is simply installed, so that the combustion promoting effect is remarkable. In the case of FIG. 3, effective mixed combustion can be achieved while colliding with the plate-shaped body 7. In particular, the mixing promoting means 3 is set to a flame temperature of 1000
When it is installed at a position of K or higher, the oxidation temperature and the mixing promoting means 3 act synergistically to effectively achieve the completion of combustion, and the effect is remarkable especially at low load.

[0008]

Since the present invention is as described above, a low air ratio combustion can be realized regardless of the burner performance, and even in the low air ratio combustion, the completion of combustion can be easily achieved by promoting the mixing. In addition to the above, the flow velocity decreases especially at low load combustion, but by the action of the mixing means, the combustion can be completed and the thermal efficiency can be significantly improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Burner 3 Mixing promotion means 4 Rod-like body 5 Tubular body 6 Secondary air hole 7 Plate-like body 8 Flame 9 Flue

Claims (4)

[Claims] 1. A combustion chamber apparatus in which a burner is provided on one side of the combustion chamber, and a mixing gas mixing promoting means is installed in the combustion chamber on a side opposite to the burner and spaced from the burner. 2. The combustion chamber apparatus according to claim 1, wherein the mixing promoting means is a rod-shaped body having a combustion chamber penetratingly installed therein. 3. The combustion chamber according to claim 1, wherein the mixing promoting means is a tubular body having a combustion chamber penetratingly installed therein, and a secondary air ejection hole for ejecting secondary air is formed in the tubular body. apparatus. 4. The combustion chamber apparatus according to claim 1, wherein the mixing promoting means is a plate-like member that penetrates through the combustion chamber, and a plurality of plate-like members are installed at the same cross section with an interval.