JP2001074210A - Rotary surface combustion burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary surface combustion burner for uniformly heating an object to be heated having a substantially flat heating surface such as the bottom of a kettle. SOLUTION: A burner heats an object 11 to be heated having a flat surface 11a to be heated while rotating a burner main body 12 on a rotation axis which is vertically disposed with respect to the surface 11a. The main body 12 is located parallel to the surface to be heated, being extended in the direction of the center line which passes a center O, and has a burner combustion surface 13 of a substantially square shape which has a larger dimension in the circumferential direction as it distances from the center O.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary surface combustion burner for uniformly heating an object to be heated having a substantially flat heating surface such as a pot bottom.

[0002]

2. Description of the Related Art Conventionally, surface-burning burners (such as a Schburn burner and a metal fiber burner) which feed a premixed air of fuel and air into a porous ceramic or a heat-resistant alloy fiber mat and burn it on the surface. Are known.
In order to uniformly heat an object to be heated having a substantially planar heating surface, such as an iron plate or a pan, by using such a surface combustion burner, the combustion surface of the burner must be positioned at an equal distance from the heating surface of the object to be heated. It is required that the temperature distribution and the radiation distribution on the surface combustion burner surface be constant. For example, in the case where the object to be heated is heated while being fixed, as shown in FIGS. 5 and 6, a flat heated surface B of the object to be heated 2 is located immediately above the flat combustion surface F of the surface combustion burner 1.
Are arranged in parallel with the combustion surface F. However, in such a surface combustion burner 1, the amount of combustion (calorific value) per unit surface area is limited, and if it is less than a certain amount of combustion, there is a possibility that unburned substances such as CO may be generated or misfire may occur. Therefore, in order to burn the surface-to-be-heated object 2 by burning the surface combustion burner 1 with a minimum heat amount or less (a combustion amount per unit surface area is a minimum combustion amount or less),
It is possible to adopt a means of (1) partially reducing the surface area of the combustion surface F in the surface combustion burner 1 (see FIGS. 7 and 8) or (2) causing the surface combustion burner 1 to burn on / off. Conceivable.

[0003]

However, (1)
In the case of (1), the heating location is biased, and the temperature distribution deteriorates. On the other hand, in the case of (2), a disadvantage is that the temperature of the article 2 to be heated is changed by on-off combustion. Particularly, when heating is performed in the furnace, unburned gas or leakage in the furnace at the time of ignition is caused. Since the pre-purge for replacing the gas with air is performed, the range of the change is increased by the delay time until the reburn. In the case of changing the circumferential heating of the disc-shaped object to be heated 2 as shown in FIGS. 5 and 6 (for example, lowering the center and increasing the circumference), the surface combustion burner 3 may be provided with a plurality of concentric combustions. It is necessary to change the combustion amount by dividing the surface into F1, F2 and F3 so that the combustion can be adjusted by individually taking in the pre-mixed fuel and air, and it is necessary to change the amount of combustion. (See FIGS. 9 and 10). The present invention has been proposed to improve such a problem, and it is an object of the present invention to provide a rotary surface combustion burner for uniformly heating an object to be heated having a substantially flat heating surface such as a pot bottom. Aim.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for burning an object to be heated having a flat surface to be heated with a burner centered on a rotation axis perpendicular to the surface to be heated. A rotary surface combustion burner configured to rotate and heat a main body, wherein the burner main body extends parallel to a surface to be heated and in a direction of a center line passing through a center of the surface to be heated. The burner has a substantially square burner combustion surface whose dimension in the circumferential direction of rotation is increased as the distance from the center increases. The present invention is also a rotary surface combustion burner configured to heat an object to be heated having a flat surface to be heated by rotating a burner body around a rotation axis perpendicular to the surface to be heated. The burner body has a burner combustion surface extending in a direction of a center line passing in parallel with the surface to be heated and passing through the center of the surface to be heated. The heated surface was set to be heated with a desired heating distribution. In the above-described configuration, a stirring member can be provided on the burner main body so as to stir the surrounding atmosphere by rotating the burner main body.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of a rotary surface combustion burner according to the present invention will be described below with reference to the drawings. FIG. 1 shows a rotary surface burning burner 10.
This rotary surface combustion burner 10 rotates a heated object 11 having a flat heated surface 11a by rotating a burner main body 12 about a rotation axis perpendicular to the heated surface 11a of the heated object 11. And heated.
The burner main body 12 extends in parallel with the surface to be heated 11a and in the direction of a center line passing through the center O of the surface to be heated 11a. The burner has a substantially square burner combustion surface 13. The object to be heated 11 has a disk shape and has a flat heated surface 11a at the bottom. The burner body 12
Has a length slightly larger than the diameter of the object 11 to be heated, and is provided with an introduction portion 12a for introducing a premixture of fuel and air in the center. Although not shown, the burner main body 12 is configured to rotate around a central portion by appropriate drive control means. A material such as a porous ceramic body or a heat-resistant alloy fiber mat is mounted on the burner combustion surface 13 so that a premixed air of the fed fuel and air is jetted from the entire surface to form a flame on the surface. ing. Further, the burner combustion surface 13
As described above, the central portion has the narrowest shape, and the dimensions are set so that the width gradually increases toward both ends. Then, the burner main body 12 aligns the central portion, that is, the introduction portion 12a, with the axis L passing through the center O of the heated surface 11a of the heated object 11 in the vertical direction, and
The burner combustion surface 13 is arranged so as to rotate on a surface parallel to the heated surface 11a.

In the rotary surface combustion burner 10 configured as described above, the burner main body 12 is connected to the surface 11a to be heated.
About the axis L passing through the center O in the vertical direction. If a premixed mixture of fuel and air is sent to the combustion surface 13 of the burner body 12 and spread over the entire surface and ignited, the combustion surface 13
A substantially uniform flame is formed on the entire surface of the substrate, and surface combustion can be performed. In this case, the burner combustion surface 13 is dimensioned so as to gradually increase in width from the center to both ends.
Fluctuations in the amount of heat received on the heated surface 11a due to the difference in the movement distance of the burner combustion surface 13 per unit time near the center and near both ends are compensated, and the heated surface 11a can be uniformly heated.

The present invention can also be configured as follows. That is, the shape of the burner combustion surface can be set in order to bring the object to be heated 11 having the flat heated surface 11a into a heated state with a desired heating distribution. For example, the center side of the heated surface 11a of the heated object 11 is
To make the heating state higher in load than the surrounding side, as in the case of the rotary surface combustion burner 20 shown in FIG.
Are made to have the same width dimension throughout.

In this way, the central portion of the surface to be heated 11a receives a larger amount of heat than the peripheral portion, and the central portion of the surface to be heated 11a can be placed in a high-load heating state.

Further, the surface to be heated 1 of the object to be heated 11
In order to make the peripheral side of 1a a high-load heating state as compared with the central side, the combustion surface 32 of the burner main body 31 is made to have a width dimension S1 at both ends like a rotary surface combustion burner 30 shown in FIG. Is larger than the width S0 on the center side.

In this way, the amount of heat received on the peripheral side of the surface to be heated 11a is larger than that on the center side, and the peripheral side of the surface to be heated 11a can be in a high load heating state.
As described above, by setting the shape of the burner combustion surface,
Since the object to be heated 11 can be brought into a heated state with a desired heating distribution, it is possible to avoid a complicated fuel supply system and avoid complication of the system such as combustion control of the burner itself. It can be expected to improve versatility.

Further, according to the present invention, a stirring blade can be provided on the burner body so as to stir the surrounding atmosphere by rotating the burner body. As a result, the heating efficiency can be increased, and the temperature distribution can be further uniformed.

[0012]

As described above, according to the present invention, (1) when the combustion amount required for heating is low, the surface area of the surface combustion burner can be reduced while suppressing local heating. (2) By appropriately designing the shape of the surface combustion burner, the heating distribution in the circumferential direction of the rotating shaft can be optimized without using a complicated fuel supply system. (3) Compared with the method of rotating the object to be heated, the system can be simplified, general-purpose, and inexpensive. (4) The surrounding atmosphere is stirred by the rotating burner, and the temperature distribution is further improved.

[0013]

[Brief description of the drawings]

FIG. 1 is a schematic sectional explanatory view showing an example of a rotary surface combustion burner according to the present invention.

FIG. 2 is a schematic plan view of the rotary surface combustion burner shown in FIG.

FIG. 3 is a schematic plan view showing another example of the rotary surface combustion burner according to the present invention.

FIG. 4 is a schematic plan view showing another example of the rotary surface combustion burner according to the present invention.

FIG. 5 is a schematic sectional view showing an example of a current rotary surface combustion burner.

FIG. 6 is a schematic plan view of the rotary surface combustion burner shown in FIG. 5;

FIG. 7 is a schematic sectional view showing another example of the current rotary surface combustion burner.

FIG. 8 is a schematic plan view of the rotary surface combustion burner shown in FIG. 7;

FIG. 9 is a schematic sectional view showing another example of the current rotary surface combustion burner.

FIG. 10 is a schematic plan view of the rotary surface combustion burner shown in FIG. 9;

[Explanation of symbols]

10, 20, 30 Rotary surface burning burner 11 Heated object 11a Cylindrical inner wall 12, 21, 31 Burner main body 13, 23, 32 Burning surface 14, 22 Rotation axis

Claims (3)

[Claims] An object to be heated having a flat surface to be heated is
A rotary surface combustion burner in which a burner body is rotated around a rotation axis perpendicular to a heated surface of an object to be heated to heat the burner body, wherein the burner body is parallel to the surface to be heated and heated. A rotary surface combustion burner having a substantially square burner combustion surface extending in the direction of a center line passing through the center of the surface and increasing in size in the circumferential direction of rotation as the distance from the center increases. . 2. An object to be heated having a flat surface to be heated,
A rotary surface combustion burner in which a burner body is rotated around a rotation axis perpendicular to a heated surface of an object to be heated to heat the burner body, wherein the burner body is parallel to the surface to be heated and heated. It has a burner combustion surface extending in the center line direction passing through the center of the surface, and the size of the burner combustion surface in the circumferential direction of rotation is set so as to heat the surface to be heated with a desired heating distribution. A rotary surface combustion burner, characterized in that: 3. The rotary surface combustion burner according to claim 1, wherein a stirring member is provided on the burner main body so as to stir the surrounding atmosphere by rotating the burner main body.