JP2009192213A - Combustor and power generating device using the combustor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustor and a power generating device using the combustor capable of forming flame with high exoergic density while suppressing the discharge of a harmful matter. <P>SOLUTION: Multiple micro burners 20 forming micro flame being extremely little flame are closely spaced in a combustion part 25 provided in the center of a support plate 3 of the combustor 1. Since any of the micro flame is semi-spherical, an object to be heated can be brought close to a surface of the flame. By this, heat generated from the surface of the flame can be efficiently transferred to the object. Since the micro flame does not cause turbulent flow like common flame and its scale is small, the generation of the harmful matter is small. Since the micro flame has a diffusion advantage even if an orientation is changed, a semi-spherical shape can be constantly maintained. By this, the combustor 1 can be carried by a hand, and heating can be carried out by bringing the combustion part 25 close to a particular portion of the object such as an upper face or a side face in parallel with a heating object face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a combustor and a power generation device using the combustor, and more particularly to a combustor including a plurality of burners capable of forming a micro flame that is a micro flame and a power generation device using the combustor.

  Conventionally, a bunsen combustion type burner for a stove has been adopted as a stove which is a combustor for heating (for example, see Patent Document 1). This stove burner includes an annular burner body, and a large number of flame holes are arranged in the circumferential direction. Further, a mixing tube is integrally provided in the burner body, and a gas nozzle is disposed at the base of the mixing tube. Therefore, when the fuel gas is ejected from the gas nozzle, the primary air is supplied from the base portion by the ejection pressure of the fuel gas, mixed in the mixing tube, discharged from the flame hole of the burner body, and combusted.

JP 2000-193211 A

  However, the stove burner described in Patent Document 1 has a problem that a lot of wasteful heat is generated. For example, a large flame is not required to boil hot water. Furthermore, it is known that the heat generating parts are concentrated to a thickness of about 1 mm unless the flame combustion surface is in a special environment. In other words, regardless of whether the flame is large or small, heat generation occurs only "near the surface". Therefore, if a large calorific value is required, it is sufficient to simply increase the flame to increase the surface area, but there is a problem that wasteful heat generation increases. In addition, when turbulent flow occurs in the flame due to external disturbance or the like, many harmful substances such as unburned residue and soot are discharged, which is not preferable in terms of environmental hygiene.

  Further, in a general Bunsen burner, a diffusion flame is formed at the tip of a cylindrical main body that extends vertically, but if the main body is tilted, the flame is affected by buoyancy, so that the flame shakes or deforms. This is because diffusion flames generally have directivity in the opposite direction to gravity. Scientifically speaking, gravity-induced natural convection influences the combustion state through the diffusion field in the transport process in the combustion field. Therefore, in order to maintain the shape of the flame with the main body tilted, for example, the amount of ejection of the fuel gas may be increased, but this is not preferable because the fuel gas is wasted. In other words, in order to use a combustor equipped with a Bunsen burner at an angle, the amount of fuel gas ejected must be increased, which is one factor that hinders the development of a compact and easy-to-use combustor.

  The present invention has been made to solve the above-described problems, and provides a combustor capable of forming a flame having a high heat generation density while suppressing discharge of harmful substances, and a power generation apparatus using the combustor. For the purpose.

In order to achieve the above object, the combustor according to the first aspect of the present invention is a dimensionless Froude number, a Reynolds number Re, a fuel gas injection speed U (m / sec), and a tube inner diameter. When L (m), gravitational acceleration is g (m / sec ² ), and kinematic viscosity coefficient ν (m ² / sec), Fr = U (Lg) ^−1/2 > 1 and Re = ULν ⁻¹ By satisfying the relationship <100, a plurality of tubular burners that form a microframe that is a hemispherical micro flame not containing a luminous flame at the tip, a supporting means that supports the plurality of burners, and the plurality of burners And a fuel gas supply means for supplying each of the fuel gas.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the support means is a casing, and the plurality of burners are disposed on the tip side inside the casing. And a combustion portion formed by collecting the tips of the plurality of burners on the one surface. The fuel gas supply means is provided with a fuel gas supply port provided on a side wall of the casing, and provided inside the casing, and temporarily supplies the fuel gas supplied from the fuel gas supply port. It is comprised from the fuel gas chamber to store.

  In addition to the configuration of the invention according to claim 2, the combustor of the invention according to claim 3 has a burner interval obtained by subtracting the outer diameter of the burner from the distance between the central axes of the burners adjacent to each other. It is 0 mm or more, and the length from the one surface of the casing of the burner to the tip of the burner is 3.0 mm or more.

  According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect of the invention, the combustor is provided on the inner side of the casing in parallel with the one surface and partitions the fuel gas chamber. Provided with at least one partition wall forming a plurality of gas chambers, wherein the plurality of burners are composed of a plurality of burner groups each corresponding to the plurality of fuel gas chambers, and correspond to the fuel gas chamber closest to the one surface. In the burner group, the other end of the burner extends to the corresponding fuel gas chamber, and in the burner group corresponding to the fuel gas chamber located on the side opposite to the one surface side of the partition wall, The other end of the burner extends through the partition to the corresponding fuel gas chamber, and the gas supply port is provided at a position corresponding to each of the plurality of fuel gas chambers. Fuel gas The sheet inlet are connected fuel gas supply pipes each supplying a fuel gas from the outside, the said fuel gas supply pipe, the on-off valve is provided for opening and closing the inside flow path.

  Moreover, the combustor of the invention which concerns on Claim 5 adds to the structure of the invention of Claim 4, and the number of the said burners which comprise the said burner group differs for every said burner group, It is characterized by the above-mentioned.

  According to a sixth aspect of the present invention, in addition to the configuration of the fourth or fifth aspect, the on-off valve is an electromagnetic valve, and switching means for switching the thermal power of the combustion section; Control means for controlling the plurality of electromagnetic valves based on switching of the thermal power by the means.

  According to a seventh aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the combustor may further include a fuel gas supply unit configured to mix a mixed gas obtained by mixing oxygen or air with a fuel gas. Each of the plurality of burners is supplied.

  Further, a combustor according to an eighth aspect of the invention includes an oxidant gas supply means for supplying oxygen or air to the plurality of burners, in addition to the configuration of the invention according to the first aspect. A double-pipe structure having a cylinder and an outer cylinder, and a fuel gas passage through which fuel gas supplied from the gas supply means flows is formed inside the inner cylinder, and the inner cylinder and the outer cylinder Between the two, an oxidant gas flow path through which oxygen or air supplied from the oxidant gas supply means flows is formed.

  According to a ninth aspect of the present invention, in addition to the structure of the eighth aspect of the present invention, the support means is a casing, and the plurality of burners are disposed on the tip side inside the casing. And a combustion portion formed by collecting the tips of the plurality of burners on the one surface. A partition wall provided in parallel with the one surface is provided inside the housing, and the fuel gas supply means is inside the housing and opposite to the one surface side of the partition wall. A fuel gas chamber provided on a side of the casing, and a fuel gas supply port that is provided on a side wall of the casing and supplies fuel gas to the fuel gas chamber. An oxidant gas chamber provided on the inner surface and on the one surface side of the partition; and the housing. The other end of the outer cylinder opposite to the front end of the outer cylinder extends to the oxidant gas chamber. The oxidant gas supply port supplies oxygen or air to the oxidant gas chamber. The other end opposite to the tip of the inner cylinder passes through the partition wall and extends to the fuel gas chamber.

  A combustor according to a tenth aspect of the invention includes an oxidant gas supply means for supplying oxygen or air to each of the plurality of burners, in addition to the configuration of the invention according to the first aspect. The plurality of burners are formed in a tubular shape, the other end opposite to the tip side is accommodated inside the casing, and a plurality of through holes provided on one surface of the casing The front end of each of the plurality of burners is formed on the one surface, and a combustion portion is formed on the one surface. The combustion portion is formed between the inner edge of the through hole and the outer peripheral surface of the burner. A predetermined gap is provided between them, a partition provided in parallel with the one surface is provided inside the casing, and the fuel gas supply means is inside the casing, A fuel gas chamber provided on a side opposite to the one surface side, and a side of the housing Provided with a fuel gas supply port for supplying fuel gas to the fuel gas chamber, and the oxidant gas supply means is provided inside the casing and on the one surface side of the partition wall. An oxidant gas chamber and an oxidant gas supply port that is provided on a side wall of the housing and supplies oxygen or air to the oxidant gas chamber, and the other end opposite to the tip of the burner, The partition wall extends through the partition wall to the oxidant gas chamber, and the burner is fixed to and supported by the partition wall.

  In addition to the configuration of the invention according to claim 10, the combustor of the invention according to claim 11 has a length from the one surface of the casing of the burner to the tip of the burner of 1.0 mm or more. It is 0 mm or less, and the ratio of the area of the gap to the inner diameter area of the burner is 2.0 times or more.

  A combustor according to a twelfth aspect of the present invention is the combustor according to any one of the first to eleventh aspects, wherein the one surface of the casing is bent inward.

  According to a thirteenth aspect of the present invention, in addition to the configuration of the twelfth aspect of the present invention, the casing is formed in a cylindrical shape, and the one surface is an inner peripheral surface of the burner.

  According to a fourteenth aspect of the present invention, there is provided a power generation apparatus according to any one of the first to thirteenth aspects. A thermoelectric conversion element that converts the heat into electricity, and an element support means that is provided in the housing and supports the thermoelectric conversion element in proximity to the tips of the plurality of burners.

The combustor of the invention according to claim 1 includes a burner that satisfies the relationship of Fr = U (Lg) ^−1/2 > 1 and Re = ULν ⁻¹ <100. As a result, a so-called “microframe” which is a hemispherical micro flame not including a luminous flame can be formed at the tip of the burner. The microframe is characterized by forming a spherical flame at the tip of a tubular burner having an inner diameter of 1 mm or less regardless of the gravitational field. This is because the influence of gravity is relatively weakened as the size of the flame is reduced. Therefore, even if the burner is tilted, the shape of the microframe does not collapse. Furthermore, since the flame area of the hemispherical microframe is larger than that of a normal flame (laminar flame), the tropical volume per unit flame area can be increased.

  In addition, the micro flame does not cause turbulent flow like a general flame, and the scale is small, so there is little generation of harmful substances. Since the plurality of burners capable of forming such a microframe are supported by the supporting means, the heating object can be brought close to the plurality of microframes formed at the respective tips of the plurality of burners and heated. In this case, since the microframe is hemispherical, the heating object can be brought closer to the flame surface as compared with the laminar flame. Further, since the shape of the microframe of the burner is maintained even when the casing is tilted, for example, the combustor can be held in the hand and brought close to the object to be heated for heating. Further, since the fuel gas is supplied to the plurality of burners by the fuel gas supply means, combustion in each burner can be maintained.

  Moreover, in the combustor of the invention according to claim 2, in addition to the effect of the invention of claim 1, the fuel gas is supplied from the fuel gas supply port to the fuel gas chamber in the housing and temporarily stored. Since the fuel gas stored in the fuel gas chamber flows in from the other end side of the burner, a microframe can be formed on the front end side. Moreover, in the combustion part formed in one surface of the housing | casing, the flame surface which generate | occur | produces heat | fever collects. Therefore, the heating object can be efficiently heated by bringing the heating object close to the combustion section.

  In the combustor of the invention according to claim 3, in addition to the effect of the invention of claim 2, the burner interval is 3.0 mm or more, and the length from one surface of the burner casing to the tip of the burner Since it is 3.0 mm or more, it can prevent that a flame and a flame interfere and unite | combine.

  In the combustor of the invention according to claim 4, in addition to the effect of the invention of claim 2 or 3, the fuel gas chamber in the housing is partitioned into a plurality of fuel gas chambers by partition walls. Fuel gas is supplied to each fuel gas chamber via a fuel gas supply port. The fuel gas stored in each fuel gas chamber flows in from the other end side of the burner extended to the fuel gas chamber. Therefore, a plurality of micro frames can be formed in each burner group. Moreover, the number of burner groups to be burned and the number of burner groups to be extinguished can be freely adjusted by switching the opening / closing valves provided in the fuel gas supply pipes. That is, since the so-called “quantum control” is performed in which the thermal power of the combustion section is controlled by the number of micro flames, the thermal power can be adjusted safely and quickly without impairing the characteristics of the micro flames.

  Further, in the combustor of the invention according to claim 5, in addition to the effect of the invention of claim 4, the number of burners constituting the burner group is different for each burner group. By selecting, the firepower can be changed in stages.

  Moreover, in the combustor of the invention according to claim 6, in addition to the effect of the invention of claim 4 or 5, when the switching means switches the heating power, the control means controls each solenoid valve based on the switching. The switching of the thermal power in the combustion section can be performed quickly and promptly.

  In the combustor of the invention according to claim 7, in addition to the effect of the invention according to any one of claims 1 to 6, oxygen is mixed in the mixed gas supplied from the fuel gas supply means. Insufficient oxygen supply from the outside of the flame surface can be compensated for at the tip of the burner. Therefore, the microframes formed at the tips of the adjacent burners are united, and the reduction of the flame surface area and the generation of soot due to this can be prevented. Furthermore, since the tips of the plurality of burners can be concentrated, heat generation in the combustion section can be further improved.

  In the combustor of the invention according to claim 8, in addition to the effect of the invention of claim 1, the fuel gas supplied from the gas supply means flows into the fuel gas flow path provided inside the inner cylinder. . Therefore, a micro frame is formed at the tip of the inner cylinder. Then, oxygen or air supplied from the oxidant gas supply means flows into an oxidant gas flow path provided between the inner cylinder and the outer cylinder. Then, since oxygen or air flows so as to wrap around the outer periphery of the inner cylinder, oxygen or air can be supplied to the flame surface of the microframe formed at the tip of the inner cylinder. Therefore, it is possible to prevent the flame surface of the micro flame formed at the tip of the inner cylinder from becoming deficient in oxygen. That is, since the tips of the plurality of burners can be concentrated, heat generation in the combustion section can be further improved.

  In the combustor of the invention according to claim 9, in addition to the effect of the invention of claim 8, the inside of the housing is partitioned into a fuel gas chamber and an oxidant gas chamber by a partition wall. The fuel gas chamber is provided on the side opposite to the one surface where the burner of the partition wall is supported, and the oxidant gas chamber is provided on the one surface side of the partition wall. Fuel gas is supplied from the fuel gas supply port and stored in the fuel gas chamber. On the other hand, oxygen or air is supplied from the oxygen supply port and stored in the oxidant gas chamber. Since the fuel gas stored in the fuel gas chamber flows into the fuel gas flow path from the other end side of the inner cylinder of the burner, a microframe can be formed at the tip of the inner cylinder. On the other hand, the oxygen or air stored in the oxidant gas chamber flows into the oxidant gas flow path between the inner cylinder and the outer cylinder of the burner, so that oxygen does not enter the flame surface of the microframe formed at the tip of the inner cylinder. Or air can be supplied. Therefore, it is possible to prevent the flame surface of the micro flame formed at the tip of the inner cylinder from becoming deficient in oxygen. That is, since the tips of the plurality of burners can be concentrated, heat generation in the combustion section can be further improved.

  In the combustor of the invention according to claim 10, in addition to the effect of the invention of claim 1, the inside of the housing is partitioned into a fuel gas chamber and an oxidant gas chamber by a partition wall. The fuel gas chamber is provided on the side opposite to the one surface where the burner of the partition wall is supported, and the oxidant gas chamber is provided on the one surface side of the partition wall. Fuel gas is supplied from the fuel gas supply port and stored in the fuel gas chamber. On the other hand, oxygen or air is supplied from the oxygen supply port and stored in the oxidant gas chamber. Since the fuel gas stored in the fuel gas chamber flows into the fuel gas flow path from the other end of the burner, a microframe can be formed at the end of the burner. On the other hand, oxygen or air stored in the oxidant gas chamber flows into a gap formed between the outer periphery of the burner and the inner edge of the through hole, so that oxygen is introduced into the flame surface of the microframe formed at the tip of the burner. Or air can be supplied. Therefore, it is possible to prevent the flame surface of the micro flame formed at the tip of the burner from becoming deficient in oxygen. That is, since the tips of the plurality of burners can be concentrated, heat generation in the combustion section can be further improved.

  In the combustor of the invention according to claim 11, in addition to the effect of the invention of claim 10, the length of the burner is 1.0 mm or more and 8.0 mm or less, and the area of the gap with respect to the inner diameter area of the burner The ratio of the above is 2.0 times or more, so oxygen or air supplied to the oxidant gas chamber and fuel gas supplied to the fuel gas chamber are mixed without causing the flame to blow out or blow out. The mixing ratio can be equal compared to the stoichiometric mixing ratio or can be fuel lean. Thereby, it is possible to prevent the interference of the flame due to the lack of oxygen which occurs when the mixture ratio is rich in fuel.

  Further, in the combustor of the invention according to claim 12, in addition to the effect of the invention of any one of claims 1 to 11, the one surface of the casing is bent inward, so that, for example, When the surface is curved, one surface of the housing can be arranged so as to cover the surface. Thereby, the surface of a to-be-heated object can be heated evenly.

  In the combustor of the invention according to claim 13, in addition to the effect of the invention of claim 12, the casing is formed in a cylindrical shape, and one surface on which the combustion part is formed is the inner peripheral surface of the burner. Therefore, for example, when heating a rod-shaped object to be heated, the object to be heated is inserted and arranged inside the housing. Thereby, the surface of a rod-shaped to-be-heated object can be heated evenly.

  Further, in the power generation device of the invention according to claim 14, the element support means makes the thermoelectric conversion element close to the flame surface of the microframe, that is, a flame having a high heat generation density formed at each end of the plurality of burners, that is, the heat generation surface. Therefore, the heat generated from the flame surface of the micro flame can be efficiently converted into electricity.

1 is a perspective view of a combustor 1 (first embodiment). 1 is a plan view of a combustor 1. FIG. 1 is a front view of a combustor 1. FIG. FIG. 3 is a cross-sectional view taken in the direction of arrows II in FIG. 2. 4 is a photograph showing a micro frame (MF) formed at the tip of the micro burner 20. 2 is a schematic diagram showing a configuration of a burner interval measuring device 400. FIG. It is a graph which shows the result of a 1st test. It is a table | surface which shows the result of a 2nd test. It is a table | surface which shows the result of a 3rd test. It is a photograph which shows the combustion state of a combustor (burner height = 0 mm). It is a photograph which shows the combustion state of a combustor (burner height = 2.0mm). It is a photograph which shows the combustion state of a combustor (burner height = 3.0mm). It is a fragmentary sectional view (2nd Embodiment) of the combustor 100. FIG. It is a fragmentary sectional view showing a part of combustor 160 which is the 1st modification. It is a graph which shows the result of a 4th test. It is a perspective view (to-be-heated material P is heated) of the combustor unit 260 which is a 2nd modification. It is a perspective view which shows the inner side of the combustor 260A. It is the elements on larger scale which fractured a part of combustor 260A. It is a top view of the combustor 280 which is a 3rd modification. It is sectional drawing (3rd Embodiment) of the combustor 200. FIG. 3 is a flowchart of a thermal power control process by a CPU of a controller 60. It is a figure which shows the modification of the arrangement | positioning aspect of the micro burner. 3 is a perspective view of a power generation device 300 including a thermoelectric conversion element 130. FIG.

  Hereinafter, first to third embodiments of a combustor embodying the present invention will be described with reference to the drawings. First, the combustor 1 of 1st Embodiment is demonstrated with reference to FIG. 1 thru | or FIG.

  First, the structure of the combustor 1 will be described. As shown in FIGS. 1 to 3, the combustor 1 includes a substantially rectangular parallelepiped casing 2. The housing 2 includes a front wall 5, a right side wall 6, a left side wall 7, a back wall 8, and a bottom wall 9, and a support plate 3 having a rectangular shape in plan view is attached so as to close the open upper surface. Through holes (not shown) are provided at the four corners of the support plate 3, and screw holes (not shown) are provided at the four corners of the upper end of the housing 2 corresponding to these. Accordingly, the support plate 3 is placed on the opening end of the housing 2 and the fixing screw 10 is fastened to the screw hole through the through hole, so that the support plate 3 is fixed to the opening end of the housing 2 without a gap.

  As shown in FIGS. 1, 3, and 4, a circular fuel gas supply port 12 that penetrates horizontally inside the housing 2 is provided at the upper center of the front wall 5 in the width direction. . The fuel gas supply port 12 is connected to a downstream end of a fuel gas supply pipe (not shown). Further, as shown in FIG. 4, a fuel gas chamber 15 for temporarily storing fuel gas supplied from the fuel gas supply pipe via the fuel gas supply port 12 is provided inside the housing 2. ing.

  In the center of the support plate 3, 100 micro burners 20 that are formed in an extremely thin tube and each form a micro flame at the tip are arranged in a plan view of 10 × 10 (see FIG. 2). Thus, the tip ends are supported at equal intervals in a state of protruding upward. The micro burners 20 are respectively inserted into 100 through holes (not shown) provided in the center of the support plate 3 in a 10 × 10 arrangement in plan view, and are fixed with an adhesive. The heights of the tips of the 100 micro burners 20 are aligned, and a combustion portion 25 that is a flat heating surface is formed at the center of the support plate 3. The heating surface of the combustion unit 25 is not limited to a flat surface and may be a curved surface. That is, it can be changed to various shapes by changing the height of each tip of the micro burner 20 or by making the support plate 3 a curved surface and supporting the micro burner 20 toward the normal direction of the curved surface. . Moreover, you may match | combine with the shape of the target object to heat.

  Furthermore, as shown in FIG. 4, in the fuel gas chamber 15 of the housing 2, the lower half of each microburner 20 protrudes vertically downward from the back surface of the support plate 3. Therefore, the fuel gas supplied into the housing 2 from the fuel gas supply port 12 and stored in the fuel gas chamber 15 flows inward from the lower side of each microburner 20 and is ejected from the tip. And the hemispherical micro flame | frame is formed by igniting the front-end | tip from which the fuel gas ejects.

  Next, the micro burner 20 will be described. As shown in FIGS. 1 and 5, the micro burner 20 is an extremely fine burner formed in a tubular shape having an inner diameter of 0.7 mm in this embodiment. At the tip of the micro burner 20, a hemispherical micro flame that does not include a luminous flame, a so-called “micro frame” is formed. Luminous flame refers to flames in which fine carbon particles (soot) produced by the decomposition of fuel, such as candle flames, are shining.

  Here, the microframe will be described. As shown in FIG. 5, the micro frame (MF) is a hemispherical micro flame that does not include the bright flame formed at the tip of the micro burner 20. The microframe is generally characterized in that it forms a flame of several millimeters, and the diffusion force dominates the transport process as the scale down. A normal flame (laminar flame) is deformed by the influence of buoyancy depending on the orientation, but the microframe is not deformed. In other words, the hemisphere can always be maintained in any direction. Since the size of the microframe is the smallest size capable of holding the flame, the heat generation volume occupies the largest volume in the flame volume, and can be said to be a so-called “flame piece” or “flame lump”. Further, the micro flame does not cause a turbulent flow like a general flame and has a small scale, and therefore has a characteristic that the generation of harmful substances such as unburnt residue and so on is small.

  In the present embodiment, the micro burner 20 that can form such a micro frame satisfies the following relational expression.

Fr is the dimensionless number Fr, Reynolds number is Re, fuel gas ejection speed is U (m / sec), pipe inner diameter is L (m), gravity acceleration is g (m / sec ² ), kinematic viscosity coefficient When ν (m ² / sec),
Fr = U (Lg) ^−1/2 > 1 and Re = ULν ⁻¹ <100

  Moreover, as a material of the micro burner 20, a material (for example, stainless steel etc.) with high heat resistance and low heat conductivity is mentioned. Preferably, fine ceramics mainly composed of alumina is effective. When fine ceramics are used, the heat loss of the flame to the micro burner 20 can be reduced.

  Furthermore, the surface of the micro burner 20 may be coated with a platinum catalyst. Thereby, hydrogen generated in the elementary reaction process oozes out upstream from the tip of the micro burner 20 and reacts with the platinum catalyst applied to the outer peripheral surface of the tip of the burner. Since the heat generated by the catalytic combustion reaction at this time produces an effect of the heat insulating wall, the extinguishing region can be narrowed and the stabilization of the flame can be promoted.

  Next, a method for using the combustor 1 having the above structure will be described. First, a downstream end of a fuel gas supply pipe (not shown) connected to a gas plug (not shown) is connected to the fuel gas supply port 12 of the combustor 1 shown in FIG. The fuel gas supply pipe is provided with an adjustment valve (not shown) that can adjust the fuel gas flow rate in the pipe. By adjusting this adjustment valve, the fuel gas ejection speed U (m / sec) in the micro burner 20 is adjusted. Note that methane, butane, propane, or the like can be used as the fuel gas.

  Next, the gas plug is opened, and the fuel gas is supplied into the casing 2 of the combustor 1 through the fuel gas supply pipe. The fuel gas flows into the fuel gas chamber 15 (see FIG. 4) through the fuel gas supply port 12 of the housing 2. The fuel gas stored in the fuel gas chamber 15 flows inward from the lower end side of each micro burner 20 by the pressure of the fuel gas supplied from the fuel gas supply pipe. Then, since fuel gas is ejected from the tip of each micro burner 20, all the micro burners 20 are ignited by an ignition device (not shown). As the ignition device, a lighter, an igniter used in a water heater or the like can be used. As a result, a hemispherical microframe is formed at the tip of each microburner 20 to form a combustion section 25 that is a flat heating surface.

  And it can heat by making the target object to heat close to the combustion part 25 of the combustor 1 from the upper side. In the combustion unit 25, 100 microframes are formed, but since all of them are hemispherical, the object can be brought close to the surface vicinity. Thereby, the heat generated from the flame surface of the micro flame can be efficiently transmitted to the object. In addition, when the object to be heated cannot be transported or when it is desired to heat a specific part of an object, the microframe can always hold a hemisphere even if the orientation is changed. It is also possible to heat the combustor 25 close to the object or its specific part. Further, even if the direction of the micro frame is changed, the gas ejection speed U may remain constant, so that unnecessary gas consumption does not occur. Therefore, it is possible to provide a combustor 1 that is easy to use and does not cause unnecessary gas consumption as compared with a conventional mounting type combustor, an injection burner, or the like.

  As described above, the combustor 1 according to the first embodiment includes the housing 2 whose upper surface is opened, and the support plate 3 is fixed so as to close the upper surface where the opening is opened. At the center of the support plate 3, 100 micro burners 20 forming a micro frame at the tip are supported in a state where each tip protrudes upward to form a combustion part 25 that is a flat heating surface. Yes. In this embodiment, the micro burner 20 is a tubular ultra-fine burner having an inner diameter of 0.7 mm. A hemispherical microframe that does not include a bright flame is formed at the tip of the microburner 20. The microframe is generally characterized in that it forms a flame of several millimeters, and the diffusion force dominates the transport process as the scale down. Therefore, even if the direction of the micro burner 20 is changed, the micro frame is not deformed, and always maintains a hemispherical shape in any direction. In addition, it does not cause turbulent flow like a general flame, and its scale is small.

  When using the combustor 1 having a plurality of such micro burners 20, the object to be heated can be heated by bringing the object to be heated from the upper side closer to the ignited combustion unit 25. In the combustion unit 25, 100 microframes are formed, but since all of them are hemispherical, the heating object can be brought close to the vicinity of the surface thereof. Therefore, the heat generated from the flame surface of the micro flame can be efficiently transmitted to the object to be heated. Moreover, the combustor 1 can be held in the hand and the combustion unit 25 can be heated close to a specific portion of the heating target surface such as an upper surface or a side surface of the heating target in parallel with the heating target surface. This is because the micro-frame has a diffusion advantage even if the orientation is changed, and can always hold the hemisphere. Further, even if the direction of the micro frame is changed, the fuel gas ejection speed U may remain constant, so that unnecessary gas consumption does not occur. Therefore, it is possible to provide a combustor 1 that is easy to use and does not cause unnecessary gas consumption as compared with a conventional mounting type combustor, an injection burner, or the like.

  Next, in order to prevent the flames of the burners adjacent to each other from interfering with each other, the burner interval and the burner length were examined. Here, three tests were performed, and optimum conditions for the burner interval and the burner length were determined. The contents of each test are as follows.

First test: A test for examining the burner interval that causes the interference phenomenon of the flame while changing the fuel flow rate.
-Second test: A test for examining the burner spacing at which the flame does not interfere in the combustor.
Third test: A test to check the burner height at which the flame does not interfere with the combustor.
Hereinafter, the first to third tests will be sequentially described.

  First, a 1st test is demonstrated with reference to FIG. 6, FIG. The flame formed by the combustor 1 (see FIG. 1) according to the first embodiment is a diffusion flame (see FIG. 5). Therefore, when the space | interval of the mutually adjacent micro burners 20 is narrow, the flame and flame which are each formed in each micro burner 20 approach. In this case, oxygen shortage occurs between the flames, so that the flame surface existing between the flames disappears and an interference phenomenon occurs in which the flames merge. Thus, in the first test, the burner interval measuring apparatus 400 shown in FIG. 6 was used to examine the burner interval that causes the flame interference phenomenon while changing the fuel flow rate. The “burner interval” refers to a distance obtained by subtracting the outer diameter of the micro burner from the distance between the central axes of the adjacent micro burners.

  Here, the configuration of the burner interval measuring apparatus 400 will be described. As shown in FIG. 6, the burner interval measuring apparatus 400 includes a digital caliper 401 that accurately measures the distance between two points. Two micro burners 20 are fixed to the measured object support portion of the digital caliper 401, and the other micro burner 20 can be brought into contact with and separated from one micro burner 20. Further, the burner interval measuring device 400 is connected to a cylinder 402 for storing fuel gas, a regulator 403 connected to the cylinder 402 via a pipe 410, and a downstream side of the regulator 403 via a pipe 411. A mass flow controller 404 for adjusting the flow rate of the fuel gas is provided. A branch pipe 412 is connected to the mass flow controller 404, and two downstream ends branched into two flow paths are connected to the two micro burners 20 and 20, respectively.

  In the burner interval measuring apparatus 400 having such a configuration, the flow rate of the fuel gas supplied from the cylinder 402 is adjusted by the regulator 403 and the mass flow controller 404 and supplied to the micro burners 20 and 20, respectively. And the front-end | tip of each micro burner 20 is ignited and the micro flame which is a spherical flame is formed, respectively. In this state, a digital caliper 401 was used to study the burner interval at which the flame interferes by gradually narrowing or separating the interval between the two micro burners 20. The examination was conducted while changing the fuel flow rate per microburner. In the first test, the outer diameter of the micro burner 20 was adjusted to 1.0 mm and the inner diameter was 0.7 mm, and methane was used as the fuel gas.

  Next, the results of the first test will be described with reference to FIG. In FIG. 7, “●” indicates data when the micro burner 20 is brought closer, and “▲” indicates data when the micro burner 20 is moved away. As shown in FIG. 7, the greater the fuel flow rate, the longer the burner interval that does not cause interference. There was no significant difference in data between when the micro burner 20 was moved closer and when it was moved away.

  As shown in FIG. 6, in the measurement environment of the first test, there is no wall surface like the support plate 3 (see FIG. 1) of the combustor 1 below the tip of the micro burner 20, There are only two micro burners 20, and furthermore, the fuel is methane, which is extremely ideal. As shown in FIG. 7, in such an environment, the fuel flow rate capable of reliably forming a spherical flame was 4 SCCM (dotted line in the figure). In other words, it was found that a burner interval of at least 1.5 mm or more is necessary to prevent flame interference. In addition, when the burner interval is 3.0 mm, the flow rate range in which the spherical microframe is formed without interference between adjacent flames is 4.0 to 15.5 SCCM (indicated by R in FIG. 7). range).

  Next, the second test will be described with reference to FIG. In the second test, the burner interval at which the flame does not interfere was examined using the same combustor as in the first embodiment. In the following description, in the combustor, the distance from the support plate of the micro burner to the tip that protrudes is called “the height of the micro burner” or “the height of the burner”.

  In the second test, the height of the micro burner 20 was sufficiently increased to 6.0 mm in order to examine the interference phenomenon of the flame caused by the burner interval. Then, four types of micro burners having burner outer diameters of 0.50 mm, 1.0 mm, 2.0 mm, and 3.0 mm were prepared, and the burner intervals were adjusted to 2.0 mm, 3.0 mm, and 4.0 mm, respectively. Different types of combustors were created. In each combustor, the case where there was no flame interference phenomenon was evaluated as “◯”, and the case where the interference phenomenon occurred was evaluated as “x”. The fuel flow rate was adjusted so that the smallest spherical microframe was formed according to the burner outer diameter.

  Next, the results of the second test will be described. As shown in FIG. 8, when the burner interval was 2.0 mm, all were “x” regardless of the burner outer diameter, and an interference phenomenon occurred. When the burner interval was 3.0, all were “◯” regardless of the burner outer diameter, and no interference phenomenon occurred. When the burner interval was 4.0 mm, all were “◯” regardless of the burner outer diameter, and no interference phenomenon occurred.

  From these results, it was found that the burner spacing is required to be at least 3.0 mm or more in order to prevent flame interference at any burner outer diameter of any micro burner. This is presumably because the flame limit such as the flame extinguishing distance and flame zone thickness is the main factor, and the interference limit is determined.

  Next, the third test will be described with reference to FIGS. In the third test, the same combustor as that of the first embodiment was used to examine the height of the micro burner at which the flame does not interfere.

  In the third test, the burner interval of the micro burner was fixed to 3.0 mm in order to examine the flame interference phenomenon caused by the height of the micro burner. Then, four types of micro burners having burner outer diameters of 0.50 mm, 1.0 mm, 2.0 mm, and 3.0 mm are prepared, and the burner heights are 0 mm, 2.0 mm, 3.0 mm, 4.0 mm, and 5 mm. 24 types of combustors adjusted to 0.0 mm and 6.0 mm were prepared. In each combustor, the case where there was no flame interference phenomenon was evaluated as “◯”, and the case where the interference phenomenon occurred was evaluated as “x”. The fuel flow rate per microburner was adjusted so that the smallest spherical microframe was formed according to the outer diameter of each burner.

  Next, the results of the third test will be described. As shown in FIG. 9, when the burner height was 0 mm, all were “x” irrespective of the burner outer diameter, and an interference phenomenon occurred. As shown in the photograph shown in FIG. 10, the individual flames interfered with each other, resulting in a combustion state similar to that of one flame. When the burner height was 2.0 mm, all were “x” regardless of the burner outer diameter, and an interference phenomenon occurred. As shown in the photograph in FIG. 11, a plurality of flames interfered and merged. When the burner height was 3.0 mm, all were “◯” regardless of the burner outer diameter, and no interference phenomenon occurred. As shown in the photograph in FIG. 12, all the flames were independent, and a good combustion state could be secured. When the burner height was 4.0 mm, all were “◯” regardless of the burner outer diameter, and no interference phenomenon occurred. When the burner height was 5.0 mm, regardless of the burner outer diameter, all were “◯”, and no interference phenomenon occurred. When the burner height was 6.0 mm, all were “◯” regardless of the burner outer diameter, and no interference phenomenon occurred.

  From these results, it was found that at any burner outer diameter of any micro burner, the burner height needs to be at least 3.0 mm or more in order to prevent flame interference.

  From the results of the above first, second, and third tests, if the burner spacing is at least 3.0 mm and the burner height is at least 3.0 mm, a good microscopic effect can be obtained without causing a flame interference phenomenon. It has been demonstrated that a frame can be formed.

  Next, the combustor 100 which is 2nd Embodiment is demonstrated with reference to FIG. In the first embodiment, oxygen shortage may occur when the interval of the micro burners 20 is increased in the combustion unit 25 to increase the degree of congestion. In this case, there is a disadvantage that the microframe cannot be held and is combined with the adjacent flame. Therefore, the combustor 100 of the second embodiment includes a micro-burner 40 having a double tube structure including an inner cylinder and an outer cylinder, and is configured to be able to forcibly supply an oxidant gas (oxygen or air). Thus, the feature is that the oxygen shortage of the micro burner that is densely packed in the combustion section can be solved.

  As shown in FIG. 13, the combustor 100 includes a housing 30 having a basic structure of the housing 2 (see FIGS. 1 to 4) of the combustor 1 of the first embodiment. A partition wall 35 having a surface parallel to the support plate 33 and the bottom wall 32 and disposed at a middle position in the height direction of the housing 30 is provided inside the housing 30. An oxidant gas supply port 54 penetrating above the partition wall 35 is provided on the upper stage of the front wall 31 of the housing 30, and a pipe 57 is inserted into the oxidant gas supply port 54. The pipe 57 is connected to a downstream end of an oxidant gas supply pipe (not shown) of an oxygen production apparatus (not shown). On the other hand, a lower part of the front wall 31 is provided with a fuel gas supply port 55 penetrating below the partition wall 35, and a pipe 58 is inserted into the fuel gas supply port 55. The pipe 58 is connected to a downstream end portion of a fuel gas supply pipe (not shown) connected to a gas stopper (not shown).

  Further, inside the housing 30, an oxidation for temporarily storing an oxidant gas such as oxygen or air supplied into the housing 30 through the oxidant gas supply port 54 is provided above the partition wall 35. An agent gas chamber 51 is provided. A fuel gas chamber 52 for temporarily storing the fuel gas supplied into the housing 30 via the fuel gas supply port 55 is provided below the partition wall 35.

  A plurality of micro burners 40 having a double-pipe structure are supported on the support plate 33 at regular intervals with each tip side protruding upward. The micro burner 40 includes an inner cylinder 41 and an outer cylinder 42 that surrounds the inner cylinder 41 in the radial direction. The inner cylinder 41 passes through the support plate 33 and the partition wall 35, and the lower end side extends to the fuel gas chamber 52. On the other hand, the outer cylinder 42 penetrates only the support plate 33, and the lower end side extends to the oxidant gas chamber 51. Further, a fuel gas channel 45 is formed inside the inner cylinder 41, and an oxidant gas channel 46 is formed between the inner cylinder 41 and the outer cylinder 42.

  In the combustor 100 having such a structure, the fuel gas supplied from the fuel gas supply pipe flows into the fuel gas chamber 52 through the fuel gas supply port 55. The fuel gas stored in the fuel gas chamber 52 flows into the fuel gas passage 45 from the lower end side of the inner cylinder 41 of the micro burner 40 due to the pressure of the fuel gas supplied from the fuel gas supply pipe. Then, fuel gas is ejected from the tip of the inner cylinder 41 and ignited to form a microframe. On the other hand, the oxidant gas supplied from the oxidant gas supply pipe flows into the oxidant gas chamber 51 through the oxidant gas supply port 54. The oxidant gas stored in the oxidant gas chamber 51 flows into the oxidant gas flow path 46 between the outer cylinder 42 and the inner cylinder 41 of the micro burner 40 due to the feeding pressure from the oxidant gas supply pipe. Then, the oxidant gas is forcibly supplied so as to surround the periphery of the microframe formed at the tip of the inner cylinder 41. Thereby, it is possible to prevent oxygen shortage at the tip of the inner cylinder 41. Therefore, even if the micro burners 40 are densely packed, oxygen can be sufficiently supplied, so that adjacent micro frames do not merge. Therefore, since more micro burners 40 can be densely packed, the combustor 100 having a large heat generation density can be provided.

  As described above, the combustor 100 of the second embodiment includes the micro burner 40 having a double tube structure. The micro burner 40 includes an inner cylinder 41 and an outer cylinder 42. A fuel gas flow path 45 is formed inside the inner cylinder 41, and an oxidant gas flow is interposed between the inner cylinder 41 and the outer cylinder 42. A path 46 is formed. On the other hand, an oxidant gas chamber 51 and a fuel gas chamber 52 partitioned by a partition wall 53 are provided inside the housing 30. The fuel gas that has flowed into the fuel gas chamber 52 flows into the fuel gas channel 45 from the lower end side of the inner cylinder 41 of the micro burner 40 and is ejected from the tip of the inner cylinder 41. Accordingly, a micro frame is formed at the tip of the inner cylinder 41. On the other hand, the oxidant gas that has flowed into the oxidant gas chamber 51 flows into the oxidant gas flow path 46 between the outer cylinder 42 and the inner cylinder 41, and around the microframe formed at the tip of the inner cylinder 41. Supplied to surround. Thereby, it is possible to prevent oxygen shortage at the tip of the inner cylinder 41. That is, even if the micro burners 40 are densely packed, adjacent micro frames do not merge with each other, so that more micro burners 40 can be densely packed. Therefore, the combustor 100 having a large heat generation density can be provided.

  Next, a combustor 160, which is a first modification of the second embodiment, will be described with reference to FIG. The combustor 160 has the same structure as the combustor 100, but the structure of the micro burner 170 is different from the structure of the micro burner 40 of the first embodiment. That is, the micro burner 40 has a double tube structure (see FIG. 13), but the micro burner 170 of the combustor 160 is a single tube.

  As shown in FIG. 14, the combustor 160 includes a housing 162. A partition wall 165 having a surface parallel to the combustion surface forming plate 163 that is the top wall and disposed at the middle position in the height direction of the housing 162 is provided inside the housing 162. An oxidant gas chamber 166 is provided above the partition 165, and a fuel gas chamber 167 is provided below the partition 165.

  The combustion surface forming plate 163 is provided with a plurality of through holes 164 at predetermined positions. A plurality of micro burners 170 are inserted into the through holes 164 with their tips protruding upward, and the lower end side extends through the partition wall 165 to the fuel gas chamber 167. That is, the micro burner 170 is supported by the partition 165. Further, a predetermined gap 169 is formed between the through hole 164 and the outer peripheral surface of the micro burner 170. The gap 169 communicates with the oxidant gas chamber 166.

  Also in the combustor 160 having such a structure, the fuel gas that has flowed into the fuel gas chamber 167 flows from the lower end side of the micro burner 170 by the pressure of the fuel gas fed from the fuel gas supply pipe. Then, fuel gas is ejected from the tip of the micro burner 170 and ignited to form a micro frame. On the other hand, the oxidant gas that has flowed into the oxidant gas chamber 166 flows out of the gap 169 between the microburner 170 and the inner edge of the through hole 164 due to the pressure fed from the oxidant gas supply pipe, and is formed at the tip of the microburner 170. The oxidant gas is forcibly supplied so as to surround the periphery of the microframe. This can prevent oxygen shortage at the tip of the micro burner 170. Therefore, even if the micro burners 170 are densely packed, oxygen can be sufficiently supplied, so that adjacent micro frames do not merge. Therefore, since more micro burners 170 can be densely packed, the combustor 160 having a large heat generation density can be provided.

  By the way, if oxygen or air supplied to the oxidant gas chamber 166 and the fuel gas supplied to the fuel gas chamber 167 are mixed at an excessive mixing ratio, for example, a large number of them are arranged densely. In the micro burner, oxygen deficiency occurs at the tip of the micro burner in the center, causing a flame interference phenomenon. Therefore, it is necessary to supply at a flow rate ratio which is equal to the stoichiometric mixing ratio or is a fuel lean.

  On the other hand, if the flow rate of oxygen or air ejected from the tip of the micro burner 170 is too large, blowout occurs. That is, it is estimated that when the flow rate of oxygen or air increases, the flame base becomes diluted and the flow rate increases at the flame base. This blow-off limit is less dependent on the height of the micro burner 170, but highly dependent on changes in the inner diameter of the through hole 164. Therefore, in order to supply at a flow rate ratio such that the mixing ratio of air and fuel gas is equal to the stoichiometric mixing ratio or the fuel becomes lean, the height of the micro burner 170 and the inner diameter of the through hole 164 are set to By changing, the equivalence ratio capable of holding the micro flame was examined. This will be described below as a fourth test.

  The fourth test will be described with reference to FIG. In the fourth test, the burner outer diameter was fixed to 1.0 mm and the inner diameter was fixed to 0.7 mm. The inner diameter of the through hole 164 is set to three types of 1.2 mm, 1.3 mm, and 1.4 mm, and the burner height is set to 1 mm, 2.0 mm, 3.0 mm, 4.0 mm, 5.0 mm, 6 mm. The change was made to 0.0, 7.0 mm, and 8.0 mm, respectively. In FIG. 15, “♦” represents the data of the inner diameter of the through hole 164 = 1.2 mm, “■” represents the inner diameter of the through hole 164 = 1.3 mm, and “▲” represents the data of the inner diameter of the through hole 164 = 1.4 mm. Each is shown.

  Next, the results of the fourth test will be described. In order for the mixing ratio of air and fuel gas to be equal to the stoichiometric mixing ratio or to make the fuel lean, the equivalence ratio needs to be 1 or less. As shown in FIG. 15, in each of the combustors in which the inner diameter of the through hole 164 is 1.2 mm, the equivalence ratio exceeds 1. In the combustor with the inner diameter of the through hole 164 = 1.3 mm, the equivalent ratio was 1 only in the combustor with the burner height = 2 mm. In the combustor in which the inner diameter of the through hole 164 was 1.4 mm, the equivalence ratio was 1 or less regardless of the burner height. This is due to the ratio (hereinafter referred to as area ratio) of the inner diameter area of the micro burner and the area of the gap 169 between the outer peripheral surface of the micro burner and the inner edge of the through hole 164. This is because, in order to supply an air flow rate corresponding to the fuel flow rate so that the mixing ratio becomes a stoichiometric mixing ratio or fuel lean at a flow rate smaller than the air flow rate causing blowout, the gap area is smaller than the burner inner diameter area. Because it needs to be big enough. Thus, when the area ratio under each condition was calculated, the area ratio under the condition that the inner diameter of the through hole 164 = 1.2 mm was 0.90, and the area ratio under the condition where the inner diameter of the through hole 164 = 1.3 mm was 1.4. The area ratio under the condition of the inner diameter of the through hole 164 = 1.4 mm was 2.0.

  From the above results, the conditions under which the micro flame can be held under the condition that the mixing ratio of air and fuel gas is equal to the stoichiometric mixing ratio are as follows. It was found that the area ratio was at least 2.0 times.

  Next, a combustor unit 260 that is a second modification of the second embodiment will be described with reference to FIGS. 16 to 18. The combustor unit 260 shown in FIG. 16 is characterized in that the housing of the combustor 160 which is the first modification is bent inward and the two combustors are combined into a cylindrical shape.

  The structure of the combustor unit 260 will be described. As shown in FIG. 16, the combustor unit 260 includes a combustor 260 </ b> A and a combustor 260 </ b> B formed in a U-shaped cross section, and forms a cylindrical unit. The inner peripheral surface of the cylinder is a combustion surface by the micro burner 270. For example, when heating the cylindrical article to be heated P, the article to be heated P may be inserted into the combustor unit 260 from above.

  Next, the structure of the combustor 260A will be described. Since the combustors 260A and 260B have the same structure, only the structure of the combustor 260A will be described here. As shown in FIG. 17, the combustor 260 </ b> A has a structure similar to that of the combustor 160 (see FIG. 14) that is the first modification, and the casing 162 (see FIG. 14) of the combustor 160 is substantially U-shaped. A housing 262 that is bent in the direction is provided. As shown in FIG. 18, a partition wall 265 having a surface parallel to the combustion surface forming plate 263 that is an inner peripheral surface and disposed at a middle position in the height direction of the housing 262 is provided inside the housing 262. It has been. An oxidant gas chamber 266 is provided above the partition wall 265 (inside in the radial direction), and a fuel gas chamber 267 is provided below the partition wall 265 (outside in the radial direction).

  The combustion surface forming plate 263 is provided with a plurality of through holes 264 at predetermined positions. A plurality of micro burners 270 are inserted into the through holes 264 with their tips protruding inward in the radial direction of the housing 262, and the lower end side penetrates the partition wall 265 and communicates with the fuel gas chamber 267. Yes. That is, the micro burner 270 is supported by the partition wall 265. Further, a predetermined gap 269 is formed between the through hole 264 and the outer peripheral surface of the micro burner 270. The gap 269 communicates with the oxidant gas chamber 266.

  In the combustor 260 </ b> A having such a structure, the fuel gas that has flowed into the fuel gas chamber 267 flows from the lower end side of the micro burner 270 due to the fuel gas feed pressure from the fuel gas supply pipe. Then, fuel gas is ejected from the tip of the micro burner 270 and ignited to form a micro frame. On the other hand, the oxidant gas that has flowed into the oxidant gas chamber 266 flows out of the gap 269 between the micro burner 270 and the inner edge of the through hole 264 due to the pressure fed from the oxidant gas supply pipe, and forms at the tip of the micro burner 270. The oxidant gas is forcibly supplied so as to surround the periphery of the microframe. This can prevent oxygen shortage at the tip of the micro burner 270. Therefore, even if the micro burners 270 are densely packed, oxygen can be sufficiently supplied, so that adjacent micro frames do not merge. Therefore, since more micro burners 270 can be densely packed, the combustor 260A having a large heat generation density can be provided.

  And since combustor 260A is provided with the combustion surface curved inside, it is suitable for heating what has a curved surface like the to-be-heated material P shown in FIG. For example, when the object to be heated P is heated, on the planar combustion surface, the distance between the flame formed at the tip of the micro burner and the surface of the object to be heated P differs depending on the location. Thereby, since heating nonuniformity is made, the trouble of rotating the to-be-heated material P etc. was required. Therefore, since the combustor 260A has a combustion surface that curves inward, even if it has a curved surface such as the article to be heated P, it can be heated uniformly with little heating unevenness. And as shown in FIG. 16, a cylindrical combustion surface can be formed by combining such a combustor 260A and a similar combustor 260B to form a cylindrical unit. Therefore, when heating the pipe-shaped object P, the surface can be uniformly and uniformly heated without changing the position of the object P by being inserted inside the combustor unit 260.

  In addition, although the combustors 260A and 260B of the second modification include a combustion surface that curves inward, the shape is not limited to this as long as the shape surrounds the object to be heated. For example, a combustor 280 that is a third modification shown in FIG. 19 may include a cylindrical casing 282 having a polygonal shape in plan view. In this case, by adjusting the lengths of the micro burners, the distance to the surface of the article P to be heated can be made uniform, so that uneven heating can be reduced.

  Moreover, although the combustor unit 260 is made into a cylindrical shape by combining the two combustors 260A and 260B, the combustor itself may be formed in a cylindrical shape.

  Next, the combustor 200 which is 3rd Embodiment is demonstrated with reference to FIG. 20, FIG. FIG. 20 is a cross-sectional view of the combustor 200 (third embodiment), and FIG. 21 is a flowchart of the thermal power control process by the CPU of the controller 60. The third embodiment is a modification of the first embodiment and is characterized in that the heating power of the combustion unit 125 shown in FIG. 20 can be switched in three stages. Since the combustor 200 basically includes the structure of the combustor 1 of the first embodiment, the same members will be described with the same reference numerals, and different points will be mainly described.

  First, the structure of the combustor 200 will be described. As shown in FIG. 20, the combustor 200 includes a casing 2 similar to the combustor 1 (see FIG. 4) of the first embodiment. A partition wall 70 having a surface parallel to the support plate 3 and the bottom wall 9 and disposed at a middle position in the height direction of the housing 2 is provided inside the housing 2. A first fuel gas supply port 75 penetrating above the partition wall 70 is provided on the upper stage of the front wall 5 of the housing 2. The downstream end of the first fuel gas supply pipe 92 is connected to the first fuel gas supply port 75. On the other hand, a second fuel gas supply port 76 penetrating to the lower side of the partition wall 70 is provided at the lower stage of the front wall 5. The downstream end of the second fuel gas supply pipe 93 is connected to the second fuel gas supply port 76.

  A first fuel gas chamber 71 for temporarily storing the fuel gas supplied from the first fuel gas supply port 75 into the housing 2 is provided inside the housing 2 and above the partition wall 70. It has been. A second fuel gas chamber 72 for temporarily storing the fuel gas supplied from the second fuel gas supply port 76 into the housing 2 is provided below the partition wall 70.

  In addition, two types of micro burners 81 and 82 having different lengths are supported on the support plate 3 at an equal interval in a state of 9 × 9 in a plan view and projecting from the tip side upward. . The micro burner 81 penetrates the support plate 3 and the partition wall 70, and the lower end side extends to the second fuel gas chamber 72. On the other hand, the micro burner 82 is shorter than the micro burner 81, penetrates only the support plate 3, and extends at the lower end side to the first fuel gas chamber 71. Then, the heights of the tips of these 81 micro burners 81 and 82 are aligned, and a combustion portion 125 that is a flat heating surface is formed in the center of the support plate 3. The 81 micro burners constituting the combustion unit 125 are classified into a first burner group including 27 micro burners 81 and a second burner group including the remaining 54 micro burners 82.

  The first fuel gas supply pipe 92 is disposed upstream of the first pressure adjustment valve 111 and the first pressure adjustment valve 111 for adjusting the fuel gas flow rate in the pipe to a predetermined flow rate. A first electromagnetic valve 112 that opens and closes the flow path is provided. Further, the second fuel gas supply pipe 93 is also provided with a similar second pressure regulating valve 113 and a second electromagnetic valve 114 which is disposed upstream of the second pressure regulating valve 113 and opens and closes the flow path in the pipe. Are provided.

  Further, a controller 60 for controlling the operation of the combustor 200 is fixed to the outer surface of the back wall 8 of the housing 2. The controller 60 includes a CPU that is a central processing unit, a ROM that stores various programs, a readable / writable RAM that temporarily stores data being processed. The controller 60 is provided with an operation unit 62 for operating the combustor 200. The operation unit 62 is provided with a combustion switch (not shown) and a thermal power changeover switch (not shown) that can switch the heating power of the combustion unit 125 in three stages of “large”, “medium”, and “small”. . The combustion switch and the thermal power changeover switch are both electrically connected to the CPU of the controller 60.

  Further, the CPU of the controller 60 includes a first pressure adjustment valve 111 and a first electromagnetic valve 112 provided in the first fuel gas supply pipe 92 and a second pressure adjustment valve provided in the second fuel gas supply pipe 93. 113 and the second electromagnetic valve 114 are electrically connected to each other. Therefore, in the controller 60, the first pressure adjustment valve 111, the first electromagnetic valve 112, the second pressure adjustment valve 113, and the second electromagnetic valve 114 are each controlled based on the operation of the operation unit 62.

  Next, the thermal power control process of the combustor 200 by the CPU of the controller 60 will be described with reference to the flowchart of FIG. First, when the combustion switch is off, both the first solenoid valve 112 and the second solenoid valve 114 are closed. Then, it is determined whether or not the combustion switch is turned on by the user (S1). If it is not turned on (S1: NO), the process returns to S1 and the combustion switch is continuously monitored.

  Next, when the combustion switch is turned on (S1: YES), the first solenoid valve 112 and the second solenoid valve 114 are used to ignite all the micro burners 81 and 82 constituting the first burner group and the second burner group. Both are opened (S2). Then, the fuel gas flows through both the first fuel gas supply pipe 92 and the second fuel gas supply pipe 93. At this time, the first pressure adjustment valve 111 and the second pressure adjustment valve 113 are respectively controlled, and the fuel gas flow rates in the first fuel gas supply pipe 92 and the second fuel gas supply pipe 93 are adjusted. Thereby, the fuel gas ejection amount in the micro burners 81 and 82 is adjusted so as to be U (m / sec).

  Then, the fuel gas flows into the first fuel gas chamber 71 and the second fuel gas chamber 72 through the first fuel gas supply port 75 and the second fuel gas supply port 76 of the housing 2, respectively. The fuel gas stored in the first fuel gas chamber 71 flows inward from the lower end side of the micro burner 82 due to the fuel gas feed pressure from the first fuel gas supply pipe 92. On the other hand, the fuel gas stored in the second fuel gas chamber 72 flows inwardly from the lower end side of each micro burner 81 due to the fuel gas feed pressure from the second fuel gas supply pipe 93. Then, fuel gas is ejected from the tips of the micro burners 81 and 82. Here, all the micro burners 81 and 82 are ignited by an ignition device (not shown). As a result, a hemispherical microframe is formed at the tip of each microburner 81, 82, and a combustion section 125, which is a flat heating surface, is formed.

  Next, it is determined whether the heating power switch of the operation unit 62 is “large”, “medium”, or “small” (S3, S4). When the thermal power is “large” (S3: YES), both the first solenoid valve 112 and the second solenoid valve 114 are opened (S5). Thereby, since a micro flame is formed in both the first burner group and the second burner group, the maximum heating power is obtained in the combustion portion 125.

  When the thermal power changeover switch is “medium” (S3: NO, S4: YES), the first solenoid valve 112 is opened and the second solenoid valve 114 is closed (S6). Thereby, since fuel gas is not supplied to the 2nd fuel gas chamber 72, the micro burner 81 is extinguished and only the micro burner 82 continues combustion. At this time, of the 81 micro burners 81 and 82, only 54 micro burners 82 continue to burn, so that the heating power becomes “medium”.

  When the thermal power switch is “small” (S3: NO, S4: NO), the first solenoid valve 112 is closed and the second solenoid valve 114 is opened (S7). Thereby, since fuel gas is not supplied to the 1st fuel gas chamber 71, the micro burner 82 is extinguished and only the micro burner 81 continues combustion. At this time, of the 81 micro burners 81 and 82, only 27 of the micro burners 82 continue to burn, so the heating power becomes “small”.

  Next, it is determined whether or not the combustion switch is turned off (S8). When the combustion switch is turned off (S8: YES), both the first solenoid valve 112 and the second solenoid valve 114 are closed (S10). Thereby, since the fuel gas supplied to the first fuel gas chamber 71 and the second fuel gas chamber 72 is stopped, all the micro burners 81 and 82 are extinguished, and the processing ends.

  By the way, when the combustion switch has not been turned off (S8: NO), it is determined whether or not the heating power has been changed (S9). That is, it is determined whether or not the thermal power switch of the operation unit 62 has been switched by the user. While the thermal power switch is not switched (S9: NO), the process returns to S8, and the monitoring of the combustion switch and the monitoring of the thermal power switch are continued.

  Here, when there is a change in the thermal power (S9: YES), it is determined whether or not the thermal power before the change is “large” (S11). That is, when both the first solenoid valve 112 and the second solenoid valve 114 are in the open state, it is determined that the heating power is “high”. When the heating power before the change is “large” (S11: YES), all the micro burners 81 and 82 are burning. The switching of the thermal power is any one of “large” to “medium” or “large” to “small”. Therefore, when the heating power is switched to “medium” (S3: NO, S4: YES), only the second electromagnetic valve 114 is closed (S6), and the 27 micro burners 81 are extinguished. When the heating power is switched to “small” (S3: NO, S4: NO), only the first solenoid valve 112 is closed (S7), and the 54 micro burners 82 are extinguished. Thereafter, the turning-off of the combustion switch and the switching of the thermal power switch are similarly monitored (S8, S9).

  When the heating power before the change is “medium” or “small” (S11: NO), the micro burner 81 or 82 is extinguished. The switching of the heating power is any of “medium” to “large”, “medium” to “small”, “small” to “large”, or “small” to “medium”. That is, it is necessary to ignite a microburner that has been extinguished. Therefore, both the first electromagnetic valve 112 and the second electromagnetic valve 114 are once opened (S12). Then, the pressure adjustment valve of the gas supply pipe corresponding to the micro burner burned before the change is opened momentarily larger than the predetermined opening degree (S13).

  For example, when the micro burner 81 is extinguished and only the micro burner 82 is burning, the first pressure regulating valve 111 is opened momentarily larger than a predetermined opening degree. Then, since gas flows into the first fuel gas chamber 71 at once, the gas ejection amount at the tip of the micro burner 82 increases momentarily. At this time, the micro frame formed at the tip of the micro burner 82 is instantaneously deformed and burns to the left and right. That is, since it returns to a normal laminar flame, it is re-ignited at the tip of the micro burner 81 in the vicinity by a fire transfer phenomenon. As a result, all the micro burners 81 and 82 are returned to the ignited state. Thereafter, since the first pressure regulating valve 111 is immediately returned to the predetermined opening, the gas ejection amount at the tip of the micro burner 82 returns to the predetermined amount, and the micro frame is formed again.

  When the heating power is switched to “large” (S3: YES), both the first solenoid valve 112 and the second solenoid valve 114 are opened as they are (S5), and all the micro burners 81 and 82 are turned on. Maintained in an ignited state. When the heating power is switched to “medium” (S3: NO, S4: YES), only the second electromagnetic valve 114 is closed (S6), and the 27 micro burners 81 are extinguished. When the heating power is switched to “small” (S3: NO, S4: NO), only the first solenoid valve 112 is closed (S7), and the 54 micro burners 82 are extinguished. Thereafter, the combustion switch is turned off and the thermal power switch is switched (S8, S9). When the combustion switch is turned off (S8: YES), the first solenoid valve 112 and the second solenoid valve 114 are switched. Both are closed (S10). Thereby, since the fuel gas supplied to the first fuel gas chamber 71 and the second fuel gas chamber 72 is stopped, all the micro burners 81 and 82 are extinguished, and the processing ends.

  As described above, in the combustor 200 of the third embodiment, the inside of the housing 2 is partitioned into the first fuel gas chamber 71 and the second fuel gas chamber 72 by the partition wall 70. And the combustion part 125 provided in the support plate 3 is comprised by the several micro burner 81 which comprises a 1st burner group, and the micro burner 82 which comprises a 2nd burner group. The lower end portion of the micro burner 81 extends to the second fuel gas chamber 72, and the lower end portion of the micro burner 82 extends to the first fuel gas chamber 71. Fuel gas is supplied to the first fuel gas chamber 71 via the first fuel gas supply port 75. Fuel gas is supplied to the second fuel gas chamber 72 via the second fuel gas supply port 76. The first solenoid valve 112 is provided in the first fuel gas supply pipe 92 connected to the first fuel gas supply port 75, and the second fuel gas supply pipe 93 connected to the second fuel gas supply port 76 is provided with the first solenoid valve 112. Two electromagnetic valves 114 are provided.

  Further, the housing 2 is provided with a controller 60 for controlling the operation of the combustor 200 and an operation unit 62 for operating the combustor 200. The operation unit 62, the first electromagnetic valve 112, and the second electromagnetic valve 114 are connected to the CPU of the controller 60. With such a configuration, the controller 60 controls the opening and closing of the first solenoid valve 112 and the second solenoid valve 114 based on switching of the thermal power switch provided in the operation unit 62. Thereby, since the number of ignitions of the micro burners 81 and 82 can be controlled quantumally, the thermal power in the combustion part 125 can be quickly adjusted. Further, since the shape of the flame formed at each tip of the micro burners 81 and 82 is not changed by switching the heating power, the heating surface of the combustion unit 125 can be held.

  The present invention is not limited to the first, second, and third embodiments, and various improvements and modifications can be made without departing from the gist of the present invention. In the first embodiment, the micro burners 20 on the support plate 3 of the housing 2 are supported at equal intervals in a 10 × 10 array form in plan view. For example, as in the modification shown in FIG. The XY plane may be hypothesized on the support plate 220 of the housing 2 and the tips of the micro burners 20 may be arranged at the apexes of an equilateral triangle that continues in the XY direction.

  Further, in the combustion unit 125 of the combustor 200 of the third embodiment, the micro burners 81 and 82 are arranged in a 9 × 9 arrangement form in plan view. For example, a micro burner connected to the first fuel gas chamber is used. You may arrange | position densely and arrange | position the micro burner connected to the 2nd fuel gas chamber around it. In such a combustor, when a small pan is heated, the surface to be heated is small, so that the fuel gas may be sent only to the first fuel gas chamber. On the other hand, when a large pan is heated, the surface to be heated is large, and therefore the fuel gas may be sent to the first fuel gas chamber and the second fuel gas chamber. That is, the heat generation area of the combustion section can be freely adjusted according to the size of the heated surface.

  Further, in the combustor 200 of the third embodiment, the controller 60 controls the opening and closing of the first electromagnetic valve 112 and the second electromagnetic valve 114 based on switching of the combustion switch, but manually without using the controller. An operable on-off valve may be provided in each of the first fuel gas supply pipe 92 and the second fuel gas supply pipe 93.

  It is also possible to generate electric power using the combustor of the present invention. For example, the power generator 300 shown in FIG. 23 uses the combustor of the present invention. The power generation apparatus 300 includes a flat plate-like thermoelectric conversion element (Seebeck element) 130 that can convert heat into electricity. The thermoelectric conversion element 130 is an element that converts heat into electricity, and is a kind of thermoelectric element. This utilizes the “Seebeck effect” in which an electromotive force is generated when two different metals or semiconductors are joined and a temperature difference is produced between both ends. Therefore, a heat sink 140 for causing a temperature difference is fixed on the upper surface of the thermoelectric conversion element 130. The heat sink 140 includes a heat radiating plate 141 bonded to the upper surface of the thermoelectric conversion element 130, and a plurality of protrusions 142 that are erected on the upper surface of the heat radiating plate 141 and increase the heat radiating area. Yes. In addition, a support plate 150 having a rectangular shape in plan view, which is a heat insulating material sufficiently larger than the combustion portion 25, is bonded to the lower surface of the thermoelectric conversion element 130. A hole that is slightly smaller than the lower surface of the thermoelectric conversion element 130 is provided in the center of the support plate 150. Thereby, even if the lower surface of the thermoelectric conversion element 130 is heated, it is possible to prevent the upper surface and the heat radiating plate 141 from being heated by convection from the combustion unit 25.

  And the electric power generating apparatus 300 shown in FIG. 23 is provided with the structure (refer FIG. 1) of the combustor 1 of 1st Embodiment. At the center of the outer surface of the right side wall 6 of the housing 2, a bottomed cylindrical insertion portion 64 having an upper opening is provided. An insertion portion (not shown) having the same structure is also provided at the center of the outer surface of the left side wall (not shown) opposite to the right side wall 6. Then, the rear end portions of the pair of left and right support frames 65 and 66 refracted in an L shape are inserted into these insertion portions 64. At the front end portions of the support frames 65 and 66, gripping portions 67 and 68 having a U-shaped cross section for gripping one end portion of the thermoelectric conversion element 130 are provided. The shapes of the support frames 65 and 66 are objects of each other.

  When these support frames 65 and 66 are inserted into and supported by the left and right insertion portions 64 of the housing 2, the gripping portions 67 and 67 are positioned on the combustion portion 25 at a predetermined interval from the tip of each microburner 20. 68 oppose each other. Here, the both ends of the support plate 150 having the thermoelectric conversion element 130 on the upper surface are inserted into the inside of the grips 67 and 68, respectively. Thereby, the thermoelectric conversion element 130 can be arranged in parallel to the flat heating surface of the combustion unit 25 via the support plate 150. As described above, since the micro frame is formed at the tip of each micro burner 20, the thermoelectric conversion element 130 can be arranged close to the surface thereof. As a result, the heat generated from the flame surface of the micro flame is well transmitted to the thermoelectric conversion element 130, so that there is little heat loss.

  And since electricity can be taken out from the two output lines 131 connected to the thermoelectric conversion element 130, it can be used as a small power generator. The structure for supporting the thermoelectric conversion element 130 is not limited to this, and for example, a structure that directly supports the thermoelectric conversion element 130 may be used. Further, a thermoelectric conversion element 130 surrounded by a heat insulating material may be placed on a frame-shaped frame and attached to the housing 2.

  Moreover, although the electric power generating apparatus 300 is provided with the structure (refer FIG. 1) of the combustor 1 of 1st Embodiment, for example, the combustor 100 (refer FIG. 13), the combustor 160 (refer FIG. 14), a combustor 200 (see FIG. 20), combustor unit 260 (see FIG. 16), and combustor 280 (see FIG. 19) may be replaced. Although not shown, the combustors 100, 160, and 200 have the same configuration as that of the power generation device 300 shown in FIG. In the case of the combustor unit 260 and the combustor 280, a support frame that supports the thermoelectric conversion element to be disposed inside the cylinder may be provided in the casing.

  The combustor and the power generation device according to the present invention can be applied not only to a combustor for heating an object or a power generation device, but also to an ignition device, illumination, and the like.

DESCRIPTION OF SYMBOLS 1 Combustor 2 Case 3 Support plate 12 Fuel gas supply port 15 Fuel gas chamber 20 Micro burner 25 Combustion part 30 Case 33 Support plate 35 Bulkhead 40 Micro burner 41 Inner cylinder 42 Outer cylinder 45 Fuel gas flow path 46 Oxidant gas Flow path 51 Oxidant gas chamber 52 Fuel gas chamber 53 Partition wall 54 Oxidant gas supply port 55 Fuel gas supply port 60 Controller 62 Operation part 64 Insertion part 65, 66 Support frame 67, 68 Grasping part 70 Partition 71 First fuel gas chamber 72 Second fuel gas chamber 75 First fuel gas supply port 76 Second fuel gas supply port 81 Micro burner 82 Micro burner 92 First fuel gas supply tube 93 Second fuel gas supply tube 100 Combustor 111 First pressure regulating valve 112 First electromagnetic valve 113 Second pressure regulating valve 114 Second electromagnetic valve 130 Thermoelectric conversion element 200 Combustor 300 Power generator

Claims (14)

Fr is the dimensionless number Fr, Reynolds number is Re, fuel gas ejection speed is U (m / sec), pipe inner diameter is L (m), gravity acceleration is g (m / sec ² ), kinematic viscosity coefficient When ν (m ² / sec),
Fr = U (Lg) ^−1/2 > 1 and Re = ULν ⁻¹ <100
By satisfying the relationship, a plurality of tubular burners that form a microframe that is a hemispherical micro flame not containing a luminous flame at the tip,
Support means for supporting the plurality of burners;
A combustor comprising fuel gas supply means for supplying fuel gas to each of the plurality of burners. The support means is a housing,
The plurality of burners are housed on the inner side of the casing on the other end opposite to the tip side, and supported in a state where each tip protrudes outside from one surface of the casing,
The one surface is formed by assembling the tips of the plurality of burners,
The fuel gas supply means includes
A fuel gas supply port provided on a side wall of the housing;
2. The combustor according to claim 1, further comprising a fuel gas chamber that is provided inside the housing and temporarily stores the fuel gas supplied from the fuel gas supply port. The burner interval obtained by subtracting the outer diameter of the burner from the distance between the central axes of the burners adjacent to each other is 3.0 mm or more,
The combustor according to claim 2, wherein a length from the one surface of the casing of the burner to a tip of the burner is 3.0 mm or more. At least one partition wall that is provided in parallel with the one surface and forms a plurality of gas chambers by partitioning the fuel gas chamber is provided inside the casing,
The plurality of burners
A plurality of burner groups each corresponding to the plurality of fuel gas chambers;
In the burner group corresponding to the fuel gas chamber closest to the one surface, the other end of the burner extends to the corresponding fuel gas chamber,
In the burner group corresponding to the fuel gas chamber located on the side opposite to the one surface side of the partition wall, the other end of the burner extends through the partition wall to the corresponding fuel gas chamber. ,
The gas supply ports are respectively provided at positions corresponding to the plurality of fuel gas chambers,
A fuel gas supply pipe for supplying fuel gas from the outside is connected to each of the plurality of fuel gas supply ports,
The combustor according to claim 2 or 3, wherein the fuel gas supply pipe is provided with an on-off valve for opening and closing an inner flow path.   The combustor according to claim 4, wherein the number of the burners constituting the burner group is different for each burner group. The on-off valve is a solenoid valve,
Switching means for switching the heating power of the combustion section;
The combustor according to claim 4, further comprising a control unit that controls the plurality of electromagnetic valves based on switching of the thermal power by the switching unit.   The combustor according to any one of claims 1 to 6, wherein the fuel gas supply means supplies each of the plurality of burners with a mixed gas obtained by mixing oxygen or air with fuel gas. An oxidant gas supply means for supplying oxygen or air to the plurality of burners,
The burner has a double pipe structure having an inner cylinder and an outer cylinder,
A fuel gas flow path through which fuel gas supplied from the gas supply means flows is formed inside the inner cylinder,
The oxidant gas flow path through which oxygen or air supplied from the oxidant gas supply means flows is formed between the inner cylinder and the outer cylinder. Combustor. The support means is a housing,
The plurality of burners are housed on the inner side of the casing on the other end opposite to the tip side, and supported in a state where each tip protrudes outside from one surface of the casing,
The one surface is formed with a combustion portion formed by collecting the tips of the plurality of burners,
Inside the casing, a partition provided in parallel with the one surface is provided,
The fuel gas supply means includes
A fuel gas chamber provided on the inner side of the casing and on the opposite side of the one side of the partition;
A fuel gas supply port that is provided on a side wall of the housing and supplies fuel gas to the fuel gas chamber;
The oxidant gas supply means includes
An oxidant gas chamber provided inside the housing and provided on the one surface side of the partition;
It is provided on the side wall of the casing, and includes an oxidant gas supply port that supplies oxygen or air to the oxidant gas chamber.
The other end opposite to the tip of the outer cylinder extends to the oxidant gas chamber,
The combustor according to claim 8, wherein the other end portion opposite to the tip of the inner cylinder extends through the partition wall to the fuel gas chamber. An oxidant gas supply means for supplying oxygen or air to the plurality of burners,
The support means is a housing,
The plurality of burners are formed in a tubular shape, and the other end opposite to the tip side is accommodated inside the housing, and each tip is externally provided from a plurality of through holes provided on one surface of the housing. Each supported in a protruding state,
The one surface is formed with a combustion portion formed by collecting the tips of the plurality of burners,
A predetermined gap is provided between the inner edge of the through hole and the outer peripheral surface of the burner,
Inside the casing, a partition provided in parallel with the one surface is provided,
The fuel gas supply means includes
A fuel gas chamber provided on the inner side of the casing and on the opposite side of the one side of the partition;
A fuel gas supply port that is provided on a side wall of the housing and supplies fuel gas to the fuel gas chamber;
The oxidant gas supply means includes
An oxidant gas chamber provided inside the housing and provided on the one surface side of the partition;
It is provided on the side wall of the casing, and includes an oxidant gas supply port that supplies oxygen or air to the oxidant gas chamber.
The other end opposite to the tip of the burner extends through the partition wall to the oxidant gas chamber,
The combustor according to claim 1, wherein the burner is fixed to and supported by the partition wall.   The length from the one surface of the casing of the burner to the tip of the burner is 1.0 mm or more and 8.0 mm or less, and the ratio of the area of the gap to the inner diameter area of the burner is 2.0 times or more. The combustor according to claim 10, wherein there is a combustor.   The combustor according to claim 1, wherein the one surface of the housing is bent inward. The housing is formed in a cylindrical shape,
The combustor according to claim 12, wherein the one surface is an inner peripheral surface of the burner. A combustor according to any of claims 1 to 13,
A thermoelectric conversion element that converts heat generated from the microframe formed at each tip of the plurality of burners of the combustor into electricity;
An electric power generation apparatus comprising: an element support unit provided in the casing and supporting the thermoelectric conversion element in proximity to each tip of the plurality of burners.