KR102482769B1 - fuel reforming burner - Google Patents

Abstract

The present invention relates to a fuel reformer burner capable of facilitating ignition through an ignition rod, minimizing a pressure loss of combustion gas, and improving the mixture between air and the combustion gas. The fuel reformer burner includes: a burner body (100) receiving and supplying first and second gas and air, separately; an inner pipe (300) installed on an upper side of the burner body (100) to guide mixed gas of the first and second gas and the air discharged from the burner body (100) or the air to an upper part; an outer pipe (400) installed to surround the inner pipe (300) to guide the first and second gas delivered through a lower end to an upper part; a spark plug (500) installed in the burner body (100), and having an ignition rod (501) formed at an upper end to be exposed to the upper part of the inner pipe (300) to generate a spark; a nozzle (600) installed on an upper side in the outer pipe (400), and spraying the mixed gas upward; and a flow reflector (700) installed along an inner circumference surface of the outer pipe (400) while facing an upper outlet of the inner pipe (300) so as to uniformize sparks and reduce carbon monoxides and nitrogen oxides by guiding the mixed gas to the center of the nozzle.

Description

Fuel reforming burner {fuel reforming burner}

The present invention relates to a fuel reformer burner, and more particularly, to facilitate ignition and flame detection through an ignition rod, minimize pressure loss of combustion gas, and improve mixing between air and combustion gas. It relates to a fuel reformer burner.

In the existing burner, fuel gas (e.g. Anode-Off gas, AOG, anode-off gas) flows in through the second gas supply port, and air flows into the air inlet to form a flame. The flow rate of the mixer is relatively reduced and the mixing state is poor, resulting in the formation of a non-uniform and unstable flame. As a result, ignition and flame detection in the center hole and its vicinity are poor, resulting in a phenomenon in which normal operation of the burner is difficult. In addition, the flow rate of the mixer in that part is lowered, so the nozzle is heated and the risk of backfire may increase.

In addition, combustion noise may be generated due to an increase in the fluctuation of the flame zone.

In addition, a case in which the air supplied through the air inlet and the fuel gas supplied through the second gas supply port may not be sufficiently mixed may increase emission of carbon monoxide (CO) or nitrogen oxides (NOx). Carbon monoxide is produced by incomplete combustion, and nitrogen oxides (prompt NO) may also increase.

In addition, in the case of a conventional burner, the ignition rod performs both ignition and flame detection sensor functions at the same time, but the distance between the ignition rod and the flame is large, so the burner operation is not normally performed because the flame is not detected even though there is a flame, or the upper end of the ignition rod I have a problem with the ignition not working well.

In addition, when the mixed gas is sprayed through the nozzle, the pressure loss of the mixed gas is large, and the flame generated in the internal space cannot be visually observed from the outside of the burner, and the outer pipe portion adjacent to the flame generating part is heated to a very high temperature. However, it also has a problem that the flame can be dispersed without being concentrated in the center.

On the other hand, the above-mentioned background art is technical information that the inventor possessed for derivation of the present invention or acquired in the process of derivation of the present invention, and cannot necessarily be said to be known art disclosed to the general public prior to filing the present invention. .

Korean Patent Publication No. 10-2012-0067814 (published on June 26, 2012) Korean Patent Registration No. 10-2273606 (2021.07.06. Notice)

One aspect of the present invention is to install a flow reflector in the direction of the air flowing into the inner tube to improve mixing primarily and induce concentrated flow to the central hole and its vicinity without dispersing some of the mixture. An implemented fuel reformer burner is provided.

In addition, ignition is smoothly performed near the ignition rod in the injection hole, and at the same time, the ignition rod detects whether or not there is a flame, and if there is a flame, it is not detected as no flame. Provides to prevent burner malfunction do.

In addition, it is provided to prevent a pressure loss of the gas by minimizing a decrease in the flow rate of the fuel gas passing through the nozzle.

In addition, the installation of the flow reflector provides cooling of the vicinity of the flame-generating nozzle and the adjacent external tube body.

In addition, there is provided a fuel reformer burner implemented so that a user can observe a flame with the naked eye by providing a viewing window through which an internal space of the burner can be viewed with the naked eye at a lower end of the burner.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A fuel reformer burner according to an embodiment of the present invention includes a burner body receiving and supplying a first gas and air; an inner tube installed on the upper side of the burner body to guide the mixed gas or air composed of the first gas and air discharged from the burner body to the upper side; an outer tube that is installed to surround the inner tube and guides the second gas delivered through the lower end to the upper part; A spark plug installed on the burner body and having an ignition rod exposed to the upper portion of the inner tube body to generate a spark formed at an upper end; a nozzle installed on the inside of the outer tube and spraying a mixed gas formed by mixing air, a mixed gas, and a second gas upward; And it is installed along the inner circumferential surface of the outer tube body while facing the upper outlet of the inner tube body to induce mixing of air, mixed gas and second gas to make the flame uniform and reduce the generation of carbon monoxide and nitrogen oxides. Air, It includes; a flow reflector for inducing swirling of the mixed gas and the second gas.

In one embodiment, the flow reflector may have a plurality of flow holes perforated so that air, the mixed gas and the second gas may pass through and flow.

In one embodiment, the flow reflector may be installed to maintain a gap with the inner surface of the outer tube body so that the second gas can flow therethrough.

In one embodiment, the flow reflector, preferably may be configured to include a swirler, the width (L) is 1 of the difference between the inner diameter (D ₁ ) and the outer diameter (D ₂ ) of the inner tube body of the outer tube It is formed greater than or equal to / 10, and the angle (θ ₁ ) is greater than or equal to 10 degrees and less than or equal to 60 degrees, and the distance (h) from the inner tube body is the inner diameter (D ₁ ) of the outer tube body and The outer diameter (D ₂ ) of the inner tube may be configured equal to or smaller than 1/2 of the difference.

In one embodiment, the flow reflector may be installed above the nozzle.

In one embodiment, the nozzle may have a central hole through which the ignition rod passes in the center of an upper surface thereof, and an edge of the injection hole and a injection hole through which the mixed gas passes.

In one embodiment, the outer diameter of the nozzle may be formed of a vertical groove formed in a vertical direction or a spiral groove formed in an inclined direction.

In one embodiment, the injection hole may be formed such that a diameter gradually decreases from a lower side to an upper side so that a diameter of an upper discharge port is smaller than a lower inlet port so as to reduce a pressure loss of the mixed gas passing therethrough.

In one embodiment, the spray hole may be spaced apart at regular intervals along the rim of the inner spray hole of the nozzle where the center hole is formed, and a plurality of them may be formed through.

In one embodiment, the ignition rod may be formed in the form of a circular flat plate in which protrusions are protruded at regular intervals along the rim of the injection hole so that the upper end of which the spark is generated is close to the flame to cause the spark.

In one embodiment, the fuel reformer burner according to another embodiment of the present invention may further include a viewing window formed at a lower end of the burner body so that the flame can be observed with the naked eye.

In one embodiment, the fuel reformer burner according to another embodiment of the present invention may further include an IR detection sensor or a UV detection sensor to detect infrared rays or ultraviolet rays irradiated from the flame.

According to one aspect of the present invention described above, ignition and flame detection at the upper end of the ignition rod can be easily performed by making the distance between the ignition rod and the flame generated in the nozzle close.

In addition, it is possible to prevent malfunction of the burner by ensuring that ignition is smoothly performed near the ignition rod in the injection hole, and at the same time detecting the presence or absence of a flame with the ignition rod and not detecting that there is no flame when there is a flame.

In addition, it is possible to prevent a pressure loss of the gas by minimizing a decrease in the flow rate of the fuel gas passing through the nozzle.

In addition, the installation of the flow reflector can cool the outer tube adjacent to the nozzle, which is the flame generating part, so that it is not hot.

In addition, it is possible to form a gap between the flow reflector and the outer tube to cool the outer tube so that it is not hot.

In addition, the flame can be made uniform by configuring a gap between the flow reflector and the outer tube.

In addition, it is possible to prevent the dispersion of the flame in the nozzle and to concentrate it in the center.

In addition, a viewing window through which an inner space of the burner can be viewed with the naked eye is provided at a lower end of the burner, so that the user can observe the flame with the naked eye.

Effects of the present invention are not limited to the effects mentioned above, and various effects may be included within a range apparent to those skilled in the art from the contents to be described below.

1 is a diagram showing a schematic configuration of a fuel reformer burner according to an embodiment of the present invention.
2 and 3 are cross-sectional views of a fuel reformer burner according to an embodiment of the present invention of FIG. 1 .
FIG. 4 is a view showing an installation structure of the flow reflector of FIG. 2 .
Figure 5 is a view showing the installation structure of the nozzle of Figure 1;
6 is a view showing the nozzle of FIG. 1;
Figure 7 is a view showing a cross-sectional view of the nozzle of Figure 1;
8 is a view showing an embodiment of the ignition rod of FIG. 1;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention which follows refers to the accompanying drawings which illustrate, by way of illustration, specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable one skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different from each other but are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in another embodiment without departing from the spirit and scope of the invention in connection with one embodiment. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description set forth below is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all equivalents as claimed by those claims. Like reference numbers in the drawings indicate the same or similar function throughout the various aspects.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a diagram showing a schematic configuration of a fuel reformer burner according to an embodiment of the present invention.

1 and 2, the fuel reformer burner 10 according to an embodiment of the present invention includes a burner body 100, an inner tube body 300, an outer tube body 400, a spark plug 500, a nozzle ( 600) and a flow reflector 700.

The burner body 100 receives the first gas and air, respectively, and supplies a mixed gas or air in which the first gas and air are mixed upward through the inner tube 300 .

In one embodiment, the burner body 100 may have an air supply port 101 for receiving air and a first gas supply port 102 for receiving the first gas.

Here, the first gas is a gas used to heat the reformer in the initial stage, and may be configured to be LNG or LPG gas.

The inner tube 300 is installed on the upper side of the burner body 100 to communicate with the burner body 100 and guides the mixed gas or air discharged from the burner body 100 upward.

In one embodiment, the inner tube body 300 guides the mixed gas or air upward while partitioning the inner space of the outer tube body 400.

In one embodiment, the inner tube body 300 is formed relatively shorter than the length of the outer tube body 400, and the mixed gas moved upward through the outer tube body 400 is ignited. Supplying a predetermined amount of air will do

In one embodiment, the inner tube body 300 receives air distributed from the burner body 100 and guides the air upward to add to the mixed gas, so that the mixed gas has a concentration equal to or higher than the ignition point.

The outer tube body 400 is installed to surround the inner tube body 300, and guides the second gas supplied through the lower end to the upper part. Here, a flame is initially generated with the first gas so that the reformer reaches a certain temperature (eg, a temperature of 900 degrees or more), and after the reformer reaches a certain temperature, the returned anode off gas (eg: hydrogen) gas, etc.), and when the fuel amount of the second gas is insufficient, it may be configured to be supplemented with the first gas.

In one embodiment, the outer tube body 400, the second gas supply port 401 for receiving the second gas may be formed on one side of the lower end.

Here, the second gas is an anode off gas, and this gas is a gas that comes out after a chemical reaction (eg, hydrogen gas remaining after use in a fuel cell stack), and is mixed with air to form a mixed gas. , this mixed gas burns in a flame.

The spark plug 500 is installed on the burner body 100, and an ignition rod 501 that is exposed to the upper portion of the inner tube body 300 and causes a spark is formed at the top. Here, the ignition rod 501 may be configured not only to ignite but also to sense a flame at the same time.

In one embodiment, the ignition rod 501, as shown in FIG. 8, has protruding circular protrusions of various shapes at regular intervals along its rim so that the upper end of the flame is generated in close proximity to the mixer to generate a flame. It may be formed in the form of a flat plate (501a, 501b).

In one embodiment, the spark plug 500 receives an external high voltage and generates a spark in the ignition rod 501, so that the mixed gas injected from the nozzle 600 is caused by the spark generated in the ignition rod 501. It ignites and creates a flame.

In one embodiment, in the spark plug 500, an insulating support material 502 for insulating the ignition rod 501 and the nozzle 600 is installed on the top of the ignition rod 501.

In one embodiment, the insulating support material 502 is preferably installed at a position relatively lower than the end of the ignition rod 501 generating a spark.

In one embodiment, the insulating support material 502 is preferably inserted and coupled to the center of the nozzle 600, and may be formed of various materials capable of blocking interference with the nozzle 600, such as insulator, rubber, or silicon.

The nozzle 600 is installed on the inside upper side of the outer tube body 400 and injects a mixed gas formed by mixing air and the first and second gases upward. In addition, the outer diameter of the nozzle 600 may be configured to have a function of forming a spiral groove or a vertical groove to promote the composition of the mixer and cooling the outer tube body 400.

In one embodiment, the nozzle 600, it is preferable that the outer surface is closely supported on the inner circumferential surface of the outer tube body 400, and injects the mixed gas upward in that state.

In one embodiment, the nozzle 600 is installed at a position relatively lower than the end of the ignition rod 501 generating a spark.

The flow reflector 700 guides the mixed gas of air and the first and second gases to the center to uniformly burn the flame to reduce the generation of carbon monoxide and nitrogen oxides (especially prompt NO). It is installed along the inner circumferential surface of the outer tube body 400 while facing the upper outlet of the tube body 300 to induce swirling of the mixed gas.

In one embodiment, the flow reflector 700, as shown in FIG. 3 or 5, a plurality of flow holes 701 may be perforated so that the mixed gas can pass through and flow. The main (main) mixer is configured to flow in the central part of the flow reflector 700, and the mixture is intensively flowed in the central part of the nozzle 600 to facilitate ignition as well as the outer tube body 400 It has a cooling function. On the other hand, the amount of flow in the flow hole 701 may be configured to flow with a smaller amount of flow than the central portion of the flow reflector 700 .

In one embodiment, the flow reflector 700 may be configured to maintain a gap between the inner surface of the outer tube body 400.

In one embodiment, the flow reflector 700, as shown in Figure 4, 1) may be configured to include a swirler, 2) the width (L) is preferably the inner diameter (D ₁ ) of the outer tube body 400 ) and the outer diameter (D ₂ ) of the inner tube body 300 is configured to be greater than or equal to 1/10 (= 1/2 × 1/5) of the difference, 3) the angle (θ ₁ ) is preferably greater than 10 degrees It is configured to be greater than or equal to, less than or equal to 60 degrees, and 4) the distance (h) from the inner tube body 300 is the difference between the inner diameter (D ₁ ) of the outer tube body 400 and the outer diameter (D ₂ ) of the inner tube body. It is desirable to make a configuration equal to or smaller than 1/2.

In one embodiment, the flow reflector 700 may be installed on the upper and lower sides of the nozzle 600, and the installation is the same as the installation on the lower side of the nozzle 600 when installed on the upper side of the nozzle 600. omit explanation.

In the fuel reformer burner 10 according to an embodiment of the present invention having the configuration described above, the ignition rod 501 is ignited at the upper ends 501a and 501b by closing the distance between the ignition rod 501 and the flame. can be made easily.

In addition, it is possible to prevent a pressure loss of the gas by minimizing a decrease in the flow rate of the gas passing through the nozzle 600, and to prevent the dispersion of the flame and to concentrate it in the center of the outer tube body 400.

The fuel reformer burner 10 according to an embodiment of the present invention having the configuration described above may further include a viewing window 800 .

The viewing window 800 is formed at the lower end of the burner body 100 so that the flame can be visually observed.

The fuel reformer burner 10 according to an embodiment of the present invention having the configuration described above includes an IR detection sensor (not shown in the drawing for convenience of explanation) or a UV detection sensor (not shown in the drawing for convenience of explanation) may further include.

An IR detection sensor or a UV detection sensor detects infrared rays or ultraviolet rays irradiated from a flame, and provides information on whether or not a flame is generated or the temperature of the flame to the user.

Accordingly, the fuel reformer burner 10 according to an embodiment of the present invention having the configuration described above has a viewing window at the lower end of the burner through which the internal space of the burner can be viewed with the naked eye, so that the user can see the flame. can be observed with

In general, the burner constantly senses whether the flame exists normally, and shuts off the fuel valve when the flame is not stable or is extinguished (turned off). Also, a constant mixture must be supplied in the vicinity of igniting the air-fuel mixture. To this end, it is necessary to ignite the air-fuel mixture and constantly form a flame in the vicinity of detecting the flame formed at this time, and for this purpose, a plurality of fuel nozzles may be configured.

Accordingly, the nozzle 600 should be designed to have little variation in the operating environment of various burners, and should be configured to prevent backfire even when a fuel having a high flame propagation speed such as hydrogen is used.

To achieve this, an insulator 502 supporting the ignition rod 502 is formed to simultaneously enable ignition and flame detection, and a plurality of injection holes 602a are formed around the insulator 502 . More preferably, a fireball having a part of a circle, a triangle, or a quadrangular cross section in the circumferential direction with the insulator 502 as the center is constituted. At this time, the longest length of the spray hole such as a semicircle, a triangle, a square, etc. may be configured to be greater than or equal to 0.3 mm.

5 and 6, the nozzle 600 has a central hole 601 through which the ignition rod 501 passes in the center of the upper surface, and the injection hole rim formed on the outer diameter of the central hole 601 ( 602c) and a spray hole 602a through which the mixed gas passes, and the outer diameter of the nozzle 600 may be configured to form a spiral groove 602b or a vertical groove 602b.

In one embodiment, the spray hole 602a or the spray hole rim 602c is formed vertically so as to be formed in a vertical direction, and is preferably formed in multiple pieces so that the mixed gas is evenly sprayed upward.

In one embodiment, the spray hole 602a or the spray hole rim 602c may be formed in a part of a circle, a semicircle, a triangle, or a rectangle.

In general, since the flow cross-sectional area of the inlet portion of the mixer of the nozzle 600 is suddenly reduced, kinetic energy is lost due to pressure loss. In order to minimize this, the cross-sectional area of the nozzle 600 is sequentially reduced, and a certain angle is formed inside the nozzle whose cross-section is reduced.

Accordingly, as shown in FIG. 7 , the diameter of the injection hole 602a gradually decreases from the bottom to the top so that the diameter of the upper outlet is smaller than that of the lower inlet so as to reduce the pressure loss of the passing mixed gas. can be formed so that

In one embodiment, a plurality of injection hole edges 602c may be spaced apart at regular intervals along the inner injection hole edge of the nozzle 600 where the central hole 601 is formed, and may be formed in plurality.

The above-described embodiments are for illustrative purposes, and those skilled in the art to which the above-described embodiments belong can easily transform into other specific forms without changing the technical spirit or essential features of the above-described embodiments. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected through this specification is indicated by the following claims rather than the detailed description above, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof. .

10: fuel reformer burner
100: burner body
300: inner tube
400: outer tube
500: spark plug
600: nozzle
700: floating reflector
800: viewing window

Claims (10)

A burner body 100 receiving and supplying first gas and air, respectively;
An inner pipe body 300 installed on the upper side of the burner body 100 to guide the mixed gas composed of the first gas and air discharged from the burner body 100 upward;
an outer tube body 400 installed to surround the inner tube body 300 and guiding the second gas transmitted through the lower end to the upper part;
A spark plug 500 installed on the burner body 100 and having an ignition rod 501 formed at an upper end exposed to the upper portion of the inner tube body 300 to generate a spark;
The ignition rod 501 is formed in the form of a circular flat plate in which projections protrude at regular intervals along the edge of the injection hole 602c so that the upper end of the spark generation is close to the flame to generate a spark,
a nozzle 600 installed on the inside of the outer tube 400 and injecting the mixed gas upward; and
A flow reflector 700 installed along the inner circumferential surface of the outer tube body 400 while facing the upper outlet of the inner tube body 300 so that the mixed gas can be guided and concentrated toward the center of the nozzle 600. , a fuel reformer burner.
According to claim 1,
The flow reflector 700,
A fuel reformer burner in which a plurality of flow holes 701 are perforated so that the mixed gas can pass through and flow.
According to claim 1,
The flow reflector 700,
A fuel reformer burner forming a gap with the outer tube body 400.
According to claim 1,
The flow reflector 700,
A fuel reformer burner installed above the nozzle 600.
According to claim 1,
The nozzle 600,
A center hole 601 through which the ignition rod 501 passes is formed in the center of the upper surface, and a spray hole rim 602c in contact with the center hole 601 and a spray hole 602a through which the mixed gas passes are formed. ,
On the outer diameter of the nozzle 600,
A fuel reformer burner comprising a vertical groove formed in a vertical direction or a spiral groove formed in an inclined direction.
According to claim 5,
The injection hole 602a,
A fuel reformer burner whose diameter gradually decreases from the bottom to the top so that the diameter of the upper outlet is smaller than that of the lower inlet to reduce the pressure loss of the passing mixed gas.
According to claim 5,
The injection hole 602a,
The fuel reformer burner, wherein a plurality of the fuel reformer burners are spaced apart at regular intervals along the inner injection hole edge 602c of the nozzle 600 where the central hole 601 is formed.
delete According to claim 1,
The fuel reformer burner further comprising a viewing window 800 formed at a lower end of the burner body 100 so that the flame can be observed with the naked eye.
According to claim 9,
A fuel reformer burner further comprising; an IR detection sensor or a UV detection sensor to detect infrared rays or ultraviolet rays irradiated from the flame.

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