JP2020008244A - Hydrogen combustion equipment - Google Patents

Abstract

To enable combustion of large hydrogen flame with a desired color over a long period without any trouble.SOLUTION: A hydrogen combustion device 11 comprises a burner 15 that burns hydrogen to emit a hydrogen flame F, and a coloring unit 17 that colors the hydrogen flame F. The coloring unit 17 comprises a spray nozzle 71 that is provided at a position adjacent to the burner 15 and sprays a coloring liquid exhibiting a flame reaction. Around the radial direction of the spray nozzle 71, entrainment suppressing means 74 composed of a flange part 74a positioned in an air entrainment flow passage generated when the spray nozzle 71 sprays the coloring liquid is provided, thereby shutting off the air entrainment flow passage.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a hydrogen combustion device that burns a transparent hydrogen flame so that it can be visually recognized.

  The hydrogen flame has little visible light and is almost transparent, so it is difficult to catch it visually. For this reason, it is difficult to visually confirm and detect the combustion state of the hydrogen flame, and it has been proposed to color the hydrogen flame.

  As described in Patent Document 1 below, coloring of a hydrogen flame is performed by holding a salt exhibiting a flame reaction at the tip of a burner nozzle. In this configuration, when a hydrogen flame is generated from the burner, the hydrogen flame contacts the salt at the tip of the nozzle, and the flame emits visible light due to the flame reaction of the salt.

  However, since the salt exhibiting a flame reaction is held at the tip of the cylindrical nozzle, only the outer flame portion of the flame appears to be colored. Further, as described in Patent Literature 1, when the amount of the applied salt is increased due to diffusion combustion, the luminance level of the flame can be increased, but the luminance level of the flame sharply decreases. In Patent Document 1, this difficulty is solved by forming a groove at the tip of the nozzle and drawing the rising portion of the flame into the nozzle, but it is still difficult to maintain color development for a long time. . For this reason, it was not possible to show a large hydrogen flame for the purpose of production at the event.

  Therefore, as in Patent Document 2 below, a hydrogen flame coloring apparatus in which a color-forming member made of a porous body carrying a color-forming material exhibiting a flame-color reaction is placed in front of a direction in which a hydrogen flame is emitted has been proposed. This device can burn a large hydrogen flame emitting a desired color for a long time, and is suitable for use in events and the like.

  However, after obtaining the coloring member, a management operation of transporting the charging member, charging the device, or replacing the device is required, and there are cases where it is difficult to use the member.

JP-B-59-33805 Japanese Patent No. 6225219

  Accordingly, it is a main object of the present invention to enable a large hydrogen flame emitting a desired color to be burned for a long time without any trouble.

  Means for that are a burner that burns hydrogen and emits a hydrogen flame, and a hydrogen combustion device provided with a coloring portion that colors the hydrogen flame, wherein the coloring portion is provided at a position adjacent to the burner. Hydrogen combustion, comprising: a spray nozzle for spraying a colored liquid exhibiting a flame reaction; and a radially-encircling periphery of the spray nozzle, comprising entrainment suppression means positioned in an air entrainment channel generated when the spray nozzle sprays. Device.

  In this configuration, the coloring liquid sprayed from the spray nozzle of the coloring section becomes mist while entraining the surrounding air and scatters at an appropriate spray angle. At this time, the entrainment suppressing means is located in the air entrainment flow path generated at the time of spraying, and cuts off or slows down the flow of the entrained air or reduces the amount of air to suppress the entrainment of air. Thereby, the narrowing of the spray angle is suppressed, or the spray angle is widened to perform wide-angle spraying. The sprayed coloring liquid is brought into contact with and heated by the hydrogen flame emitted from the burner, and exhibits a flame color reaction to color the hydrogen flame.

  As described above, according to the present invention, a wide-angle spray of the coloring liquid can be performed, so that the contact between the coloring liquid and the hydrogen flame can be exerted over a wide range. Therefore, it is possible to obtain a large hydrogen flame which emits a desired color. In addition, since the coloring of the hydrogen flame is performed by spraying the coloring liquid, the colored combustion state can be continued for a long time. In addition, unlike the case of using a coloring member made of a porous material, the coloring material can be used anywhere as long as the coloring liquid can be supplied, and handling is easy.

FIG. 2 is a partially broken front view of the hydrogen combustion device. FIG. 2 is a perspective view of a hydrogen combustion device. Explanatory drawing which shows an operation state. The perspective view of a burner. Explanatory drawing which shows an operation state. Explanatory drawing which shows a test method. The top view and sectional drawing of the entanglement suppression means used in a test. FIG. 9 is a plan view of a entanglement suppressing unit according to another example.

  One embodiment for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 shows a partially cutaway front view of the hydrogen combustion device 11 in a combustion state. The hydrogen combustion device 11 is suitably used as a device for lighting a flame Fa such as a torch, a bonfire or a bonfire used in various events, ceremonies, store operations, shrines and temples, gardens, and the like.

  The hydrogen combustion device 11 is provided inside the exterior body 12. The exterior body 12 is formed in an appropriate shape, and has a shape in which an upper surface is opened. As shown in FIG. 2, the hydrogen combustion device 11 is provided inside a wall 13 formed in the exterior body 12 and having a circular shape in a plan view, and burns hydrogen to generate a hydrogen flame F (see FIG. 3). ) And a coloring section 17 for coloring the hydrogen flame F.

  The burner 15 is cylindrical and has a circular flame 51 in a plan view facing upward. A plurality of such burners 15 are provided, and these burners 15 are arranged so as to form a circular surface in plan view as a whole at intervals. Specifically, it has a circumferential part 15A for drawing a circle and an inner part 15B for drawing a cross located inside the circumferential part 15A. The size of the circular surface formed by the plurality of burners 15 is a size that fits in the partition 13 at the upper part of the housing space 12a of the exterior body 12. A burner 15 having a flame port 51 with an appropriate diameter is used, and the number and arrangement intervals of the burners 15 are appropriately set so as to obtain a hydrogen flame F of a desired size as a whole.

  All burners 15 are supplied with hydrogen from a gas supply pipe 52. Hydrogen is supplied in a state of 100 vol% of hydrogen until it leaves the burner 15, and diffuses and burns in the burner 15.

  Further, the burner 15 may be provided with baffle plates 53 at intervals in the direction of injection of the flame port 51 at the upper end as shown in FIG. The baffle plate 53 is different from the case without the baffle plate 53 in the direction and mode in which the hydrogen flame F is emitted.

  The baffle plate 53a shown in FIG. 4A mainly changes the direction in which the hydrogen flame F emerges as shown in FIG. 5, and faces the flame outlet 51 of the burner 15 in an oblique posture. And is held on the burner 15 by a support fitting 54. The angle and size of the baffle plate 53a are appropriately set.

  The baffle plate 53b shown in FIG. 4 (b) mainly changes the way the hydrogen flame F emerges, and is a plate shape that directly faces the flame port 51 of the burner 15, and has a support fitting 54. At the burner 15. The size and shape of the baffle plate 53b are appropriately set. The baffle plate 53b shown in FIG. 4B has a disk shape and is formed in a size to close the flame port 51 in plan view. As indicated by the arrow, the hydrogen flame F rises upward from the entire circumference except for the portion having the support fitting 54.

  The coloring unit 17 includes a spray nozzle 71 that sprays a coloring liquid exhibiting a flame reaction, and is provided in a plurality of positions adjacent to the burner 15. The spray nozzle 71 has a plurality of spray ports 71a arranged in an annular shape, and is provided with the spray ports 71a facing upward.

  The arrangement positions of the coloring portions 17 are positions surrounded by the burners 15, and in this example, the coloring portions 17 are arranged at four positions between the circumferential portion 15A and the inner portion 15B formed by the plurality of burners 15. . As shown in the schematic structure of FIG. 3, a tank 72 for storing a coloring liquid is connected to the spray nozzle 71 via a liquid supply path 73. From the spray nozzle 71, an appropriate compressed air pressure is applied. It is configured such that spraying is performed at a liquid pressure of.

  The liquid supply path 73 is provided with at least one tank 72. In the case where a plurality of tanks 72 are provided, the tanks 72 may store colored liquids exhibiting different flame reactions. In this case, the liquid supply path 73 is provided with an appropriate switching means (not shown) including an electromagnetic valve or the like for switching the coloring liquid to be supplied.

  As an example of a coloring liquid, sodium carbonate is used for coloring yellow, cesium carbonate is used for coloring blue-violet, lithium carbonate is used for coloring red, and potassium carbonate is used for coloring red-violet. An aqueous solution of ammonium borate is used for coloring green, and an aqueous solution of calcium acetate is used for coloring orange. As described above, since mainly the carbonate is used for the coloring liquid and the conventional chloride is not used, harmful chlorine-based gas and fine particulate matter generated by combustion can be suppressed.

  Around the spray nozzle 71 in the radial direction, there is provided an entrainment suppressing unit 74 located in an air entrainment flow path generated when the spray nozzle 71 sprays. The air entrainment flow path is formed mainly on the outer peripheral surface of the spray nozzle 71 as indicated by an arrow in FIG. 3, and the air in the air entrainment flow path flows toward the spray port 71 a at the tip of the spray nozzle 71.

  The entanglement suppressing means 74 is constituted by at least one of a flange-like portion 74a protruding in the outer peripheral direction and a wall-like portion surrounding the outer periphery. The entrapment suppressing means 74 shown in FIGS. 1, 2 and 3 is a flange 74a. The flange portion 74a is a plate having an appropriate size and shape as appropriate, and in the air entrainment flow path, shuts off air moving in the direction of the spray port 71a along the outer circumferential surface of the spray nozzle 71 and flows in from the outer circumferential direction. Reduce entrained air.

  The flange portion 74a in the illustrated example has a disk shape, and is provided at a position on the tip side of the spray nozzle 71 on the side opposite to the spray direction from the spray port 71a and close to the spray port 71a.

The entrainment suppressing means 74 suppresses the narrowing of the spray angle of the coloring liquid sprayed from the spray nozzle 71, or widens the spray angle to perform wide-angle spraying (suppression of such narrowing of the spray angle). The spread of the spray angle is hereinafter referred to as “widening the spray angle”). As a result, the spray range (spray diameter or spray width) by the spray nozzle 71 is increased.
In order to verify this, the following multiple tests were performed.

  Water was sprayed with the spray nozzle 71 facing upward as shown in FIG. 6, and the spray angle θ ° was examined under various conditions.

  The spray nozzle 71 used was a pressurized two-fluid type. Specifically, an empty cone nozzle BIMK6004 manufactured by Ikeuchi Co., Ltd. was used, and the liquid (water) pressure was set to 0.1 MPa (atmospheric pressure standard; the same applies hereinafter).

Water is sprayed using the spray nozzle 71, and as shown in FIG. 6, a spray diameter Lmm at a position 100 mm away from the spray port 71a is measured, and a spray angle θ ° is calculated based on this. The arithmetic expression is as follows.
θ = 2 · arctan (b / a)
Here, a is the distance <100> from the spray port 71a to the position where the spray diameter Lmm is measured, and b is half <L / 2> of the spray diameter Lmm.

Next, the test contents are shown.
<Test 1> The compressed air pressure MPa (0.2, 0.3, 0.4) of the spray nozzle 71 and the entanglement suppressing means 74, here, a circular flange 74a (in plan view) shown in FIG. (Diameter φ100mm).
<Test 2> Entrapment suppression means 74, here, the presence or absence of a flange 74a shown in FIG. .

However, as shown in FIG. 6, the entire portion having the spray port 71a is exposed and a few mm below the spray port 71a is set to “high”, and a position 4 mm lower than the “high” position is set to “middle”, A position 8 mm lower than the "middle" position is defined as "low". The high position, the middle position, and the low position are positions on the upper surface of the flange 74a.
<Test 3> Entrapment suppressing means 74, in this case, the presence or absence of the flange 74a and the diameter φmm of the flange 74a (20, 30, 40, 50, 60, 70, 90, 100, 120).
<Test 4> Entanglement suppressing means 74, specifically, a flange-shaped portion 74 a shown in FIG. 7B and an outer peripheral edge of a surface of the spray nozzle 71 on the spray direction side of the flange-shaped portion 74 a (diameter φ100 mm). , The height hmm (15, 20, 30) of the wall-shaped portion 74b and the presence or absence of the wall-shaped portion 74b.

  However, as shown in FIG. 7B, the height hmm of the wall portion 74b is a height from the upper surface of the flange portion 74a.

  The results of each test are as follows.

<Test 1>
The compressed air pressure was 0.2 MPa, 0.3 MPa, and 0.4 MPa. The height of the entanglement suppressing means 74 (diameter φ100) composed of the flange 74a from the spray port 71a was set to the “high” position.

  As a result, as shown in Table 1, without the entrainment suppressing means 74 composed of the flange portion 74a, when the compressed air pressure is 0.2 MPa, the spray angle is 53 °, and when the compressed air pressure is 0.3 MPa, the spray angle is 53 °. The angle is 53 °. In the case of 0.4 MPa, the spray angle was narrowed to 43 °.

  On the other hand, in the case where the entrainment suppressing means 74 (diameter φ100) composed of the flange portion 74a was provided, the angles were 84 °, 77 °, and 77 ° in the cases of 0.2 MPa, 0.3 MPa, and 0.4 MPa, respectively.

このことから、噴霧ノズル７１の圧搾空気圧が小さいほど噴霧角が大きくなることと、鍔状部７４ａからなる巻き込み抑制手段７４を備える方が噴霧角を大きくできることがわかる。ただし、圧搾空気圧を下げると噴霧量も大きくなる。

From this, it is understood that the spray angle increases as the compressed air pressure of the spray nozzle 71 decreases, and that the spray angle can be increased by providing the entanglement suppressing means 74 including the flange 74a. However, when the compressed air pressure is reduced, the spray amount also increases.

<Test 2>
The compressed air pressure was 0.3 MPa. The height of the entanglement suppressing means 74 composed of the flange 74a from the spray port 71a was set to the "high" position.

  As a result, as shown in Table 2, when the diameter φ of the flange portion 74a is 100 mm, the spray angle is 77 ° when the position is “high”, 61 ° when the position is “medium”, and “ It was 53 ° when “low”. When the diameter φ of the flange 74a is 120 mm, the spray angle is 77 ° when the position is “high”, and 70 ° and 61 ° when the position is “medium” and “low”.

このことから、鍔状部７４ａからなる巻き込み抑制手段７４の高さ（取り付け位置）が、噴霧ノズル７１の噴霧口７１ａに近いほど、噴霧角が大きくなることが判る。

From this, it is understood that the spray angle becomes larger as the height (attachment position) of the entanglement suppressing means 74 composed of the flange portion 74a is closer to the spray port 71a of the spray nozzle 71.

  In comparison with the results in Test 1, when the compressed air pressure was 0.3 MPa and the flange 74a was not provided, the spray angle was 53 °, and the mounting position “low” was determined in Table 2 with the flange 100a having a diameter of 100 mm. It can be seen that it is the same as the spray angle in the case of. From this, it can be determined that when the flange portion 74a has a diameter of φ100 mm and the mounting position is “low”, it hardly contributes to widening the spray angle.

<Test 3>
The compressed air pressure was 0.3 MPa, and the mounting position of the flange 74a was “high”.

  As a result, as shown in Table 3, the spray angle was 53 ° without the flange 74a, and the spray angle was 61 ° when the diameter φ of the flange 74a was 20 mm. Similarly, when the diameter was φ30 mm, the diameter φ40 mm, the diameter φ50 mm, and the diameter φ60 mm, the spray angle was 70 °, and when the diameter was φ70 mm, the diameter φ90 mm, the diameter φ100 mm, and the diameter φ120 mm, the spray angle was 77 °.

このことから、少なくとも鍔状部７４ａの取り付け位置が「高」の場合には、鍔状部７４ａの径が大きいほど、噴霧角が大きくなることが判る。

From this, it is understood that, at least when the attachment position of the flange 74a is “high”, the spray angle increases as the diameter of the flange 74a increases.

<Test 4>
The compressed air pressure was 0.3 MPa, and the mounting position of the flange 74a was “high”.

  As a result, as shown in Table 4, when there is no wall-shaped portion 74b (h = 0 mm), the spray angle is 77 °, when it is 15 mm, it is 95 °, when it is 20 mm, it is 100 °, The angle was also 100 ° in the case of 30 mm. In the case of 30 mm, as a result of the spray liquid colliding with the wall-shaped portion 74b, a liquid pool was observed in the entrainment suppressing means 74.

このことから、壁状部７４ｂを有し、壁状部７４ｂが高い方が、噴霧角が大きくなることが判る。また、壁状部７４ｂの高さが高くなると、噴霧液が壁状部７４ｂに衝突して巻き込み抑制手段７４内に液溜まりが発生するので、壁状部７４ｂの高さは噴霧角を考慮して設定すると良いことも判る。

From this, it is understood that the spray angle increases when the wall-shaped portion 74b is provided and the wall-shaped portion 74b is higher. Further, when the height of the wall portion 74b is increased, the spray liquid collides with the wall portion 74b and a liquid pool is generated in the entrainment suppressing means 74. Therefore, the height of the wall portion 74b is determined in consideration of the spray angle. You can see that it is better to set it.

  From the above test results, it can be said that the entrainment suppressing means 74 can increase the spray angle of the spray nozzle 71.

  In the coloring section 17 provided with the entrainment suppressing means 74 as described above, since the spray angle is widened, the spray range can be expanded, and the coloring of the hydrogen flame F can be performed widely and reliably. Therefore, the flame Fa can be made large and the flame color density can be improved. As shown in FIG. 1, a large flame Fa emitting a desired color can be obtained.

In addition, since the coloring of the hydrogen flame F is performed by spraying the coloring liquid, the colored combustion state can be continued for a long time as long as the supply of the coloring liquid is continued. In addition, when a color forming member made of a porous material is used, it is a solid substance, so transportation and preparation into an apparatus are necessary.However, in the present invention, a liquid coloring liquid is used. And easy to handle.
In the above test, a nozzle that sprays in an empty cone shape was used, but a nozzle that sprays in a fan shape or a full cone shape may be used. In the case of a nozzle that sprays in a fan shape, spraying of the coloring liquid outside the hydrogen combustion device 11 can be reduced. In addition, since the coloring liquid can be sprayed in a more squeezed form with respect to the hydrogen flame, it is also possible to color only the pair of burners depending on the positional relationship with the burner, and to produce a hydrogen flame F different from a hollow cone-shaped one. it can.

  When a plurality of types of coloring liquids are provided, the color of the flame Fa can be easily changed only by switching the liquid supply path 73. For this reason, the effect by the flame Fa can be effectively performed.

Further, the spray nozzle 71 is provided so as to be surrounded by a plurality of burners 15, and the spray nozzle 71 sprays the coloring liquid at a wide angle. Therefore, the hydrogen flame F emitted from the burner 15 is also used from this point. It can be colored effectively.
Contrary to the above, the spray nozzle may be arranged so as to surround the burner. In this case, by changing the same or different kinds of coloring liquids simultaneously or continuously, more various kinds of coloring of the hydrogen flame F can be performed.

  In the case where the baffle plate 53 is provided in the injection direction of the flame port 51 of the burner 15 that emits the hydrogen flame F, the hydrogen flame F is moved to the spray nozzle 71 side to promote contact with the sprayed coloring liquid or to emit the flame. By changing the movement of the hydrogen flame F to be obtained, it is possible to obtain the flame Fa in a desired mode.

  The above configuration is one mode for carrying out the present invention, and the present invention is not limited to only the above-described configuration, and other configurations can be adopted.

  For example, the entanglement suppressing means 74 may be constituted by only the wall-shaped portion 74b as long as entanglement of air from below the burner 15 can be reduced. The shape of the wall portion 74b may be other than the above-described cylindrical shape, other shapes such as a rectangular tube shape, a substantially conical cross section, a trapezoid, and a round bottom.

  Further, the flange 74a of the entanglement suppressing means 74 can be formed in various shapes as shown in FIG. 8, for example, in addition to the above-described circular shape in plan view. FIG. 8A shows a flange 74a having a rectangular shape in plan view, and FIG. 8B shows a flange 74a having a cloud shape in plan view surrounded by a curve like a cloud ruler. In addition to various external shapes, as shown in FIG. 8C, a flange portion 74a having an elongated triangular slit 75 at an appropriate position may be used. In the part having the slit 75, the spray angle cannot be widened, so that the spray form can be partially changed in the circumferential direction. If the position of the slit 75 is made to correspond to the spray port 71a, it is possible to make a portion which is likely to be dense spray thin.

  The baffle plate 53 provided on the burner 15 may be provided on all the burners 15 or may be provided partially.

DESCRIPTION OF SYMBOLS 11 ... Hydrogen combustion apparatus 15 ... Burner 17 ... Coloring part 51 ... Flame port 53 ... Baffle plate 71 ... Spray nozzle 71a ... Spray port 74 ... Entrapment suppressing means 74a ... Flange-shaped part 74b ... Wall-shaped part F ... Hydrogen flame

Claims (6)

A burner that burns hydrogen to emit a hydrogen flame, and a hydrogen combustion device including a coloring unit that colors the hydrogen flame,
The coloring section includes a spray nozzle that is provided at a position adjacent to the burner and sprays a coloring liquid exhibiting a flame reaction.
A hydrogen combustion device comprising: an entrainment suppression unit that is positioned in an air entrainment channel that is generated when the atomization nozzle sprays around a radial direction of the atomization nozzle. 2. The hydrogen combustion apparatus according to claim 1, wherein the entrainment suppressing means is at least one of a flange-shaped portion extending in an outer peripheral direction and a wall-shaped portion surrounding the outer periphery. 3. The entanglement suppressing means is a flange-shaped portion that protrudes in the outer peripheral direction,
The hydrogen combustion apparatus according to claim 1, wherein the flange-shaped portion is provided at a position on a side opposite to the spraying direction from a spraying port at a tip end of the spraying nozzle and close to the spraying port. As the entanglement suppressing means, a flange-shaped portion extending in the outer peripheral direction and a wall-shaped portion surrounding the outer periphery are provided,
The hydrogen combustion apparatus according to claim 1, wherein the wall-shaped portion is formed on a surface of the flange-shaped portion on a spray direction side of the spray nozzle. A plurality of said burners are provided,
The hydrogen combustion apparatus according to any one of claims 1 to 4, wherein the spray nozzle is provided to be surrounded by the burner. The hydrogen combustion apparatus according to any one of claims 1 to 5, wherein baffles are provided at intervals in an injection direction of a flame port of the burner.

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