JP3502144B2 - Combustion equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device for vaporizing and burning liquid fuel.

[0002]

2. Description of the Related Art Heretofore, in this type of combustion apparatus, it has been found that a flame port is formed by using a laminated plate. FIG. 5 shows a combustion apparatus using this laminated plate type flame port. As shown in the figure, in this combustion apparatus, kerosene atomized by primary air is vaporized and mixed on the inner wall of the vaporization cylinder 30, and burner head 3
A primary flame 33 is formed at the flame mouth 32 of No. 1. As shown in FIG. 6, the flame port 32 of the burner head 31 is formed by stacking a flame port plate 35 having a convex portion 34 formed by press working and a simple flat plate flame port spacer 36.
The flame gap 32 is formed between the and the convex portion 34. That is, from the bottom, the flame mouth plate 35a with the convex portion 34 on the lower side, the flame mouth plate 35b with the convex portion 34 on the upper side, the flame mouth spacer 36, the convex portion 34.
Are stacked on top of each other like a flame mouth plate 35c, the flame mouth head 37 is placed in this state, and it is fastened and fixed to the vaporization cylinder 30 with screws 38 together.

[0003]

However, in this combustion apparatus, the convex portion 34 is provided on the flame port plate 35 to form the flame port 32. Therefore, the heights of the convex portions are not uniform due to variations in press working. Therefore, there is a problem that the flame mouth area tends to vary and the combustion performance is difficult to stabilize.

Further, the flame mouth plate 35 has an elastic shape due to the convex portion 34, and when it is used for a long period of time, the fixation by screws etc. becomes loose due to ON-OFF of combustion, and the combustion performance is deteriorated, Moreover, there was a problem that durability was poor.

Further, since the convex portion 34 of the flame port plate 35 is sequentially stacked on the upper side and the lower side, that is, since the stacking has a direction, it is difficult to assemble and it is difficult to assemble the flame port plate 35 and the flame port. Since each of the spacers 36 is stacked on the vaporization cylinder 30 and fixed with screws, there is a problem that productivity is poor.

The present invention has solved the above-mentioned problems. A first object of the present invention is to enable stable combustion, and at the same time, to improve durability and assemblability, and further improve the assemblability and combustion performance. It is for the second and third purposes.

[0007]

In order to achieve the above object, the present invention provides a vaporization tube for vaporizing a liquid fuel and mixing it with combustion air, and an evaporation tube which is placed on the vaporization tube and has an opening in the center and a vertical edge.
Earth ring having a rising flange and this vaporization cylinder
The mixed gas from the
High-voltage discharge to the head and flange of the earth ring
Ignition to spark and start burning of burner head
The burner head is provided with an electrode, and the burner head has a flame mouth plate made of a flat plate whose outer periphery is cut out in a gear shape, and an opening having a diameter larger than the inner edge diameter of the notched portion of the flame mouth plate in the central portion. A flame port spacer made of a flat plate provided is configured to be stacked on top of each other, and an inner part of the cutout portion of the flame port plate is opened, and a flame port is formed on the outer side thereof, or the outermost flame port plate or The central opening of the flame port spacer is closed by a flame port head plate, and in the second invention, the flame port plates and the flame port spacers stacked alternately and the flame port head stacked on the outermost side thereof. The burner head unit is integrally formed by fastening means such as a screw, and the burner head unit is attached to the mixed gas outflow opening of the vaporization cylinder. Further, in the third invention, the burner head unit is provided on the outer periphery of the burner head. Surround the flame mouth A cylindrical combustion ring is provided, and a combustion air passage is formed on the outer circumference of the combustion ring, and the air from the combustion air passage is provided downstream of the burner head facing portion of the combustion ring on the downstream side of the burner head. The secondary air supply holes are provided.

[0008]

According to the first aspect of the present invention, the burner head can form the flame port only by alternately stacking the flame port plates and the flame port spacers and fastening them with the fasteners. Since they are both flat plates, they can be simply stacked and the assemblability is improved. Also, since the flame opening area is determined by the thickness of the flame opening plate, there is no variation in the flame opening area, and the conventional convex Since the part does not have elasticity unlike the pressed part, the fastener does not loosen even after long-term use, and stable combustion performance can be secured for a long time.

Further, according to the second structure, since the burner plate and the burner space are previously fastened with the fastener to form the burner head unit, the assembling to the vaporizing cylinder can be further facilitated,
Productivity is further improved.

Further, according to the third structure, the flame formed at the flame port can be cooled by the combustion ring, and NO
It is possible to suppress the generation of x and also suppress the generation of CO by the secondary air supplied from the secondary air holes,
Combustion performance can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, 1 is a nozzle for supplying a liquid fuel such as kerosene. Reference numeral 2 is a rotary body that atomizes the fuel from the nozzle 1 by centrifugal force, and 3 is a vaporization cylinder that incorporates the rotary body 2, and vaporizes the atomized fuel from the rotary body 2 and sends it from the upstream side. It mixes with the incoming combustion air and has an upper flange 3a.
An opening 3b is provided at the bottom, and a sheath heater 3c is embedded at the lower opening edge. Reference numeral 4 is an earth ring mounted on the flange portion 3a of the vaporizing cylinder 3, and has an opening 4 at the center.
a is provided with a rising flange 4b on the periphery.

Reference numeral 5 denotes a burner head mounted on the earth ring of the vaporizing cylinder 3, each of which is a flat flame plate 6,
The flame outlet spacers 7 are alternately stacked. That is, in FIG. 3, reference numeral 6 denotes a flame port plate, which is made of a flat disc and has an opening 6a at its center and a gear-like notch 6b at its outer peripheral edge. Reference numeral 7 is a flame mouth spacer also made of a flat disk, the outer diameter of which is formed to be the same as that of the flame mouth plate 6, and the center portion is the inner edge of the gear-shaped notch portion 6b of the flame mouth plate 6. An opening 7a having a diameter larger than the diameter is formed,
It is configured such that a part of the inner side of the gear-shaped notch portion 6b of the flame plate 6 is opened. Further, the flame nozzle plates 6 and the flame nozzle spacers 7 are alternately stacked on the earth ring 4 so that the cutout portions 6b of the flame nozzle plate 6 are matched with each other in the vertical direction. A flame mouth 8 is formed in the notch 6b of the mouth plate 6. Further, a disk-shaped flame port head plate 9 made of a flat plate is placed on the flame port spacer 7 located at the outermost side (the flame port plate 6 when the flame port plate 6 is located at the outermost side).
The burner head plate 9, the flame outlet spacer 7, the flame outlet plate 6, and the earth ring 4 are fastened together with fasteners 10 such as bolts and nuts to be integrated into a burner unit. A head 5 is formed.

In the figure, 11 and 12 are through holes for inserting fasteners for integrating the flame port plate 6 and the flame port spacer 7 with the flame port head plate 9 and the earth ring 4, and 13 and 14 are the above-mentioned. The vaporizer cylinder 3 is equipped with a burner head unit 5 in which each component is integrated.
Reference numeral 15 denotes a mounting hole portion for mounting to the.

The burner head 5 does not form a unit, but the flame port plates 6 and the flame port spacers 7 are alternately stacked on the earth ring 4 of the vaporizing tube 3, and the flame port head plate 9 is placed thereon. The fasteners may be integrally tightened and fixed to the vaporization tube 3, and in this case, the fasteners 10 and 15 may be used in common.

Reference numeral 16 denotes a bottomless cylindrical combustion ring provided around the flame opening of the burner head 5 so as to surround the flame opening 8. The combustion ring 16 is fixed to the shoulder of the flange of the vaporizing cylinder 3 with a screw 17. A cylindrical burner case 18 is provided on the outer periphery of the burner case 18, and a combustion air passage 19 through which the combustion air sent from the upstream side flows is formed between the burner case 18 and the burner case 18. Reference numeral 20 denotes a secondary air hole opened downstream from the flame mouth facing portion of the combustion ring 16, and 21 is a fan case fixed by caulking to the burner case 18 via a flange plate 21a.
Although not shown, the rotary body 2 is rotated and the vaporizing cylinder 3 is rotated.
Further, a motor for rotating a fan for supplying combustion air to the combustion air passage 19 is provided. Reference numeral 22 is an ignition electrode, and 23 is a primary flame.

In the above structure, in this combustion apparatus, the gear-shaped notch portion 6b of the flame nozzle plate 6 is formed simply by stacking the flame nozzle plate 6 and the flame nozzle spacer 7 which are made of flat plates and integrated them. The burner head 5 can be formed as the flame outlet 8. Moreover, the flame nozzle plate 6 and the flame nozzle spacer 7
Is a flat plate having a simple gear-shaped notch 6b, unlike the conventional one, in which the flame-shaped protrusion 6b is formed. It suffices to stack the mouth spacers 7 alternately, and there is no directivity in stacking as in the case of a conventional flame mouth plate having convex portions, and it can be easily assembled without any care. The gear-shaped notch portion 6b of the flame port plate 6 can be automatically aligned by passing the fastener 10 through the through holes 11 and 12 of the flame port plate 6 and the flame port spacer 7.

Further, in this embodiment, the flame port plate 6, flame port spacer 7, flame port head plate 9 and earth ring 4 are integrated with a fastener 10 to form a burner head unit. Occasionally, it suffices to mount and fix the burner head unit 5, and the productivity is greatly improved as compared with the case where the above components are stacked one by one.

On the other hand, the flame port 8 of this combustion apparatus is formed in the gear-shaped notch 6b of the flame port plate 6 by stacking the flat plate flame port plate 6 and the flame port spacer 7 as described above. The flame opening area is determined by the thickness of the flame opening plate 6, and the thickness of this opening can be regulated more accurately than in the conventional press-processed convex portion, so that the flame opening area does not vary. Even when mass-produced, the flame opening area can be made uniform. Also, as shown in FIG.
Since a part of the inner side of the opening 6b is opened,
The mixed gas supplied from the vaporizing cylinder 3 is
It is supplied to the flame tip 8 while diffusing through the opening.
Therefore, the mixed gas can be ejected uniformly from the flame port 8.
It Therefore, its combustion performance becomes stable. In addition, since it is possible to change the individual and whole flame opening areas only by changing the plate thickness and the number of the flame opening plates 6, there is an advantage that combustion devices having different combustion amounts can be easily designed.

Further, since both the flame mouth plate 6 and the flame mouth spacer 7 are simply flat plates, they do not have elasticity as in the conventional products having the convex portions, and they are integrally fixed even when used for a long time. The fastener 10 that does not come loose. Therefore, the durability is improved, and the stable combustion performance can be secured even after long-term use.

Next, the combustion operation of the above-mentioned combustion device will be described. In this combustion device, the fuel ejected from the nozzle 1 is atomized by the rotating body 2 and is heated in the vaporization cylinder 3 by the sheath heater 4 to a high temperature. It is vaporized and premixed with the primary air for combustion sent into the vaporization cylinder 3 by a fan or the like. This premixed gas is used for the downstream vaporizing cylinder opening 3a, the assling opening 4a, the flame mouth plate opening 6a, and the flame mouth spacer opening 7.
a, the gas is ejected from the flame nozzle 8 through a partial opening inside the flame nozzle plate outer peripheral cutout 6b. Then, when the spark electrode 22 sparks the flange 4b of the earth ring 4 to ignite it, combustion is started and a primary flame 23 is formed at the flame port 8.

Here, the primary flame 23 is cooled by the combustion ring 16 located on the outer periphery of the primary flame 23, becomes a combustion at a relatively low temperature, and suppresses the generation of NOx. Then, the secondary air supplied in a preheated state from the secondary air holes 20 on the downstream side is completely combusted, and the generation of CO is also suppressed, and good combustion is performed. Further, although the combustion ring 16 has a lower temperature than the primary flame, the temperature thereof becomes considerably high, so that the heat is transferred to the vaporization cylinder 3, and the heat recovery action of the combustion ring 16 to the sheath heater 3c of the vaporization cylinder 3. It is also possible to save electricity. Further, the flange 4b of the earth ring 4 is located outside the primary flame from the lowermost flame port 8 that is easily lifted to perform a flame holding action, and the combustion stability can be further improved.

FIG. 4 shows another embodiment, in which the outer diameter of the flame port spacer 7 is slightly smaller than the outer diameter of the flame port plate 6 and the same diameter 7y is formed. The burner head 5 is formed by alternately stacking these on the flame nozzle plates 6. As a result, every other one of the flame openings 8 formed in the burner head 5 has its opening edge spread like z, so that the flame holding property is improved and the variable combustion width can be expanded. Although this is not shown, the outer diameter of the flame port plate 6 may be smaller than the outer diameter of the flame port spacer 7. In this case, not only every other sheet but all of them may have a smaller diameter, and the same effect can be obtained. To be

In the above embodiment, the rotary body 2 for centrifugally atomizing the fuel is provided in the vaporization cylinder 3, but the fuel supplied from the nozzle is vaporized without providing the rotary body 2. The cylinder 3 may be directly vaporized on the inner peripheral wall surface, and the case where the cylinder 3 is arranged in the vertical direction has been described. However, the cylinder may be arranged in the horizontal direction. It is not limited to one.

[0024]

As is apparent from the above description of the embodiments, the combustion apparatus of the present invention can form a burner head by simply stacking and integrating flat flame nozzle plates and flame nozzle spacers, thus improving the assemblability. In addition, the flame opening area can be made uniform without variation, and the fastener that integrates the flame opening plate and the flame opening spacer does not loosen when the combustion is turned on and off, and the combustion performance is prolonged. It can be stabilized over a period of time and have high durability.

Further, in the case of the burner head unit in which the flame port plate, the flame port spacer and the like are integrated, the assembly into the vaporizing cylinder can be facilitated and the productivity is greatly improved.

Further, in the case where a combustion ring is provided on the outer circumference of the burner head flame to flow the combustion air, and the secondary air is supplied from the secondary air holes provided in the combustion ring, NOx and Generation of CO can be reduced, and combustion performance can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the combustion device.

FIG. 3 is an exploded perspective view showing a flame nozzle plate and a flame nozzle spacer of the combustion apparatus.

FIG. 4 is an enlarged sectional view of a combustion device according to another embodiment.

FIG. 5 is a sectional view of a conventional combustion device.

FIG. 6 is an exploded perspective view of a flame port plate and a flame port spacer of the combustion device.

[Explanation of symbols]

3 vaporization cylinder 5 burner head 6 flame mouth plate 6b Notch 7 Flame port spacer 8 flame mouth 9 Flame head plate 10 Fastening means (fasteners) 16 burning ring 19 Combustion air passage 20 Secondary air holes

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Nishikawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-4-359704 (JP, A) JP-A-51- 44327 (JP, A) JP 57-6211 (JP, A) Actually open 2-14520 (JP, U) Actually open 58-137230 (JP, U) Actually open 56-42620 (JP, U) Actual development Sho 50-96249 (JP, U) Actual development Sho 56-80425 (JP, U) Japanese patent publication 52-20688 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23D 11/04-11/08 F23D 11/40

Claims (3)

(57) [Claims] 1. A vaporization tube for vaporizing a liquid fuel and mixing it with combustion air, and an opening and a peripheral portion placed in the vaporization tube in the center.
This ring has a rising flange on the
Burn the mixed gas from the chemical cylinder and place it on the grounding ring.
High pressure to the burner head and the flange of the earth ring.
Spark the discharge and start burning the burner head
The burner head is provided with an ignition electrode, and the burner head has a flame mouth plate made of a flat plate whose outer periphery is cut out like a gear, and an opening having a diameter larger than the inner edge diameter of the notched portion of the flame mouth plate at the central portion. And a flame port spacer made of a flat plate, which are stacked on top of each other, and an inner part of the cutout portion of the flame port plate is opened, and a flame port is formed on the outer side thereof, and the outermost flame port plate is formed. Alternatively, a combustion device in which the central opening of the flame nozzle spacer is closed by a flame nozzle head plate. 2. A burner head unit is formed by integrally combining alternately stacked flame outlet plates and flame outlet spacers and flame outlet heads stacked on the outermost side thereof with a fastening means such as a screw, and the burner head unit. The combustion apparatus according to claim 1, wherein the gas is attached to the mixed gas outflow opening of the vaporization cylinder. 3. A burner head is provided with a cylindrical combustion ring on the outer periphery of the flame opening, and a combustion air passage is formed on the outer periphery of the combustion ring. The combustion apparatus according to claim 1, wherein a secondary air hole for supplying air from the combustion air passage to the downstream side of the burner head is provided on the side.