JP2001038252A - Nozzle and waste liquid combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely fine the particle diameters of a spray liquid to be sprayed as a spray fluid in a mist state by a spray medium and uniform a particle diameter distribution, and to provide a nozzle capable of stably controlling the spray angle at a prescribed angle. SOLUTION: A nozzle cap 15 is attached to the tip end part of a nozzle body 12 that sprays a spray fluid from the tip end. In this nozzle cap 15, at least a pair of injection holes 41, 42, which jet the spray fluid sprayed from the nozzle body 12, are formed at the inner periphery side and the outer periphery side of the nozzle cap 15 respectively. A pair of the injection holes 41, 42 are inclined toward the outer periphery side as they approach the tip end side, and the extension lines of their center lines extending to their tip end sides are made to cross each other at the tip end side of the nozzle cap 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle used for spraying waste liquid into a combustion chamber of a waste liquid combustion apparatus, for example, and a waste liquid combustion apparatus using the nozzle.

[0002]

2. Description of the Related Art As a waste liquid combustion apparatus of this type, an apparatus in which waste liquid sprayed from a nozzle into a combustion chamber of the apparatus in a mist state is burned by a combustion burner and treated is disclosed in, for example, Japanese Patent Laid-Open No. HEI 1 (1999).
It has been proposed in Japanese Patent Publication No. 0-332127. Here, FIG. 7 shows a nozzle 1 for spraying a waste liquid of the waste liquid combustion apparatus described in this publication.
Is a double pipe structure in which a nozzle pipe 4 is inserted coaxially with a radial gap between the outer cylinder 3 and the outer cylinder 3 attached to the inner periphery of the outer cylinder 3 attached to the main body 2 of the spray head. It is said that
The nozzle pipe 4 is connected to a tank for a waste liquid as a spray liquid, and high-pressure air is supplied as a spray medium between the inner circumference of the outer cylindrical portion 3 and the nozzle pipe 4. The waste liquid is sucked out from the tip of the nozzle tube 4 by the negative pressure generated by this air being ejected from between the outer cylinder portion 3 and the nozzle tube 4, and the waste liquid is atomized by the ejected air. Sprayed into the combustion chamber.

[0003]

By the way, in order to achieve efficient waste liquid combustion in such a waste liquid combustion apparatus,
The particle size of the waste liquid sprayed from the nozzle 1 in the form of a mist is small,
In addition, it is desirable that the spraying be performed so that the particle size distribution is as uniform as possible and the spraying angle is controlled at a predetermined spraying angle according to the combustion conditions. However, in the nozzle 1 configured as described above, the waste liquid sucked out from the tip of the nozzle tube 4 is only atomized and sprayed by air. The amount must be increased, which is uneconomical, and there is naturally a limit in achieving uniform particle size distribution and reliably controlling the spray angle. In addition, the above-mentioned publication proposes that the waste liquid sprayed is diffused by helically blowing air from behind the nozzle 1 into the combustion chamber, but for that purpose, a blowing mechanism must be provided. In addition to the above, the structure of the apparatus may be complicated, and the blowing may hinder stable combustion of the waste liquid in the combustion chamber.

The present invention has been made in view of such a background, and it is intended to surely reduce the particle diameter and uniformize the particle diameter distribution of a spray liquid which is atomized by a spray medium as a spray fluid and sprayed. It is another object of the present invention to provide a nozzle capable of stably controlling the spray angle to a predetermined angle, and a waste liquid combustion apparatus using the nozzle.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve such an object, the present invention provides a nozzle cap which is provided at a tip end of a nozzle body from which a spray fluid is sprayed. On the cap, at least a pair of injection holes for injecting the spray fluid sprayed from the nozzle body are formed on the inner peripheral side and the outer peripheral side of the tip of the nozzle cap, respectively, and these pair of injection holes are respectively formed on the tip side. As you move toward
An extension of the center line of each nozzle to the tip side is crossed at the tip side of the nozzle cap. Therefore, the spray fluid sprayed from the tip of the nozzle body is
A pair of injection holes formed in the nozzle cap are jetted to the tip side of the nozzle cap.The pair of injection holes intersect an extension line of the center line of the nozzle cap to the tip side of the nozzle cap at the tip side of the nozzle cap. Therefore, the spray fluid sprayed from each spray hole is made to collide with each other at the intersection of the above-mentioned extended lines, thereby minimizing the spray particles and generating spray particles having a large particle diameter. Thus, the particle diameter can be made uniform, and the spray can be sprayed at a predetermined spray angle along the bisector of the extended lines.

Here, when the intersection angle of the extension line of the center line intersecting at the tip end side of the nozzle cap is too small, for example, when the two extension lines are too close to a parallel state, the pair of injection holes will not be formed. Collision between the spray particles ejected from the injection hole becomes difficult to occur, and there is a possibility that the above-mentioned atomization of the spray particles may not be made fine and the particle diameter may not be uniform, but on the contrary, the intersection angle of both extension lines is too large. For example, if the sprayed particles collide with each other in a state closer to the head-on collision, the collided particles may be integrated, leading to an increase in the particle diameter or unevenness. For this reason, it is desirable that the intersection angle is set in a range of 5 ° to 50 °. In addition, the tip surface of the nozzle cap has a first tapered surface toward the tip side as it goes toward the inner peripheral side, and a first tapered surface located on the inner peripheral side of the first tapered surface and smaller than the first tapered surface. A second tapered surface is formed at a taper angle toward the distal end, and an outer one of the pair of injection holes is formed on the first tapered surface, and an inner one is formed on the second tapered surface. It is desirable that the pair of injection holes be formed so as to open in a state close to a perfect circle at the tip end surface of the nozzle cap.

On the other hand, in the nozzle body, first, a supply path for supplying a spray liquid to be atomized and sprayed, and a supply path for supplying a spray medium for atomizing the spray liquid and spraying the same. By forming a plurality of supply paths of the spray fluid having a, these supply paths, by allowing each of the spray liquid and the spray medium to be swirled to enable spraying,
Since the spray liquid which is swirled and ejected while being dispersed is further dispersed by the spray medium which is also swirled and ejected and sprayed in the form of a mist, a synergistic effect due to the swirl of the spray liquid and the swirl of the spray medium As a result, the particle size of the spray particles is further reduced, and the formation of large particles is prevented, so that the distribution of the particle size is surely uniformed.
Further, by appropriately controlling the swirling flow of each spray fluid, the spray angle can be stably controlled to a predetermined size.

Further, in this nozzle body, secondly, by forming a plurality of supply paths for spraying the spray fluid by swirling in opposite directions, the spray fluids swirling in opposite directions collide with each other. Thus, the particles of the spray liquid can be impacted to further refine and uniform the particle size distribution, and the spray angle can be controlled by the size of the swirling flow of each spray fluid.
And especially in this case, if the spray fluids swirled in opposite directions are used as a spray liquid to be atomized and sprayed, and a spray medium for spraying the spray liquid into a spray, the swirling spray By colliding the liquid with the spray medium swirling in the opposite direction, the spray particles can be more reliably dispersed and refined, and the particle diameter can be further uniformed.

Further, when each spray fluid is sprayed while being swirled, the nozzle body is
In a cross section orthogonal to the central axis of the nozzle body, the plurality of supply paths are respectively disposed on a plurality of concentric circles centered on the axis, and these supply paths are centered on the tip side of the nozzle body. By communicating with a swirling circuit extending in the tangential direction of the circle and opening the swirling chamber formed on the axis, it is possible to form an even swirling flow by each spray fluid. Further, it is possible to achieve more reliable refinement of the particle diameter, uniform distribution of the particle diameter, and stable control of the spray angle. Further, in this case, in particular, if at least a part of the circling circuit of at least a part of the plurality of supply paths is formed in a member detachable from the nozzle body, this member can be a different circulating circuit. By changing to a member formed with, for example, the spray angle can be set to a predetermined angle in a wider range, and corrosion of the supply path, particularly the swirl part, due to the properties of the spray fluid and the like can be achieved. Even if wear, clogging, or the like occurs, it is possible to quickly cope with this by exchanging the above members. Of course, with respect to all of the plurality of supply paths, at least a part of the circuit may be formed as a member detachable from the nozzle body.

Further, a supply pipe for supplying a spray fluid to the plurality of supply paths is described in Japanese Patent Application Laid-Open No. H10-332127.
As described in Japanese Patent Application Publication No. H10-209, a double tube structure in which a nozzle tube is inserted coaxially with the inner peripheral portion of the outer cylinder portion may be used, for example, when these spray fluids have a large temperature difference, When the supply pipe has such a double-pipe structure, heat exchange may occur between the two, which may hinder smooth spraying. Therefore, in such a case, the nozzle main body can be connected to a plurality of spray fluid supply pipes communicating with the plurality of supply paths at intervals from each other,
It is desirable to thermally isolate these spray fluids from each other.
Further, the waste liquid combustion device of the present invention is a waste liquid combustion device provided with such a nozzle, and supplies the waste liquid to a part of the plurality of supply paths as a spray fluid. It is possible to atomize with a uniform particle size distribution and spray at a predetermined spray angle, and to achieve efficient combustion.

[0011]

1 to 3 show a first embodiment of a nozzle according to the present invention. In a nozzle 11 of this embodiment, a nozzle body 12 has a bottom portion at a tip end side. A disk-shaped secondary atomizer 14 is attached to the above-mentioned tip of the substantially cylindrical bottomed primary atomizer 13, and a nozzle cap 15 is attached to the tip of the primary atomizer 13. In addition, these 1
Next and second atomizers 13 and 14 and nozzle cap 1
Reference numeral 5 is formed of a metal material such as stainless steel.
The rear end of the primary atomizer 13 of the nozzle body 12 thus configured is attached to the tip of the supply pipe 16 for the spray fluid and attached to the supply pipe 16. here,
In the present embodiment, the supply pipe 16 for the spray fluid is an inner pipe 17.
Has a double pipe structure coaxially inserted into and supported by the outer pipe 18, and the tip of the inner pipe 17 is disposed at a position slightly retreated from the tip of the outer pipe 18. In the embodiment, the spray liquid of the spray fluid in the inner pipe 17 and the spray medium of the spray fluid in the annular space between the inner pipe 17 and the outer pipe 18 have a predetermined supply amount. Is supplied toward the tip side.

A groove 19 is formed on the rear end surface of the primary atomizer 13 so as to orbit around the central axis O of the primary atomizer 13. This groove 19 and the inner periphery of the primary atomizer 13 are formed. Cylindrical section 21 defined between the section and section 20
Is formed so as to protrude to the rear end side by one step from the cylindrical wall portion 22 defined on the outer peripheral side of the concave groove 19, and the cylindrical wall portion 21 is formed at the tip of the inner pipe 17 of the supply pipe 16. The cylindrical wall portion 22 is joined to the tip of the outer tube 18.
Note that the concave groove 19 is formed such that the inner wall surface on the outer peripheral side is reduced in diameter by one step toward the distal end side through a tapered portion. Face
The outer diameter of the primary atomizer 13 is increased by one step via a tapered portion in the distal end portion where the outer diameter is reduced by one step, and is formed so as to reach the bottom of the primary atomizer 13 having a bottomed cylindrical shape. A pair of flat surfaces 23, 23 parallel to each other are formed on the outer peripheral surface of the cylindrical wall portion 22 of the primary atomizer 13, and a male screw portion 24 is formed on the outer peripheral surface of the distal end portion.
Are formed.

Further, from the bottom surface facing the rear end side of the concave groove 19, a large number (24 in this embodiment) of small-diameter holes 25 having a circular cross section are formed with the axis O in a cross section orthogonal to the axis O. They are formed at equal intervals on one centered circle A and parallel to the axis O toward the distal end side. On the other hand, the small-diameter hole 25
Are formed along the circle A and each of the small-diameter holes 25 has an opening in the bottom surface facing the tip side of the groove 26. Have been allowed.

Further, from the enlarged bottom surface of the inner peripheral portion 20 of the primary atomizer 13, a large number of small-diameter holes 27, also having a circular cross section, are formed around the axis O in a cross section orthogonal to the axis O. The small-diameter holes 27 are formed at equal intervals on the one circle B having a smaller diameter than the circle A and in parallel with the axis O toward the distal end side. A concave groove 28 having a width of slightly larger than the inner diameter and having a U-shaped cross section is formed along the circle B, and each small-diameter hole 27 is opened at the bottom surface facing the tip side of the concave groove 28. I have. Accordingly, the small diameter holes 25,.
27 and the concave grooves 26, 28 are respectively disposed on concentric circles A, B about the axis O in a cross section orthogonal to the axis O.

In this embodiment, the small-diameter hole 2 on the inner peripheral side is used.
7 and the groove width of the concave groove 28 are smaller than the small-diameter hole 25 on the outer peripheral side.
And the groove width of the concave groove 26 is larger than
Further, the depth of the groove 28 is made deeper than that of the groove 26. However, the number of the small-diameter holes 27 is smaller than that of the small-diameter holes 25. In particular, in the present embodiment, the small-diameter holes 25 are an even number of 24, whereas the small-diameter holes 27 are 12 of the half. In addition, each small diameter hole 27 is disposed so as to be located alternately between the small diameter holes 25 adjacent to each other in the circumferential direction, and a sufficient thickness is secured between the small diameter holes 25. It has been made like that.

Further, on the tip surface of the primary atomizer 13,
On the axis O, a cross section orthogonal to the axis O is the axis O.
Is formed, and a plurality of (four in this embodiment) concave grooves having a U-shaped cross section are formed between the rotational chamber 29 and the concave groove 28. 30 ...
Are formed at equal intervals in the circumferential direction. This concave groove 30
The center line C in the groove width direction when viewed from the tip side in the direction of the axis O.
Extends in the tangential direction of the circle D about the axis O,
The groove 30 is formed so as to turn clockwise about the axis O from the groove 28 toward the swirl chamber 29. In particular, in the present embodiment, the inner wall surface 30A of the groove 30 which faces in the counterclockwise direction is formed. The swivel chamber 29 is formed so as to open in contact with the inner peripheral surface thereof. Meanwhile, the groove 3
The inner wall surface 30B facing the clockwise direction of 0 intersects the inner peripheral surface of the swirling chamber 29 at an acute angle when viewed from the tip side in the axis O direction, that is, from the plane parallel to the inner wall surface 30A through the axis O. Are also formed on the inner wall surface 30A side.

The secondary atomizer 14 has a disk shape having an outer diameter equal to the outer diameter of the front end surface of the primary atomizer 13, and its center line is coaxial with the axis O of the primary atomizer 13. Attached to its tip. here,
The small-diameter hole 25 is provided on the outer peripheral side of the secondary atomizer 14.
Small-diameter holes 31 having the same diameter and the same number of circular cross-sections are formed at equal intervals on the same circle A as the small-diameter holes 25. Each of the secondary atomizers 14 is formed parallel to the axis O toward the side,
A concave groove 32 having the same width and depth as the concave groove 26 and having a U-shaped cross section is also formed along the circle A. The small-diameter holes 31 are opened at the bottom surface of the concave groove 32. Have been.
Therefore, with the secondary atomizer 14 attached to the tip of the primary atomizer 13 as described above, the small-diameter hole 25
.., 31 communicate with each other through the concave groove 26 and open through the concave groove 32 to the distal end face of the secondary atomizer 14, that is, to the distal end of the nozzle body 12.

Further, the secondary atomizer 14 is attached to the secondary atomizer 14 along the axis O from the front end surface thereof.
A swirling chamber 33 penetrating through 4 and communicating with the swirling chamber 29 is formed. The swirl chamber 33 is provided with the secondary atomizer 14.
The rear end of the secondary atomizer 14 has the same diameter as that of the swirl chamber 29 and extends toward the front end with the same diameter, and then gradually decreases in diameter at the tapered portion 33A toward the front end. The opening 33 </ b> B on the side is formed so as to increase the diameter by one step with a diameter larger than that of the swirling chamber 29.

Further, the opening portion 33B of the swirl chamber 33 and the concave groove 3 are formed on the tip end surface of the secondary atomizer 14.
A plurality (four in the present embodiment, like the concave groove 30) of the concave grooves 34 are formed at regular intervals in the circumferential direction. The concave groove 34 has a center line E in the groove width direction, similar to the concave groove 30 when viewed from the tip side in the direction of the axis O, in which the center line E of the circle F about the axis O having a larger diameter than the circle D is used. Although it is formed so as to extend in the tangential direction, its direction is such that it goes counterclockwise around the axis O as it goes from the groove 32 side to the swirl chamber 33 side, that is, the groove 30 Are oriented in the opposite direction. In this concave groove 34, the inner wall surface 34A facing the clockwise direction is formed by the opening 3 of the swirl chamber 33.
3B is formed so as to open in contact with the inner peripheral surface,
On the other hand, the inner wall surface 3 of the concave groove 34 which faces in the counterclockwise direction.
4B crosses the inner peripheral surface of the opening 33B of the swirl chamber 33 at an acute angle when viewed from the tip side in the direction of the axis O, that is, the inner wall surface 34A side from the plane parallel to the inner wall surface 34A through the axis O. Is formed.

On the other hand, the nozzle cap 15 has a substantially bottomed cylindrical shape with a thick bottom, and is attached with the bottom facing the front end, and the inner peripheral portion facing the rear end. The external thread portion 24 of the primary atomizer 13 is formed on the inner peripheral surface of the enlarged diameter portion.
Is formed with a female screw portion 35 to be screwed into the. Further, the portion of the inner peripheral portion which is reduced in diameter by one step on the front end side is sized so that the innermost portion thereof can be fitted with the secondary atomizer 14 and the foremost portion of the primary atomizer 13 having the same outer diameter. And the length in the direction of the axis O is the above-mentioned secondary atomizer 1
4 is slightly larger than the thickness of the secondary atomizer 14 and shorter than the sum of the thickness of the secondary atomizer 14 and the length from the distal end surface of the primary atomizer 13 to the distal end of the male screw portion 24. A pair of flat surfaces 36, 36 parallel to each other are also formed on the outer periphery of the tip of the nozzle cap 15.

Further, the tip end surface of the nozzle cap 15 is chamfered at its outer peripheral portion into a convex arcuate cross section, and the inner peripheral side is further tapered toward the distal end side toward the inner peripheral side. 37, the inner peripheral side is formed as a second tapered surface 38 heading toward the distal end side at a smaller taper angle than the first tapered surface 37, and then circular at right angles to the axis O at the center. Is a flat surface 39. A concave hole 40 having the same diameter as the opening 33B of the swirl chamber 33 of the secondary atomizer 13 is formed along the axis O in the center of the bottom surface of the inner peripheral portion on the back side of the front end surface. A bottom surface 40A facing the rear end side of the concave hole 40 is formed in a concave conical surface centered on the axis O. Further, from the concave hole 40 to the tip end surface of the nozzle cap 15, a pair of injection holes is formed. A plurality of pairs 41 and 42 (6 pairs in the present embodiment) are formed at equal intervals in the circumferential direction.

The pair of injection holes 41 and 42 have a circular cross section with the same inner diameter, and are arranged with their center lines on one plane including the axis O. Are arranged at regular intervals in the circumferential direction, and the injection holes 41 are formed between the inner peripheral surface of the concave hole 40 and the bottom surface 40A.
The injection hole 42 is opened from the inner circumferential side of the bottom surface 40 </ b> A of the concave hole 40 so as to open from the intersection ridge line portion to the inner peripheral edge of the first tapered surface 37 on the tip end surface of the nozzle cap 15. Both are inclined so as to open toward the outer peripheral side toward the distal end side so as to open toward the outer peripheral side in the middle of the second tapered surface 38 at the distal end surface. However, the inclination angle of the outer peripheral side injection hole 41 with respect to the axis O is the inner peripheral side injection hole 42.
Is formed so that the injection holes 41 and 42 approach each other on the plane and approach the front end side, and the extension lines of the center lines intersect with each other. The intersection angle θ between the center lines of the injection holes 41 and 42 is set in a range of 5 ° to 50 °.

The nozzle 11 of this embodiment has a nozzle main body 12 in which the secondary atomizer 14 is coaxially arranged at the tip of the primary atomizer 13 as described above.
Furthermore, the female screw portion 35 is screwed into the male screw portion 24 and the nozzle cap 15 is attached to the distal end thereof, so that the secondary atomizer 14 and the foremost portion of the primary atomizer 13 are located on the tip side of the inner peripheral portion of the nozzle cap 15. It is fitted and accommodated in the reduced diameter portion and is assembled integrally. Therefore, the secondary atomizer 14 can be attached to and detached from the primary atomizer 13 by attaching and detaching the nozzle cap 15. Also,
In this assembled state, the rear end surface of the secondary atomizer 14 is in close contact with the front end surface of the primary atomizer 13 and the grooves 28, 3 are formed.
.. Are closed, and the concave groove 26 and the small-diameter holes 31 are communicated as described above.
The portion around the concave hole 40 on the inner peripheral bottom surface of the nozzle cap 15 is in close contact with the front end surface of the next atomizer 14 to form the concave groove 3.
The opening portions on the distal end side of 2, 34 ... are closed.

Therefore, in this assembled state, from the primary atomizer 13 to the secondary atomizer 14, the concave groove 19, the small diameter holes 25,.
6. The small-diameter holes 31... And the concave grooves 32 communicate with each other to form a supply path of the spray fluid (spray medium) on the circle A on the outer peripheral side thereof, and the tip of the secondary atomizer 14 By closing the opening on the distal end side of the concave groove 34 by the nozzle cap 15, a spiral circuit extending in the tangential direction of the circle F is defined, and the supply path is communicated with the spiral circuit to be on the axis O. Is opened in the swirling chamber 33 formed at the center. On the other hand, the inner peripheral portion 20 of the primary atomizer 13
The small-diameter hole 27 formed on the circle B concentric with the circle A
The groove 28 forms a supply path of the spray fluid (spray liquid), and the supply path is defined by the circle F defined by closing the opening at the front end of the groove 30 at the rear end surface of the secondary atomizer 14. The swirling chamber 3 communicates with a swirling circuit extending in the tangential direction of
3 is opened to the swirl chamber 29 communicating with the third chamber 3. The swirling chamber 33 is further provided with a concave hole 40 of the nozzle cap 15.
Are connected to the injection holes 41, 42,.

The nozzle 11 having the above-described configuration according to the above-described embodiment is, for example, in the waste liquid combustion apparatus according to the embodiment of the present invention shown in FIG. 4, in which the waste liquid is sprayed into the combustion chamber 51 as a spray fluid (spray liquid). It is used for spraying. Here, in the waste liquid combustion apparatus of this embodiment, the combustion chamber 51 has a vertical cylindrical shape, and an auxiliary burner 52 is attached to the center of the upper part of the combustion chamber 51 downward in the center line X direction of the combustion chamber 51, A plurality of nozzles 11 are arranged on the shoulder of the upper part of the combustion chamber 51 around the auxiliary burner 52 such that the axis O intersects one point on the center line X. In these nozzles 11, waste liquid is supplied as a spray liquid into the inner pipe 17 of the supply pipe 16, and compressed air or steam is sprayed as a spray medium between the inner pipe 17 and the outer pipe 18. By being supplied, the waste liquid is atomized by the spray medium and is sprayed from the injection holes 41, 42,.
The fuel is burned by the combustion burner 52.

In this waste liquid combustion apparatus, a recovery tank 54 having a dissolver 53 for spraying a dissolved liquid therein is provided below the combustion chamber 51, and the waste liquid is burned in the combustion chamber 51 by burning the waste liquid. The alkali and the like in the generated combustion exhaust gas are dissolved, and the dissolved alkali and the like are recovered in the recovery tank 54 as a solution. Here, what is indicated by reference numeral 55 in the drawing is a stirrer for the recovered solution. The recovery tank 54 is provided with a cooling tower 57 provided with a cooler 56 for spraying a cooling liquid therein, and the exhaust gas in which alkali or the like is dissolved and recovered by the dissolver 53 is supplied to the cooling tower 57. , And then discharged by a dust scrubber (not shown) or as a heating source of an evaporator. The dissolving liquid sprayed from the dissolver 53 and the cooling liquid sprayed from the cooler 56 include the recovery tank 5
Part of the solution recovered in 4 is circulated and used. Further, the remaining solution is discharged out of the system through the discharge port 58.

However, in the nozzle 11 of the embodiment, the spray liquid such as the waste liquid supplied into the inner pipe 17 of the supply pipe 16 is supplied from the inner peripheral portion 20 of the primary atomizer 13 to the small-diameter hole 27 as described above. , And into the swivel chamber 29 of the secondary atomizer 14 by being sent to the tip side of the primary atomizer 13 through the concave groove 28 and further flowing into the swirl chamber 29 from the concave groove 30.
It is gushing. On the other hand, the spray medium such as the compressed air or steam supplied between the inner pipe 17 and the outer pipe 18 of the supply pipe 16 also passes from the groove 19 through the small-diameter holes 25. After being sent to the distal end side of the primary atomizer 13 and further to the distal end side through the small-diameter holes 31 and the concave grooves 32 of the secondary atomizer 14, the concave grooves 34.
Flows into the opening 33 </ b> B on the distal end side of the swirling chamber 33. Then, in the opening 33B, the spray liquid is atomized by the spray medium and sprayed toward the distal end side.
42 and is sprayed toward the tip end of the nozzle 11.

In the nozzle 11 having the above-described structure, the nozzle cap 15 is attached to the tip of the nozzle body 12, and the spray fluid sprayed from the swirl chamber 33 passes through the recess 40 of the nozzle cap through the injection hole. 41 ..., 42
Are sprayed to the tip of the nozzle 11 through. Each of these injection holes 41, 42,... Is formed on the same plane including the axis O, and is formed in a direction approaching each other toward the distal end, and an extension of the center line toward the distal end. Are arranged so as to intersect at the tip end side of the nozzle cap 15, so that the spray fluid ejected from each of the ejection holes 41 and 42 collides at the intersection of the extension lines of the ejection holes 41 and 42. Becomes Therefore, according to the nozzle 11 having the above-described structure, the particle size of the spray particles can be further reduced by the impact at the time of the collision, and the formation of particles having a large particle size due to this can be prevented. Therefore, it is possible to promote uniformization of the particle size distribution. Moreover, the spray particles collided in this way are sprayed along the bisector of the extended lines with a distribution corresponding to the collision angle, and thus the collision angle and the axis of the bisector are described. The spray angle can be controlled to a predetermined angle by the angle with respect to O.

When the nozzle cap 15 is attached to the tip of the nozzle body 12 to collide the spray fluid jetted from the jet holes 41 and 42, the jet particles are dispersed by the collision as described above. On the other hand, while the particle size is reduced, the spray particles collide with each other to form integrated spray particles having a large particle size, and the particle size distribution may become non-uniform. Here, in such a case, when the spray particles collide with each other, whether they are dispersed or integrated by the impact, the collision angle at which the spray particles collide with each other during the collision,
That is, the intersection angle θ between the center lines of the injection holes 41 and 42 from which the spray particles are ejected has an influence, and when the intersection angle θ is large, for example, 180 ° and the spray particles collide head-on, The possibility of integration is also increased.
However, on the other hand, when the intersection angle θ is too small, for example, 0 ° and the spray particles scatter in parallel, the collision itself does not occur, and therefore, the particle size is reduced by the dispersion of the spray particles. Cannot occur. For this reason, both injection holes 4
It is desirable that the spray particles ejected from the nozzles 1 and 42 are set so as to collide at an appropriate angle. Accordingly, in the present embodiment, the intersection angle θ is set in a range of 5 ° to 50 °.

When the spray fluid is ejected from the injection holes 41 and 42, each of the injection holes 41 and 42 is opposed to the first and second tapered surfaces 37 and 38 where the injection holes 41 and 42 are opened. , 42 obliquely intersect, the injection hole 4
The circle formed by the opening portions 1, 42 becomes elliptical,
In the cross section along the major axis of this ellipse, the injection holes 41, 42 and the tapered surfaces 37, 38 intersect at an obtuse angle at one end of the major axis and at an acute angle at the other end, and The spray angle may be different. Therefore, these injection holes 41, 42 and the first and second tapered surfaces 37,
It is preferable that the injection hole 41 is formed so as to intersect at an angle closer to the vertical with respect to the axis O. Therefore, in the present embodiment, the outer peripheral side injection hole 41 having a small inclination angle with respect to the axis O has a large taper angle with respect to the axis O. 1 and the inner peripheral side injection hole 42 having a large inclination angle with respect to the axis O is opened to the second tapered surface 38 having a small taper angle. 37 and 38 are crossed at an angle close to vertical, and each opening is designed to have a shape close to a perfect circle.

On the other hand, in the nozzle 11 of the present embodiment, the above-mentioned concave grooves 30 to which the spray liquid is supplied are formed so as to extend in the tangential direction of the circle D centering on the axis O, thereby forming a circuit. , The spray liquid flowing into the swirling chamber 29 generates a swirling flow around the axis O, and is jetted as it is into the swirling chamber 33 of the secondary atomizer 14, and the concave grooves 34 to which the spraying medium is supplied also have the axis O. Extends in the tangential direction of a circle F centered on a circle, thereby forming a swirl circuit, so that the spray medium also generates a swirling flow about the axis O. Therefore, the particles of the atomized liquid atomized by the swirling flow of the atomizer are further atomized by the swirling flow of the spray medium. The synergistic effect of the double swirling flow of the spray liquid and the spray medium can further reduce the particle size of the spray liquid and ensure that particles with a large particle size are formed. It is possible to promote the uniformity of the particle size distribution by preventing the particle size distribution.

Further, according to the present embodiment, since the spray liquid and the spray medium as the spray fluids are respectively formed and sprayed in the form of a swirl flow, the swirl flow of each spray fluid is appropriately controlled. This also makes it possible to stably control the spray angle to a predetermined value. That is, for example, even if the supply amount of the spray liquid is the same, a large spray angle can be obtained by increasing the supply amount of the spray medium or increasing the supply pressure to increase the swirling flow,
Conversely, if the swirling flow is reduced by reducing the supply amount of the spray medium or reducing the supply pressure, the spray angle can be reduced. Contrary to this, the spray angle may be controlled by adjusting the swirl flow of the spray liquid while keeping the swirl flow of the spray medium constant, or adjusting the swirl flow of both the spray liquid and the spray medium. You may do so. Further, the grooves 30 forming a circuit of the spray liquid and the spray medium.
By appropriately adjusting the shape, size, number, and the like of..., 34, the swirling flow can be adjusted, and the spray angle can be controlled.

In addition, in addition to the above, the nozzle 11 of the present embodiment is provided with the concave grooves 30 which form the circuit of the spray liquid.
Are formed so as to extend in opposite directions to each other in the tangential direction of the circles D and F around the axis O. The swirling flow formed by the spray liquid and the spray medium is in opposite directions to each other. Specifically, in the present embodiment, when viewed from the tip side in the direction of the axis O, the grooves 30 extend in the tangential direction of the circle D in a clockwise direction from the groove 28 toward the swirling chamber 29 on the inner peripheral side. Therefore, the swirling flow of the spray liquid is also in the clockwise direction, whereas the concave groove 34 is in the counterclockwise direction from the concave groove 32 toward the inner peripheral swirling chamber 33 in the tangential direction of the circle F. And the swirling flow of the spray medium is also in a counterclockwise direction. Therefore, according to the nozzle 11, the two spray fluids swirling in opposite directions are sprayed while colliding with each other, and the particles of the spray liquid can be further finely dispersed by the impact at that time. This makes it possible to achieve a finer particle diameter and a uniform particle diameter distribution, and to control the spray angle by adjusting each swirling flow more accurately and more precisely.

Therefore, according to the waste liquid combustion apparatus of the above embodiment in which such a nozzle 11 is attached as a nozzle for spraying waste liquid, the waste liquid as the spray liquid is sprayed as extremely fine particles having a uniform particle size distribution, In addition, since the spray angle can be controlled to a predetermined size, the sprayed waste liquid can be efficiently burned by the auxiliary burner 52, and even in the waste liquid containing alkali as described above. Reliable processing can be achieved. In addition, since the spray angle can be precisely controlled, it is possible to prevent the waste liquid from scattering to a portion other than the predetermined position of the combustion chamber 51. Therefore, the combustion chamber 51 is downsized to reduce the size of the entire apparatus. It becomes possible to plan. Moreover, in the nozzle 11 of the present embodiment, a predetermined supply amount of waste liquid can be sprayed due to the synergistic effect of the above-described double swirling flow and the collision effect of reversing the direction of these swirling flows. Since a smaller amount of compressed air or steam is required than in the past, there is also obtained an advantage of being economical.

In the waste liquid combustion apparatus, the nozzle 11 is used as a nozzle for spraying the waste liquid. For example, a nozzle for spraying the dissolved liquid of the dissolver 53 and a nozzle for spraying the cooling liquid of the cooler 56 are used. The above nozzle 1 as a nozzle
Of course, it is also possible to use 1. Further, the nozzle of the present invention can be applied to a fuel injection nozzle of a direct injection in-cylinder injection engine described in, for example, JP-A-10-331739, in addition to the nozzle used in such a waste liquid combustion device. However, it is also effective when used in various applications, such as for other types of combustion devices and water sprinkling.

By the way, in the nozzle 11 of the present embodiment,
Since the spray liquid and the spray medium each form a swirl flow, the particle diameter of the spray liquid can be further reduced, the particle diameter distribution can be made uniform, and the spray angle can be controlled stably. Paying attention only to these, the directions of these swirling flows do not necessarily have to be the opposite directions as in the above embodiment, and a sufficient effect can be obtained even if the two swirling flows have the same direction. Further, in the nozzle 11 of the present embodiment, the above-described effect can be obtained even when the spray fluids swirling in opposite directions collide with each other. Even if the spray liquid such as waste liquid and the spray medium such as compressed air or steam are not used, the spray liquid and the spray medium may be used in advance, such as a mixture of fuel and air as in the case of the fuel injection nozzle as described above. May be a mixed fluid, in other words, the present invention can be applied to such a nozzle.

However, when the spray fluids are swirled in opposite directions as described above, when both of the spray fluids forming the swirling flows in opposite directions are a mixture of the spray liquid and the spray medium, these While the atomization of the spray particles is achieved by the collision of the swirling flow, the spray particles collide with each other as in the case where the intersection angle θ between the injection holes 41 and 42 is set to 180 ° as described above. Rather, spray particles having a large particle size may be formed, and the particle size distribution may be non-uniform. Therefore, in the case where the spray fluid is swirled in the opposite direction and sprayed, one of the spray fluids swirled in the opposite direction is a spray liquid that is atomized and sprayed, and the other is the spray liquid that is atomized and sprayed. It is desirable that the spray liquid is an atomizing medium for atomizing and spraying.

On the other hand, in the nozzle 11 of the above embodiment, the primary and secondary atomizers 1
3 and 14, small-diameter holes 25 forming a supply path of the spraying medium.
, 31,... And the grooves 26, 32, and the small diameter holes 27,..., And the grooves 28, which constitute the supply path of the spray liquid, are respectively formed around the axis O in a cross section orthogonal to the center axis O of the nozzle body 12. Are arranged on concentric circles A and B, respectively, and these supply paths are communicated with the concave grooves 30..., 34. An opening 33 is provided to form a swirling flow of each spray fluid. Therefore, according to the present embodiment, the spray fluid can be uniformly supplied from the supply path to the respective swirling chambers 29 and 33 over the entire circumference of the circles A and B via the swirling circuit. The swivel chamber 29,
It is possible to form the swirling flow of the spray fluid sprayed and sprayed from the nozzle 33 in a non-biased manner, and to further reliably atomize the spray particles, make the particle diameter distribution uniform, and stabilize the spray angle. Can be planned.

In the present embodiment, the small-diameter holes 25, 31, 27,... Having a circular cross section are arranged along the circles A, B to form a supply path. A supply path may be formed by forming a hole having an arcuate cross section along the circles A and B. In some cases, these supply paths are formed in an annular cross section along the circles A and B. Is also good. Further, the concave grooves 30 ..., 34 ... forming the above-described circuit.
Also, in the present embodiment, the center lines E and C are
Are formed so as to extend straight in the tangential direction of the circles D and F with the same width and depth along the center lines E and C, respectively. It is sufficient that the center lines E and C extend in the tangential direction of the circles D and F at the contact points with the D and F. In other words, the center lines E and C need not extend in the radial direction with respect to the axis O. The grooves 30 and 34 may be formed so as to be curved, or the groove width and the groove depth may be formed so as to gradually increase and decrease along the center lines E and C.

In this embodiment, the nozzle body 1
Reference numeral 2 denotes a primary atomizer 13 and a secondary atomizer 14, of which the secondary atomizer 14 is detachable from the primary atomizer 13 by removing the nozzle cap 15 as described above. Since the secondary atomizer 14 is formed with the concave groove 34 that defines a swirling circuit for rotating the spray medium in the supply path of the spray fluid, the secondary atomizer 14 is formed into a different shape, size, or It is possible to appropriately change the swirling flow of the spray medium in accordance with the conditions of use of the nozzle, etc., simply by replacing the number of spiral circuits with those having a concave groove that can be defined,
Therefore, the swirling flow of the spray fluid composed of the spray medium and the spray liquid can be easily changed to different ones. Therefore, for example, the spray angle can be set to a predetermined angle in a wider range, and a more versatile nozzle can be provided.

In the first embodiment, the nozzle body 12 is constituted by the primary atomizer 13 and the secondary atomizer 14 which is detachable from the primary atomizer. Like the nozzle 61 of the second embodiment of the present invention, the primary atomizer 14 also includes a holder 62 joined to the supply pipe 16 and a primary atomizer main body 63 detachable from the holder 62. Of the small diameter holes 25 forming the supply path of the spraying medium and the concave groove 26, and the small diameter holes 2 forming the supply path of the spray liquid.
7 and the concave groove 28 and the inner peripheral portion 2 of the primary atomizer 13
0 and a groove 3 forming a circuit for spraying liquid.
0 and the swirl chamber 29 may be formed in the primary atomizer main body 63. However, FIG.
In the second embodiment shown in FIG. 6 and the third embodiment shown in FIG. 6 described later, the same reference numerals are assigned to the same parts as those in the first embodiment, and the description will be omitted.

That is, the nozzle 6 of the second embodiment
1, the holder 62 has the same outer shape as the primary atomizer 13 of the first embodiment, and has a mounting hole 64 having a circular cross section centered on the axis O at the tip end side. The mounting hole 64 has an inner diameter smaller than the outer diameter of the secondary atomizer 14 and is larger than the outer diameter of the small-diameter hole 25 and the concave groove 26 from the axis O, and has a depth of The rear end portions 25a of the small diameter holes 25 extending toward the front end side from the concave groove 19 and the rear end of the inner peripheral portion 20 of the primary atomizer 13 are formed. The side part 20a is
The mounting hole 64 is opened at the bottom surface. On the bottom surface of the mounting hole 64, a concave groove 65 having a U-shaped cross section having a width slightly larger than the inner diameter of the small diameter hole 25 is formed along the circle A similarly to the concave groove 26. The rear end portions 25a of the small-diameter holes 25 are opened at the bottom surface of the mounting holes 64 through the concave grooves 65.

The primary atomizer main body 63 can be inserted into the mounting hole 64 of the holder 62 and can be inserted into the mounting hole 64.
Is formed in a substantially cylindrical shape with a bottom having a length equal to the depth of the inner peripheral portion of the inner peripheral portion 20 of the primary atomizer 13 and a bottom portion thereof. The small-diameter holes 27, the concave grooves 28, 30,... And the swirl chamber 2 so as to communicate with the distal end portion 20b of the peripheral portion 20.
9 are formed on the peripheral wall of the primary atomizer main body 63, and the remaining distal end portions 25b of the small-diameter holes 25 are formed.
And the concave groove 26 are formed along the circle A.
On the rear end surface of the peripheral wall portion of the primary atomizer main body 63, similarly to the concave groove 65, a concave groove 66 having a “U” -shaped cross section having a width slightly larger than the inner diameter of the small diameter hole 25 is formed. Are formed along the front end portion 25 of the small-diameter holes 25.
are opened at the rear end face of the primary atomizer main body 63 through the concave grooves 66.

In this embodiment, however, the primary atomizer body 63 is inserted into the mounting hole 64 of the holder 62 with the bottom of the primary atomizer facing the distal end, thereby forming the distal end portion 20b of the inner peripheral portion 20. And the rear end portion 20a are in communication with each other so that the spray liquid can be supplied to the front end side, and the front end portion 25b of the small diameter holes 25 and the rear end portion 25a. Thus, the spray medium can be supplied to the distal end side, and a primary atomizer 13 similar to the first embodiment is configured. Next, the primary atomizer 13
The secondary atomizer 14 is attached to the tip of the nozzle body 12 to form the nozzle body 12, and the nozzle cap 15 is attached to the tip of the nozzle body 12 to form the nozzle 61 of the second embodiment. .

However, in the nozzle 61 of the present embodiment configured as described above, the primary atomizer 13 includes the holder 62 and the primary atomizer main body 63, and the primary atomizer main body 63 is The nozzle cap 1 is merely inserted into the mounting hole 64,
The fifth and second atomizers 14 are detachable from the nozzle body 12 by removing them, while the small-diameter holes 27 forming the supply path of the spray liquid, the grooves 28 and the grooves 30 forming the swirling circuit are provided. The distal end portions 25b of the small-diameter holes 25 that are a part of the supply path of the spray medium are formed in the detachable primary atomizer main body 63. Is supplied, and the secondary atomizer main body 63 is damaged, the original performance can be easily recovered by replacing the secondary atomizer main body 63. Further, by replacing the secondary atomizer body 63 with, for example, one having a different shape, size, or number of grooves 30 as a spiral circuit of the spray liquid, the swirling flow of the spray liquid is also changed to the use condition of the nozzle. It can be changed appropriately according to
In addition to the fact that the next atomizer 14 is detachable, the present embodiment also provides an advantage that a more versatile nozzle can be provided.

When the supply pipe 16 for the spray medium and the spray liquid has a double pipe structure as in the first and second embodiments, the space between the spray medium and the spray liquid is provided. If there is a temperature difference, heat is transferred between the two via the inner pipe 17 before being supplied to the nozzle body 12. However, for example, when the spray liquid is a liquid containing alcohol and the boiling point is low, if the temperature of the spray medium is higher than this and the temperature difference is large,
When the spray liquid is heated before it is supplied to the nozzle body 12, it boils and generates bubbles, which makes it impossible to continuously spray the spray liquid, which is called a so-called vapor lock. Therefore, smooth spraying may be hindered. Also, for example, when the spray liquid is a bottom oil or the like generated at the time of petroleum refining and the viscosity greatly changes depending on the temperature, the fluctuation of the viscosity of the spray fluid is large when the temperature difference with the spray medium is large, In some cases, the spray liquid may be clogged.

In such a case, as shown in FIG. 6, a supply pipe 72 for supplying a spray liquid and a supply pipe 7 for supplying a spray medium, like a nozzle 71 of a third embodiment of the present invention.
It is desirable that the supply pipes 72 and 73 can be connected to the nozzle body 12 with an interval between them as independent pipes with an interval between them. Here, in the third embodiment, the primary atomizer 13 of the nozzle body 12 is exactly the same as the mounting hole 6 of the second embodiment.
4 are divided into a front end portion 74 and a rear end portion 75 by a plane orthogonal to the axis O at the bottom surface position, and the rear end surface of the front end portion 74 and the front end surface of the rear end portion 75 are joined together. In this case, the front end portion 74 is provided with the small-diameter hole 25 in its rear end surface.
The primary atomizer 13 of the first embodiment has a more distal end than the flat surface except that a concave groove 76 having a cross section “U” shape having a width slightly larger than the inner diameter of the primary atomizer 13 is formed along the circle A. It has substantially the same configuration as the side part.

On the other hand, the rear end 7 of the primary atomizer 13
5, a concave groove 77 having a “U” cross section having the same width as the concave groove 76 is formed along the circle A on the distal end surface, and a distal end portion 74 is formed at the center of the distal end surface. A supply hole 78 having the same inner diameter as the inner peripheral portion 20 of the primary atomizer 13 on the side is opened about the axis O. A rear end face of the rear end portion 75 is provided on one side (lower side in FIG. 6) with respect to the axis O with the supply pipe 7 for the spray liquid.
2 is attached, and on the other side (upper side in FIG. 6) opposite to the attachment portion 79 across the axis O, the supply pipe 73 for the spray medium is attached. Recessed mounting portions 80 are formed at intervals in the radial direction with respect to the axis O, and the supply pipes 72 and 73 are fitted into these mounting portions 79 and 80, respectively, and then joined. As a result, it is attached to the rear end 75 of the primary atomizer 13. Further, the mounting portion 80 is connected to the groove 77 through a large-diameter concave hole 81 and a small-diameter communication hole 82 parallel to the axis O, and the mounting portion 79
Are oblique holes 83 formed obliquely with respect to the axis O so as to avoid these concave holes 81, communication holes 82 and concave grooves 77.
Through the supply holes 78 respectively.

Therefore, according to the nozzle 71 of the third embodiment configured as described above, the supply pipe 72 for the spray liquid and the supply pipe 73 for the spray medium are spaced from each other, and Since the connection is possible, even if the temperature difference between the two spray fluids is large, no heat transfer occurs until the spray fluid is supplied to the nozzle body 12, so that even if the boiling point of the spray liquid is low. In addition to preventing the occurrence of vapor lock, it is also possible to prevent a situation in which the viscosity of the spray liquid fluctuates, thereby facilitating smooth spraying. In the present embodiment, the primary atomizer 13 is formed by joining the front end portion 74 to the rear end portion 75. For example, the primary atomizer 13 is detachable by screwing with a male and female screw portion or the second atomizer. If the holder 62 of this embodiment has the same configuration as that of the rear end portion 75 and the supply pipes 72 and 73 can be connected to each other with an interval therebetween, the same effect as that of the second embodiment can be obtained. .

[0050]

As described above, according to the present invention,
By colliding the spray fluids sprayed from at least a pair of spray holes formed in the nozzle cap attached to the tip of the nozzle body, the spray particles can be made finer by the impact, and the particle diameter is large. The generation of particles can be prevented, and the particle size distribution can be made uniform, and the spray angle of the spray fluid can be easily and stably controlled according to the angle of the injection hole. In particular, by setting the crossing angle of the extension of the center line of the pair of injection holes to be in the range of 5 ° to 50 °, it is possible to generate spray particles having a large particle diameter while promoting reliable collision of the spray particles. In addition, by opening the pair of injection holes on the first and second tapered surfaces where the taper angle is reduced toward the inner peripheral side of the tip end of the nozzle cap, this opening is formed. It is possible to prevent the spray angle from being different depending on the peripheral edge position, and it is possible to control the spray angle more reliably and to make the spray particles finer.

On the other hand, in the nozzle body, first, the spray liquid and the spray medium are respectively swirled and sprayed, and second, the spray fluid is swirled in the opposite directions to spray. The particles can be dispersed to make the particle size even more reliable and the particle size distribution can be made uniform, and the spray angle can be more easily and stably controlled to a predetermined angle. In particular,
It is more effective if the spray liquid and the spray medium are swirled in opposite directions.

Further, the supply path for supplying these spray fluids is arranged on a concentric circle centering on the axis of the nozzle body, and is connected to a swirling circuit at the tip side of the nozzle body so as to swirl the spray fluid. If so, it is possible to form a swirling flow without bias, and it is possible to more reliably exert the above effects,
If this circuit is formed in a member that can be attached to and detached from the nozzle body, a more versatile nozzle can be provided, and even if corrosion or wear occurs, the original performance can be improved by replacing this member. It can be easily recovered. Furthermore, the supply pipes for supplying the plurality of spray fluids are separately provided so that they can be connected to the nozzle body while being spaced apart from each other, so that even if there is a temperature difference between these spray fluids, smooth spray can be performed. Can be planned. Therefore, according to the waste liquid combustion apparatus of the present invention provided with such a nozzle, the waste liquid can be efficiently sprayed and burned, and the processing can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a nozzle 11 according to a first embodiment of the present invention.

FIG. 2 is a front view of the nozzle 11 of the embodiment shown in FIG.

FIG. 3 is a ZOZ sectional view in FIG.

FIG. 4 is a partially cutaway side view showing an embodiment of the waste liquid combustion apparatus of the present invention including the nozzle 11 of the embodiment shown in FIG.

FIG. 5 is a sectional view of a nozzle 61 according to a second embodiment of the present invention.

FIG. 6 is a sectional view of a nozzle 71 according to a third embodiment of the present invention.

FIG. 7 is a sectional view showing a nozzle 1 of a conventional waste liquid combustion device.

[Explanation of symbols]

11, 61, 71 Nozzle 12 Nozzle body 13 Primary atomizer 14 Secondary atomizer (a member detachably attached to the nozzle body) 15 Nozzle cap 16, 72, 73 Spray fluid supply pipe 25, 27, 31 Small diameter hole (Spray Fluid supply path) 26, 28, 32, 65, 66, 77, 76 Groove (spray fluid supply path) 29, 33 Swirling chamber 30, 34 Groove (rotating circuit) 37 First tapered surface 38 Second Injection hole O Central axis A, B of nozzle body 12 Concentric circle in which supply path of spray fluid is disposed θ Intersection angle of injection holes 41, 42

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideaki Yamazaki 2--17-15 Tsukushima Machine, Chuo-ku, Tokyo Inside Tsukishima Machinery Co., Ltd. (72) Inventor Michihiro Ueda 2-17-15 Tsukuda, Chuo-ku, Tokyo Tsukishima Machinery Co., Ltd. F-term (reference) 4F033 AA13 BA03 CA13 DA01 EA05 GA10 KA03 NA01

Claims (11)

[Claims] A nozzle cap is attached to a tip of a nozzle body from which a spray fluid is sprayed from a tip, and the nozzle cap has at least a pair of sprays for spraying the spray fluid sprayed from the nozzle body. Holes are respectively formed on the inner peripheral side and the outer peripheral side of the tip of the nozzle cap, and the pair of injection holes are each inclined toward the outer peripheral side toward the distal end side,
A nozzle characterized in that extensions of the center lines of the nozzle caps to each other are crossed at the front end of the nozzle cap. 2. The nozzle according to claim 1, wherein an intersection angle of an extension of a center line of the pair of injection holes is set in a range of 5 ° to 50 °. 3. A front end surface of the nozzle cap includes a first tapered surface which is directed toward the inner peripheral side toward the distal end, and a first tapered surface which is located on the inner peripheral side of the first tapered surface. And a second tapered surface directed toward the distal end with a smaller taper angle than that of the pair of the injection holes, the outer one of the pair of injection holes is the first tapered surface, and the inner one is the above-described one. Second
The nozzle according to claim 1, wherein the nozzle is opened on a tapered surface of the nozzle. 4. A plurality of nozzle bodies each having a supply path for supplying a spray liquid to be atomized and sprayed, and a supply path for supplying a spray medium for atomizing and spraying the spray liquid. 4. A supply path of the spray fluid is formed, and these supply paths are capable of spraying by turning the spray liquid and the spray medium respectively. Nozzle as described. 5. The nozzle according to claim 1, wherein a plurality of supply paths for spraying the spray fluid by turning the spray fluid in opposite directions are formed in the nozzle body. . 6. The spray fluid, which is swirled in opposite directions, is a spray liquid that is atomized and sprayed, and a spray medium that atomizes the spray liquid and sprays the spray liquid. Item 6. The nozzle according to item 5. 7. The nozzle body is provided with the plurality of supply paths on a plurality of concentric circles centered on the axis in a cross section orthogonal to the central axis of the nozzle body. 5. The nozzle according to claim 4, wherein the tip end of the nozzle body is communicated with a swirling circuit extending in a tangential direction of a circle centered on the axis, and is opened to a swirling chamber formed on the axis. The nozzle according to claim 6. 8. The nozzle according to claim 7, wherein at least a part of the circuit of at least a part of the plurality of supply paths is formed in a member detachable from the nozzle body. The nozzle according to any one of the above. 9. The nozzle according to claim 8, wherein the swirling portions of the plurality of supply paths are formed on members detachable from the nozzle main body, respectively. 10. The nozzle body, wherein a plurality of spray fluid supply pipes respectively communicating with the plurality of supply passages can be connected to each other at intervals. 10. The nozzle according to any one of 9 above. 11. A waste liquid combustion apparatus provided with the nozzle according to claim 1, wherein a waste liquid is supplied as a spray fluid to a part of the plurality of supply paths. Waste liquid combustion equipment.