JP2559333Y2 - Slurry fuel atomizer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying device for atomizing and burning a slurry fuel represented by coal, water and a mixture (hereinafter referred to as CWM).

[0002]

2. Description of the Related Art An atomizer body is detachably attached to a tip end of a supply conductor having a first passage which is a passage for a slurry fuel and a second passage which is a passage for an atomizing gas outside the first passage. The connected slurry-type fuel spraying device is Japanese Patent Publication No. 1-418.
It is publicly known as shown in JP-A-91.

[0003]

However, in the above-mentioned known spraying device, since the steam guide and the axis are formed separately, the attachment of the atomizer body to the supply conductor is troublesome and the annular slit is formed. In some cases, the slurry-like fuel and the gas ejected in the form of an annular liquid film are not sufficiently mixed with each other and are ejected from the fuel ejection port.

[0004] Further, since the axis and the steam cap come into contact with the slurry-like fuel, there is a possibility that these parts may be worn.

The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to integrally form a slurry-like fuel passage and a gas passage in an axis. It is an object of the present invention to provide a slurry-type fuel spray device excellent in assemblability and atomization of fuel by providing a mixing chamber of slurry-like fuel and gas upstream of a fuel jet port.

Another object of the present invention is to provide an excellent apparatus for spraying a slurry-like fuel in which the slurry-like fuel is effectively jetted in the form of an annular liquid film to further promote atomization of the fuel by collision with gas. is there.

Further, a target, an axis and a steam cap are formed of a new ceramic to prevent wear of these parts by the slurry fuel, and a durable and reliable slurry fuel spray apparatus is provided. It is something to offer.

[0008]

In order to achieve the above-mentioned object, the present invention provides a slurry-type fuel spraying device which communicates an atomizer body with a first passage and converts the slurry-like fuel into an annular liquid film. An axis having an annular slit to be ejected, a tip for fixing a target forming an inner surface of the fuel ejection port, and a communication hole communicating with a second passage; and an annular member cooperating with an outlet of the communication hole. A gas outlet directed to a slit end side, an opening forming an outer surface of the fuel outlet in cooperation with the target, and a mixing chamber formed between the gas outlet and the fuel outlet. A steam cap, a fixing ring disposed at a rear end of the axis, and the target.

[0009] A projection is formed at the tip of the annular slit of the axis.

[0010] Further, at least the axis, the steam cap and the target are molded from a new ceramic,
A stop bolt for fixing the target is passed through the axis and fastened to a rear end of the axis by a stop nut, and the atomizer body is fixed to the supply conductor with a metal cap. Things.

[0011]

Since the slurry-type fuel spray device is constructed as described above, the CWM is guided from the fuel passage to the annular slit and is ejected as an annular liquid film. The fuel is atomized by separation and separation from the liquid film, and further mixing is performed in the mixing chamber to further atomize the fuel, and then along the taped target. By spreading the liquid film, the contact area with the atomizing gas is increased to further promote the atomization, and the fuel is sprayed from the fuel outlet of the annular slit while promoting the layer atomization.

Since the slurry-like fuel passage and the gas passage are integrally formed in the axis, attachment of the atomizer body to the supply conductor can be extremely easily performed.

Further, when a projection is formed at the tip of the annular slit of the axis, the CWM from the annular slit is more effectively ejected in the form of an annular liquid film, and the atomization of fuel due to collision with gas is further promoted. Is done.

Further, an axis, a steam cap, and a tar
The target is formed from new ceramic, a fixing bolt for fixing the target is passed through the axis, and is fixed to a rear end of the axis with a fixing nut, and the atomizer body is supplied with a metal cap. When adhered to the conductor, the component fuel is less worn by the slurry fuel, there is no seizure of the target on the bolt, and the new ceramic component is mounted in the compression direction on the supply conductor side.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a CWM supply system applied to the CWM spraying device according to the present invention, which includes a CWM tank A, a CWM pumping device B such as a pump, and a strainer C.
, A flow meter D, and an atomizer E for spraying CWM.

FIG. 2 shows an atomizer according to one embodiment of the present invention. This atomizer body E is
It comprises a get 1, a steam cap 2, an axis 3, a fixing ring 4, and a cap 5.

At least the target 1, the steam cap 2 and the axis 3 are made of new ceramic, and the cap 5 is made of ordinary metal.

The Axis 3 shuts off an annular slit 8 communicating with the first passage 7 of the supply conductor 6 and ejecting CWM in an annular liquid film form, and the target 1 forming an inner surface of the fuel outlet 9. And a plurality of communication holes 12 (see FIG. 3) communicating with the second passage 11, which is a vapor passage of the supply conductor 6, via the fixing ring 4. A through hole 14 is formed in the distal end portion 10 so as to pass through a fixing bolt 13 for fixing the target 1.

A projecting portion 15 projecting over the entire circumference is formed at the front end of the annular slit 8, and the rear end of the annular slit 8 becomes a flow dividing chamber 17 by a plurality of support walls 16. ing.

The target 1 is formed in a conical shape,
It is fixed to the tip 10 of the axis 3 and is fixed by the fixing bolt 13. And
The stop bolt 13 passes through the through hole 14 and is fastened to the rear end of the axis 3 by a stop nut 19 via a spring washer 18. By this tightening, the target 1 is securely held by the axis 3 and the fixing bolt 13.

The steam cap 2 communicates with a communication hole 12 of the axis 3 and has an annular steam outlet 20 directed to the annular slit 8 end side projection 15 between the communication hole 12 and the outlet of the communication hole 12. A wrapper forming a mixing chamber 21 between the steam outlet 20 and the fuel outlet 9, and forming an outer surface of the fuel outlet 9 at the tip end in cooperation with the target 1. An opening surface 22 is formed.

A screw 2 is provided on the inner periphery of the cap 5 on the opening side.
The fixing ring 4 screwed into the screw 23 is inserted. A screw 24 is screwed into the screw 23 on the outer periphery of the supply conductor 6.

As shown in FIG. 4, the fixing ring 4 has a CWM passage 25 at the center and a plurality of long holes 26 outside the passage, and a screw 27 screwed to the screw 23 is engraved on the outer periphery. . Therefore, at the end of the assembly, one long hole 26 communicates with the plurality of communication holes 12 of the axis 3. As a result, the steam is supplied to all the communication holes 12 almost uniformly.

In order to assemble the atomizer body E to the supply conductor 6, first, the packing 28, the steam cap 2, the packing 29, the axis 3, and the packing 30 are placed in the cap 5.
These are inserted in this order, and the fixing ring 4 is screwed in to temporarily fix the steam cap 2 and the axis 3.

Next, the target 1 is disposed at the tip 10 of the axis 3, and the target 1 is fixed with the head of a locking bolt 13.
The stop bolt 13 is inserted into the through hole 14 of the Axis 3 so as to press the lock nut 13, and the end of the stop bolt 13 is connected to the rear end of the Axis 3 via a lock washer 18 via a lock nut 19.
To tighten.

Thus, the target 1, the steam cap 2, the axis 3 and the fixing ring 4 are attached to the cap 5.
In the state in which is held, the cap 5 is screwed into the supply conductor 6 and tightened, whereby the assembly of the atomizer body is completed.

In this assembled state, the target 1, the steam cap 2 and the axis 3 made of a new ceramic are fixed in the compression direction.

The angle of inclination of the annular steam outlet 20 is suitably in the range of 30 ° to 60 °.
The clearance between the trumpet-like opening surface 22 of the steam cap 2 and the target 1 is 1.0 to 3.0 in order to prevent clogging by fine coal particles and to perform appropriate atomization.
The range of mm is appropriate.

In the apparatus having the above configuration,
The CWM in the CWM tank A is sent to an atomizer E for spraying CWM via a strainer C and a flow meter D by a CWM pumping device B such as a pump, and is atomized, sprayed to a furnace F and burned. You.

The CWM having passed through the flow meter D is supplied to the supply conductor 6.
The liquid is ejected from the annular slit 8 through the first passage 7 as an annular liquid film. At this time, since the projection 15 is formed at the tip of the annular slit 8, C flowing through the central portion is formed.
The WM is guided on the outer periphery, so that an annular liquid film is reliably formed. The one-way atomizing vapor passes through the second passage 11, the long hole 26, and the communication hole 11 to form an annular airflow from the annular steam jet 20 and collides with the liquid film of the CWM. The fuel is atomized by exfoliation and splitting, and then the two are mixed in the mixing chamber 21 to further atomize the fuel, and further spread along the taped target 1 to form a fuel with the atomizing steam. The atomization is further promoted by increasing the contact area, and the fuel is sprayed from the fuel outlet 9 of the annular slit into the furnace F while the atomization is promoted.

In the above embodiment, the case where steam is used as the atomizing gas has been described, but air or the like may be used as the gas.

[0032]

Since the present invention has the above-described structure, the CWM is guided from the fuel passage to the annular slit and is ejected as an annular liquid film, and the atomizing gas is caused to collide with the annular liquid film as an annular gas flow. The fuel is atomized by splitting and splitting from the liquid film, and the fuel is further atomized by mixing the two in the mixing chamber, and then the liquid film is formed along the taped target. By expanding the contact area with the atomizing gas, the atomization is further promoted, and the fuel is sprayed from the fuel outlet of the annular slit while promoting the atomization. Atomization is completely performed, and if this is applied to a combustion atomizer, ignition is stable, combustion efficiency is high, and fuel cost is reduced.

Since the slurry-like fuel passage and the gas passage are formed integrally in the axis, the attachment of the atomizer body to the supply conductor can be extremely easily performed, so that the maintenance, inspection, and replacement of the atomizer body are performed. And so on.

When a projection is formed at the tip of the annular slit, the CWM flowing through the central portion is guided to the outer periphery to reliably form an annular liquid film. As a result, atomization of fuel is further promoted, and as a result, when applied to the combustion atomizer, ignition is more stabilized, combustion efficiency is increased, and fuel cost is further reduced.

Further, Axis, steam cap and tar
The target and the target were molded from new ceramics, and a fixing bolt for fixing the target was passed through the axis and fixed to the rear end of the axis with a fixing nut, and the atomizer body was fixed to the supply conductor with a metal cap. In case, slurry
Parts that are exposed to high temperatures with little wear of parts due to fuel
Since the get is not directly fixed by screws,
There is no seizure of the get on the bolt, and the new ceramic component is mounted in a compressive direction to the supply conductor, so that the mounting is reliable in terms of strength.

[Brief description of the drawings]

FIG. 1 is a supply system diagram of CWM using a spray device according to the present invention.

FIG. 2 is a sectional view of the atomizer according to the present invention.

FIG. 3 is a rear view of the axis according to the present invention.

FIG. 4 is a rear view of the fixing ring according to the present invention.

[Explanation of symbols]

 E Atomizer body 1 Target 2 Steam cap 3 Axis 4 Fixing ring 5 Cap 6 Supply conductor 7 First passage 8 Annular slit 9 Fuel outlet 10 Axis tip 11 Second passage 12 Communication hole 13 Stop bolt 14 Penetration Hole 15 Protrusion 19 Lock nut 20 Gas outlet 21 Mixing chamber 22 Opening surface

Continuing on the front page (72) Inventor Seimei Igawa 1-33 Dojimahama, Kita-ku, Osaka-shi, Japan Takuma Corporation (72) Inventor Yasuo Shimizu 1-3-23 Dojimahama, Kita-ku, Osaka-shi, Japan Takuma Corporation

Claims (3)

(57) [Scope of request for utility model registration] 1. An atomizer body is detachably attached to a tip of a supply conductor having a first passage which is a passage for a slurry-like fuel and a second passage which is a passage for an atomizing gas outside the first passage. In the connected slurry-type fuel spray device, an atomizer body communicates with the first passage to form an annular slit for discharging the slurry-like fuel into an annular liquid film and a target forming an inner surface of a fuel injection port. An axis having a distal end to be fixed and a communication hole communicating with the second passage, a gas outlet directed to the annular slit end side in cooperation with an outlet of the communication hole, and the target; A steam cap having an opening surface cooperating to form an outer surface of the fuel outlet and a mixing chamber formed between the gas outlet and the fuel outlet;
A slurry, comprising: a fixing ring disposed at a rear end of the axis; and the target.
Fuel spray device. 2. A slurry fuel spraying device according to claim 1, wherein a projection is formed at a tip end of said annular slit of said axis. 3. At least the axis, the steam cap, and the target are formed of a new ceramic, and a fixing bolt for fixing the target is passed through the axis, and a fixing nut is provided at a rear end of the axis. The slurry-type fuel spray device according to claim 1 or 2, wherein the atomizer body is fixed and the atomizer body is fixed to the supply conductor by a metal cap.