JPS58184411A - Fuel atomizer - Google Patents

Abstract

PURPOSE:To improve combustion efficiency and to make it endurable to a long use, by constituting a device such that fuel in a fuel mixing passage is jetted to a downstream side in a manner to cover it with an atomizing medium through a fuel pipe. CONSTITUTION:Fuel is jetted through a fuel passage 26 in a fuel pipe 24 from a fuel staying part 23 to a fuel atomizing medium mixing passage 25. Meanwhile, an atomizing medium is jetted and supplied to a fuel-atomizing medium mixing passage 25 through an atomizing medium passage 22 from an atomizing medium distributing passage 21. Fuel jetted through a fuel pipe 24 under such working condition is atomized as it collides and is mixed and agitated with an atomizing medium in a manner to cover it with the atomizing medium flowing along the fuel pipe 24 from the periphery of said fuel pipe 24, and is jetted into a fire furnace through the mixing passage 25. This remarkably reduces abrasion of a wall of a fuel-atomizing medium mixing passage 25 in an atomizer, and permits the steady atomization of fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a two-fluid fuel-injected rice atomizer that sprays rice.

A two-fluid spray atomizer that has been commonly used in the past has a cylindrical atomizer body 01 whose front cross section is trapezoidal, as shown in FIG. 1, which is a vertical cross-sectional view.
On this main body layer side, there is a spray medium distribution passage 02 and a fuel reservoir 0.
4, and a spray medium passage 03 and a fuel mixing passage 05 that communicate with each other are formed inside the main body, and fuel is injected by the spray medium.

2 and 3 are front and rear views of the atomizer 01, showing the openings of a plurality of spaced apart atomizing medium passages 03 and fuel mixing passages o5. Also, the dashed lines and solid lines indicate the flow of the atomizing medium and fuel, respectively.

In the atomizer with the above structure, the fuel is stored in the fuel reservoir 04
The fuel is then distributed and supplied to a plurality of fuel mixing passages o5. The atomizing medium (e.g. steam) must be in the atomizing medium distribution passage 0.
2 to the same number of spray medium passages 03 as the fuel mixing passages o5, and is ejected to the fuel mixing passages 05, where it collides with the fuel, mixes, and stirs.

At this time, the fuel is atomized by the energy of the injection wheel medium and injected into the furnace from the fuel mixing passage 05.

In this type of two-fluid spray atomizer, the fuel is atomized by the energy of the spray medium, so the energy of the spray medium is generally large. and opposite fuel mixing passage 0
5 Pushed against the wall.

Therefore, as shown in FIG. 4, the fuel supplied to the fuel mixing passage 05 flows as if it were pressed against the inner wall of the fuel mixing passage 05 by the flow of the atomizing medium shown by the broken line as shown by the actual arrow.

When the above two-fluid spray atomizer is applied to slurry liquid fuel, there are the following drawbacks.

Since the slurry-like liquid fuel contains solid particles, when the fuel flows while being pressed against the wall surface of the fuel mixing passage 05, the solid particles that have already been atomized and separated are transferred to the fuel mixing passage 05 along with the high-speed flow of the spray medium. Print on the wall]
Due to the flow, the inner wall of the fuel mixing passage 05 wears out (as shown in FIG. This affects the flow rate characteristics and makes it impossible to function as an atomizer.Therefore, there was a problem that required the atomizer to be replaced in a short period of time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fuel injection atomizer that eliminates the above-mentioned drawbacks, has good combustion efficiency, and can be used for a long time.

To achieve this object, the present invention provides a plurality of fuel mixing passages that open into an internal fuel reservoir and are spaced apart from each other in concentric fields at the front end surface, and each of the fuel mixing passages The fuel blowing atomizer is provided with a plurality of atomizing medium passages communicating with each other, and is coaxially inserted from the fuel reservoir opening end to the downstream side of the intersection of the fuel mixing passage and the atomizing medium passage. A fuel pipe is arranged between the fuel pipe and the mixing passage to define a space through which the fuel fluid flows. Therefore, according to the present invention, the fuel in the fuel mixing passage is sprayed downstream by the fuel pipe so as to be surrounded by the atomizing medium, so that the fuel in the fuel mixing passage is not pressed against the wall of the fuel mixing passage as in the past. Wall wear is reduced.

The spray atomizer according to the present invention can be applied to a burner tip of a fuel spray atomizer.

The invention for improving the drawbacks of the conventional one will be described below with reference to the drawings, with reference to embodiments shown in FIGS. 6 to 8.

The fuel spray atomizer of the present invention has the same structure as the conventional one, 20 is the atomizer body, 21 is a spray medium mixing passage, 22 is a spray medium passage, 23 is a fuel reservoir, 24 is a fuel pipe, and 25 is a fuel Spray medium mixing passage, 26 is fuel pipe 2
．． 4 is a fuel passage formed within the fuel passage. Further, the broken line arrows indicate the spray medium flow, and the solid line arrows indicate the fuel flow.

In the atomizer with the above structure, the fuel is stored in the fuel reservoir 2.
3, the fuel is injected through the fuel passage 26 of the fuel pipe 24 into the fuel atomizing medium mixing passage 25. On the other hand, the atomizing medium is injected and supplied from the atomizing medium distribution passage 21 to the fuel-atomizing medium mixing passage 25 through the atomizing medium passage 22 .

Under such operating conditions, the fuel injected from the fuel pipe 24 collides with the atomizing medium in such a manner that it is surrounded by the atomizing medium that flows cleanly into the fuel pipe 24 from around the fuel pipe 24;
The mixture is atomized while being mixed and stirred, and is injected into the furnace through the mixing passage 25.

FIG. 8 shows the above injection situation in detail.

In FIG. 8, the part numbers are the same as in FIGS. 6 and 7.

As can be seen from the streamlines of the fuel and atomizing medium in FIG. 8, both the fuel and the atomizing medium flow straight through the fuel-atomizing medium mixing passage 25.
The fuel will not collide with the wall of the Further, since the fuel jet flows through the fuel pipe 24 and is mixed and stirred in a state where it is surrounded by the atomizing medium, the state in which solid particles in the fuel slide on the wall of the mixing passage 25 is reduced.

The above atomizer structure and operation have the following effects.

a. The abrasion of the wall of the fuel-spray medium mixing passage 25 of the atomizer is extremely reduced, allowing for stable fuel spray.

(b) Since the fuel is injected from the fuel pipe 24 alone, even if the fuel-spray medium mixing passage is slightly distorted, it will not be affected and the flow rate characteristics will be stable.

It goes without saying that in the embodiment of the atomizer, the length of the fuel pipe 24 needs to be extended downstream from the position of the atomizing medium supply port.

[Brief explanation of the drawing]

1 to 3 show the main parts of a conventional two-fluid spray atomizer, and FIG. 1 shows the i-+&! of FIG. 3. FIGS. 2 and 3 are longitudinal cross-sectional views taken along the lines ■-■ and l-1 in FIG. 1, respectively. FIGS. FIG. 6 is a longitudinal sectional view of the two-fluid atomizer according to the present invention; FIG.
The figure is a view taken along the line ■-■ in FIG. 6, and FIG. 8 is a partial cross-sectional view showing the spraying state of the spray medium. 01... Atomizer body, 0.2... Spraying medium...
,,,,Jl Distribution path, 03... Spray medium path, 04... Fuel reservoir, 0
5. Fuel heating passage, 20. Atomizer non-operation, 21. Spray medium distribution passage,
22: Spray medium passage, 23: Fuel reservoir, 24: Fuel pipe, 25: Fuel/spray medium mixing passage, 26: Fuel passage. ,1

Claims (1)

[Claims] A fuel sprayer comprising a plurality of fuel mixing passages opening from an internal fuel reservoir and opening concentrically at a distance from each other on the front end face, and a plurality of atomizing medium passages communicating with each of the fuel mixing passages. In the atomizer, the atomizer is inserted coaxially with the mixing passageway from the opening end of the fuel reservoir to the downstream side of the mixing passageway from the intersection of the fuel mixing passageway and the spraying medium passageway, and a spraying medium is inserted between the mixing passageway and the mixing passageway. A fuel spray atomizer characterized in that a fuel pipe is arranged so as to form a space through which fuel flows.