JPH0611111A - Liquid fuel evaporator - Google Patents

Abstract

PURPOSE:To provide a liquid fuel evaporator capable of bringing high- temperature air whose temperature is not lowered into contact with atomized fuel effectively, thereby evaporating and vaporizing the atomized fuel efficiently and achieving the miniaturization of an evaporation container. CONSTITUTION:A liquid fuel evaporator is so designed that liquid fuel is directly evaporated and vaporized by atomizing the liquid fuel and feeding it into heated air. A stepped distribution means 17 adapted to distribute supplied high- temperature air to two or more places in steps is provided in an evaporation container 11 which brings the atomized fuel into contact with the high- temperature air to vaporize the same.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel vaporization apparatus for atomizing a liquid fuel such as petroleum and supplying it to vaporize it for combustion.

[0002]

2. Description of the Related Art A conventional example of this type of liquid fuel evaporation apparatus is shown in FIG. The evaporation container 1 comprises a cylindrical portion 2 and a conical portion 3,
The evaporation chamber 4 is configured. A liquid fuel jet nozzle 5 faces the inside of the evaporation chamber 4 near the center axis of the evaporation container 1. The liquid fuel is sent to the ejection nozzle 5 via the nozzle adapter 6 and introduced into the evaporation chamber 4 in the atomized state. The evaporation container 1 is provided with a high temperature air inlet 7, and the high temperature air heated by the air heating device 10 directly vaporizes the liquid fuel sprayed into the evaporation chamber 4 at a relatively low temperature. The fuel vaporized in the evaporation container 1 is sent from the outlet 8 to the combustion section 9 and is used for combustion.

[0003]

In the above conventional apparatus, since the spray and the hot air flow in the same direction, the residence time in the container 1 tends to be short, and the temperature of the hot air around the spray is lowered by the latent heat of vaporization. In addition to being easily invited, there is a drawback that the sprayed particles easily collide with the wall surface. Therefore, it is necessary to set the air temperature higher or set the evaporation container volume larger.

Therefore, the present invention eliminates the drawbacks of the conventional device described above, and allows high-temperature air whose temperature is not lowered to be effectively brought into contact with the atomized fuel, so that vaporization can be efficiently performed. An object of the present invention is to provide a liquid fuel vaporization device capable of reducing the size of a container.

[0005]

In order to achieve the above object, the liquid fuel vaporization device of the present invention atomizes the liquid fuel into heated air and supplies it to vaporize the liquid fuel directly. In the liquid fuel evaporation apparatus configured as described above, a stepwise distribution means for stepwise distributing the supplied high temperature air to two or more places is provided in the evaporation container for contact vaporizing the spray fuel and the high temperature air. It has a feature.

[0006]

According to the above-mentioned feature of the present invention, the high-temperature air whose temperature is not lowered by the stepwise distribution means is stored in the evaporation container.
It can be supplied to more than one place and can be brought into contact with the atomized particles being vaporized in stages, and the vaporization can be performed efficiently and stably.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a partially sectional front view showing an embodiment of the device of the present invention.

The evaporation container 11 comprises a cylindrical portion 12 and a conical portion 13 and forms an evaporation chamber 14 inside. The shape of the evaporation container 11 can be a sphere, an ellipsoid, or a shape similar thereto. With such a shape, transient characteristics can be improved. A liquid fuel jet nozzle 15 faces the inside of the evaporation chamber 14 near the central axis of the evaporation container 11.
Liquid fuel jets through nozzle adapter 16 Nozzle 15
And is introduced into the evaporation chamber 14 in the atomized state. The evaporation container 11 is provided with a stepwise distribution means 17 for stepwise distributing the supplied high temperature air to two or more places. The stepwise distribution means 17 has a cone shape, and a small-diameter opening at the base end thereof opens as a high temperature air primary introduction port 19 around the ejection port of the ejection nozzle 15. Also, the entire circumference of the large diameter portion of the tip and the cylindrical portion 12
The gap with the inner wall is the high temperature air secondary introduction port 20.

The high-temperature air heated by the air heating device 21 is introduced from the high-temperature air inlet 18 and further introduced into the evaporation chamber 14 from the high-temperature primary inlet 19 and the high-temperature secondary inlet 20. . The fuel sprayed into the evaporation chamber 14 first comes into contact with the hot air from the high temperature air primary inlet 19, and the sprayed fuel is introduced from the high temperature air secondary inlet 20 where it has spread to the periphery of the evaporation chamber 14. Contacted with hot air. The temperature of the high temperature air introduced from the primary inlet 19 and the secondary inlet 20 has not yet dropped, and the atomized fuel can be efficiently vaporized in two steps. The fuel directly vaporized by the high temperature air in the evaporation chamber 14 at a relatively low temperature is sent from the outlet 22 to the combustion section 23 and is used for combustion. Further, the air heating device 21, the air introduction path 24, and the high temperature air introduction port 18 constitute high temperature air feeding means.

In the above embodiment, the high temperature air secondary inlet is used.
Although 20 is shown to be composed of a gap, it may be a hole. Further, the shape, type, and mounting position of the combustion unit and the nozzle as the spraying device are not particularly limited.

FIG. 2 is a partially sectional front view showing another embodiment of the device of the present invention. In this embodiment, the stepwise dispensing means 17
A hole is provided at an intermediate position to form the high temperature air intermediate introduction port 25. This makes it possible to bring the high-temperature air, which has not decreased in temperature, into contact with the fuel spray particles in a stepwise manner, and to perform the contact vaporization more efficiently. Other configurations are shown in FIG.
It is the same as the example shown in.

[0012]

According to the liquid fuel vaporization device of the present invention, the high temperature air supplied to the vaporization vessel for contact vaporizing the spray fuel and the high temperature air is provided. Since the stepwise distribution means for distributing stepwise to two or more places is provided, the high temperature air can be introduced into the evaporation chamber stepwise, and the high temperature air can be positively contacted with the atomized fuel particles. Therefore, the contact vaporization of the fuel can be efficiently performed, and the device can be downsized.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing an embodiment of the device of the present invention.

FIG. 2 is a partially sectional front view showing another embodiment of the method of the present invention.

FIG. 3 is a partially sectional front view of a conventional device.

[Explanation of symbols]

 11 Evaporation container 14 Evaporation chamber 15 Ejection nozzle 17 Stepwise distribution means 19 Primary inlet for hot air 20 Secondary inlet for high temperature air

Claims (1)

[Claims] 1. A liquid fuel vaporization device in which liquid fuel is atomized and supplied into heated air to directly vaporize and vaporize the liquid fuel, wherein atomized fuel and high temperature air are vaporized by contact. A liquid fuel evaporation apparatus, characterized in that a stepwise distribution means for stepwise distributing the supplied high temperature air to two or more locations is provided in the evaporation container.