JPH04324006A - Liquid fuel evaporator - Google Patents

Abstract

PURPOSE:To provide a compact liquid fuel evaporator wherein liquid fuel sprayed into an evaporation chamber enters the evaporation chamber sufficiently and has the opportunity of being brought into contact with high-temperature air to be sufficiently mixed with it until the sprayed liquid fuel reaches a feed port, whereby the liquid fuel can be evaporated efficiently and stably. CONSTITUTION:A liquid fuel evaporator is provided at least with a cylindrical evaporation container 10, a nozzle 22 for spraying atomized liquid fuel from an end wall 12 on one side of the evaporation chamber 10 into said container 10, and a high-temperature air feed means 15 for feeding high-temperature air into the evaporation container 10. In this liquid fuel evaporator, the atomized liquid fuel sprayed into the aforementioned evaporation container 10 is directly evaporated by contact with the hightemperature air, and the mixed gas thus obtained is so arranged as to be fed to a burner 25 side. Further, a feed port 14 for feeding the mixed gas is provided in a position apart from the ejection port of the nozzle 22.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a method for using liquid fuel such as kerosene,
The present invention relates to a liquid fuel evaporator that directly vaporizes the fuel at a relatively low temperature using heated air and sends the resulting mixture to the combustor side.

0002

[Prior Art] Fig. 3 shows a conventional example of this type of liquid fuel evaporator.
, shown in Figure 4. FIG. 3 is a partially sectional front view of a conventional device, and FIG. 4 is a partially sectional side view of the same. An evaporation chamber 2 is configured in a cylindrical evaporation container 1, and a nozzle 3 for spraying liquid fuel is provided.
is placed on the central axis of the cylindrical evaporation container 1 and faces into the evaporation chamber 2 inside. The liquid fuel is sent to the nozzle 3 and introduced into the evaporation chamber 2 in an atomized state. The evaporation vessel 1 is provided with one high-temperature air inlet 7 in the tangential direction on the cylindrical wall surface near the end wall facing the injection port of the nozzle 3, and the high-temperature air introduced from the inlet 7 , the liquid fuel sprayed into the evaporation chamber 2 is directly vaporized at a relatively low temperature. The obtained air-fuel mixture is sent to the combustor 9 side from a delivery port 8 provided on the cylindrical wall near the injection port, and is subjected to combustion.

0003

However, in the above-mentioned conventional liquid fuel evaporation device, the evaporation chamber 2 is constructed within the evaporation container 1 consisting of a cylindrical outer tube and disk-shaped both end walls, and the nozzle 3 is located at either end. facing on the central axis of the outer cylinder from the end wall, the high-temperature air feeding means is located on the side opposite to the nozzle 3 position, and its feeding pipe is connected tangentially to the inlet 7 of the outer cylinder, In addition, since the air-fuel mixture sending pipe from the evaporation chamber 2 to the combustor 9 side is connected tangentially to the sending port 8 of the outer cylinder, the high-temperature air flowing toward the air-fuel mixture sending port 8 is connected. Since the flow is strong, the liquid fuel sprayed into the evaporation chamber is swept away by the high-temperature air and sent into the delivery port 8 in a short-circuit manner. Therefore, actual evaporation occurs only in the space until the sprayed liquid fuel reaches the delivery port 8, resulting in the problem that the evaporation chamber 2 is not used effectively. Furthermore, since the spray does not spread sufficiently and comes into contact with the high temperature air, there is a drawback that the spray particles and the high temperature air are not sufficiently mixed.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and ensures that the liquid fuel sprayed into the evaporation chamber sufficiently enters the evaporation chamber and has sufficient mixing contact with high-temperature air before reaching the outlet. The purpose of the present invention is to provide a compact liquid fuel evaporation device that allows efficient and stable evaporation.

[0005]

[Means for Solving the Problems] In order to achieve the above object, a liquid fuel evaporation device of the present invention includes a cylindrical evaporation container,
The atomized liquid sprayed into the evaporation container includes at least a nozzle for spraying atomized liquid fuel into the container from one side end wall of the evaporation container, and a high-temperature air sending means for sending high-temperature air into the evaporation container. A liquid fuel evaporation device that directly evaporates fuel by contact with the high-temperature air and sends the mixture to the combustor side, wherein the mixture is disposed at a position away from the injection port of the nozzle. It is characterized by having a delivery port.

[0006]

[Operation] Since the air-fuel mixture outlet is provided at a position away from the nozzle injection port, this eliminates the bias in the flow of high-temperature air near the nozzle, and after the spray spreads to a certain extent, it comes into contact with the high-temperature air. be able to. Therefore, the liquid fuel particles can sufficiently come into contact with high-temperature air within the container, and can be efficiently and stably evaporated within the compact container.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially sectional front view of an apparatus for implementing the present invention, and FIG. 2 is a partially sectional side view of the same.

The evaporation container 10 is composed of a cylindrical outer tube 11 and a disc-shaped end wall 12, and has an evaporation chamber 13 inside. A nozzle structure 23 having a nozzle 22 facing into the container 10 is attached to one end wall 12 of the evaporation container 10 on the central axis. Further, in the outer cylinder 11 of the evaporation container 10, a high temperature air inlet 15 is provided in a tangential direction on the side far from the nozzle structure 23. Reference numeral 26 denotes an introduction pipe arranged tangentially from the introduction port 15. The introduction pipe 26, the high temperature air introduction port 15, and the high temperature air generator 27 constitute a high temperature air feeding means.

A delivery port 14 is provided at a distance L from the injection nozzle structure 23 to send the evaporated liquid fuel to the combustor 25 side. This outlet 1
Position 4 is not provided at least near the injection port of the nozzle 22. They should be placed at a relatively distant distance L. This distance L is adjusted somewhat depending on the length of the outer cylinder 11, the position of the high temperature air inlet 15, the high temperature air introduction pressure, the jetting force of the nozzle 22, etc. 24 is a delivery pipe arranged tangentially from the delivery port 14.

[0010] When the operation is started, the high temperature air inlet 15
High temperature air is introduced from the nozzle 22, and liquid fuel is sprayed from the nozzle 22. At this time, the delivery port 14 is connected to the nozzle 22.
Because it is not near the nozzle 22, the flow of high-temperature air in the vicinity of the nozzle 22 is less likely to be biased or turbulent.Therefore, the atomized fuel is not forced in a biased direction by the high-temperature air immediately after it is ejected, and the flow inside the combustion chamber 13 is less likely to occur. can fully invade and spread.

In the above embodiment, the delivery pipe 24 is provided in the tangential direction from the delivery port 14, but it may be provided in the radial direction or in any other direction. Further, although the high temperature air inlet 15 is provided in the tangential direction of the outer cylinder 11, it may also be provided on the central axis of the end wall 12 on the opposite side to the nozzle 22.

0012

According to the liquid fuel evaporator according to the first aspect of the present invention, the air-fuel mixture delivery port is provided at a position away from the injection port of the nozzle. The flow of high-temperature air near the nozzle is unbalanced, and the spray spreads to a certain extent before coming into contact with the high-temperature air. As a result, the liquid fuel particles will come into contact with the high-temperature air after being sufficiently retained and dispersed within the container. Therefore, even if the spray penetration of the liquid fuel itself is low, it is possible to sufficiently contact the high-temperature air within the evaporation chamber. This allows stable and efficient evaporation of liquid fuel. Therefore, it is possible to downsize the evaporation container.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of an apparatus implementing the present invention.

FIG. 2 is a partially sectional side view of the same implementation device.

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

FIG. 4 is a partially sectional side view of the conventional device.

[Explanation of symbols]

10 Evaporation container 12 End wall 14 Mixture outlet 15 High temperature air inlet 25 Combustor

Claims (1)

[Claims] Claim 1: A cylindrical evaporation container and one of the evaporation containers.
It has at least a nozzle that sprays atomized liquid fuel into the container from a side end wall, and a high-temperature air sending means that sends high-temperature air into the evaporation container, and the atomized liquid fuel sprayed into the evaporation container is transferred to the high-temperature air. A liquid fuel evaporator that evaporates the mixture directly by contact with the liquid fuel and sends the mixture to the combustor side, the mixture having a delivery port located away from the injection port of the nozzle. A liquid fuel evaporation device characterized by: