JPH0886412A - Liquid fuel combustor - Google Patents

Abstract

PURPOSE: To prevent the adhering of soot or the like to a nozzle or the like while allowing the setting of a heating value relatively lower. CONSTITUTION: This apparatus is constituted of a vaporizer 8 adapted to vaporize a liquid fuel with a heater or the like, a nozzle 16 to jet a vaporized gas by the vaporizer 8, a blowing box 23 to blow air from a blower to the perimeter of the nozzle 16, a diffusion plate 26 mounted positioned facing a jetting hole of the nozzle 16 and a flame guide cylinder 25 wrapping the diffusion plate 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus used in a relatively small refuse incinerator or the like.

[0002]

2. Description of the Related Art A liquid fuel combustion apparatus is disclosed in, for example, Japanese Patent Laid-Open No. 6-
No. 213416 gazette or the like, a method in which liquid fuel is atomized from the tip of the nozzle 3b and, at the same time, air for combustion is blown around the nozzle by the blower 4 to burn at the tip of the nozzle, for example, JP-A-6-201108
As shown in Japanese Patent Publication No. JP-A-2003-138, liquid fuel in a tank 1 is supplied to a vaporizer 3 by a pump 2 and vaporized by a heater or the like in the vaporizer, and vaporized gas is mixed from a nozzle 5 to a burner 4. There is a method of ejecting it into a pipe and burning it in the burner's flame hole.

[0003]

On the other hand, the above-mentioned JP-A-6-
The method disclosed in Japanese Patent No. 213416 has a problem that atomization does not occur unless the amount of liquid fuel ejected from the nozzle is set to a relatively large amount, and is not suitable for a small burner having a low heat generation amount.

Further, in the case of the method disclosed in the above-mentioned Japanese Patent Laid-Open No. 6-201108, since a liquid fuel is vaporized and burned, it is possible to design a small burner having a low heating value by setting a nozzle. On the other hand, it is necessary to form the burner flame hole with a relatively small diameter, and even if soot or the like adheres to the flame hole portion due to the reason that the speed of ejection of the combustion flame from the flame hole is slow, etc. However, when this type of burner is used in, for example, a refuse incinerator, there is a problem that soot or the like remains on the flame hole portion, resulting in poor combustion.

Therefore, an object of the present invention is to provide a liquid fuel combustion apparatus capable of preventing soot and the like from adhering to the nozzle and capable of combustion with a relatively low calorific value.

[0006]

The present invention is directed to a vaporizer for vaporizing liquid fuel with a heater or the like, a nozzle for ejecting vaporized gas vaporized by the vaporizer, and air blown from a blower around the nozzle. The blower box, the diffuser plate mounted to face the nozzle ejection holes, and the flame guide cylinder surrounding the diffuser plate.

Further, according to the present invention, the carburetor is fixed to the rear of the nozzle, and the blower box is mounted on the nozzle side of the carburetor.

[0008]

[Operation] Liquid fuel is vaporized by the vaporizer and supplied to the nozzle, and vaporized gas is ejected from the ejection hole of the nozzle, and at the same time,
By blowing air from the blower around the nozzle with a blower box and igniting the vaporized gas ejected from the ejection hole by an appropriate means, the vaporized gas ejected from the ejection hole hits the diffusion plate and is blown from the blower. It mixes properly with the blown air and burns in the flame guide cylinder.

Thus, by setting the diameter of the ejection hole of the nozzle according to the required heat generation amount, it is possible to set a wide range from a low heat generation amount to a high heat generation amount, and by blowing air from around the nozzle by a blower box, It is possible to prevent soot and the like from adhering to the ejection holes and intrusion of dust and the like.

Further, by disposing the vaporizer behind the blower box, the blower box can prevent radiation heat or the like emitted from the flame guide tube from being emitted to the vaporizer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described first with reference to FIG. 1. (1) is a relatively small refuse incinerator that can be installed in general households, and is used for collecting various types of garbage, plastic, kitchen garbage, etc. For example, a cylindrical primary combustion chamber (2) having a capacity of about 30 liters and a non-illustrated incineration object is stored and incinerated, and the primary combustion chamber is installed adjacent to the primary combustion chamber and on the lower side wall. A secondary combustion chamber (3) in which an exhaust duct (2 ') connected to the side wall of (1) is connected in communication, an exhaust treatment chamber (4) in communication above the secondary combustion chamber, and this exhaust treatment It mainly comprises a chimney (5) connected to the upper part of the chamber and a burner device (6) installed around the secondary combustion chamber (3).

Further, the burner device (6) has a tank (7) for storing liquid fuel and a vaporizer (8) for vaporizing the liquid fuel in this tank.
A pump (9) for supplying oil to the carburetor, a nozzle device (10) connected to the carburetor, a burner head (11) attached to the tip of the nozzle device, and blowing air for combustion to the burner head. It mainly consists of a blower (12).

The nozzle device (10) is tilted slightly obliquely upward from the horizontal and has a vaporized gas outflow passage (13) of the vaporizer (8) therein, as shown in FIG. 2, for example. A communication passage (14) that communicates is formed, and at one end of this communication passage,
A nozzle holder (17) fixed to a nozzle (16) having an ejection hole (15) at the tip, and a needle (17) connected to the other end of the nozzle holder and slidably housed in the communication passage (14). 1
8) Plunger (19) that drives axially and the above nozzle
It is mainly composed of a nozzle cover (21) fixed to the tip of (16) with a screw (20), and the needle (18) is attached to the plunger (19).
The ejection hole (15) is opened and closed by the tip portion (22) of the needle (18).

Further, as shown in FIGS. 3 and 4, the burner head (11) surrounds the periphery from the periphery of the nozzle holder (17) to the tip of the nozzle cover (21) and accommodates them. Cylindrical blower box (23), flame guide tube (25) connected to substantially central portion of the tip surface (24) of the blower box (23) facing the nozzle (16), and this flame guide tube It is mainly composed of a diffusion plate (26) housed inside and mounted facing the nozzle (16), and an ignition plug (27) mounted close to the nozzle cover (21). .

Further, a connecting pipe (29) for connecting the blower duct (28) of the blower (12) is projectingly provided at a proper position on the tip surface (24) of the blower box (23), and the connecting pipe (29) Blower (1
The blast from 2) is introduced into the blast box (23), and the return pipe (30) is connected to the bottom of the peripheral wall.

The flame guide cylinder (25) has a rear end portion (31) protruding into the blower box (23) so as to surround the nozzle cover (21), and the connecting pipe (29). The air blown into the air blower box (23) by () is not blown directly to the tip of the nozzle cover (21).

On the other hand, the diffuser plate (26) has the flame guide tube (2
It has an outer diameter slightly smaller than the inner diameter of 5), forms an air passage (32) with the surrounding flame guide tube (25), and is located opposite the tip of the nozzle cover (21). A through hole (33) is bored at a substantially central portion, and a plurality of slit holes (34), (34), ... Are bored in a spiral shape around the through hole.

Then, the pump (9) is operated to activate the tank (7).
The liquid fuel in the inside is supplied to the vaporizer (8), the liquid fuel is heated and vaporized by a heater or the like (not shown) in the vaporizer, and the vaporized gas is passed through the vaporized gas outflow passage (13) -communication passage (14). At the same time as it is ejected from the ejection hole (15) of the nozzle (16) via the air blower, the blower (12) is activated to blow air into the blower box (23) through the blower duct (28), and the nozzle cover (21 ), And blow it into the flame guide tube (25).

Further, the flame guide cylinder (25) is ignited by igniting the vaporized gas ejected from the ejection hole (15) by the ignition plug (27).
Combustion is performed by forming a combustion flame inside.

At this time, the vaporizing gas ejected from the ejection holes (15) by the diffusion plate (26) and the air blown into the air blowing box (23) are mixed appropriately to promote the combustion of the vaporized gas. Prevent soot from entering the flame guide tube (25).

On the other hand, when incinerating the refuse incinerator (1),
The incineration object is put into the primary combustion chamber (2), and the incineration object is ignited by a matcher, a lighter or the like, and a burner device is used.
Ignite (6).

As a result, the combustion flame of the burner device (6) is swirled in the secondary combustion chamber (3) and the unburned gas flowing into the secondary combustion chamber (3) from the exhaust duct (2 ') is exhausted. While passing through the processing chamber (4), it is completely burned and discharged from the chimney (5) to the outside.

At that time, in the secondary combustion chamber (3), soot, dust, etc. are mixed in the unburned gas and swirl.
(6) Prevents these flame guide cylinders (25) from entering.

[0024]

According to the structure of the present invention, the liquid fuel is vaporized by the vaporizer and burned, so that the one having a relatively low calorific value can be set and the blower blows the air around the nozzle. Thus, it is possible to prevent soot and the like from entering the nozzle and to be used as an incinerator burner for a refuse incinerator or the like.

Further, according to the structure of the present invention, since the air blower box is attached to the nozzle side of the vaporizer, the vaporizer is shielded from the radiant heat of the combustion flame generated at the tip of the nozzle in the blower box, and the heat shield component is provided. Can be measured.

[Brief description of drawings]

FIG. 1 is a side view of a refuse incinerator using a liquid fuel combustion apparatus according to the present invention, partially broken away.

FIG. 2 is a vertical side sectional view showing a part of the embodiment of the present invention.

FIG. 3 is a front view showing an embodiment of the main part of the present invention.

FIG. 4 is a side elevational sectional view showing an embodiment of the main part of the same.

[Explanation of symbols]

 8 Vaporizer 15 Ejection hole 16 Nozzle 23 Blower box 25 Flame guide tube 26 Diffuser

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Kishimoto 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Sanyo Electric Co., Ltd. (72) Inventor Takashi Matsuda 3-201 Minamiyoshikata, Tottori City Tottori Prefecture Sanyo Denki Incorporated (72) Inventor Ryoichi Tanaka 881 Kyojima, Chiyoda Town, Kanzaki District, Saga Prefecture

Claims (2)

[Claims] 1. A vaporizer for vaporizing liquid fuel with a heater, a nozzle for ejecting vaporized gas vaporized by the vaporizer, a blower box for blowing air from a blower around the nozzle, and the nozzle. Liquid fuel combustion apparatus comprising a diffusion plate mounted opposite to the ejection hole of and a flame guide cylinder surrounding the diffusion plate. 2. The liquid fuel combustion apparatus according to claim 1, wherein the vaporizer is fixed to the rear of the nozzle, and the blower box is mounted closer to the nozzle than the vaporizer.