JPS6034892Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid fuel combustion device that efficiently vaporizes liquid fuel.

A conventional liquid fuel combustion device is shown in FIG.

In the figure, 15 is the combustion device main body, 1 is the inner cylinder part IA and the outer cylinder part 1
The space between the inner cylinder part IA and the outer cylinder part IB is used as a swirling mixing chamber 1a for liquid fuel and combustion air, and a burner is installed in an open part on one side of the space. The swirl mixer is formed of eleven parts and is disposed within the combustion apparatus main body 15.

2 is a heater embedded in the other side closed part of the space between the inner cylindrical part IA and the outer cylindrical part 1B of the swirling mixer 1, and 3 is a heater whose tip end fuel supply port is inside the swirling mixing chamber 1a of the swirling mixer 1. A liquid fuel oil pipe is provided to penetrate the wall of the outer cylinder part IB so as to face it, 4 is a combustion primary air circulation hole as a penetration part of the oil pipe 3 of the outer cylinder part IB, and 5 is a hole on the outside of the outer cylinder part IB. 8 is an inner secondary air passage formed inside the inner cylinder part IA;
Reference numeral 6 denotes a secondary air circulation hole opened in a mounting plate 16 disposed to cross the outer secondary air passage 5, 7 an inner peripheral surface of the inner cylinder portion IA, 10 a spark plug, 11 a burner, 12 is a heat recovery wall that is integrated with the swirl mixer 1 and recovers the combustion heat of the flame formed by a part of the burner.

In the conventional liquid fuel combustion apparatus configured in this way, liquid fuel is fed into the swirling mixing chamber 1a through the liquid fuel feed pipe 3, and the flame formed by the heat generated by the heater 2 and the burner 11 is heated. Among the heat transferred to the heat recovery wall 12 from the heat recovery wall 12, it is vaporized by the heat conducted to the swirl mixer, and mixed with the primary air sucked into the swirl mixing chamber 1a from the combustion primary air circulation hole 4. .

The mixed liquid fuel is supplied to the burner 11, ignited by the spark plug 10, and continuously combusted.

In addition, the secondary air for combustion is supplied to the outer and inner secondary air passages 5,
8 and are supplied to the flame of 11 burners, resulting in good combustion.

However, in the case of the above-mentioned liquid fuel combustion device, the combustion secondary air flowing between the inside of the inner cylinder part IA and the outside of the outer cylinder part IB of the swirl mixer 1 flows in contact with the surface of the swirl mixer 1. , the swirl mixer 1 is cooled.

Therefore, the heat transferred from the flame of the burner 11 to the heat recovery wall 12 and then transferred to the swirl mixer 1 and the heat generated by the heater 2 are taken away by the secondary air, so that the liquid fuel is vaporized. It becomes difficult to do so.

The present invention was developed in view of the above points, and includes a gap between the inner peripheral surface of the inner cylindrical portion of the swirl mixer and the passage for circulation of secondary air for combustion inside the inner cylindrical portion of the swirl mixer. Provided is a liquid fuel combustion device that eliminates the conventional drawbacks by providing a guide member and forming a passage for the secondary air so that the secondary air does not come into contact with the surface of the swirling mixer. The purpose is to

Hereinafter, one embodiment of the present invention will be described based on FIG. 2.

Incidentally, the same elements as in FIG. 1 are given the same reference numerals and their explanations will be omitted.

In FIG. 2, 13 is the inner circumferential surface 7 of the inner cylinder part IA of the swirling mixer 1.
This is a cylindrical guide member disposed in the inner secondary air passage 8 with a gap 14 between the guide member and the guide member, and has the structure shown in FIG.

According to the liquid fuel combustion device having such a configuration, the swirl mixer 1
The combustion secondary air flowing through the inner secondary air passage 8 flows through the passage formed by the guide member 13 and is supplied to the flame of the burner 11 section.

At this time, the secondary air flows through the guide member 13 which is provided with a gap 14 from the inner circumferential surface 7 of the swirl mixer 1, so that the guide member 13 protect from cooling.

Therefore, in order to reduce the heat taken by the secondary air from the swirl mixer 1, the guide member 13 conducts the heat transferred from the flame of the burner 11 to the heat recovery wall 12 to the swirl mixer 1. heat is used effectively.

Therefore, the liquid fuel can be vaporized well, and the exhaust can be smoothly exhausted.

As explained above, according to the present invention, cooling of the swirl mixer is suppressed by reducing the amount of secondary combustion air that comes into direct contact with the surface of the swirl mixer, so heat is recovered by the heat recovery wall. is fully utilized when vaporizing liquid fuel.

Furthermore, since the recovered heat is effectively utilized, the power consumption of the heater in the swirl mixer is reduced.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional liquid fuel combustion device, FIG. 2 is a vertical cross-sectional view showing one embodiment of the liquid fuel combustion device according to the present invention, and FIG. 3 is a guide member which is the main part of the present invention. FIG. 6 is a perspective view A and a vertical cross-sectional view B of one embodiment of 1... swirling mixer, IA... inner cylinder part,
IB...Outer cylinder part, 5. End: Secondary air passage 13: Guide member, 14: Gap.

Claims (1)

[Scope of utility model registration request] It is formed into an inner and outer double cylinder shape consisting of an inner cylinder part and an outer cylinder part, and the space between the inner cylinder part and the outer cylinder part is used as a swirling mixing chamber for liquid fuel and combustion air. A swirling mixer having a burner section formed in a side open part is provided in the main body, and a secondary air passage for combustion is formed inside the inner cylinder part and outside the outer cylinder part of the swirling mixer in the main body, In the liquid fuel combustion apparatus, the liquid fuel is mixed and vaporized by recovering the heat generated by the heater and the combustion heat of the fuel, the liquid fuel being sent into the swirling mixing chamber of the swirling mixer through an oil feed pipe, the inner cylinder part of the swirling mixer A cylindrical guide member is provided on the side with a gap between the inner peripheral surface of the cylindrical portion and the secondary air is configured to flow through the guide member so as not to come into contact with the inner peripheral surface of the cylindrical portion of the swirl mixer. A liquid fuel combustion device characterized by: