JPH0125853Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil combustor mainly used as a heat source for a boiler heater.

Conventionally, a combustor of the type in which a fuel scattering body and an igniter are provided in a pot-shaped burner having a large number of air holes on the circumferential surface is disclosed, for example, in Japanese Utility Model Application Laid-Open No. 119651/1983.

However, this method has the disadvantage that it takes time from the start of combustion to the transition to steady combustion.

The present invention aims to solve this problem by supplying a large amount of combustion air to the bottom of the pot-shaped burner at the start of combustion to speed up combustion at the bottom of the pot-shaped burner. The purpose of this burner is to achieve a rapid temperature rise and quickly shift to steady combustion.The pot-shaped burner 2, which has a large number of air holes 1 on its circumference, is equipped with a fuel scattering body 3 and an igniter 4.
In a type of combustor equipped with
At the same time, the pot-shaped burner 2 is provided with a supply port 6 for supplying combustion air from the lower surface thereof, and a damper 7 for adjusting the air volume is provided to open the supply port 6 for a certain period of time from the start of combustion.

In the illustrated embodiment, the inside of the outer casing 8 is divided into two upper and lower chambers by a partition plate 9, and within the upper chamber 8a, a pot-shaped burner 2 is placed at a distance on the outer circumferential surface of the pot-shaped burner 2 by a flange 10 on the periphery of its upper end. A blower fan 1 is installed in the lower chamber 8b by being connected and supported by the partition plate 9 and supported by the lower surface of the partition plate 9.
Attach motor 12 with motor 1 attached to the bottom surface. Then, a rotating shaft 13 rising from the motor 12 is made to face into the pot-shaped burner 2 through an opening 14 provided at the center of the bottom surface of the pot-shaped burner 2, and the fuel scattering body 3 is attached to the upper end of this rotating shaft 13. Ta. The fuel scattering body 3 consists of a receiving part 3a at the lower part that receives the fuel supplied from the fuel pipe 15, a tapered part 3b that spreads upward from the receiving part 3a, and a flange-shaped fuel scattering part 3c that continues to the upper end of the tapered part 3b. The fuel supplied to the receiving portion 3a is diffused by the tapered portion 3b and is uniformly scattered from the circumferential surface of the scattering portion 3c.

In the drawing, reference numeral 16 denotes a partition plate that partitions the pot-shaped burner 2 into upper and lower sections, and the partition plate 16 has an opening 16a in the center with a slightly smaller diameter than the cover plate 5, and a cylindrical wall rising from the circumferential surface of the opening 16a. 17, and the cylinder wall 17 has a large number of through holes 17a.

The air supply port 6 is an opening provided in the side surface of a cylindrical body 18 provided between the partition plate 9 and the bottom of the pot so as to surround the rotating shaft 13, and is opened only for a certain period of time from the start of combustion. In the illustrated embodiment in which a damper 7 is provided, the damper 7, which is normally closed by a spring 19, is opened by an electromagnetic coil 20 that is energized for a certain period of time after the combustor starting operation.

In the drawing, reference numeral 21 indicates a ventilation hole provided in the partition plate 9 that communicates the lower chamber 8a and the upper chamber 8b.
1, the air generated by the blower fan 11 is supplied to the air blowing chamber 23 formed on the circumferential surface of the pot-shaped burner 2.

In the illustrated embodiment, the partition plate 9 is used as a fuel receiving tray, and a drain pipe 22 is connected to the partition plate 9.

Next, combustion by this device will be explained.

When the fan 11 is driven and rotated by the motor 12 and the fuel spray body 3 is rotated, fuel is supplied to the fuel spray body 3 via the fuel supply pipe 15.
The fuel is scattered from the fuel scattering portion 3b of the fuel scattering body 3, and is ignited and combusted upon contact with the spark discharge generated in the igniter 4.

At this time, since the damper 7 facing the air supply port 6 is open, a large amount of air is supplied to the lower space of the partition plate 16 of the pot-shaped burner 2 through the air supply port 6, and sufficient combustion occurs in the lower space. will be done. Therefore, the bottom of the pot-shaped burner 2 is quickly heated. When the damper 7 is closed in this state, when the air supply from the air supply port 6 is cut off, secondary air is sought and burned in the upper part of the pot-shaped burner 2.

That is, once concentrated in the center by the cylinder wall 17,
Next, a stable mixed gas is created by the air flow guided to the wall surface of the pot-shaped burner 2 by the combustion control plate 5 and blown from the air hole 1 in the wall surface of the pot-shaped burner 2, and further the pot-shaped burner 2 is controlled. A large amount of air is supplied from the air hole 1 provided above the plate 5, resulting in blue flame combustion.

In this way, according to the present invention, the combustion control plate 5 is placed at the center above the fuel scattering body 3 in the pot-shaped burner 2.
At the same time, the pot-shaped burner 2 is provided with a supply port 6 for supplying combustion air from the bottom surface thereof, and a damper 7 is provided for adjusting the air volume that opens only for a certain period of time from the start of combustion. It is possible to supply a large amount of air to the bottom of the pot to achieve rapid combustion, and to cut off the supply of air from the air supply port 6 after transitioning to steady combustion. This has the effect of achieving stable blue flame combustion by so-called diffusion combustion in which combustion is carried out while gradually replenishing combustion air from the air holes 1a.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a cut-away side view, and FIG. 2 is a cut-away sectional view taken along the - line. 1...Air hole, 2...Pot-shaped burner, 3...
fuel scattering body, 4... igniter, 5... combustion control board,
6... Supply port, 7... Damper.

Claims (1)

[Scope of utility model registration request] In a combustor of the type in which a pot-shaped burner 2 with a large number of air holes 1 on the circumference is provided with a fuel scattering body 3 and an igniter 4, the upper center of the fuel scattering body 3 in the pot burner 2 is provided. A combustion control plate 5 is provided on the pot-shaped burner 2, and a supply port 6 is provided for supplying combustion air from the bottom surface of the pot-shaped burner 2, and a damper 7 for adjusting the air volume is provided to open the supply port 6 for a certain period of time from the start of combustion. Oil burner.