JPH058324B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a fuel (kerosene) sprayed from a nozzle.
This product relates to a kerosene gasification burner that instantly gasifies oil and burns it with blue flame.

[Conventional technology]

The conventional kerosene gasification burner was published in Japanese Patent Application Laid-Open No. 57-14109.
As described in the issue, the vaporizing tube is a one-piece drawn product with a flame hole drilled in a part of it, and as a means of gasifying the fuel at the initial stage of ignition, it is used until the vaporizing tube reaches a temperature that can sufficiently gasify the fuel. , a method is used in which electric discharge is generated through electrodes and combustion is forced within the vaporization cylinder. Therefore, taking into account the outside temperature, etc., the forced combustion time at the initial stage of ignition is quite long (about 30 seconds to 1 minute). Forced combustion in the vaporization cylinder results in incomplete combustion, which tends to cause a large amount of burnt deposits and tar deposits due to incomplete combustion. Furthermore, since forced combustion is regulated by time, if the outside temperature changes, the balance of combustion is thrown off.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into account seizure caused by incomplete combustion within the vaporization cylinder during ignition, or imbalance in combustion when the outside temperature or the like changes.

The purpose of the present invention is to minimize the incomplete combustion time due to forced combustion at the time of ignition, increase the amount of combustion at the bottom of the inner cylinder at the time of ignition, reduce oil dripping, and reduce the amount of kerosene during steady combustion. The goal is to achieve the minimum amount of combustion necessary to gasify the gas. Furthermore, when a burner with a large combustion amount is ignited, the combustion amount at the bottom of the inner cylinder is increased to minimize the incomplete combustion time.

[Means for solving problems]

The above object is achieved by making the diameters of the plurality of secondary air supply small holes provided in the upstream side wall of the inner cylinder different. Furthermore, in a burner with a large combustion amount, this can be achieved by providing a plurality of small holes for primary air supply in the vicinity of the primary air hole/fuel nozzle hole in the central part of the bottom wall of the inner cylinder.

[Effect]

The present invention provides a burner cylinder, an inner cylinder disposed in the burner cylinder, a plurality of secondary air supply small holes provided in a downstream side wall of the inner cylinder, and a plurality of secondary air supply small holes provided in an upstream side wall of the inner cylinder. The inside of the inner cylinder is arranged to cover the small secondary air supply hole, the primary air hole and fuel supply nozzle hole provided in the center of the bottom wall of the inner cylinder, and the nozzle, and the tip is approximately In a kerosene gasification burner comprising a hemispherical vaporizing cylinder and a cylindrical base end, the hole diameter of the plurality of secondary air supply small holes provided in the upstream side wall of the inner cylinder is By making the diameters different, it is possible to change the amount of flame burned in the secondary air supply small holes during ignition and steady combustion.

In addition, when a burner with a large combustion amount is used, a plurality of primary air holes and fuel supply nozzle holes provided in the center of the bottom wall of the inner cylinder are located near the primary air hole hole and the fuel supply nozzle hole, which have a similar role as the secondary air By providing the small air holes, the amount of combustion on the upstream side of the inner cylinder is further changed, the amount of combustion at the time of ignition is increased, and oil dripping at the time of ignition is further reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 shows a longitudinal sectional view of a kerosene gasification burner according to the invention. In Fig. 1, 1 is a burner cylinder, 2 is an inner cylinder disposed inside the burner cylinder 1, and a plurality of small holes 3, 4, 4A for supplying secondary air are provided on the downstream and upstream sides of the side wall of the inner cylinder. It is provided. The small holes 4 and 4A have different small hole diameters.
In addition, a primary air hole/fuel supply nozzle hole 5 is provided in the center of the bottom wall of the inner cylinder 2, and a plurality of primary air holes having the same role as the small holes 4 and 4A are provided near the periphery of the nozzle hole 5. A small hole 6 for supply is provided. 7 is a nozzle hole 5 and a small hole 6 for supplying secondary air.
This vaporizing tube 7 is disposed within the inner tube 2 so as to cover the inner tube 2. The vaporizing tube 7 is divided into a substantially hemispherical portion 7A at the distal end and a cylindrical portion 7B at the proximal end.
The substantially hemispherical portion 7A and the cylindrical portion 7B are connected to the inner tube 2 via the legs 10 with gaps 8 and 9 provided therein, respectively.
attached to. 11 is a box-shaped partition plate attached to the back of the bottom wall of the inner cylinder 2, with holes 1 for primary air intake.
2 are provided. A fuel injection nozzle 13 is arranged concentrically with the nozzle hole 5 and attached to the partition plate 11. 14 is an ignition electrode attached to the partition plate 11.

In the kerosene gasification burner with such a configuration, combustion air enters through the hole 12 of the partition plate 11 as primary air and is supplied into the vaporization cylinder 7 through the nozzle hole 5 and the small hole 6, and as secondary air, it enters the gasification cylinder 7 through the small hole in the inner cylinder 2. Hole 3, 4, 4
It is supplied into the inner cylinder 2 from A. On the other hand, fuel (kerosene) is sprayed from the fuel injection nozzle 13, passes through the nozzle hole 5, hits the vaporization tube 7, and is gasified. The vaporized gas is transferred to the hemispherical part 7A and the cylindrical part 7B of the vaporizing cylinder 7.
and the gap 9 between the cylinder part 7B and the bottom wall of the inner cylinder 2, and mix with secondary air supplied from the small holes 3, 4, and 4A of the inner cylinder 2, forming flames 15 and 16. do. The radiant heat of the flame 15 heats the hemispherical part 7A of the vaporization cylinder 7, promoting gasification of the fuel, and the flame 16 heats the bottom of the inner cylinder 2, preventing the sprayed fuel from accumulating in that part. be done. The ignition is performed by igniting the sprayed fuel from the fuel spray nozzle 13 using the ignition electrode 14. Furthermore, among the flames 16 of the small holes 4 and 4A,
The flame in the portion of the small hole 4 having a small hole diameter is extinguished as the gasification of the fuel is promoted. Similarly, a small hole 6 for supplying primary air provided near the nozzle hole 5 forms a flame at the initial stage of ignition;
Similarly, as the gasification of the fuel is promoted, the flame is extinguished.

According to the present invention, at the initial stage of ignition, when the heating of the vaporization cylinder 7 is insufficient and the gasification of the fuel is insufficient, the flame is applied to all of the secondary air supply small holes 4, 4A and the primary air small holes 6. The flame is held constant, combustion at the bottom of the inner cylinder 2 is maximized, heating of the vaporizing cylinder 7 and gasification are rapidly promoted, and oil dripping is reduced. In addition, when the heating of the vaporization cylinder is promoted, the fuel gas is promoted, and the state shifts to steady combustion, the flames in the primary air holes 6 and the secondary air holes 4 become in a state where there is an excess of fuel relative to the amount of supplied air. The flame cannot be held and the flame goes out. Accordingly, the heating of the bottom of the inner cylinder 2 is reduced to only the flame of the small hole 4A, and the combustion is reduced to a state where the accumulation of the sprayed fuel can be prevented, thereby continuing steady combustion.

〔Effect of the invention〕

As explained above, according to the present invention, the inner cylinder 2
By making the small hole for secondary air supply upstream of the cylinder have a different diameter and providing the small hole for primary air supply near the nozzle hole, combustion upstream of the inner cylinder at the time of ignition can be maximized and fuel vaporization can be promoted. At the same time, oil dripping is greatly reduced, and at the same time, during steady state, combustion at the bottom of the inner cylinder 2 is minimized, so soot is generated less due to excessive combustion at the bottom of the inner cylinder 2. If you have a burner with a large amount of combustion, by adding a small hole for primary air near the nozzle hole, you can increase the amount of combustion at the bottom of the inner cylinder during ignition and minimize the incomplete combustion time. Become.

Furthermore, even if the outside temperature changes, the extinguishing of the flame in the primary air holes 6 and the secondary air holes 4 is automatically adjusted according to the state of fuel gasification.
This is a gasification burner with a wide range of good combustion.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the kerosene gasification burner of the present invention, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view of Fig. 1 seen from the direction D. It is a drawing. 1... Burner cylinder, 2... Inner cylinder, 3, 4, 4A...
...Small hole for secondary air supply, 5...Small hole for primary air supply and fuel supply nozzle hole, 6...Small hole for primary air supply,
7... Vaporizer cylinder.

Claims (1)

[Claims] 1. A burner cylinder, a bowl-shaped inner cylinder disposed within the burner cylinder, a plurality of secondary air holes provided in the side wall of the upper part of the inner cylinder, and a bottom of the inner cylinder. A plurality of secondary air holes provided in the side wall near the wall, a plurality of primary air holes and fuel nozzle holes provided in the center of the bottom wall of the inner cylinder, and a plurality of primary air holes and fuel nozzle holes provided in the center of the bottom wall of the inner cylinder, and a A kerosene gasification burner that is disposed inside an inner cylinder and includes a vaporizing cylinder having a hemispherical tip and a cylindrical base end,
A kerosene gasification burner characterized in that a plurality of small secondary air holes provided in the side wall near the bottom wall of the inner cylinder have different diameters. 2. A burner cylinder, a bowl-shaped inner cylinder disposed inside the burner cylinder, a plurality of small secondary air holes provided in the side wall of the upper part of the inner cylinder, and a plurality of small secondary air holes provided in the side wall near the bottom wall of the inner cylinder. a plurality of secondary air holes provided in the center of the bottom wall of the inner cylinder, a plurality of primary air holes and fuel nozzle holes provided in the center of the bottom wall of the inner cylinder, and a plurality of primary air holes and fuel nozzle holes arranged inside the inner cylinder so as to cover the nozzle holes. A kerosene gasification burner comprising a hemispherical distal end and a cylindrical vaporizing tube at the proximal end,
The secondary air holes of different diameters are provided on the side wall near the bottom wall of the inner cylinder, and the primary air holes have the same role as the plurality of secondary air holes provided on the side wall near the bottom wall of the inner cylinder. A kerosene gasification burner characterized in that a plurality of holes are provided in the center of the bottom wall of the inner cylinder near the primary air hole/fuel nozzle hole.