JPS63223409A - Gasified kerosene burner - Google Patents

Abstract

PURPOSE:To minimize the time required for imperfect combustion caused by forced combustion at the time of ignition and keep the necessary minimum combustion of kerosene at the time of steady-state combustion by installing a plurality of small ports for primary air supply near nozzle ports for the primary air and fuel supply at the center of an inner cylinder bottom wall. CONSTITUTION:A plurality of small ports 6 for primary air playing the same role as that of a plurality of small ports 3, 4 installed at the side wall of the upstream side of an inner cylinder 2 are installed near a nozzle port 5 for primary air and fuel supply placed at the center part of the inner cylinder bottom wall. When fuel is not sufficiently gasified by the insufficient heating of a vaporization cylinder 7 at the initial time of ignition, flames are held at small ports 4, 4A (not shown) for secondary air supply and the port 6 wholly and the combustion at the bottom part of the cylinder 2 becomes maximum and the heating of the cylinder 7 and gasification are rapidly promoted and oil dripping is reduced. When the combustion is switched over to steady-state one, flames at the ports 6 and 4 can not be held and fire extinction phenomenon occurs because of a fuel excess condition to the supplied amount of air. Following this, the heating of the bottom part of the cylinder 2 is carried out by only the flames at the ports 4A and the combustion is reduced to such one that can prevent atomized fuel from stagnating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a kerosene gasification burner that instantaneously gasifies fuel (kerosene) sprayed from a nozzle and burns it with blue flame.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. 57-14109, a conventional kerosene gasification burner has a vaporizing tube that is integrally drawn and has a flame hole in a part thereof, as a means of gasifying the fuel at the initial stage of ignition.
The method is to use electrodes to generate an electric discharge until the temperature in the vaporizer cylinder reaches a temperature at which the fuel can be sufficiently gasified, and to force the fuel to burn inside the vaporizer cylinder. For this reason, considering the outside temperature, etc., 1,
The forced combustion time for initial ignition is quite long (about 30 seconds to 1 minute). Forced combustion within the vaporization cylinder results in incomplete combustion, which tends to cause a large amount of burnt lids and tar adhesion due to incomplete combustion. Furthermore, since forced combustion is regulated by time, if the outside temperature changes, the balance of combustion will be disrupted.

[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 combustion amount upstream of the inner cylinder at the time of ignition, reduce oil dripping, and reduce the amount of kerosene during steady combustion. The objective is to gasify the gas and achieve the minimum amount of combustion required.

[Failure to solve the problem]

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 primary air supply holes near the primary air hole/fuel nozzle hole in the center of the inner cylinder bottom wall in addition to the above. Effect] The present invention provides a burner cylinder, an inner cylinder disposed in the burner cylinder, a plurality of small holes for secondary air supply provided in the downstream side wall of the inner cylinder, and a plurality of secondary air supply holes provided in the upstream side wall of the inner cylinder. A plurality of small holes for secondary air supply are provided in the center of the bottom wall of the inner cylinder, and a nozzle hole for primary air and fuel supply is provided in the center of the bottom wall of the inner cylinder. A kerosene gasification burner comprising a vaporizing cylinder having a substantially hemispherical portion and a cylindrical base end, the plurality of secondary air supply small holes provided in the upstream side wall of the inner cylinder; By making the hole diameters different, it is possible to change the amount of flame burned in the secondary air supply small hole during ignition and during steady combustion.

In addition, a plurality of primary air holes are provided in the vicinity of the primary air hole and fuel supply nozzle hole provided in the center of the bottom wall of the inner cylinder, and the holes are provided upstream of the inner cylinder. In addition to further changing the amount of combustion at the side, 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 side and upstream side VcVi of the side wall. O'J hole 4 and 4
AI- has different small pore diameters. Further, a primary air hole/fuel supply nozzle hole 5 is provided in the center of the bottom wall of the inner cylinder 2, and the vicinity VC of the nozzle hole 5 is located at the small hole 4.4.
A plurality of small holes 6 for primary air supply having the same role as A are provided. It is a vaporizing cylinder arranged in the inner cylinder 2 so as to cover the seven nozzle holes 5 and the small hole 6 for secondary air supply. It has a configuration in which it is divided into a cylindrical portion 7B. The substantially hemispherical portion 7A and the cylindrical portion 7B are attached to the inner cylinder 2 via legs 10 with gaps 8 and 9 provided therein, respectively. 11
is a box-shaped partition plate attached to the back side of the bottom wall of the inner cylinder 2, and is provided with a hole 12 for intake of secondary air. Reference numeral 13 denotes a fuel injection nozzle, which is disposed on the center of the nozzle hole 5 and is connected to the partition plate 11.
is installed on. 14 is an ignition electrode attached to the partition plate 11.

In the kerosene gasification burner having such a configuration, the combustion air is passed through the nozzle hole 5 through the hole 12 of the partition plate 11 as primary air.
The secondary air is supplied into the vaporizer cylinder 7 through the small holes 6, and the secondary air is supplied into the inner cylinder 2 through the small holes 3.4 and 4A in the inner cylinder 2. On the other hand, fuel (kerosene) is sprayed through 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. Then, the radiant heat of the flame 15 heats the hemispherical part 7A of the vaporization cylinder 7, promoting the gasification of the fuel, and the bottom part of the inner cylinder 2 is heated by the flame 16, so that the sprayed fuel accumulates in that part. is prevented. The ignition is performed by igniting the sprayed fuel from the fuel spray nozzle 13 using the ignition electrode +4. Of the flames 16 in the small holes 4 and 4A, the flame in the small hole 40 portion where the hole diameter is small becomes extinguished as the gasification of the fuel is promoted. Similarly, a small hole 6 for supplying secondary air, which is provided near the nozzle hole 5, forms a flame at the initial stage of ignition, but like the small hole 4, the gasification of the fuel is promoted. As a result, the inflammation disappears.

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, Vr-c, the secondary air supply small hole 4.4A and the secondary air small hole 6 The flame is stabilized in all of the cylinders, 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, heating of the carburetor cylinder is promoted, fuel gasification is promoted,
When the combustion shifts to steady state, the flames in the secondary air holes 6 and the secondary air holes 4 are in a state where there is too much fuel compared to the amount of air supplied, and 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, by making the small holes for supplying secondary air upstream of the inner cylinder 2 different diameters and providing the small holes for supplying primary nitrogen near the nozzle hole, υ, Combustion upstream of the inner cylinder at the time of ignition is maximized, promoting fuel vaporization and greatly reducing oil dripping.At the same time, during steady state, combustion at the bottom of the inner cylinder 2 is limited to the required amount/J%. Therefore, less soot is generated due to excessive combustion at the bottom of the inner cylinder 2. This is a gasification burner with a wide range of good combustion.

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

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the kerosene gasification burner of the present invention, FIG. 2 is a cross-sectional view taken along the line T in FIG. 1, and FIG. 3 is a cross-sectional view of FIG. This is a drawing. 1...Burner cylinder 2...Inner cylinder 3, 4, 4
A... Small hole for secondary air supply 5... - Firebox air hole and nozzle hole for fuel supply 6... - Small hole for secondary air supply 7... Vaporization tube.

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 a side wall on the downstream side of the inner cylinder, and an upstream side of the inner cylinder. It covers a plurality of secondary air holes provided in the side wall (near the bottom wall of the inner cylinder), a primary air hole/fuel nozzle hole provided in the center of the bottom wall of the inner cylinder, and the nozzle hole. In a kerosene gasification burner that is arranged inside an inner cylinder and is equipped with a vaporizing cylinder having a substantially hemispherical tip end and a cylindrical base end, it is provided on the side wall of the upstream side of the inner cylinder (near the bottom wall of the inner cylinder). A kerosene characterized in that a plurality of primary air holes that play the same role as the plurality of secondary air supply holes provided in the bottom wall of the inner cylinder are provided in the vicinity of the primary air hole and fuel nozzle hole in the center of the bottom wall of the inner cylinder. Gasification burner. 2. The kerosene gasification burner according to claim 1, wherein the plurality of secondary air supply small holes provided in the side wall on the upstream side of the inner cylinder (near the bottom wall of the inner cylinder) have different diameters.