JPS5838251Y2 - Kerosene combustion burner - Google Patents

Description

[Detailed description of the device] This device is configured to supply droplet kerosene and air to the burner body through the same conveyance pipe, and to eject the atomized air-fuel mixture from the outlet from the burner body. , energizes one part of the heater only during the initial ignition, turns off the energization when the flame stabilizes after ignition, and continues combustion by utilizing the heat generated by combustion itself.
Furthermore, the present invention aims to provide a combustion burner for kerosene that is capable of complete combustion and has high thermal efficiency.

Recently, research and development has been carried out on heating equipment that atomizes and burns kerosene using ultrasonic waves, etc. However, supplying and transporting kerosene in a flammable state to the burner poses safety problems such as the generation of flames. Because of this, atomized kerosene is supplied into the burner at a low temperature, which naturally causes problems such as poor ignition performance, so it has not been put into practical use yet.

Furthermore, when a conventionally used burner for city gas or the like is used for kerosene, there are the following problems.

In order to completely burn the atomized kerosene, the mixing ratio of the air M1 supplied into the burner must be close to 100%.
The flame entrainment phenomenon occurs because the flow velocity is lower than that at 1 and the combustion velocity is faster than these.

In addition, regarding ignition performance, the spark discharge from a piezoelectric ignition device does not have enough ignition power to vaporize and ignite the mist droplets in the air-fuel mixture. tends to be inferior.

This idea was made in view of the above circumstances, and by setting restrictions on the flow velocity of the air-fuel mixture in each part, it eliminates the flame entrainment phenomenon and increases safety. The object of the present invention is to provide a kerosene combustion burner that is configured to heat with a single member and can be sufficiently ignited by piezoelectric ignition.

This invention will be explained in detail below based on the illustrated embodiments.

In FIGS. 1 and 2, reference numeral 1 indicates a conveying pipe for supplying a mist mixture M consisting of kerosene and air, the tip of which is closed 2.

A casing-shaped burner main body 3 is provided on the upper side of the conveying pipe 1.
A large number of holes 4 are bored in the partition between the burner main body 3 and the conveying pipe 1.

The burner main body 3 is provided with a groove-shaped spout portion 5 at its upper portion, and a heater member 7 is disposed in the spout portion 5 by a fitting 6.

Furthermore, the hollow cross-sectional area S1 of the conveying pipe 1 is configured to have a relationship of Sl<32 compared to the opening area S2 of the jet nozzle portion 5.

In addition, in the burner body 3 shown in Figs.
As shown in the figure, the spout portion 5 may be ring-shaped.

Further, the heater member 7 may be disposed in the middle lid in the burner main body 3 or in a low-position air-fuel mixture passage as shown in FIG.

In addition, Fig. 5 shows the ignition state of the kerosene combustion burner according to this invention, where the horizontal axis shows the flow velocity of the air-fuel mixture at the jet port of the burner body 3, and the rear axis shows the air ratio in the air-fuel mixture. , curve A shows the ignition limit, and curve B shows the ignition limit at 25°C.

The broken line C indicates the limit of flame entrainment.

That is, the ignition characteristics of the mist kerosene mixture are determined by the relationship between the air ratio and the flow velocity at the jet port 5 of the burner main body 3, and also by the temperature of the mixture, increasing the temperature of the mixture. By doing so, the ignition characteristics can be greatly improved.
Providing the heater member 7 has a great effect.

With this configuration, the mixture M consisting of mist kerosene and air passes through the hole 4 from the conveying pipe 1 and reaches the burner body 3.
It is further fed into the burner body 3 from the spout part 5.
is ejected outward from the burner.

In order to burn this air-fuel mixture, electricity is applied to the heater member 7, and the air-fuel mixture is heated by the heat generated by the heater member 7, and the air-fuel mixture is gasified from a mist-like shape and ignited.

Once combustion starts, the mist mixture M is gasified by the heat of combustion, and the energization of the heater member 7 is stopped when the flame becomes stable.

Further, the flow velocity V3 of the air-fuel mixture at the jet nozzle portion 5 of the burner main body 3 is defined as its combustion velocity V.

Since it is configured to be faster, a good blue flame can be obtained at the same time as ignition, and the combustion speed is V.

Since the structure is such that the flow velocity (2) of the air-fuel mixture in the burner main body 3 and the flow velocity (1) in the conveying pipe 1 are faster, the flame is drawn into the burner main body 3 and no development occurs.

That is, the effective area for combustion is S.

Then, the relationship So>S2>5l(7) is obtained, and Kav
.

Since the relationship <vl<V2 is satisfied, the flame entrainment development can be completely eliminated.

As described above in detail, a casing-like burner main body is connected to a pipe-shaped conveyance tube with a closed end, a communication hole is provided in a partition wall between the conveyance tube and the burner body, and a communication hole is provided in the partition wall between the conveyance tube and the burner body. The structure includes an upward spout and a heater part near the spout, which facilitates gasification of the mixture and prevents the mixing between the conveying pipe, the burner body, and the jet nozzle. It has the following effects: the air velocity can be easily set, a stable blue flame can be obtained, ignition performance and combustion efficiency can be improved, and it can be widely applied to heating equipment such as kerosene stoves.

In addition, since the hollow cross-sectional area of the conveyor tube is larger than the opening area of the ejection port of the burner body, it is possible to prevent the flame from being drawn into the burner body, and it also has the effect of further improving ignition performance. Since the heater member is located at the outlet of the burner body or in the mixture flow path within the burner body, it is easy to heat the mixture, and it is easy to install. This has advantages such as ease of maintenance.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of this invention, Fig. 2 is a sectional view of Fig. 1, and Fig. 3 is a longitudinal sectional view of another embodiment of this invention.
FIG. 4 is an explanatory diagram of the arrangement of heater components, FIG. 5 is an explanatory diagram of the ignition state, and FIG. 6 is a perspective view of a conventional burner. 1... Conveying pipe, 3... Burner body,
4...hole, 5...spout part, 6...
...Mounting tool, 7...Heater part, Sl...
...Hollow sectional view, S2... Opening area, M.
...Mixture, 1'... Kerosene supply pipe, 2'
...Nozzle, 3'...Burner box, M
l...Air, M2...Kerosene, 5'...
...Spout part.

Claims (3)

[Scope of utility model registration request] (1) A casing-like burner body is connected to a pipe-shaped conveyance tube with a closed end, a communication hole is provided in the partition wall between the conveyance tube and the burner body, and the burner body A burner for burning kerosene, characterized in that it is provided with a spout and a heater member is provided in the vicinity of the spout. (2) The kerosene combustion burner according to claim 1, wherein the hollow cross-sectional area of the conveying tube is larger than the opening area of the ejection port of the burner body. (3) A request for registration of a utility model characterized in that the heater member is disposed at the outlet of the ejection port of the burner main body or in the mixing flow path within the burner main body. A burner for burning kerosene according to item 1.