JPH01234708A - Hand burner - Google Patents

Abstract

PURPOSE:To make it possible to discharge main flames to a satisfactory extent, to keep flames, and to ignite fire without fail, by installing to the top of a burner a baffle plate comprising a curved plate and slits, and a hood connected with an air intake pipe in such a manner that the hood may cover said baffle plate. CONSTITUTION:A mixed gas of fuel gas and air is sent to a flame discharge nozzle 45 by way of a pipe 1 by opening a fuel gas valve 31 and an air valve 32. Main flames are discharged from the flame discharge nozzle 45 by ignition and the flames are maintained at slits 41 and 42. When oxygen deficiency condition is generated, a second air valve 73 is opened so as to send air forward to the flame discharge nozzle 45 by way of an air intake pipe 7 and a hood 6. The flames are respectively maintained on two sets of baffle plates D which comprise the slits 41, 42, and curved plates 51 and 52. Therefore, even if the main flames should go out in the flame discharge nozzle, the flames kept on the baffle plates D can ignite fuel gas in the flame discharge nozzle 45 with ease. The baffle plates D are also covered with the hood 6, which prevents the flames from going out by combustion waste gas flowing in the furnace.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a torch-type hand burner for local heating of various heating and melting furnaces, and particularly to a torch-type hand burner for local heating of various heating and melting furnaces.

Regarding a hand burner with excellent flame holding properties.

[Prior art]

In coke heating furnaces, glass melting furnaces, etc.
For igniting coke and melting glass.

Or to uniformly heat these objects.

A torch-type hand burner may be used.

The Kono hand burner is a type of burner in which the top part of the burner is placed in the furnace and the flame is ejected from the nozzle at the tip to locally heat the burner.

Therefore, this hand burner is used by inserting its burner top portion deep into the furnace as described above, and by adjusting the flame size. Therefore, a small-diameter slit is provided in the burner top portion in a direction substantially perpendicular to the axial direction (diameter direction), and the flame is always maintained (flame holding) in the slit.

That is, as shown in FIGS. 5 and 6, the conventional hand burner includes a pipe 1 for feeding a mixed gas of fuel gas and air, and a burner top portion 2 connected to the tip of the pipe 1 by a socket 21. .

It consists of a fuel gas valve 31 and an air pulp 32 connected to the rear end of the pipe 1 via a tee 33.

The burner top part 2 is also provided with slits 22, 23 in its diametrical direction, and discs 24, 25 are provided at the rear of the slits. Above slit 2
2.23 has four locations each.

However, when using the hand burner,
The fuel gas valve 31. The air pulp 32 is opened, and a mixed gas of both gases is jetted out from the tip opening 20 of the burner top part 2, and is ignited to emit a flame. At this time, the gas also leaks from the slits 22 and 23,
The flame holding is performed in this part. By adjusting the degree of opening and closing of both the valves 31 and 32, the amount of flame radiated from the nozzle is adjusted.

[Problem to be Solved] However, since the hand burner described above performs local heating deep inside the heating furnace, the flame may go out due to lack of oxygen deep inside the furnace.

Also, at this time, the flame nozzle of the hand burner is moved to a part where oxygen is present, such as the furnace entrance, and an attempt is made to ignite using the flame holding plate, but the flame holding may disappear.

That is, flame stabilization is normally performed in the slits 22 and 23, but since combustion waste gas is flowing inside the furnace, the flame stabilization may disappear due to the flow of the gas. Therefore, the disc 24.25 in the above conventional hand burner
is intended to prevent such gas flow from extinguishing, but it is defenseless against gas flow from the lateral direction of the burner top portion 2.

Moreover, since the disks 24, 25 and the slits 22, 23 are oriented in the diametrical direction of the burner top portion 2, the flame holding is also oriented diametrically. Therefore, as mentioned above, even if the main flame at the nozzle goes out and you try to ignite it again using this flame holding, the fuel gas at the nozzle will not ignite successfully and the fuel gas will continue to be emitted from the nozzle at 1 o'clock. There is also.

Moreover, the above-mentioned problem occurs not only in the heating furnace but also in the combustion furnace.

In view of such prior art, the present invention has been developed through intensive studies on the structure of the burner top portion at the tip of the hand burner, and has been developed to ensure that the main flame can be radiated sufficiently even in the innermost part of the furnace where oxygen deficiency is likely to occur, as well as in the combustion waste gas. .

It is an object of the present invention to provide a hand burner that can reliably perform flame-holding ignition.

[Means for solving problems]

The present invention has a pipe for delivering a mixed gas of fuel gas and air, a cylindrical burner top portion provided at the tip of the pipe, and a slit opened in the burner top portion in a substantially diametrical direction. In the hand burner, the burner top portion is provided with a flame holding plate including the slit and a curved plate disposed around the slit and expanding toward the flame nozzle, and the flame holding plate includes at least Furthermore, a cylindrical hood that opens toward the flame nozzle and covers the burner top is provided on the outside of the flame stabilizing plate, and air for introducing secondary air is provided inside the hood. A hand burner characterized by connecting an introduction pipe.

What should be noted in the present invention is that at least one flame holding plate consisting of a slit and a curved plate is provided in the burner top portion, and the flame nozzle is covered with the flame holding plate on the outside of the flame holding plate. A cylindrical hood that opens in the direction is installed,
Furthermore, an air introduction pipe for sending secondary air toward the nozzle is connected inside the hood.

The curved plate has a curved shape, and is disposed so as to cover the outside of the slit from the rear of the slit while opening toward the front. The slit is opened approximately in the diameter direction of the burner top, and its diameter is usually 1 to 2C.
Im. Further, it is preferable to provide two such flame holding plates to ensure flame holding.

In addition, the air introduction pipe connected to the hood may be arranged in double rows along the outer wall of the mixed gas delivery pipe, or arranged in a double pipe arrangement around the outer periphery of the pipe (see Fig. 1). ) can also be done. In the latter case, since the air introduction pipe covers the outer periphery of the pipe, it can also serve as protection for the pipe, and the pipe portion of the hand burner can be made compact (thin).

[Action and effect]

In the hand burner of the present invention, a flame-holding plate consisting of a curved plate and a slit is provided in the burner top portion, and a hood that opens in the direction of the flame outlet is provided to cover the flame-holding plate.2 Air is introduced into the hood. Connect the tubes.

Therefore, in a zero-burner hand burner, a mixed gas of fuel gas and air is sent to the top of the burner as before, and the mixed gas is emitted from the nozzle at the tip of the burner.
It is ignited, becomes the main flame, and is injected. At this time, a small amount of the above-mentioned mixed gas leaks from the slits of the flame-holding plate and is ignited, resulting in a flame-holding state.

However, when a hand burner in such a state is used with its burner top inserted deep into a heating furnace, the heating part may lack oxygen (oxygen deficiency).
When this occurs, secondary air is introduced into the hood through the air introduction pipe, and air is supplied from the hood to the nozzle area to cause combustion.

Further, when the main flame at the nozzle extinguishes in the case of oxygen deficiency, etc., the flame holding in the flame holding plate helps re-ignition.

In addition, since this flame holding plate has a curved plate that expands forward, the flame holding flame burning in the slit portion is guided by the curved plate and moves forward, and is further expanded by the secondary air flowing inside the hood. It is sent forward and ignites the gas being released from the nozzle.

Therefore, it is easy to ignite the main flame.

In addition, the outside of the slit in the opening direction is covered by a curved plate, and the outer periphery is further covered by a hood, so the flow of combustion waste gas, etc.
The flame retention at the slit part never disappears.

As described above, according to the present invention, complete combustion can be carried out even in combustion waste gas or in places where oxygen deficiency is likely to occur, such as deep inside the furnace, and flame stability can be maintained reliably.

Furthermore, it is possible to provide a hand burner that can easily re-ignite fuel gas once extinguished.

Moreover, for this reason, the combustion range of the burner has become wider, and it has become possible to burn fuel gas of 4,000 to 20,000 kcal/hour. Furthermore.

By adjusting the amount of primary air fed into the pipe and secondary air fed into the hood, the state of the flame can be arbitrarily changed from sharp flame to mild flame.

In addition, when the mixed gas delivery pipe is arranged in a double pipe type inside the air introduction pipe, the entire hand burner becomes slim and compact.

[Example] A hand burner according to an example of the present invention will be described with reference to FIGS. 1 to 4.

The hand burner of this example includes a gas delivery pipe 1, a burner top part 4 and a hood 6 provided at the tip thereof,
It consists of an air introduction pipe 7 provided on the outer periphery of the pipe 1.

The pipe 1 and the burner top part 4 are connected to the socket 46.
Concatenate by. The burner top portion 4 has a cylindrical shape as shown in FIGS. 2 to 4, and has a flame nozzle 45 opening at its tip and a flame stabilizing plate provided on its peripheral wall. There are two boards. Part 1
One is four slits 41 bored in the peripheral wall of the burner top portion 4, and a curved plate 51 that expands forward so as to cover the slits 41. The other one is four slits 42 and a two-curved plate 52, which are similarly drilled. The curved plate 51 has a deep cup-shaped cross section, and has a curved surface from the rear to the front. Also.

The curved plate 52 has a cup-shaped cross section shallower than the curved surfaces Vi and 51, and has a similar curved surface. In addition, the above pipe 1
A fuel gas valve 31 and an air valve 32 are connected to the rear end by a tee 33.

Next, on the outer circumference of the vibrator 1, there are two
It was installed in a heavy pipe type. An air introduction pipe 7 for introducing secondary air is provided. The air introduction pipe 7 has its distal end opened into the hood 6, and its rear end connected to a secondary air valve 73 via an elbow 72. The hood 6 expands in the direction of the flame nozzle 45 and covers the outside of the burner top portion 4.

Since the hand burner of this example is configured as described above, the fuel gas valve 31. By opening the air pulp 32, a mixed gas of fuel gas and air is sent to the nozzle port 45 by the vibrator 1. When the gas is ignited, a main flame is injected from the nozzle port 45. Flame stability is maintained in the slits 41 and 42.

When an oxygen deficiency condition occurs, such as when the burner top part 4 is inserted deep into the heating furnace, the 2
Next, open the air valve 73 and open the air introduction pipe 7. Hood 6
Air is sent to the front of the eruption port 45 through. As a result, the oxygen deficiency state near the nozzle port 45 is resolved, and complete combustion is performed. In addition, when it is desired to adjust the main flame from the ejection port 45 to sharp or mild, each of the pulps 31 and 32 described above can be used.
Adjust the opening degree of ゜73.

Thus, flame stabilization is maintained in the flame stabilizing plates 2 and 11, each consisting of slits 41 and 42 and curved plates 51 and 52. Therefore, even if the main flame at the flame nozzle 45 once disappears, the flame holding at the cough flame holding board is easily maintained because it is ejected in the direction of the flame nozzle 45 by the curved plates 51 and 52. The fuel gas in the nozzle port 45 can be ignited immediately. Further, since the flame holding plate is covered by the hood 6, the flame holding plate is not blown out by the flow of combustion waste gas in the furnace.

[Brief explanation of the drawing]

1 to 4 show a hand burner according to an embodiment, FIG. 1 is a side sectional view thereof, FIG. 2 is an enlarged sectional view of the tip, and FIGS. 3 and 4 are the same as that in FIG. A-A line and B
5 and 6 are a sectional view taken along the line -B, FIG. 5 is a sectional view of a conventional hand burner, FIG. 5 is a side sectional view thereof, and FIG. 6 is a sectional view of the tip. 100. Vibrator for gas delivery. 2.4... Burner top part. 41.42... slit 45,,, fumarole. 51.52. ,,curved plate. 600. Food 5 701. Air introduction pipe.

Claims (2)

[Claims] (1) A hand that has a pipe that delivers a mixed gas of fuel gas and air, a cylindrical burner top portion provided at the tip of the pipe, and a slit that opens approximately in the diameter direction of the burner top portion. In the burner, the burner top portion is provided with a flame-holding plate including the slit and a curved plate disposed around the slit and expanding toward the flame nozzle, and the flame-holding plate has at least one flame holding plate. Furthermore, a cylindrical hood that opens toward the flame nozzle and covers the burner top is provided on the outside of the flame stabilizing plate, and air is introduced into the hood for introducing secondary air. A hand burner characterized by connecting tubes. (2) The hand burner according to claim 1, wherein the mixed gas delivery pipe is provided inside the air introduction pipe.