JPH0512566Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a combustor suitable for use in a radiation heater, a dryer, etc.

[Conventional technology]

In conventional radiant heaters or dryers, a combustion chamber is provided at the root end of the radiant pipe where piping is completed, and a combustor is connected to this combustion chamber. Attach a blower to the air supply port of the combustor, or in the case of the air suction method, attach a suction blower to the tip of the radiant tube, and as these blowers operate, a mixture of gases will be supplied to the combustor for combustion. The combustion gas was then blown out toward the radiant tube to provide heating and drying effects.

[Problem that the invention attempts to solve]

However, with the combustors used in the conventional radiant heaters and dryers mentioned above, the flame generated by combustion blows directly into the radiant tube, which can heat up the radiant tube and cause accidents such as fires. There was a danger that this would occur.

Conventionally, a combustion tube was connected to the mouth of the radiant tube to prevent the radiant tube from heating up, or when the radiant tube was installed through a wall, a heat insulating material was inserted between the wall and the radiant tube. However, even if the combustion cylinders were connected in this way or insulation material was used,
The fundamental problem of radiant tube heating remains unsolved, and the effort and expense of using combustion tubes and insulation materials increases the piping costs for radiant tubes and affects the prices of heaters and dryers. I had a problem.

Therefore, the technical problem of the present invention is to prevent the mouth of the radiant tube from being heated more than necessary by the flame blown out from the combustor.

Another technical object of the present invention is to provide a combustor that can exhibit excellent combustion effects.

[Means for solving problems]

The measures taken in the present invention to solve the above technical problems are as follows.

A primary combustion tube is installed inside the vessel, which has a tip port connected to the radiation tube and an air supply port for pushing or sucking air, and a mixture pipe connecting the above air supply port and the primary combustion tube. In the combustor, a gas mixer is installed in the middle, and the gas mixture sent through the mixture pipe is combusted in the primary combustion tube, and the combustion gas is blown out from the tip port toward the radiant tube side. (1) A secondary combustion tube having a hole for secondary air is attached to the tip of the primary combustion tube, and between the outer surface of the secondary combustion tube and the inner surface of the tip opening, A blowout passage is provided to blow out the air taken into the vessel to the radiation tube side.

(2) An air control valve shall be installed in the middle of the mixture pipe connecting the above air supply port and the gas mixer, and a damper for adjusting the air amount shall be installed inside the air supply port of the above body.

[Effect]

The above means works as follows.

The factor (1) above is that secondary air can be sent to the primary combustion tube to further complete the primary combustion, increasing the heating or drying effect, and the primary and secondary combustion tubes can be The tertiary air blown out from the jetting passage along the inner wall surrounds the gas flame that is completely combusted and blown out in the direction of the radiant tube. It makes it possible to prevent heating of the mouth area.

The factor (2) above is that the amount of air sent into the vessel from the air supply port can be adjusted arbitrarily by opening and closing the damper, and it also passes through the air mixture pipe into the primary combustion cylinder. Since the amount of primary air sent in can also be adjusted as desired by the control valve, it is possible to achieve excellent combustion effects by adjusting the amount of air using these dampers and the control valve.

As described above, the above-mentioned technical problem can be solved by the above-mentioned means, and the problems of the conventional technology can be solved.

〔Example〕

Hereinafter, preferred embodiments of the combustor according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are partially omitted configuration diagrams showing the state in which the combustor according to the present invention is connected to a radiant tube for heating or drying, and in the figures, 1 is the body of the combustor;
2 is an air supply port, 3 is a mixture pipe that sends the air supplied from the air supply port 2 to the primary combustion tube 4 installed inside the vessel body 1, and 5 and 6 are air ports installed in the middle of the mixture pipe 3. Control valve and gas mixer, 7 is the mouth 8a of the heat radiation pipe 8
The tip opening (draft tube) of the vessel 1 is shown.

FIG. 1 shows a push-type device that forces air through an air supply port 2 of a vessel 1. In this device, a push-type blower 9 is attached to the air supply port 2, and a radiation tube 8 The tip 8b of is open. On the other hand, FIG. 2 shows a suction type device that sucks air from the tip 8b side of the radiation tube 8. In this device, a suction blower 10 is attached to the tip 8b of the radiation tube 8, and the device body The air supply port 2 is designed to be opened, and the combustor according to the present invention is designed to be usable with either a forced-in or suction-type device.

Next, the internal structure of the combustor will be explained based on FIGS. 3 and 4.

In the figure, 11 is a damper for adjusting the amount of air provided inside the air supply port 2 of the container body 1, and the amount of air sent into the container body 1 by pushing or suction from the air supply port 2 is as follows: By opening and closing this damper 11, it can be adjusted as desired. Note that the amount of primary air that is pushed or sucked into the primary combustion cylinder 4 side through the mixture pipe 3 branched in the middle of the air supply port 2 without passing through the damper 11 is controlled by the above-mentioned control valve. It can be adjusted freely by 5.

The primary combustion tube 4 is connected to and supported by the tip 3a of the mixture pipe 3 inserted into the vessel body 1.
It is attached with the injection port 4a facing the tip port 7. A pilot chip 12 is attached to the injection port 4a, which has a large hole 12a in the center and a large number of small holes 12b around it. The gas-mixed air-fuel mixture (primary air) sent through the air-mixture pipe 3 is combusted, and the gas and flame are blown out from the tip port 7 toward the radiation tube 8 side.

Further, around the tip injection port 4a of the primary combustion tube 4, a substantially cylindrical secondary combustion tube 13 having a large number of secondary air intake holes 13a is installed. Between the outer surface (outer circumferential surface) of the cylinder 13 and the inner wall surface of the tip port 7, the tertiary air taken into the container body 1 is transferred to the inner wall surface of the tip port 7 and the radiation tube 8 connected thereto. A blowout passage 14 is formed along the inner wall surface.

Since the combustor according to the present invention has the configuration as described above, the opening 8a of the radiant tube 8 is connected to the tip opening 7 of the vessel body 1 as shown in FIG. 1 or FIG. When the suction type blowers 9 and 10 are operated, the air pushed or sucked into the container 1 through the air supply port 2 becomes a mixture of gases in the mixer 6 and passes through the mixture pipe 3. The fuel is then supplied to the primary combustion tube 4, where it is combusted. For combustion, the secondary combustion cylinder 13
Since secondary air is supplied to the combustion section from the holes 13a, . . ., complete combustion occurs and flame and gas are blown out from the tip port 7 toward the mouth 8a of the radiation tube 8. At the same time, tertiary air flows from the jetting passage 14 to the tip opening 7.
Since the flame is blown out along the inner wall of the mouth 8a in the direction of the radiation tube 8, the flame blown out by the above combustion is surrounded by tertiary air, The air exhibits a heat insulating effect and can prevent the opening 8a of the radiation tube 8 from being heated.

Further, the amount of each air pushed into or sucked into the container body 1 from the air supply port 2 is determined by the damper 11.
It can be adjusted to the optimum amount for combustion by opening and closing operations, and furthermore, it passes through the mixture pipe 3 to the primary combustion tube 4.
The amount of primary air supplied to the combustion chamber can also be adjusted to the optimum amount for combustion by operating the control valve 5.

〔effect〕

As described above, according to the combustor of the present invention, the air (tertiary air) taken into the vessel body wraps around the flame generated by combustion to prevent the mouth part of the radiant tube from heating. This eliminates the need for troublesome work such as connecting a combustion tube to the mouth of the radiant tube to prevent overheating, or interposing insulation material between the hole in the wall and the radiant tube, making piping and installation of the radiant tube easier. It has the advantage of being relatively easy and economical to supply air to the vessel and primary combustion tube by adjusting the opening and closing of dampers and control valves provided in the air intake and mixture pipe. It has the advantage of being able to adjust the amount of air to an optimal state and allow the combustor to burn in a perfect state, and its practical value is extremely high.

[Brief explanation of the drawing]

Figures 1 and 2 are configuration diagrams showing push type and suction type heating or drying devices equipped with a combustor according to the present invention, Figure 3 is an enlarged sectional view of the main parts of the present invention, and Figure 4 The figure is an enlarged sectional view taken along line A-A in FIG. 3. 1 is the vessel body, 2 is the air supply port, 3 is the mixture pipe, 4 is 1
Next combustion cylinder, 5 is an air control valve, 6 is a gas mixer, 7
is the tip port, 8 is the radiation tube, 9 and 10 are the blowers, 11
13 is a damper, 13 is a secondary combustion cylinder, 13a is a hole for secondary air, and 14 is a blowout passage.

Claims (1)

[Scope of Claim for Utility Model Registration] A primary combustion cylinder is installed inside a vessel which is provided with a tip end to which a radiation tube is connected and an air supply port for pushing or sucking air, and the above-mentioned air supply port and 1 A gas mixer is installed in the middle of the mixture pipe that connects the secondary combustion tube, and the gas mixture sent through this mixture tube is combusted in the primary combustion tube, and the combustion gas is blown out from the tip port to the radiant tube side. In the combustor configured as above, a secondary combustion tube with a hole for secondary air is attached to the tip of the primary combustion tube, and the outer surface of the secondary combustion tube and the inner surface of the tip opening are connected to each other. A blowout passage is provided between the container body and the air intake tube for blowing out the air taken into the vessel to the radiation tube side, and an air control valve is installed in the middle of the mixture pipe connecting the air supply port and the gas mixer. A combustor characterized by a damper for adjusting the amount of air installed inside the air supply port of the vessel body.